EP1173538B1 - Detergent tablets with an improved performance for dishwashing machines - Google Patents

Description

The present invention is in the field of enzyme-containing washing and active moldings. It particularly affects performance-enhanced multiphase Detergent tablets, which have advantages due to the division into several phases be achieved in cleaning activity. Such detergent tablets comprise in particular detergent tablets for automatic dishwashing.

Shaped detergent tablets for machine dishwashing are state of the art broadly described and delight consumers because of the simple dosage increasing popularity. Tableted detergents have powdered versus Products have a number of advantages: They are easier to dose and to handle have advantages in terms of storage and transport due to their compact structure. There is therefore an extremely wide prior art for detergent tablets. which is also reflected in an extensive patent literature. That is early on Developers of tablet-shaped products got the idea about different Composite areas of the shaped body certain ingredients only under defined To release conditions in the washing or cleaning cycle in order to ensure cleaning success to improve. In addition to those well known from pharmacy Core / shell tablets and ring / core tablets, in particular multi-layer molded articles prevailed today for many areas of washing and cleaning or hygiene Tobe offered.

Multi-phase cleaning tablets for the toilet are described for example in EP 055 100 (Jeyes Group). This document discloses blocks of toilet detergent comprising a molded body of a slowly soluble detergent composition in which a bleach tablet is embedded. At the same time, this document discloses the most varied forms of configuration of multiphase shaped bodies. According to the teaching of this document, the moldings are produced either by inserting a compressed bleach tablet into a mold and pouring this tablet with the detergent composition, or by pouring part of the detergent composition into the mold, followed by inserting the pressed bleach tablet and possibly subsequently pouring over it with another detergent composition. Enzymes, the machine cleaning of dishes or other special configurations of the present invention are neither mentioned nor suggested in this document.

EP 481 547 (Unilever) also describes multiphase detergent tablets which are to be used for automatic dishwashing. These shaped bodies are in the form of core / shell tablets and are produced by gradually compressing the constituents: first, a bleaching agent composition is pressed into a shaped body, which is placed in a matrix half-filled with a polymer composition, which is then filled with another polymer composition and into one provided with a polymer jacket bleach molding is pressed. The process is then repeated with an alkaline detergent composition, so that a three-phase shaped body results. Nothing is said in this document about enzymes and enzyme performance.

The aspect of "controlled release" of ingredients, like to translate as "controlled release" called, was and is also in the field of washing and Cleaning agents worked intensively, so that this also a variety of Publications exist. In the field of washing and cleaning active Shaped bodies beat most fonts through disintegration aids or Shower systems accelerate the release of certain shaped body areas before the slower release of individual components, e.g. by coating, wrapping or deliberate release delay takes on a rather subordinate position.

The older German patent application DE 198 51 426.3 (Henkel KGaA) describes a process for the production of multiphase detergent tablets, in which a particulate premix is pressed to give moldings which have a trough which is later made up of a melt suspension or emulsion produced separately from one Envelope and one or more active substance (s) dispersed or suspended in it. Paraffins or polyethylene glycols are mentioned as coating substances in this document; enzymes, bleaching agents, bleach activators, surfactants, corrosion inhibitors, scale inhibitors, cobuilders and / or fragrances are suitable as active substances. Liquid enzyme preparations are not mentioned in this document, and further details on increasing the performance of enzymes in automatic dishwashing detergents cannot be found in this document.

The present invention was based on the object, detergent tablets for to provide automatic dishwashing, the targeted release of certain Ingredients at predetermined times in the washing and cleaning cycle enable and on the other hand through excellent storage and transport stability distinguish and superior performance in the can show a wide variety of applications. The ones to be provided Shaped bodies should in particular with regard to storage stability and performance of enzymes to be superior to conventional moldings.

It has now been found that detergent tablets with the have the desired properties produced in a flexible and simple way, if one liquid enzyme preparations with coating substances and optionally other ingredients Melt dispersions processed, which are then directly or after shaping Processing can be applied to or introduced into the molded body.

a) einer oder mehreren Hüllsubstanz(en), die einen Schmelzpunkt oberhalb von 30°C aufweist/aufweisen,

b) einer oder mehreren in der/den Hüllsubstanz(en) dispergierten flüssigen Enzymzubereitung(en) sowie

c) optional weiteren Hilfs- und/oder Wirkstoffen

besteht.The present invention relates to detergent tablets for machine dishwashing, which contain builders, enzymes and optionally further detergent ingredients and in which a region of the tablet is formed in or on a base tablet

a) one or more coating substance (s) which have a melting point above 30 ° C.,

b) one or more liquid enzyme preparation (s) dispersed in the coating substance (s) and

c) optionally further auxiliaries and / or active ingredients

consists.

In the context of the present invention, commercially available liquid Enzyme preparations, if necessary with the addition of further auxiliaries and / or active ingredients embedded in a matrix of envelope material (ien) and form a region of the molded body. The enzymes become faster on the one hand and on the other hand from this matrix Surprisingly released over a longer period of time, so that a quick and continuous release of the enzymes is achieved. The maximum of Enzyme activity is reduced by the procedure according to the invention in the cleaning cycle reached much earlier, and enzyme activity remains throughout Cleaning cycle at a higher level.

In the context of the present invention, the term “region” denotes the spatial area of the entire molded body that contains the mixture of coating substance, contains liquid enzyme preparation and optional active ingredients. This region can have the form of a layer in the simplest case, but it can also for example, the filled part of a trough. The term "region" is not on restricted to one region, but the substances mentioned can also be used in several Regions are present over the molded body.

In the context of the present invention, the term “shaped base body” characterizes the by means of tablets known per se which produce the "region" not yet included. In other words, the base molding is / are the area (s) of the entire molded body that are not "region" in the sense of the invention. In preferred Embodiments of the present invention become the base molding first manufactured and the region in a further step on or in this Base molding applied or introduced. The resulting product is shown below referred to the generic term "molded article" or "tablet".

The most commonly used enzymes in detergents and cleaning agents include Lipases, cellulases, amylases and proteases. Beyond that too Hemicellulases, peroxidases and pectinases used in special products. In Detergents for automatic dishwashing are in particular proteases, Amylases and lipases of importance. Usually the enzymes are used in powder products in a granulated and encapsulated form and the Detergent added in this form. In water-based liquid detergent would usually dissolve these granulated and encapsulated enzymes the use of liquid enzyme concentrates is preferred here. Such Liquid enzyme concentrates are either homogeneously based on one basis Propylene glycol / water or heterogeneous as a slurry, or they are microencapsulated Structure before. The use of liquid enzyme products in solid detergents is not described so far.

Preferred liquid proteases are, for example, Savinase® L, Durazym® L, Esperase® L, and Everlase® from Novo Nordisk, Optimase® L, Purafect® L, Purafect® OX L, Properase® L from Genencor International, and BLAP® L from Biozym Ges.mbH.
Preferred amylases are Termamyl® L, Duramyl® L, and BAN® from Novo Nordisk, Maxamyl® WL and Purafect® HPAm L from Genencor International.
Preferred lipases are Lipolase® L, Lipolase® ultra L and Lipoprime® L from Novo Nordisk and Lipomax® L from Genencor International.

As slurries or microencapsulated liquid products, e.g. Products like the one with SL or LCC designated products from Novo Nordisk are used. The above commercially available liquid enzyme preparations contain, for example, 20 to 90% by weight Propylene glycol or mixtures of propylene glycol and water. As part of the Preferred detergent tablets are thereby present invention characterized in that the region contains one or more liquid amylase preparations and / or contains one or more liquid protease preparations.

a) 40 bis 99.5 Gew.-%, vorzugsweise 50 bis 97,5 Gew.-%, besonders bevorzugt 60 bis 95 Gew.-% und insbesondere 70 bis 90 Gew.-% eines oder mehrerer Hüllsubstanz(en), die einen Schmelzpunkt oberhalb von 30°C aufweist/aufweisen,

b) 0,5 bis 60 Gew.-%, vorzugsweise 1 bis 40 Gew.-%, besonders bevorzugt 2,5 bis 30 Gew.-% und insbesondere 5 bis 25 Gew.-% einer oder mehreren in der/den Hüllsubstanz(en) dispergierten flüssigen Enzymzubereitung(en) sowie

c) 0 bis 20 Gew.-%, vorzugsweise 0 bis 15 Gew.-%, besonders bevorzugt 0 bis 10 Gew.-% und insbesondere 0 bis 5 Gew.-% optional weiterer Hilfs- und/oder Wirkstoffe

besteht.The region of the shaped body can contain the mentioned ingredients in varying amounts, the freedom of formulation being unlimited for the person skilled in the art. In the usual field of application, detergent tablets have been found to be preferred in which the region of the tablet, based in each case on the region

a) 40 to 99.5% by weight, preferably 50 to 97.5% by weight, particularly preferably 60 to 95% by weight and in particular 70 to 90% by weight of one or more coating substance (s) which have a melting point has / have above 30 ° C,

b) 0.5 to 60% by weight, preferably 1 to 40% by weight, particularly preferably 2.5 to 30% by weight and in particular 5 to 25% by weight of one or more in the coating substance (s) ( dispersed liquid enzyme preparation (s) and

c) 0 to 20% by weight, preferably 0 to 15% by weight, particularly preferably 0 to 10% by weight and in particular 0 to 5% by weight, optionally of further auxiliaries and / or active ingredients

consists.

As already mentioned above, the region can be done in many different ways be designed. For reasons of process economy in manufacture, it is in the Within the scope of the present invention, the region prefers the shape of an insert, a core or a layer.

Shaped bodies according to the invention contain in one (or more) region (s) Envelope materials included liquid enzyme preparations. The basic molded body contains other important ingredients of cleaning agents, especially builders.

In the cleaning agents according to the invention for automatic dishwashing all builders commonly used in washing and cleaning agents be included, in particular thus zeolites, silicates, carbonates, organic cobuilders and as an important builder in machine dishwashing detergents, also phosphates.

Suitable crystalline layered sodium silicates have the general formula NaMSi _x O _{2x + 1} ^· H ₂ O, where M is sodium or hydrogen, x is a number from 1.9 to 4 and y is a number from 0 to 20, preferred values for x 2, 3 or 4. Such crystalline layered silicates are described, for example, in European patent application EP-A-0 164 514 . Preferred crystalline layered silicates of the formula given are those in which M represents sodium and x assumes the values 2 or 3. In particular both β- and δ-sodium disilicates Na ₂ Si ₂ O ₅ ^· yH ₂ O are preferred, with β-sodium disilicate being obtainable for example by the method / described in the international patent application WO-A-91 08,171th

Amorphous sodium silicates with a modulus Na ₂ O: SiO ₂ of 1: 2 to 1: 3.3, preferably 1: 2 to 1: 2.8 and in particular 1: 2 to 1: 2.6, can also be used are delayed in dissolving and have secondary washing properties. The delay in dissolution compared to conventional amorphous sodium silicates can be caused in various ways, for example by surface treatment, compounding, compacting / compression or by overdrying. In the context of this invention, the term “amorphous” is also understood to mean “X-ray amorphous”. This means that the silicates in X-ray diffraction experiments do not provide sharp X-ray reflections, as are typical for crystalline substances, but at most one or more maxima of the scattered X-rays, which have a width of several degree units of the diffraction angle. However, it can very well lead to particularly good builder properties if the silicate particles provide washed-out or even sharp diffraction maxima in electron diffraction experiments. This is to be interpreted as meaning that the products have microcrystalline areas of size 10 to a few hundred nm, values up to max. 50 nm and in particular up to max. 20 nm are preferred. Such so-called X-ray amorphous silicates, which also have a delay in dissolution compared to conventional water glasses, are described, for example, in German patent application DE-A-44 00 024 . Compacted / compacted amorphous silicates, compounded amorphous silicates and over-dried X-ray amorphous silicates are particularly preferred.

The finely crystalline, synthetic and bound water-containing zeolite used is preferably zeolite A and / or P. As zeolite P, zeolite MAP® (commercial product from Crosfield) is particularly preferred. However, zeolite X and mixtures of A, X and / or P are also suitable. Commercially available and can preferably be used in the context of the present invention, for example a co-crystallizate of zeolite X and zeolite A (about 80% by weight of zeolite X) ), which is sold by CONDEA Augusta SpA under the brand name VEGOBOND AX® and by the formula nNa ₂ O ^· (1-n) K ₂ O ^· Al ₂ O ₃ ^· (2 - 2.5) SiO ₂ ^· (3.5 - 5.5) H ₂ O can be described. Suitable zeolites have an average particle size of less than 10 μm (volume distribution; measurement method: Coulter Counter) and preferably contain 18 to 22% by weight, in particular 20 to 22% by weight, of bound water.

It goes without saying that the generally known phosphates are also used as Builder substances possible, provided that such use is not for ecological reasons should be avoided. Have among the variety of commercially available phosphates the alkali metal phosphates with particular preference for pentasodium or Pentapotassium triphosphate (sodium or potassium tripolyphosphate) in the washing and Detergent industry the most important.

Alkali metal phosphates is the general term for the alkali metal (especially sodium and potassium) salts of the various phosphoric acids, in which one can differentiate between metaphosphoric acids (HPO ₃ ) _n and orthophosphoric acid H ₃ PO _{4 in} addition to higher molecular weight representatives. The phosphates combine several advantages: They act as alkali carriers, prevent limescale deposits on machine parts and lime incrustations in fabrics and also contribute to cleaning performance.

Sodium dihydrogen phosphate, NaH ₂ PO ₄ , exists as a dihydrate (density 1.91 gcm ^-3 , melting point 60 °) and as a monohydrate (density 2.04 gcm ^-3 ). Both salts are white, water-soluble powders that lose water of crystallization when heated and at 200 ° C into the weakly acidic diphosphate (disodium hydrogen diphosphate, Na ₂ H ₂ P ₂ O ₇ ), at higher temperature in sodium trimetaphosphate (Na ₃ P ₃ O ₉ ) and Maddrell's salt (see below), pass over, NaH ₂ PO ₄ reacts acidically; it arises when phosphoric acid is adjusted to a pH of 4.5 with sodium hydroxide solution and the mash is sprayed. Potassium dihydrogen phosphate (primary or monobasic potassium phosphate, potassium biphosphate, KDP), KH ₂ PO ₄ , is a white salt with a density of 2.33 gcm ^-3 , has a melting point of 253 ° [decomposition to form potassium polyphosphate (KPO ₃ ) _x ] and is light soluble in water.

Disodium hydrogen phosphate (secondary sodium phosphate), Na ₂ HPO ₄ , is a colorless, very easily water-soluble crystalline salt. It exists anhydrous and with 2 mol. (Density 2.066 gcm ^-3 , water loss at 95 °), 7 mol. (Density 1.68 gcm ^-3 , melting point 48 ° with loss of 5 H ₂ O) and 12 mol. Water ( Density 1.52 gcm ^-3 , melting point 35 ° with loss of 5 H ₂ O), becomes anhydrous at 100 ° and changes to diphosphate Na ₄ P ₂ O ₇ when heated more strongly. Disodium hydrogen phosphate is prepared by neutralizing phosphoric acid with soda solution using phenolphthalein as an indicator. Dipotassium hydrogen phosphate (secondary or dibasic potassium phosphate), K ₂ HPO ₄ , is an amorphous, white salt that is easily soluble in water.

Trisodium phosphate, tertiary sodium phosphate, Na ₃ PO ₄ , are colorless crystals which, as dodecahydrate, have a density of 1.62 gcm ^-3 and a melting point of 73-76 ° C (decomposition), as decahydrate (corresponding to 19-20% P ₂ O ₅ ) a melting point of 100 ° C and in anhydrous form (corresponding to 39-40% P ₂ O ₅ ) have a density of 2.536 gcm ^-3 . Trisodium phosphate is readily soluble in water with an alkaline reaction and is produced by evaporating a solution of exactly 1 mol of disodium phosphate and 1 mol of NaOH. Tripotassium phosphate (tertiary or triphase potassium phosphate), K ₃ PO ₄ , is a white, deliquescent, granular powder with a density of 2.56 gcm ^-3 , has a melting point of 1340 ° and is easily soluble in water with an alkaline reaction. It arises, for example, when Thomas slag is heated with coal and potassium sulfate. Despite the higher price, the more soluble, therefore highly effective, potassium phosphates are often preferred over corresponding sodium compounds in the cleaning agent industry.

Tetrasodium diphosphate (sodium pyrophosphate), Na ₄ P ₂ O ₇ , exists in anhydrous form (density 2.534 gcm ^-3 , melting point 988 °, also stated 880 °) and as decahydrate (density 1.815-1.836 gcm ^-3 , melting point 94 ° with loss of water) , Substances are colorless crystals that are soluble in water with an alkaline reaction. Na ₄ P ₂ O ₇ is formed by heating disodium phosphate to> 200 ° or by reacting phosphoric acid with soda in a stoichiometric ratio and dewatering the solution by spraying. The decahydrate complexes heavy metal salts and hardness formers and therefore reduces the hardness of the water. Potassium diphosphate (potassium pyrophosphate), K ₄ P ₂ O ₇ , exists in the form of the trihydrate and is a colorless, hygroscopic powder with a density of 2.33 gcm ^-3 , which is soluble in water, the pH value being 1% Solution at 25 ° is 10.4.

Condensation of the NaH ₂ PO ₄ or the KH ₂ PO ₄ produces higher moles. Sodium and potassium phosphates, in which one can differentiate cyclic representatives, the sodium or potassium metaphosphates and chain-like types, the sodium or potassium polyphosphates. A large number of terms are used in particular for the latter: melt or glow phosphates, Graham's salt, Kurrol's and Maddrell's salt. All higher sodium and potassium phosphates are collectively referred to as condensed phosphates.

The technically important pentasodium triphosphate, Na ₅ P ₃ O ₁₀ (sodium tripolyphosphate), is an anhydrous or non-hygroscopic, water-soluble salt of the general formula NaO- [P (O) (ONa) -O] _n that crystallizes with 6 H ₂ O. -Na with n = 3. Approx. 17 g of the salt free from water of crystallization dissolve in 100 g of water at room temperature, approx. 20 g at 60 ° and around 32 g at 100 °; After heating the solution at 100 ° for two hours, hydrolysis produces about 8% orthophosphate and 15% diphosphate. In the production of pentasodium triphosphate, phosphoric acid is reacted with sodium carbonate solution or sodium hydroxide solution in a stoichiometric ratio and the solution is dewatered by spraying. Similar to Graham's salt and sodium diphosphate, pentasodium triphosphate dissolves many insoluble metal compounds (including lime soaps, etc.). Pentapotassium triphosphate, K ₅ P ₃ O ₁₀ (potassium tripolyphosphate), is commercially available, for example, in the form of a 50% strength by weight solution (> 23% P ₂ O ₅ , 25% K ₂ O). The potassium polyphosphates are widely used in the detergent and cleaning agent industry. There are also sodium potassium tripolyphosphates which can also be used in the context of the present invention. These occur, for example, when hydrolyzing sodium trimetaphosphate with KOH: (NaPO ₃ ) ₃ + 2 KOH → Na ₃ K ₂ P ₃ O ₁₀ + H ₂ O

According to the invention, these are exactly like sodium tripolyphosphate, potassium tripolyphosphate or mixtures of these two can be used; also mixtures of Sodium tripolyphosphate and sodium potassium tripolyphosphate or mixtures of Potassium tripolyphosphate and sodium potassium tripolyphosphate or mixtures of Sodium tripolyphosphate and potassium tripolyphosphate and sodium potassium tripolyphosphate can be used according to the invention.

The detergent tablets according to the invention are preferably thereby characterized in that the basic molded body builder in amounts of 20 to 80 wt .-%, preferably from 25 to 75% by weight and in particular from 30 to 70% by weight, in each case based on the base molding.

As organic cobuilders in the machine according to the invention Dishwashing detergents, in particular polycarboxylates / polycarboxylic acids, polymers Polycarboxylates, aspartic acid, polyacetals, dextrins, other organic cobuilders (see below) and phosphonates are used. These classes of substances will described below.

Usable organic builders are, for example, those in the form of their Polycarboxylic acids which can be used are sodium salts, with polycarboxylic acids being such Carboxylic acids are understood that carry more than one acid function. For example these are citric acid, adipic acid, succinic acid, glutaric acid, malic acid, tartaric acid, Maleic acid, fumaric acid, sugar acids, aminocarboxylic acids, nitrilotriacetic acid (NTA), if such use is not objectionable for ecological reasons, and Mixtures of these. Preferred salts are the salts of polycarboxylic acids such as Citric acid, adipic acid, succinic acid, glutaric acid, tartaric acid, sugar acids and Mixtures of these.

The acids themselves can also be used. The acids have besides theirs Builder effect typically also the property of an acidifying component and thus also serve to set a lower and milder pH value of washing or Detergents. In particular, citric acid, succinic acid, To name glutaric acid, adipic acid, gluconic acid and any mixtures of these.

Polymeric polycarboxylates are also suitable as builders, for example those Alkali metal salts of polyacrylic acid or polymethacrylic acid, for example those with a relative molecular mass of 500 to 70,000 g / mol.

In the context of this document, the molecular weights given for polymeric polycarboxylates are weight-average molecular weights M _{w of} the particular acid form, which were determined in principle by means of gel permeation chromatography (GPC), a UV detector being used. The measurement was carried out against an external polyacrylic acid standard, which provides realistic molecular weight values due to its structural relationship to the polymers investigated. This information differs significantly from the molecular weight information for which polystyrene sulfonic acids are used as standard. The molecular weights measured against polystyrene sulfonic acids are generally significantly higher than the molecular weights given in this document.

Suitable polymers are in particular polyacrylates, which preferably have a molecular weight of Have 2000 to 20,000 g / mol. Because of their superior solubility, can this group in turn the short-chain polyacrylates, the molecular weights from 2000 to 10000 g / mol, and particularly preferably from 3000 to 5000 g / mol, preferably his.

Also suitable are copolymeric polycarboxylates, especially those of acrylic acid with methacrylic acid and acrylic acid or methacrylic acid with maleic acid. As Copolymers of acrylic acid with maleic acid have proven to be particularly suitable Contain 50 to 90 wt .-% acrylic acid and 50 to 10 wt .-% maleic acid. Your relative Molecular mass, based on free acids, is generally from 2000 to 70,000 g / mol, preferably 20,000 to 50,000 g / mol and in particular 30,000 to 40,000 g / mol.

The (co) polymeric polycarboxylates can either be as a powder or as an aqueous solution be used. The content of the agents in (co) polymeric polycarboxylates is preferably 0.5 to 20% by weight, in particular 3 to 10% by weight.

To improve water solubility, the polymers can also allylsulfonic acids, such as for example allyloxybenzenesulfonic acid and methallylsulfonic acid, as a monomer contain.

Biodegradable polymers of more than two are also particularly preferred various monomer units, for example those which are salts of the monomers Acrylic acid and maleic acid as well as vinyl alcohol or vinyl alcohol derivatives or the as monomeric salts of acrylic acid and 2-alkylallylsulfonic acid and sugar derivatives contain.

Further preferred copolymers are those which are described in German patent applications DE-A-43 03 320 and DE-A-44 17 734 and which preferably contain acrolein and acrylic acid / acrylic acid salts or acrolein and vinyl acetate as monomers.

Also to be mentioned as further preferred builder substances are polymeric aminodicarboxylic acids, their salts or their precursor substances. Particularly preferred are polyaspartic acids or their salts and derivatives, of which it is disclosed in German patent application DE-A-195 40 086 that, in addition to cobuilder properties, they also have a bleach-stabilizing effect.

Other suitable builder substances are polyacetals, which are obtained by converting Dialdehydes with polyol carboxylic acids, which have 5 to 7 carbon atoms and at least 3 Have hydroxyl groups can be obtained. Preferred polyacetals are made from Dialdehydes such as glyoxal, glutaraldehyde, terephthalaldehyde and mixtures thereof and obtained from polyol carboxylic acids such as gluconic acid and / or glucoheptonic acid.

Other suitable organic builder substances are dextrins, for example oligomers or polymers of carbohydrates obtained by partial hydrolysis of starches can be. The hydrolysis can be carried out according to customary methods, for example acid-catalyzed or enzyme-catalyzed Procedures are carried out. They are preferably hydrolysis products with average molecular weights in the range of 400 to 500000 g / mol. There is one Polysaccharide with a dextrose equivalent (DE) in the range from 0.5 to 40, particularly preferred from 2 to 30, DE being a common measure of the reducing effect of a polysaccharide compared to dextrose, which have a DE of 100 owns. Both maltodextrins with a DE between 3 and 20 can be used and dry glucose syrups with a DE between 20 and 37 as well as so-called Yellow dextrins and white dextrins with higher molar masses in the range from 2000 to 30000 g / mol.

The oxidized derivatives of such dextrins are their reaction products with oxidizing agents which are capable of oxidizing at least one alcohol function of the saccharide ring to the carboxylic acid function. Such oxidized dextrins and processes for their preparation are known, for example, from European patent applications EP-A-0 232 202, EP-A-0 427 349, EP-A-0 472 042 and EP-A-0 542 496 and international patent applications WO 92 / 18542, WO 93/08251, WO 93/16110, WO 94/28030, WO 95/07303, WO 95/12619 and WO 95/20608 . An oxidized oligosaccharide according to German patent application DE-A-196 00 018 is also suitable. A product oxidized at C _{6 of} the saccharide ring can be particularly advantageous.

Oxydisuccinates and other derivatives of disuccinates are also preferred Ethylene diamine disuccinate are other suitable cobuilders. This is ethylenediamine-N, N'-disuccinate (EDDS) preferred in the form of its sodium or magnesium salts used. Glycerol disuccinates are also preferred in this context and glycerol trisuccinates. Suitable amounts are in zeolite and / or formulations containing silicate at 3 to 15% by weight.

Other useful organic cobuilders are, for example, acetylated hydroxycarboxylic acids or their salts, which may also be in lactone form and which contain at least 4 carbon atoms and at least one hydroxyl group and a maximum of two acid groups. Such cobuilders are described, for example, in international patent application WO 95/20029 .

Another class of substances with cobuilder properties are the phosphonates. These are, in particular, hydroxyalkane or aminoalkane phosphonates. Among the hydroxyalkane phosphonates is 1-hydroxyethane-1,1-diphosphonate (HEDP) of particular importance as a cobuilder. It is preferably used as the sodium salt the disodium salt being neutral and the tetrasodium salt being alkaline (pH 9). As Aminoalkane phosphonates preferably come from ethylenediaminetetramethylenephosphonate (EDTMP), diethylenetriaminepentamethylenephosphonate (DTPMP) and their higher Homologues in question. They are preferably in the form of neutral reactions Sodium salts, e.g. B. as the hexasodium salt of EDTMP or as the hepta and octa sodium salt the DTPMP. As a builder, the class becomes the Phosphonates preferably used HEDP. The aminoalkane phosphonates also have a pronounced heavy metal binding capacity. Accordingly, it can, in particular if the agents also contain bleach, aminoalkanephosphonates are preferred, use in particular DTPMP, or mixtures of the phosphonates mentioned use.

In addition, all compounds that are able to complex with To train alkaline earth ions are used as cobuilders.

In addition to the builders, there are in particular substances from the groups of surfactants Bleach, bleach activators, corrosion inhibitors and color and Fragrances important ingredients of detergents. Important representatives from the substance classes are described below.

Usually only surfactants are used in automatic dishwashing detergents low-foaming nonionic surfactants are used. Representatives from the groups of By contrast, anionic, cationic or amphoteric surfactants are of less importance. The detergent tablets according to the invention particularly preferably contain machine dishwashing non-ionic surfactants.

In particularly preferred embodiments of the present invention, the detergent tablets according to the invention contain nonionic surfactants, in particular nonionic surfactants from the group of the alkoxylated alcohols. The nonionic surfactants used are preferably alkoxylated, advantageously ethoxylated, in particular primary alcohols having preferably 8 to 18 carbon atoms and an average of 1 to 12 moles of ethylene oxide (EO) per mole of alcohol, in which the alcohol radical can be linear or preferably methyl-branched in the 2-position or can contain linear and methyl-branched radicals in the mixture, as are usually present in oxo alcohol radicals. However, alcohol ethoxylates with linear residues of alcohols of native origin with 12 to 18 carbon atoms, for example from coconut, palm, tallow fat or oleyl alcohol, and an average of 2 to 8 EO per mole of alcohol are particularly preferred. The preferred ethoxylated alcohols include, for example, C _12-14 alcohols with 3 EO or 4 EO, C _9-11 alcohol with 7 EO, C _13-15 alcohols with 3 EO, 5 EO, 7 EO or 8 EO, C _12-18 alcohols with 3 EO, 5 EO or 7 EO and mixtures thereof, such as mixtures of C _12-14 alcohol with 3 EO and C _12-18 alcohol with 5 EO. The degrees of ethoxylation given represent statistical averages, which can be an integer or a fraction for a specific product. Preferred alcohol ethoxylates have a narrow homolog distribution (narrow range ethoxylates, NRE). In addition to these nonionic surfactants, fatty alcohols with more than 12 EO can also be used. Examples include tallow fatty alcohol with 14 EO, 25 EO, 30 EO or 40 EO.

In addition, alkyl glycosides of the general formula RO (G) _x can also be used as further nonionic surfactants, in which R denotes a primary straight-chain or methyl-branched, in particular methyl-branched aliphatic radical having 8 to 22, preferably 12 to 18, C atoms and G is the symbol which stands for a glycose unit with 5 or 6 carbon atoms, preferably for glucose. The degree of oligomerization x, which indicates the distribution of monoglycosides and oligoglycosides, is any number between 1 and 10; x is preferably 1.2 to 1.4.

Another class of preferably used nonionic surfactants, which are used either as the sole nonionic surfactant or in combination with other nonionic surfactants, are alkoxylated, preferably ethoxylated or ethoxylated and propoxylated fatty acid alkyl esters, preferably with 1 to 4 carbon atoms in the alkyl chain, in particular fatty acid methyl esters, such as them are described, for example, in Japanese patent application JP 58/217598 or which are preferably produced by the process described in international patent application WO-A-90/13533 .

Also nonionic surfactants of the amine oxide type, for example N-cocoalkyl-N, N-dimethylamine oxide and N-tallow alkyl-N, N-dihydroxyethylamine oxide, and the Fatty acid alkanolamides can be suitable. The amount of these nonionic surfactants is preferably not more than that of the ethoxylated fatty alcohols, especially not more than half of it.

in der RCO für einen aliphatischen Acylrest mit 6 bis 22 Kohlenstoffatomen, R¹ für Wasserstoff, einen Alkyl- oder Hydroxyalkylrest mit 1 bis 4 Kohlenstoffatomen und [Z] für einen linearen oder verzweigten Polyhydroxyalkylrest mit 3 bis 10 Kohlenstoffatomen und 3 bis 10 Hydroxylgruppen steht. Bei den Polyhydroxyfettsäureamiden handelt es sich um bekannte Stoffe, die üblicherweise durch reduktive Aminierung eines reduzierenden Zuckers mit Ammoniak, einem Alkylamin oder einem Alkanolamin und nachfolgende Acylierung mit einer Fettsäure, einem Fettsäurealkylester oder einem Fettsäurechlorid erhalten werden können.Other suitable surfactants are polyhydroxy fatty acid amides of the formula (I),

in which RCO stands for an aliphatic acyl radical with 6 to 22 carbon atoms, R ¹ for hydrogen, an alkyl or hydroxyalkyl radical with 1 to 4 carbon atoms and [Z] for a linear or branched polyhydroxyalkyl radical with 3 to 10 carbon atoms and 3 to 10 hydroxyl groups. The polyhydroxy fatty acid amides are known substances which can usually be obtained by reductive amination of a reducing sugar with ammonia, an alkylamine or an alkanolamine and subsequent acylation with a fatty acid, a fatty acid alkyl ester or a fatty acid chloride.

in der R für einen linearen oder verzweigten Alkyl- oder Alkenylrest mit 7 bis 12 Kohlenstoffatomen, R¹ für einen linearen, verzweigten oder cyclischen Alkylrest oder einen Arylrest mit 2 bis 8 Kohlenstoffatomen und R² für einen linearen, verzweigten oder cyclischen Alkylrest oder einen Arylrest oder einen Oxy-Alkylrest mit 1 bis 8 Kohlenstoffatomen steht, wobei C_1-4-Alkyl- oder Phenylreste bevorzugt sind und [Z] für einen linearen Polyhydroxyalkylrest steht, dessen Alkylkette mit mindestens zwei Hydroxylgruppen substituiert ist, oder alkoxylierte, vorzugsweise ethoxylierte oder propoxylierte Derivate dieses Restes.The group of polyhydroxy fatty acid amides also includes compounds of the formula (I)

in which R represents a linear or branched alkyl or alkenyl radical having 7 to 12 carbon atoms, R ^{1 represents} a linear, branched or cyclic alkyl radical or an aryl radical having 2 to 8 carbon atoms and R ^{2 represents} a linear, branched or cyclic alkyl radical or an aryl radical or an oxyalkyl radical having 1 to 8 carbon atoms, C _1-4 -alkyl or phenyl radicals being preferred and [Z] being a linear polyhydroxyalkyl radical whose alkyl chain is substituted by at least two hydroxyl groups, or alkoxylated, preferably ethoxylated or propoxylated Derivatives of this rest.

[Z] is preferably obtained by reductive amination of a reduced sugar, for example glucose, fructose, maltose, lactose, galactose, mannose or xylose. The N-alkoxy- or N-aryloxy-substituted compounds can then, for example according to the teaching of international application WO-A-95/ 07331, be converted into the desired polyhydroxy fatty acid amides by reaction with fatty acid methyl esters in the presence of an alkoxide as catalyst.

In addition to the pure non-ionic surfactants, other substances can of course also be used from the group of ionic surfactants, for example anionic or cationic surfactants the machine dishwashing detergents according to the invention may be included.

Contain preferred detergent tablets within the scope of the present invention Surfactant (s), preferably nonionic surfactant (s), in amounts of 0.5 to 10% by weight, preferably from 0.75 to 7.5% by weight and in particular from 1.0 to 5% by weight, in each case based on the base molding.

Among the compounds which serve as bleaching agents and supply H ₂ O ₂ in water, sodium perborate tetrahydrate and sodium perborate monohydrate are of particular importance. Further bleaching agents which can be used are, for example, sodium percarbonate, peroxypyrophosphates, citrate perhydrates and H ₂ O ₂ -producing peracidic salts or peracids, such as perbenzoates, peroxophthalates, diperazelaic acid, phthaloiminoperic acid or diperdodecanedioic acid. Cleaning agents according to the invention can also contain bleaching agents from the group of organic bleaching agents. Typical organic bleaching agents are the diacyl peroxides, such as dibenzoyl peroxide. Other typical organic bleaching agents are peroxy acids, examples of which include alkyl peroxy acids and aryl peroxy acids. Preferred representatives are (a) the peroxybenzoic acid and its ring-substituted derivatives, such as alkylperoxybenzoic acids, but also peroxy-α-naphthoic acid and magnesium monoperphthalate, (b) the aliphatic or substituted aliphatic peroxyacids, such as peroxylauric acid, peroxystearic acid, ε-phthalimoxyhexanoic peroxycapene (PAP)], o-carboxybenzamido-peroxycaproic acid, N-nonenylamidoperadipic acid and N-nonenylamidopersuccinate, and (c) aliphatic and araliphatic peroxydicarboxylic acids, such as 1,12-diperoxycarboxylic acid, 1,9-diperoxyazelaic acid, diperocysoxybramic acid, diperacid acid, diperoxic acid, diperacid acid, 2-decyldiperoxybutane-1,4-diacid, N, N-terephthaloyl-di (6-aminopercapronic acid) can be used.

As a bleach in the detergent tablets according to the invention for the machine Dishwashing can also use chlorine or bromine-releasing substances. Suitable chlorine or bromine releasing materials include, for example heterocyclic N-bromo- and N-chloramides, for example trichloroisocyanuric acid, Tribromo isocyanuric acid, dibromo isocyanuric acid and / or dichloroisocyanuric acid (DICA) and / or their salts with cations such as potassium and sodium. Hydantoin compounds such as 1,3-dichloro-5,5-dimethylhydanthoin are also suitable.

The bleaches are usually used in machine dishwashing detergents in amounts of 1 up to 30% by weight, preferably from 2.5 to 20% by weight and in particular from 5 to 15% by weight, each based on the agent used. Within the scope of the present invention the proportions mentioned are based on the weight of the base molding.

Bleach activators that support the action of the bleach can also Be part of the base molding. Known bleach activators are compounds that contain one or more N- or O-acyl groups, such as substances from the class of Anhydrides, the esters, the imides and the acylated imidazoles or oximes. examples are Tetraacetylethylenediamine TAED, Tetraacetylmethylenediamine TAMD and Tetraacetylhexylenediamine TAHD, but also pentaacetylglucose PAG, 1,5-diacetyl-2,2-dioxo-hexahydro-1,3,5-triazine DADHT and isatoic anhydride ISA.

Bleach activators which can be used are compounds which, under perhydrolysis conditions, give aliphatic peroxocarboxylic acids having preferably 1 to 10 C atoms, in particular 2 to 4 C atoms, and / or optionally substituted perbenzoic acid. Substances are suitable which carry O- and / or N-acyl groups of the number of carbon atoms mentioned and / or optionally substituted benzoyl groups. Multi-acylated alkylenediamines, in particular tetraacetylethylene diamine (TAED), acylated triazine derivatives, in particular 1,5-diacetyl-2,4-dioxohexahydro-1,3,5-triazine (DADHT), acylated glycolurils, in particular tetraacetylglycoluril (TAGU), N- Acylimides, in particular N-nonanoylsuccinimide (NOSI), acylated phenolsulfonates, in particular n-nonanoyl- or isononanoyloxybenzenesulfonate (n- or iso-NOBS), carboxylic acid anhydrides, in particular phthalic anhydride, acylated polyhydric alcohols, in particular triacetyloxy, 2,5-acetiacetyl, ethylene glycol 2,5-dihydrofuran, n-methyl-morpholinium-acetonitrile-methyl sulfate (MMA), and the enol esters known from German patent applications DE 196 16 693 and DE 196 16 767 as well as acetylated sorbitol and mannitol or their mixtures (SORMAN), acylated sugar derivatives , in particular pentaacetyl glucose (PAG), pentaacetyl fructose, tetraacetylxylose and octaacetyl lactose as well as acetylated, optionally N-alkylated gluc amine and gluconolactone, and / or N-acylated lactams, for example N-benzoylcaprolactam. Hydrophilically substituted acylacetals and acyllactams are also preferably used. Combinations of conventional bleach activators can also be used. The bleach activators are usually used in machine dishwashing detergents in amounts of 0.1 to 20% by weight, preferably 0.25 to 15% by weight and in particular 1 to 10% by weight, based in each case on the detergent. In the context of the present invention, the proportions mentioned relate to the weight of the base molding.

In addition to the conventional bleach activators or in their place, too so-called bleaching catalysts can be incorporated into the basic tablets. With these Fabrics are bleach-enhancing transition metal salts or Transition metal complexes such as Mn, Fe, Co, Ru or Mo salt complexes or carbonyl complexes. Also Mn, Fe, Co, Ru, Mo, Ti, V and Cu complexes with N-containing tripod ligands and Co, Fe, Cu and Ru amine complexes can be used as bleaching catalysts.

Bleach activators from the group of multi-acylated alkylenediamines are preferred, especially tetraacetylethylenediamine (TAED), N-acylimides, especially N-nonanoylsuccinimide (NOSI), acylated phenol sulfonates, especially n-nonanoyl or Isononanoyloxybenzenesulfonate (n- or iso-NOBS), n-methyl-morpholinium-acetonitrile-methyl sulfate (MMA), preferably in amounts of up to 10% by weight, in particular 0.1% by weight up to 8% by weight, particularly 2 to 8% by weight and particularly preferably 2 to 6% by weight based on the total agent used.

Bleach-enhancing transition metal complexes, in particular with the central atoms Mn, Fe, Co, Cu, Mo, V, Ti and / or Ru, preferably selected from the group of manganese and / or cobalt salts and / or complexes, particularly preferably the cobalt (ammin) complexes, the cobalt (acetate) complexes, the cobalt (carbonyl) complexes, the chlorides of cobalt or manganese, of manganese sulfate in usual amounts, preferably in an amount up to 5% by weight, in particular from 0.0025% by weight to 1% by weight and particularly preferably from 0.01% by weight to 0.25% by weight, in each case based on the total Means used. But in special cases, more bleach activator can be used become.

Of course, the base molding can also contain enzymes, which means that conventional enzyme release and action is achieved by the Enzyme release and action from the region according to the invention is supported. Such detergent tablets have a "booster enzyme effect". The enzymes to be used optionally in the base molding are included preferably commercially available solid enzyme preparations.

Enzymes in the base tablets come in particular from the classes of Hydrolases such as proteases, esterases, lipases or lipolytic enzymes, Amylases, glycosyl hydrolases and mixtures of the enzymes mentioned in question. All these Hydrolases help to remove stains such as protein, fat or starchy stains. Oxidoreductases can also be used for bleaching become. Bacterial strains or fungi such as Bacillus are particularly suitable subtilis, Bacillus licheniformis, Streptomyceus griseus, Coprinus Cinereus and Humicola insolens as well as enzymatic derived from their genetically modified variants Agents. Proteases of the subtilisin type and in particular are preferred Proteases obtained from Bacillus lentus are used. Are there Enzyme mixtures, for example from protease and amylase or protease and lipase or lipolytically active enzymes or from protease, amylase and lipase or lipolytic enzymes or protease, lipase or lipolytic Enzymes, but especially protease and / or lipase-containing mixtures or Mixtures with lipolytically active enzymes of particular interest. examples for such lipolytic enzymes are the well-known cutinases. Peroxidases too or oxidases have been found to be suitable in some cases. To the appropriate ones Amylases include in particular alpha-amylases, iso-amylases, pullulanases and Pectinases.

The enzymes can be adsorbed on carriers or embedded in coating substances in order to protect them against premature decomposition. The proportion of enzymes, enzyme mixtures or enzyme granules can, for example, about 0.1 to 5 wt .-%, preferably 0.5 to be about 4.5% by weight. Preferred in the context of the present invention Detergent tablets are characterized in that the base tablet Contains protease and / or amylase.

Because the detergent tablets according to the invention can contain the enzyme (s) in two fundamentally different areas, tablets with a very precisely defined enzyme release and action can be provided. The table below gives an overview of possible enzyme distributions in detergent tablets according to the invention: Basic tablet Shell material / enzyme Region - amylase - protease - lipase - Amylase + protease - Amylase + lipase - Protease + lipase - Amylase + protease + lipase amylase amylase protease amylase Amylase + protease amylase amylase protease protease protease Amylase + protease protease amylase Amylase + protease protease Amylase + protease Amylase + protease Amylase + protease lipase amylase Amylase + lipase amylase Protease + lipase amylase Amylase + protease + lipase amylase lipase protease Amylase + lipase protease Protease + lipase protease Amylase + protease + lipase protease lipase Amylase + protease Amylase + lipase Amylase + protease Protease + lipase Amylase + protease Amylase + protease + lipase Amylase + protease

Dyes and fragrances can be used in the dishwasher detergents according to the invention Both in the base molding and in the region can be added to the aesthetic To improve the impression of the resulting products and the consumer in addition to the Performance a visually and sensory "typical and distinctive" product for To make available. Individual as perfume oils or fragrances Fragrance compounds, e.g. synthetic products of the ester, ether, Aldehydes, ketones, alcohols and hydrocarbons can be used. Fragrance compounds of the ester type are e.g. benzyl acetate, Phenoxyethyl isobutyrate, p-tert-butylcyclohexyl acetate, linalyl acetate, Dimethylbenzylcarbinylacetate, phenylethyl acetate, linalyl benzoate, benzyl formate, Ethyl methylphenylglycinate, allylcyclohexylpropionate, styrallylpropionate and Benzyl salicylate. The ethers include, for example, benzyl ethyl ether and the aldehydes e.g. the linear alkanals with 8-18 C atoms, citral, citronellal, Citronellyloxyacetaldehyde, Cyclamenaldehyde, Hydroxycitronellal, Lilial and Bourgeonal, to the ketones e.g. the Jonone, α-Isomethylionon and Methylcedrylketon, to the Alcohols anethole, citronellol, eugenol, geraniol, linalool, phenylethyl alcohol and Terpineol, the hydrocarbons mainly include terpenes such as limonene and pinene. However, mixtures of different fragrances are preferably used, which together create an appealing fragrance. Such perfume oils can also contain natural fragrance mixtures as they are accessible from plant sources, e.g. Pine, citrus, jasmine. Patchouly, rose or ylang-ylang oil. Also suitable are muscatel, sage oil, chamomile oil, clove oil, lemon balm oil, mint oil, cinnamon leaf oil, Linden flower oil, juniper berry oil, vetiver oil, olibanum oil, galbanum oil and labdanum oil as well as orange blossom oil, neroliol, orange peel oil and sandalwood oil.

The fragrances can be incorporated directly into the cleaning agents according to the invention , but it can also be advantageous to apply the fragrances to carriers.

In order to improve the aesthetic impression of the agents according to the invention, it can (or Parts of it) can be colored with suitable dyes. Preferred dyes whose Choices of no difficulty for the expert have a high Storage stability and insensitivity to the other ingredients of the agent and against light as well as no pronounced substantivity towards those with the means too treating substrates such as glass, ceramics or plastic dishes to avoid them to stain.

The detergent tablets according to the invention can in particular in Basic molded body to protect the wash ware or the machine corrosion inhibitors contain, especially silver protection in the field of mechanical Dishwashing have a special meaning. The known ones can be used State of the art substances. In general, silver protection agents in particular selected from the group of triazoles, benzotriazoles, bisbenzotriazoles, Aminotriazoles, the alkylaminotriazoles and the transition metal salts or complexes be used. Benzotriazole and / or are particularly preferably to be used Alkylaminotriazole. You will also often find it in detergent formulations agents containing active chlorine, which significantly reduce the corrosion of the silver surface can. Chlorine-free cleaners contain oxygen and nitrogen in particular organic redox-active compounds, such as di- and trihydric phenols, e.g. B. Hydroquinone, pyrocatechol, hydroxyhydroquinone, gallic acid, phloroglucin, pyrogallol or derivatives of these classes of compounds. Also salt and complex inorganic Compounds such as salts of the metals Mn, Ti, Zr, Hf, V, Co and Ce are often found Use. The transition metal salts selected from are preferred the group of manganese and / or cobalt salts and / or complexes, particularly preferred the cobalt (ammin) complexes, the cobalt (acetate) complexes, the cobalt (carbonyl) complexes, the chlorides of cobalt or manganese and manganese sulfate. Likewise Zinc compounds can be used to prevent corrosion on the wash ware.

In the production of the basic shaped bodies, one is not restricted to the fact that only one particulate premix is pressed into a shaped body. Rather, the Design the base molding so that one in a known manner multilayer Manufacture molded articles by preparing two or more premixes, one on top of the other be pressed. In this case, the premix which is filled in first is either not or only slightly pre-pressed to a smooth and parallel to the top of the molded body top get, and after filling the second premix to the finished molded article final compression. In the case of three-layer or multi-layer molded articles, each premix is added a further pre-compression before adding the last premix Shaped body is finally pressed.

Due to the increasing technical effort, in practice are maximum two-layer moldings preferred, i.e. detergent tablets are preferred, in which the base tablet is a two-layer tablet. Already with this Intermediate steps in the method according to the invention can be determined from the division Ingredients on the individual layers benefits can be achieved.

For example, detergent tablets are preferred in which one layer of the Base molding one or more bleaches and the other layer one or more Contains enzymes. This separation of bleach and enzymes is not the only advantage bring, also the separation of bleach and optionally used Bleach activators can be advantageous so that the invention Detergent tablets are preferred in which one layer of the base tablet one or more bleaches and the other one or more bleach activators.

After the description of the base molding, the description of other ingredients of the region, of which the coating substance in addition to the liquid Enzyme preparations are mandatory. Preferred coating substances in the region have a melting range of 45 ° C to 75 ° C. Through this melting range an advantage in the usual cleaning programs in dishwashers Enzyme release guaranteed. It is within the scope of the present invention of Advantage if the coating substance is water-soluble.

Particularly preferred are detergent tablets, in which the coating substance Region at least one substance from the group of polyethylene glycols (PEG) and / or Contains polypropylene glycols (PPG), with polyethylene glycols with molecular weights between 1500 and 36,000 preferred, those with molecular weights from 2000 to 6000 particularly preferred and those with molecular weights of 3000 to 5000 are particularly preferred.

genügen, wobei n Werte zwischen 10 und 2000 annehmen kann. Bevorzugte PPG weisen Molmassen zwischen 1000 und 10.000, entsprechend Werten von n zwischen 17 und ca. 170, auf.Here, detergent tablets are particularly preferred which contain propylene glycols (PPG) and / or polyethylene glycols (PEG) as the only coating substance in the region. Polypropylene glycols (abbreviation PPG) which can be used according to the invention are polymers of propylene glycol which have the general formula III

are sufficient, where n can have values between 10 and 2000. Preferred PPGs have molar masses between 1000 and 10,000, corresponding to values of n between 17 and approximately 170.

Polyethylene glycols (abbreviation PEG) which can preferably be used according to the invention are polymers of ethylene glycol which have the general formula IV H- (O-CH ₂ -CH ₂ ) _n -OH are sufficient, where n can have values between 20 and approx. 1000. The preferred molecular weight ranges mentioned above correspond to preferred ranges of the value n in formula IV from approximately 30 to approximately 820 (exactly: from 34 to 818), particularly preferably from approximately 40 to approximately 150 (precisely: from 45 to 136) and in particular from about 70 to about 120 (exactly: from 68 to 113).

In addition to the essential components, the region can contain wrapping material and Liquid enzyme preparation contain further active ingredients and / or auxiliary substances, for example those from the groups of anti-settling agents, suspended agents, anti-floating agents, Thixotropic agents and dispersing agents. So certain according to the invention Detergent tablets in the region further auxiliaries from the group of Anti-settling agents, floating agents, anti-floating agents, thixotropic agents and Dispersing agents in amounts of 0.5 to 8.0 wt .-%, preferably from 1.0 to 5.0 % By weight, and in particular from 1.5 to 3.0% by weight, in each case based on the region, contain.

The region also contains emulsifiers from the group of fatty alcohols, fatty acids, Polyglycerol esters and / or polyoxyalkylene siloxanes in amounts of 1 to 20% by weight, preferably from 2 to 15% by weight, and particularly preferably from 2.5 to 10% by weight, in each case based on the region, is possible according to the invention.

Preferred detergent tablets are, however, characterized in that the Region except the envelope material (s) and the components of the Liquid enzyme preparations contains no other ingredients.

The detergent tablets according to the invention can be different Because of manufacture. So it is possible, for example, by known Tableting processes to produce moldings which have a cavity with a Enamel dispersion of coating substance, liquid enzyme preparation (s) and optional Ingredients is filled. In this way, point or Tray tablets can be produced. Of course, the melt dispersion can also be applied to the one side or the entire surface of the previously pressed molded body applied be, for which coating methods known to the person skilled in the art, such as spraying or Immersion of the molded body in the melt dispersion are used. Possible is also to transfer the basic molded body into a die and the melt dispersion pour on one side of the molded body, where it solidifies in the die. In this way multilayer tablets can be produced in which the region has the shape of a layer.

Another process route is the melt dispersion in the solidification area to process the melt shaping, so that particles are obtained which the Have composition of the melt dispersion. These particles can tabletting premixes are mixed and in this way a variety of Form homogeneously over the molded body regions. But it is also possible that Particles, which may be in the form of flakes, pearls, strands, etc., as one To use premix, the compression of which in the context of a known Multi-layer tableting a layer with the composition of the melt dispersion supplies.

a) Verpressen eines teilchenförmigen Vorgemischs zu Formkörpem, die eine Kavität aufweisen, in an sich bekannter Weise,

b) Herstellung einer Schmelzdispersion aus einer Hüllsubstanz, die einen Schmelzpunkt oberhalb von 30°C aufweist und einer oder mehreren in ihr dispergierten flüssigen Enzymzubereitung(en),

c) Befüllen der Formkörper aus Schritt a) mit der Schmelzdispersion aus Schritt b) bei Temperaturen oberhalb des Schmelzpunkts der Hüllsubstanz,

d) Abkühlen und optionale Nachbehandlung der befüllten Reinigungsmittel formkörper

gekennzeichnet ist.Both of the above-outlined production methods for the detergent tablets according to the invention are further objects of the present invention, so that another object of the present invention is a method for producing multiphase detergent tablets, which comprises the steps:

a) pressing a particulate premix into shaped bodies which have a cavity in a manner known per se,

b) preparation of a melt dispersion from a coating substance which has a melting point above 30 ° C. and one or more liquid enzyme preparation (s) dispersed in it,

c) filling the moldings from step a) with the melt dispersion from step b) at temperatures above the melting point of the coating substance,

d) cooling and optional post-treatment of the filled detergent tablets

is marked.

a) Herstellung einer Schmelzdispersion aus einer Hüllsubstanz, die einen Schmelzpunkt oberhalb von 30°C aufweist und einer oder mehreren in ihr dispergierten flüssigen Enzymzubereitung(en),

b) formgebende Verarbeitung der Schmelzdispersion im Erstarrungsbereich der Schmelze zu einer teilchenförmigen Zusammensetzung,

c) optionales Abmischen der in Schritt b) gebildeten Partikel mit weiteren teilchenförmigen Inhaltsstoffen von Reinigungsmitteln,

d) Verpressen der in Schritt b) oder c) gebildeten Vorgemische zu Formkörpern oder Bereichen davon

umfaßt.Another object of the present invention is the second process route, namely a process for the production of multi-phase detergent tablets, which comprises the steps:

a) preparation of a melt dispersion from a coating substance which has a melting point above 30 ° C. and one or more liquid enzyme preparation (s) dispersed in it,

b) shaping processing of the melt dispersion in the solidification area of the melt into a particulate composition,

c) optional mixing of the particles formed in step b) with further particulate ingredients of cleaning agents,

d) pressing the premixes formed in step b) or c) into shaped bodies or regions thereof

includes.

In the first method according to the invention, a melt dispersion is produced in step b) the ingredients of the region described above. In the second This is the method step a) according to the invention. Regarding more preferred Amounts and certain substances of the coating substance and the liquid Enzyme preparations can refer to the above explanations for the invention Detergent tablets are referred. Also with regard to the composition the basic tablet in the first method according to the invention applies analogously to the above Said.

First method variants according to the invention are preferred in which the step a) pressed premix builder in amounts of from 20 to 80% by weight, preferably from 25 to 75% by weight and in particular from 30 to 70% by weight, in each case based on the premix, contains. Another preferred embodiment of the first-mentioned method provides that the particulate premix surfactant (e) pressed in step a), preferably nonionic surfactant (s), in amounts from 0.5 to 10% by weight, preferably from 0.75 to 7.5% by weight and in particular from 1.0 to 5% by weight, in each case based on the premix, contains.

The premix can, as described above for the basic shaped body described, be composed of different substances. Independently on the composition of the premixes to be compressed in process step a) physical parameters of the premixes can be selected so that advantageous Shaped body properties result.

Thus, in preferred variants of the first method according to the invention, the in Step a) compressed particulate premixes bulk densities above 600 g / l, preferably above 700 g / l and in particular above 800 g / l.

The particle size in the premixes to be pressed can also be obtained advantageous molded body properties can be set. In preferred variants for the first method according to the invention has the particulate pressed in step a) Premix a particle size distribution in which less than 10% by weight, preferably less than 7.5% by weight and in particular less than 5% by weight of the Particles are larger than 1600 µm or smaller than 200 µm. Here are closer Particle size distributions more preferred. Particularly advantageous process variants are characterized in that the particulate pressed in step a) Premix has a particle size distribution in which more than 30% by weight, preferably more than 40% by weight and in particular more than 50% by weight of the particles have a particle size between 600 and 1000 microns.

When performing method step a), the first method according to the invention not limited to the fact that only a particulate premix to one Molded body is pressed. Rather, method step a) can also be done in this regard expand that one produces in a manner known per se multilayered articles by two or more premixes are prepared which are pressed together. in this connection the pre-filled mixture is slightly pre-pressed to create a smooth and parallel to the Get molded bottom trending top, and after filling the second Premixed to the finished molded article. With three or more layers Moldings are precompressed after each addition of premix after the addition of the last premix, the molding is finally pressed. Preferably the cavity described above in the base molding a trough, so that preferred Embodiments of the first method according to the invention characterized are that in step a) multilayered molded articles which have a trough in itself be made in a known manner by several different particulate Premixes are pressed together.

This method variant is also analogous to the above statements Processes preferred, in which in step a) two-layer molded body, which is a trough have, are produced by two different particulate premixes are pressed together, one of which has one or more bleaches and the other contains one or more enzymes. Again, analog methods are also preferred, in which, in step a), two-layer molded articles which have a depression are produced are pressed together by two different particulate premixes of which one or more bleaches and the other one or more Contains bleach activators. Here, too, methods are preferred which are thereby are characterized in that the base molding protease and / or produced in step a) Contains amylase.

Regardless of whether the melt dispersion in a cavity of a previously made Shaped body is introduced (first process variant), or whether the dispersion in Processes that solidify the solidification area are methods according to the invention preferred, in which the melt dispersion produced in step b) consists of 40 to 99.5% by weight, preferably 50 to 97.5% by weight, particularly preferably 60 to 95% by weight and in particular 70 to 90 wt .-% of one or more coating substance (s), the one Has / have melting point above 30 ° C., 0.5 to 60% by weight, preferably 1 up to 40% by weight, particularly preferably 2.5 to 30% by weight and in particular 5 to 25% by weight one or more liquid dispersed in the shell substance (s) Enzyme preparation (s) and 0 to 20 wt .-%, preferably 0 to 15 wt .-%, particularly preferably 0 to 10% by weight and in particular 0 to 5% by weight optionally further auxiliary and / or active ingredients.

In the case of the second method according to the invention, the shaping processing takes place in step b) by granulating, compacting, pelleting, extruding or tableting.

The granules, compactates, pellets, prills, extrudates, beads, Dandruff, flakes, tablets, etc. can be made by conventional tableting methods larger areas are pressed. Here, direct compression is possible or compression after mixing with further particles, for example further ones powdery or granular ingredients of detergents. Further Embodiments of the second method according to the invention therefore provide that the in Step b) particles formed with further particulate ingredients of Detergents are mixed into a pre-mix that becomes a single-layer Molded body is pressed.

However, it is preferred that the region is a coherent region and not from many smaller regions. In preferred embodiments of the The second method according to the invention therefore becomes the particles formed in step b) without further additives as a premix for the known preparation of a Two-layer tablet used.

As already mentioned above, are independent of the type of the invention Process variants are preferred in which the coating substance of the melt dispersion at least one substance from the group of polyethylene glycols (PEG) and / or Contains polypropylene glycols (PPG), with polyethylene glycols with molecular weights between 1500 and 36,000 preferred, those with molecular weights from 2000 to 6000 particularly preferred and those with molecular weights of 3000 to 5000 are particularly preferred and in which the melt dispersion is one or more liquid amylase preparations and / or contains one or more liquid protease preparations.

a) einer oder mehreren Hüllsubstanz(en), die einen Schmelzpunkt oberhalb von 30°C aufweist/aufweisen,

b) einer oder mehreren in der/den Hüllsubstanz(en) dispergierten flüssigen Enzymzubereitung(en) sowie

c) optional weiteren Hilfs- und/oder Wirkstoffen

in Reinigungsmittelformkörpern für das maschinelle GeschirrspülenBecause of the region of coating substance and liquid enzyme preparation contained in them, the detergent tablets according to the invention have clear advantages over previous products when used in dishwashers. Another object of the present invention is therefore the use of solidified melt dispersions

a) one or more coating substance (s) which have a melting point above 30 ° C.,

b) one or more liquid enzyme preparation (s) dispersed in the coating substance (s) and

c) optionally further auxiliaries and / or active ingredients

in detergent tablets for automatic dishwashing

In particular, the use of in polyethylene glycols with molecular weights from 1500 to 36,000, preferably from 2,000 to 6,000 and in particular from 3,000 to 5,000 dispersed enzymes in detergent tablets for the machine Dishwashing is preferred.

a) einer oder mehreren Hüllsubstanz(en), die einen Schmelzpunkt oberhalb von 30°C aufweist/aufweisen,

b) einer oder mehreren in der/den Hüllsubstanz(en) dispergierten flüssigen Enzymzubereitung(en) sowie

c) optional weiteren Hilfs- und/oder Wirkstoffen

zur schnellen und langanhaltenden Freisetzung von Enzymen aus Reinigungsmittelformkörpern, welche diese erstarrten Dispersionen enthalten. As the examples below show, the region releases the enzymes faster and for a longer time than previously used detergent tablets. Another object of the present invention is therefore the use of solidified melt dispersions

a) one or more coating substance (s) which have a melting point above 30 ° C.,

b) one or more liquid enzyme preparation (s) dispersed in the coating substance (s) and

c) optionally further auxiliaries and / or active ingredients

for the rapid and long-term release of enzymes from detergent tablets which contain these solidified dispersions.

Examples: Manufacture of molded bodies:

By pressing two different premixes, two differently shaped rectangular bodies were produced, which had a trough in the form of a semi-ellipse. The following table shows the composition (in% by weight, based on the respective premix) of the two premixes and thus of the two different moldings: Premix 1
Tablet containing protease Premix 2
Protease-free tablet sodium 16.5 18.0 sodium tripolyphosphate 50.0 50.0 sodium disilicate 5.0 5.0 polycarboxylate 5.0 5.0 HEDP 1.0 1.0 sodium 10.0 10.0 tetraacetylethylenediamine 2.0 2.0 C ₁₂ fatty alcohol with 3 EO 2.0 2.0 Protease (BLAP® 200 S) 1.5 - Amylase (Duramyl® 60 T) 2.0 2.0 rest 5.0 5.0

In addition, melt dispersions of the following composition were produced: Melt dispersion 1 Melt dispersion 2 Protease (BLAP® S 260 LD) 15.0 - Amylase (Ternamyl® 300 L) - 15.0 PEG 4000 85.0 85.0

The protease-free base tablet 2 was filled with the melt dispersion 1 and delivered the molded body E1 according to the invention, wherein the base tablet before filling 24 g and weighed 25 g after filling. The protease-containing base tablet 1 was used analogously filled the melt dispersion 1, which gave the molded body E2 according to the invention.

The cleaning performance of the shaped bodies E1 and E2 according to the invention was assessed against the unfilled basic shaped bodies 2 (V1) and 1 (V2). Dirty dishes were used in a 55 ° C program with 16 ° d water hardness in the main wash in a Miele G 590 with a universal program. The table below shows the cleaning performance of the individual moldings on different protease-sensitive soils. It should be noted here that the unfilled molded article V1 is free of proteases, while the unfilled molded article V2 contains protease in the basic molded article. The molded body E1 according to the invention contains the protease only in the cast core (in terms of quantity less protease activity than V2), while the molded body E2 contains protease both in the base molded body and in the core. The cleaning performance of the agents on the soiling was carried out visually by experts and graded, with the rating "0" meaning no cleaning on a scale of 0-10 and "10" meaning complete removal of the stains. The results of the cleaning tests are summarized in the table below. For better clarity, a content of protease in the base molding is marked with "B", a content of protease in the "enzyme core" with "K". Protease in ./. B K K + B V1 V2 E1 E2 Minced meat on glass (burnt) - 8.0 - 9.0 Minced meat on porcelain (dried) - 9.0 - 10.0 Egg yolk (dried) 1.0 8.9 8.0 10.0 Egg milk (dried) 1.0 10.0 10.0 10.0

To further clarify the "booster effect" of the enzyme core, the molded bodies V2 and E2 were compared in a 40 ° C program: V2 E2 Minced meat on glass (burnt) 5.2 6.0 Minced meat on porcelain (dried) 5.7 6.5 Egg yolk (dried) 3.2 5.8 Egg milk (dried) 5.0 8.8

The results show that the sole presence of protease in an "enzyme core" is equivalent to an increased dose of protease in the basic body with certain soiling (comparison E1-V2). Here the same performance is achieved with less protease. If the protease is used both in the base molding and in the "enzyme core", the cleaning performance on all soiling can be significantly improved even with low-temperature programs.
Analogous effects can be shown on soils sensitive to amylase. For this purpose, the base molding 2 was filled with the melt dispersion 2 (E3) and the performance compared to an unfilled base molding 2 (V3). V3 E3 40 ° C 55 ° C 40 ° C 55 ° C Oatmeal (dried) 7.2 8.2 8.4 9.5 Rice starch (dried out) 2.8 - 8.3 - Starch mix (dried) 5.7 10.0 9.1 10.0 spaghetti 7.0 - 7.6 -

Here too it can be seen that the cleaning performance on all soiling also Low temperature programs can be significantly improved if the amylase both in Base moldings as well as in the "enzyme core" is used.

release kinetics:

In an experiment for enzyme release, the protease-containing molded body 1 (V4) was compared with a protease-free molded body 2, which contained the analogous amount of protease in the form of an "enzyme core" of the above composition (85% PEG, 15% protease) ( E4). Both moldings were subjected to a main wash in a dishwasher, the enzyme activity being measured as a function of time. The results are shown in the table below: Time [min] 2.5 5 6.75 7.5 10 15 20 25 % Protease activity V4 2 5 10 25 100 60 10 6 % Protease activity E4 0 60 100 80 70 70 66 50

The table shows that the shaped body according to the invention already has the maximum activity reached after 6.75 minutes, while the comparative example takes 10 minutes. In addition, the enzyme activity in the cleaning liquor remains throughout Main wash at a high level, while in the comparative example it is shortly after the maximum drops drastically.

Claims (33)

1. Detergent tablet for machine dishwashing, comprising builders, enzymes, and optionally further detergent ingredients, characterized in that, in and/or on a basic tablet, one region of the tablet consists of

   a) one or more coating substance(s) which has/have a melting point above 30°C,

   b) one or more liquid enzyme preparation(s) dispersed in the coating substance(s), and

   c) optionally further auxiliaries and/or active ingredients.
2. Detergent tablet according to Claim 1, characterized in that the region of the tablet, in each case based on the region, consists of

   a) 40 to 99.5% by weight, preferably 50 to 97.5% by weight, particularly preferably 60 to 95% by weight and in particular 70 to 90% by weight of one or more coating substance(s) which has/have a melting point above 30°C,

   b) 0.5 to 60% by weight, preferably 1 to 40% by weight, particularly preferably 2.5 to 30% by weight and in particular 5 to 25% by weight, of one or more liquid enzyme preparation(s) dispersed in the coating substance(s), and

   c) 0 to 20% by weight, preferably 0 to 15% by weight, particularly preferably 0 to 10% by weight and in particular 0 to 5% by weight, of optionally further auxiliaries and/or active ingredients.
3. Detergent tablet according to either Claim 1 or 2, characterized in that the region has the shape of an inlay, a core or a layer.
4. Detergent tablet according to one of Claims 1 to 3, characterized in that the basic tablet comprises builders in amounts of from 20 to 80% by weight, preferably from 25 to 75% by weight and in particular from 30 to 70% by weight, in each case based on the basic tablet.
5. Detergent tablet according to one of Claims 1 to 4, characterized in that the basic tablet comprises surfactant(s), preferably nonionic surfactant(s), in amounts of from 0.5 to 10% by weight, preferably from 0.75 to 7.5% by weight and in particular from 1.0 to 5% by weight, in each case based on the basic tablet.
6. Detergent tablet according to one of Claims 1 to 5, characterized in that the basic tablet is a two-layer tablet.
7. Detergent tablet according to Claim 6, characterized in that one layer of the basic tablet comprises one or more bleaches, and the other layer comprises one or more enzymes.
8. Detergent tablet according to either Claim 6 or 7, characterized in that one layer of the basic tablet comprises one or more bleaches, and the other comprises one or more bleach activators.
9. Detergent tablet according to one of Claims 1 to 8, characterized in that the basic tablet comprises protease and/or amylase.
10. Detergent tablet according to one of Claims 1 to 9, characterized in that the coating substance of the region has a melting range from 45°C to 75°C.
11. Detergent tablet according to one of Claims 1 to 10, characterized in that the coating substance of the region comprises at least one substance from the group of polyethylene glycols (PEG) and/or polypropylene glycols (PPG), preference being given to polyethylene glycols with molar masses between 1500 and 36 000, those with molar masses of from 2000 to 6000 being particularly preferred and those with molar masses of from 3000 to 5000 being especially preferred.
12. Detergent tablet according to one of Claims 1 to 11, characterized in that the region comprises one or more liquid amylase preparations and/or one or more liquid protease preparations.
13. Detergent tablet according to one of Claims 1 to 12, characterized in that the region comprises further auxiliaries from the group of antisettling agents, suspension agents, antiflotation agents, thixotropic agents and dispersion auxiliaries in amounts of from 0.5 to 8.0% by weight, preferably from 1.0 to 5.0% by weight and in particular from 1.5 to 3.0% by weight, in each case based on the region.
14. Detergent tablet according to one of Claims 1 to 13, characterized in that the region additionally comprises emulsifiers from the group of fatty alcohols, fatty acids, polyglycerol esters and/or polyoxyalkylene siloxanes in amounts of from 1 to 20% by weight, preferably from 2 to 15% by weight, and particularly preferably from 2.5 to 10% by weight, in each case based on the region.
15. Detergent tablet according to one of Claims 1 to 12, characterized in that the region comprises no further ingredients apart from the coating material(s) and the constituents of the liquid enzyme preparations.
16. Process for the preparation of multiphase detergent tablets, characterized by the steps:

    a) compression of a particulate premix to give tablets which have a cavity in a manner known per se,

    b) preparation of a melt dispersion of a coating substance which has a melting point above 30°C and one or more liquid enzyme preparation(s) dispersed therein,

    c) filling of the tablet from step a) with the melt dispersion from step b) at temperatures above the melting point of the coating substance,

    d) cooling and optionally after-treatment of the filled detergent tablets.
17. Process for the preparation of multiphase detergent tablets, characterized by the steps:

    a) preparation of a melt dispersion of a coating substance which has a melting point above 30°C and one or more liquid enzyme preparation(s) dispersed therein,

    b) shaping processing of the melt dispersion in the solidification range of the melt to give a particulate composition,

    c) optionally mixing of the particles formed in step b) with further particulate ingredients of detergents,

    d) compression of the premixes formed in step b) or c) to give tablets or areas thereof.
18. Process according to Claim 16, characterized in that the premix compressed in step a) comprises builders in amounts of from 20 to 80% by weight, preferably from 25 to 75% by weight and in particular from 30 to 70% by weight, in each case based on the premix.
19. Process according to either Claim 16 or 18, characterized in that the particulate premix compressed in step a) comprises surfactant(s), preferably nonionic surfactant(s), in amounts of from 0.5 to 10% by weight, preferably from 0.75 to 7.5% by weight and in particular from 1.0 to 5% by weight, in each case based on the premix.
20. Process according to one of Claims 16, 18 or 19, characterized in that the particulate premix compressed in step a) has a bulk density above 600 g/l, preferably above 700 g/l and in particular above 800 g/l.
21. Process according to one of Claims 16, 18 to 20, characterized in that the particulate premix compressed in step a) has a particle size distribution in which fewer than 10% by weight, preferably fewer than 7.5% by weight and in particular fewer than 5% by weight, of the particles are larger than 1600 µm or smaller than 200 µm, it being particularly preferred that more than 30% by weight, preferably more than 40% by weight and in particular more than 50% by weight, of the particles have a particle size between 600 and 1000 µm.
22. Process according to one of Claims 16, 18 to 21, characterized in that, in step a), multilayer tablets which have a depression are prepared in a manner known per se by pressing a plurality of different particulate premixes onto one another.
23. Process according to Claim 22, characterized in that, in step a), two-layer tablets which have a depression are prepared by pressing two different particulate premixes onto one another, one of which comprises one or more bleaches, and the other of which comprises one or more enzymes.
24. Process according to either Claim 22 or 23, characterized in that, in step a), two-layer tablets which have a depression are prepared by pressing two different particulate premixes onto one another, one of which comprises one or more bleaches, and the other of which comprises one or more bleach activators.
25. Process according to one of Claims 16, 18 to 24, characterized in that the basic tablet prepared in step a) comprises protease and/or amylase.
26. Process according to one of Claims 16, 18 to. 25, characterized in that the melt dispersion prepared in step b) consists of 40 to 99.5% by weight, preferably 50 to 97.5% by weight, particularly preferably 60 to 95% by weight and in particular 70 to 90% by weight, of one or more coating substance(s) which has/have a melting point above 30°C, 0.5 to 60% by weight, preferably 1 to 40% by weight, particularly preferably 2.5 to 30% by weight and in particular 5 to 25% by weight, of one or more liquid enzyme preparation(s) dispersed in the coating substance(s), and 0 to 20% by weight, preferably 0 to 15% by weight, particularly preferably 0 to 10% by weight and in particular 0 to 5% by weight, of optionally further auxiliaries and/or active ingredients.
27. Process according to Claim 17, characterized in that the shaping processing in step b) takes place by granulation, compaction, pelleting, extrusion or tableting.
28. Process according to either Claim 17 or 27, characterized in that the particles formed in step b) are mixed with further particulate ingredients of detergents to give a premix which is compressed to give a single-layer tablet.
29. Process according to either Claim 17 or 27, characterized in that the particles formed in step b) are used without further additives as a premix for the preparation, known per se, of a two-layer tablet.
30. Process according to one of Claims 16 to 29, characterized in that the coating substance of the melt dispersion comprises at least one substance from the group of polyethylene glycols (PEG) and/or polypropylene glycols (PPG), preference being given to polyethylene glycols with molar masses between 1500 and 36 000, those with molar masses of from 2000 to 6000 being particularly preferred and those with molar masses of from 3000 to 5000 being especially preferred.
31. Process according to one of Claims 16 to 30, characterized in that the melt dispersion comprises one or more liquid amylase preparations and/or one or more liquid protease preparations.
32. Use of solidified melt dispersions of

    a) one or more coating substance(s) which has/have a melting point above 30°C,

    b) one or more liquid enzyme preparation(s) dispersed in the coating substance(s), and

    c) optionally further auxiliaries and/or active ingredients

    in detergent tablets for machine dishwashing.
33. Use of solidified melt dispersions of

    a) one or more coating substance(s) which has/have a melting point above 30°C,

    b) one or more liquid enzyme preparation(s) dispersed in the coating substance(s), and

    c) optionally further auxiliaries and/or active ingredients

    for the rapid and long-lasting release of enzymes from detergent tablets which comprise these solidified dispersions.