JPS63101490A - Composition for tableware washing machine - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a dishwashing line composition (IIlaCiliriOdish*) containing little or no phosphate.
ashingcoa+position), especially enzyme-containing compositions.

In the conventional detergent field, it is desirable for environmental reasons to contain small amounts or no phosphates, but it is difficult to find alternative compounds that have all the properties of phosphates. Over the last two decades, a number of alternative compounds have been proposed for use alone or in combination, including zeolites, sodium nitrilotriacetate and citrate.

An example of a less commonly used phosphate substitute is dipicolin Ill (2,6-pyridinedicarboxylic acid) or a salt thereof. British patent Nα1,342,0
No. 95 states that this compound is not effective for use in dishwashing line compositions. German patent order 26196
No. 68 describes the use of dipicolinic acid in combination with relatively soluble magnesium salts in hand dishwashing compositions that exhibit excellent foaming properties under hard and soft water conditions. US Pat. No. 3,956,159 describes dipicolinic acid as a suitable stabilizer for peroxy bleaches. European patent k O,082,5
No. 64 describes a dishwashing line composition containing dipicolinic acid as a sequestering agent, but does not mention the use of enzymes as a co-additive at all.

It has been discovered that enzymes can be incorporated into dipicolinic acid-containing compositions to improve their performance, and the literature (Aldrich Che.
mie, Benelux, 1984- Ald.
rich is Aldrich Chenlie S^/N
It has been found that, contrary to the description of V. (registered trademark), the use of dipicolinic acid does not inhibit the action of enzymes on stains.

The dishwashing line composition provided by the present invention contains an enzyme and a carboxylic acid derivative of pyridine having the following general formula or a water-soluble or water-dispersible salt thereof.

In the above formula, R is a hydrogen atom, a halogen atom, a hydroxy group, an amino group, a carboxyl group, or a short I-chain alkyl group.

Dishwashing line compositions are usually formulated to provide a cleaning solution that removes stains, chars, starchy substances, colored substances, etc. without corroding glass, ceramic or metal tableware.

It must be prepared so that no films or spots are formed on the cleaned surface.

For the purposes mentioned above, conventional dishwashing compositions typically contain amounts of relatively alkaline, mineral-free salts (e.g., alkali metal phosphates, alkali metal silicates, and alkali metal carbonates) and active chlorine or oxygen. and optionally ingredients such as proteolytic and/or amylolytic enzymes and nonionic surfactants for foam control and wetting.

In the present invention, in order to prepare a composition for dishwashing lines that has performance equivalent to or better than that of a conventional composition containing salt-free salt, bleach, an enzyme, and an optional nonionic surfactant,
The conventional phosphate component was substantially replaced by the above pyridine derivative.

Surprisingly, not only is dipicolinic acid an acceptable substitute for phosphate, but unlike many conventional phosphate substitutes in dishwashing line compositions, dipicolinic acid's cleaning performance on a wide variety of soils is was found to be superior to the cleaning performance of phosphate-containing compositions.

The reason for incorporating the pyridine derivative is to reduce the amount of phosphate used or to discontinue the use of phosphate while maintaining the performance of phosphate. Therefore, the composition of the present invention is 6% by weight, preferably less than 4% by weight, or substantially no phosphate.

The composition of the present invention may contain one or more alkaline salts, bleaches and nonionic surfactants, either alone or in combination.

It is preferable that the pyridine derivative is contained in the composition in an amount of 5 to 50% by weight or 15 to 30% by weight.

Preferably R is a hydrogen atom.

Pyridine derivatives are usually used in the form of their salts, especially alkali metal salts (eg sodium salts). If desired, ammonium salts or substituted ammonium salts of pyridine may be used.

The dishwashing line compositions of the present invention may include one or more salts providing suitable alkalinity and buffering properties. Therefore, the composition of the present invention contains silicic acid (particularly metasilicic acid)
, carbonic acid, boric acid, citric acid.

Organic and/or inorganic builder-filler salts such as the alkali metal salts of carboxymethyloxysuccinic acid, nitrilotriacetic acid and ethylenediaminotetraacetic acid and polyelectrolytes such as polyacrylates, polymethacrylates and boriamariates may be included. Polyelectrolyte is 0~
Present at 20% by weight. 5okalan Cr2.5ok
alan Cr2. Gantrez and Build
er U is exemplified. Molecular weight is 1,000-5.00
It can be in the range of 0,000. It is also possible to use the salts mentioned above or in combination with an inert filler salt such as sodium sulfate.

The amount of salt mentioned above is from 10 to 90% by weight of the composition, usually 30% by weight of the composition.
~70% by weight.

The composition of the present invention further includes an oxygen or chlorine releasing bleaching component. Since a suitable chlorine-releasing bleach contains the above-mentioned enzyme components, it is necessary to protect the composition by encapsulating the bleach so that the composition is not affected by the above-mentioned chlorine-releasing bleach. Must. Preference is given to using oxygen-releasing bleaches. In the present invention, peroxo salts (DQ
Particular preference is given to using rOXVllllf3n 5alt).

It is also advantageous to combine the persalts with their activators.

Activators for beroxo salts are organic compounds that react with beroxo salts in solution to form organic beroxo acids that are effective bleaching agents. A large number of active agents are known in the art. Preferred active agents for use in the present invention are tetraacetyl ethylene diamine, tetraacetyl glycoluril, glucose pentaacetate and xylose tetraacetate.

Usually, the peroxo salt is present at a maximum of 25% by weight, especially from 3 to 15% by weight, based on the total weight of the composition.

If a bleach activator is used, the ratio of beroxo salt:activator is from 8:1 to 1:1, especially from 4:1 to 1.5:1.

It is preferable to include an essentially nonionic surfactant as an optional component in the composition of the present invention. In particular, low-foaming or non-foaming nonionic surfactants may be used selected from alkoxylated nonionic surfactants in which the alkoxy moiety consists of ethylene oxide, propylene oxide and/or butylene oxide or mixtures thereof.

As the low foaming or non-foaming nonionic surfactant suitably and preferably used in the present invention, ICI C0II
II) 5ynpchronic LF/ commercially available from anV
R830 snake 5ynperonic LF'/R^40
, Ltlt [ commercially available from BASF Company
1SOI LF 403 and Lutcnsol LF
1300 and Rohm & Haas Coa+pa
Exemplary are ethoxylated straight chain alcohols such as TritOn DF 12, available from New York, NY.

The nonionic surfactant should be such that it has improved detergency and wetting properties and reduces or suppresses excessive foaming due to proteinaceous soils. The usual use M is from 0.2 to 10% by weight, in particular from 0.5 to 5% by weight, based on the total weight of the composition.

The compositions of the present invention are substantially free of other types of surfactants, such as anionic surfactants or cationic surfactants.

Enzymes can be used to degrade starch (alyllolytic), proteolytic (proteo+yt; c) or lipolytic (Iipo)
lyNc) enzyme or mixture thereof. The starch-degrading enzyme used in the present invention is an enzyme derived from M. bacterium or a fungus.

A preferred starch degrading enzyme is Bacillus Iich
eniformisNCIB 8061. NCIB
8059. ATCC6334, ATCC6598゜A
TCC11945, ATCC8480 and ATCC99
It is an enzyme cultured from bacterial strain No. 45^ (see British Patent No. 1, 296.83g specification). Particularly preferred enzymes are Novo Industry A/S, Cope
Manufactured by nhagen, Denmark, TOrm
This is a starch-degrading enzyme commercially available under the trade name amyl. These starch degrading enzymes are usually commercially available in granular form and have an activity of about 2 to 10 maltose units/η.

The starch degrading enzyme is usually 0.1 to 5% by weight, especially 0.3 to 1% by weight.
．． It is blended in an amount of 5% by weight.

The composition of the present invention may contain a protease (preferably, the composition of the present invention contains a protease). Suitable proteolytic enzymes include G15t-Brocade
s MV, commercially available from Delft (Netherlands) under the trade names HaXataSe and Novo Industri^
/S, commercially available product name ^1calase from Copenhaacn (Denmark), subtms
and B, a subtilisin obtained from certain strains of P. lichcniformis. Particularly preferably,
From Novo Industry A/S [5per
It is a protease obtained from a Bacillus strain and exhibits maximum activity at pH 8 to 12, which is commercially available under the trade names aSO and 5avinase. The preparation of these and similar enzymes is covered by British patent NQ 1,243,784.
It is described in.

Proteolytic enzymes are usually commercially available in granular form, with approximately 50
It has an enzymatic activity of 0 to 1700 glycine units/η. Proteolytic enzymes are usually 0.1 to 5% by weight, especially 0.3 to 1% by weight.
．． It is blended in an amount of 5% by weight.

The compositions of the invention further include enzyme stabilizers, hydrotropes, fragrances, colorants, fungicides, soil suspending agents.

Aminopolyphosphoric acid and its alkali metal or alkaline earth metal salts, corrosion inhibitors such as fatty acids.

Conventional ingredients known in the art such as benztriazole can also be included.

The product of the present invention has an underwater weight of 3g/! The pH of the washing liquid should be adjusted to 7 to 12.5, particularly 9.5 to 12.0 at the concentration used.

The products of the invention are in powder, gel or liquid form.

Examples of the present invention will be shown below.

A dishwashing composition having the following composition was prepared according to a conventional granulation and mixing method.

Weight % Sodium metasilicate pentahydrate 65 Sodium perborate hydrate 1savtnase1)i Termail"' 1syn
peronic RA 403) 11) Novo I
Commercially available protease from nduStri A/S 2)
Commercially available amylase from Novo Industry A/S 3) Imperial Chemical In
Commercially available ethoxylated linear alcohol nonionic surfactant from PLC (blank below) The builder salts used and their abbreviations are shown below.

Sodium Carbonate/Calcite Carb/Calc Sodium Zeolite 4 Zeo I Sodium Dipicolinate DPA Sodium Citrate
cit Sodium Nitrilotriacetate NTA Carboxymethyloxymalone HOH Sodium Carboxymethyloxysuccinate MOS These compositions can be used to grow potatoes, Bambix (ba
a+bix), porcelain (po) stained with custard and egg yolk
rc) and stainless steel (st st) tableware, as well as tea, coffee, custard, egg yolk. Cleaned other items stained with milk and lipstick. The stain was deposited over the entire surface of the item (7 utensils with 2.59 stains). Thereafter, it was stored for 24 hours at 30° C. and 55% relative humidity. Washing is 2
Seed Machine (HIELE G542 and TIIOMSON
BRANDT T 12 Gl) according to the following washing block.

■[LF G542 universal 55'''
Program pre-wash main wash heated to 55℃ for 12 minutes) cold rinse final rinse (60℃) Total time - 65 molecules HOMSON BRAND T 12 Gl, ec
o 50°C program Main wash (heated to 47°C for 2 minutes) Cold rinse Final rinse (58°C) Total time - 62 minutes Δ shown in the table is defined as follows.

Δ−(% of stain remaining when using test composition)−
(% of soil remaining when using a control composition with the same ingredients except sodium tripolyphosphate) Therefore, a negative value of Δ means that the test composition has superior cleaning performance. do.

No difference was observed in terms of removal of potatoes, breakfast cereals, coffee, egg yolks, and milk.

■2 No differences were observed in terms of removal of potatoes, breakfast cereals, coffee, egg yolks, and milk.

Example 2 The effects of amylolytic enzymes and proteolytic enzymes in the presence of 0P^ were investigated.

Condition: Hiele G542 universal
Overflow at 55°C: 20g/machine standard evaluation soil water hardness 15°FN No salt From the above results, contrary to expectations, an effect was observed even when both DP8 and enzyme were added.

Unilever Namrobi Pen Note Sharp

Claims (7)

[Claims] (1) A detergent composition for automatic dishwashers containing dipicolinic acid or a salt thereof, characterized in that it contains an effective amount of an enzyme. (2) The composition according to claim 1, wherein the enzyme is an amylolytic, proteolytic or lipolytic enzyme or a mixture thereof. (3) The composition according to claim 1 or 2, wherein the enzyme is present in an amount of 0.1 to 10% by weight. (4) The composition according to any one of claims 1 to 3, wherein the composition contains less than 6% by weight of phosphate in terms of phosphorus. (5) The composition according to any one of claims 1 to 4, further comprising an oxygen- or chlorine-releasing bleaching component. (6) The composition according to any one of claims 1 to 5, further comprising an essentially nonionic surfactant. (7) A composition according to any one of claims 1 to 6, wherein the composition has a pH of 9.5 to 12 at a concentration of 3 g/l in water.