EP0056349A1 - Detergent paste - Google Patents

Abstract

Paste capable of being employed for manual washing, containing 10 to 35% by weight of copra derivative, 0 to 20% by weight of palm derivative, 4 to 10% by weight of at least one alpha -methylsulphonated fatty acid ester, 50 to 50% by weight of water, and the necessary quantities of at least one base chosen from sodium hydroxide, potassium hydroxide and amines (preferably triethylamine) to ensure the saponification of the copra and palm derivatives.

Description

The present invention relates to a detergent paste intended mainly for washing by hand.

The technical sector considered is that of cleaning products and, in particular, those intended for manual washing, as well as that of detergent compositions and soaps.

We know that traditional soap, if it meets current "ecological" concerns, has many drawbacks, especially when used in hard water. In contrast, we now offer the most effective synthetic detergents in terms of cleaning properties. They are criticized in particular for their high cost, due to the increase in petroleum products from which the synthetic components used are derived, the pollution caused, in particular by the use of polyphosphates as "builders" and complexing hard ions.

The problem to be resolved is therefore to avoid as much as possible the use of expensive, eutrophying synthetic products while eliminating the disadvantages of precipitation encountered with traditional soap.

• - un dérivé du coprah et, de préférence, un dérivé de palme convenablement saponifiés,
• - un dispersant biodégradable,
• - et de l'eau.

The invention provides a new detergent paste for manual washing, essentially characterized in that it comprises:

• - a derivative of copra and, preferably, a derivative of palm suitably saponified,
• - a biodegradable dispersant,
• - and water.

By "derivative" of copra and by "derivative" of palm, is meant the oils and fatty acids of copra and palm. The byproducts of the refining of coconut and palm oils intended for food use may advantageously be used as "coconut or palm derivatives". These by-products are in particular available in large quantities in various countries in the process of that harvest these oils.

These copra and palm "derivatives" will be saponified by reaction with the necessary quantity of a base or, preferably, of a mixture of bases chosen from soda, potash and the like. amines (especially triethanolamine).

The biodegradable dispersant used in the invention is an α-methylsulfonated fatty acid ester.

• 10 à 35% de dérivé de coprah,
• 0 à 20% de dérivé de palme,
• 4 à 10% d'au moins un ester d'acide gras a-méthylsulfoné,
• et les quantités nécessaires d'au moins une base choisie parmi la soude, la potasse et les amines (de préférence la triéthanolamine) pour assurer la saponification desdits dérivés de coprah et de palme.

The invention therefore relates to a new detergent paste for manual washing, characterized in that it comprises (by weight relative to the final paste):

• 10 to 35% of copra derivative,
• 0 to 20% palm derivative,
• 4 to 10% of at least one α-methylsulfonated fatty acid ester,
• and the necessary quantities of at least one base chosen from soda, potash and amines (preferably triethanolamine) to ensure the saponification of said coconut and palm derivatives.

• - entre 0 et 3 % (en poids) de silicate de sodium,
• - entre 0 et 4 % d'émulsifiant,
• - entre 0,5 et 1,5% (en poids)de parfum,
• - entre 50 et 60 % (en poids) d'eau.

Preferably, the detergent composition also comprises:

• - between 0 and 3% (by weight) of sodium silicate,
• - between 0 and 4% of emulsifier,
• - between 0.5 and 1.5% (by weight) of perfume,
• - between 50 and 60% (by weight) of water.

The detergent paste, final product according to the invention, is in the form of a "soft soap", intermediate between the "hard soap", produced from. saponification of fatty acids by soda, and "liquid soap", product of the saponification of fatty acids by potash.

Essentially, the essential components of the dough are the oils or fatty acids of palm and coconut, soda, potash and triethanolamine in solution, and esters of a-methylsulfonated fatty acids.

Although only a coconut derivative can be used as oil or fatty acids of natural origin, the presence of a palm derivative is important insofar as, thanks to this presence, the solubility of dough. This solubility can constitute a very sought-after property, in particular in washing in hard water.

The pasty degree of the final product is determined by the soda / potash / triethanolamine ratio.

The amounts of soda, potash and ethanolamine are calculated according to those of fatty acids to be saponified.

Me étant un métal, par exemple alcalin; R et R' étant des radicaux alcoyles à chaîne linéaire préférentiellement, ces produits répondent au souci de biodégradabilité dans le milieu environnant.To disperse the "lime soaps", characterized by gray deposits on the laundry, the containers where we do the laundry, when the water used contains "hard" ions, we use a preferential agent taken in the esters of a-methylsulfonated fatty acids corresponding to the formula:

Me being a metal, for example alkaline; R and R ′ being preferably linear chain alkyl radicals, these products respond to the concern for biodegradability in the surrounding medium.

These esters of a-methylsulfonated fatty acids give the product an improved dispersing power while meeting the conditions of biodegradability and non-pollution; moreover, as known, said esters improve the detergency of the paste.

In addition, to improve the detergent properties of the paste, it is also possible to use, in very limited proportions, however, alkaline additives playing the role of "builder", such as sodium silicate, which also protects against corrosion. the containers. It is also possible to add sodium hypochlorite to lighten the dough, perfumes such as: synthetic bergamot, hydroxycitronellol, methyl dihydrojasminate, phenylethyl alcohol, synthetic jasmine, vetiveryl acetate, foaming agents, anti-redeposition agents, plasticizers, emulsifiers, optical brighteners.

It is also possible to color this paste by adding the chosen product in quantities varying according to their nature and well known to those skilled in the art, but in any case always minute, relative to the total weight of the composition.

One of the essential advantages of the invention is the profitability of the by-products of the preparation of coconut oils and palm oils, in particular the by-products originating from the physical refining of coconut and palm oils for food use, refining which is carried out in particular by steam entrainment, under vacuum, at around 250 ° C.

Another advantage of the product according to the invention is that it is particularly suitable for washing methods which are widely used in copra and palm producing countries.

La composition doit renfermer au moins les composants 2 et 6 et éventuellement4ou5,essentiels à l'obtention d'une pâte détergente. L'eau intervient comme diluant inerte afin de donner un produit final d'activité correspondant à l'usage auquel il est destiné.Examples of compositions are given below for the production of detergent paste where the figures correspond to a percentage of weight of component relative to the total weight of the components.

The composition must contain at least components 2 and 6 and possibly 4 or 5, essential for obtaining a detergent paste. Water acts as an inert diluent in order to give a final activity product corresponding to the use for which it is intended.

Secondary components are involved in improving the quality of the product and constitute only a small proportion of the total mass.

Of course, without departing from the scope of the invention, various modifications by equivalent means can be made by those skilled in the art to the products which have just been described only by way of nonlimiting examples.

Claims (5)

1 - Detergent paste usable for hand washing, characterized in that it contains: 10 to 35% by weight of copra derivative, 0 to 20% by weight of palm derivative, 4 to 10% by weight of at least one ester of a-methylsulfonated fatty acid, 50 to 60% by weight of water,
and the necessary quantities of at least one base chosen from soda, potash and amines (preferably triethylamine) to ensure the saponification of the copra and palm derivatives. 2 - Paste according to claim 1, characterized in that it further comprises between 0 and 3% by weight of sodium silicate, based on the total weight. 3 - Paste according to any one of claims 1 and 2, characterized in that it further comprises between 0 and 4% of an emulsifying agent. 4 - Paste according to any one of claims 1 to 3, characterized in that it further comprises between 0.5 and 1.5% by weight of perfume, based on the total weight. 5 - A paste according to any one of claims 1 to 4, characterized in that said fatty acids may be by-products of the refining of palm and copra oils for food use.