CZ271392A3 - Soap composition transformable to particles or flakes - Google Patents

Abstract

Soap composition transformable into particles or flakes which are readily soluble in cold water, especially suitable for use in washing agent compositions based on detergents and soaps, containing a mixture of fatty acids neutralised with a suitable base, characterised in that the Dalican titre of the fatty acid mixture is less than 38 DEG C and preferably between 10 and 30 DEG C.

Description

Technical field

The present invention relates to a soap composition transformable into particles or flakes that are readily soluble in cold water, particularly suitable for use in detergent and soap based detergent compositions.

BACKGROUND OF THE INVENTION

The current tendency is to reduce the washing temperature, both in washing machines and hand washing, either because of energy savings or the change in outdated washing habits in some countries. Another reason may be to wash delicate delicate fabrics. These tendencies therefore require compositions of detergents that are readily dispersible and soluble even at low wash temperatures, which are understood to mean temperatures between 10 ° C and 40 ° C.

Furthermore, the present tendency is to use detergent compositions which contain soaps as components, partly or wholly replaced by synthetic surfactants, both for household laundry and hand-wash compositions.

It is known that when only coconut fatty acids (Dalican titre = 22-24 ° C) saponified with sodium hydroxide are used, a soap is obtained which is soluble but is not suitable for obtaining, for example, small flakes because of its poor solubility. Another disadvantage of these soaps is their tendency to become too dusty and their tendency to decompose. These properties make the prepared soaps unsuitable, for example, for addition to detergent compositions of the type described, for example, in patent application IT 1255A / S9 by the applicant.

It is also known that by saponification of acids with alkali other than sodium hydroxide, for example potassium hydroxide, ammonium hydroxide or triethanolamine, the cold solubility of said soap can be increased, but the physical characteristics do not allow these soaps (sticky soaps) to be processed into delicate soaps. flakes whose physical properties would make these soaps suitable for addition to industrially manufactured detergent compositions.

SUMMARY OF THE INVENTION

Surprisingly, it has been found that it is possible to achieve a significant improvement in the physical properties of the soap produced and thereby make it suitable for transformation into fine flakes, while the soap produced retains excellent cold solubility, which according to the invention is achieved by using mixtures of fats and oils or fatty acids having a Dalican titer of less than 38 ° C, preferably 10 to 30 ° C, and saponification of the mixtures with sodium hydroxide, potassium hydroxide, ammonium hydroxide or alkanolamines.

In the following, the invention will be explained in more detail by means of examples. However, these examples are illustrative only and do not limit the scope of the invention, which is clearly defined by the wording of the claims.

DETAILED DESCRIPTION OF THE INVENTION

The following examples show soap compositions obtained by saponifying a general mixture of tallow and coconut oil with sodium hydroxide, Example 1 refers to the comparative composition and Examples 2 and 3 refer to the two sodium soap compositions of the invention.

Example 1

Sodium soap composition obtained from general tallow / coconut oil blend.

Fatty acids Content (% by weight) ° 8 0.9 ° 10 1.0 ^C 12 7.3 ^C 14 6.0 ^C 16 ⁺ 16 27.0 ° 18 15.2 ^C 18 ^{'+ C} 18 ⁼ 43.6

Dalicene titre = 38.0 ° C

Example 2

A sodium soap composition obtained from a composition of the invention characterized by a Dalican titre of 23.0 ° C.

- 4 ,,)

Fatty acids Content (% by weight)

'8 3.5 10 4.0 12 24.5 14 9.2 16 ^{+ C} 16 “ 12.5 18 3.0 18 “ ⁺ C18 ⁼ 43.4

Example 3

A sodium soap composition obtained from a composition of the invention characterized by a Dalican titer of 16.0 ° C.

^C 10 ^C 12 ^C 14 ^C 16 ^{+ C} 16 " ^C 18 ~ ^C 18 ^:

Fatty acids Content (% by weight)

3,5 4,0

25.3

10.3

9.8 2.3

45.1

The soaps prepared according to the above compositions were transformed into flakes having a length of 2 to 5 mm and a width of 0.3 mm. The flakes thus prepared were introduced into water at different temperatures, measuring the time of complete dissolution of the soap flakes at different temperatures. temperatures. The following table shows the relative dissolution times of said soap flakes of Examples 1 to 3 in water (expressed in seconds), measured as a function of the water temperature.

TABLE 1

Soap from Soap from Soap from Example 1 of Example 2 of Example 3

T ° C) * Dissolution times in seconds

20 May 100 ALIGN! 17 10 30 67 11 7 40 13 9 5

It can be seen from the table that the dissolution times of the soaps of the invention are substantially lower than the dissolution times of the comparative soap of Example 1.

The flakes obtained from the soaps according to the invention further exhibit excellent physical properties in terms of cohesion and do not tend to have excessive dustiness and decomposition, nor to increase stickiness during rolling and final processes and their subsequent use in detergent powders.

The above compositions also allow drying of soaps to very low moisture levels, which are below 5%, while the processing properties for the flocculation remain unchanged and its physical properties are not adversely affected so that they can also be used in products in which the ingredients in the presence of moisture easily decompose.

These properties make said soap flakes according to the invention particularly suitable for use in detergent compositions of the type described in patent application 12597 ^ / 89 of the same applicant.

Higher solubility at low temperatures leads to increased washing performance, especially in the case of greasy dirt. Furthermore, the deposition of undissolved soap residues from the washing machine on the laundry and their removal is prevented when using the compositions of the invention.

Despite the soaps described in the above examples, which have been obtained by saponification of a fatty acid mixture with sodium hydroxide, there is still contemplation of using potassium hydroxide as a saponification agent providing soaps that are even more soluble than sodium soaps but which do not have the tackiness of conventional potassium soaps.

Claims (13)

A soap composition transformable into particles or flakes that are readily soluble in cold water, are suitable for use in detergent and soap compositions comprising detergent and soap compositions comprising a fatty acid neutralized mixture with a suitable base, characterized in that the Dalican titre of said composition The fatty acids are less than 38 ° C and preferably between 10 and 30 ° C. Composition according to claim 1, characterized in that said mixture of fatty acids comprises a mixture of 0- to C 1-6 fatty acids. 3. The composition of claim 1 wherein said neutralizing base is sodium hydroxide. 4. The composition of claim 1 wherein said neutralizing base is potassium hydroxide. 5. The composition of claim 1 wherein said neutralizing base is ammonium hydroxide. 6. The composition of claim 1 wherein said neutralizing base is an alkanolamine. A soap composition according to claim 1, characterized in that it is particularly suitable for transformation into fine flakes, powder or granules. Composition according to claim 7, characterized in that the distance of said flakes is between 1 and 10 mm and the width is of the order of 0.3 µm. Composition according to claim 7, characterized in that the size of said granules ranges from 0.2 to 3.00 mm. Composition according to any one of the preceding claims, characterized in that it further comprises soluble dyes or pigments. Composition according to any one of the preceding claims, characterized in that it contains sodium soap obtained from the following fatty acid mixture, said content being expressed in percent by weight: Fatty acids Content (% by weight) 3.5 4.0 24.5 9,2 12.5 3,0 43.4 C c c c G 16 ^{+ C} 16 “ 18 ' ^{+ C} 18 ⁼ said fatty acid mixture characterized by a Dalian titer of 23.0 ° C. Composition according to any one of the preceding claims 1. to 10, characterized in that it contains sodium soap obtained from the following mixture of fatty acids in percent by weight: '8 3.5 10 4.0 12 25.3 14 10.3 16 ^{+ C} 16 9.8 18 2.3 18 ~ ⁺ C18 ⁼ 45.1 characterized by a Dalican titre of 16.0 ° C. Use of said soap composition according to any one of the preceding claims either alone for washing in domestic washing machines or as an additive component in detergents with high or controlled sudsing properties. washing machines or for washing hard surfaces.