GB1598102A

GB1598102A - Cleansing composition

Info

Publication number: GB1598102A
Application number: GB895778A
Authority: GB
Original assignee: Tate and Lyle PLC
Current assignee: Tate and Lyle PLC
Priority date: 1978-03-07
Filing date: 1978-03-07
Publication date: 1981-09-16

Description

(54) CLEANSING COMPOSITION (71) We, TATE & LYLE LIMITED, a British Company of Sugar Quay, Lower Thames Street, London EC3R 6DQ (formerly of 21 Mincing Lane, London EC3R 7QY), do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to cleansing compositions for the skin, especially for the hands.

Removal of oil- and grease-based industrial dirt from the hands is conventionally achieved by use of a paste or gel composition based on a hydrocarbon solvent such as kerosene (paraffin oil) together with a soap. Soap itself is inefficient in dealing with industrial dirt of this kind. However, kerosene-based compositions are undesirable in many respects and there is a need for an industrial hand cleanser which is pleasant to use, kind to the skin, non-polluting and, of course, highly effective in removing oily industrial dirt.

We have found that a particular combination of one or more sucrose esters of fatty acids with soap, other surfactants and long-chain fatty acids can provide a cleansing composition having the required properties.

According to the present invention we provide a cleansing composition containing 9 to 20% by weight of a surfactant mixture comprising by weight fatty acid sucrose esters 6.5 -- 9.5% fatty acid mono- and di-glycerides 2 -- 4% sodium and/or potassium soap 15 - 17.5 % a nonionic surfactant 26 - 33.5% sucrose 3 - 5.5% an amphoteric surfactant 20 - 40% a liquid long-chain fatty acid 6 -- 9% dyestuff, perfume, biocide etc. up to 3% dispersed in water to 100%.

The water used in preferably distilled or otherwise deionised water, especially if an optically clear composition is required.

The fatty acid sucrose esters suitable for compositions according to the present invention generally comprise sucrose mono- and di-esters of C8 to C20 fatty acids.

Particularly preferred esters are those of the mixed acids obtained from naturally occurring triglycerides, for example- tallow, palm oil or coconut oil and partially hydrogenated derivatives thereof. Particularly preferred sucrose esters are those derived from tallow having an iodine value of about 45.

In general, the soap in the composition is a sodium and/or potassium soap of one or more fatty acids of the same type as those in the sucrose esters. However, a proportion of the soap is desirably a fully hydrogenated soap, for example sodium or potassium stearate.

The fatty acid mono- and di-glycerides in the composition are conveniently mono and di-glycerides of the same fatty acids occurring in the sucrose esters and are con veniently formed when the sucrose esters are produced, for example by transesterification of fatty acid triglycerides with sucrose as in the process described and claimed in British Patent Specification 1,399,053.

The nonionic surfactant may be any convenient commercially available surfactant of this type. Fatty acid hydroxy amides are, however, the preferred type and surfactants such as lauric diethanolamide are particularly preferred.

The amphoteric surfactant may be any convenient commercially available surfactant of this type, but is preferably a salt of a carboxylated fatty acid derivative of a nitrogen heterocycle, in particularly disodium salt of dicarboxylated imidazoline derivatives of fatty acids having an average chain-length of C12, such as Miranol C2M (Trade Mark) and Lonza WM2 (Trade Mark). The proportion of the amphoteric surfactant in the composition is one factor in controlling the physical characteristics of the cleansing composition, higher concentrations of amphoteric surfactant being used in gel formulations while lower concentrations are used in liquid formulations.

The liquid fatty acid in the composition is generally speaking an unsaturated fatty acid, for example with 18 carbon atoms such as linoleic acid, linolenic acid or, especially, oleic acid.

The compositions according to the present invention take the form of liquids or gels and, provided deionised water is used in their manufacture, can be produced in optically clear form. They may contain up to 3 % of conventional additives such as dyestuffs, perfuming agents, biocides, antiseptics and pearlising agents. Other optical additives may include á source of zinc ions in order to soften the skin.

In order to obtain the composition in the form of a clear stable dispersion, it is preferably formulated by the following process, which constitutes a further feature of the present invention.

A process for the production of a cleansing composition according to the present invention comprises dissolving the emphoteric surfactant, from 50 to 60% by weight of the total soap, and the other minor ingredients such as dyestuff and biocide in the water at an elevated temperature, preferably 50 to 70"C, e.g. about 60"C; mixing the fatty acid, sucrose esters, sugar and the remainder of the soap together with the nonionic surfactant and heating the mixture to a temperature similar to that of the aqueous solution and blending well to produce a homogeneous mixture; and slowly adding the homogeneous mixture to the aqueous solution with vigorous stirring; adding the perfuming agent as desired and cooling the clear liquid obtained to obtain a thick liquid or gel.

The final form of the composition will, as explained above, depend on the relative proportions of the constituents, particularly the level of amphoteric surfactant. The mixture obtained will, of course, only be clear if delonised water is used in the process and no optional ingredients such as pearlising agents are used which would affect the clarity.

The sucrose esters, glycerides, sucrose and a proportion of the soap (40 to 50%) are preferably obtained as a premix before formulating the composition. The premix may be obtained by mixing the individual components, but preferably is obtained by treatment of the crude reaction product obtained on transesterifying sugar with a fatty acid triglyceride, to remove the unreacted triglyceride and a substantial proportion of the mono- and di-glycerides. This can conveniently be achieved by treating the solid product with a solvent for the glycerides, for example ethyl acetate.

The following examples illustrate the invention.

Example 1.

Gel Formulation.

Premix (A) % by weight Potassium soaps 37.4 Sucrose 20.1 Mono- and di-glycerides 9.5 Sucrose mono- and di-esters 33.0 Premix (B) Parts by weight Miranol C2M Conc. 5 Sodium stearate 1.5 Dyestuff 0.012 Biocide (Grotan BK) 0.15 Premix (C) Parts by weight Premix (A) 3 Lauric diethanolamide 4 Oleic acid 1 Premix (B) is prepared by heating distilled water (sufficient to give a total composition of 100 parts by weight) to about 60"C. The sodium stearate is then added to form a slightly turbid solution and then the Miranol, dyestuff and biocide are mixed in. Premix (C) is prepared by mixing the oleic acid, lauric diethanolamide and premix (A) at a temperature of about 60"C.

Premix (C) is then slowly added to premix (B) with stirring and when an even mixture is produced, perfume (0.15 parts by weight) is added. The resultant clear liquid is then allowed to cool to provide a clear gel.

Example 2.

Thick Liquid Formulation.

Premix (A) As in Example 1 Premix (B) Parts by weight Amphoteric Lonza WM2 (Trade Mark) 3 Sodium stearate 1 Dyestuff 0.012 Biocide (Grotan BK) 0.15 Premix (C) Parts by weight Premix (A) 3 Lauric diethanolamide 4 Oleic acid 1 The composition is formed by the same procedure as in Example 1 and cooled to produce a clear thick liquid formulation.

WHAT WE CLAIM IS:- 1. A cleansing composition containing 9 -- 20% by weight of a surfactant mixture comprising by weight fatty acid sucrose esters 6.5 - 9.5% fatty acid mono- and di-glycerides a -- 4% sodium and/or potassium soap 15 - 17.5% a nonionic surfactant 26 - 33.5% sucrose 3 - 5.5% an amphoteric surfactant 20 - 40% a liquid long-chain fatty acid 6 -- 9% dyestuff, perfume, biocide etc. up to 3% dispersed in water to 100%.

2. A composition according to Claim 1, in which the water is distilled or otherwise deionised water.

3. A composition according to Claim 1 or Claim 2, in which the esters are sucrose mono- and di-esters of C8 to C20 fatty acids.

4. A composition according to Claim 3, in which the esters are those of the mixed acids derived from naturally occurring triglycerides.

5. A composition according to any of Claims 1 to 4, in which a proportion of the soap is a fully hydrogenated soap.

6. A composition according to any of Claims 1 to 5, in which the non-ionic surfactant is a fatty acid hydroxy amide.

7. A composition according to any of Claims 1 to 6, in which the amphoteric surfactant is a salt of a carboxylated fatty acid derivative of a nitrogen heterocycle.

8. A composition according to any of Claims 1 to 7, in which the liquid fatty aid is oleic acid.

9. A composition according to any of Claims 1 to 8, substantially as herein described.

10. A cleansing composition substantially as described in either of the examples.

11. A process for the production of a composition according to Claim 1 comprising dissolving the amphoteric surfactant from 50 to 60% by weight of the total soap, and the other minor ingredients such as dyestuff and biocide in the water at an elevated

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. Premix (B) is prepared by heating distilled water (sufficient to give a total composition of 100 parts by weight) to about 60"C. The sodium stearate is then added to form a slightly turbid solution and then the Miranol, dyestuff and biocide are mixed in. Premix (C) is prepared by mixing the oleic acid, lauric diethanolamide and premix (A) at a temperature of about 60"C. Premix (C) is then slowly added to premix (B) with stirring and when an even mixture is produced, perfume (0.15 parts by weight) is added. The resultant clear liquid is then allowed to cool to provide a clear gel. Example 2. Thick Liquid Formulation. Premix (A) As in Example 1 Premix (B) Parts by weight Amphoteric Lonza WM2 (Trade Mark) 3 Sodium stearate 1 Dyestuff 0.012 Biocide (Grotan BK) 0.15 Premix (C) Parts by weight Premix (A) 3 Lauric diethanolamide 4 Oleic acid 1 The composition is formed by the same procedure as in Example 1 and cooled to produce a clear thick liquid formulation. WHAT WE CLAIM IS:-

1. A cleansing composition containing 9 -- 20% by weight of a surfactant mixture comprising by weight fatty acid sucrose esters 6.5 - 9.5% fatty acid mono- and di-glycerides a -- 4% sodium and/or potassium soap 15 - 17.5% a nonionic surfactant 26 - 33.5% sucrose 3 - 5.5% an amphoteric surfactant 20 - 40% a liquid long-chain fatty acid 6 -- 9% dyestuff, perfume, biocide etc. up to 3% dispersed in water to 100%.

temperature, mixing the fatty acid, sucrose esters, sugar and the remainder of the soap together with the nonionic surfactant and heating the mixture to a temperature similar to that of the aqueous solution and blending well to produce a homogeneous mixture; and slowly adding the homogeneous mixture to the aqueous solution with vigorous stirring; adding the perfuming agent as desired and cooling the clear liquid obtained to obtain a thick liquid or gel.

12. A process according to Claim 11, in which the water is at about 50 to 70"C.

13. A process according to Claim 11 or Claim 12, in which the sucrose esters, glycerides, sucrose and 40 - 50% of the soap are added as a premix obtained before formulating the composition.

14. A cleansing composition obtained by a process according to any of Claims 11 to 13.