Wax dispersions having conditioning properties

Patent metadata

Field	Value
Publication number	US-12201711-B2
Application number	US-201917057755-A
Country	US
Kind code	B2
Filing date	May 27, 2019
Priority date	May 30, 2018
Publication date	Jan 21, 2025
Grant date	Jan 21, 2025

Abstract

What are described are aqueous wax dispersions based on ethylene glycol fatty acid esters of specific fatty acids that can be used both as opacifiers and for improvement of conditioning action in formulations for haircare.

First claim

The invention claimed is:

1. An aqueous wax dispersion suitable as opacifier and/or conditioner for cosmetic formulations, comprising
a) 20% to 35% by weight, based on the aqueous dispersion, of an ethylene glycol fatty acid ester as wax body and
b) 0.5% to 3.0% by weight, based on the aqueous dispersion, of a fatty acid partial glyceride and
c) 8% to 15% by weight, based on the aqueous dispersion, of an anionic surfactant selected from the group formed by fatty alcohol ether sulfates and
d) an amphoteric surfactant selected from the group formed by betaines,
wherein the ethylene glycol fatty acid ester (a) is formed by stearic acid or a mixture of fatty acids comprising 85-100% by weight, based on fatty acid, of stearic acid;
wherein the average particle diameter of (a) is in the range from 1 to 4 μm; and
wherein the wax dispersion does not result in pearlescence.

2. The aqueous wax dispersion according to claim 1 , wherein the ethylene glycol fatty acid ester present as a) is formed from 90% to 98% by weight of stearic acid and 2% to 10% by weight of other saturated fatty acids having 16 to 22 carbon atoms, based on the total amount of fatty acid.

3. The aqueous wax dispersion according to claim 1 , wherein the fatty acid partial glyceride (b) is selected from the group formed by glycerol fatty acid monoesters, wherein the fatty acids have 12 to 18 carbon atoms.

4. The aqueous wax dispersion according to claim 1 , wherein a) and b) are present in the dispersion in a weight ratio of a):b)=15:1 to 20:1.

5. The aqueous wax dispersion according to claim 1 , wherein c) is selected from the group formed by lauryl ether sulfate having an average ethoxylation level of 1 to 2.

6. The aqueous wax dispersion according to claim 1 , wherein a) and c) are present in the dispersion in a weight ratio of a):c)=2:1 to 4:1.

7. The aqueous wax dispersion according to claim 1 , wherein d) is selected from the group formed by coco fatty acid amidopropyl betaine.

8. The aqueous wax dispersion according to claim 1 , wherein d) is present in an amount of 0.5% to 3.0%, by weight, based on the aqueous dispersion.

9. The aqueous wax dispersion according to claim 1 , wherein c) and d) are present in the dispersion in a weight ratio of c):d)=4:1 to 8:1.

10. The aqueous wax dispersion according to claim 1 , which comprises a) to d), water, pH regulators, and optionally a preservative.

11. A method of opacifying a cosmetic formulation for hair treatment comprising the use of the aqueous wax dispersion according to claim 1 .

12. A method of conditioning the hair comprising the use of the aqueous wax dispersion according to claim 1 in a cosmetic formulation for hair treatment.

13. A method of improving the conditioning action of a cationic modified polymer in a cosmetic formulation for hair treatment comprising the use of the aqueous wax dispersion according to claim 1 , in an amount of 1% to 5%, by weight, based on the formulation for hair treatment.

14. The method according to claim 13 , wherein the cationically modified polymer is selected from the group formed by cationically modified guar, PQ-7, and PQ-10.

15. A cosmetic composition for conditioning hair treatments comprising the aqueous wax dispersion according to claim 1 and anionic surfactants and cationic polymers, and optionally amphoteric/zwitterionic surfactants, emulsifiers or further customary ingredients, and water for supplementation to 100% by weight.

16. The aqueous dispersion according to claim 3 , where the fatty acid partial glyceride (b) is a glycerol fatty monoester of a fatty acid mixture comprising 90% to 100% by weight oleic acid, based on the fatty acid mixture.

17. An aqueous wax dispersion suitable as opacifier and/or conditioner for cosmetic formulations, comprising
a) 20% to 35% by weight, based on the aqueous dispersion, of an ethylene glycol fatty acid ester as wax body and
b) 0.5% to 3.0% by weight, based on the aqueous dispersion, of a fatty acid partial glyceride and
c) 8% to 15% by weight, based on the aqueous dispersion, of an anionic surfactant selected from the group formed by fatty alcohol ether sulfates and
d) an amphoteric surfactant selected from the group formed by betaines,
wherein the ethylene glycol fatty acid ester (a) is formed by stearic acid or a mixture of fatty acids comprising 85-100% by weight, based on fatty acid, of stearic acid;
wherein the average particle diameter of (a) is in the range from 1 to 4 μm;
wherein the wax dispersion does not result in pearlescence; and
wherein the wax dispersion has a viscosity below 8000 mPas according to Brookfield: 23° C., spindle 5, 10 rpm.

18. An aqueous wax dispersion suitable as opacifier and/or conditioner for cosmetic formulations, comprising
a) 20% to 35% by weight, based on the aqueous dispersion, of an ethylene glycol fatty acid ester as wax body and
b) 0.5% to 3.0% by weight, based on the aqueous dispersion, of a fatty acid partial glyceride and
c) 8% to 15% by weight, based on the aqueous dispersion, of an anionic surfactant selected from the group formed by fatty alcohol ether sulfates and
d) an amphoteric surfactant selected from the group formed by betaines,
wherein the ethylene glycol fatty acid ester (a) is formed by stearic acid or a mixture of fatty acids comprising 85-100% by weight, based on fatty acid, of stearic acid;
wherein the average particle diameter of (a) is in the range from 1 to 4 μm;
wherein the wax dispersion does not result in pearlescence; and
wherein the wax dispersion has a viscosity from 3000 to 6000 mPas according to Brookfield: 23° C., spindle 5, 10 rpm).

Assignees

• Basf Se

Inventors

• Nieendick Claus
• Mauer Werner
• Becker Anke
• Cornelsen Sybille

Classifications

• A61Q5/12

  Preparations containing hair conditioners · CPC title

• A61K8/463

  containing sulfuric acid derivatives, e.g. sodium lauryl sulfate · CPC title

• A61K8/44

  Aminocarboxylic acids or derivatives thereof, e.g. aminocarboxylic acids containing sulfur; Salts; Esters or N-acylated derivatives thereof · CPC title

• A61K8/04

  Dispersions; Emulsions · CPC title

• A61K2800/596

  Mixtures of surface active compounds · CPC title