Process for treating straightened keratin fibres

Patent metadata

Field	Value
Publication number	US-9610241-B2
Application number	US-201514936022-A
Country	US
Kind code	B2
Filing date	Nov 9, 2015
Priority date	Jun 1, 2011
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

The present invention relates to a process for treating straightened keratin fibres, in which a composition comprising at least one carboxylic acid in its acid or salified form, at a concentration of greater than or equal to 2%, and at least one non-cellulosic polymer and/or at least one fatty substance, the pH ranging from 3 to 8, is applied to the straightened keratin fibres.

First claim

The invention claimed is:

1. A process for treating straightened keratin fibers, the process comprising:
applying to the straightened keratin fibers a composition comprising:
at least one carboxylic acid in its acid or salified form, wherein the molecular weight of the carboxylic acid is less than 250, and wherein the total amount of carboxylic acid is at least about 2% by weight, relative to the total weight of the composition, and
at least one component chosen from non-cellulosic polymers and fatty substances,

wherein the pH of the composition ranges from about 3 to about 8.

2. The process according to claim 1 , wherein the at least one carboxylic acid chosen from tricarboxylic acids or salts thereof, dicarboxylic acids or salts thereof, amino dicarboxylic acids or salts thereof, monocarboxylic acids or salts thereof, α-hydroxylated carboxylic acids or salts thereof, dihydroxylated carboxylic acids or salts thereof, citric acid, sodium citrate, maleic acid, sodium maleate, succinic acid, sodium succinate, aspartic acid, sodium aspartate, glutamic acid, sodium glutamate, lactic acid, sodium lactate, malic acid, sodium malate, tartaric acid, sodium tartrate, or mixtures thereof.

3. The process according to claim 1 , wherein the carboxylic acid is chosen from citric acid and salts thereof.

4. The process according to claim 1 , wherein the total amount of carboxylic acid in acid or salified form ranges from about 2% to about 50% by weight, relative to the total weight of the composition.

5. The process according to claim 1 , wherein the total amount of carboxylic acid in acid or salified form ranges from about 2% to about 5% by weight, relative to the total weight of the composition.

6. The process according to claim 1 , wherein the composition comprises at least one non-cellulosic polymer chosen from non-ionic, anionic, cationic, amphoteric, or zwitterionic polymers, which are soluble or insoluble in the composition; thickening polymers, fixing polymers, opacifying polymers, conditioning polymers, or mixtures thereof; homopolymers or copolymers containing at least one ethylenically unsaturated monomer, polysaccharides, optionally modified guar gums, optionally modified xanthan gums, polyurethanes, or mixtures thereof.

7. The process according to claim 1 , wherein the composition comprises at least one non-cellulosic polymer in an amount ranging from about 0.01% to about 50% by weight, relative to the total weight of the composition.

8. The process according to claim 1 , wherein the composition comprises at least one non-cellulosic polymer in an amount ranging from about 1% to about 5% by weight, relative to the total weight of the composition.

9. The process according to claim 1 , wherein the composition comprises at least one fatty substance chosen from fatty substances that are liquid at about 25° C. and about 760 mmHg or about 1.013×10 5 Pa.

10. The process according to claim 1 , wherein the composition comprises at least one fatty substance chosen from hydrocarbons, fatty alcohols, fatty esters, silicones, fatty ethers, oils of plant origin, liquid petroleum jelly, linear or branched C 6 -C 16 lower alkanes, liquid esters, liquid fatty alcohols, or mixtures thereof.

11. The process according to claim 1 , wherein the composition comprises at least one fatty substance in an amount ranging from about 0.1% to about 30% by weight, relative to the total weight of the composition.

12. The process according to claim 1 , wherein the composition comprises at least one fatty substance in an amount ranging from about 1% to about 15% by weight, relative to the total weight of the composition.

13. The process according to claim 1 , wherein the composition has a pH ranging from about 3 to about 4.

14. The process according to claim 1 , further comprising leaving the composition on the keratin fibers for a period of time ranging from about 5 minutes to about 2 hours.

15. The process according to claim 1 , further comprising leaving the composition on the keratin fibers for a period of time of about 20 minutes.

16. The process according to claim 1 , wherein the composition is applied to wet hair.

17. The process according to claim 1 , further comprising smoothing the hair with a smoothing iron.

18. A process for reducing hair volume, the process comprising:
applying to straightened keratin fibers a composition comprising:
at least one carboxylic acid in its acid or salified form, wherein the molecular weight of the carboxylic acid is less than 250, and wherein the total amount of carboxylic acid is at least about 2% by weight, relative to the total weight of the composition, and
at least one component chosen from non-cellulosic polymers and fatty substances,

wherein the pH of the composition ranges from about 3 to about 8.

19. A process for increasing the persistence of hair-straightening, the process comprising:
applying to straightened keratin fibers a composition comprising:
at least one carboxylic acid in its acid or salified form, wherein the molecular weight of the carboxylic acid is less than 250, and wherein the total amount of carboxylic acid is at least about 2% by weight, relative to the total weight of the composition, and
at least one component chosen from non-cellulosic polymers and fatty substances,

wherein the pH of the composition ranges from about 3 to about 8.

Assignees

• Oreal

Inventors

• Cabourg Julien
• Plos Grégory
• Feuillette Laëtitia

Classifications

• A61K8/365

  Hydroxycarboxylic acids; Ketocarboxylic acids · CPC title

• A61K8/362

  Polycarboxylic acids · CPC title

• A61Q5/04

  Preparations for permanent waving or straightening the hair · CPC title

• A61Q5/00

  Preparations for care of the hair · CPC title

• A61K2800/884

  Sequential application · CPC title