# US 7,608,115 B2 · Process for treating keratin fibres by applying heat

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- Number: US 7,608,115 B2
- Document ID: US7608115B2
- Status: Granted
- Kind: B2
- Application number: 10/556,044
- Filed: 2004-04-30
- Published: 2007-08-02
- Granted: 2009-10-27
- Earliest claimed: 2003-05-09
- Assignees: L'oreal
- Inventors: Roland De La Mettrie
- Web page: https://patentgrep.com/patent/US7608115B2

## CPC

- A61K 8/027: {Fibers; Fibrils}
- A45D 7/02: thermal
- A61K 8/02: characterised by special physical form
- A61K 8/4946: {Imidazoles or their condensed derivatives, e.g. benzimidazoles}
- A61K 8/8152: {Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers}
- A61Q 5/065: {Preparations for temporary colouring the hair, e.g. direct dyes}
- A61Q 5/10: Preparations for permanently dyeing the hair
- A45D 1/00: Curling-tongs, i.e. tongs for use when hot; Curling-irons, i.e. irons for use when hot; Accessories therefor
- A61K 2800/24: Thermal properties
- A61K 2800/42: Colour properties
- A61K 2800/54: Polymers characterized by specific structures/properties
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- A45D: HAIRDRESSING OR SHAVING EQUIPMENT (wigs, toupees or the like A41G3/00, A41G5/00; hairdressers' chairs A47C1/04; hair cutting appliances, razors B26B); EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS

## Abstract

The present invention relates to a process for treating keratin fibers, which comprises the application to the keratin fibers of a hair composition comprising at least one active agent chosen from hair dyes, oxidizing agents and cationic conditioners, followed by the application to the fibers of a heating iron whose temperature is greater than or equal to 60° C. The invention also relates to a composition comprising at least one superabsorbent polymer and at least-one active agent chosen from hair dyes, oxidizing agents and cationic conditioners.

## Claims

### Claim 1

A process for treating keratin fibers, comprising:
applying to the keratin fibers at least one hair composition comprising, in a medium that is suitable for dyeing fibers, at least one active agent chosen from:
at least one direct dye;
at least one oxidation base;
at least one coupler; and
at least one oxidizing agent, and
then heating the fibers coated with the hair composition, using a heating iron whose temperature is greater than or equal to 60° C.

### Claim 2 (depends on 1)

The process according to claim 1, wherein the temperature of the heating iron ranges from 60 to 220° C.

### Claim 3 (depends on 2)

The process according to claim 2, wherein the temperature of the heating iron ranges from 120 to 200° C.

### Claim 4 (depends on 1)

The process according to claim 1, wherein the at least one oxidation base is chosen from para-phenylenediamines, bis(phenyl)alkylened iamines, para-aminophenols, ortho-aminophenols, heterocyclic bases, and the addition salts thereof.

### Claim 5 (depends on 1)

The process according to claim 1, wherein the at least one coupler is chosen from meta-phenylenediamines, meta-aminophenols, meta-diphenols, naphthalene-based and heterocyclic couplers, and the addition salts thereof.

### Claim 6 (depends on 1)

The process according to claim 1, wherein the at least one direct dye is chosen from nitrobenezene dyes, azo direct dyes, methine direct dyes, and is optionally of a nonionic, anionic or cationic nature.

### Claim 7 (depends on 1)

The process according to claim 1, wherein the at least one oxidizing agent is chosen from hydrogen peroxide, urea peroxide, alkali metal bromates, persalts, peracids and 2-electron or 4-electron oxidase enzymes.

### Claim 8 (depends on 1)

The process according to claim 1, wherein the at least one hair composition further comprises at least one cationic conditioner chosen from cationic polymers, cationic proteins, cationic protein hydrolysates and cationic surfactants, and mixtures thereof.

### Claim 9 (depends on 8)

The process according to claim 8, wherein the cationic polymers are chosen from those containing units comprising primary, secondary, tertiary and/or quaternary amine groups, which either may form part of the main polymer chain or may be borne by a side substituent directly attached thereto.

### Claim 10 (depends on 8)

The process according to claim 8, wherein the cationic polymers are chosen from cationic cyclopolymers, cationic polysaccharides and quaternary polymers of vinylpyrrolidone and of vinylimidazole, and mixtures thereof.

### Claim 11 (depends on 10)

The process according to claim 10, wherein the cationic cyclopolymers are chosen from diallyldimethylammonium chloride homopolymers and copolymers of diallyldimethylammonium chloride and of acrylamide.

### Claim 12 (depends on 10)

The process according to claim 10, wherein the cationic polysaccharides are chosen from hydroxyethylcelluloses that have reacted with an epoxide substituted with a trimethylammonium group.

### Claim 13 (depends on 10)

The process according to claim 10, wherein the cationic polysaccharides are chosen from guar gums modified with a 2,3-epoxypropyltrimethylammonium salt.

### Claim 14 (depends on 8)

The process according to claim 8, wherein the cationic surfactants are chosen from:
A) the quaternary ammonium salts of general formula (XXII) below:
wherein:
X− is an anion chosen from halides, (C2-C6)alkyl sulphates, phosphates, alkyl or alkylaryl sulphonates, and anions derived from organic acids, and
i) the radicals R1 to R3, in which may be identical or different, are chosen from linear or branched aliphatic radicals containing from 1 to 4 carbon atoms, and from aromatic radicals, optionally comprising hetero atoms; and R4 is a linear or branched alkyl radical containing from 16 to 30 carbon atoms;
ii) the radicals R1, and R2, which may be identical or different, are chosen from linear or branched aliphatic radicals containing from 1 to 4 carbon atoms, and from aromatic radicals, optionally comprising hetero atoms; and
iii) the radicals R3 and R4, which may be identical or different, are chosen from linear or branched C12 to C30 alkyl radicals, said radicals comprising at least one ester or amide function;
B) the quaternary ammonium salts of imidazolinium;
C) the diquaternary ammonium salts of formula (XXIV):
wherein:
R5 is an aliphatic radical containing from 16 to 30 carbon atoms,
R10, R11, R12, R13 and R14, which may be identical or different, are each chosen from hydrogen and C1 to C4 alkyl radicals,
and X− is an anion chosen from halides, acetates, phosphates, nitrates, and methyl sulphates;
D) the quaternary ammonium salts containing at least one ester function, of formula (XXV) below:
wherein:
R15 is chosen from C1-C6 alkyl radicals and C1-C6 hydroxyalkyl or dihydroxyalkyl radicals;
R16 is chosen from:
radical
a linear or branched, saturated or unsaturated C1-C22 hydrocarbon-based radical R20,
a hydrogen atom,
R18 is chosen from:
a radical
a linear or branched, saturated or unsaturated C1-C6 hydrocarbon-based radical R22, and
a hydrogen atom,
R17, R19 and R22, which may be identical or different, are each chosen from linear or branched, saturated or unsaturated C7-C22 hydrocarbon-based radicals;
n, p and r, which may be identical or different, are integers ranging from 2 to 6;
y is an integer ranging from 1 to 10;
x and z, which may be identical or different, are integers ranging from 0 to 10;
X− is a simple or complex, organic or mineral anion;
with the provisos that the sum x+y+Z is from 1 to 15, that when x is 0, then R16 denotes R20 and that when z is 0, then R18 denotes R22.

### Claim 15 (depends on 14)

The process according to claim 14, wherein the quaternary ammonium salts of imidazolinium are of formula Q(XIII) below:
wherein:
R5 is an alkenyl or alkyl radical containing from 8 to 30 carbon atoms;
R6 is a hydrogen atom, a C1-C4 alkyl radical or a C8 to C30 alkenyl or alkyl radical;
R7 is a C1 -C4 alkyl radical;
R8 is a hydrogen atom or a C1 -C alkyl radical; and
X− is an anion chosen from halides, phosphates, acetates, lactates, alkyl sulphates, alkyl sulphonates, and alkylaryl sulphonates.

### Claim 16 (depends on 1)

The process according to claim 1, wherein the concentration of the at least one active agent in the at least one hair composition ranges from 0.001% to 20% by weight of the composition.

### Claim 17 (depends on 1)

The process according to claim 1, wherein the at least one hair composition further comprises at least one superabsorbent polymer.

### Claim 18 (depends on 1)

The process according to claim 1, wherein there is a waiting period between applying the at least one hair composition and the heating of the keratin fibers.

### Claim 19 (depends on 1)

The process according to claim 1, wherein the hair fibers are rinsed between applying the at least one hair composition and the heating of the keratin fibers.