Process for reducing hair damage upon treatment of hair by heat
A process for reducing hair damage upon treatment of hair by heat comprising the steps of providing a hair care composition comprising a heat-stable silicone material, applying said composition onto hair, providing a heat generating hair care appliance, and treating hair using said appliance; use and kit thereof.
1. A process for reducing hair damage upon treatment of hair by heat comprising the steps of:
(1) providing a leave-in hair care composition comprising a silicone material and a cosmetically acceptable carrier, wherein the silicone material is a polydimethylsiloxane and is stable at a temperature up to 300° C.;
(2) applying onto hair a sufficient amount of the hair care composition for treating hair;
(3) providing a heat generating hair care appliance being a hot surface hair care appliance, wherein the hot surface hair care applicance is a hair straightener;
(4) treating hair at a temperature ranging from about 90° C. to about 250° C. using the heat generating hair care appliance for from about 1 min to about 20 min for drying and/or styling hair;
wherein the polydimethylsiloxane (P) has aminoalkyl groups and has an amine number of at least 0.1 meq/g of polydimethylsiloxane (P), and comprises units of formula I
R 1 a R 2 b SiO (4-a-b)/2 (I),
in which R 1 is methyl, an —OR radical, or an —OH radical,
R 2 are aminoalkyl radicals of formula II
—R 3 —NR 4 R 5 (II),
R 3 is —(CH 2 ) 3 —,
R 4 is H,
R 5 is —(CH 2 ) 2 -NH 2 —,
a is 0, 1, 2 or 3,
b is 0, 1, 2 or 3, and
a+b on average is from 1.5 to 2.5, wherein not more than 9 mol % of the radical R 1 is OH or OR.
2. The process according to claim 1 , wherein the composition further comprises a protonating agent.
3. The process according to claim 1 , wherein the composition further comprises at least one cosmetic hair treatment agent selected from the group consisting of hairstyling polymers, hair-conditioning agents, hair-cleaning agents, and mixtures thereof.
4. The process according to claim 1 , further comprising the step of wetting hair with an aqueous composition before, during and/or after applying the hair care composition.
5. A kit for reducing hair damage upon treatment of hair by heat comprising;
(1) a hair care composition comprising a polydimethylsiloxane (P), wherein the polydimethylsiloxane (P) has aminoalkyl groups and has an amine number of at least 0.1 meq/g of polydimethylsiloxane (P), and comprises units of formula I
R 1 a R 2 b SiO (4-a-b)/2 (I),
in which R 1 is methyl, and —OR radical, or an —OH radical,
R 2 are aminoalkyl radicals of formula II
—R 3 —NR 4 R 5 (II),
R 3 is —(CH 2 ) 3 —,
R 4 is H,
R 5 is —(CH 2 ) 2 -NH 2 —,
a is 0, 1, 2 or 3,
b is 0, 1, 2 or 3, and
a+b on average is from 1.5 to 2.5, wherein not more than 9 mol % of the radical R 1 is OH or OR; and
(2) a heat-generating hair care appliance.