Reducing cosmetic composition for perming the hair, containing cysteamine and/or its N-acetyl derivative and a cationic polymer, and a process for permanent deformation of the hair
AssigneeL'oreal
InventorsClaude Dubief, Christine Dupuis
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Abstract
A reducing cosmetic composition containing an association of a reducing agent and a cationic polymer is described. The reducing agent is cysteamine or one of its salts and/or N-acetylcysteamine, and the cationic polymer is a copolymer of from 45 to 99.5 mole-% of N-vinylpyrrolidone and from 0.5 to 55 moIe-% of nonquaternized dialkyl (C.sub.1 -C.sub.4) aminoalkyl (C.sub.1 -C.sub.18) acrylate or methacrylate. The composition can be used in a process for permanent deformation of the hair in the cold state.
Claims18
A reducing composition for permanently deforming hair in the cold state comprising
- (1) a reducing agent wherein said reducing agent is present at a concentration of between 0.1 and 15% by weight and is selected from the group consisting of cysteamine, a cysteamine salt and N-acetylcysteamine;
- and
- (2) a cationic polymer wherein said cationic polymer is present at a concentration of between 0.1 and 3% by weight and said cationic polymer is a polymer of 45 to 99.5 mole % N-vinylpyrrolidone and 0.5 to 55 mole % non quaternized dialkyl (C.sub.1 14 C.sub.4) aminoalkyl (C.sub.1 -C.sub.18) acrylate or methacrylate.
A process for permanently deforming the hair, comprising the steps of:
- (1) applying a reducing composition to the hair thereby reducing disulfide bonds of keratin, wherein said reducing composition comprises
- (a) a reducing agent, selected from the group consisting of cysteamine, cysteamine salt and N-acetylcysteamine;
- and
- (b) a cationic polymer, of 45 to 99.5 mole % N-vinylpyrrolidone and 0.5 to 55 mole % nonquaternized dialkyl (C.sub.1 -C.sub.4) aminoalkyl (C.sub.1 -C.sub.18) acrylate or methacrylate;
- and then
- (2) applying an oxidizing composition to the hair thereby reforming said disulfide bonds.
Dependencies are inferred from the claim text.