Composition and method for permanent shaping of hair
AssigneeWella Aktiengesellchaft
InventorsGunther Lang, Gerhard Maresch
Life of this patent
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Abstract
The composition for permanent shaping of hair based on a hair keratin-reducing agent contains N-glycyl-L-cysteine and/or L-cysteinyl-glycine as the hair keratin-reducing agent. The N-glycyl-L-cysteine and/or L-cysteinyl-glycine is advantageously the only hair keratin-reducing substance present. The compositions have a preferred pH range of 6.5 to 9.0 and contain from 8 to 30 percent by weight of the N-glycyl-L-cysteine and/or L-cysteinyl-glycine. Use of this composition for permanent shaping of hair avoids a troublesome white deposit or coating on the hair which occurs when cysteine-containing hair shaping compositions are used.
Claims5
Process for permanent shaping of hair comprising the steps of:
- a) putting the hair in a predetermined shape;
- b) treating the hair with a hair shaping composition containing at least one of N-glycyl-L-cysteine and L-cysteinyl-glycine as effective hair keratin-reducing agent;
- c) rinsing the hair treated in step b) with water;
- d) then subjecting the hair to an oxidative after-treatment;
- e) rinsing the hair with water, putting the hair in a water wave according the needs of the hair and then drying the hair.
An aqueous composition for permanent shaping of hair having a pH of 6.5 to 9.0 and containing water;
- at least one pH-setting and buffering ingredient selected from the group consisting of ammonium hydrogen carbonate, ammonia and monoethanolamine;
- from 0.2 to 30 percent by weight of at least one additive ingredient and from 8 to 30 percent by weight of at least one keratin-reducing agent selected from the group consisting of N-glycyl-L-cysteine and L-cysteinyl-glycine, wherein said at least one additive ingredient is selected from the group consisting of perfume oils, thickeners, wetting agents, emulsifiers, turbidity causing agents, stabilizers, solvating agents, dyes, hair conditioning ingredients and hair care ingredients.
Dependencies are inferred from the claim text.