Process for the permanent deformation of keratinous matter

Details Process for the permanent deformation of keratinous matter Process for the permanent deformation of keratinous matter

1997-10-21

1999-11-23

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Live hair or scalp treating compositions

Permanent waving or straightening

424 702, A61K 706

Patent

active

059895349

ABSTRACT:
The invention relates to a new process for the treatment of keratinous matter, in particular hair, with a view to obtaining permanent deformation of the latter, in particular in the form of permanent-waved hair, the said process being characterized in that it contains the following stages: (i) a composition containing cysteine and/or cysteamine and/or one of their salts is applied on the keratinous matter to be treated, the pH of the said composition being between 9 and 10 when the latter contains cysteine or between 8 and 9 when the latter contains cysteamine, the means (rollers) necessary for placing the keratinous matter under mechanical tension being used before, during or after the said application, (ii) the keratinous matter, thus treated, is then subjected to a heat treatment (heating) carried out at a temperature of between 30 and 60.degree. C., (iii) the keratinous matter, thus treated, is then rinsed, (iv) the keratinous matter, thus rinsed, is then allowed to rest, (v) and, finally, the keratinous matter, thus allowed to rest, is separated from the tensioning means used in Stage (i). The process according to the invention makes it possible, among other advantages, to dispense with the use of oxidizing (fixation) agents.

REFERENCES:
patent: 4947878 (1990-08-01), Crews et al.
patent: 5101841 (1992-04-01), Crews et al.
patent: 5208014 (1993-05-01), Dubief et al.
patent: 5332570 (1994-07-01), Bergstrom et al.
Derwent Abstract of FR-A-2683999, May 1993.
Derwent Abstract of EP-A-0320612, Jun. 1989.

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