Composition for permanent waving of human hair

Details Composition for permanent waving of human hair Composition for permanent waving of human hair

1994-02-14

2000-01-25

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Live hair or scalp treating compositions

Permanent waving or straightening

424 7019, 424 7021, 424 7031, 424 705, 132210, A61K 709

Patent

active

060175192

ABSTRACT:
This invention refers to a composition for permanent waving of human hair, containing thioglycolic acid or the salts thereof, preferably the ammonium salt, and comprising two compositions which are kept separate until application, whereof a Composition (A) contains at least an amino acid hydrochloride and at least one polyol or the methyl and ethyl ethers thereof, preferably 1,2-propanediol in aqueous solution, having a pH-value of preferably between about 4.5 and 6.5, and a Composition (B) which is kept separate from said Composition (A) until use contains ammonium carbonate, ammonium hydrogen carbonate, and (or) ammonium carbamate as alkalizing agent(s), having a pH-value between about 8 and 9.5, and both compositions are mixed before application whereby a pH-value between about 7 and 8 is obtained. The compositions, which are kept separate, present outstanding stability; upon application after admixture optimal waving performance and, at the same time, gentle treatment of the hair is achieved.

REFERENCES:
patent: 3823232 (1974-07-01), Galerne
patent: 4459284 (1984-07-01), Azuma
patent: 4855130 (1989-08-01), Konrad
patent: 5116608 (1992-05-01), Yoshioka
patent: 5223252 (1993-06-01), Kolc
patent: 5332570 (1994-07-01), Bergstrom

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