Drug – bio-affecting and body treating compositions – Live hair or scalp treating compositions – Permanent waving or straightening
Patent
1994-12-08
1997-06-10
Gardner-Lane, Sally
Drug, bio-affecting and body treating compositions
Live hair or scalp treating compositions
Permanent waving or straightening
424 705, 424 702, 132204, 132205, 132206, A61K 706, A61K 709
Patent
active
056372973
ABSTRACT:
An improved, highly effective permanent waving lotion is attained by employing a reducing agent which consists of a lower alkyl ester of cysteine in combination with a thiol compound selected from the group consisting of ammonium salts and glyceryl esters of thioglycolic acid, thiolactic acid and thiopropionic acid. By employing the reducing agent of this invention, the pH level at which the permanent wave is performed can be substantially reduced, thereby improving comfort and reducing adverse reactions. The reducing agent of this invention is employed either as an aqueous solution of the two components or in association with desired additives for imparting additional benefits to the permanently waved hair. Preferably, the reducing agents of the present invention are employed in a permanent waving lotion having a pH ranging between about 5.0 and 9.5.
REFERENCES:
patent: 4153681 (1979-05-01), Shiba
patent: 4218435 (1980-08-01), Shiba
patent: 5332570 (1994-07-01), Bergstrom et al.
Zviak, The Science of Hair Care, pp. 189-203 1986.
Borish Edward
Fleitas Adalberto
Kubo Sanae
Savaides Andrew
Schultz Thomas M.
Gardner-Lane Sally
Shiseido Co. Ltd.
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