Abstract The invention relates to compositions for the treatment of filamentous keratins, for example, to cosmetic compositions for the treatment of human hair and compositions for modifying animal hair or fur. The compositions are made up of water soluble peptide products of partial hydrolysis of keratinaceous materials, such as hog hair, resulting from hydrolysis using acids under conditions which, while breaking down the complex proteins, will leave a substantial portion of the disulfide linkages present in the keratinaceous materials intact. Filamentous keratins have the peptide products chemically bonded thereto by a two step process wherein disulfide linkages of both the peptide products and the filamentous keratins are split by the action of a reducing agent and disulfide linkages are then reformed by action of an oxidizing agent whereby at least some of the sulfhydryl groups of the peptide products formed by the action of the reducing agent are bonded to sulfhydryl groups of the filamentous keratins.
A METHOD OF TREATING HAIR FIBERS TO PROVIDE A PERMANENTLY BONDED PROTECTIVE AND CONDITIONING CONTENT OF DISULFIDECONTAINING PROTEINACEOUS AGENT COMPRISING CONTACTING THE HAIR WITH AN EFFECTIVE AMOUNT OF AN AQUEOUS COMPOSITION CONTAINING WATER HAVING DISSOLVED THEREIN FROM 4 PERCENT TO 8 PERCENT BY WEIGHT OF AMMONIUM THIOGLYCOLATE REDUCING AGENT AND FROM 5 PERCENT TO 25 PERCENT BY WEIGHT A WATER SOLUBLE KERATIN POLYPEPTIDE HYDROLYZATE HAVING AN INTACT DISULFIDE UNIT CONTENT I THE RANGE BETWEEN 15 AND 49 MOLES OF DISULFIDE LINKAGES PER 100,000 GRAMS OF HAIR, SAID HYDROLYZATE BEING PRODUCED BY HYDROLYZING KERATIN-CONTAINING HAIR AT 100*-160=C. IN THE PRESENCE OF PHOSPHORIC ACID HAVING A CONCENTRATION OF 4 PERCENT TO 85 PERCENT UNTIL THE DISULFIDE CONTENT IS IN THE RANGE SPECIFIED WHILE MAINTAINING A PH LESS THAN 4 THROUGHOUT THE HYDROLYSIS REACTION, DRAINING OFF SAID AQUEOUS COMPOSITION, AND THEN CONTACTING SAID HAIR WITH AN EFFECTIVE AMOUNT OF AN AQUEOUS SOLUTION OF OXIDIZING AGENT.
Claim 2
Independent Claim
152 words
A METHOD OF TREATING HAIR FIBERS TO PROVIDE A PERMANENTLY BONDED PROTECTIVE AND CONDITIONING CONTENT OF DISULFIDECONTAINING PROTEINACEOUS AGENT COMPRISING CONTACTING THE HAIR WITH AN EFFECTIVE AMOUNT OF AN AQUEOUS COMPOSITION CONTAINING WATER HAVING DISSOLVED THEREIN FROM 4 PERCENT TO 8 PERCENT BY WEIGHT OF AMMONIUM THIOGLYCOLATE REDUCING AGENT AND FROM 5 PERCENT TO 25 PERCENT BY WEIGHT A WATER SOLUBLE KERATIN POLYPEPTIDE HYDROLYZATE HAVING AN INTACT DISULFIDE UNIT CONTENT I THE RANGE BETWEEN 15 AND 49 MOLES OF DISULFIDE LINKAGES PER 100,000 GRAMS OF HAIR, SAID HYDROLYZATE BEING PRODUCED BY HYDROLYZING KERATIN-CONTAINING HAIR AT 100*-160=C. IN THE PRESENCE OF PHOSPHORIC ACID HAVING A CONCENTRATION OF 4 PERCENT TO 85 PERCENT UNTIL THE DISULFIDE CONTENT IS IN THE RANGE SPECIFIED WHILE MAINTAINING A PH LESS THAN 4 THROUGHOUT THE HYDROLYSIS REACTION, DRAINING OFF SAID AQUEOUS COMPOSITION, AND THEN CONTACTING SAID HAIR WITH AN EFFECTIVE AMOUNT OF AN AQUEOUS SOLUTION OF OXIDIZING AGENT.
Claim 3
Dependent Claim
24 words
The method as recited in claim 1 in which said oxidizing agent is selected from the group consisting of sodium bromate and hydrogen peroxide.