Crosslinking of hair thiols
First Claim
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1. A process for treating keratinous material in which the disulfide linkages have been disrupted to form free sulfhydryl groups which comprises:
- contacting the keratinous material with a crosslinking reagent selected from the group consisting of (1) diimidates of the formula;
space="preserve" listing-type="equation">R.sub.1 --O--C(NH)--R--C(NH)--O--R.sub.1and (2) disuccinimidyl compounds of the formula;
##STR2## and mixtures thereof, wherein R represents a connecting moiety and R1 represents an alkyl of 1 to 10 carbons, at a temperature and pH to form crosslinkages and insufficient to substantially denature the protein of the keratlnous material.
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Abstract
Keratinous material, such as human hair, in which disulfide linkages have been ruptured to form disulfide linkages can be set using diimidates, and disuccinimidyl compounds as disclosed herein.
46 Citations
24 Claims
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1. A process for treating keratinous material in which the disulfide linkages have been disrupted to form free sulfhydryl groups which comprises:
- contacting the keratinous material with a crosslinking reagent selected from the group consisting of (1) diimidates of the formula;
space="preserve" listing-type="equation">R.sub.1 --O--C(NH)--R--C(NH)--O--R.sub.1and (2) disuccinimidyl compounds of the formula;
##STR2## and mixtures thereof, wherein R represents a connecting moiety and R1 represents an alkyl of 1 to 10 carbons, at a temperature and pH to form crosslinkages and insufficient to substantially denature the protein of the keratlnous material. - View Dependent Claims (2, 3, 4, 5, 17, 18, 20, 21)
- contacting the keratinous material with a crosslinking reagent selected from the group consisting of (1) diimidates of the formula;
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6. A hair waving system comprising a composition for reducing disulfide bonds to form sulfhydral groups in hair and a crosslinking composition containing a crosslinking reagent selected from the group consisting of (1) diimidates of the formula:
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space="preserve" listing-type="equation">Ri.sub.1 --O--C(NH)--R--C(NH)--O--R.sub.1and
space="preserve" listing-type="equation">(2) disuccinimidyl compounds of the formula;
##STR3## and mixtures thereof, wherein R represents a connecting moiety and R.sub.1 represents an alkyl of 1 to 10 carbons. - View Dependent Claims (7, 19, 22)
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- 8. A process for treating keratinous material in which the disulfide linkages have been disrupted by the action of a reducing agent forming free sulfhydryl groups comprising contacting the said keratinous material with a crosslinking reagent R1 --O--C(NH)--R--C(NH)--O--R1 wherein R represents a connecting moiety and R1 represents an alkyl of 1 to 10 carbon atoms, the process being conducted under conditions sufficient to form crosslinkages and insufficient to substantially denature the protein of the keratinous material.
- 9. A process for treating keratinous material in which the disulfide linkages have been disrupted by the action of a reducing agent forming free sulfhydryl groups comprising contacting the said keratinous material with a crosslinking reagent ##STR4## wherein R represents a connecting moiety, the process being conducted under conditions sufficient to form crosslinkages an insufficient to substantially denature the protein of the keratinous material.
Specification