| 摘要 |
A composition for treating keratinic fibres comprises an aqueous solution of a polymer containing thiol groups and of an organic disulphide. Preferably the polymer containing thiol groups has the general formula <FORM:1067065/C3/1> in which R is an alkylene radical, preferably of 2 to 4 carbon atoms, which may be unsubstituted or substituted by alkyl of 1 to 4 carbon atoms, carboxyl or carbalkoxy; R1 is hydrogen or alkyl of 1 to 4 carbon atoms; R11 and R111, which may be the same or different, each represents hydrogen, alkyl of 1 to 4 carbon atoms, phenyl or alkoxy of 1 to 4 carbon atoms; and n is an integer greater than 1 and less than 25 obtained by the process described in Specification 1,002,455. The disulphide is of the formula R1SSR2 in which R1 and R2 which may be the same or different, each represents an alkyl radical of 1 to 4 carbon atoms having a water-solubilizing substituent. The composition may also contain ammonia or an organic amine.ALSO:A method of treating keratine fibres comprises (a) applying to the fibres an aqueous solution of a polymer containing thiol groups and of an organic disulphide, said polymer and said disulphide being such that they are capable of reacting together under the conditions of use, to reduce said disulphide to the corresponding mocaptan and to oxidise said polymer to the corresponding polysulphide; (b) shaping the keratinic fibres after reduction of their disulphide linkages by said mercaptan is substantially complete; (c) allowing said reduced linkages to oxidise to the disulphide form. The polymer is preferably that described in Specification 1,002,455 (see Division C3). The solution is preferably applied at a pH of from 8.5 to 9.5. Hair is permanently waved to applying the solution to the locks of the hair, winding the locks of hair on rollers, again impregnating the locks with the solution, leaving the air rolled while the solution reacts, removing the hair from the rollers, and rinsing and drying the hair. The rollers in which the hair is wound are preferably heated. The solution may also contain swelling and penetrating agents.
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