| 摘要 |
A polymer having a molecular weight less than 6000 which is soluble in water at basic pH values and having the formula <FORM:1002455/C3/1> where R is a C2- 4 alkylene radical which may contain as substituent a C1- 4 alkyl, carboxyl or carbalkoxy group; R1 is H or a C1- 4 alkyl, and R11 and R111 are R1, aryl, aryloxy or a C1- 4 alkoxy, and n is 1-24 is prepared by reacting a copolymer containing <FORM:1002455/C3/2> with an aminothiol of formula HS-R-NHR1, where R and R1 are as before. The polymer may be produced by copolymerizing maleic anhydride with styrene or ethylene and then reacting the copolymer with b -mercapto-ethylamine or cysteine. The thiolated polymer, e.g. 1-20%, may be compounded with urea, ammonia, and water.ALSO:Keratinic fibres are impregnated with a solution e.g. 1-20%, of a polymer of molecular weight less than 6,000 which is soluble in water at baric pH values and which has the formula <FORM:1002455/D1-D2/1> where R is a C2-4 alkylene which may be substituted, R1 is H or a C1-4 alkyl and R11 and R111 are R1, aryl, arylotz or C1-4 alkoxy and n is 1-24. The solution may also contain urea and ammonia. The fibre may be wool or natural hair on the human head and may be constrained during treatment to a desired configuration. |
