| 摘要 |
1,265,456. Dyeing polyacrylonitrile. FARBENFABRIKEN BAYER A.G. 23 July, 1970 [7 Aug., 1969], No. 35726. Heading D1B. Fibres made from polyacrylonitrile and copolymers of acrylonitrile are dyed with cationic dyes in presence of an N-alkylaminoalkanesulphonic acid or salt of formula I in which R 1 and R 2 are hydrogen or a hydroxyl group, the sum p+q is 1-3, M is hydrogen or an alkali metal or alkaline earth metal atom or an optionally substituted ammonium group, R is a C 10-22 alkyl or C 10-22 alkenyl group, R 3 and R 4 are each a C 1-8 alkyl group optionally substituted by a hydroxyl or carbonamide group, or represents a benzyl group, X<SP>-</SP> is an anion. M is preferably sodium, potassium, magnesium, calcium, ammonium, and ammonium groups derived from monodi- and triethanolamine, X- may be a halide ion or ethyl- or methyl-sulphate or toluene sulphate. |
