PRODUCTION OF PATTERN EFFECTS WHEN DYEING OR PRINTING TEXTILE MATERIAL IN THE ABSENCE OF ALKALI OR REDUCING AGENTS

摘要

Prodn.of patterned effects in dyeing or printing textile material in the absence of alkali or reducing agent is carried out as follows. Either (a) the material is pretreated with a cationising agent (I) and dried or (b) the warp yarn is treated with (I) and size dried, then woven with a weft yarn. Then an oxidant is applied in a pattern and, after drying, the material is dyed or printed with reactive, direct, acid, water-soluble sulphur or pigment dyestuffs in the absence of alkali or reducing agent. Preferred Composition (I) is a (quat) reaction prod. of polyethyleneimines of formula H-(CH2-CH2-NH)a . (CH2-CH2-NX)b-H (IA) with bifunctional alkylating agent, pref.of formula A-Z-A (II); a (quat.) reaction prod. of an epichlorohydrin and NH3 or an amine of formula R-NHA' (III); or a polymer consisting (partly) of monomer units of formula H2C=CR3-CH2-+N(R1)(R2)-CH2-CR4=CH2 (IV). In the formulae X is -(CH2-CH2-NH)c-H; a and b are 0-600; (a+b) is 60-600; c is 0-50; A is the radical of an alkylating agent; Z is a direct bond or a divalent bridging gp.; A' is H or 1-5C (hydroxy)alkyl; R is 1-5C (hydroxy)alkyl, -(alkylene-NA')n-alkylene-NHA' or -(alkylene-X-alkylene-NA')n-alkylene-X-alkylene-NHA'; n is 0-5; X is 0 or S; or RA is -alkylene-NH-alkylene; alkylene is 1-6, pref. 2-3C alkylene; R1 and R2 are H, 1-22C alkyl, opt. with -CO-NH- or -NH-CO- in the chain, or 1-4C hydroxyalkyl, pref. 1-10, esp. 1-4C alkyl; R3 and R4 are H or Me; Y is a monovalent anion or one equiv. of a polyvalent anion.