Print pastes

摘要

Print pastes for textiles and other substrates comprise an oil-in-water emulsion containing a pigment or vat dye and, as a binder, a cross-linkable water-soluble copolymer of:-(1) 5 to 60 parts by weight of an N-methylol alkyl ether of acrylamide or methacrylamide wherein the alkyl moiety of the ether group has 8 to 18 carbon atoms; (2) 3 to 20 parts by weight of a polymerizable a ,b - ethylenically unsaturated mono- or di-carboxylic acid; and (3) 20 to 75 parts by weight of at least one other ethylenically unsaturated monomer; at least 50% of the free carboxylic groups of the copolymer being neutralized by ammonia or a nitrogenous organic base (e.g. methylamine, triethylamine, dimethylethanolamine, triethanolamine, piperidine or morpholine). Examples of monomer (1) are N - (2 - ethylhexoxymethyl) - acrylamide and N - (2 - octylhexoxymethyl) - methacrylamide. Suitable monomers (2) include crotonic, citraconic, itaconic, mesaconic, maleic, fumaric and, preferably, acrylic and methacrylic acids. Monomers (3) include styrene, esters of unsaturated carboxylic acids, vinyl esters (including versatic esters), N-substituted unsaturated amides, dienes, vinyl and vinylidene chloride, vinyl ethyl ketone, vinyl ethyl ether, acrylo-methacrylo-nitriles, acrylamide and methacrylamide, N-vinyl pyrrolidone, N-vinyl caprolactam, monoesters of polyhydric alcohols and unsaturated carboxylic acids, monovinyl ethers of polyhydric alcohols, allyl alcohol and bicycloheptene compounds containing hydroxy groups. White spirit or mineral spirit gasoline fractions may be used as the oil phase of the emulsion. Pigments exemplified are red iron oxide and copper phthalocyanine. The print pastes may optionally include cross-linking or curing agents, e.g. urea-formaldehyde precondensates, melamine-formaldehyde precondensates or ammonium thiocyanate.ALSO:Print pastes for textiles, e.g. cotton, cloth, and other substrates comprise an oil-in-water emulsion containing a pigment or vat dye and, as a binder, a cross-linkable water-soluble copolymer of:- (1) 5 to 60 parts by weight of an N-methylol alkyl ether of acrylamide or methacrylamide wherein the alkyl moiety of the ether group has 8 to 18 carbon atoms; (2) 3 to 20 parts by weight of a polymerisable a ,b -ethylenically unsaturated mono- or dicarboxylic acid; and (3) 20 to 75 parts by weight of at least one other ethylenically unsaturated monomer; at least 50% of the free carboxylic groups of the copolymer being neutralised by ammonia or a nitrogenous organic base (e.g. methylamine, triethylamine, dimethyl ethanolamine, triethanolamine, piperidine or morpholine). White spirit or mineral spirit gasoline fractions may be used as the oil phase of the emulsion. Pigments exemplified are red iron oxide and copper pathalocyanine. The print pastes may optionally include cross-linking or curing agents, e.g. urea-formaldehyde precondensates, melamine-formaldehyde precondensates or ammonium thiocyanate.