A kind of cross-linking agent for imitating reactive pigment printing and preparation method thereof

Abstract

The invention discloses a cross-linking agent for imitation active pigment printing and a preparation method of the cross-linking agent. A prepolymer, prepared from 70-90 parts of hexamethylene diisocyanate tripolymer, 10-20 parts of polyethylene glycol, 2-4 parts of hydrophilic chain extender, 1-1.5 parts of trimethylolpropane, 30-40 parts of organic solvent and 1-3 parts of polyethylene glycol monomethyl ether, is blocked by 25-35 parts of methyl ethyl ketoxime, neutralized by 1.5-3 parts of triethylamine and dispersed by 160-230 parts of deionized water to obtain a cross-linking agent emulsion. The cross-linking agent has high crockfastness and soaping fastness and does not influence fabric handfeel after printing.

Description

technical field [0001] The invention relates to textile printing and dyeing auxiliaries, in particular to an imitation active pigment printing crosslinking agent and a preparation method thereof. Background technique [0002] Pigment printing is a printing process that uses adhesives to combine insoluble pigment particles into a film and adhere to the surface of the fiber to obtain the desired pattern. It is suitable for fabrics of various fibers and has the characteristics of complete color spectrum, simple operation, and easy modulation. , The pigment printing process does not need to be washed. Compared with dye printing, it has the advantages of energy saving and water saving, but its hand feeling is not as natural and soft as dye printing (such as reactive dye printing), especially in large-area patterns. The feel and fastness of pigment printing products depend on the quality of the adhesive, so in order to improve the effect of pigment printing, it is necessary to use...

AI Technical Summary

Problems solved by technology

However, adding a cross-linking agent to the pigment printing paste will harden the film of the adhesive emulsion, increase the friction coefficient, and often reduce the dry rubbing fastness, and the hand feeling of the printed fabric will become worse, especially in the application When imitating reactive paint printing, the hand feeling of the printed fabric becomes hard especially, which loses the meaning of imitating reactive paint

[0005] CN102816294A patent discloses "a preparation method of a water-based blocked isocyanate cross-linking agent", which is a water-based cross-linking agent used for fabric coating, which is directly blocked after prepolymerization with isocyanate and hydrophilic chain extender, but its From the structural point of view, crosslinking agent molecules are small, and the degree of branching is low, and there are few crosslinking points. When used in pigment printing, the adhesive will make the film hard and brittle, thus affecting the dry rubbing fastness and printing feel.

Its branching is relatively high and has good cross-linking performance, but the molecular weight of polyethylene glycol used as a soft segment is small, and the hand feeling will still become hard after film formation, and the end-capping agent of imidazoles will All are in a solid state, and will remain on the cloth surface and will obviously affect the feel

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