Waterborne polyurethane shoe adhesive and preparation method thereof

Abstract

The invention discloses waterborne polyurethane shoe adhesive and a preparation method thereof and relates to adhesive. The adhesive comprises toluene diisocyanate, polyethyleneglycol, 2,2-dimethylol propionic acid, N-(2-aminoethyl)-2-aminoethyl sulfonate, epoxide resin, diacetone acrylamide, adipic dihy drazides, triethylamine, quadrol, acrylic hydroxy ester monomer, acrylic ester monomer and the like. The preparation method comprises steps of adding butanone, the polyethyleneglycol, the 2,2-dimethylol propionic acid, the toluene diisocyanate and a catalyst into a container, adding the epoxide resin and obtaining a polyurethane solution; adding acrylic hydroxy ester, adding the acrylic ester monomer, the diacetone acrylamide and the triethylamine and obtaining the polyurethane solution; adding the N-(2-aminoethyl)-2-aminoethyl sulfonate, conducting chain extension, adding the quadrol and obtaining the polyurethane solution; adding water and obtaining the polyurethane solution; addinga butanone solution with the initiator, conducting reduced pressure distillation and obtaining polyurethane acrylate (PUA) composite emulsion; and adding an adipic dihy drazides aqueous solution and obtaining a product.

Description

technical field [0001] The invention relates to an adhesive, in particular to a water-based polyurethane shoe adhesive and a preparation method thereof. Background technique [0002] my country is the largest producer, consumer and exporter of footwear products in the world, with an annual output of several billion pairs of shoes, accounting for more than 50% of the total global shoe production. China consumes more than 2 billion pairs of shoes every year, surpassing the United States and ranking first in the world. There are more than 20,000 shoe-making enterprises in China, of which more than 80% of the shoes produced are adhesive shoes, and the consumption of shoe glue is more than 200,000 tons. The use of adhesives has greatly improved the production efficiency of the shoe industry. [0003] The development of shoe adhesives has roughly gone through four generations: the first generation of ordinary neoprene adhesives appeared in the 1930s, which basically met the need...

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of water-based polyurethane adhesive for shoes with higher solid content and better adhesion for existing water-based polyurethane with low solid content, poor water resistance and low bonding strength. Preparation

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