Resin

Classification:

Epoxy resins have secondary hydroxyl groups and epoxy groups, and secondary hydroxyl groups can react with isocyanates. Epoxy resin is directly added to the hydroxyl group-containing component of the polyurethane adhesive as a polyol. Using this method, only the hydroxyl group participates in the reaction, and the epoxy group fails to react.

Keywords: styrene-butadiene latex, butyl latex, carboxylated styrene-butadiene latex

Consult

Product Description

Use the carboxyl group of the acid resin to open the epoxy ring, and then react with the isocyanate in the polyurethane adhesive. It is also possible to dissolve the epoxy resin in ethyl acetate, add phosphoric acid to heat the reaction, and add its adduct to the polyurethane adhesive to improve the initial adhesion, heat resistance and hydrolysis stability of the adhesive. Alcohol amines or amines can also be used to react to form polyols, and the presence of tertiary nitrogen atoms in the adducts can accelerate the NCO reaction.

Using epoxy resin as the polyol component combines the advantages of polyurethane and epoxy resin, and has good bonding strength and chemical resistance. The epoxy resin used in the manufacture of polyurethane adhesives generally uses EP-12 and EP-13 , EP-16 and EP-20 and other varieties.

Epoxy resin