1. Introduction to Polyurethane and Epoxy Glues

1.1 polyurethane (pu) glue polyurethane adhesives are a class of versatile materials characterized by the presence of urethane linkages (-nhcoo-) in their polymer chains. these linkages are formed through the reaction of an isocyanate component (-nco) with a polyol component (-oh). the specific properties of pu adhesives are determined by the types of isocyanates and polyols used, as well as the presence of any additives or…