Polyurethane glue belongs to a class of adhesives based on polyurethane polymers. These polymers are formed through the reaction of a polyol (an alcohol containing multiple hydroxyl groups) and an isocyanate (a compound containing the isocyanate functional group, -N=C=O). This reaction, known as polyaddition, creates a polymer chain with urethane linkages (-NH-COO-). The versatility of...