Polyols are the main raw materials for preparing polyurethane adhesives, and their properties vary due to their different molecular structures.
① The polyurethane adhesive synthesized using structured polyols has strong crystallinity and high adhesive strength;
② Polyurethane adhesives prepared from polyols with side chain methyl groups have good glossiness and brightness;
③ Polyurethane adhesives prepared from polyether polyols have lower glass transition temperature, better flexibility, and water resistance.
Polyurethane adhesives with different performance can be synthesized by selecting polyols with different relative molecular weights and molecular structures.