PU adhesive is a common adhesive widely used in various fields. Its chemical name is polyurethane adhesive, made from the reaction of polyols and isocyanates, among other raw materials. PU adhesive possesses several properties, including moderate bond strength, good aging resistance, and ease of use.
The main components of PU adhesive include polyols, isocyanates, solvents, and additives. Polyols and isocyanates undergo a polymerization reaction under specific conditions to form a polyurethane structure. Solvents are used to adjust the viscosity of the adhesive, while additives are used to improve certain properties of the adhesive, such as increasing flexibility or accelerating curing speed. The chemical reaction process typically takes place at room temperature or under heating conditions, and the reaction rate is affected by ambient temperature and humidity.
