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Brief Introduction to polyester polyol
2026-05-23Polyester polyol is one of the core raw materials for preparing polyurethane (PU). It is obtained by dehydration condensation of dicarboxylic acids (adipic acid, phthalic anhydride, etc.) and diols (ethylene glycol, 1,4-butanediol, etc.). The main chain of the molecule contains ester bonds (- COO -), and the end of the molecule has active hydroxyl groups (- OH). The hydroxyl groups can react with
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Briefly introduce polyurethane resin for leather and coatings
2026-05-231. Synthesis principle Generated by addition polymerization of isocyanates (MDI, HDI, etc.) and polyols, the performance is regulated by the ratio of soft and hard segments; Divided into aromatic and aliphatic polyurethanes; The product forms mainly include three systems: solvent based, water-based, and solvent-free.
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