| 摘要 |
PURPOSE:A polyurethane composition of improved adhesiveness to, especially, metals or plastics, containing a polyurethane having acrylic and trialkoxysilane groups. CONSTITUTION:The titled composition comprising a urethane polymer obtained by reacting an NCO-terminated prepolymer prepared by reacting a polycaprolactone and/or a copolyester polyol of caprolactone with an organic polyisocyanate with a hydroxyalkyl acrylate of formula I (wherein R1 is H or CH3, R2 is a 2-5C alkylene), e.g., hydroxyethyl methacrylate, and a trialkoxysilane of formula II (wherein X is H or S, R3 is H, alkyl, aminoalkyl, allyl or aryl, R4 is alkylene or arylene, R5 is alkyl, these alkyls and alkylenes are of 1-3C), e.g., gamma-aminopropyltriethoxysilane.
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