| abstract |
PURPOSE: To provide the titled novel polymer useful for rubbery sealing materials, ultraviolet-curing type adhesives, coating materials, etc., constituted by specific structure having mercapto groups at its both ends. n CONSTITUTION: A reaction is carried out at 50W250°C in a solvent such as toluene, between, e.g., a polyester polyol of formula I and mercaptoalkanic acid such as mercaptoacetic acid so as to be 0.8W1.2 in the stoichiometrically molar ratio of the OH/COOH to obtain the objective polymer of formula II (R 1 is 1W6C divalent hydrocarbon, R 2 is 1W12C divalent hydrocarbon or ≤4C divalent organic group containing thioether bond; m and n are each 3W200; lis 0W20). n COPYRIGHT: (C)1987,JPO&Japio |