POLY(OXYALKYLENE)-POLYESTER-POLY(SULFIDE)-POLYTHIOL PREPARED BY ESTER INTERCHANGE

摘要

Poly(oxyalkylene)-polyester-poly(sulfide)-polythiol is prepared by ester interchange between an alkyl mercaptocarboxylate/dialkyl thiodicarboxylate mixture and a poly(oxyalkylene)-polyol. The resulting polymer is a liquid material having more than two, preferably at least three pendant thiol groups. This polymer exhibits exceptional stability and is well suited for sealant applications.