PRODUCTION OF POLY-EPSILON-CAPROLACTONE, AND HIGH-MOLECULAR-WEIGHT POLY-EPSILON-CAPROLACTONE OBTAINABLE THEREBY

摘要

PURPOSE: To produce poly-ε-caprolactones having various wt. average mol.wts., including one having a very high mol.wt., in a very high efficiency by continuously polymerizing ε-caprolactone in the molten state in an extruder while using a specific polymn. initiator. ;CONSTITUTION: The objective polymer is obtd. by continuously polymerizing ε-caprolactone in the molten state in an extruder while using an aluminum alkoxide (pref. aluminum triisopropoxide) as a polymn. initiator. Pref., the polymn. is conducted at 130-180°C for an average dwell time of 15 min or less with an extruder having two screws rotating together. Pref., the resultant polymer is a homopolymer of ε-caprolactone having a wt. average mol.wt. of 115,000-200,000 and a ratio of Mw/Mn of 2.2 or higher.;COPYRIGHT: (C)1995,JPO