Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Fuminori Kobayashi0
Yasushi Okada0
Hiroyuki Sato0
Fumio Akutsu0
Date of Patent
May 26, 2009
Patent Application Number
10575468
Date Filed
October 14, 2004
Patent Primary Examiner
Patent abstract
An aliphatic polyester improved provided by using water positively as an initiator or/and a molecular weight-adjusting agent, is improved in moisture resistance. More specifically, a cyclic ester containing proton-source compounds including more than 80 ppm of water as an initiator or/and a molecular weight-adjusting agent, is subjected to ring-opening polymerization, and the resultant aliphatic polyester is compounded with a carboxyl group-capping agent to produce such an aliphatic polyester.
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