Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Toshiaki Matsuo0
Naruyasu Okamoto0
Ryuuji Kajiya0
Takayuki Matsumoto0
Mamoru Mizumoto0
Date of Patent
August 17, 2010
0Patent Application Number
118262250
Date Filed
July 13, 2007
0Patent Primary Examiner
Patent abstract
A polymerization method comprises, prior to polymerization of a monomer of the cyclic dimer of alpha-hydroxycarboxylic acid, a first mixture of a polymerization catalyst by bypassing a part of the monomer of the cyclic dimer is prepared. Then, the first mixture is mixed with a dominant amount of the monomer introduced into a polymerization reactor. The monomer of the cyclic dimer in the polymerization reactor is conducted in the presence of a polymerization initiator.
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