Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
May 15, 2007
Patent Application Number
10250859
Date Filed
April 16, 2001
Patent Primary Examiner
Patent abstract
An oxytetramethylene glycol copolymer obtained by copolymerizing tetrahydrofuran and neopentyl glycol which has a specific number average molecular weight Mn, a specific molecular weight distribution Mw/Mn, a specific neopentyl glycol copolymerization whole ratio Nw and a specific neopentyl glycol copolymerization partial ratio Nh; a method for producing the same; and a method for purifying an oxytetramethylene glycol copolymer using fresh tetrahydrofuran.
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