C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/19 (2006.01) C08G 63/672 (2006.01)
Patent
CA 2045899
Abstract There is disclosed a polyester resin having an end carboxyl group concentration of not higher than 40 milliequivalent/kg (meq/kg) and a high heat stability in melting and forming substantially no thermal decomposition product in melt molding, which is produced mainly from an aromatic dicarboxylic acid or its ester-forming derivative (a) and an aliphatic dihydroxy compound (b) having 2 to 8 carbon atoms by a process wherein an ester-forming compound (c) of the following general formula (I) is copolymerized therewith in such an amount that the introduction rate thereof will be 0.01 to 7 molar % based on the aromatic dicarboxylic acid: HO-R-O-A-O-R-OH (I) wherein A represents a divalent organic radical having at least one aromatic ring, R represents a divalent organic radical selected from among aliphatic hydrocarbon groups and polyoxyalkylene groups each having 2 to a carbon atoms. The resin is suitable to mold.
Hijikata Kenji
Kanaka Keiichi
Polyplastics Co. Ltd.
Smart & Biggar
LandOfFree
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