Mitsubishi Chemical Corporation

Kazuya Nakamichi

Masahiro Nukui

Yoshihiro Fujimori

Yutaka Yatsugi

Kiyotoshi Fujioka

Noboru Satou

Toshio Kambe

Hirotsugu Niwa

A polyester resin produced by polycondensing a dicarboxylic acid component containing an aromatic dicarboxylic acid or its ester-forming derivative as the main component and a diol component containing ethylene glycol as the main component in the presence of at least an antimony compound and a phosphorus compound, via an esterification reaction or an ester exchange reaction, which is characterized in that the amount of antimony eluted when immersed in hot water of 95&#xb0; C. for 60 minutes in the form of particles having a number average particle weight of 24 mg, is not more than 1 &#x3bc;g per 1 g of the polyester resin, as antimony atoms (Sb).

Polyester resin, molded product made thereof and process for production of polyester resin

A polyester resin produced by polycondensing a dicarboxylic acid component containing an aromatic dicarboxylic acid or its ester-forming derivative as the main component and a diol component containing ethylene glycol as the main component in the presence of at least an antimony compound and a phosphorus compound, via an esterification reaction or an ester exchange reaction, which is characterized in that the amount of antimony eluted when immersed in hot water of 95&deg; C. for 60 minutes in the form of particles having a number average particle weight of 24 mg, is not more than 1 &mgr;g per 1 g of the polyester resin, as antimony atoms (Sb).

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Mie, Japan

Kazuya Nakamichi