Mitsubishi Chemical Corporation

Toshio Kambe

Masahiro Nukui

Yoshihiro Fujimori

Yutaka Yatsugi

Motohiro Munakata

Kiyotoshi Fujioka

Noboru Satou

Kazuya Nakamichi

Takeshi Ogawa

Hirotsugu Niwa

A method for producing a polyester resin composition C), which comprises melt-kneading a polyester resin (A) which satisfies the following formulae (1), (2) and (3) and a polyester resin (B) which satisfies the following formula (4):P1&#x2267;10&#x2003;&#x2003;(1)0.1&#x2266;Ge1&#x2266;1.5&#x2003;&#x2003;(2)0.001&#x2266;Ge1/P1&#x2266;0.15&#x2003;&#x2003;(3)0&#x2266;P2/Ti1&#x2266;80&#x2003;&#x2003;(4)provided that in the formulae (1), (2) and (3), P1 is the content (mol) of phosphorus atoms and Ge1 is the content (mol) of germanium atoms, per ton of the polyester resin (A), and in the formula (4), P2 is the content (mol) of phosphorus atoms and Ti1 is the content (mol) of titanium atoms, per ton of the polyester resin (B). A polyester resin composition (C) obtained by the method, and a molded product such as a film made from such a composition are also provided.

Polyester resin composition, process for producing the same and molding thereof

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

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Yokkaichi, Japan

Toshio Kambe