Mitsubishi Chemical Industries Limited

Masahiro Hayashi

Seiichi Nozawa

Seiichi Mukai

Hideki Yamanouchi

Takeshi Yamawaki

Tamotsu Yoshimura

Masaharu Shikama

Hideto Kusumoto

Takashi Oikawa

Kazuo Endo

An aromatic polyester comprising two structural units represented by the following formulas A and B in a molar ratio of the structural unit A to the structural unit B being from 70:30 to 90:10 or four structural units represented by the following formulas A, B, C and D in a molar ratio of the total of the structural units A and C to the total of the structural units B and D being from 10:90 to 95:5 and the total of the structural units C and D being less than 50 molar %, and having a reduced viscosity .eta.sp/C of from 0.6 to 4 dl/g as measured at 30.degree. C. at a concentration of 1.0 g/dl in a solution of a mixture comprising phenol and tetrachloroethane in a weight ratio of 1:1, ##STR1##

Aromatic polyester containing phenolphthalein unit and bis-phenol unit

A thermoplastic resin composition is quickly crystallizable and comprises 0.1 to 10 wt. parts of an alkali metal salt of higher fatty acid having carbon atoms of at least 26 obtained by an addition of a fatty acid to .alpha.-olefin having carbon atoms of at least 23 per 100 wt. parts of a thermoplastic polyester.

Thermoplastic polyester resin composition which is quickly crystallizable

A graft copolymer is provided which is characterized by excellent gas impermeability, transparency and impact strength, as well as good flowability, and hence good molding workability, by copolymerizing an olefinically unsaturated nitrile with an alkyl vinyl ether in the presence of a rubbery polymer, which contains at least 50% by weight of a conjugated diene; said olefinically unsaturated nitrile being present in an amount of from 60 to 95% by weight, based on the total weight of said olefinically unsaturated nitrile and said alkyl vinyl ether; and wherein said olefinically unsaturated nitrile and said alkyl ether are present in an amount of from 3 to 50 times by weight the quantity of said rubbery polymer.

Process for preparing a graft copolymer

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Machida, Japan

Masahiro Hayashi