Ube Industries, Inc.

Yazaki Corporation

Tatsuo Tsumiyama

Toshiro Shimada

Satoru Nakamoto

Atsuo Kawakami

Hisaya Yamaguchi

Hiroaki Yamaguchi

Tetsuo Kato

Masahiro Kanda

Fumio Aoki

Tomohiko Yamamoto

Akinori Shiotani

Katsutoshi Washio

Tadahisa Kanayama

Teruo Takada

Kouji Sugimoto

Yoshifumi Akagawa

A polyimide/metal composite sheet is composed of a metal film and a polyimide film polyimide which is prepared by reaction of asymmetric biphenyltetracarboxylic acid dianhydride and 1,3-bis(4-aminophenoxy)benzene. The polyimide film is firmly bonded to and hardly peelable from the metal film. The polyimide film can contain a solid filler.

Polyimide/metal composite sheet

A process for production of polyimide molded bodies which comprises a step in which a polyimide resin powder obtained by polymerization and imidation of p-phenylenediamine with 3,3,4,4&prime;-biphenyltetracarboxylic acid, its ester or its dianhydride and 2,3,3&prime;,4&prime;-biphenyltetracarboxylic acid, its ester or its dianhydride is molded at a pressure of approximately 800-5,000 kgf/cm , a step in which the pressurized body is subjected to calcination at about 450-550&deg; C. under low pressure, a step in which the calcined molded body is vacuum encapsulated into a metal capsule, and a step in which the encapsulated molded body is isotropically subjected to hot compression at approximately 460-550&deg; C. in an inert gas atmosphere such as argon. The polyimide molded bodies obtained thereby have a density in the range of 1.44-1.38 g/cm .

Process for production of metal encased polyimide molded bodies and metal encased polyimide molded bodies

A process for production of polyimide molded bodies which comprises a step in which a polyimide resin powder obtained by polymerization and imidation of p-phenylenediamine with 3,3&prime;,4,4&prime;-biphenyltetracarboxylic acid, its ester or its dianhydride and -biphenyltetracarboxylic acid, its ester or its dianhydride is molded at a pressure of approximately 3,000-5,000 kgf/cm , and a step in which it is calcined at about 460-550&deg; C. under low pressure. The polyimide molded bodies obtained thereby have a density in the range of 1.28-1.34 g/cm .

Process for production of polyimide molded bodies and polyimide molded bodies

Fluorinated polymides comprising units of 2,2',5,5',6,6'-hexafluorobiphenyl-3,3',4,4'-tetracarboxylic dianhydride and aromatic diamines.

Fluorinated polyimides, laminated substrates and polyamic acid solutions

A crystalline terpolymer polyamide produced from: (a) an equimolar salt of hexamethylenediamine with adipic acid, (b) an equimolar salt of hexamethylenediamine with terephthalic acid, and (c) 12-aminododecanoic acid or .omega.-laurolactam; a polyamide resin composition comprising (A) the terpolymer polyamide and (B) a modified polyolefin; a polyamide resin composition comprising (A) the terpolymer polyamide, (B) the modified polyolefin, and (C) polyamide 12; a polyamide resin composition comprising (A) the terpolymer polyamide and (D) an inorganic filler and/or a flame retardant; and an automotive part comprising a molding one of these terpolymer polyamide and polyamide resin compositions.

Terpolymer polyamide, polyamide resin composition containing the same,

A polyamide resin composition comprising: (A) from 50 to 92 parts by weight of a crystalline terpolymer polyamide produced from: (a) an equimolar salt of hexamethylenediamine with adipic acid, (b) an equimolar salt of hexamethylenediamine with terephthalic acid, and (c) 12-aminododecanoic acid or .omega.-laurolactam; (B) from 5 to 35 parts by weight of a modified polyolefin grafted with an .alpha.,.beta.-unsaturated carboxylic acid or an anhydride or derivative thereof; and (C) from 3 to 15 parts by weight of polyamide 12, with the total amount of the composition being 100 parts by weight.

Polyamide resin composition

A continuous polymerization method for laurolactam which has three stages. A prepolymerization process include steps of preliminarily heating laurolactam with 1 to 10% weight of water added, thereafter continuously feeding and passing the laurolactam from the upper part of the lower part of the longitudinal-type polymerization reaction zone, arranging a temperature decreasing gradient of 10.degree. C. or more than the upper part to the lower part directions at a polymerization temperature of 250.degree. and 300.degree. C. in the polymerization zone, and polymerizing the laurolactam under vapor pressure up to a conversion rate of 99.5% or more. A intermediate process has a step of releasing pressure from the prepolymerization product from the prepolymerization process for conversion into an intermediate product at atmospheric pressure. A post polymerization process includes the steps of continuously feeding the intermediate product at atmospheric pressure from the intermediate process in the direction from one end of the lower end to the other lower end of the traverse-type polymerization zone, polymerizing the intermediate product with agitation and air discharge in the presence of inert gas under reduced pressure or atmospheric pressure to a final relative viscosity of .eta..sub..tau. of 1.9 to 3.3.

Continous polymerization method of laurolactam and apparatus therefor

A connector comprising a housing comprising a resin composition comprising:

Connector

A continuous polymerization method for laurolactam which has three stages. A prepolymerization process include steps of preliminarily heating laurolactam with 1 to 10% weight of water added, thereafter continuously feeding and passing the laurolactam from the upper part of the lower part of the longitudinal-type polymerization reaction zone, arranging a temperature decreasing gradient of 10.degree. C. or more than the upper part to the lower part directions at a polymerization temperature of 250.degree. and 300.degree. C. in the polymerization zone, and polymerizing the laurolactam under vapor pressure up to a conversion rate of 99.5% or more. A intermediate process has a step of releasing pressure from the prepolymerization product from the prepolymerization process for conversion into an intermediate product at atmospheric pressure. A post polymerization process includes the steps of continuously feeding the intermediate product at atmospheric pressure from the intermediate process in the direction from one end of the lower end to the other lower end of the traverse-type polymerization zone, polymerizing the intermediate product with agitation and air discharge in the presence of inert gas under reduced pressure or atmospheric pressure to a final relative viscosity of .eta..sub..zeta. of 1.9 to 3.3.

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Ube, Japan

Tatsuo Tsumiyama