Nippondenso Co., Ltd.

Tonen Sekiyukagaku Kabushiki Kaisha

Koji Egashira

Takashi Mikami

Hiroyuki Wakabayashi

Kiyotada Narukawa

Fumio Kato

Kissho Kitano

Kunio Iwanami

Masato Sakuma

Masami Esaki

Kenichi Aoki

Yukihiko Yagi

A fiber-reinforced polymer composition containing resin components including (a) 30-90 weight % of a polyamide resin, and (b) 10-70 weight % of polyolefin+unsaturated carboxylic acid-modified polyolefin, based on the resin components; and, per 100 parts by weight of the total components, (c) 5-50 parts by weight of glass fibers, and (d) additives including the following set of additives: 0.1-1 parts by weight of N,N'-hexamethylene-bis (3,5-di-tert-butyl-4-hydroxy-hydrocinnamide); 0.1-1 parts by weight of triethylene glycol-bis [3-(3-tert-butyl-5-methyl-4-hydroxyphenyl) propionate]; and 0.1-1 parts by weight of pentaerythrityl-tetrakis [3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate]. An alternative set of additives are 0.1-2 parts by weight of N,N'-bis [3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionyl] hydrazine; 0.05-0.5 parts by weight of pentaerythrityl-tetrakis [3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate]; 0.05-0.5 parts by weight of distearyl-pentaerythritol diphosphite; and 0.15-1 parts by weight of distearyl-3,3'-thiodipropionate.

Fiber-reinforced polymer composition

Fiber-reinforced polymer compositions containing resin components including (a) 30-90 weight % of polyamide resins, and (b) 10-70 weight % of polyolefins+unsaturated carboxylic acid-modified polyolefins, based on the resin components; and (c) 5-50 parts by weight of glass fibers per 100 parts by weight of the total compositions, a molar ratio of end amino groups in the polyamide resins to carboxyl groups in the modified polyolefins being 10-1000. The compositions have a morphology in which polyolefin domains having an average size of 0.5-5 .mu.m are uniformly dispersed in polyamide matrix phases. They are produced by a double-screw extruder having a length/inner diameter (L/D) ratio of 25 or more and having a first hopper for introducing the resin components, a second hopper for introducing the glass fibers, a vent and a die exit in this order, and further having at least one first kneading zone for strongly kneading the resin components, and at least one second kneading zone disposed between the second hopper and the vent for strongly kneading the resin components and the glass fibers.

Method of and apparatus for making fiber-reinforced polymer compositions

Fiber-reinforced polymer composition and method of producing same

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Oobu, Japan

Koji Egashira