Asahi Kasei Chemicals Corporation

Asahi Kasei Kabushiki Kaisha

Yukiyoshi Sasaki

Takashi Iwamoto

Mitsuhiro Horio

Hiroshi Oyamada

Yasukazu Shikano

Teruaki Sakuma

Tetsuo Kurihara

Norio Sakata

Sumio Komatsu

Syuuichi Kudou

(Problem to be Solved) There is provided a reinforced polyamide resin pellet that is excellent in plasticization time stabilization properties during molding and molding appearance stability under molding conditions in long-term continuous molding. (Solution) A reinforced polyamide resin pellet comprising:

Reinforced polyamide resin pellet

A polyamide comprising (a) a unit comprising adipic acid and hexamethylenediamine and (b) a unit comprising isophthalic acid and hexamethylenediamine, wherein a ratio of the isophthalic acid component to the total carboxylic acid component in the polyamide is 0.05&#x2266;(x)&#x2266;0.5 and a range of blocking ratio (Y) is &#x2212;0.3&#x2266;(Y)&#x2266;0.8. Also provided are compositions comprising 30 to 95% by mass of the above polyamide and 5 to 70% by mass of an inorganic filler.

Polyamide and polyamide composition

Provided is a polyacetal resin composition obtained from a raw material composition containing a polyacetal resin, a hydrazine derivative, and a compound for lowering the melting point of the hydrazine derivative, wherein a mixture of the hydrazine derivative and the compound satisfies both of the following conditions: T1&#x3c;T2 and T1&#x3c;T3, in which T1 is an apex temperature of an endothermic peak of the mixture having a maximum endothermic capacity by, with DSC, heating and cooling the mixture in accordance with a predetermined temperature program and then heating it at a predetermined rate until the mixture fuses; and T2 and T3 represent apex temperatures of endothermic peaks of the hydrazine derivative and the polyacetal resin having a maximum endothermic capacity, respectively by the similar treatment.

Polyacetal resin composition and preparation process thereof

A polyacetal resin composition comprising (A) 100 parts by mass of polyacetal resin generating formaldehyde in an amount of not more than 100 ppm when heated at a temperature of 200&#xb0; C. for 50 minutes under the nitrogen atmosphere and (B) 0.01 to 5 parts by mass of a hydrazide compound can provide an article which is remarkably reduced in an emission amount of formaldehyde even though molded either at a higher temperature or under molding conditions wherein the resin temperature rises partially. Therefore, the polyacetal resin composition can be molded according to various molding methods and under a wide range of molding conditions. The article molded from the resin composition has succeeded in reducing the emission amount of formaldehyde, measured according to VDA275 method, to not more than 1 mg/kg, the level never achieved before, and therefore is usable for various applications where a reduced VOC is required.

Polyacetal resin composition and article thereof

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Chiyoda-ku, Japan

Yukiyoshi Sasaki