Chisso Corporation

Nobuchika Tabata

Shinichi Akitaya

Yutaka Nozokido

Tooru Fukazawa

Hisao Iizuka

Fumikazu Saito

Toru Fukazawa

Shohji Fukumitsu

A process for producing a polyolefin thermoplastic elastomer composition having superior rubbery elasticity, mechanical properties, etc. and also having improved processing fluidity, workability, etc. is provided, which process comprises blending

Process for producing polyolefin thermoplastic elastomer composition

The present flame retardant compositions of polypropylene resin contains polypropylene as a principal constituent and the following constituents making a total of 100 wt %: (A) silane coupling agent and/or (D) olefinic synthetic rubber, (B) ammonium polyphosphate or melamine-modified ammonium polyphosphate, and (C) one or more nitrogen organic compounds which are producible nonflammable gas products and carbonaceous residues by the pyrolysis of the mixture. Further, the other compositions of polypropylene resin contains (E) polyethylene resin along with the above constituents making a total of 100 wt %. Moreover, the other compositions contains (E) polyethylene resin, and (F) crosslinking agent and (G) thiophosphite along with above constituents making a total of 100 wt. %.

Flame retardant polypropylene resin composition

The present invention disclosed herein is connected with a polypropylene resin composition giving off no corrosive and poisonous gases, having excellent moldability, providing molded articles with excellent mechanical strength and high flame retardance. The composition of the present invention is composed of predetermined amounts of a polypropylene resin, a polyethylene resin, polyammonium phosphate or polyammonium phosphate modified by melamine resin and a 1,3,5-triazine derivative. This composition may additionally contain a predetermined amount of one or more of specific thiophosphites and may further contain a predetermined amount of an olefinic synthetic rubber or elastomer and a crosslinking agent.

Flame-retardant polypropylene resin composition

A flame retardant polyolefin resin composition which, when molded, affords a molded product having highly flame retardant properties, no dripping properties, a smooth surface and an excellent appearance and superior resistances to heavy metal deterioration, heat deterioration and weather is provided, which composition consists of (A) 5-60% by weight of a halogen-containing flame retardant, (B) 100-10% by weight of antimony trioxide based on the weight of the halogen-containing flame retardant, (C) 0.5-15% by weight of a crosslinking agent, (D) 0.05-5% by weight of a specified thiophosphite, and (E) the balance % by weight of a polyolefin resin, the total of the quantities of (A), (B), (C), (D) and (E) being 100% by weight. If necessary, a processing aid may be further added to the above flame retardant polyolefin resin composition.

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Ichihara, Japan

Nobuchika Tabata