Process for producing a modified polyphenylene ether

Details Process for producing a modified polyphenylene ether Process for producing a modified polyphenylene ether

1994-02-24

1995-08-22

Yoon, Tae H.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525392, 525534, C08F28308

Patent

active

054441269

ABSTRACT:
There are disclosed a thermoplastic resin composition comprising (A) a styrenic polymer having a high degree of syndiotactic configuration, (B) an inorganic filler and (C) a polyphenylene ether that is modified with a compound having an ethylenic double bond and a polar group in the same molecule, especially maleic anhydride, the ether having a modification rate of 1.3% or more by weight; a thermoplastic resin composition further comprising (D) a rubbery elastomer in addition to the above components (A), (B) and (C); a process for producing modified polyphenylene ether (PPO) comprising reacting 100 parts by weight of PPO with 1 to 20 parts by weight of the above compound or a derivative thereof in an aromatic hydrocarbon solvent in the presence of 15 or less parts by weight of a radical generator; and a process for producing the modified PPO comprising reacting 100 parts by weight of PPO with 1 to 5 parts by weight of the above compound or a derivative thereof at 300.degree. to 350.degree. C. in the presence of 0.1 to 3 parts by weight of a radical generator which exhibits a half-life period of 1 minute at 300.degree. C. or higher. The above thermoplastic resin composition is markedly improved in its dynamical properties especially rigidity and heat resistance.

REFERENCES:
patent: 5189103 (1993-02-01), Abe et al.

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