Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1992-12-10
1994-07-05
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524577, 525133, 5253333, 525391, 525397, 525534, 525905, 525392, C08L 7102, C08F28308
Patent
active
053268130
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: 4654405 (1987-03-01), Jalbert et al.
patent: 4746708 (1988-05-01), Sybert
patent: 5189103 (1993-02-01), Abe et al.
patent: 5219951 (1993-06-01), Nelissen et al.
Masuyama Akitoshi
Okada Akihiko
Idemitsu Kosan Co. Ltd.
Michl Paul R.
Yoon Tae H.
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