Polyphenylene ether compositions

Details Polyphenylene ether compositions Polyphenylene ether compositions

1977-06-23

1978-12-05

Seccuro, Carman J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260897R, C08L 5104

Patent

active

041286049

ABSTRACT:
There are provided high impact strength thermoplastic compositions comprising a polyphenylene ether and a rubber modified polystyrene resin. The compositions include a dispersed phase of rubber particles having a maximum mean diameter of 2 microns and preferably from about 0.5 to 2 microns; the composition contains greater than 22% by weight of a rubber gel phase on a polyphenylene ether-free basis; and the rubber comprises a polybutadiene having a cis-1,4 content of at least 50% by weight and a vinyl content of no more than 10% by weight. The compositions provide molded articles with substantial and unexpected improvements in impact resistance, surface appearance and resistance to aggressive solvent systems and the retention of impact strength at sub-zero temperatures is particularly outstanding.

REFERENCES:
patent: 3383435 (1968-05-01), Cizek
patent: 3487127 (1969-12-01), Erchak et al.
patent: 3511895 (1970-05-01), Kydonieus

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