Polyphenylene ether-polyamide compositions from dicarboxylate-ca

Details Polyphenylene ether-polyamide compositions from dicarboxylate-ca Polyphenylene ether-polyamide compositions from dicarboxylate-ca

1990-02-06

1991-11-19

Ziegler, Jacob

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

Synthetic resins

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

525 68, 525397, 525905, C08L 5104, C08L 5302, C08L 7112

Patent

active

050667190

ABSTRACT:
Polyphenylene ethers are capped by reaction in the melt, with application of vacuum, with at least one trimellitic anhydride salicylate, ester, preferably the 4-(phenyl salicylate) ester. The preferred melt processing method is extrusion with vacuum venting. By this method, the polyphenylene ether is capped with reactive dicarboxylate groups and also with salicylate groups, improving its thermal stability. The capped polyphenylene ether is capable of forming copolymers with polyamides, and said copolymers are useful as compatibilizers for polyphenylene ether-polyamide blends.

REFERENCES:
patent: 4600741 (1986-07-01), Aycock et al.
patent: 4642358 (1987-02-01), Aycock et al.
patent: 4808671 (1989-02-01), Sivavec

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