Anhydride capping polyphenylene ether with carboxylic acid

Details Anhydride capping polyphenylene ether with carboxylic acid Anhydride capping polyphenylene ether with carboxylic acid

1988-03-21

1989-02-21

Anderson, Harold D.

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

Synthetic resins

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

528212, 528214, 528215, 528216, C08G 6548

Patent

active

048066028

ABSTRACT:
Polyphenylene ethers are capped by reaction at a temperature in the range of about 175.degree.-350.degree. C. with at least one carboxylic acid anhydride in the presence of a catalytic amount of at least one highly basic and/or nucleophilic amine. The capping reaction advantageously takes place in the melt. Blends of polyphenylene ethers with polystyrenes may also be capped.

REFERENCES:
patent: 3375228 (1968-03-01), Holoch et al.
patent: 4048143 (1977-09-01), Hay et al.
patent: 4391950 (1983-07-01), Cooper
patent: 4654405 (1987-03-01), Jalbert

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