Catalytic method of preparing carboxy derivatives of polyphenyle

Details Catalytic method of preparing carboxy derivatives of polyphenyle Catalytic method of preparing carboxy derivatives of polyphenyle

1988-04-21

1989-02-28

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, C08G 6548

Patent

active

048086711

ABSTRACT:
Carboxylated polyphenylene ethers are prepared by reaction of the polyphenylene ether with an ester such as a 4-alkyl or 4-aryl ester of trimellitic anhydride. The methyl, ethyl and o-carbophenoxyphenyl esters are preferred; the latter caps the polyphenylene ether in addition to carboxylating it. The reaction takes place in the presence of a triaryl phosphite, at a temperature in the range of about 225.degree.-350.degree. C.

REFERENCES:
patent: 4642358 (1987-02-01), Aycock et al.
patent: 4654405 (1987-03-01), Jalbert et al.
patent: 4760118 (1988-07-01), White et al.

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