Process for terminating polyphenylene ethers reactions with amin

Details Process for terminating polyphenylene ethers reactions with amin Process for terminating polyphenylene ethers reactions with amin

1976-04-16

1977-11-15

Lee, Lester L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 47CZ, 260 47CP, 260 49, C08G 6544

Patent

active

040585042

ABSTRACT:
In the production of polyphenylene ethers by oxidative polycondensation of phenols in the presence of a complex catalyst, an aminocarboxylic acid derivative and a reducing agent are simultaneously added to the reaction mixture when the resulting polyphenylene ether has attained the desired degree of polymerization, thereby to terminate the polymerization and simultaneously purify the reaction mixture. Hence, a stable purified polymer can be obtained.

REFERENCES:
patent: 3573254 (1971-03-01), Factor
patent: 3787358 (1974-01-01), Nishioka et al.
patent: 3817919 (1974-06-01), Nakashio et al.
patent: 3843604 (1974-10-01), Pravednikov et al.
patent: 3951917 (1976-04-01), Floryan et al.

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