Process for the purification of polyphenylene ethers

Details Process for the purification of polyphenylene ethers Process for the purification of polyphenylene ethers

1985-01-07

1986-03-18

Lee, Lester L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528212, 528214, 528215, 528216, 528217, 528218, C08G 6546

Patent

active

045770107

ABSTRACT:
Polyphenylene ethers, prepared by oxidative polycondensation of alkylphenols, in the presence of copper-amine catalysts, are decolorized from the reaction by-products and purified from the residues of catalytic copper by treatment, in an acid medium, with one or more thiolic compounds comprised in the general formula.

REFERENCES:
patent: 3994859 (1976-11-01), Floryan et al.
patent: 4060514 (1977-11-01), White
patent: 4110311 (1978-08-01), Cooper et al.
patent: 4237265 (1980-12-01), Eliassen
patent: 4463164 (1984-07-01), Dalton et al.

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