Manufacture of polyethers from bis-(4-hydroxyphenyl)-sulfone and

Details Manufacture of polyethers from bis-(4-hydroxyphenyl)-sulfone and Manufacture of polyethers from bis-(4-hydroxyphenyl)-sulfone and

1978-06-05

1980-04-29

Lee, Lester L.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C08G 6540

Patent

active

042007283

ABSTRACT:
Polyethers, preferably containing sulfone groups, are obtained by a multi-stage condensation process at from 100.degree. to 230.degree. C. from substantially equivalent amounts of bis-(4-hydroxyphenyl)-sulfone and a dichlorobenzene compound in a polar aprotic solvent in the presence of an anhydrous alkali metal carbonate, with or without the addition of a compound which forms an azeotrope.

REFERENCES:
patent: 3951918 (1976-04-01), Jones
patent: 3957665 (1976-05-01), Jones
patent: 3983300 (1976-09-01), Jones
patent: 4008203 (1977-02-01), Jones
patent: 4008204 (1977-02-01), Jones
patent: 4008205 (1977-02-01), Jones
patent: 4105635 (1978-08-01), Freeman
patent: 4105636 (1978-08-01), Taylor

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