Phase transfer catalyzed preparation of aromatic polyether polym

Details Phase transfer catalyzed preparation of aromatic polyether polym Phase transfer catalyzed preparation of aromatic polyether polym

1991-02-28

1993-07-20

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528 21, 528126, 528128, 528170, 528171, 528172, 528173, 528174, 528175, 528179, 528182, 528185, 528214, 528216, 528219, 528220, 546256, 546304, C08G 802, C08G 1400, C08G 7500, C08G 6500

Patent

active

052294820

ABSTRACT:
Aromatic polyether polymers, illustrated by polyethersulfones, polyetherketones and polyetherimides, are prepared by a phase transfer catalyzed reaction between a salt of a dihydroxyaromatic compound and a substituted aromatic compound such as bis(4-hydroxyphenyl) sulfone, bis(4-hydroxyphenyl) ketone or 1,3-bis[N-(4-chlorophthalimido)]benzene or the corresponding derivative of toluene or diphenyl ether, or the analagous fluoro-, bromo- or nitro-substituted compounds. The phase transfer catalysts employed are those which are stable at temperatures in the range of about 125.degree.-250.degree. C. Particularly preferred phase transfer catalysts are the hexaalkylguanidinium and .alpha.,.omega.-bis(pentaalkylguanidinium)alkane salts and the corresponding heterocyclic salts.

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CA 105(18): 153738H; "Polyarylene Polyethers".
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