Preparation of polyether polymers using bisphenol hydrate as int

Details Preparation of polyether polymers using bisphenol hydrate as int Preparation of polyether polymers using bisphenol hydrate as int

1996-07-05

1997-09-02

Mullis, Jeffrey C.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528170, C08G 7310, C08G 802

Patent

active

056632754

ABSTRACT:
Aromatic polyether polymers, illustrated by polyethersulfones, polyetherketones and polyetherimides, are prepared by a phase transfer catalyzed reaction between a hydrate of 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. Isolation of the hydrate and its conversion to the anhydrous salt prior to the polymerization reaction affords a polymer of higher molecular weight than other methods of preparing the anhydrous salt.

REFERENCES:
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patent: 4492806 (1985-01-01), Mendiratta et al.
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patent: 4950729 (1990-08-01), Daniels
patent: 5229482 (1993-07-01), Brunelle
patent: 5235020 (1993-08-01), Savariar
patent: 5239043 (1993-08-01), Savariar

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