Process for the preparation of aromatic polyethersulphones

Details Process for the preparation of aromatic polyethersulphones Process for the preparation of aromatic polyethersulphones

1989-06-13

1991-09-10

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528125, 528126, 528127, 528128, C08G 802, C08G 826, C08G 7523

Patent

active

050474960

ABSTRACT:
This invention relates to a process for the preparation of high molecular weight aromatic polyethersulphones from diphenols and dihalogenoaryls, characterized in that N-alkylated acid amides are used as solvents and at the same time for the azeotropic removal of the water of reaction.

REFERENCES:
patent: 4056511 (1977-11-01), Staniland
patent: 4731429 (1988-03-01), McMaster et al.

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