Preparation of polyarylenesulfone from bis(chloroaryl) sulfone,

Details Preparation of polyarylenesulfone from bis(chloroaryl) sulfone, Preparation of polyarylenesulfone from bis(chloroaryl) sulfone,

1992-10-13

1993-08-24

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528171, 528391, C08G 7520

Patent

active

052390446

ABSTRACT:
A polyarylsulphone is prepared by the polycondensation of a bisphenol with an aryl dichloride, at least one of which contains a sulphone group, in the presence of a base and introducing into the reaction mixture less than 5% mole, relative to the aryl dichloride, of 4,4'-difluorodiphenylsulphone. The bisphenol and aryldichloride can be of 4,4'-dihydroxydiphenylsulphone and 4,4'-dichlorodiphenylsulphone respectively. The difluoro compound is added when the polymerisation is essentially complete. The polymer product if of improved quality.

REFERENCES:
patent: 3933764 (1976-01-01), McMaster
patent: 4105636 (1978-08-01), Taylor
patent: 4116940 (1978-09-01), Korshak et al.
Chemical Abstracts, vol. 99, 1983, Ref. 88765f.

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