Preparation of polysulfones

Details Preparation of polysulfones Preparation of polysulfones

1989-11-01

1991-04-16

Anderson, Harold D.

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

Synthetic resins

From sulfur-containing reactant

528388, C08G 7514, C08G 7518, C08G 7520

Patent

active

050083694

ABSTRACT:
In a preferred embodiment, poly(4-phenylsulfone) is prepared by self-condensation of sodium 4-fluorophenyl sulfinate. The process is initiated by a small quantity of 4,4'-difluorophenylsulfone. The process is conducted in the presence of a dipolar, aprotic solvent such as dimethylsulfoxide. The reaction is conducted at a mildly elevated temperature, preferably within the range of from about 100.degree. C. to about 200.degree. C.

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