Preparation of substituted polysulfones by metalation

Details Preparation of substituted polysulfones by metalation Preparation of substituted polysulfones by metalation

1988-09-20

1989-05-23

Nielsen, Earl

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525535, C08G 7523

Patent

active

048332194

ABSTRACT:
A process is provided for producing aromatic polysulfones which contain repeating units of the formula: ##STR1## wherein each R is ortho to the sulfone, at least one R per polymer chain is an aliphatic or aromatic substituent, a heteroatom or heteroatom-containing group or a metal or metal-containing group, with any remainder thereof being hydrogen, R.sub.1 and R.sub.2 each represents alkyl or aryl, each R.sub.s is hydrogen, and n is zero or one. The process comprises:

REFERENCES:
patent: 3402144 (1968-09-01), Hay
patent: 3639337 (1972-02-01), Klebe

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