Preparation of substituted polysulfones through ortho-metalated

Details Preparation of substituted polysulfones through ortho-metalated Preparation of substituted polysulfones through ortho-metalated

1986-10-27

1989-01-10

Anderson, Harold D.

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

Synthetic resins

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

528171, 528174, C08G 6540

Patent

active

047974575

ABSTRACT:
Novel substituted aromatic polysulfones are disclosed which contain repeating units of the formula: ##STR1## wherein each R represents hydrogen or a substituent, such as an aliphatic or aromatic substituent, a heteroatom or heteroatom-containing group or a metal-containing group, at least one of the groups R being other than hydrogen in some repeating units of the polymer chain, R.sub.1 and R.sub.2 each represents alkyl or aryl, each R.sub.s is the same or different and represents hydrogen or one or more noninterfering substituents, and n is zero or one. The substituted polysulfones (I) are useful materials which exhibit improved or modified physical, mechanical and chemical properties, such as glass transition temperature, hydrophilicity, lipophilicity, solubility, processability or resistance to chemicals. Also disclosed are processes for the preparation of the novel compounds (I) involving lithiated intermediates.

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