Preparation of aromatic block copolyethers

Details Preparation of aromatic block copolyethers Preparation of aromatic block copolyethers

1987-01-12

1988-06-14

Marquis, Melvyn I.

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

Synthetic resins

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

525471, C08L 7700

Patent

active

047512741

ABSTRACT:
In the preparation of block copolyethers which contain sulfonyl and keto groups by polycondensation of aromatic dihalogen compounds and bisphenols in the presence of an alkali metal carbonate in N-methylpyrrolidin-2-one as a solvent, an amorphous polyether sulfone block having a molecular weight Mn of from 1,500 to 30,000 is prepared in a first stage, and, in a second stage, a polyetherketone block is polymerized onto the living chain ends, the molar ratio of sulfonyl to keto groups being from 90:10 to 40:60.

REFERENCES:
patent: 4176222 (1979-11-01), Cinderey et al.
patent: 4446294 (1984-05-01), Rose et al.

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