Spiro(bis)indane polyethersulfones and method for their preparat

Details Spiro(bis)indane polyethersulfones and method for their preparat Spiro(bis)indane polyethersulfones and method for their preparat

1989-05-19

1990-09-25

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528185, 528190, 528195, 528298, C08G 6942, C08G 6300, C08G 6302

Patent

active

049594540

ABSTRACT:
Linear polyethersulfones are prepared by ring-opening of a macrocyclic spirobiindane polyethersulfone oligomer composition. The ring-opening reaction is conducted in the presence of a basic reagent such as an alkali metal bisphenol salt, at a temperature in the range of about 300.degree.-400.degree. C.

REFERENCES:
patent: 4789725 (1988-12-01), Guggenheim et al.
patent: 4808754 (1989-02-01), Guggenheim et al.
patent: 4814496 (1989-03-01), Guggenheim et al.

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