Tetracarboxylic acid dianhydrides

Details Tetracarboxylic acid dianhydrides Tetracarboxylic acid dianhydrides

1991-08-23

1992-06-16

Shen, Cecilia

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549 60, C07D40900, C07D30702

Patent

active

051226170

ABSTRACT:
Tetracarboxylic acid anhydrides represented by the following formulae [IA] and [IB] are provided: ##STR1## where n is an integer of 1 to 3. The tetracarboxylic acid anhydrides give polyimides having low thermal expansion, low dielectric constant and low hygroscopicity.

REFERENCES:
patent: 3891633 (1975-06-01), Berlin et al.
patent: 4490545 (1984-12-01), Winzenburg et al.
patent: 4571425 (1986-02-01), Silva
patent: 5003085 (1991-03-01), Behrend et al.

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