Polyimides and co-polyimides based on dioxydiphthalic anhydride

Details Polyimides and co-polyimides based on dioxydiphthalic anhydride Polyimides and co-polyimides based on dioxydiphthalic anhydride

1989-05-15

1991-03-26

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528125, 528126, 528128, 528173, 528182, 528208, 528220, 528224, 528229, 5283291, 528351, 528353, 549241, C08G 6300, C08G 6926, C08G 7500, C07D30789

Patent

active

050030310

ABSTRACT:
Novel polyimides and co-polyimides are prepared by the condensation polymerization of an aryl diamine with dioxydiphthalic anhydride or a mixture thereof with oxydiphthalic anhydride. The polyimides and co-polyimides prepared exhibit a low moisture absorption and improved dielectric properties and can be tailored to provide a composition having desirable mechanical properties, specifically, rigidity.

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patent: 4868316 (1989-09-01), Schwartz, Jr.
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patent: 4943642 (1990-07-01), Stults et al.
patent: 4946985 (1990-08-01), Stults
patent: 4948904 (1990-08-01), Stults

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