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US 4,358,579 AGranted
Polyimides from tetramethylcyclobutane-1,2,3,4,-tetracarboxylic dianhydride and diamines
AssigneeStandard Oil Company (Indiana)
InventorsTayseer S. Nimry, Ellis K. Fields
Life of this patent
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Abstract
Novel polyimides and molding compositions are prepared from tetramethylcyclobutane-1,2,3,4-tetracarboxylic dianhydride and diamines. Also glass and graphite filled polyimides are prepared. The polyimides are useful as engineering plastics.
Claims20
A polyimide consisting essentially of the following recurring structure:
- ##STR3## wherein R is a divalent aliphatic, cycloaliphatic, araliphatic or aromatic hydrocarbon radical.
A polyimide consisting essentially of the following recurring structure:
- ##STR5##
A polyimide consisting essentially of the following recurring structure:
- ##STR6##
A polyimide consisting essentially of the following recurring structure:
- ##STR7##
Dependencies are inferred from the claim text.