Polyimides from bicyclo[4.2.0]octane-7,8-dimethyl-3,4,7,8-tetracarboxylic acid dianhydride (I) and bicyclo [4.2.0]octane-2,5 diphenyl-7,8-dimethyl-3,4,7,8-tetracarboxylic dianhydride
AssigneeStandard Oil Company (Indiana)
InventorsTayseer S. Nimry, Ellis K. Fields
Life of this patent
Estimating the term…
Abstract
Novel polyimides, copolyimides and molding compositions are prepared from novel dianhydrides such as bicyclo[4.2.0]octane-2,5 diphenyl-7,8-dimethyl,3,4,7,8-tetracarboxylic dianhydride and bicyclo[4.2.0]octane-7,8-dimethyl-3,4,7,8-tetracarboxylic acid dianhydride. The novel polyimides are useful as engineering plastics. The novel dianhydrides are useful for the preparation of the polyimides.
Claims41
A polyimide consisting essentially of the following recurring structure:
- ##STR8## wherein R is a divalent aliphatic, cycloaliphatic, araliphatic or aromatic hydrocarbon radical and Z is hydrogen or benzene radical.
A polyimide consisting essentially of the following structure:
- ##STR10##
A polyimide consisting essentially of the following recurring structure:
- ##STR11##
A polyimide consisting essentially of the following recurring structure:
- ##STR12##
A polyimide consisting essentially of the following recurring structure:
- ##STR13##
A polyimide consisting essentially of the following recurring structure:
- ##STR14##
A copolyimide consisting essentially of the following recurring structure:
- ##STR15## wherein R.sub.1 and R.sub.2 are different divalent aliphatic, cycloaliphatic, araliphatic or aromatic hydrocarbon radicals.
A copolyimide consisting essentially of the following recurring structure:
- ##STR17## wherein Z is a hydrogen or benzene radical, X is a divalent hydrocarbon radical and X' is a tetravalent hydrocarbon radical.
Dependencies are inferred from the claim text.