Novel nonaromatic dianhydride and polyimides from tricyclo [4.2.1.0.sup.2,5 ] nonane-3,4 dimethyl-3,4,7,8-tetracarboxylic acid dianhydride
AssigneeStandard Oil Company (Indiana)
InventorsTayseer S. Nimry, Ellis K. Fields
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Abstract
Novel polyimides and molding compositions are prepared from novel tricyclo[4.2.1.0.sup.2,5 ] nonane-3,4 dimethyl-3,4,7,8-tetracarboxylic acid dianhydride. The dianhydride is useful for the manufacture of polyimides which are useful as engineering plastics.
Claims26
A polyimide consisting essentially of the following recurring structure:
- ##STR6## wherein R is a divalent aliphatic, cycloaliphatic, araliphatic or aromatic hydrocarbon radical.
A polyimide consisting essentially of the following recurring structure:
- ##STR8##
A polyimide consisting essentially of the following recurring structure:
- ##STR9##
A copolyimide consisting essentially of the following recurring structure ##STR10## 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:
- ##STR12## wherein X is a divalent hydrocarbon radical and X' is a tetravalent hydrocarbon radical.
Dependencies are inferred from the claim text.