Tricyclo[6.4.0.0.sup.2,7 ]-dodecane-1,8,2,7-tetracarboxylic acid dianhydride and polyimides therefrom
AssigneeStandard Oil Company (Indiana)
InventorsTayseer S. Nimry, Ellis K. Fields
Life of this patent
Estimating the term…
Abstract
Novel polyimides and molding compositions are prepared from tricyclo[6.4.0.0.sup.2,7 ]dodecane-1,8,2,7-tetracarboxylic acid dianhydride. Also a novel dianhydride-,tricyclo[6.4.0.0.sup.2,7 ]dodecane-1,8,2,7-tetracarboxylic acid dianhydride is prepared by a novel photodimerization of 1-cyclohexene-1,2-dicarboxylic anhydride. The polyimides are useful as engineering plastics.
Claims52
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##
The polyimide consisting essentially of the following recurring structure:
- ##STR9##
A polyimide consisting essentially of the following recurring structure:
- ##STR10##
A copolyimide consisting essentially of the following structure:
- ##STR11## wherein R.sub.1 and R.sub.2 are the same or different divalent aliphatic, cycloaliphatic, araliphatic or aromatic hydrocarbon radicals.
A copolyimide consisting essentially of the following recurring structure:
- ##STR13## wherein R.sub.1 and R.sub.2 are the same or different divalent aliphatic, cycloaliphatic, araliphatic, or aromatic hydrocarbon radicals.
A copolyimide consisting essentially of the following recurring structure:
- ##STR14## wherein R.sub.1 and R.sub.2 are the same or different divalent aliphatic, cycloaliphatic, araliphatic, or aromatic hydrocarbon radicals.
A copolyimide consisting essentially of the following recurring structure:
- ##STR15##
A copolyimide consisting essentially of the following structure:
- ##STR16## wherein X is a divalent hydrocarbon radical and X' is a tetravalent hydrocarbon radical.
A copolyimide consisting essentially of the following recurring structure:
- ##STR17##
A copolyimide consisting essentially of the following recurring structure:
- ##STR18##
A copolyimide consisting essentially of the following recurring structure:
- ##STR19## wherein R.sub.1 and R.sub.2 are different divalent aliphatic, cycloaliphatic, araliphatic or aromatic hydrocarbon radicals.
Dependencies are inferred from the claim text.