Polyimides prepared from cyclic dianhydrides
AssigneeStandard Oil Company (Indiana)
InventorsMark L. Winzenburg, Ellis K. Fields, Benjamin L. Shneider
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Abstract
Cyclic dianhydrides and polyimides are prepared from maleic anhydride compounds and diolefins. The diolefins are alpha- , omega-linear diolefins of up to 100 carbon atoms or cyclic diolefins of up to 40 carbon atoms. The polyimides and copolyimides prepared from these cyclic dianhydrides are useful in films, fibers and coatings.
Claims20
As a composition of matter, a polyimide of the structure selected from the group consisting of ##STR23## wherein R is selected from the group consisting of alkyl groups of 1 to 10 carbon atoms and alkylene groups of from 2 to 20 carbon atoms linked together to form a ring, R.sup.1 and R.sup.2 are individually selected from the group consisting of alkylene groups of 1 to 10 carbon atoms and aralkylene groups of from 8 to 20 carbon atoms, R.sup.3 is selected from the group consisting of alkylene groups of from 2 to 10 carbon atoms, arylene and aralkylene groups of 8 to 20 carbon atoms with a provision that hydrocarbon moieties of said groups of R, R.sup.1, R.sup.2 and R.sup.3 can contain stable linkages consisting of ##STR24## radicals, and n is a whole number from 1 to 1000.
Dependencies are inferred from the claim text.