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US 4,096,341 AGranted
Thermally stable, rigid dibasic acids
AssigneeE. I. Du Pont de Nemours and Company
InventorAugust Henry Frazer
Life of this patent
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Abstract
Thermally stable, rigid dibasic acids of the formula ##STR1## wherein R.sup.1 is arylene or substituted arylene, are used to prepare thermally stable, rigid polyesters of the formula ##STR2## WHERE R.sup.2 is arylene or substituted arylene, and n is at least 10.
Claims4
Thermally stable, rigid, dibasic acids of the formula ##STR39## where R.sup.1 is an arylene selected from the group consisting of 1,4-phenylenes, 4,4'-biphenylenes and 2,6-naphthylenes, said arylene being unsubstituted or substituted with halo, lower alkyl or phenyl.
Dependencies are inferred from the claim text.