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US 4,382,138 AGranted
Polyamide containing 4,4'-diamino-2,2', 6,6'-tetramethylbiphenyl moieties
AssigneeStandard Oil Company (Indiana)
InventorsEdward E. Paschke, J. A. Donohue
Life of this patent
Estimating the term…
Abstract
Novel copolyamides and polyamides and molding compositions are prepared from 4,4'-diamino-2,2', 6,6'-tetramethylbiphenyl and aliphatic or aromatic diacids, dianhydride and mixtures of diamines. The polyamides and copolyamides are useful as engineering plastics.
Claims64
An injection moldable polyamide comprising the following recurring structure:
- ##STR5## wherein R is a divalent aliphatic or aromatic hydrocarbon radical or a mixture of hydrocarbon radicals and the polyamide has a glass transition temperature in excess of 171.degree. C.
An injection moldable copolyamide comprising the following recurring structure:
- ##STR10## wherein R and R' are the same or different aliphatic hydrocarbon radicals having from 2 to 18 carbon atoms or aromatic hydrocarbon radicals having from 6 to 20 carbon atoms or a mixture of hydrocarbon radicals and the copolyamide has a glass transition temperature in excess of 171.degree. C.
Dependencies are inferred from the claim text.