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US 4,537,974 AGranted
Diethynylated phenylbenzimidazole compounds
AssigneeHughes Aircraft Company
InventorKreisler S. Y. Lau
Life of this patent
Estimating the term…
Abstract
A diethynylated phenylbenzimidazole compound having the formula: ##STR1## where Y is phenyl, cyclohexyl, adamantyl or phenoxylatedphenyl of the formula C.sub.6 H.sub.5 (OC.sub.6 H.sub.4)n (n=1 to 3) and where R1, R2 and R3 are ethynyl, phenoxyethynyl, phenylethynyl, or hydrogen, and further wherein at least one of said R1, R2 or R3 is not hydrogen. The compounds can be cured to form thermoset polymers which are stable at temperatures above 300.degree. C.
Claims17
A diethynylated bisbenzimidazole monomer having the formula:
- ##STR7## where Y is phenyl, cyclohexyl, adamantyl or phenoxylatedphenyl of the formula C.sub.6 H.sub.5 (OC.sub.6 H.sub.4)n (N=1 to 3) and where R1, R2 and R3 are ethynyl, phenoxyethynyl, phenylethynyl or hydrogen, and further wherein at least one of said R1, R2 or R3 is not hydrogen.
Dependencies are inferred from the claim text.