Heterocyclic styryl compounds and resins prepared therefrom
AssigneeThe Dow Chemical Company
InventorPaul M. Puckett
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Abstract
Heterocyclic styryl compounds are prepared by condensing nitrogen heterocyclic compounds such as trimethyl pyridine with dialdehydes and heterocyclic aldehydes such as furfural. These can be further reacted and chain extended with bismaleimides or polymaleimides. The compounds and their reaction products are useful to make heat resistant composites with various fibers such as graphite fibers.
Claims4
Compounds having the formula ##STR13## where R is hydrogen, methyl or ethyl,
- R.sub.1 and R.sub.2 are independently hydrogen, alkyl groups of 1-4 carbons, and --C(R).dbd.CH--Q,
- n is a number having an average value from 0 to 5,
- Q has the formula ##STR14## with the proviso that when n has an average value of zero, the pyridine ring has at least two --C(R).dbd.CH--Q groups.
Compounds having the formula ##STR15## where R.sub.1 and R.sub.2 are independently hydrogen, alkyl groups of 1-4 carbons, and --C(R).dbd.CH--Q,
- n is a number having an average value from 0 to 5,
- Q has the formula ##STR16## with the proviso that when n has an average value of zero, the pyridine ring has at least two --C(R).dbd.CH--Q groups.
Dependencies are inferred from the claim text.