C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/250, 402/368
C07D 405/10 (2006.01) C07D 409/10 (2006.01) C08F 224/00 (2006.01) C08G 73/06 (2006.01) C08G 73/12 (2006.01)
Patent
CA 1298834
ABSTRACT Heterocyclic compounds having the formula Image (I) where R is hydrogen, methyl or ethyl R1 independently in each occurrence is hydrogen, alkyl group of 1-4 carbons, and -C(R):CH-Q n is a number having an average value 34,638-F from 0 to 5 Q has the formula Image Z is =O, -S, or =N-R2 R is selected from hydrogen, alkyl, aryl,alkaryl, and aralkyl Image is a monocyclic or bicyclic heterocyclic ring selected from the group consisting of pyridine, pyrazine, pyridazine, pyrimidine, quinoline, isoquinoline, quinoxaline, quinazoline and phthalazine x is 1 to 3 with the proviso that when n is zero, the heterocyclic ring has at least two -C(R):CH-Q groups are prepared by condensing nitrogen heterocyclic com- pounds such as trimethyl pyridine with dialdehydes and heterocyclic aldehydes such as furfural. These can be further reacted and chain extended with bismaleimides 34,638-F or polymaleimides. The compounds and their reaction products are useful to make heat resistant composites with various fibers such as graphite fibers. 34,638-F
532722
Puckett Paul M.
Smart & Biggar
The Dow Chemical Company
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