Allyl styryl pyridines and pyrazines and polymers thereof
AssigneeThe Dow Chemical Company
InventorRobert E. Hefner, Jr.
Life of this patent
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Abstract
Allyl ether capped styryl pyridines and styryl pyrazines are prepared by allylating with an allylating agent such as allyl halide or allyl methyl carbonate the reaction product of (A) a substituted pyridine and/or pyrazine with (B) a substituted aromatic aldehyde with the proviso that at least one of the components (A) or (B) contains a hydroxyl group which is susceptible to allylation. These allylated styryl pyridines and pyrazines can be homopolymerized or copolymerized with other materials to produce polymers having excellent high temperature resistance, good mechanical strength and excellent processability and are used to make cured composites with heat resistant fibers that have applications in high temperature environments such as engine compartments and/or fire walls.
Claims10
A thermosettable allylated product which comprises the resinous reaction product of
- (A) at least one of
- (1) one or more pyridine compounds represented by the formula ##STR7## (2) one or more pyrazine compounds represented by the formula ##STR8## (3) a mixture of (1) and (2);
- with (B) a substituted aromatic aldehyde represented by the formula ##STR9## wherein each R is independently hydrogen, hydroxyl, methyl or ethyl;
- each R' is independently a hydroxyl or a ##STR10## each R" is independently hydrogen, methyl or ethyl;
- x has a value of 3;
- y has a value of 2;
- z has a value of 1 or 2;
- w has a value of 3 or 4;
- the sum of z and w has a value of 5;
- and with the proviso that at least one of R or R' is a hydroxyl group to provide a hydroxyl functional precursor which is then reacted with
- (C) an allylating agent whereby at least about one percent of the rings of the reaction product of (A) and (B) possess allyl groups.
Dependencies are inferred from the claim text.