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US 4,471,107 AGranted
Process for the prepartion of vinylpolystyrylpyridine compounds
AssigneeAmerican Cyanamid Company
InventorSteven L. Peake
Life of this patent
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Abstract
An improved method to prepare vinylpolystyrylpyridines comprises reacting a polymethylpyridine and an aromatic dialdehyde to form a 1:1 adduct and thereafter adding a methylvinylpyridine to terminate the adduct. Vinylpolystyrylpyridines are useful as cross-linking agents in bis-imide resin matrix compositions comprising reinforcing fillers.
Claims16
A process for the preparation of a vinylpolystyrylpyridine which comprises
- (a) reacting a polymethylatedpyridine and an aromatic dialdehyde at a temperature in the range of about 80.degree. to about 150.degree. C. in the presence of an active anhydride, until the ratio of a 1:1 adduct of said polymethylated pyridine and said aromatic dialdehyde is in the range of 4 to 5.5;
- (b) adding a methylvinylpyridine compound to the reaction mixture of step (a) and continuing the heating until formation of the desired vinylpolystyrylpyridine is complete;
- and
- (c) recovering the vinylpolystyrylpyridine.
1 more element
Dependencies are inferred from the claim text.