Addition curing polystyryl pyridine
AssigneeRockwell International Corporation
InventorsJoseph J. Ratto, Charles L. Hamermesh
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Abstract
A fire-resistant polystyryl pyridine polymer is provided by two separate reactions: (1) the condensation of a methylated pyridine, an aromatic dialdehyde, and a methyl vinyl pyridine; and (2) by the addition curing of the condensation product. The condensation product provides a prepolymer suitable for forming a composite with another material such as graphite fibers, and the addition reaction provides a means to cure the prepolymer without eliminating volatile products.
Claims7
A prepolymer which comprises the condensation products of a methylated pyridine, an aromatic dialdehyde, and a methyl vinyl pyridine.
A thermosetting prepolymer which comprises the condensation products of a dimethyl pyridine, terephthaldicarboxaldehyde, and 2-methyl-5-vinylpyridine.
A method of preparing a prepolymer which comprises reacting a methylated pyridine, an aromatic dialdehyde, and a methyl vinyl pyridine at a temperature ranging from about 80.degree. C. to 150.degree. C. in the presence of an active anhydride and an acid.
Dependencies are inferred from the claim text.