Thermosetting polymers and prepolymers and a process for making them by polycondensation of a pyridine having at least three methyl substituants
AssigneeOffice National d'Etudes et de Recherches Aerospatiales (O.N.E.R.A.)
InventorsMarcel P. Ropars, Bertrand M. Bloch
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Abstract
The thermosetting polymers and prepolymers of the invention are obtained by ondensing a pyridine comprising at least three methyl groups, such as trimethyl-2,4,6 pyridine, with an aromatic dialdehyde, such as trephthalic aldehyde at a temperature ranging from about 150.degree. to about 220.degree. C. They can be shaped and set by maintaining the temperature between about 200.degree. and about 300.degree. C. They are suitable for making laminates.
Claims22
A thermosetting prepolymer which comprises the condensation products of a pyridine containing at least three methyl-groups with an aromatic dialdehyde.
Dependencies are inferred from the claim text.