Aromatic polyamide-imides functionalised with alkenyloxy groups, a method for their preparation and their use to prepare crosslinked polymers.

摘要

New aromatic polyamideimides whose chains contain alkenyloxy end groups.
<??>More precisely, these polymers correspond to the formula:
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in which: D denotes a valency bond, an atom or a divalent group; B denotes a trivalent aromatic radical containing at least 6 carbon atoms; m is at least equal to 1; and X denotes the radical of formula:
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in which R = H or CH3, R' = CH3 and n = 0, 1, 2 or 3. These polymers are obtained by direct reaction of an aromatic diisocyanate, of a tricarboxylic acid monoanhydride and of a carboxylic monoacid substituted by an alkenyloxy group.
<??>These polyamideimides can be employed especially for the production of coating films and of moulded articles and they can be crosslinked using heat.