New linear aromatic poly(amide-imide)s whose chains contain groups each of which contains a residue with a latent maleimide functional group. …??More precisely, these polymers are obtained by direct reaction (i) of an aromatic diisocyanate of formula …IMAGE… where A = valency bond or divalent group, with (ii) a monoanhydride of a tricarboxylic acid, of formula …IMAGE… where B = trivalent aromatic group and with (iii) a carboxylic monoacid containing a residue with a latent maleimide functional group, of formula …IMAGE… where R1 = CH3, n = 0, 1, 2 or 3, E = valency bond or -CH2- and D = …IMAGE… with R2 to R7 = H and/or alkyl and F = -O- or -S-. …??After thermal deblocking of the free maleimide functional groups, these poly(amide-imide)s can be employed especially for the production of moulded articles and they can be thermally crosslinked.
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