Polyamide-imide precondensates

Details Polyamide-imide precondensates Polyamide-imide precondensates

1976-06-07

1978-10-17

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

174110N, 260 292N, 260 302, 260 304N, 260 308DS, 260 326NA, 260857UN, 428435, 428474, C08G 6926, C08G 7314

Patent

active

041212665

ABSTRACT:
A polyamide-imide precondensate which is solid at room temperature, but is fusible and soluble in polar solvents. It is manufactured by first condensing 1 mole of diamine with 2 moles of tricarboxylic acid anhydride in a diol as the solvent, to give a diimide-dicarboxylic acid, then esterifying the diimide-dicarboxylic acid with the diol and finally effecting the polycondensation by adding 1 mole of diamine per mole of diester. The precondensate may be used, as a melt, as a solution in organic solvents or as an aqueous dispersion, for coating electrical conductors.

REFERENCES:
patent: 3518230 (1970-06-01), Sheffer et al.
patent: 3852106 (1974-12-01), Incremona et al.
patent: 3975345 (1976-08-01), Fessler
patent: 4066631 (1977-01-01), Dimmig

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