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AssigneeRhone-Poulenc Industries
InventorsMax Gruffaz, Jean-Louis Locatelli
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A polymer is disclosed that results from the reaction of: A. a polyimide of the formula: ##STR1## in which the symbol D represents a divalent radical selected from the class consisting of the radicals ##STR2## WHERE Y represents H, CH.sub.3 or Cl and m is 0 or 1, the symbol A represents an organic radical of valency n which may contain up to 30 carbon atoms, and n represents a number at least equal to 2; B. a polyamine of the formula (NH.sub.2).sub.p B (II) in which the symbol B represents an organic radical of valency p which may contain up to 30 carbon atoms, and p represents a number at least equal to 2; and C. a linear polyester, free from aliphatic unsaturation, and of molecular weight at least equal to 1,500, the amounts of these reactants being such that there are 1.2 to 5 imide groups per NH.sub.2 group, and the polyester represents up to 50% of the weight of the polyimide/polyamine/polyester combination. A process for making the polymer is also disclosed.
A polymer resulting from the reaction of:
Dependencies are inferred from the claim text.
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No related US applications are recorded in the indexed filing history.
Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors: unsaturated polyimide precursors
Macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
Term ended 6 Sep 1994 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
The present invention relates to new polymers with imide groups.
These polymers are characterized in that they result from the reaction of:
A. a polyimide of the formula ##STR3## in which the symbol D represents a divalent radical selected from the class consisting of the radicals ##STR4## WHERE Y represents H, CH.sub.3 or Cl and m is 0 or 1, the symbol A represents an organic radical of valency n which may contain up to 30 carbon atoms, and n represents a number at least equal to 2;
The examples which follow will still further serve to illustrate the invention:
6.5 g of polyester [P.sub.1 ] are dissolved with stirring in 14.4 g of bis-(4-aminophenyl)-methane kept at 170.degree. C.
65 g of N,N',4,4'-diphenylmethane-bis-maleimide are then introduced into the mixture, while maintaining the temperature at 170.degree. C.