Heat-resistant flameproof compositions
AssigneeRhone-Poulenc Industries
InventorMaurice Ducloux
Life of this patent
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Abstract
Heat-curable compositions are disclosed based on a prepolymer obtained by reacting (a) a N,N'-bis-imide of an unsaturated dicarboxylic acid of the formula ##STR1## in which D represents a divalent radical containing a carbon-carbon double bond and A is a divalent radical which possesses at least 2 carbon atoms, and (b) a di-primary diamine of the general formula NH.sub.2 --B -- NH.sub.2, in which B represents a divalent radical which does not have more than 30 carbon atoms, in a ratio of number of mols of bis-imide/number of mols of diamine of between 1.2 and 5, the composition containing up to 15% by weight, relative to the weight of the prepolymer, of red phosphorus in the form of a powder having a mean particle size of less than 200.mu..
Claims6
A heat-curable composition based on a prepolymer obtained by reacting (a) an N,N'-bis-imide of an unsaturated dicarboxylic acid of the formula ##STR5## in which D represents a divalent radical containing a carbon-carbon double bond and A is a divalent radical which possesses at least 2 carbon atoms, and (b) a di-primary diamine of the general formula NH.sub.2 -- B -- NH.sub.2, in which B represents a divalent radical which does not have more than 30 carbon atoms, in a ratio of number of mols of bis-imide/number of mols of diamine of between 1.2 and 5, wherein the composition contains up to 15% by weight, relative to the weight of the prepolymer, of red phosphorus in the form of a powder having a mean particle size of less than 200.mu..
A heat-curable composition based on a prepolymer obtained by reacting (a) a bis-imide of the formula ##STR6## and (b) a diamine of the formula NH.sub.2 -- B -- NH.sub.2 (II), in which formulae the symbol Y represents H, CH.sub.3 or Cl and the symbols A and B, which may be identical or different, represent a phenylene or cyclohexylene radical or a radical ##STR7## where T represents --CH.sub.2 --, --C(CH.sub.3).sub.2 --, --O--, --SO.sub.2 -- or --S--, in a ratio of number of mols of bis-imide/number of mols of diamine of between 1.2 and 5, wherein the composition contains up to 15% by weight, relative to the weight of the prepolymer, of red phosphorus in the form of a powder having a mean particle size of less than 200.mu..
Dependencies are inferred from the claim text.