| 摘要 |
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 <IMAGE> 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 NH2 -B - NH2, 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 . |
