Patent ID: 8030431

Claim:
A curable mixture consisting of: (a) 10 to 100 percent by weight, in relation to the sum of the components (a) and (c), of at least one bifunctional aromatic cyanate having two cyanate groups or polyfunctional aromatic cyanate having three or more cyanate groups or a prepolymer formed from at least one bifunctional aromatic cyanate having two cyanate groups or polyfunctional aromatic cyanate or a mixture formed from the above-mentioned cyanates and/or prepolymers, the bifunctional aromatic cyanate or polyfunctional aromatic cyanate is chosen from the group consisting of the compounds of formula: in which R 1 is hydrogen, methyl or bromine and X is selected from the group consisting of —CH 2 —, —CH(CH 3 )—, —C(CH 3 ) 2 —, —C(CF 3 ) 2 —, —O—, —S—, —SO 2 —, —C(═O)—, —OC(═O)—, —OC(═O)O—, and in which n is a number from 0 to 10 and R 2 is hydrogen or methyl; and in which n has the above-mentioned meaning; (b) 0.5 to 30 percent by weight, in relation to the sum of the components (a) and (c), of at least one curing agent that is monofunctional, bifunctional or polyfunctional aromatic amine, (c) at least one monofunctional, bifunctional or polyfunctional epoxy resin, said epoxy resin present in amount from minimum amount thereof that is curable with components (a) and (b) to 90 percent by weight, in relation to the sum of components (a) and (c), whereby said curable mixture contains epoxy resin (c), (d) from minimum catalytically effective amount to 5 percent by weight, in relation to the sum of the components (a) and (c) of, at least one catalyst selected from the group consisting of transition metal compounds and boron trihalides, and (e) optionally at least one member selected from the group consisting of (i) at least one filler, (ii) at least one auxiliary, and (iii) both (i) and (ii).