Method for preparation of a moulded composite from a bulk moulding compound

A bulk moulding compound comprising one or more cyanate ester, a catalyst, a filler and reinforcement fibres, wherein the one or more cyanate ester is independently selected from

• a) a difunctional cyanate ester compound of formula (I)
• wherein
• R1 through R8 are independently selected from the group consisting of hydrogen, linear C1-10 alkyl, halogenated linear C1-10 alkyl, branched C4-10 alkyl, halogenated branched C4-10 alkyl, C3-8 cycloalkyl, halogenated C3-8 cycloalkyl, C1-10 alkoxy, halogen, phenyl and phenoxy;
• Z1 indicates a direct bond or a divalent moiety selected from the group consisting of —O—, —S—, —S(═O)—, —S(═O)2—, —CH2—, —CH(CH3)—, —C(CH3)2—, —CH(CF3)—, —C(CF3)2—, —C(═O)—, —C(═CH2)—, —C(═CCl2)—, —Si(CH3)2—, linear C1-10 alkanediyl, branched C4-10 alkanediyl, C3-8 cycloalkanediyl, 1,2-phenylene, 1,3-phenylene, 1,4-phenylene, —N(R13)— wherein R13 is selected from the group consisting of hydrogen, linear C1-10 alkyl, halogenated linear C1-10 alkyl, branched C4-10 alkyl, halogenated branched C4-10 alkyl, C3-8 cycloalkyl, phenyl and phenoxy, and moieties of formulas
• wherein X is independently selected from hydrogen and halogen;
• and oligomers, polymers or mixtures thereof;
• and/or
• b) a polyfunctional cyanate ester of formula (II)
• wherein
• n is an integer from 1 to 20;
• and
• R10 and R11 are identical or different and independently from each other selected from the group consisting of hydrogen, linear C1-10 alkyl and branched C4-10 alkyl;
• and oligomers, polymers or mixtures thereof,
• and mixtures of cyanate esters of formula (I) and (II);
• and
• wherein the catalyst is aluminum(III)acetylacetonate.