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 wherein R 1 through R 8 are independently selected from the group consisting of hydrogen, linear C 1-10 alkyl, halogenated linear C 1-10 alkyl, branched C 4-10 alkyl, halogenated branched C 4-10 alkyl, C 3-8 cycloalkyl, halogenated C 3-8 cycloalkyl, C 1-10 alkoxy, halogen, phenyl and phenoxy; Z 1 indicates a direct bond or a divalent moiety selected from the group consisting of -O-, -S-, -S(=O)-, -S(=O) 2 -, -CH 2 -, -CH(CH 3)-, -C(CH 3) 2 -, -CH(CF 3)-, -C(CF 3) 2 -, -C(=O)-, -C(=CH 2)-, -C(=CCl 2)-, -Si(CH 3) 2 -, linear C 1-10 alkanediyl, branched C 4-10 alkanediyl, C 3-8 cycloalkanediyl, 1,2-phenylene, 1,3-phenylene, 1,4-phenylene, -N(R 13)- wherein R 13 is selected from the group consisting of hydrogen, linear C 1-10 alkyl, halogenated linear C 1-10 alkyl, branched C 4-10 alkyl, halogenated branched C 4-10 alkyl, C 3-8 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 wherein n is an integer from 1 to 20; and R 10 and R 11 are identical or different and independently from each other selected from the group consisting of hydrogen, linear C 1-10 alkyl and branched C 4-10 alkyl; and oligomers, polymers or mixtures thereof; and mixtures of cyanate esters of formula and; and wherein the catalyst is independently selected from the group consisting of 4,4' methylene-bis(2,6-diethylaniline) (M-DEA), 4,4'-methylene-bis(3-chloro-2,6-diethyl¬aniline) (M-CDEA), aluminum acetylacetonate, and mixtures thereof. a) a difunctional cyanate ester compound of formula wherein R 1 through R 8 are independently selected from the group consisting of hydrogen, linear C 1-10 alkyl, halogenated linear C 1-10 alkyl, branched C 4-10 alkyl, halogenated branched C 4-10 alkyl, C 3-8 cycloalkyl, halogenated C 3-8 cycloalkyl, C 1-10 alkoxy, halogen, phenyl and phenoxy; Z 1 indicates a direct bond or a divalent moiety selected from the group consisting of -O-, -S-, -S(=O)-, -S(=O) 2 -, -CH 2 -, -CH(CH 3)-, -C(CH 3) 2 -, -CH(CF 3)-, -C(CF 3) 2 -, -C(=O)-, -C(=CH 2)-, -C(=CCl 2)-, -Si(CH 3) 2 -, linear C 1-10 alkanediyl, branched C 4-10 alkanediyl, C 3-8 cycloalkanediyl, 1,2-phenylene, 1,3-phenylene, 1,4-phenylene, -N(R 13)- wherein R 13 is selected from the group consisting of hydrogen, linear C 1-10 alkyl, halogenated linear C 1-10 alkyl, branched C 4-10 alkyl, halogenated branched C 4-10 alkyl, C 3-8 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 R 1 through R 8 are independently selected from the group consisting of hydrogen, linear C 1-10 alkyl, halogenated linear C 1-10 alkyl, branched C 4-10 alkyl, halogenated branched C 4-10 alkyl, C 3-8 cycloalkyl, halogenated C 3-8 cycloalkyl, C 1-10 alkoxy, halogen, phenyl and phenoxy; Z 1 indicates a direct bond or a divalent moiety selected from the group consisting of -O-, -S-, -S(=O)-, -S(=O) 2 -, -CH 2 -, -CH(CH 3)-, -C(CH 3) 2 -, -CH(CF 3)-, -C(CF 3) 2 -, -C(=O)-, -C(=CH 2)-, -C(=CCl 2)-, -Si(CH 3) 2 -, linear C 1-10 alkanediyl, branched C 4-10 alkanediyl, C 3-8 cycloalkanediyl, 1,2-phenylene, 1,3-phenylene, 1,4-phenylene, -N(R 13)- wherein R 13 is selected from the group consisting of hydrogen, linear C 1-10 alkyl, halogenated linear C 1-10 alkyl, branched C 4-10 alkyl, halogenated branched C 4-10 alkyl, C 3-8 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 wherein n is an integer from 1 to 20; and R 10 and R 11 are identical or different and independently from each other selected from the group consisting of hydrogen, linear C 1-10 alkyl and branched C 4-10 alkyl; and oligomers, polymers or mixtures thereof; and mixtures of cyanate esters of formula and; and wherein the catalyst is independently selected from the group consisting of 4,4' methylene-bis(2,6-diethylaniline) (M-DEA), 4,4'-methylene-bis(3-chloro-2,6-diethyl¬aniline) (M-CDEA), aluminum acetylacetonate, and mixtures thereof. n is an integer from 1 to 20; and R 10 and R 11 are identical or different and independently from each other selected from the group consisting of hydrogen, linear C 1-10 alkyl and branched C 4-10 alkyl; and oligomers, polymers or mixtures thereof; and mixtures of cyanate esters of formula and; and wherein the catalyst is independently selected from the group consisting of 4,4' methylene-bis(2,6-diethylaniline) (M-DEA), 4,4'-methylene-bis(3-chloro-2,6-diethyl¬aniline) (M-CDEA), aluminum acetylacetonate, and mixtures thereof.