Patent ID: 8748563

Claim:
A curable composition comprising: a) at least one benzoxazine compound, and b) at least one mono-sulfonic acid ester of formula (I), wherein each R a is independently selected from C 1 -C 40 alkyl groups, C 1 -C 40 haloalkyl groups, C 3 -C 40 cycloalkyl groups, C 3-40 alkenyl groups, C 3-40 alkynyl groups, C 7 -C 40 aralkyl groups, or C 6 -C 40 aryl groups, wherein said alkyl, haloalkyl, cycloalkyl, aralkyl and aryl groups are optionally substituted and R b is a bicyclic alkyl group, comprising 10 to 30 carbon ring atoms, wherein said bicyclic alkyl group is substituted by at least one substituent selected from oxo, hydroxyl, amine, cyanide, halogen, linear, branched, saturated or unsaturated C 1 -C 40 alkyl, linear, branched, saturated or unsaturated C 1 -C 40 haloalkyl, C 7 -C 40 aralkyl, or C 6 -C 40 aryl.