Patent ID: 7767739

Claim:
A cyanato group-containing cyclic phosphazene compound represented by the following formula (1): in the formula (1), n represents an integer of 3 to 15, A represents a group selected from the group consisting of an A1 group, an A2 group and an A3 group shown below, and at least one group is an A3 group: A1 group: an alkoxy group having 1 to 8 carbon atoms which may be substituted with at least one group selected from an alkyl group having 1 to 6 carbon atoms, an alkenyl group and an aryl group, A2 group: an aryloxy group having 6 to 20 carbon atoms which may be substituted with at least one group selected from an alkyl group having 1 to 6 carbon atoms, an alkenyl group and an aryl group, and A3 group: a group selected from the group consisting of a cyanatophenyloxy group represented by the formula (2) shown below, a cyanatophenyl-substituted phenyloxy group represented by the formula (3) shown below, a cyanatophenyl-substituted phenyloxy group represented by the formula (4) shown below, a cyanatophenyl-substituted indanoxy group represented by the formula (5) shown below and a cyanatoindane-substituted phenyloxy group represented by the formula (6) shown below: in the formula (4), Y represents O, S, SO 2 , CH 2 , CHCH 3 , C(CH 3 ) 2 , C(CF 3 ) 2 , C(CH 3 )CH 2 CH 3 or CO, in the formulas (5) and (6), R 1 and R 2 represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a cycloalkyl group or a phenyl group.