Triazine ring-containing polymer and film-forming composition comprising same

A triazine ring-containing polymer characterized by comprising repeating unit structures represented by the following formula (2):

• wherein R and R′ independently from each other mean a hydrogen atom or an alkyl, alkoxy, aryl or aralkyl group, R″ means an alkyl, aralkyl, aryl, alkylamino, alkoxysilyl-containing alkylamino, aralkylamino, arylamino, alkoxy, aralkyloxy or aryloxy group, and Ar means at least one selected from the group consisting of groups represented by the following formulas (6) to (12) and (14) to (19):
• wherein
• R16 to R76 and R81 to R128 independently from each other mean a hydrogen or halogen atom, or a carboxyl, sulfone, branched or unbranched C1 to C10 alkyl or branched or unbranched C1 to C10 alkoxy group,
• W1 means NR129 in which R129 means a hydrogen atom or a branched or unbranched C1 to C10 alkyl group,
• W2 and W3 independently from each other mean a single bond, CR130R131 in which R130 and R131 independently from each other mean a hydrogen atom or a branched or unbranched C1 to C10 alkyl group with a proviso that these alkyl groups may be fused together to form a ring, C═O, S, SO, SO2, or NR129 in which R129 has the same meaning as defined above,
• X1 and X2 independently from each other mean a single bond, a branched or unbranched C1 to C10 alkylene group, or the following formula (20):
• wherein R132 to R135 independently from each other mean a hydrogen or halogen atom, or a carboxyl, sulfone, branched or unbranched C1 to C10 alkyl or branched or unbranched C1 to C10 alkoxy group, and
• Y1 and Y2 independently from each other mean a single bond, or a branched or unbranched C1 to C10 alkylene group.