Patent ID: 8163863

Claim:
A functional polysilane in which a hydrosilylatable compound is additionally bonded to a polysilane having a structural unit represented by the following formula (1): wherein R 1 represents a hydrogen atom, an organic group, or a silyl group; and “n” denotes an integer of not less than 1, wherein the polysilane comprises a copolysilane having the structural unit represented by the formula (1) and at least one selected from the group consisting of structural units represented by the following formulae (2) to (4): wherein R 2 , R 3 and R 4 are the same or different and independently represent an organic group or a silyl group; and “r”, “s”, and “t” independently denote an integer of not less than 0, with the proviso that the total of the numbers “r”, “s”, and “t” is an integer of not less than 1, the copolysilane has a branched structural unit which is at least one selected from the group consisting of the structural unit represented by the formula (3) and the structural unit represented by the formula (4), the proportion of the structural unit represented by the formula (1) relative to the branched structural unit [the former/the latter (molar ratio)] is 90/10 to 3/97 in terms of silicon atom, the hydrosilylatable compound has a group containing a carbon-carbon unsaturated bond and at least one functional group selected from the group consisting of a hydroxyl group, a carboxyl group, an acid anhydride group, a carbonyl group, an ester group, an epoxy group, an amino group, a substituted amino group, a carbamoyl group, a nitro group, a cyano group, an oxetanyl group, and a halogen atom.