Patent ID: 7423107

Claim:
A polymer obtained by subjecting a silsesquioxane derivative represented by formula (1-0) and a compound having at least two groups capable of reacting with a reactive group in the silsesquioxane derivative to hydrosilylation: wherein R 0 each independently represents alkyl, aryl or arylalkyl; in the alkyl, the number of carbon atoms is from 1 to 40, arbitrary hydrogen may be replaced by fluorine, and arbitrary —CH 2 — may be replaced by —O— or cycloalkylene; in the aryl, arbitrary hydrogen may be replaced by halogen or alkyl having 1-20 carbon atoms; the arylalkyl is constituted by aryl in which arbitrary hydrogen may be replaced by halogen or alkyl having 1-20 carbon atoms, and alkylene in which arbitrary hydrogen may be replaced by fluorine, and arbitrary —CH 2 — may be replaced by —O— or cycloalkylene; in the alkyl having 1-20 carbon atoms as a substituent of the aryl, arbitrary hydrogen may be replaced by fluorine, and arbitrary —CH 2 — may be replaced by —O—, cycloalkylene or phenylene; and Y each represents a group represented by formula (a) or formula (b): wherein X each independently represents hydrogen, chlorine, a group defined as the same as R 0 , or a group having one of —CH═CH— and —C≡C—; in each of formula (a) and formula (b), at least one of X represents hydrogen, or a group having one of —CH═CH— and —C≡C—; and in formula (b), Z represents a single bond, —O— or —CH 2 —.