Patent ID: 7449539

Claim:
A silsesquioxane derivative represented by Formula (1): wherein each R is alkyl having 1 to 45 carbon atoms, a substituted or non-substituted aryl, or a substituted or non-substituted arylalkyl; Y is a group represented by Formula (a); in the alkyl having 1 to 45 carbon atoms, optional hydrogen may be replaced by fluorine, and optional —CH 2 — may be replaced by —O—, —CH═CH—, cycloalkylene or cycloalkenylene; in alkylene of the substituted or non-substituted arylalkyl, optional hydrogen may be replaced by fluorine, and optional —CH 2 — may be replaced by —O—, —CH═CH— or cycloalkylene: wherein each X is independently hydrogen, alkyl having 1 to 45 carbon atoms, a substituted or non-substituted phenyl, or a group having a functional group, and at least one X is hydrogen or a group having a functional group; in the alkyl having 1 to 45 carbon atoms, optional hydrogen may be replaced by fluorine, and optional —CH 2 — may be replaced by —O—, —CH═CH—, cycloalkylene or cycloalkenylene; the group having a functional group is chloroalkyl, aminoalkyl, hydroxyalkyl, ethenyl, 2-propenyl, or acetoxyalkyl, and the carbon number of alkylene in these groups is 2 to 4.