Patent ID: 8293442

Claim:
A resin particle having a volume average particle diameter of 10 nm to 500 nm, obtained by a process comprising polymerizing an addition polymerizable monomer comprising a silsesquioxane (a) represented by Formula (I) or by copolymerizing the silsesquioxane (a) with an addition polymerizable monomer (b), where R 1 to R 7 each independently represent a group selected from the group consisting of hydrogen, alkyl having 1 to 40 carbon atoms, substituted or unsubstituted aryl, and substituted or unsubstituted arylalkyl; any hydrogen in the alkyl group is optionally substituted by fluorine and any —CH 2 — is optionally substituted by —O—, —CH═CH—, cycloalkylene or cycloalkenylene; any hydrogen in alkylene in the arylalkyl group is optionally substituted by fluorine and any —CH 2 — is optionally substituted by —O— or —CH═CH—; and A 1 represents an addition polymerizable functional group, and wherein monomer (b) is at least one monomer selected from the group consisting of (meth)acrylic acid, styrene and derivatives thereof.