| abstract |
A polyorganosilsesquioxane fine powder which is surface-treated with an organosilicon comound containing a quaternary ammonium group, represented by the formula (I) or (II): <IMAGE> (I) <IMAGE> (II) wherein R1 represents an alkyl group, a substituted or unsubstituted aralkyl group, or a group represented by (CnH2nO)mZ wherein Z represents a hydrogen atom or an alkyl group, symbol n is an integer of 2 to 4, and symbol m is an integer of 1 to 20; R2 and R3 each independently represents a hydrogen atom, an alkyl group or a hydroxyalkyl group; Q1 and Q2 each independently represents an alkylene group; R4 represents an alkyl group or a phenyl group; R5 represents an alkyl group having 1 to 4 carbon atoms; X- represents an anion; and symbol a is an integer of 0 to 3. |