US 8,962,233 B2  24  23  Specific  examples  of  the  groups  having  these  cycloaliphatic groups or noncyclic hydrocarbon groups will  be shown below. In the formulae, * represents a site of con- nection to A (when A is a single bond, Ar).  Of these, the following structures are preferred.  •~o  OH  J-,  ~OH  nylthioxy group or a p-tolylthioxy group; an alkoxycarbonyl  group such as a methoxycarbonyl group or a butoxycarbonyl  group; an aryloxycarbonyl group such as a phenoxycarbonyl  group; an acetoxy group; a linear or branched alkyl group  such as a methy  1  group, an ethy  1  group, a propy  1  group, a buty  1  group, a heptyl group, a hexyl group, a dodecyl group or a  2-ethylhexyl group; a cycloalkyl group such as a cyclohexyl  group; an alkenyl group such as a vinyl group, a propenyl  group or a hexenyl group; an alkynyl group such as an acety› lene group, a propynyl group or a hexynyl group; an aryl  group such as a phenyl group or a tolyl group; a hydroxyl  group; a carboxyl group; a sulfonate group; a carbonyl group;  and the like. Of these, a linear or branched alkyl group is  preferred from the viewpoint of the simultaneous attainment  of roughness improvement and sensitivity enhancement. 