icone oil is substituted with alkenyl groups; dimethylpolysiloxanes which have both molecular terminals blocked with silanol groups and which took part in the condensation reaction but remained unreacted, and silicone oils, in which a part of methyl groups in the polysiloxane is substituted with the groups other than methyl, such as alkenyl groups, phenyl groups, and 3,3,3-trifluoropropyl groups.