Specific examples of lipophilic polymers include compounds obtained by reacting diketene or an alkyl acetoacetate with a polyol having two or more hydroxyl groups, for example, polyester polyols such as polycaprolactone polyols, epoxy resins obtained by reacting epichlorohydrin with a diaryloyl alkane, and acrylic polyols obtained by the addition (co)polymerization of hydroxyl group-containing (me