ing effect of the oil b) cannot be obtained, and if it exceeds 50.0 wt %, storage stability declines.Examples of the compound c) having an alcoholic hydroxyl group in the molecular structure, which is a component of this invention, are as follows.Examples of alcohols are lower alcohols such as ethanol, propanol and isopropanol; polyfunctional alcohols such as ethylene glycol, propylene glycol 1,3-