| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polishing agent which not only removes stains without hurting a plastic substrate but also makes a painted surface smooth to restore the luster, thus realizing excellent lustering effect, by dispersing in water an abrasive agent having a specific value of average particle size and new Mohs hardness of 2 to 6, respectively. SOLUTION: This polishing agent uses an abrasive agent having an average particle size of 0.1-5μm and a new Mohs hardness of 2 to 6. As examples of such an abrasive agent, enumerated are diatomaceous earth, kaolin, calcium carbonate, alumina, mica, borax, gypsum, hard gypsum, dolomite, cryolite and apatite. They are used singly or as a mixture of two or more of them. An org. solvent is pref. blended with this polishing agent. The org. solvent (e.g. a petroleum-derived hydrocarbon) is usually blended by emulsifying into water dispersed with the abrasive agent. Further, a surfactant is pref. blended. The blending ration is: 1-30 wt.% of the abrasive agent, 20 to 50 wt.% of the org. solvent, 1 to 10 wt.% of the surfactant and water.
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