| 摘要 |
PROBLEM TO BE SOLVED: To obtain the cheap subject material excellent in whiteness, good in optical characteristics and useful as an antistatic agent or an electroconductive material for a plastic, a coating material, a paper, a rubber, a sealant, a sol of polyvinyl chloride or the like by coating an electroconductive metal oxide on the surface of calcium carbonate. SOLUTION: This electroconductive calcium carbonate is obtained by suspending and mixing an electroconductive metal oxide (preferably tin oxide containing an activating agent such as antimony) with calcium carbonate (preferably in a needle shape) in an organic solvent to provide the calcium carbonate coated with the electroconductive metal oxide, and carrying out the heat treatment of the coated calcium carbonate at 100-600 deg.C, preferably in a reductive atmosphere. The electroconductive calcium carbonate has 1-1,000 pts.wt., preferably 10-30 pts.wt. electroconductive metal oxide based on 100 pts.wt. calcium carbonate on the surface of the calcium carbonate.
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