Patent ID: 8741995
Filing Date: 2014-06-03
Classification: C01F,C01P,C08K,C09C

Abstract:
1. A calcium carbonate surface-treated with a surface-treating agent containing a sodium salt and/or a potassium salt of a fatty acid, the surface-treating agent containing a sodium salt or a potassium salt of palmitic saturated acid in an amount of PW (% of total fatty acid content by weight), the surface-treating agent containing a sodium salt or a potassium salt of saturated stearic acid in an amount of SW (% of total fatty acid content by weight), a total amount of PW and SW being PW+SW≧90, a ratio of PW to SW being 0.30≦PW/SW≦1.1, a sodium salt or a potassium salt of a saturated fatty acid except palmitic acid and stearic acid, among the fatty acids, being a saturated fatty acid having 12, 14, and 20 to 31 carbon atoms, a sodium salt or a potassium salt of lauric acid and a sodium salt or a potassium salt of myristic acid being included in a total amount of 5% of total fatty acid content by weight or less, a sodium salt or a potassium salt of an unsaturated fatty acid being included in an amount of 5% of total fatty acid content by weight or less, the surface-treated calcium carbonate having a BET specific surface area of SA wherein the surface-treated calcium carbonate is extracted with diethyl ether to afford a treating agent extraction amount of 0.1% by weight.