Abstract: Provided is a surface-treated calcium carbonate that can make a vinyl chloride-based resin composition less colorable in a weathering test and excellent in impact strength. The surface-treated calcium carbonate is a calcium carbonate subjected to treatment with a surface treatment agent in which a proportion of saturated fatty acid contained in a fatty acid is 85% by mass or more, and has a content of elemental iron of 0.01% by mass or less, a content of elemental zinc of 0.1 to 2% by mass introduced by the treatment with the surface treatment agent, and a BET specific surface area of 5 to 30 m2/g.

Abstract: Provided is a surface-treated calcium carbonate that can make a vinyl chloride-based resin composition less colorable in a weathering test and excellent in impact strength. The surface-treated calcium carbonate is a calcium carbonate subjected to treatment with a surface treatment agent in which a proportion of saturated fatty acid contained in a fatty acid is 85% by mass or more, and has a content of elemental iron of 0.01% by mass or less, a content of elemental zinc of 0.1 to 2% by mass introduced by the treatment with the surface treatment agent, and a BET specific surface area of 5 to 30 m2/g.

Abstract: A vinyl chloride-vinyl acetate copolymer resin composition which is excellent in storage stability and can reduce the baking temperature is provided. The vinyl chloride-vinyl acetate copolymer resin composition comprises: 70 to 300 parts by mass of surface-treated calcium carbonate obtained by surface-treating calcium carbonate with a fatty acid or a derivative thereof based on 100 parts by mass of a vinyl chloride-vinyl acetate copolymer resin having a vinyl acetate content of 8 to 12% by mass, and it is characterized in that a BET specific surface area of the surface-treated calcium carbonate is 10 to 40 m2/g, and an amount of the calcium carbonate surface-treated is 0.1×10?2 g/m2 to 0.4×10?2 g/m2 per m2/g of the BET specific surface area of the surface-treated calcium carbonate.

Abstract: A vinyl chloride-vinyl acetate copolymer resin composition which is excellent in storage stability and can reduce the baking temperature is provided. The vinyl chloride-vinyl acetate copolymer resin composition comprises: 70 to 300 parts by mass of surface-treated calcium carbonate obtained by surface-treating calcium carbonate with a fatty acid or a derivative thereof based on 100 parts by mass of a vinyl chloride-vinyl acetate copolymer resin having a vinyl acetate content of 8 to 12% by mass, and it is characterized in that a BET specific surface area of the surface-treated calcium carbonate is 10 to 40 m2/g, and an amount of the calcium carbonate surface-treated is 0.1×10?2 g/m2 to 0.4×10?2 g/m2 per m2/g of the BET specific surface area of the surface-treated calcium carbonate.

Abstract: There are provided a silyl-terminated resin composition and a method for producing the same, the silyl-terminated resin composition being superior in storage stability before curing and providing a cured product which has a low initial modulus and can maintain the low modulus even after a heat-accelerated test. The silyl-terminated resin composition comprises a surface-treated calcium carbonate and a silyl-terminated resin, wherein the surface-treated calcium carbonate is obtained by surface-treating calcium carbonate having a BET specific surface area in the range of 1 m2/g to 60 m2/g with a fatty acid, and has an alkali metal content in the range of 500 ?g/g to 2000 ?g/g and the free fatty acid as determined by ethanol extraction in the range of 1.8 to 2.5% by mass.

Abstract: There are provided a silyl-terminated resin composition and a method for producing the same, the silyl-terminated resin composition being superior in storage stability before curing and providing a cured product which has a low initial modulus and can maintain the low modulus even after a heat-accelerated test. The silyl-terminated resin composition comprises a surface-treated calcium carbonate and a silyl-terminated resin, wherein the surface-treated calcium carbonate is obtained by surface-treating calcium carbonate having a BET specific surface area in the range of 1 m2/g to 60 m2/g with a fatty acid, and has an alkali metal content in the range of 500 ?g/g to 2000 ?g/g and the free fatty acid as determined by ethanol extraction in the range of 1.8 to 2.5% by mass.

Abstract: Provided are an impregnated calcium carbonate that hardly flies but has excellent dispersibility in a polymer composition, a method for producing the impregnated calcium carbonate, and a polymer composition including the impregnated calcium carbonate. The impregnated calcium carbonate is obtained by surface treating calcium carbonate with at least one of a fatty acid, a resin acid, and derivatives of them to yield a surface treated calcium carbonate and impregnating the surface treated calcium carbonate with an organic compound in a liquid state at a normal temperature in an amount of 3 to 22 parts by weight with respect to 100 parts by weight of the surface treated calcium carbonate.

Abstract: A calcium carbonate having a surface treated with a surface treating agent containing a sodium salt or a potassium salt of a fatty acid, the surface treating agent containing a sodium salt or a potassium salt of palmitic acid in an amount of PW in terms of acid, the surface treating agent containing a sodium salt or a potassium salt of stearic acid in an amount of SW in terms of acid, a total amount of PW and SW being PW+SW?90, a ratio of PW to SW being 0.30?PW/SW?1.1, the surface-treated calcium carbonate having a BET specific surface area of SA2 of 15?SA2?48, and the sodium salt or the potassium salt of the fatty acid being used for the treatment in an amount of FA and a ratio (FA/SA2) being 0.095?FA/SA2?0.135.

Abstract: Provided are an impregnated calcium carbonate that hardly flies but has excellent dispersibility in a polymer composition, a method for producing the impregnated calcium carbonate, and a polymer composition including the impregnated calcium carbonate. The impregnated calcium carbonate is obtained by surface treating calcium carbonate with at least one of a fatty acid, a resin acid, and derivatives of them to yield a surface treated calcium carbonate and impregnating the surface treated calcium carbonate with an organic compound in a liquid state at a normal temperature in an amount of 3 to 22 parts by weight with respect to 100 parts by weight of the surface treated calcium carbonate.

Abstract: The invention provides a surface-treated calcium carbonate that when incorporated into a paste resin, can impart low viscosity and high thixotropy and offers excellent storage stability, and paste resin compositions containing the same. The surface-treated calcium carbonate is a calcium carbonate surface-treated with a surface treatment agent containing a sodium salt or potassium salt of a fatty acid, wherein the total content of a sodium salt and a potassium salt of lauric acid, a sodium salt and a potassium salt of palmitic acid and a sodium salt and a potassium salt of stearic acid in the surface treatment agent is 80% by weight or more, the content of the sodium salt and potassium salt of lauric acid is within the range of 30% to 60% by weight, the content of a sodium salt and a potassium salt of an unsaturated fatty acid in the surface treatment agent is 5% by weight or less, and the BET specific surface area is 10 m2/g or more.

Abstract: A calcium carbonate having a surface treated with a surface treating agent containing a sodium salt or a potassium salt of a fatty acid, the surface treating agent containing a sodium salt or a potassium salt of palmitic acid in an amount of PW in terms of acid, the surface treating agent containing a sodium salt or a potassium salt of stearic acid in an amount of SW in terms of acid, a total amount of PW and SW being PW+SW?90, a ratio of PW to SW being 0.30?PW/SW?1.1, the surface-treated calcium carbonate having a BET specific surface area of SA2 of 15?SA2?48, and the sodium salt or the potassium salt of the fatty acid being used for the treatment in an amount of FA and a ratio (FA/SA2) being 0.095?FA/SA2?0.135.

Abstract: The invention provides a surface-treated calcium carbonate that when incorporated into a paste resin, can impart low viscosity and high thixotropy and offers excellent storage stability, and paste resin compositions containing the same. The surface-treated calcium carbonate is a calcium carbonate surface-treated with a surface treatment agent containing a sodium salt or potassium salt of a fatty acid, wherein the total content of a sodium salt and a potassium salt of lauric acid, a sodium salt and a potassium salt of palmitic acid and a sodium salt and a potassium salt of stearic acid in the surface treatment agent is 80% by weight or more, the content of the sodium salt and potassium salt of lauric acid is within the range of 30% to 60% by weight, the content of a sodium salt and a potassium salt of an unsaturated fatty acid in the surface treatment agent is 5% by weight or less, and the BET specific surface area is 10 m2/g or more.

Abstract: Surface-treated calcium carbonate characterized by giving, upon analysis by the method of mercury penetration, a void diameter distribution curve which has a peak for the most probable void diameter at smaller than 0.03 ?m and has a most probable void volume of 0.05 to 0.5 cm3/g; and a pasty resin composition containing the surface-treated calcium carbonate. The calcium carbonate preferably comprises one obtained by surface-treating calcium carbonate having a BET specific surface area of 10 to 100 m2/g with an unsaturated fatty acid (A) and a saturated fatty acid (B).

Abstract: Surface-treated calcium carbonate characterized by giving, upon analysis by the method of mercury penetration, a void diameter distribution curve which has a peak for the most probable void diameter at smaller than 0.03 ?m and has a most probable void volume of 0.05 to 0.5 cm3/g; and a pasty resin composition containing the surface-treated calcium carbonate. The calcium carbonate preferably comprises one obtained by surface-treating calcium carbonate having a BET specific surface area of 10 to 100 m2/g with an unsaturated fatty acid (A) and a saturated fatty acid (B).