Abstract: A surface-treated heavy calcium carbonate is provided which is useful for a film exactly controlled in its pore diameter and for easily hydrolyzable polyester resins. A heavy calcium carbonate is also provided which is compounded in a curable resin such as a one-component moisture-curable adhesive and a sealant either without any pre-drying treatment or by simple pre-drying treatment. A surface-treated heavy calcium carbonate satisfying 13,000?A?25,000, 0.8?B?3.0, C?0.55, and 0?D1?1000, or 8,000?A?25,000, 0.8?B?15, 0?C1?1000, and 0?C2?150 wherein: A: specific surface area (cm2/g), B: average particle diameter (?m): 50% particle diameter (d50) (?m), C: 10% particle diameter (?m), D1, C1: water content at between 25° C. and 300° C. by a Karl-Fischer method (heating vaporization method) (ppm), and C2: water content at between 200° C. and 300° C. by the same method.

Abstract: A surface-treated heavy calcium carbonate is provided which is useful for a film exactly controlled in its pore diameter and for easily hydrolyzable polyester resins. A heavy calcium carbonate is also provided which is compounded in a curable resin such as a one-component moisture-curable adhesive and a sealant either without any pre-drying treatment or by simple pre-drying treatment. A surface-treated heavy calcium carbonate satisfying 13,000?A?25,000, 0.8?B?3.0, C?0.55, and 0?D1?1000, or 8,000?A?25,000, 0.8?B?15, 0?C1?1000, and 0?C2?150 wherein: A: specific surface area (cm2/g), B: average particle diameter (?m): 50% particle diameter (d50) (?m), C: 10% particle diameter (?m), D1, C1: water content at between 25° C. and 300° C. by a Karl-Fischer method (heating vaporization method) (ppm), and C2: water content at between 200° C. and 300° C. by the same method.

Abstract: A filler for powder coating materials is provided, which comprises inorganic parties having a Mohs hardness of 1 to 4 and satisfying the following particle size distribution of the following relationships (1) to (5): 2?A?30??(1); Cumulative 50 vol. % diameter (median diameter) determined by Microtrac FRA [?m]; 0?B?35??(2); Cumulative undersize for one-half the cumulative 50 vol. % diameter (median diameter) determined by Microtrac FRA [vol. %]; 1?C?25??(3); Value obtained by dividing cumulative 90 vol. % diameter determined by Microtrac FRA by cumulative 10 vol. % diameter [-]; 1?D?6??(4); Value obtained by dividing cumulative 75 vol. % diameter determined by Microtrac FRA by cumulative 25 vol. % diameter [-]; and E?100??(5); Maximum particle diameter in particle-diameter fraction frequency distribution determined by Microtrac FRA [?m].

Abstract: A filler for powder coating materials is provided, which comprises inorganic parties having a Mohs hardness of 1 to 4 and satisfying the following particle size distribution of the following relationships (1) to (5): 2?A?30??(1); Cumulative 50 vol. % diameter (median diameter) determined by Microtrac FRA [?m]; 0?B?35??(2); Cumulative undersize for one-half the cumulative 50 vol. % diameter (median diameter) determined by Microtrac FRA [vol. %]; 1?C?25??(3); Value obtained by dividing cumulative 90 vol. % diameter determined by Microtrac FRA by cumulative 10 vol. % diameter [-]; 1?D?6??(4); Value obtained by dividing cumulative 75 vol. % diameter determined by Microtrac FRA by cumulative 25 vol. % diameter [-]; and E?100??(5); Maximum particle diameter in particle-diameter fraction frequency distribution determined by Microtrac FRA [?m].