HEAVY CALCIUM CARBONATE PRODUCTION METHOD THEREFOR AND RESIN COMPOSITION CONTAINING SAID CALCIUM CARBONATE

摘要

When blended into a film that precisely controls the micropore diameter, a surface-treated heavy calcium carbonate useful for a polyester-based resin that is easy to hydrolyze, or a curable resin such as a one-component moisture curable adhesive or sealant, it is not preliminarily dried. Or simple predrying to provide sufficient heavy calcium carbonate. Surface-treated heavy calcium carbonate that satisfies Expression 13,000≤A≤25,000, 0.8≤B≤3.0, C≥0.55, 0≤D1≤1000, or Expression 8,000≤A≤25,000, 0.8≤B≤15, 0≤C1≤1000 And heavy calcium carbonate satisfying 0 ≦ C 2 ≦ 150. However, A: specific surface area (cm ² / g), B: average particle diameter (µm), 50% particle diameter (d50), C: 10% particle diameter (µm) of the particle size distribution, D1, C1: Karl Fischer Water (ppm) measured between 25-300 degreeC by the method (heating vaporization method), C2: Water (ppm) similarly measured between 200-300 degreeC.