| 摘要 |
Provided are: a surface-treated calcium carbonate filler which can exhibit an excellent thixotropic property when added to a curable resin composition, can exhibit a high elongation degree at a low modulus, and can have such a recovery rate that a load to be applied onto a contact surface can be reduced; and a curable resin composition which contains the filler. A surface-treated calcium carbonate filler which comprises a synthetic calcium carbonate that has a surface treated with a fatty acid-type organic material containing a fatty acid salt and has a floc structure, said filler being characterized in that the ratio (Sr) of the amount of a fatty acid salt for which a counter ion is of monovalent and which is contained in surface-treating agents, which are substances eluted as free materials when the surface-treated calcium carbonate is refluxed with ethanol, to the total amount of the surface-treating agents is 10 to 30 wt%, and the porosity (Po) of the surface-treated calcium carbonate upon the consolidation of the surface-treated calcium carbonate is 38 to 45 wt%; and a curable resin composition which contains the filler. |
