| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for removing protein from a calcareous material of biological origin, by which protein contained in a calcareous material of biological origin can be thoroughly removed at a low cost, so that solid calcium carbonate usable as an industrial raw material can be obtained, and a resin composition containing solid calcium carbonate obtained by the method. <P>SOLUTION: The method for removing protein from a calcareous material of biological origin includes immersing a calcium carbonate-based calcareous material of biological origin in an aqueous alkali hydroxide solution of≥2.5 mol/L concentration, hydrolyzing and removing protein in the calcareous material of biological origin. The resin composition contains a resin matrix comprising one or both of a thermoplastic resin and a thermosetting resin, and solid calcium carbonate obtained by the method, wherein a content of the solid calcium carbonate is 1-70 wt.% of the total resin composition. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
