| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a coating agent composition for sand mold casting which can reduce sagging and can provide a coating film having a proper thickness. <P>SOLUTION: The coating agent composition for sand mold casting comprises a spherical refractory aggregate having a sphericity of 0.88 to 1.00 and a non-spherical refractory aggregate having a sphericity of 0.30 or more and less than 0.88. The weight ratio between the spherical refractory aggregate and the non-spherical refractory aggregate (spherical refractory aggregate/non-spherical refractory aggregate) is 0.010 to 0.136, and both the spherical refractory aggregate and the non-spherical refractory aggregate are not hollow. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
