| 摘要 |
PROBLEM TO BE SOLVED: To provide a lightweight resin molding having excellent impact resistance and rigidity. SOLUTION: This resin molding 1 includes at least polypropylene 2 and porus silica 3 formed of silica primary particles. The porus silica has functional groups each checking a bond between the silica primary particles on a face wherein the silica primary particles contact with each other, a part or all are crushed to the silica primary particles in time of mixture with the polypropylene, and the silica primary particles are dispersed in the polypropylene. The porus silica has a process for introducing hydrophobic groups on wet gel surfaces after a gelation process, and is obtained by use of non-critical drying in a drying process. COPYRIGHT: (C)2009,JPO&INPIT
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