| 摘要 |
<p>A composite resin composition which comprises (A) 100 parts by weight of a polypropylene resin, (B) 0.1 to 50 parts by weight of an organic-modified clay, and (C) 0.5 to 30 parts by weight of a polypropylene modified with maleic anhydride, wherein in the modified polypropylene, the content of unreacted maleic anhydride is below the detection limit for quantitative analysis, the proportion of the acid content to the number of polymer chains is 0.8 to 2.0, the molecular-weight distribution is 2.5 or lower, the content of components having a molecular weight of 10,000 or lower is 0.5 wt.% or lower, and the intrinsic viscosity [η] is 1 or higher. A supercritical gas is infiltrated into the composite resin composition and then removed therefrom to obtain a resin foam. Thus, fine cells can be evenly formed at a high density, and high rigidity can be attained.</p> |
