| 摘要 |
<p>A polypropylene resin composition which has satisfactory moldability in injection molding, is excellent in flow mark properties during molding and in weld appearance, and is suitable for producing injection-molded articles such as exterior automotive parts; and a moldability modifier for use in the composition. The moldability modifier for polypropylene resins comprises at least one of a propylene homopolymer and a propylene random polymer which have a die swell ratio of from 1.5 to 2.5 and a ratio of the weight-average molecular weight (Mw) to the number-average molecular weight (Mn), as measured by gel permeation chromatography (GPC) (Q value: Mw/Mn), of 7 to 13. The polypropylene resin composition is obtained by mixing the modifier with a propylene/ethylene block copolymer, an ethylene or styrene elastomer, an inorganic filler, etc.</p> |
