POLYPROPYLENE RESIN COMPOSITION AND MOLDING THEREOF

• Main Authors: FUKUNAGA SHOICHI, SUGIMOTO TAKAYA, OSADA MASAHIRO
• Format: Patent
• Language: English; Japanese
• Published: 13.04.2017
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

PROBLEM TO BE SOLVED: To provide a polypropylene resin composition that maintains high flowability, which cannot be achieved by conventional polypropylene resin compositions, and also offers an excellent physical balance between rigidity and impact strength, and a molding thereof.SOLUTION: A propylene resin composition comprises a propylene-α-olefin block copolymer having a specific structure, a propylene-α-olefin block copolymer having a specific α-olefin content and inherent viscosity, and elastomer, at a specific rate. There is also provided a molding thereof.SELECTED DRAWING: None 【課題】 従来のポリプロピレン系樹脂組成物が成し得なかった高い流動性を維持しつつ、剛性及び衝撃強度の物性バランスにも優れたポリプロピレン系樹脂組成物、及びその成形体を提供する。【解決手段】 特定の構造を有するプロピレン-α-オレフィブロック共重合体、特定のα-オレフィン含量、固有粘度を有するプロピレン-α-オレフィブロック共重合体、及びエラストマーとを、特定の割合で配合して得られるプロピレン系樹脂組成物及びその成形体。【選択図】なし