PROPYLENE RESIN COMPOSITION AND INJECTION MOLDED BODY

• Main Authors: SANADA TOSHIHARU, MARUYAMA TOSHIYA, FUKURODA HIROSHI
• Format: Patent
• Language: English; Japanese
• Published: 15.11.2018
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To provide a propylene resin composition capable of manufacturing a molded body excellent in dimensional stability.SOLUTION: There is provided a propylene resin composition containing: a propylene single monomer (A); a heterophasic propylene polymer material consisting a propylene polymer (I) containing a monomer unit derived from propylene of 80 mass% or more, and a propylene copolymer (II) containing a monomer unit derived from ethylene or the like of 40 mass% to 80 mass% and the monomer unit derived from propylene (B); and an ethylene-α-olefin copolymer (C), having molecular weight distribution of a crystalline polypropylene component of 6.0 or more, and contents of the component (A), the component (B) and the component (C) are 10 to 55 pts.mass, 10 to 55 pts.mass and 10 to 40 pts.mass respectively based on total 100 pts.mass of the component (A), the component (B) and the component (C).SELECTED DRAWING: None 【課題】寸法安定性に優れる成形体を製造できるプロピレン樹脂組成物を提供すること。【解決手段】プロピレン単独重合体（Ａ）；プロピレンに由来する単量体単位を８０質量％以上含有するプロピレン系重合体（Ｉ）と、エチレン等に由来する単量体単位を４０質量％以上８０質量％以下含有し、かつ、プロピレンに由来する単量体単位を含有する、プロピレン共重合体（ＩＩ）とからなるヘテロファジックプロピレン重合材料（Ｂ）；並びにエチレン−α−オレフィン共重合体（Ｃ）を含み、結晶性ポリプロピレン成分の分子量分布が、６．０以上であり、上記成分（Ａ）、上記成分（Ｂ）及び上記成分（Ｃ）の含有量が、成分（Ａ）、成分（Ｂ）及び成分（Ｃ）の合計１００質量部に対して、それぞれ、１０〜５５質量部、１０〜５５質量部及び１０〜４０質量部である、プロピレン樹脂組成物。【選択図】なし