RESIN COMPOSITION CONTAINING INORGANIC NUCLEATING AGENT, MOLDING THEREOF AND PROCESS FOR PRODUCING THE SAME

• Main Author: FUJIWARA KENICHI
• Format: Patent
• Language: English
• Published: 02.02.2007
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

Propylene resin composition (A) comprising a combination of (a) propylene block copolymer or propylene homopolymer having a propylene chain moiety of >= 0.90 isotactic pentad fraction; (b) when the component (a) is a propylene homopolymer, 0. 5 to 20 mass% of ethylene-alpha-olefin copolymer rubber, or when the component (a) is a propylene block copolymer, 0 to 10 mass% of ethylene- alpha-olefin copolymer rubber; (c) 0 to 20 mass% of high-density polyethylene; and (d) per 100 parts by mass of the sum of components (a), (b) and (c), 0.4 to 3.0 parts by mass of inorganic nucleating agent. Thus, there is provided a propylene resin composition of specific gravity minimized that has high rigidity at room temperature and higher temperature and excels in impact resistance at freezing point and lower temperature, having an odor level admissible in food product usages. Further, there are provided a multilayer structure having the above composition in at least one layer thereof, a container obtained by thermal forming, an injection molded item, an extrusion molded item and processes for producing them. ® KIPO & WIPO 2007