POLYPROPYLENE COMPOSITION

• Main Author: YASUDA YOSHITOYO
• Format: Patent
• Language: English
• Published: 19.03.2002
• Edition: 7
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

PROBLEM TO BE SOLVED: To provide a polypropylene composition having a high melt tension, excellent in molding property and hardly undergoing a drop in melt tension after recycle molding. SOLUTION: The polypropylene composition is a polyolefin composition comprising 0.01-5.0 pts.wt. of a component (a) and 100 pts.wt. of a component (b), and has an intrinsic viscosity [ηTn] within the range of 0.2-10 dl/g measured in tetralin at 135 deg.C, and is obtained by mixing the components so that the intrinsic viscosity [ηT] of the final composition is within the range of 0.2-10 dl/g, the component (a): a high-molecular weight polyethylene comprising an ethylene homopolymer or an ethylene/α-olefin copolymer containing at least 50 wt.% of a polymerized ethylene unit and having an intrinsic viscosity [ηA] within the range of 15-100 dl/g, the component (b): a propylene (co)polymer comprising a propylene homopolymer or a propylene/α-olefin copolymer containing at least 50 wt.% of a polymerized propylene unit and having an intrinsic viscosity [ηB] within the range of 0.2-10 dl/g.