MINERAL FILLED POLYPROPYLENE COMPOSITION

• Main Authors: WILLEMS, SANDER, CIARAFONI, MARCO, MASSARI, PAOLA, ROHRMANN, JÜRGEN
• Format: Patent
• Language: English; French; German
• Published: 26.10.2016
• 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

A polypropylene composition for the production of molded articles, such as finished parts for the automotive industry, has melt flow rate (230°C, 2.16 Kg) of at least 25 g /10 min and comprises: (A) 50-95% of a composition having an intrinsic viscosity of the fraction soluble in xylene at 25 °C of 3.0-5.0 dl/g and comprising: (Al) 70-95% of a propylene homopolymer having a Polydispersity Index (PI) of 4.3-10, a fraction insoluble in xylene at 25 °C higher than 90% and a MFR (230°C, 2.16 Kg) of 100- 250 g/10 min; (A2) 5-30% of a copolymer of propylene with 36-44% of ethylene-derived units; (B) optionally up to 45% of a heterophasic propylene polymer, having MFR (230°C, 2.16 Kg) of 10-25 g/10 min, flexural modulus higher than 1400 MPa, and comprising 5-20% of a copolymer rubber component and 80-95% of a matrix propylene polymer component; (C) 2-10% of an ethylene based elastoplastic copolymer; and (D) optionally up to 20% of talc.