Polipropileno heterofásico com elevada escoabilidade e excelentes propriedades de impacto à baixa temperatura

• Main Authors: SVEIN NENSETH, PETAR DOSHEV
• Format: Patent
• Language: Portuguese
• Published: 16.06.2015
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The present invention relates to a heterophasic polypropylene resin comprising a propylene homo- or copolymer matrix (A) and an ethylene-propylene rubber phase (B) dispersed within the matrix, wherein the heterophasic polypropylene resin has a fraction insoluble in p-xylene at 25°C (XCU) with an intrinsic viscosity of 1.5 dl/g or less, determined according to DIN EN ISO 1628-1 and -3, and a fraction soluble in p-xylene at 25°C (XCS) with an amount of propylene monomer units of 50 to 75 mol%, and a MFR (2.16 kg, 230°C) of more than 100 g/10 min, determined according to ISO 1133; the heterophasic polypropylene resin obtainable in the presence of a catalyst system comprising an asymmetric catalyst wherein the catalyst system has a porosity of less than 1.40 ml/g.