espuma de polipropileno, seu processo de preparação, e uso de polipropileno

• Main Authors: Eberhard Ernst, MANFRED STADLBAUER
• Format: Patent
• Language: Portuguese
• Published: 26.06.2018
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

The present invention relates to a foam comprising a polypropylene, wherein said polypropylene is produced in the presence of a metallocene catalyst, and the foam and/or the polypropylene has (have) a. a branching index g' of less than 1.00 and b. a strain hardening index (SHI@1s -1 ) of at least 0.30 measured by a deformation rate dµ / dt of 1.00 s -1 at a temperature of 180 °C, wherein the strain hardening index (SHI) is defined as the slope of the logarithm to the basis 10 of the tensile stress growth function (lg ( · E + )) as function of the logarithm to the basis 10 of the Hencky strain (lg (µ)) in the range of Hencky strains between 1 and 3