REINFORCED POLYPROPYLENE RESIN COMPOSITION

PROBLEM TO BE SOLVED: To provide a resin compsn. which has a good moldability, is economically excellent, and, when injection molded, gives an instrument panel for automobiles, etc., having an excellent external appearance, good mechanical properties, and a high heat resistance. SOLUTION: This comps...

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Bibliographic Details
Main Authors ARAI KATSUNORI, ICHIKAWA SHIGEJI, SANADA MASASHI
Format Patent
LanguageEnglish
Published 18.05.1999
Edition6
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Summary:PROBLEM TO BE SOLVED: To provide a resin compsn. which has a good moldability, is economically excellent, and, when injection molded, gives an instrument panel for automobiles, etc., having an excellent external appearance, good mechanical properties, and a high heat resistance. SOLUTION: This compsn. comprises 57-78 wt.% polypropylene resin (A) which comprises a crystalline propylene-ethylene block copolymer optionally contg. a propylene homopolymer and has an ethylene content of 1.5-8 wt.%, a melt flow rate(MFR) at 230 deg.C under 2.16 kg-load of 5-15 g/10 min, and an isotactic pentad fraction measured by 13C-NMR of propylene homopolymer blocks of 96% or higher, 6-21 wt.% ethylene-octene copolymer rubber (B) having an MFR of 0.3-2.0 g/10 min and a density of 0.865-0.875 g/cm , and 15-22 wt.% talc (C) having an average particle size of 3-6 μm.
Bibliography:Application Number: JP19970294012