Polypropylene resic composition for motorcar-trimming materials

Details Polypropylene resic composition for motorcar-trimming materials Polypropylene resic composition for motorcar-trimming materials

C - Chemistry, Metallurgy

08

L

C08L 53/00 (2006.01)

Patent

CA 2143395

A polypropylene resin composition for use as a motorcar-trimming material comprises 95 to 85% by weight of an ethylene-propylene block copolymer (A) whose ethylene-propylene copolymer part has an average intrinsic viscosity ([?]) ranging from 7 to 12 g/dl and 5 to 15% by weight of an inorganic filler (B) having an average particle size ranging from 1 to 4µ m, wherein the composition has a melt index (MI) in the range of from 15 to 40 g/10 min, a flexural modulus (FM) ranging from 2300 to 3000 MPa and a low-temperature brittle point (LB) of less than 30°C and wherein the values FM and LB of the composition satisfy the following inequality: FM > 8.4 x LB + 2300. The polypropylene resin composition is excellent in the balance between rigidity and low-temperature brittle point and in flowability.

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