Preparation method of polypropylene-base resin composition

Details Preparation method of polypropylene-base resin composition Preparation method of polypropylene-base resin composition

C - Chemistry, Metallurgy

08

F

400/3049

C08F 299/00 (2006.01) C08K 3/00 (2006.01) C08L 53/00 (2006.01)

Patent

CA 1225777

- 20 - ABSTRACT Disclosed herein is a preparation method of a polypropylene-base resin composition, which method comprises heating at a temperature of 170° - 280°C a mixture containing a crystalline ethylene-propylene block copolymer having a specific composition, a rubbery ethylene-propylene copolymer having a specific composition and viscosity, an inorganic filler having a specific particle size and an organic peroxide in their respective specific amounts. The thus-obtained polypropylene-base resin composition is suitable for use in the production of large moldings such as automobile bumpers, fenders and body sidemembers owing to its excellent low-temperature impact resistance, high molding fluidity, good paintability and high stiffness as well as its low preparation cost.

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