Polypropylene-based resin composition, process for producing the same and injection molded article

   
   

A polypropylene-based resin composition comprising 0.5 to 10% by weight of a propylene-based polymer component (A1) obtained by polymerizing a monomer mainly composed of propylene, having an intrinsic viscosity [.eta.].sup.A1 measured in tetralin at 135.degree. C. of 5 dl/g or more and a melting peak temperature Tm.sup.A1 measured by a differential scanning calorimeter of 130 to 160.degree. C., 90 to 99.5% by weight of a propylene-based polymer component (A2) obtained by polymerizing a monomer mainly composed of propylene, intrinsic viscosity [.eta.].sup.2 measured in tetralin at 135.degree. C. of less than 5 dl/g.

Una composizione polipropilene-basata nella resina che contiene 0.5 - 10% a peso di un componente propilene-basato del polimero (A1) ottenuto polimerizzando un monomero pricipalmente composto di propilene, avendo una viscosità intrinseca [ eta.].sup.A1 ha misurato in tetralina a 135.degree. Un C. di 5 dl/g o di più e una temperatura peak di fusione Tm.sup.A1 hanno misurato da un calorimetro di scansione differenziale di 130 a 160.degree. C., 90 - 99.5% a peso di un componente propilene-basato del polimero (A2) ottenuto polimerizzando un monomero pricipalmente composto di propilene, viscosità intrinseca [ eta.].sup.2 ha misurato in tetralina a 135.degree. C. di più meno di 5 dl/g.

 
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