PROPYLENE RESIN COMPOSITION AND INTERIOR AUTOMOTIVE MEMBER COMPRISING THE SAME

摘要

A propylene-based resin composition has good external appearance due to good weld appearance and low gloss and has excellent mechanical properties such as impact resistance and stiffness. The composition is well-balanced in the external appearance and mechanical properties. Automotive interior trims made of the composition are also described. The propylene-based resin composition comprises (A) 60 to 90% by weight of a propylene-based resin (1) comprising 80 to 88% by weight of 23 DEG C p-xylene insolubles (a) and 12 to 22% by weight of 23 DEG C p-xylene solubles (b), (2) the insolubles (a) having an isotactic pentad fraction of 95% or higher, a relaxation time ( tau ) of 0.01 to 0.35 second at an angular frequency ( omega ) of 10 DEG /sec when measured by melt viscoelastometry and a molecular weight distribution index (PDI) of 1 to 18 which is expressed by omega 2/10 omega 1 wherein omega 1 is an angular frequency at which a storage modulus (G') as measured by melt viscoelastometry is 2 x 10<2> Pa and omega 2 is an angular frequency at which a storage modulus (G') as measured by melt viscoelastometry is 2 x 10<4> Pa, and (3) the solubles (b) having an intrinsic viscosity eta ­ (in decalin at 135 DEG C) of 3.3 dl/g or higher and an ethylene unit content of 43% by weight or smaller; (B) 0 to 10% by weight of a rubber-like elastomer; and (C) 10 to 30% by weight of talc. The automotive interior trims are produced by injection-molding the composition.