Propylene polymer composition.

摘要

The present invention relates to a propylene polymer composition comprising: 65 to 95% by weight of a propylene homopolymer having (a) an intrinsic viscosity ([ eta 1]) of 0.5 to 3.5 dl/g, (b) a xylene soluble content at ordinary temperature (Xs) of not more than 3% by weight, and a difference ( DELTA [ eta 1]) between ([ eta 1]) of xylene insoluble portion at the ordinary temperature and ([ eta 1]) of xylene soluble portion at the ordinary temperature of not more than 0.5 dl/g, (c) an isotactic pentad fraction (IP) falling within the range represented by the following equation: IP >/= -0.624[ eta 1] + 97.5, and (d) a crystallization temperature (Tc) falling within the range represented by the following equation: Tc >/= -2.33[ eta 1] + 116.0; and 5 to 35% by weight of a propylene-ethylene random copolymer having (e) an intrinsic viscosity ([ eta 2]) of less than 2.8 dl/g and (f) an ethylene content of 10 to 35% by weight. Moldings obtained from the composition of the present invention are good in luster and high in both impact resistance and stiffness, and can find various applications as moldings well balanced in physical properties.