Patent ID: 6677403
Filing Date: 2004-01-13
Classification: C08L

Abstract:
A propylene resin composition comprising a propylene resin and an elastic material,the propylene resin being selected from the group consisting of a propylene homopolymer, a copolymer of propylene and an &agr;-olefin having up to 20 carbon atoms and mixtures thereof, wherein the &agr;-olefin content of the copolymer is no greater than 10 mol %, and the elastic material being selected from the group consisting of a copolymer of ethylene and another &agr;-olefin having 3 to 20 carbon atoms, a styrenic elastic material, and mixtures thereof wherein the elastic material is present in the propylene resin composition in an amount from 0.05 to 50 wt. %, and a separated micro phase structure of the elastic material in the composition has a percolation structure in which the phase of elastic material is infinitely continuous in the resin solid space, and has a velocity v of sound propagated as a longitudinal wave being 3,000 m/s or less.