Patent ID: 8545980
Filing Date: 2013-10-01
Classification: C08F,C08L,D01F,D04H,Y10T

Abstract:
1. A polypropylene resin produced by melting and kneading a first crystalline polypropylene and 12 to 22 wt % of a second crystalline polypropylene having a meso pentad fraction less than the first crystalline polypropylene, wherein the polypropylene resin has the following properties (1) to (5): (1) a melt flow rate (MFR) of 6 to 100 g/10 minutes, (2) a molecular weight distribution (Mw/Mn), measured by gel permeation chromatography, of 3 to 6, and (3) a 116° C. non-eluted component content (100-W116(%)) of 50% or more and a content of components eluted at 90° C. or less (W90) of 10 to 30%, measured by temperature-rising fractional chromatography (TREF), (4) a meso pentad fraction (mmmm) of 85 to 94 mol %, and (5) a boiling n-heptane soluble component of 3 to 15 wt %; wherein the second crystalline polypropylene satisfies the following (a) to (d): (a) meso pentad fraction [mmmm] of 20 to 60%, (b) racemic pentad fraction [rrrr] and [1−mmmm] that satisfy the following expression (c) racemic meso racemic pentad fraction [rmrm] of 2.5 mol % or more, and (d) meso triad fraction [mm], racemic triad fraction [rr] and triad fraction [mr] that satisfy the following expression,