Patent ID: 8470449
Filing Date: 2013-06-25
Classification: C08L,Y10T

Abstract:
1. An adhesive comprising a propylene-based polymer composition (X1) comprising: (A) a propylene-based polymer (PP) satisfying the following requirements (1) and (2), in an amount of 1 to 30 parts by weight, and (B) a propylene/ethylene/α-olefin copolymer satisfying the following requirements (I) to (III), in an amount of 70 to 99 parts by weight, with the proviso that the total amount of the component (A) and the component (B) is 100 parts by weight, (1) the polymer (A) has a melting point (Tm), as measured by a differential scanning calorimeter (DSC), of not lower than 110° C. but not higher than 170° C., (2) the polymer (A) has an isotactic pentad fraction (mmmm fraction) of not less than 90%, (I) the copolymer (B) constitutional units derived from propylene in amounts of 73.1 to 83.0% by mol, constitutional units derived from ethylene in amounts of 14.0 to 16.9% by mol and constitutional units derived from an α-olefin of 4 to 20 carbon atoms in amounts of 3.0 to 10.0% by mol, (II) the copolymer (B) has an isotactic triad fraction (mm), as calculated by (III) the copolymer (B) has a molecular weight distribution (Mw/Mn, Mw: weight-average molecular weight, Mn: number-average molecular weight, both being in terms of polystyrene), as measured by gel permeation chromatography (GPC), of not more than 3.5.