Propylene-type polymer and hot-melt adhesive agent

摘要

Provided are a propylene-based polymer which enhances heat creep resistance and a hot-melt adhesive having excellent heat creep resistance. A propylene-based polymer which satisfies the following (1) and (2): (1) 125≦a modulus of elasticity in tension (MPa) at 23° C.≦400; and (2) 100≦an elongation at break (%) at 23° C.≦1,000, and a hot-melt adhesive containing the propylene-based polymer in an amount of 1 to 50% by mass.

主权项

1. A propylene-based polymer, having:
a modulus of elasticity in tension at 23° C. of 125 MPa to 400 MPa; an elongation at break at 23° C. of 100% to 1,000%; a stereoregularity [mmmm] of 60 mol % to 80 mol %; a weight-average molecular weight (Mw) of 10,000 to 55,000; a molecular weight distribution (Mw/Mn) of ≦2.5; and a racemic meso racemic meso fraction [rmrm] of <2.5 mol %.