High Polymer Load Polyolefin Adhesive Compositions

An adhesive composition comprising:

• (a) a polymer blend comprising
• a first propylene-based polymer, wherein the first propylene-based polymer is a homopolymer of propylene or a copolymer of propylene and ethylene or a C4 to C10 alpha-olefin;
• a second propylene-based polymer, wherein the second propylene-based polymer is a homopolymer of propylene or a copolymer of propylene and ethylene or a C4 to C10 alpha-olefin;
• wherein the second propylene-based polymer is different than the first propylene-based polymer;
• wherein the polymer blend has a melt viscosity, measured at 190° C. of about 6,000 to about 60,000 cP;
• and wherein, when subjected to Temperature Rising Elution Fractionation, the polymer blend exhibits:
• a first fraction that is soluble at −15° C. in xylene, the first fraction having an isotactic (mm) triad tacticity of about 70 mol % to about 90 mol %;
• and a second fraction that is insoluble at −15° C. in xylene, the second fraction having an isotactic (mm) triad tacticity of about 85 mol % to about 98 mol %;
• wherein the polymer blend is present in the amount of about 30 to about 60 wt % of the adhesive;
• and
• (b) a tackifier;
• wherein the adhesive composition has a melt viscosity, measured at 140° C. of about 1,500 to about 15,000 cP.