Asphalt compositions for roofing applications, methods for making the same, and filled asphalt material comprising the same

A filled asphalt material for use in roofing applications comprising:

• an asphalt composition present in an amount of about 30 to about 99 wt. % of the filled asphalt material, the asphalt composition comprising non-oxidized base asphalt and a low MW polyolefin which is present in an amount of no more than about 1.8 wt %, based on the total weight of the asphalt composition, wherein said asphalt composition has a softening point from about 87.8 to about 160° C. (about 190 to about 320° F.), and a penetration of greater than about 12 dmm @ 25° C., and wherein the low MW polyolefin has a crystallinity of from about 30 to about 100 percent (%);
• and
• an inorganic filler, recycled asphalt materials, or a combination thereof, which are present in a total amount of from about 1 to about 70 wt % of the filled asphalt material.

A method for making an asphalt composition for use in roofing applications, the method comprising the step of combining a low MW polyolefin and a non-oxidized base asphalt at an elevated temperature to form the asphalt composition, wherein the low MW polyolefin is present in an amount of no more than about 1.8 wt %, based on the total weight of the asphalt composition, wherein the asphalt composition has a softening point from about 87.8 to about 160° C. (about 90 to about 320° F.), and a penetration of greater than about 12 dmm @ 25° C., and wherein the low MW polyolefin has a crystallinity of from about 30 to about 100 percent (%).