Patent ID: 8653169

Claim:
An adhesive comprising: a copolymer comprising at least 80 wt % of units derived from propylene and from about 1 to about 12 wt % of units derived from a C 6 to C 10 alpha-olefin; wherein the copolymer is produced in a single polymerization zone using a single polymerization catalyst; wherein the copolymer has a weight average molecular weight of at least 10,000 and less than 50,000, a heat of fusion between 10 and 70 J/g and a weight average molecular weight/number average molecular weight ratio of between 4 and 9; and optionally up to 20 wt % of at least one additive selected from waxes and functionalized polyolefins; wherein the adhesive has the following properties: at least 50% fiber tear at −18° C. using Inland paper board as a substrate; a viscosity of less than 1000 mPa-sec at 190° C.; a set time of less than 4 seconds; and a toughness of at least 3.4 megajoules/m 3 .