Patent ID: 8076407

Claim:
A hot melt adhesive consisting essentially of: (a) from 20 to 75 wt % of a mixture wherein the mixture comprises (i) from 10 to 50 wt % of a crystalline metallocene polypropylene copolymer component that has a viscosity range of about 60 to about 7000 cP at 170° C. and (ii) from 20 to 50 wt % of an amorphous α-olefin polymer component (b) from 0.1 to 15 wt % of a functionalized polyolefin; (c) from 20 to 60 wt % of a tackifier; (d) from 5 to 40 wt% of a wax that has a melt temperature between 49° C. and 121° C.; and (e) from 0.1 to 1.5 wt % of a stabilizer or antioxidant wherein the adhesive has a viscosity range of from about 700 cP to about 10,000 cP at 180° C. and the adhesive has a heat stress cleavage improvement of at least 10° C. over an adhesive without the functionalized polyolefin and wherein the wt % is based on the total weight of the adhesive.