Patent ID: 8921474
Filing Date: 2014-12-30
Classification: A61F,B32B,C08L,C09J,D04H,Y10T

Abstract:
1. A hot melt adhesive composition, comprising a blend of the following components: about 5% to about 50% by weight of an olefin block copolymer; about 10% to about 70% by weight of a first tackifying resin having a softening point of at least about 95° C.; about 0 to 65% of second tackifying resin different than the first tackifying resin; about 0 to about 60% by weight of a plasticizer; and about 0% to about 20% by weight of an aromatic reinforcing resin having a softening point equal to or higher than 115° C.; about 1% to about 40% by weight of a secondary polymer having a relatively low crystallinity, which low crystallinity is greater than about 30 Joules/gram and equal to or less than 250 Joules/gram, said secondary polymer selected from the group consisting of a single cite or metallocene catalyzed ethylene-based copolymer having a C 3 to C 18 alpha-olefin comonomer, a single site or metallocene catalyzed propylene-ethylene copolymer, a blend of the ethylene-based copolymers, a blend of the propylene-ethylene copolymers, and a blend of one or more of the ethylene-based copolymers with one or more of the propylene-ethylene copolymers, said secondary polymer being a polymer that is different from the olefin block copolymer, the first and second tackifying resins, and the reinforcing resin; and about 0.1% to about 5% by weight of a stabilizer; wherein the components total 100% by weight of the composition, and the viscosity of the composition is equal to or less than about 20,000 mPa·s at 163° C.