HOT-MELT, PRESSURE-SENSITIVE ADHESIVES

摘要

This invention relates to blends of plasticizing oils and compatible tackifiers with substantially amorphous or semicrystalline olefin copolymers containing at least one C3 to C5 linear alpha -olefin and 15 to 60 mole percent of at least one C6 to C10 linear alpha -olefin which are useful as hot-melt, pressure-sensitive adhesives. The unmodified copolymer base resins have melt viscosities in the range of 5,000 cp up to about 1,000,000 cp at 190 DEG C. The addition of the plasticizing oils and compatible tackifiers to the copolymer base resin causes a dramatic and unexpected increase in the shear adhesion failure time in addition to improved coatability as well as substantial increases in probe tack and peel adhesion values of the copolymers.