BLENDS OF SUBSTANTIALLY AMORPHOUS OLEFIN COPOLYMERS AND COMPATIBLE TACKIFYING RESINS USEFUL AS HOT-MELT, PRESSURE-SENSITIVE ADHESIVES

摘要

TITLE BLENDS OF SUBSTANTIALLY AMORPHOUS OLEFIN COPOLYMERS AND COMPATIBLE TACKIFYING RESINS USEFUL AS HOT-MELT, PRESSURE-SENSITIVE ADHESIVES This invention relates to blends of compatible tackifiers with substantially amorphous olefin copolymers containing at least one C3 to C5 linear a-olefin and 40 to 60 mole percent of at least one C6 to C10 liner a-olefin which are useful as hot-melt, pressure-sensitive adhesives. The unmodified copolymer base resins have melt viscosities in the range of >75,000 cp up to about 1,000,000 cp at 190.degree.G. The addition of the 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.