mixtures of copolymers olefinici substantially amorphous, and confer appiccicosita compatible resins, useful as adhesives in the molten mass warm, sensitive apressione.

摘要

{PG,1 This invention relates to blends of compatible tackifiers with substantially amorphous olefin copolymers containing at least one C{HD 3 {L to C{HD 5 {L linear {60 -olefin and 40 to 60 mole percent of at least one C{HD 6 {L to C{HD 10 {L linear {60 -olefin which are useful as hot-melt, pressure-sensitive adhesives. The unmodified copolymer base resins have melt viscosities in the range of {22 75,000 cp up to about 1,000,000 cp at 190{20 {0 C. 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.