Poly(higher-1-olefin-co-propylene) copolymers as hot-melt, pressure-sensitive adhesives
AssigneeEastman Kodak Company
InventorsRichard L. McConnell, Doyle A. Weemes, Frederick B. Joyner
Life of this patent
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Abstract
This invention relates to single component, hot-melt, pressure-sensitive adhesives based on propylene/higher 1-olefin copolymers containing 40-60 mole % of the higher 1-olefin. Suitable comonomers include 1-hexene through 1-decene. These new adhesives can be readily applied to substrates such as tape by means of conventional hot-melt coating equipment and thereby eliminate the solvent pollution problems associated with the application of current solvent-based pressure-sensitive adhesives. Our hot-melt coated tapes generally have pressure-sensitive adhesive properties at least equivalent to those of solvent coated pressure-sensitive tapes.
Claims12
A hot melt, pressure sensitive adhesive comprising an amorphous propylene/higher 1-olefin copolymer containing 40 to 60 mole percent higher 1-olefin having a melt viscosity range at 190.degree.C. of 10,000 cp. to 75,000 cp., a density of 0.85 to 0.86, a glass transition temperature of -30.degree. to -45.degree.C., and having no melting point measurable by Differential Scanning Calorimetry, wherein said higher 1-olefin is a member of the group consisting of 1-hexene, 1-heptene, 1-octene, 1-nonene and 1-decene.
A hot melt, pressure sensitive adhesive comprising an amorphous propylene/higher 1-olefin copolymer containing 40 to 60 mole percent higher 1-olefin having a melt viscosity range at 190.degree.C. of 13,000 cp. to 50,000 cp., a density of 0.85 to 0.86, a glass transition temperature of -30.degree. to -45.degree.C., and having no melting point measurable by Differential Scanning Calorimetry, wherein said higher 1-olefin is a member of the group consisting of 1-hexene, 1-heptene, 1-octene, 1-nonene and 1-decene.
Dependencies are inferred from the claim text.