Avery Dennison Corporation

John O Landers

Sebastian S Plamthottam

Roger H Mann

Ronald Ugolick

Karl Josephy

Richard R Vargas

Ramon Roman

A hot melt pressure sensitive adhesive composition comprising a tackified ethylene-propylene rubber modified with a copolymer of a styrene ethylene-propylene block copolymer and/or a styrene ethylene -butylene block is provided. The pressure sensitive adhesive exhibits high cohesive strength and adhesion to polar and apolar surfaces.

Styrene ethylene-butylene and ethylene-propylene block copolymer hot

A pressure-sensitive structural adhesive is formed by applying a thin layer of pressure-sensitive adhesive to one or both sides of a core layer of partially cured structural adhesive. The pressure-sensitive adhesive provides a tacky surface allowing a temporary bond at room temperature. Upon curing of the construction, the bond properties change to that of a structural adhesive, providing a strong permanent bond. Upon cure, the skin layer or layers of pressure-sensitive adhesive are absorbed into the layer of structural adhesive.

Pressure-sensitive structural adhesive

There are provided pressure-sensitive adhesives which comprise free radical cured mixtures of at least one crosslinkable olefin polymer and at least one tackifying organic additive, preferably a hydrogenated additive, which is substantially nonresponsive to action of free radicals and present in an amount sufficient to tackify the cured mixture of polymer and additive.

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Duarte, CA, United States of America

John O Landers