Removable pressure-sensitive adhesive tape
AssigneeMinnesota Mining and Manufacturing Company
InventorDonald L. Esmay
Life of this patent
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Abstract
A roll of pressure-sensitive adhesive tape, the adhesive layer of which is an alkyl acrylate polymer which is low-tack and yet sufficiently tacky to adhere reliably to ordinary substrates but, by virtue of being crosslinked and nearly free from polar substituents, it is readily peelable from those substrates after prolonged dwell.
Claims12
Pressure-sensitive adhesive tape comprising a flexible carrier web and a pressure-sensitive adhesive layer comprising a polymer of one or more monomers which are predominantly alkyl acrylate, the alkyl groups of which have an average of 8-12 carbon atoms, and are nearly free from any polar copolymerizable monomer, wherein up to 3 mol percent of said polar copolymerizable monomers comprise strongly polar copolymerizable monomer and up to 15 mol percent of said polar copolymerizable monomers comprise moderately polar copolymerizable monomer, said adhesive layer being crosslinked to provide a 180.degree. peelback value from glass within the range of 5 to 30 N/dm immediately after being applied, which value does not increase more than 20% after 30 days dwell at 22.degree. C., thus assuring both reliable adhesion and clean peelability after prolonged dwell.
Pressure-sensitive adhesive tape comprising a flexible carrier web and a pressure-sensitive adhesive layer comprising a polymer of one or more monomers which are predominantly isooctyl acrylate, and are nearly free from any polar copolymerizable monomer, said adhesive layer being crosslinked to provide a 180.degree. peelback value from glass within the range of 5 to 30 N/dm immediately after being applied, which value does not increase more than 20% after 30 days dwell at 22.degree. C., thus assuring both reliable adhesion and clean peelability after prolonged dwell.
Dependencies are inferred from the claim text.