| http://www.w3.org/ns/prov#value | - A pressure-sensitive adhesive material as claimed in claim 12 wherein the backing material comprises a copolymer obtainable by reacting an alkoxy alkyl acrylate or methacrylate with a different alkoxy alkyl acrylate or methacrylate, no monomers other than alkoxy alkyl acrylates or methacrylates or polymers formed therefrom being present in the reaction mixture. 21.
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