Non-polarized medical pressure-sensitive adhesive

Abstract

The crosslinked (meth)acrylate-based pressure-sensitive adhesive is capable of adhering to mammalian skin for at least 10 days. The crosslinked adhesive composition comprises a crosslinked (meth)acrylate-based copolymer without polar groups and a hydrogenated hydrocarbon tackifying resin. The crosslinked adhesive composition is prepared by photocrosslinking a hot-melt processable blend of the (meth)acrylate copolymer and the hydrogenated hydrocarbon tackifying resin. The (meth)acrylate copolymer is the reaction product of an alkyl (meth)acrylate monomer, having an alkyl group containing 4 to 22 carbon atoms and without polar groups, with a copolymerizable photocrosslinker.

Claims

[Claim 1] A crosslinked (meth)acrylate copolymer that does not have polar groups, Hydrogenated hydrocarbon tackifying resin, A crosslinked adhesive composition comprising, the crosslinked adhesive composition, A alkyl (meth)acrylate monomer having 4 to 22 carbon atoms and an alkyl group that does not have a polar group or an aromatic moiety, At least one bifunctional (meth)acrylate monomer constituting 0.01 phr to 1.00 phr of the reaction mixture, At least one chain transfer agent constituting 0.05 phr to 0.50 phr of the reaction mixture, Copolymerizable photocrosslinking agent and (meth)acrylate copolymer containing the reaction product of a reaction mixture containing, and Hydrogenated hydrocarbon tackifying resin It is a hot-meltable blend product, The hot-melt processed blend is photocrosslinked. Crosslinked adhesive composition. [Claim 2] The crosslinking adhesive composition according to claim 1, wherein the crosslinking adhesive composition contains less than 50% by weight of a hydrogenated hydrocarbon tackifier. [Claim 3] The crosslinked adhesive composition according to claim 1, wherein the crosslinked adhesive composition comprises 10% to 40% by weight of a hydrogenated hydrocarbon tackifier. [Claim 4] The crosslinking adhesive composition according to claim 1, wherein the at least one alkyl (meth)acrylate monomer has an alkyl group containing 8 to 18 carbon atoms. [Claim 5] The crosslinking adhesive composition according to claim 1, wherein the reaction mixture contains 0.05 phr to 0.50 phr of a photocrosslinking agent. [Claim 6] The crosslinked adhesive composition according to claim 1, wherein the crosslinked adhesive composition further comprises particles of a thermoplastic polymer. [Claim 7] The crosslinked adhesive composition according to claim 6, wherein the hot-meltable blend comprises a packaging composition including a thermoplastic package surrounding the reaction mixture, and the particles of the thermoplastic polymer include residues of the packaging material. [Claim 8] A substrate including a first main surface and a second main surface, A crosslinked adhesive layer having a first main surface and a second main surface Adhesive articles containing, The first main surface of the adhesive layer is at least partially placed on the second main surface of the substrate. The aforementioned crosslinked adhesive layer A crosslinked (meth)acrylate copolymer that does not have polar groups, Hydrogenated hydrocarbon tackifying resin and The crosslinked adhesive composition comprises, and the crosslinked adhesive composition comprises, A alkyl (meth)acrylate monomer having 4 to 22 carbon atoms and an alkyl group that does not have a polar group or an aromatic moiety, At least one bifunctional (meth)acrylate monomer constituting 0.01 phr to 1.00 phr of the reaction mixture, At least one chain transfer agent constituting 0.05 phr to 0.50 phr of the reaction mixture, Copolymerizable photocrosslinking agent and (meth)acrylate copolymer containing the reaction product of a reaction mixture containing, and Hydrogenated hydrocarbon tackifying resin It is a hot-meltable blend product, The hot-melt processed blend is photocrosslinked. Adhesive products.

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