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WO2025191374A1 - Articles adhésifs comprenant une couche métallique - Google Patents

Articles adhésifs comprenant une couche métallique

Info

Publication number
WO2025191374A1
WO2025191374A1 PCT/IB2025/051838 IB2025051838W WO2025191374A1 WO 2025191374 A1 WO2025191374 A1 WO 2025191374A1 IB 2025051838 W IB2025051838 W IB 2025051838W WO 2025191374 A1 WO2025191374 A1 WO 2025191374A1
Authority
WO
WIPO (PCT)
Prior art keywords
adhesive
layer
metal layer
metal
adhesive article
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/IB2025/051838
Other languages
English (en)
Inventor
Audrey A. Sherman
Ramesh C. Lhila
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Solventum Intellectual Properties Co
Original Assignee
Solventum Intellectual Properties Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Solventum Intellectual Properties Co filed Critical Solventum Intellectual Properties Co
Publication of WO2025191374A1 publication Critical patent/WO2025191374A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/28—Metal sheet
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/29—Laminated material
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/304—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2400/00—Presence of inorganic and organic materials
    • C09J2400/10—Presence of inorganic materials
    • C09J2400/16—Metal
    • C09J2400/163—Metal in the substrate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2423/00—Presence of polyolefin
    • C09J2423/006—Presence of polyolefin in the substrate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2433/00—Presence of (meth)acrylic polymer
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2467/00—Presence of polyester
    • C09J2467/006—Presence of polyester in the substrate

Definitions

  • an adhesive article comprising an adhesive layer having a first major surface and an opposing second major surface and a release liner attached to the first major surface of the adhesive layer.
  • the adhesive article further comprises a metal layer attached to the second major surface of the adhesive layer, wherein the metal is aluminum or copper, and a polyethylene terephthalate (PET) layer attached to the metal layer opposite the adhesive layer.
  • PET polyethylene terephthalate
  • the adhesive article comprises a first adhesive layer having a first major surface and an opposing second major surface and a release liner attached to the first major surface of the first adhesive layer.
  • the adhesive article further comprises a metal layer attached to the second major surface of the first adhesive layer, wherein the metal is aluminum or copper.
  • the adhesive article comprises a backing layer attached to the metal layer opposite the first adhesive layer and a second adhesive layer attached to the backing layer opposite the metal layer.
  • FIG. 1A is a schematic cross-sectional view of an exemplary adhesive article
  • FIG. IB is a schematic cross-sectional view of another exemplary adhesive article
  • FIG. 2A is a schematic cross-sectional view of a further exemplary adhesive article
  • FIG. 2B is a schematic cross-sectional view of an additional exemplary adhesive article.
  • adheresive refers to polymeric compositions useful to adhere together two adherends.
  • adhesives are pressure sensitive adhesives.
  • Pressure sensitive adhesive compositions are well known to those of ordinary skill in the art to possess properties including the following: (1) aggressive and permanent tack, (2) adherence with no more than finger pressure, (3) sufficient ability to hold onto an adherend, and (4) sufficient cohesive strength to be cleanly removable from the adherend.
  • Materials that have been found to function well as pressure sensitive adhesives are polymers designed and formulated to exhibit the requisite viscoelastic properties resulting in a desired balance of tack, peel adhesion, and shear holding power. Obtaining the proper balance of properties is not a simple process.
  • (meth)acrylate refers to monomeric acrylic or methacrylic esters of alcohols. Acrylate and methacrylate monomers or oligomers are referred to collectively herein as "(meth)acrylates”. Materials referred to as “(meth)acrylate-based” are materials that contain one or more (meth) aery late and may contain additional co-polymerized free radically polymerizable materials.
  • free radically polymerizable and “ethylenically unsaturated” are used interchangeably and refer to a reactive group which contains a carbon-carbon double bond which is able to be polymerized via a free radical polymerization mechanism.
  • H2C CR 1 - C(O)-O-CH2-R a
  • R a group branched when used to describe an alkyl (meth)acrylate refers to the alkyl group, where the branching is not present at the carbon directly adjacent to the ester group
  • H2C CR 1 - C(O)-O-CH2-R a
  • R b and R c are each alkyl groups.
  • room temperature and “ambient temperature” are used interchangeably to mean temperatures in the range of 20°C to 25°C.
  • adjacent as used herein when referring to two layers means that the two layers are in proximity with one another with no intervening open space between them. They may be in direct contact with one another (e.g., laminated together) or there may be intervening layers.
  • polymer and “macromolecule” are used herein consistent with their common usage in chemistry. Polymers and macromolecules are composed of many repeated subunits. As used herein, the term “macromolecule” is used to describe a group attached to a monomer that has multiple repeating units. The term “polymer” is used to describe the resultant material formed from a polymerization reaction.
  • alkyl refers to a monovalent group that is a radical of an alkane, which is a saturated hydrocarbon.
  • the alkyl can be linear, branched, cyclic, or combinations thereof and typically has 1 to 20 carbon atoms. In some embodiments, the alkyl group contains 1 to 18, 1 to 12, 1 to 10, 1 to 8, 1 to 6, or 1 to 4 carbon atoms.
  • alkyl groups include, but are not limited to, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, n-pentyl, n-hexyl, cyclohexyl, n-heptyl, n-octyl, ethylhexyl, n-dodecyl, 2-dodecyl, 3 -dodecyl, 4-dodecyl, and 5- dodecyl.
  • metal includes a pure metal or a metal alloy.
  • film or “layer” refers to a single stratum within a multilayer article.
  • thickness refers to the smallest dimension of a film or layer, e.g., in a z- axis while a major surface of the film or layer is in the x- and y-axes.
  • substrate encompasses films and layers, including microstructured films/layers.
  • microstructures refer to engineered elements having at least two feature dimensions that are microscopic, namely 1 micrometer to less than 1000 micrometers.
  • engineered with respect to microstructures refers to surface features that were created from a specific design with deterministic position, size, shape, spacing, and dimensions, as opposed to any surface roughness features inherently present on a substrate.
  • the term “essentially free” in the context of a composition being essentially free of a component refers to a composition containing less than 1% by weight (wt.%), 0.5 wt.% or less, 0.25 wt.% or less, 0.1 wt.% or less, 0.05 wt.% or less, 0.001 wt.% or less, or 0.0001 wt.% or less of the component, based on the total weight of the composition.
  • the term “generally”, unless otherwise specifically defined, means that the property or attribute would be readily recognizable by a person of ordinary skill but without requiring absolute precision or a perfect match (e.g., within +/- 20 % for quantifiable properties).
  • the term “substantially”, unless otherwise specifically defined, means to a high degree of approximation (e.g., within +/- 10% for quantifiable properties) but again without requiring absolute precision or a perfect match. Terms such as same, equal, uniform, constant, strictly, and the like, are understood to be within the usual tolerances or measuring error applicable to the particular circumstance rather than requiring absolute precision or a perfect match.
  • Medical adhesives can remain adhered to a wearer for a long period of time without damaging the wearer’s skin.
  • components that undesirably migrate or bloom to the surface of a medical adhesive that is in contact with skin such as tackifiers, plasticizers, antioxidants, etc.
  • a thin metal layer of aluminum or copper is capable of providing a barrier against such components.
  • use of such a metal layer allows for greater design freedom of the adhesive article as well as of any medical device attached to the adhesive article (e.g., additives in a device adhesive).
  • an adhesive article is provided.
  • the adhesive article comprises: an adhesive layer having a first major surface and an opposing second major surface; a release liner attached to the first major surface of the adhesive layer; a metal layer attached to the second major surface of the adhesive layer, wherein the metal is aluminum or copper; and a polyethylene terephthalate (PET) layer attached to the metal layer opposite the adhesive layer.
  • an adhesive layer having a first major surface and an opposing second major surface
  • a release liner attached to the first major surface of the adhesive layer
  • a metal layer attached to the second major surface of the adhesive layer, wherein the metal is aluminum or copper
  • PET polyethylene terephthalate
  • an adhesive article 100a includes an adhesive layer 110 having a first major surface 112 and an opposing second major surface 114.
  • a release liner 120 is attached to the first major surface 112 of the adhesive layer 110.
  • a metal layer 130 is attached to the second major surface 114 of the adhesive layer 110.
  • the metal is aluminum or copper. It is noted that the metal layer 130 has a first major surface 132 and a second major surface 134.
  • the adhesive article 100a further includes a polyethylene terephthalate layer 140 attached to the metal layer 130 (e.g., the second major surface 134 of the metal layer 130) opposite the adhesive layer 110.
  • the adhesive layer 110 is directly adjacent to each of the release liner 120 and the metal layer 130, and the polyethylene terephthalate layer 140 is directly adjacent to the metal layer 130.
  • an adhesive article 100b comprises each of the layers of the adhesive article 100a of FIG. 1A, plus further optional layers.
  • the adhesive article 100b depicted in FIG. IB includes a first adhesive layer 110 having a first major surface 112 and an opposing second major surface 114.
  • a release liner 120 is attached to the first major surface 112 of the adhesive layer 110.
  • a first metal layer 130 is attached to the second major surface 114 of the adhesive layer 110.
  • the metal is aluminum or copper.
  • the first metal layer 130 has a first major surface 132 and a second major surface 134.
  • the adhesive article 100b further includes a polyethylene terephthalate layer 140 attached to the metal layer 130 (e.g., the second major surface 134 of the metal layer 130) opposite the adhesive layer 110.
  • the polyethylene terephthalate layer 140 has a first major surface 142 and a second major surface 144. As shown, the polyethylene terephthalate layer 140 is attached to the second major surface 134 of the metal layer 130 via an optional layer of laminating adhesive 160 disposed between the first metal layer 130 and the PET layer 140.
  • the laminating adhesive 160 has a first major surface 162 and a second major surface 164.
  • the adhesive article 100b fiirther includes an optional second metal layer 170 attached to the PET layer 140 (e.g., the second major surface 144 of the PET layer 140) opposite the first metal layer 130, wherein the metal of the second metal layer 170 is aluminum or copper.
  • the second metal layer has a first major surface 172 and a second major surface 174.
  • an optional second adhesive layer 150 is atached to the second major surface 174 of the second metal layer 170 opposite the PET layer 140.
  • at least one of the first adhesive layer 110 or the second adhesive layer 150 comprises a pressure sensitive adhesive (PSA).
  • PSA pressure sensitive adhesive
  • the adhesive article 100b further includes an optional layer of laminating adhesive 180 disposed between the second metal layer 170 and the PET layer 140. As shown, the second metal layer 170 is atached to the second major surface 144 of the PET layer 140 via the optional layer of laminating adhesive 180.
  • the layer of laminating adhesive 180 has a first major surface 182 and a second major surface 184.
  • an adhesive article comprises: a first adhesive layer having a first major surface and an opposing second major surface; a release liner atached to the first major surface of the first adhesive layer; a metal layer atached to the second major surface of the first adhesive layer, wherein the metal is aluminum or copper; a backing layer atached to the metal layer opposite the first adhesive layer; and a second adhesive layer atached to the backing layer opposite the metal layer.
  • an adhesive article 200a includes a first adhesive layer 210 having a first major surface 212 and an opposing second major surface 214 and a release liner 220 atached to the first major surface 212 of the first adhesive layer 210.
  • the adhesive article 200a further includes a metal layer 230 atached to the second major surface 214 of the first adhesive layer 210, wherein the metal is aluminum or copper.
  • the first metal layer 230 has a first major surface 232 and a second major surface 234.
  • a backing layer 240 is atached to (e.g., the second major surface 234 of) the metal layer 230 opposite the first adhesive layer 210, and a second adhesive layer 250 is attached to the backing layer 240 opposite the metal layer 230.
  • the backing layer 240 has a first major surface 242 and a second major surface 244.
  • the first adhesive layer 210 is directly adjacent to each of the release liner 220 and the metal layer 230
  • the backing layer 240 is directly adjacent to each of the metal layer 230 and the second adhesive layer 250.
  • an adhesive article 200b comprises each of the layers of the adhesive article 200a of FIG. 2A, plus further optional layers.
  • the adhesive article 200b depicted in FIG. 2B includes a first adhesive layer 210 having a first major surface 212 and an opposing second major surface 214 and a release liner 220 atached to the first major surface 212 of the first adhesive layer 210.
  • the adhesive article 200a further includes a (e.g., first) metal layer 230 atached to the second major surface 214 of the first adhesive layer 210, wherein the metal is aluminum or copper.
  • a backing layer 240 is attached to the metal layer 230 (e.g., the second major surface 234 of the metal layer 230) opposite the first adhesive layer 210
  • a second adhesive layer 250 is attached to the backing layer 240 (e.g., the second major surface 244 of the backing layer 240) opposite the metal layer 230.
  • the second adhesive layer 250 has a first major surface 252 and a second major surface 254. Often, at least one of the first adhesive layer 210 or the second adhesive layer 250 comprises a PSA.
  • K metal layer comprises aluminum or copper.
  • a metal layer may comprise an aluminum alloy or a copper alloy.
  • the metal layer consists of aluminum or copper.
  • the metal layer is a layer of aluminum while in other cases, the metal layer is a layer of copper.
  • the metal layer consists of an aluminum alloy or a copper alloy.
  • the metal layer may be a layer of an aluminum alloy while in other cases, the metal layer may be a layer of a copper alloy.
  • the metal of at least one of the first metal layer or the second metal layer comprises or consists of aluminum. In some embodiments, the metal of at least one of the first metal layer or the second metal layer comprises or consists of copper. When copper is used, advantageously the metal layer provides antimicrobial activity as well as barrier properties.
  • a thickness of the metal layer is typically 1 micrometer or greater, 2 micrometers, 3 micrometers, 4 micrometers, 5 micrometers, 6 micrometers, 7 micrometers, 8 micrometers, 9 micrometers, 10 micrometers, 11 micrometers, 12 micrometers, 13 micrometers, 14 micrometers, 15 micrometers, 16 micrometers, 17 micrometers, 18 micrometers, 19 micrometers, or 20 micrometers or greater; and 25 micrometers or less, 24 micrometers, 23 micrometers, 22 micrometers, 21 micrometers, 20 micrometers, 19 micrometers, 18 micrometers, 17 micrometers,
  • Thickness may be determined using a micrometer gauge or doing a microscopic analysis of a cross-sectional sample of a layer or article.
  • the metal layer can typically be prepared by evaporation, reactive evaporation, sputtering, reactive sputtering, chemical vapor deposition, plasma enhanced chemical vapor deposition, electro-plating, spray painting, vacuum deposition, or atomic layer deposition.
  • Preferred methods include vacuum preparations such as sputtering and evaporation. For instance, in some cases one of two forms of physical vapor deposition (PVD) are used: evaporation or sputtering. Evaporated coatings rely upon heating the coating material (evaporant) to a temperature at which it evaporates. This is followed by condensation of the vapor upon a substrate. For evaporated coatings, the electron-beam deposition process is most commonly used.
  • a metal foil can also be attached to a backing layer (e.g., PET) using a laminating adhesive.
  • Adhesive Layer e.g., PET
  • Suitable adhesives for the adhesive layer include pressure-sensitive adhesives and hot melt adhesives.
  • the adhesive layer comprises a pressure -sensitive adhesive.
  • Suitable pressure sensitive adhesives comprise, for instance, a (meth)acrylate-based polymer and may comprise optional additives such as tackifying resins.
  • the (meth)acrylate-based polymer is prepared by polymerizing a reaction mixture.
  • hot melt processable is not a process description or limitation, but rather is a material description, meaning that the adhesive compositions are capable of being hot melt processed, and not that the compositions necessarily have been hot melt processed.
  • a suitable (meth)acrylate-based polymer comprises a cured reaction product of a mixture comprising:
  • a reaction mixture is prepared with the desired composition reactive components and is then polymerized to form the (meth)acrylate-based polymer.
  • the reaction mixture comprises at least a first (meth)acrylate monomer, a non-acid-functional, ethylenically unsaturated polar monomer, optionally may contain an acid-functional ethylenically unsatured monomer, a crosslinking moiety, and at least one initiator.
  • the reactive mixture may comprise one or more optional components as is described below.
  • the first (meth)acrylate monomer comprises a branched (meth)acrylate with a total of 10- 17 carbon atoms or a mixture of secondary alkyl (meth)acrylate isomers with a total of 8-18 carbon atoms.
  • the first (meth)acrylate monomer comprises a branched alkyl (meth)acrylate, with 10-17 carbon atoms.
  • Particularly suitable is iso-decyl acrylate.
  • the first (meth)acrylate monomer comprises a mixture of secondary alkyl (meth)acrylate isomers with a total of 8-18 carbon atoms.
  • the mixture of secondary alkyl (meth)acrylate isomers comprises a mixture at least 5 isomers.
  • the first (meth)acrylate comprises a mixture of secondary alkyl (meth)acrylate isomers of Formula (I): where R 1 and R 2 are each independently a Ci to Cio saturated linear alkyl group, the sum of the number of carbons in R 1 and R 2 is 8 to 18; and R 3 is H or CH3.
  • R 1 and R 2 are each independently a Ci to Cio saturated linear alkyl and the sum of the number of carbons in R 1 and R 2 is 9 to 17. In other embodiments, R 1 and R 2 are each independently a Ci to Cio saturated linear alkyl and the sum of the number of carbons in R 1 and R 2 is 9 to 13.
  • the mixtures of monomers have been described in, for example US Patent No. 9,102,774 (Clapper et al.).
  • the first (meth)acrylate monomer or mixture of monomers is the primary component of the reaction mixture comprising at least 89% by weight based on the weight of the total reactive monomers, and up to 99.49% by weight. In some embodiments, the first (meth)acrylate is present in an amount of at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, or 99%.
  • composition used to form the pressure-sensitive adhesive polymer may further include a polar monomer.
  • polar monomer is exclusive of acid-functionality and is referred to as a “non-acid-functional, ethylenically unsaturated polar monomer”.
  • Suitable such polar monomers include, but are not limited to, 2 -hydroxy ethyl (meth)acrylate; 4-hydroxybutyl (meth)acrylate; N-vinylpyrrolidone (NVP); N- vinylcaprolactam (NVC); acrylamide; mono- or di-N-alkyl substituted acrylamide; t-butyl acrylamide; dimethylaminoethyl acrylamide; N-octyl acrylamide; a poly(alkoxyalkyl) (meth)acrylate including 2-(2-ethoxyethoxy)ethyl (meth)acrylate, 2-ethoxyethyl (meth)acrylate, 2- methoxyethoxyethyl (meth)acrylate, 2 -methoxy ethyl methacrylate, and a polyethylene glycol mono(meth)acrylate; an alkyl vinyl ether, including vinyl methyl ether; and mixtures thereof.
  • Particularly suitable polar monomers include those selected from the group consisting of NVP (N- vinyl pyrrolidone), NVC (N-vinylcaprolactam), acrylamide mono- or di-N-alkyl substituted acrylamide, t-butyl acrylamide, dimethylaminoethyl acrylamide or N-octyl acrylamide, and mixtures thereof.
  • NVP N- vinyl pyrrolidone
  • NVC N-vinylcaprolactam
  • acrylamide mono- or di-N-alkyl substituted acrylamide t-butyl acrylamide
  • dimethylaminoethyl acrylamide or N-octyl acrylamide and mixtures thereof.
  • the non-acid-functional, ethylenically unsaturated polar monomer is present in an amount of at least 0.5 and up 5% by weight, based on the total weight of monomers. In some embodiments, the non-acid-functional, ethylenically unsaturated polar monomer is present in an amount of at least 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, or 4.5% by weight.
  • the reaction mixture may optionally include an acid-functional monomer, wherein the acid-functional group may be an acid per se, such as a carboxylic acid, or a portion may be salt thereof, such as an alkali metal carboxylate.
  • Useful acid-functional monomers include, but are not limited to, those selected from an ethylenically unsaturated carboxylic acid, ethylenically unsaturated sulfonic acid, ethylenically unsaturated phosphonic acid, and mixtures thereof.
  • examples of such compounds include those selected from acrylic acid, methacrylic acid, itaconic acid, fumaric acid, crotonic acid, citraconic acid, maleic acid, oleic acid, P-carboxyethyl (meth)acrylate, 2-sulfoethyl methacrylate, styrene sulfonic acid, 2-acrylamido-2- methylpropanesulfonic acid, vinylphosphonic acid, and mixtures thereof.
  • the acid monomer if present, is up to 1% by weight based on the total weight of monomers. In some embodiments, the acid-functional monomer is present in an amount of up to 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9% by weight.
  • the reaction mixture also comprises at least one crosslinking moiety.
  • crosslinking moieties are suitable.
  • the crosslinking moiety is a photocrosslinker.
  • the crosslinking moiety is a multi-functional (meth)acrylate.
  • the crosslinking moiety is a combination of photocrosslinker and multi-functional (meth)acrylate.
  • Photocrosslinkers are co-polymerizable, having a free radically polymerizable group to copolymerize with the monomers described above.
  • the co-polymerizable photocrosslinkers also contain a photosensitive group that upon exposure to the right wavelength of light, typically high intensity ultra-violet (UV) radiation, the photosensitive group forms free radicals which can form crosslinks in the polymer. If the (meth)acrylate-based polymer is formed by the use of a photoinitiator, the photocrosslinker is not activated by the same wavelengths of light as the photoinitiator.
  • the co-polymerizable photocrosslinker is incorporated into the polymer, and is able to be thermally processed, as the crosslinker is thermally stable and remains intact until activated by the proper wavelength of light. This permits the co-polymerizable photocrosslinker from becoming activated until the polymer has been hot melt coated.
  • these crosslinkers are activated by UV light generated from artificial sources such as medium pressure mercury lamps or a UV blacklight.
  • Suitable photocrosslinkers in the mono-ethylenically unsaturated aromatic ketone coOmonomers that are free of ortho-aromatic hydroxyl groups such as those described in US Patent No. 4,737,559 (Kellen et al.).
  • Specific examples include para-acryloxybenzophenone (ABP), para- acrylyoxyethoxybenzophenone, para-N-(methylacryloxyethyl)-carbamoylethoxybenzophenone, para-acryloxyacetophenone, ortho-acrylamidoacetophenone, acrylated anthraquinones, and the like.
  • ABP para-acryloxybenzophenone also called 4-acryloxybenzophenone.
  • the other suitable class of crosslinking moieties are multi-functional (meth)acrylates.
  • a useful multi-functional (meth) acrylates include, but are not limited to, a di(meth)acrylate, tri(meth)acrylate, and tetra(meth)acrylate, such as 1,6-hexanediol di(meth)acrylate, a polyethylene glycol) di(meth)acrylate, polybutadiene di(meth)acrylate, a polyurethane di(meth)acrylate, propoxylated glycerin tri(meth)acrylate, and mixtures thereof.
  • the multi-functional (meth)acrylates crosslink the (meth)acrylate polymer during the polymerization process.
  • the crosslinking moiety whether a photocrosslinker, a multi-functional (meth)acrylate, or combination thereof is present in an amount of at least 0.01% and up to 5% by weight based on the total weight of the total monomers. In some embodiments, the crosslinking moiety is present in an amount at least 0.1, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, or 4.5% by weight.
  • the reaction mixture also comprises at least one initiator.
  • the initiator is a photoinitiator, meaning that the initiator is activated by light, typically ultraviolet (UV) light.
  • Photoinitiators are well understood by one of skill in the art of (meth)acrylate polymerization. Examples of suitable free radical photoinitiators include DAROCURE 1173, DAROCURE 4265, IRGACURE 184, IRGACURE 651, IRGACURE 1173, IRGACURE 819, LUCIRIN TPO, LUCIRIN TPO-L, commercially available from BASF, Charlotte, NC.
  • the photoinitiator DAROCURE 1173 is particularly suitable.
  • the photoinitiator is used in amounts of 0.01 to 1 part by weight, more typically 0.1 to 0.5 parts by weight relative to 100 parts by weight of total reactive components.
  • the reaction mixture may also comprise a variety of optional additives as long as the additives do not adversely affect the polymerization reaction.
  • One particularly suitable additive is a chain transfer agent.
  • useful chain transfer agents include, but are not limited to, those selected from the group consisting of carbon tetrabromide, mercaptans, alcohols, and mixtures thereof.
  • a particularly suitable chain transfer agent is IOTG (isooctyl thioglycolate). Chain transfer agents and the use of chain transfer agents is well understood in the adhesive arts.
  • reaction mixtures are polymerized to form the (meth)acry late-based polymer.
  • Pressure sensitive adhesive layers may comprise this (meth)acrylate-based polymer and may also comprise additional additives as are described below.
  • the polymerization of the reaction mixture can be carried out using a variety of conventional free radical polymerization methods, including solvent-based and solventless processes.
  • Solventless polymerization methods may also be utilized to prepare the polymers, such as the continuous free radical polymerization method described in U.S. Pat. Nos. 4,619,979 (Kotnour et al.) and 4,843,134 (Kotnour et al.), the essentially adiabatic polymerization methods using a batch reactor described in U.S. Pat. No. 5,637,646 (Ellis), and, the methods described for polymerizing packaged pre-adhesive compositions described in U.S. Pat. No. 5,804,610 (Hamer et al.).
  • Suitable additives include tackifiers, plasticizers, dyes, antioxidants, and UV stabilizers as long as the additives do not adversely affect the adhesive properties of the adhesive layer.
  • Tackifying resins are particularly suitable for use in pressure sensitive adhesive layers.
  • Suitable tackifying resins include rosins and their derivatives (e.g., rosin esters); polyterpenes and aromatic-modified polyterpene resins; coumarone-indene resins; and hydrocarbon resins such as alpha pinene-based resins, beta pinene-based resins, limonene-based resins, aliphatic hydrocarbonbased resins, aromatic-modified hydrocarbon-based resins, aromatic hydrocarbon resins, and dicyclopentadiene-based resins.
  • the tackifier is a terpene resin, a hydrocarbon resin, a rosin resin, a petroleum resin, or combination thereof.
  • Combinations of various tackifiers can be used if desired. These tackifying resins, if desired, can be hydrogenated to lower their color contribution to the pressure-sensitive adhesive layer.
  • the tackifying resin, if used, is typically present in the pressure sensitive adhesive layer in an amount of 2 -25 parts of tackifier per 100 parts of the (meth)acry late-based polymer.
  • a hot melt processable adhesive is present within a packaging material.
  • Hot melt processable packaged adhesive compositions may be formed by surrounding the reaction mixture components described above in a package comprising a thermoplastic material and polymerizing the reactive components within the package. The package can then be added to an extruder, additional optional components can be added if desired, and the adhesive composition hot melt coated onto the surface of the substrate.
  • the hot melt processable pressure sensitive adhesive layer is photocrosslinked, by subjecting the adhesive layer to a photocrosslinking process.
  • the photosensitive crosslinker is activated by exposure to high intensity UV lamps to effect crosslinking. Examples of suitable UV lamps include medium pressure mercury lamps.
  • the thickness of the photocrosslinked adhesive layer can vary depending upon a number of factors such as the desired use of the adhesive article, whether the adhesive layer contains sublayers, and the like. Typically, the thickness of an adhesive layer may be in the range from about 0.05 micrometers to about 200 micrometers or 50 micrometers to 100 micrometers. When there are two adhesive layers, the thickness of each is independently selected, thus may be the same or different.
  • thermal free radical generators capable of hydrogen abstraction are suitable.
  • the thermal free radical generators include materials that are available as thermal free radical initiators. While not wishing to be bound by theory, it is believed that the free radical generators, upon activation forms free radicals and that these free radicals are able to extract hydrogen atoms from the (meth)acrylate copolymeric matrix to generate free radicals on the (methjacrylate copolymeric matrix. The free radicals generated on the (meth)acrylate copolymeric matrix can form additional crosslinks between copolymers in the matrix.
  • a particularly suitable class of thermal free radical generators capable of hydrogen abstraction are organic peroxides such as alkyl and aryl peroxides.
  • the organic peroxide is activated at elevated temperatures, such as benzoyl peroxide.
  • Other initiators include tert-butyl peroxide, tert-butyl hydroperoxide, tert-butyl peroxy benzoate, tert-butyl peroxy- 2 -ethylhexanoate or perketals such as l,l-di(tert-butylperoxy)cyclohexane, commercially available from PERGAN, The Peroxide Company.
  • a lower activation temperature such as 60°C or 80°C
  • more active initiators such as the di-(4-tert.-butylcyclohexyl)-peroxy dicarbonate and Methylisobutylketoneperoxide initiators commercially available from PERGAN, The Peroxide Company, can be used.
  • benzoyl peroxide is a particularly suitable thermal free radical generator.
  • a wide range of acid-reactive compounds are suitable for use in high temperature sealing agents.
  • Particularly suitable acid-reactive compounds are epoxy-functional compounds and multifunctional compounds comprising epoxy-functionality.
  • the acid-reactive compound is an epoxy functional silane.
  • Epoxy -functional silanes are often referred to as coupling agents as they have one type of functionality at one terminus (epoxy) and a different functionality at the other terminus (silane) and are used to couple different types of polymers and materials.
  • a number of epoxy-functional silanes are suitable such as (3-glycidyloxypropyl)trimethoxy silane, (3 -glycidyloxypropyl)methyldi ethoxy silane, 2-(3,4-epoxycyclohexyl)ethyltriethoxy silane, and 2- (3,4-epoxycyclohexyl)ethyltrimethoxysilane commercially available from Gelest.
  • (3-glycidyloxypropyl)trimethoxysilane is particularly suitable.
  • a heat debondable adhesive may be used to increase sustainability of a medical device by increasing the ease of separating an adhesive article from a medical device following use so that components of the medical device may be more readily recycled.
  • a head debondable adhesive would be located on the device side of an adhesive article (e.g., opposite a side that would be in contact with a user’s skin).
  • a suitable heat debondable adhesive preferably comprises a shape-memory polymer sheet having two opposing surfaces and first and second adhesive materials being provided on the two opposing surfaces of the polymer sheet. The first and second adhesive materials may be identical or different from one another.
  • the shape-memory polymer sheet has a strained temporary shape and an intrinsic shape, wherein the shape-memory polymer sheet, if heated to or above a transition temperature range, at least partially converts from its strained temporary shape to its intrinsic shape.
  • the shape-memory polymer sheet may comprise a plurality of slits.
  • the heat debondable adhesive tape is a heat debondable adhesive article as described in detail in WO 2013/012973 (Rule et al.), which is herewith incorporated by reference in its entirety.
  • substrates are suitable for the backing layer of adhesive articles of this disclosure.
  • the substrates are ones that are useful in medical applications.
  • suitable substrates for the backing layer include a polymeric film, a tape backing, or a medical device.
  • the substrate may be a monolithic construction or a multi-layer construction. In the multi-layer constructions, the substrate may have a variety or coatings or layers present either adjacent to or as the first or second surface of the substrate.
  • the film material is rigid enough to provide support to the adhesive article.
  • Suitable film layers include those that when applied to an anatomical surface, are able to conform to the surface even when the surface is moved and can stretch and retract.
  • the film material is an elastomeric polyolefin (e.g., polyethylene, a polypropylene, or combinations thereof), a polyurethane, a polyester (e.g., polyethylene terephthalate (PET)), or a polyether block amide film.
  • PET polyethylene terephthalate
  • the backing comprises or consists of a PET film.
  • the substrate is a tape backing.
  • suitable tape backings include breathable conformable backings.
  • a wide range of breathable conformable backings are suitable for use as the backing layer in articles of this disclosure.
  • a breathable conformable backing comprises a woven or knit textile, a nonwoven, a foam, or a plastic.
  • a breathable conformable backing comprises a high moisture vapor permeable film backing. Examples of such backings, methods of making such films, and methods for testing their permeability are described, for example, in US Patent Nos. 3,645,835 (Hodgson) and 4,595,001 (Potter et al.). Typically, such backings are porous materials.
  • the backing layer is conformable to anatomical surfaces. As such, when the backing layer is applied to an anatomical surface, it conforms to the surface even when the surface is moved. Generally, the backing layer is also conformable to animal anatomical joints. When the joint is flexed and then returned to its unflexed position, the backing stretches to accommodate the flexion of the joint, but is resilient enough to continue to conform to the joint when the joint is returned to its unflexed condition.
  • backing layers examples include elastomeric polyurethane, polyester, or polyether block amide films. These films have a combination of desirable properties including resiliency, high moisture vapor permeability, and transparency.
  • a backing layer includes a microstructured surface.
  • Any backing layer used in an adhesive article according to the present disclosure may comprise a microstructured surface.
  • the microstructured surface will be in contact with at least one other layer of the adhesive article.
  • FIG. 3 a schematic cross-sectional view is provided of an exemplary adhesive article 300 according to the first aspect, in which the PET layer has a surface comprising microstructures.
  • the adhesive article 300 includes an adhesive layer 310 having a first major surface 312 and an opposing second major surface 314.
  • a release liner 320 is attached to the first major surface 312 of the adhesive layer 310.
  • a metal layer 330 is attached to the second major surface 314 of the adhesive layer 310.
  • the metal layer 330 has a first major surface 332 and a second major surface 334.
  • the adhesive article 300 further includes a polyethylene terephthalate layer 340 attached to the metal layer 330 (e.g., the second major surface 334 of the metal layer 330) opposite the adhesive layer 310.
  • the PET layer 340 has a microstructured surface 345 that comprises adjacent peaks 341 and valleys 343, forming a series of prisms across the surface 345.
  • the metal layer 330 is conformal to the peaks 341 and valleys 343 of the PET layer 340 of the embodiment depicted in FIG. 3.
  • the adhesive layer 310 will be sufficiently thick to fill in any remaining microstructured shapes and provide a substantially planar opposing (e.g., second major) surface 312. Further details regarding microstructured substrates having such peak structure arrays and how to form them are described in US 2021/0187819 (Connell et al.), incorporated herein by reference. Prisms are just one example of suitable microstructures for inclusion on a microstructured surface of a backing layer.
  • Microstructured films/layers are well known in the art and can include for instance and without limitation, louver structures (see, e.g., WO 2019/118685 (Schmidt et al.) and WO 2020/026139 (Schmidt et al.), each incorporated herein by reference); facet structures (see, e.g., WO 2020/250180 (Kenney et al.), incorporated herein by reference); and projection array structures (see, e.g., WO 2020/097319 (Wolk et al.), incorporated herein by reference).
  • the thickness of a backing layer may be 6 micrometers or greater, 8 micrometers, 10 micrometers, 12 micrometers, 15 micrometers, 17 micrometers, 20 micrometers, 22 micrometers, 25 micrometers, 27 micrometers, 30 micrometers, 32 micrometers, 35 micrometers, 37 micrometers, or 40 micrometers or greater; and 50 micrometers or less, 45 micrometers, 40 micrometers, 35 micrometers, 30 micrometers, 25 micrometers, 20 micrometers, 15 micrometers, or 10 micrometers or less.
  • a backing layer has a thickness of 6 micrometers to 50 micrometers. Thickness may be determined using a micrometer gauge or doing a microscopic analysis of a cross-sectional sample of a layer or article. Release Liners
  • Release liners are sheet materials that have a low adhesion coating on at least one surface.
  • the adhesives of the present disclosure can be disposed on a release liner to generate an article comprising a layer of adhesive on a release liner.
  • This adhesive/release liner article can be used to prepare other adhesive/substrate articles by laminating the adhesive layer to different substrate and then removing the release liner. This may be advantageous by permitting a hot melt processable adhesive to be disposed onto substrates to which it is difficult to directly dispose a hot melt processable pressure sensitive adhesive, such as substrates that are thermally sensitive.
  • the adhesive/release liner article may also be used to apply the adhesive layer to an article such as, for example, an electrode, an ostomy device, or the like.
  • Suitable release liners may comprise flexible paper and polymeric films having sufficient dimensional stability to hold layers and structures formed thereon in position relative to one another without excessive stretching.
  • Suitable paper liners include, but are not limited to, densified Kraft paper (commercially available from, for example, Loparex North America, Willowbrook, IL), poly -coated paper such as polyethylene coated Kraft paper, and the like.
  • Suitable polymeric film/liners include, but are not limited to, thermoplastic polymer films including polyalkylenes, e.g., polyethylene and polypropylene; polybutadiene, polyisoprene; polyalkylene oxides, e.g., polyethylene oxide; polyesters, e.g., PET and PBT; polyamides; polycarbonates, polystyrenes, block copolymers of any of the proceeding polymers, and combinations thereof.
  • Other suitable polymeric materials include polyimide, polysilicone, polytetrafluoroethylene, polyethylenephthalate, polyvinylchloride, or combinations thereof. Polymer blends of any of the above may also be employed, and nonwoven or woven liners may also be used.
  • any or all of the major surfaces of the release liners may include a release coating, which may be the same or different, to tune or otherwise modify their release values.
  • the release coatings applied to the major surfaces of the release liners may be selected from a fluorine -containing material, a silicone-containing material, a fluoropolymer, a silicone polymer, or a poly (meth)acry late ester derived from a monomer including an alkyl (meth)acrylate having an alkyl group with 12 to 30 carbon atoms.
  • the alkyl group on the alkyl (meth)acrylate can be branched.
  • Suitable laminating adhesives can include a wide variety of adhesives known in the art. Suitable adhesives may be selected from any adhesive that can be applied on a layer and can adequately adhere to a wide variety of target substrates, e.g., metal layers, backing layers, adhesive layers, etc. Often, suitable adhesives include polyurethanes (including aliphatic or aromatic urethanes), urethane acrylic copolymers, polyesters, acrylate polymers, acrylic polymers, polyvinyl acetate copolymers, polyvinyl alcohol copolymers, vinyl acetate ethylene copolymers, urea formaldehydes, and casein and resorcinol.
  • polyurethanes including aliphatic or aromatic urethanes
  • urethane acrylic copolymers include polyurethanes (including aliphatic or aromatic urethanes), urethane acrylic copolymers, polyesters, acrylate polymers, acrylic polymers, polyvinyl acetate copo
  • a laminating adhesive may be applied in a form of an emulsion, a solution, or a hot melt, for instance.
  • the laminating adhesive may be cured using UV irradiation or electron beam irradiation.
  • Suitable laminating adhesives include many that are commercially available from Ashland Inc. (Covington, KY) and Cattie Adhesives (Quakertown, PA).
  • laminating adhesives include silicone thermoplastic elastomers, including, but not limited to poiydiorganosiloxane polyoxamide, linear block copolymers, i.e., silicone polyoxamide, such as those disclosed in U.S. Pat. Nos. 7,371,464 (Sherman, et. al.) and 7,501,184 (Leir, et, al.), which are each incorporated herein by reference in their entirety.
  • the molecular weight of the thermoplastic elastomers is not particularly limited, and in some embodiments the number average molecular weight of the thermoplastic elastomers is between about 2000 g/mol and 1,200,000 g/mol, between about 2000 g/mol and 750,000 g/mol, between about 2000 g/mol and 500,000 g/mol or even between about 2000 g/mol and 250,000 g/mol.
  • the thickness of a laminating adhesive layer may be independently selected from a thickness of 1 micrometer or greater, 2 micrometers, 3 micrometers, 4 micrometers, 5 micrometers, 6 micrometers, 7 micrometers, or 8 micrometers or greater; and 12 micrometers or less, 11 micrometers, 10 micrometers, 9 micrometers, 8 micrometers, 7 micrometers, 6 micrometers, 5 micrometers, or 4 micrometers or less. Thickness may be determined using a micrometer gauge or doing a microscopic analysis of a cross-sectional sample of a layer or article.
  • the present disclosure provides an adhesive article.
  • the adhesive article comprises an adhesive layer having a first major surface and an opposing second major surface, and a release liner attached to the first major surface of the adhesive layer.
  • the adhesive article further comprises a metal layer attached to the second major surface of the adhesive layer, wherein the metal is aluminum or copper, and a polyethylene terephthalate (PET) layer attached to the metal layer opposite the adhesive layer.
  • PET polyethylene terephthalate
  • the present disclosure provides an adhesive article according to the first embodiment, further comprising a layer of laminating adhesive disposed between the metal layer and the PET layer.
  • the present disclosure provides an adhesive article according to the first embodiment or the second embodiment, wherein the metal layer is a first metal layer and wherein the adhesive article further comprises a second metal layer attached to the PET layer opposite the first metal layer, wherein the metal of the second metal layer is aluminum or copper.
  • the present disclosure provides an adhesive article according to the third embodiment, wherein the adhesive layer is a first adhesive layer and wherein the adhesive article further comprises a second adhesive layer attached to the second metal layer opposite the PET layer.
  • the present disclosure provides an adhesive article according to the fourth embodiment, wherein each of the first adhesive layer and the second adhesive layer independently has a thickness between 50 micrometers to 100 micrometers.
  • the present disclosure provides an adhesive article according to the fourth embodiment or the fifth embodiment, wherein at least one of the first adhesive layer or the second adhesive layer comprises a pressure sensitive adhesive (PSA).
  • PSA pressure sensitive adhesive
  • the present disclosure provides an adhesive article according to the sixth embodiment, wherein the PSA comprises a hot melt processable pressure sensitive adhesive comprising a (meth)acry late-based polymer comprising the cured reaction product of a mixture comprising: a) 89.0 - 99.49% by weight of at least one fust (meth)acrylate monomer; b) 0.5 - 5.0% by weight of a non-acid-functional, ethylenically unsaturated polar monomer; c) 0 - 1% by weight of an acid-functional ethylenically unsaturated monomer; d) 0.01 - 5% by weight of at least one crosslinking moiety; and e) 0.01 - 1.0 parts by weight of at least one initiator based upon the total weight of curable components, wherein the first (meth)acrylate monomer comprises a branched (meth)acrylate with a total of 10-17 carbon atoms or a mixture of secondary alkyl
  • the present disclosure provides an adhesive article according to the fourth embodiment or the fifth embodiment, wherein the second adhesive layer is a heat bondable adhesive.
  • the present disclosure provides an adhesive article according to any of the third through eighth embodiments, further comprising a layer of laminating adhesive disposed between the second metal layer and the PET layer.
  • the present disclosure provides an adhesive article according to any of the third through ninth embodiments, wherein the metal of at least one of the first metal layer or the second metal layer is aluminum.
  • the present disclosure provides an adhesive article according to any of the third through ninth embodiments, wherein the metal of at least one of the first metal layer or the second metal layer is copper.
  • the present disclosure provides an adhesive article according to any of the third through eleventh embodiments, wherein each of the first metal layer and the second metal layer independently has a thickness between 1 micrometer to 25 micrometers.
  • the present disclosure provides an adhesive article according to any of the first through twelfth embodiments, wherein the adhesive layer comprises a patterned layer.
  • the present disclosure provides another adhesive article.
  • the adhesive article comprises a first adhesive layer having a first major surface and an opposing second major surface and a release liner attached to the first major surface of the first adhesive layer.
  • the adhesive article further comprises a metal layer attached to the second major surface of the first adhesive layer, wherein the metal is aluminum or copper.
  • the adhesive article comprises a backing layer attached to the metal layer opposite the first adhesive layer and a second adhesive layer attached to the backing layer opposite the metal layer.
  • the present disclosure provides an adhesive article according to the fourteenth embodiment, further comprising a layer of laminating adhesive disposed between the backing layer and the first metal layer.
  • the present disclosure provides an adhesive article according to the fourteenth embodiment or the fifteenth embodiment, wherein the metal layer is a first metal layer and wherein the adhesive article further comprises a second metal layer attached to the backing layer opposite the first metal layer, wherein the metal of the second metal layer is aluminum or copper.
  • the present disclosure provides an adhesive article according to the sixteenth embodiment, further comprising a layer of laminating adhesive disposed between the backing layer and the second metal layer.
  • the present disclosure provides an adhesive article according to the sixteenth embodiment or the seventeenth embodiment, wherein the metal of at least one of the first metal layer or the second metal layer is aluminum.
  • the present disclosure provides an adhesive article according to the sixteenth embodiment or the seventeenth embodiment, wherein the metal of at least one of the first metal layer or the second metal layer is copper.
  • the present disclosure provides an adhesive article according to any of the sixteenth through nineteenth embodiments, wherein each of the first metal layer and the second metal layer independently has a thickness between 1 micrometer to 25 micrometers.
  • the present disclosure provides an adhesive article according to any of the fourteenth through twentieth embodiments, further comprising a release liner attached to the second adhesive opposite the backing layer.
  • the present disclosure provides an adhesive article according to any of the fourteenth through twenty -first embodiments, wherein each of the first adhesive layer and the second adhesive layer independently has a thickness between 50 micrometers to 100 micrometers.
  • the present disclosure provides an adhesive article according to any of the fourteenth through twenty-second embodiments, wherein at least one of the first adhesive layer or the second adhesive layer comprises a pressure sensitive adhesive (PSA).
  • PSA pressure sensitive adhesive
  • the present disclosure provides an adhesive article according to the twenty-third embodiment, wherein the PSA comprises a hot melt processable pressure sensitive adhesive comprising a (meth)acrylate-based polymer comprising the cured reaction product of a mixture comprising: a) 89.0 - 99.49% by weight of at least one fust (meth)acrylate monomer; b) 0.5 - 5.0% by weight of a non-acid-functional, ethylenically unsaturated polar monomer; c) 0 - 1% by weight of an acid-functional ethylenically unsaturated monomer; d) 0.01 - 5% by weight of at least one crosslinking moiety; and e) 0.01 - 1.0 parts by weight of at least one initiator based upon the total weight of curable components, wherein the first (meth)acrylate monomer comprises a branched (meth)acrylate with a total of 10-17 carbon atoms or a mixture of
  • the present disclosure provides an adhesive article according to any of the fourteenth through twenty -third embodiments, wherein the second adhesive layer is a heat bondable adhesive.
  • the present disclosure provides an adhesive article according to any of the fourteenth through twenty -fifth embodiments, wherein the backing layer comprises a polyolefin film.
  • the present disclosure provides an adhesive article according to the twenty-sixth embodiment, wherein the polyolefin comprises a polyethylene, a polypropylene, or a combination thereof.
  • the present disclosure provides an adhesive article according to the twenty-sixth embodiment or the twenty -seventh embodiment, wherein the polyolefin comprises a polyethylene terephthalate.
  • the present disclosure provides an adhesive article according to any of the fourteenth through twenty -eighth embodiments, wherein the adhesive layer comprises a patterned layer.
  • a sample of material from each example in Table 1 was compounded in a Bonnot Extruder from the Bonnot Company at 275°F (135°C) and screw speed of 30 rpm.
  • the heated sample was pumped to a twin screw extruder at a temperature of 320°F (160°C) and screw speed of 200 rpm.
  • the resulting hotmelt was coated onto a Metalized fdm or Bare PET as a control using a rod coater die.
  • the extrusion temperatures for the die and extruder were kept at 320°F (160°C).
  • the extruded sample was coated at 3 mil (100 micrometers) thickness.
  • the samples were then immediately cured at 50 mJ/cm 2 of UV-C radiation using a UV fusion lamp and H-bulb.
  • An anodized Aluminum substrate was obtained from IMS Inc. (Portland, ME). A piece of anodized Aluminum substrate approximately 2 inches wide x 6 inches long (5 x 15 cm) was placed on a stainless steel plate using double stick tape. Samples for 180 degree adhesion testing were produced in the form of adhesive-coated tape backing. A sample approximately 1 inch wide x 6 inches long (2.5 x 15 cm) was then cut from the tape. The tape test sample was applied to the anodized Aluminum substrate on the stainless steel plate using 2 passes with a 4.5 lb (2 kg) roller (down and back). The average force to remove the foam tape from the anodized Aluminum substrate at 180 degrees was then determined using a Zwick instrument at a testing speed of 12 inches/minute (30 cm/min).
  • Test sample preparation Tape samples of 25 mm x 75 mm size were used.
  • Test substrate Sontara was held in place against a Stainless steel panel with double stick tape.
  • Lamination sample PET film laminated tape examples were laminated onto the Sontara Spunlace Backing- with 25 mm overwrapping, then they were pressed with a 2 kg roller (round trip, 50 mm/sec).
  • Test procedure Fixed into 145-DP holding power tester (Y ASUDA SEIKI Company).

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Abstract

La présente divulgation concerne un article adhésif comprenant une couche adhésive, un revêtement antiadhésif fixé à la surface principale de la couche adhésive et une couche métallique fixée à la surface principale opposée de la couche adhésive. Le métal est de l'aluminium ou du cuivre. L'article adhésif comprend en outre une couche de polyéthylène téréphtalate fixée à la couche métallique opposée à la couche adhésive. La divulgation concerne également un autre article adhésif qui comprend une première couche adhésive et un revêtement antiadhésif fixé à une surface principale de la première couche adhésive, et une couche métallique fixée à la surface principale opposée de la première couche adhésive. De plus, l'article adhésif comprend une couche de support fixée à la couche métallique opposée à la première couche adhésive et une seconde couche adhésive fixée à la couche de support opposée à la couche métallique.
PCT/IB2025/051838 2024-03-14 2025-02-20 Articles adhésifs comprenant une couche métallique Pending WO2025191374A1 (fr)

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