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
  • C09J7/22—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
  • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
  • C09J133/04—Homopolymers or copolymers of esters
• • 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
  • C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
  • C09J133/04—Homopolymers or copolymers of esters
  • C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
  • C09J133/062—Copolymers with monomers not covered by C09J133/06
  • C09J133/064—Copolymers with monomers not covered by C09J133/06 containing anhydride, COOH or COOM groups, with M being metal or onium-cation
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
  • B32B7/04—Interconnection of layers
  • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
• • 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
  • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
  • C09J11/02—Non-macromolecular additives
  • C09J11/06—Non-macromolecular additives organic
• • 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
  • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
• • 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
  • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
  • C09J7/38—Pressure-sensitive adhesives [PSA]
• • 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
  • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
  • C09J7/38—Pressure-sensitive adhesives [PSA]
  • C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
  • C09J7/385—Acrylic polymers
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
  • C09K21/00—Fireproofing materials
  • C09K21/06—Organic materials
  • C09K21/12—Organic materials containing phosphorus
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
  • C08K5/0066—Flame-proofing or flame-retarding additives
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/49—Phosphorus-containing compounds
  • C08K5/51—Phosphorus bound to oxygen
  • C08K5/53—Phosphorus bound to oxygen bound to oxygen and to carbon only
  • C08K5/5317—Phosphonic compounds, e.g. R—P(:O)(OR')2
  • C08K5/5333—Esters of phosphonic acids
  • C08K5/5357—Esters of phosphonic acids cyclic
• • 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
  • C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
  • C09J2301/408—Additional features of adhesives in the form of films or foils characterized by the presence of essential components additives as essential feature of the adhesive layer
• • 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
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/249921—Web or sheet containing structurally defined element or component
  • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
  • Y10T428/249982—With component specified as adhesive or bonding agent
  • Y10T428/249983—As outermost component
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
  • Y10T428/2848—Three or more layers
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
  • Y10T428/2852—Adhesive compositions
  • Y10T428/2878—Adhesive compositions including addition polymer from unsaturated monomer
  • Y10T428/2891—Adhesive compositions including addition polymer from unsaturated monomer including addition polymer from alpha-beta unsaturated carboxylic acid [e.g., acrylic acid, methacrylic acid, etc.] Or derivative thereof

Definitions

• the present disclosure relates to flame retardant pressure sensitive adhesives.
• pressure sensitive adhesives containing a relatively low amount of a cyclic phosphonate ester flame retardant.
• pressure sensitive adhesives are well-known and used in a wide variety of applications.
• Acrylic adhesives are a common class of pressure sensitive adhesive.
• acrylic adhesives may be flammable and can contribute to the formation of combustion gasses during a fire.
• adhesive tapes are used widely in household, industrial, and electronic applications, there is a need to reduce or eliminate any contributions of adhesive tapes to the fire load.
• Flame retardants have been added to adhesives including acrylic adhesives.
• halogenated flame retardants such as polybrominated biphenylethers have been very effective.
• halogenated materials are being restricted or even banned due to environmental and health concerns associated with some such materials and there is a desire to find alternative flame retardants.
• Phosphites, phosphates, and phosphonates have also been used as flame retardants.
• flame retardant radiation curable compositions containing both a cyclic phosphonate and at least one other flame retardant selected from phosphorous derivates different from cyclic phosphonates are described in EP 2 154 191 Al .
• EP 2 154 191 Al exemplifies films that achieve UL 94 classification of VI or V0, but only at relatively high loadings of the cyclic phosphonate flame retardant (at least 17 weight percent) in combination with relatively high loadings of anther phosphorous-derivative fiame retardant (at least 15 weight %).
• the present disclosure provides a fiame retardant pressure sensitive adhesive comprising a polymeric component comprising an acrylic pressure sensitive adhesive and a flame retardant comprising at least one cyclic phosphonate ester, wherein the flame retardant comprises less than 2 parts by weight of a phosphorous containing flame retardant other than the cyclic phosphonate ester.
• the total amount of flame retardant is no greater than 20 parts by weight per 100 parts by weight of the polymeric component, e.g., between 3 and 15 parts by weight, inclusive, per 100 parts by weight of the polymeric component, or even between 3 and 6 parts by weight, inclusive, per 100 parts by weight of the polymeric component.
• the present disclosure provides a fiame retardant pressure sensitive adhesive comprising a polymeric component comprising an acrylic pressure sensitive adhesive and a fiame retardant comprising at least one cyclic phosphonate ester, wherein the total amount of cyclic phosphonate ester is no greater than 6 parts by weight per 100 parts by weight of the polymeric component. In some embodiments, the total amount of cyclic phosphonate ester is no greater than 6 parts by weight per 100 parts by weight of the polymeric component, e.g., between 3 and 6 parts by weight, inclusive, per 100 parts by weight of the polymeric component.
• the flame retardant comprises at least one cyclic phosphonate ester having the formula: wherein Rl and R2 are independently selected from the group consisting of a CI to C8 alkyl and a phenyl, wherein the alkyl and/or phenyl group may be substituted with at least one hydroxyl, hydroxyalkyl, or phenoxyalkyl, group; R3 and R4 are independently selected from the group consisting of CI to C4 alkyl; x is 1, 2, or 3; y is 0, 1, or 2; and z is 0 or 1; wherein the sum of x, y, and z is equal to 3.
• the cyclic phosphonate ester comprises at least one of
• the present disclosure provides adhesive articles comprising a first substrate and a first adhesive adhered to a first major surface of the first substrate, wherein the first adhesive comprises the flame retardant pressure sensitive adhesives of the present disclosure.
• the adhesive article further comprises a second adhesive wherein the first adhesive and the second adhesive are independently selected.
• the adhesive article further comprising a second substrate adhered to the first adhesive such that the first adhesive is located between the first substrate and the second substrate.
• at least one substrate comprises a polymeric film, e.g., polyester film.
• at least one substrate comprises a foam, e.g., an adhesive foam.
• FIG. 1 illustrates an exemplary adhesive article according to some embodiments of the present invention, the article having a "Spacer" configuration.
• FIG. 2 illustrates an exemplary adhesive article according to some embodiments of the present invention, the article having a "Sandwich" configuration.
• Acrylic pressure sensitive adhesives are well-known. Typically, acrylic pressure sensitive adhesive comprise the polymerization product of a monomer mixture comprising one or more (meth)acrylate ester and optionally, one or more vinyl carboxylic acids. Depending on the desired properties, other copolymerizable monomers may also be included in the monomer mixture.
• (meth)acrylate refers to one and/or both the acrylate ester and the methacrylate ester.
• butyl (meth)acrylate refers to butyl acrylate and/or butyl methacrylate.
• At least one (meth)acrylate ester is an
• alkyl(meth)acrylate In some embodiments, the alkyl group of at least one
• alkyl(meth)acrylate contains 5 to 18 carbon atoms, e.g., 5 to 12 carbon atoms. In some embodiments, the alkyl group of at least one alkyl(meth)acrylate contains 8 carbon atoms, e.g., isooctyl (meth)acrylate and 2-ethylhexyl (meth)acrylate. In some embodiments, the alkyl group of at least one alkyl(meth)acrylate contains 1 to 4 carbon atoms, e.g., butyl (meth)acrylate. In some embodiments, the alkyl group of at least one alkyl(meth)acrylate contains 1 to 3 carbon atoms, e.g., 2 carbon atoms.
• the monomer mixture includes one or more vinyl carboxylic acids.
• any known vinyl carboxylic acid or mixture of vinyl carboxylic acids may be used.
• Exemplary vinyl carboxylic acids include acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid, and ⁇ -carboxyethylacrylate.
• the vinyl carboxylic acid may be selected from the group consisting of acrylic acid, methacrylic acid, and combinations thereof.
• non-polar monomers it may be desirable to include one or more non-polar monomers.
• a "non-polar" monomer is a monomer whose homopolymer has a solubility parameter as measured by the Fedors' method of no greater than 10.5. Examples of suitable non-polar monomers and their Fedors' solubility parameter
• ((cal/cm3)l/2) include 3,3,5 trimethylcyclohexyl acrylate (9.35), isobornyl acrylate (9.71), butyl acrylate (9.77), cyclohexyl acrylate (10.16), and N-octyl acrylamide (10.33).
• the monomer mixture comprises at least 80 weight percent (wt.%) e.g., at least 90 wt.%, at least 95 wt.% or even at least 98 wt. % of the one or more alkyl (meth)acrylate monomers. In some embodiments, the monomer mixture comprises no greater than 10 wt. %, e.g., no greater than 8 wt.%, no greater than 5 wt. %, no greater than 2 wt.% or even no greater than 1 wt.% of the vinyl carboxylic acid monomers.
• the monomer mixture comprises 0 to 4 wt.%, for example 0.1 to 4 wt.%, 0.1 to 2 wt.%, 0.1 to 1 wt.%, or even 0.1 to 0.5 wt.% of the vinyl carboxylic acid monomers.
• the monomer mixture comprises at least 3 wt. %>, e.g., at least 5 wt.%> of the vinyl carboxylic acid monomers, e.g., 3 to 10 wt.%, or 5 to 10 wt.%, of the vinyl carboxylic acid monomers.
• the pressure sensitive adhesives of the present disclosure also include at least one cyclic phosphonate flame retardant.
• exemplary cyclic phosphonate esters suitable for use as flame retardants in the adhesive compositions of the present disclosure include those described in, e.g., U.S. Patent Numbers 3,789,091 and 3,849,368, as well as those available from Rhodia under the tradename AMGARD (e.g., AMGARD CU, and AMGARD 1045).
• Suitable cyclic phosphonates include those having the general structure of Formula 1 :
• Rl and R2 are independently selected from the group consisting of a CI to C8 alkyl and a phenyl, wherein the alkyl and/or phenyl group may be substituted with at least one hydroxyl, hydroxyalkyl, or phenoxyalkyl, group;
• R3 and R4 are independently selected from the group consisting of CI to C4 alkyl
• z is 0 or 1 ;
• exemplary cyclic phosphonates of Formula 1 include
• Suitable cyclic phosphonate esters include those having the general Formula 4:
• R5 and R6 are independently selected from the group consisting of C 1 to C4 alkyl groups
• R7, R8, R9, and R10 are independently selected from the group consisting of a CI to C8 alkyl and a phenyl, wherein the alkyl and/or phenyl group may be substituted with at least one hydroxyl, hydroxyalkyl, or phenoxyalkyl, group; n is 0 to 6;
• n 0 to 8.
• p 0 or 8.
• exemplary cyclic phosphonates of Formula 4 include
• the pressure sensitive adhesive compositions of the present disclosure may include any of a wide variety of know additives including, e.g., crosslinkers, initiators, fillers, tackifiers, dyes, pigments, and the like. The selection and relative amounts of such materials will depend on the desired end-use characteristics, as is well-understood by one of ordinary skill in the art.
• IOA isooctyl acrylate
• 2-EHA 2-ethylhexyl acrylate
• AA acrylic acid
• AMGARD CU and 1045 flame retardants are a blend of the cyclic phosphonates illustrated by Formulas (2) and (3).
• AMGARD SPDH is a cyclic phosphonate ester illustrated by Formula (4).
• Solvent Based Adhesives The desired solvent based adhesive (SB-ADH-1 or SB-ADH-2) was combined with 0.2 to 0.5 wt.% of a bisaziridine crosslinker and a flame retardant. The resulting composition was coated onto a release liner and sent through an oven. Here, the solvent was removed and the adhesive was thermally crosslinked to produce a 44 micrometer thick adhesive film.
• First adhesive layer 110 comprises first surface 111 adhered to first surface 131 of carrier 130.
• first surface 121 of second adhesive layer 120 is adhered to second surface 132 of carrier 130.
• Sandwich Samples were also prepared by laminating a 175 micrometer thick cover layer of PET to each of the first and second adhesive layers. As illustrated in FIG. 2, "sandwich" construction 200, comprises spacer tape 100. First cover layer 210 is adhered to second surface 112 of first adhesive layer 110. Similarly, second cover layer 220 is adhered to second surface 122 of second adhesive layer 120.
• Adhesive type Retardant FR Rating (mm/min)
• Table 3 Pressure sensitive adhesive performance for solvent based adhesives.
• UV-ADH-1 or UV-ADH-2 The desired solventless acrylic adhesive prepolymer (UV-ADH-1 or UV-ADH-2) was blended with 0.12 wt.% HDDA crosslinker, 0.2 wt.% IR-651 photoinitiator, and a flame retardant.
• the UV-ADH-1 adhesive was coated onto a release liner and passed through an ultraviolet curing station to form a 44 micrometer thick cured acrylic adhesive film. Two such films of UV-ADH-1 adhesive were laminated to opposite sides of the 12 micrometer PET carrier film to form a "spacer" construction. (See FIG.
• Table 5 Pressure sensitive adhesive performance for solventless, UV-cured adhesives.
• Adhesive films were prepared by hot melt coating a blend of the desired adhesive (HM-ADH-1, HM-ADH-2, or HM-ADH-3) and a flame retardant to produce a 44 micrometer thick layer of acrylic adhesive. These adhesive films were combined with the 12 micrometer PET carrier to form a spacer construction. (See FIG. 1.) Additional 175 micrometer PET cover films were added to provide sandwich constructions. (See FIG. 2.)
• the flame retardant pressure sensitive adhesives of the present disclosure may be used in a wide variety of applications, e.g., as free films, supported films, and single and double-sided tapes.
• Free films of adhesive may be disposed on a substrate such as a release liner, or may be located between two release liners.
• Supported films include adhesive layers incorporating any of a wide variety of well known supports such as scrims, woven and non-woven webs comprising organic and/or inorganic fibers, paper, and the like.
• Tapes typical comprise a substrate with a layer of adhesive on one side (i.e., a single-coated tape) or on opposite sides (i.e., a double coated tape).
• a substrate i.e., those comprising papers, films (e.g., polymeric films), and foils
• the substrate may comprise a foam, e.g., an adhesive foam.
• the adhesive on the opposite sides a double-sided tape are independently selected.
• both adhesives may comprise a flame retardant adhesive according to the present disclosure.
• only one of the adhesive may comprise a flame retardant adhesive according to the present disclosure.
• the second adhesive may be any known adhesive including known flame retardant, and non-flame retardant adhesives.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Health & Medical Sciences (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Adhesives Or Adhesive Processes (AREA)
• Adhesive Tapes (AREA)

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Citations (6)

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• 2011
  • 2011-03-11 CN CN2011800545830A patent/CN103210049A/zh active Pending
  • 2011-03-11 US US13/882,555 patent/US20130236718A1/en not_active Abandoned
  • 2011-03-11 WO PCT/US2011/028137 patent/WO2012060895A1/en not_active Ceased
  • 2011-03-11 EP EP11709844.2A patent/EP2635648A1/en not_active Withdrawn
  • 2011-03-11 JP JP2013537660A patent/JP5809285B2/ja not_active Expired - Fee Related
  • 2011-03-11 CN CN201410241764.XA patent/CN103980848A/zh active Pending
  • 2011-03-11 KR KR20137013461A patent/KR20130131351A/ko not_active Withdrawn
  • 2011-03-24 TW TW100110203A patent/TW201219474A/zh unknown

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