Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D133/00—Coating compositions 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; Coating compositions based on derivatives of such polymers
  • C09D133/04—Homopolymers or copolymers of esters
  • C09D133/06—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
  • C09D133/10—Homopolymers or copolymers of methacrylic acid esters
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
  • C08L83/04—Polysiloxanes
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D101/00—Coating compositions based on cellulose, modified cellulose, or cellulose derivatives
  • C09D101/02—Cellulose; Modified cellulose
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D125/00—Coating compositions 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 an aromatic carbocyclic ring; Coating compositions based on derivatives of such polymers
  • C09D125/02—Homopolymers or copolymers of hydrocarbons
  • C09D125/04—Homopolymers or copolymers of styrene
  • C09D125/06—Polystyrene
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D131/00—Coating compositions 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 an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
  • C09D131/02—Homopolymers or copolymers of esters of monocarboxylic acids
  • C09D131/04—Homopolymers or copolymers of vinyl acetate
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D133/00—Coating compositions 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; Coating compositions based on derivatives of such polymers
  • C09D133/04—Homopolymers or copolymers of esters
  • C09D133/06—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
  • C09D133/08—Homopolymers or copolymers of acrylic acid esters
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D135/00—Coating compositions 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 a carboxyl radical, and containing at least another carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Coating compositions based on derivatives of such polymers
  • C09D135/06—Copolymers with vinyl aromatic monomers
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
  • C09D175/04—Polyurethanes
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
  • C09D5/20—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for coatings strippable as coherent films, e.g. temporary coatings strippable as coherent films
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
  • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
  • C09D7/40—Additives
  • C09D7/65—Additives macromolecular
• • 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
  • C09J131/00—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 an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Adhesives based on derivatives of such polymers
  • C09J131/02—Homopolymers or copolymers of esters of monocarboxylic acids
  • C09J131/04—Homopolymers or copolymers of vinyl acetate
• • 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
  • C09J133/08—Homopolymers or copolymers of acrylic acid 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
  • C09J133/10—Homopolymers or copolymers of methacrylic acid 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
  • C09J135/00—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 a carboxyl radical, and containing at least another carboxyl radical in the molecule, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Adhesives based on derivatives of such polymers
  • C09J135/06—Copolymers with vinyl aromatic monomers
• • 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
  • C09J7/40—Adhesives in the form of films or foils characterised by release liners
  • C09J7/401—Adhesives in the form of films or foils characterised by release liners characterised by the release coating 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
  • 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
  • C09J2433/00—Presence of (meth)acrylic polymer
  • C09J2433/005—Presence of (meth)acrylic polymer in the release coating
• • 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
• • 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
  • Y10T428/2813—Heat or solvent activated or sealable
  • Y10T428/2817—Heat sealable
  • Y10T428/2826—Synthetic resin or polymer
• • 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

Definitions

• This invention relates to a low adhesion backsize and release coatings of the type employed in connection with normally tacky and pressure-sensitive adhesive coated articles and more particularly to self-associating low adhesive backsize coatings.
• the release sheet or liner to which the adhesive coated article is typically laminated is supplied with a release coating to permit the easy removal of the liner from the coated article.
• This LAB or release coating is expected to reproducibly provide an appropriate level of release from the adhesive of interest, to not deleteriously affect the adhesive, and to be resistant to aging so that the release level remains relatively stable with time.
• D. Satas, Chapt. 23 "Release Coatings", Handbook of Pressure Sensitive Adhesive Technology, Second Edition, D. Satas, ed., Van Nostrand Reinhold, 1989, defines seven distinct levels of release, ranging from "super low release” (0.15-0.30 N/dm) to "very tight release” (20-80 N/dm).
• the release coating on masking tape must possess good solvent resistance in addition to providing a surface to which paint can adhere.
• Release coatings and LABs are typically applied to substrates at coating weights around 1 g/m 2 . In order to obtain such thin coatings, dilute solutions (2 to
• a release coating comprising a hydrocolloid stabilized aqueous emulsion of a crosslinkable film forming vinyl polymer having a glass transition temperature of from 0° to 60°C and from 0.5 to 20% by weight on emulsion polymer solids of a release promoting compound including silicone copolyols, hydrocarbon or fluorocarbon Werner complexes, or organofunctional siloxanes.
• a release promoting compound including silicone copolyols, hydrocarbon or fluorocarbon Werner complexes, or organofunctional siloxanes.
• a substrate coated with a release coating composition consisting essentially of poly vinyl alcohol, a migratable release- promoting agent, a water-soluble salt of a coordinating metal, and a water soluble boron compound.
• the release-promoting agent is functionally defined as a surfactant that gives a release value less than about 162.5 grams per centimeter for masking tape when formulated at 5% loading into polyvinyl alcohol. Not only does this example require cross-linking, but uses salts of a coordinating metal, which can be toxic.
• an aqueous based release coating composition suitable for a repositionable adhesive that comprises about 10 to about 80 parts by wet weight of a sulfosuccinamate surfactant and about 20 to about 90 parts by wet weight of an acrylic copolymer. These compositions appear to rely solely on ionic interactions, which tend to be sensitive to humidity.
• a further need is a release coating prepared from water based materials that does not require organic cosolvents to provide acceptable release performance on coating and drying.
• a still further need is a release coating delivered from water with the above attributes that is capable of being written on with water based pens and which securely anchors paint and ink.
• (c) is water dispersible or water-based or a latex emulsion
• (e) optionally, may be crosslinked and (2) 75% to 25% by weight on a solids basis of a release-promoting additive having a molecular weight of 10,000 or less, wherein the release- promoting additive is
• bifunctional material (a) a bifunctional material, wherein such bifunctional material has (i) a release moiety at one end, and (ii) an anchoring moiety at the other end has a complementary function to the functional moiety of the functional polymer, and
• the functional polymer in combination with the release-promoting additive advantageously minimizes surface energy and cohesive failure.
• the functionality of the functional polymer is selected in such way as to promote ionic interactions, acid-base interactions, and/or hydrogen bonding. It is preferable that the combination of the functional polymer and the release promoting additive work in such a fashion as to provide more than one interaction per molecule of each component, for example multiple hydrogen bonds or acid-base interactions.
• This invention describes a low adhesion backsize (LAB) material made by mixing together materials, which will self-associate.
• the mixtures can be waterbased and have high solids levels.
• the release is provided by functional groups such as silicones, fluorocarbons or long chain hydrocarbons. Release level can be tailored with release levels as low as the 0.5 gram/cm range to microsphere adhesives.
• the two components can be coated in layers instead of mixing together and coating.
• the functional base polymer can be coated and dried on the substrate, followed by coating and drying of the release promoting additive.
• one of the coatings can be applied to the substrate and subsequently, the second layer could be applied.
• the functional polymer layer could be applied at the time a substrate is manufactured. When used, this substrate could then be coated with the release promoting additive material, thus providing the combination of the present invention. This would be advantageous, for example, when the functional base polymer is included in a coating that is needed on the substrate, such as a matte coating on a film substrate.
• Useful functional base polymers are those that are water dispersible, water- based, or a latex emulsion material. General physical properties include glass transition temperatures above room temperature and film formation upon drying.
• the polymer may be a copolymer and may be crosslinked. From a chemical nature, the polymer unit includes functional moieties that complement the functional groups on the release component.
• Such functionalities include hydrogen bond donors, such as carboxylic acids or alcohols; hydrogen bond acceptors, such as substituted amides or ethers; acidic groups; basic groups; anionic groups; cationic groups or combinations thereof. Particularly useful types of such polymers containing these functionalities include but are not limited to
• (meth)acrylates vinyl acetates, styrenes, polyurethanes, cellulosics, and the like.
• Preferred polymers are the (meth)acrylates.
• Most preferred are carboxylic (meth)acrylates, which are commercially available. Specific examples include Rohm & Haas Acusol or Acrysol series of carboxylic latices and B.F.Goodrich Carboset series.
• the release promoting additive materials useful in this invention are bifunctional.
• bifunctional it is meant that the release promoting additive material has at least two portions wherein one portion has a release moiety and the other portion an anchoring moiety.
• Useful materials have a molecular weight generally less than 10,000, preferably less than 5,000 since it is believed that lower molecular weight allows for mobility of the material to the air interface during drying.
• the additive should be water dispersible or water miscible.
• the release moiety can be a long chain hydrocarbon, a fluorochemical, or a silicone.
• the poly(dimethyl siloxane) group is used as it provides low release with minimal loading.
• the anchoring moieties include hydrogen bond donors, such as carboxylic acids or alcohols; hydrogen bond acceptors, such as substituted amides, or ethers; acidic groups; basic groups; anionic groups; or cationic groups.
• This anchoring group is chosen to provide a complementary functionality to that of the functional base polymer.
• release promoting additive materials having bifunctionality include nonionic surfactants, long chain alkyl carboxylic acids and their salts; silicone copolyols and fluorochemical surfactants.
• water dispersible or water soluble materials examples include, but are not limited to: Brij and Tween surfactants available from ICI Chemicals; Silwet silicone surfactants from Witco Corp.; the silicone surfactant series from Dow Corning; and the Zonyl series of fluorochemical surfactants from Du Pont.
• the combination of the functional base polymer and a release promoting additive are chosen such that the anchoring moiety of the release promoting additive and the functional moiety of the functional base polymer are complementary. This is to provide interactions such as hydrogen bonding, acid-base interaction, or ionic interaction. It is preferable that the combination of the functional polymer and the release promoting additive work in such a fashion as to provide more than one interaction per molecule.
• a polyether chain with a polyacrylic acid chain form multiple hydrogen bonds between the two chains.
• the resulting release surface will have minimum surface energy, and good cohesive strength.
• the functional polymer is generally in the range from 25 to 75 % by weight of the composition and a release promoting additive is 75 to 25 % by weight of the composition.
• the low adhesion backsize coating of the present invention can be a combination of more than one functional polymer with a single release promoting additive, a single functional polymer with more than one release promoting additive and more than one functional polymer with more than one release promoting additive. Furthermore, each functional polymer and each release promoting additive may have more than one functional moiety.
• the release coatings defined above are best used as a coating for a solid substrate, which may be a sheet, fiber or shaped object.
• the preferred substrates are fixed flexible substrates such as are used for pressure sensitive adhesive products.
• Suitable substrates include paper, coated paper such as polymeric coated or saturated paper (for example polyethylene coated kraft paper), metal sheets and foils, non- woven fabrics, and films of thermoplastic resins such as polyesters, polyamides, polyolefins, polycarbonate, polyvinyl chloride, etc., although any surface requiring release toward adhesives can be used.
• Primers known in the art can be utilized to aid in adhesion of the coating to the substrate, but they are not generally necessary.
• Release coating compositions of the present invention may be applied to suitable substrates by means of conventional coating techniques such as wire- wound rod, direct gravure, offset gravure, reverse roll, air-knife, and trailing blade coating; hot melt coating is also possible.
• the transfer tape comprises a film of pressure-sensitive adhesive between two release liners, at least one being coated with the low adhesion backsize of this invention.
• Additional articles include but are not limited to a single coated sheet material, a stack of coated sheets, a fan-folded web of coated sheet material and a roll of coated sheet material.
• Such coated sheet materials generally comprise a coating of the release coating composition of the present invention on at least a portion of one side of the sheet and an adhesive is on at least a portion of the other side.
• the adhesive is a normally tacky and pressure-sensitive adhesive.
• the stack of superimposed sheets of the coated sheet material comprises a series of pressure-sensitive adhesive coated sheets being in contact with a release coating composition portion of an immediately adjacent sheet.
• Additional articles include, but are not limited to:
• the two components can be coated in layers instead of mix and coating.
• the functional base polymer can be coated and dried on the substrate, followed by coating and drying of the release promoting additive. This would be advantageous, for example, when the functional base polymer is included in a coating that is needed on the substrate, such as a matte coating on a film substrate.
• This invention is further illustrated by the following examples that are not intended to limit the scope of the invention. In the examples, all parts, ratios and percentages are by weight unless otherwise indicated. The following test methods • were used to evaluate and characterize the self-associating low adhesion backsize produced in the examples. Examples
• the release values reported in the Tables are an average of three tests. After release testing the adhesive coated sheets were set aside for use in the readhesion test described below. The adhesive coated sheets used for testing were ScotchTM MagicTM Tape 810 and Post-it® Notes available from 3M Company, St. Paul, MN, unless otherwise noted.
• Acrysol ASE-60 is a 29% solids carboxylated latex available from Rohm and Haas Co., Philadelphia, PA.
• Dow Corning 193 is a 100% solids silicone ethylene oxide copolymer available from Dow Corning, Midland MI.
• Brij 76 is a 100% solids polyoxyethylene stearyl ether available from ICI Surfactants, Wilmington, DE.
• Acusol 810A is an 18% solids carboxylated latex available from Rohm and Haas Co., Philadelphia, PA.
• Acusol 842 is an 18% solids carboxylated latex available from Rohm and Haas Co., Philadelphia, PA.
• Poly(l -vinyl pyrrolidone-co-styrene) is available from Aldrich Chemical, Milwaukee, WI.
• Poly(diallyldimethyl ammonium chloride) is available from Aldrich Chemical, Milwaukee, WI.
• FC-120 is a fluorochemical surfactant available from 3M Company, St. Paul, MN.
• Example 2 was prepared according to the procedure of Example 1 except that the mixture was coated onto a 1.6 mil (0.041 mm) thick biaxially oriented polypropylene film (available from AMTOPP Corp., Livingston, NJ) using a #12 Meyer rod.
• a 1.6 mil (0.041 mm) thick biaxially oriented polypropylene film available from AMTOPP Corp., Livingston, NJ
• Example 4 1.0 grams of stearic acid and 5.0 grams of ammonium hydroxide (5% solution) were premixed with 5.0 grams of deionized water by stirring with a spatula in a beaker for one minute. The solution was then added to 1.5 grams of poly(l -vinyl pyrrolidone-co-styrene) in a beaker while stirring with a magnetic stirrer. The mixture was stirred for one minute. The mixture was then coated onto the matte side of a 1.8 mil (0.046 mm) thick biaxially oriented polypropylene film (available from Luxus Pack Packaging Quan Yin Hsiang, Taouan Hsien, Taiwan) using a #6 Meyer rod. The coated film was then dried in an oven at 65 °C for fifteen minutes.
• a 1.8 mil (0.046 mm) thick biaxially oriented polypropylene film available from Luxus Pack Packaging Quan Yin Hsiang, Taouan Hsien, Taiwan
• Example 5 0.50 grams of FC-120 fluorocarbon surfactant was added to 5.64 grams of poly(diallyldimethyl ammonium chloride) in a beaker while stirring with a magnetic stirrer. The mixture was stirred for one minute. The mixture was then coated onto the matte side of a 1.8 mil (0.046 mm) thick biaxially oriented polypropylene film (available from Luxus Pack Packaging Quan Yin Hsiang, Taouan Hsien, Taiwan) using a #6 Meyer rod. The coated film was then dried in an oven at 65°C for fifteen minutes.
• FC-120 fluorocarbon surfactant was added to 5.64 grams of poly(diallyldimethyl ammonium chloride) in a beaker while stirring with a magnetic stirrer. The mixture was stirred for one minute. The mixture was then coated onto the matte side of a 1.8 mil (0.046 mm) thick biaxially oriented polypropylene film (available from Luxus Pack Packaging Quan Yin Hsiang, Taouan
• Acrysol ASE-60 was coated onto the matte side of a 1.8 mil (0.046 mm) thick biaxially oriented polypropylene film (available from Luxus Pack Packaging Quan Yin Hsiang, Taouan Hsien, Taiwan) using a #6 Meyer rod. The coated film was then dried in an oven at 65°C for fifteen minutes.
• Example 7 Acrysol ASE-60 was coated onto the matte side of a 1.8 mil (0.046 mm) thick biaxially oriented polypropylene film (available from Luxus Pack Packaging Quan Yin Hsiang, Taouan Hsien, Taiwan) using a #6 Meyer rod. The coated film was then dried in an oven at 65 °C for fifteen minutes.
• Latex polymer preparation is a Latex polymer preparation:
• the latex was coated onto the matte side of a 1.8 mil (0.046 mm) thick biaxially oriented polypropylene film (available from Luxus Pack Packaging Quan Yin Hsiang, Taouan Hsien, Taiwan) using a #6 Meyer rod. The coated film was then dried in an oven at 65 °C for fifteen minutes.
• the solution was then coated onto the latex coated side of the above biaxially oriented polypropylene film using a #6 Meyer rod.
• the coated film was then dried in an oven at 65 °C for fifteen minutes.
• Examples 1-3 were tested for release as described above. Results are given in Table 1. Examples 4-7, C8, and C9 were tested for release and readhesion as described above. Results are given in Table 2. Table 1
• ScotchTM MagicTM Tape 810 and ScotchTM Masking Tape No. 232 both available from 3M Company, St. Paul, MN) when laminated to this coating and then peeled off by hand.
• Unithox D-100 3.6 grams were added to 5.0 grams of Acusol 810A in a beaker while stirring with a magnetic stirrer. The mixture was stirred for twenty minutes. The mixture was then coated onto a 1.6 mil (0.041 mm) thick polyester film (from 3M Specialty Film Division, St Paul, MN) using a #12 Meyer rod. The coated film was then dried in a 65 °C oven for five minutes.
• Tween 61 1.5 grams was premixed with 6.0 grams of deionized water by stirring with a spatula in a beaker until a clear solution was obtained. The solution was then added to 5.0 grams of Acusol 820 in a beaker while stirring with a magnetic stirrer. The mixture was stirred for twenty minutes. The resultant mixture was then coated onto a 1.6 mil (0.041 mm) thick polyester film (from 3M Specialty Film Division, St Paul, MN) using a #12 Meyer rod. The coated film was then dried in a 65 °C oven for five minutes.
• ScotchTM Masking Tape No. 232 both available from 3M Company, St. Paul, MN laminated to this coating and then peeled off by hand.
• ScotchTM MagicTM Tape 810 and ScotchTM Masking Tape No. 232 both available from 3M Company, St. Paul, MN) when laminated to this coating and then peeled off by hand.
• the release coated material was tested for release and readhesion as described above using a Post-it® Note as the adhesive coated sheet for testing.
• the Post-it® Note was laminated to the release coated surface using a pressure of 4.5x10 5 N/m 2 for 30 seconds instead of using a 2 kilogram hard rubber roller.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
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• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Wood Science & Technology (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Adhesive Tapes (AREA)
• Paints Or Removers (AREA)
• Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
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• 1999
  • 1999-04-09 US US09/288,911 patent/US6352766B1/en not_active Expired - Lifetime
  • 1999-08-09 AU AU54729/99A patent/AU5472999A/en not_active Abandoned
  • 1999-08-09 CN CN99816549A patent/CN1348487A/zh active Pending
  • 1999-08-09 MX MXPA01010128A patent/MXPA01010128A/es not_active IP Right Cessation
  • 1999-08-09 JP JP2000611621A patent/JP2002542332A/ja active Pending
  • 1999-08-09 WO PCT/US1999/018025 patent/WO2000061693A1/en not_active Ceased
  • 1999-08-09 KR KR1020017012797A patent/KR20020026151A/ko not_active Withdrawn
  • 1999-08-09 CA CA002369295A patent/CA2369295A1/en not_active Abandoned
  • 1999-08-09 EP EP99940990A patent/EP1171538A1/en not_active Withdrawn

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