EP4127263A1 - Konversionsbeschichtung für schwefelwasserstoff produzierende flüssigkeiten enthaltende dosen - Google Patents

Konversionsbeschichtung für schwefelwasserstoff produzierende flüssigkeiten enthaltende dosen

Info

Publication number
EP4127263A1
EP4127263A1 EP21717743.5A EP21717743A EP4127263A1 EP 4127263 A1 EP4127263 A1 EP 4127263A1 EP 21717743 A EP21717743 A EP 21717743A EP 4127263 A1 EP4127263 A1 EP 4127263A1
Authority
EP
European Patent Office
Prior art keywords
metal
conversion coating
group
coating layer
hydrogen sulfide
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
EP21717743.5A
Other languages
English (en)
French (fr)
Inventor
Silvia BEZER
Vincent S. PAGNOTTI
Mark Mcmillen
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.)
PPG Industries Ohio Inc
Original Assignee
PPG Industries Ohio Inc
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 PPG Industries Ohio Inc filed Critical PPG Industries Ohio Inc
Publication of EP4127263A1 publication Critical patent/EP4127263A1/de
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/34—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
    • C23C22/36—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also phosphates
    • C23C22/361—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also phosphates containing titanium, zirconium or hafnium compounds
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
    • C23C22/30—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds containing also trivalent chromium
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/34—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
    • C23C22/36—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also phosphates
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/40—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
    • C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/40—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates
    • C23C22/42—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing molybdates, tungstates or vanadates containing also phosphates
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/82—After-treatment

Definitions

  • the present disclosure relates in general to a metal can having a hydrogen sulfide liquid deposited therein, wherein the metal can comprises a conversion coating layer deposited on at least a portion of an inside surface thereof and a film forming layer.
  • Coatings are applied to numerous substrates to provide protective and/or decorative qualities.
  • Certain liquids have sulfur dioxide and/or analogues such as metabisulphite added to stabilize the liquid and to prevent growth of unwanted bacteria and yeast.
  • Other liquids may lead to the production of sulfur dioxide through metabolism of sulfur-containing amino acids or other organic processes.
  • sulfur dioxide and/or analogues may cause production of volatile sulfur compounds (VSCs) such as hydrogen sulfide, H2S, which create issues with respect to corrosion of the containers, “rotten egg” odor production, and tainting of the liquid in the metal cans.
  • VSCs volatile sulfur compounds
  • the present disclosure is directed to a metal can comprising a conversion coating layer deposited on at least a portion of an inside surface of the metal can, wherein the conversion coating layer comprises a lanthanide series element, a Group VIB metal, a Group IIIB metal, a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non -phosphorous-containing monomeric subunit m2; a film-forming layer deposited on at least a portion of the conversion coating layer; and a hydrogen sulfide producing liquid inside the metal can.
  • the conversion coating layer comprises a lanthanide series element, a Group VIB metal, a Group IIIB metal, a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non -phosphorous-containing monomeric subunit m2; a film-forming layer deposited on at
  • a metal can comprising a conversion coating layer deposited on at least a portion of the inside surface of the metal can, wherein the conversion coating layer is deposited from a conversion coating composition comprising a lanthanide series element, a Group VIB metal, a Group IIIB metal, a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non-phosphorous- containing monomeric subunit m2; a film-forming layer deposited on at least a portion of the conversion coating layer; and a hydrogen sulfide producing liquid inside the metal can.
  • a conversion coating composition comprising a lanthanide series element, a Group VIB metal, a Group IIIB metal, a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non-phosphorous- containing monomeric subunit m2
  • Also provided in this disclosure is a method of packaging a hydrogen sulfide producing liquid in a metal can, the method comprising depositing the hydrogen sulfide producing liquid inside the metal can, wherein the metal can comprises a conversion coating layer deposited on at least a portion of an inside surface of the metal can, wherein the conversion coating layer comprises a lanthanide series element, a Group VIB metal, a Group IIIB metal, a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non-phosphorous-containing monomeric subunit m2; and a film-forming layer deposited on at least a portion of the conversion coating layer.
  • the present disclosure also contemplates a metal can comprising a conversion coating layer deposited on at least a portion of an internal surface of the metal can, the conversion coating layer comprising a lanthanide series element, a Group VIB metal, a Group IIIB metal, a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non -phosphorous-containing monomeric subunit m2; a film forming layer deposited on at least a portion of the conversion coating layer; and a hydrogen sulfide producing liquid deposited inside the metal can, wherein the hydrogen sulfide producing liquid exhibits a hydrogen sulfide concentration of less than 35 ppb as measured by a gas detection tube for at least two months after the metal can is sealed.
  • a metal can comprising, or consisting essentially of, or consisting of, a conversion coating layer deposited on at least a portion of the inside surface of the metal can, wherein the conversion coating layer comprises a lanthanide series element, a Group VIB metal, Group IIIB metal, a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non- phosphorous-containing monomeric subunit m2; a film-forming layer deposited onto at least a portion of the conversion coating layer; and a hydrogen sulfide-producing liquid deposited inside the metal can.
  • the conversion coating layer comprises a lanthanide series element, a Group VIB metal, Group IIIB metal, a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non- phosphorous-containing monomeric subunit m2; a film-
  • a “conversion coating” layer, composition, or like terms, as used herein, refers to a self-supporting inorganic continuous or semi -continuous layer formed on the metal can surface via a chemical process that reacts with the metal can surface.
  • a “continuous layer” refers to an unbroken layer of conversion coating formed on the whole substrate surface.
  • a “semi -continuous layer” is one that is broken; that is, the layer is not continuous across the whole surface.
  • the conversion coating layer disclosed herein reduces the oxidation of the metal substrate of the can by the hydrogen sulfide producing liquid, thereby preventing and/or reducing the subsequent reduction of the sulfur dioxide and other sulfur compounds in the hydrogen sulfide producing liquid which lead to hydrogen sulfide production. Inhibiting such reactions between the metal of the can and the free sulfide dioxide in the hydrogen sulfide producing liquid is believed to reduce and/or prevent corrosion of the metal can and tainting of the hydrogen sulfide producing liquid, such as, without limitation, wine, deposited within.
  • metal can includes any type of metal can, container or any type of receptacle or portion thereof that is sealed by the content manufacturer (e.g. food and/or beverage manufacturer) to minimize or eliminate spoilage of the contents until such metal can is opened by the consumer.
  • the cans can include “two piece cans” and “three-piece cans” as well as drawn and ironed one-piece cans; such one piece cans often find application with aerosol products.
  • the metal can may be a food and/or beverage can.
  • the metal can may be a monobloc aerosol can and/or tube. Suitable examples of monobloc aerosol cans and/or tubes include, but are not limited to, deodorant and hair spray containers.
  • the metal can may be a metal can bottle.
  • the metal can may be formed from any suitable material.
  • the metal can comprises metal substrates, metal alloy substrates, and/or substrates that have been metallized, such as nickel plated plastic.
  • Suitable examples include, but are not limited to, the following: steel; tinplate; tinplate pre-treated with a protective material such as chromium, titanium, titanate or aluminum; tin-free steel (TFS); galvanised steel, such as for example electro-galvanised steel; aluminum; aluminum alloy; and combinations thereof.
  • the metal or metal alloy may comprise or be steel, aluminum, magnesium, and/or alloys thereof.
  • the steel substrate may be cold rolled steel, hot rolled steel, electrogalvanized steel, and/or hot dipped galvanized steel.
  • Aluminum alloys of the 1XXX, 2XXX, 3XXX, 4XXX, 5XXX, 6XXX, or 7XXX series as well as clad aluminum alloys also may be used as the substrate.
  • Aluminum alloys may comprise 0.01% by weight copper to 10% by weight copper.
  • Aluminum alloys which are treated may also include castings, such as 1XX.X, 2XX.X, 3XX.X, 4XX.X, 5XX.X, 6XX.X, 7XX.X, 8XX.X, or 9XX.X (e.g.: A356.0).
  • the metal can comprise aluminum alloy in the 3XXX series, such as aluminum alloy AA3104, AA3003, AA3004, AA3005, and/or AA5XXX series.
  • Magnesium alloys of the AZ31B, AZ91C, AM60B, or EV31 A series also may be used as the substrate.
  • substrates may comprise non-metal conductive materials including composite materials such as, for example, materials comprising carbon fibers or conductive carbon.
  • the substrate may also comprise other suitable non-ferrous metals such as titanium or copper, as well as alloys of these materials.
  • the can body and can end of the metal can may be formed from the same or different materials, such as the same or different metals.
  • the can body and can end of the metal may be formed from the same material, such as the same metal.
  • the can body and/or can end may be made from coiled metal stock.
  • at least the can end may be formed from coiled metal stock.
  • the conversion coating compositions of the present invention may be applied to coiled metal stock, such as the coiled metal stock from which the ends of cans are made (“can end stock”).
  • the conversion coating composition may be applied to the can end stock prior to the can end being cut and stamped out of the coiled metal stock.
  • the can ends having a score line thereon may be “easy open” can ends, sometimes referred to as “easy open ends” or even “EOEs”.
  • the score line is applied to the can ends after the can ends have punched from the coated metal stock.
  • the can ends, once formed, are suitably attached to a can body.
  • the can end may be attached to the can body by any suitable method.
  • the can end may be attached to the can body by an edge rolling process.
  • the coating compositions may be applied to substantially all of or to a portion of the interior surface of the can end.
  • the coating compositions may be applied to at least a portion of the interior surface of the can end over at least a portion of the score line.
  • the conversion coating composition may be applied to at least the internal surface of the can end over a portion of the score line or may be applied over all of the score line.
  • the coating compositions may be applied to substantially all of the interior surface of the can end.
  • the metal can comprises a conversion coating layer deposited on at least a portion of the inside surface of the metal can, wherein the conversion coating layer comprises a lanthanide series element, a Group VIB metal, Group IIIB metal, a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non-phosphorous-containing monomeric subunit m2.
  • the conversion coating layer may be deposited on at least a portion of an internal surface of a can body and/or a can end of the metal can.
  • the conversion coating layer may be formed from a conversion composition comprising, or consisting essentially of, or consisting of, a lanthanide series element, a Group VIB metal, a Group IIIB metal, a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non -phosphorous-containing monomeric subunit m2.
  • the lanthanide series element may comprise cerium, praseodymium, terbium, and/or alloys thereof.
  • the Group IIIB metal may comprise yttrium, scandium, and/or alloys thereof.
  • the Group IVB metal may comprise zirconium, titanium, hafnium, and/or alloys thereof.
  • the Group VIB metal may comprise chromium (III), chromium (VI), molybdenum, and combinations thereof.
  • the conversion coating layer may comprise a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non-phosphorous- containing monomeric subunit m2.
  • a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non-phosphorous- containing monomeric subunit m2.
  • the metal can comprises aluminum and/or aluminum alloy
  • the conversion coating layer is formed when aluminum oxide on the surface forms esters with phosphate or phosphonic groups (Al-O-P bonds) of the homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non -phosphorous-containing monomeric subunit m2.
  • the copolymer may be a dipolymer, a terpolymer, or a higher polymer.
  • the homopolymer or copolymer may be a statistical or a block homopolymer or copolymer and may be formed by radical continuous or batchwise polymerization.
  • homopolymer and “homopolymer comprising monomeric subunits ml,” when used with respect to the homopolymer disclosed herein, refers to a homopolymer resulting from the polymerization of one kind of monomer ml, wherein the homopolymer does not comprise any other monomeric subunits.
  • copolymer when used with respect to the present invention, refers to a dipolymer or higher copolymer resulting from the polymerization of at least one kind of monomer ml and at least one kind of monomer m2 or at least two kinds of monomers ml.
  • copolymer includes dipolymers, terpolymers, and higher copolymers.
  • the terms “dipolymer,” when used with respect to the copolymer of the present invention, refers to a copolymer resulting from the polymerization of one kind monomer ml and one kind of monomer m2 or two kinds of monomers ml.
  • terpolymer when used with respect to the present invention, refers to a copolymer resulting from the polymerization of three monomeric subunit types, where at least one monomer is ml.
  • Suitable examples of the phosphorous-containing monomeric subunits ml include organophosphorous compounds containing phosphates, phosphate salts, and/or phosphate esters, phosphonic acids, phosphonic acid salts, and/or phosphonic esters, and/or phosphinic acids, phosphinic acid salts, and/or phosphinic esters.
  • Examples include, but are not limited to, vinyl phosphonic acid, dimethyl vinyl phosphonate, diethyl vinyl phosphonate, r other dialkyl vinyl phosphonates, maleic acid dimethyl phosphonate, maleic acid diethyl phosphonate, phosphate-, phosphonate-, or phosphinate-substituted methacrylate or acrylate monomers, phosphate-, phosphonate-, or phosphinate-substituted acrylamide monomers, or other monomers containing phosphorus-containing substituents and a polymerizable bond.
  • (meth)acrylic acid when used with respect to the monomeric units, refers to acrylic and/or methacrylic acid subunits.
  • (meth)acrylate refers to an acrylate, a methacrylate, or a mixture of acrylate and methacrylate.
  • Suitable examples of phosphorous-containing monomeric subunits ml include those comprising the structure of Formula F , wherein Ri and R2 comprise hydrogen, a cation, an alkyl radical, an aryl radical, or a phosphoester group, and R3 comprises an organic linking group terminating in an atom that is covalently bonded to an atom present in the addition polymer backbone.
  • the organic linking group may comprise at least one carbon atom, and may comprise additional functional groups, such as, for example, one or more ether, amine, or hydroxyl functional groups, among other functional groups, and at least a portion of the organic linking group may comprise a polyether if at least two ether groups are present.
  • the organic linking group may comprise an organic chain, and the organic chain may terminate in a carbon atom on either side of the chain.
  • phosphorous-containing monomeric subunits ml include those comprising the structure of Formula II: , wherein Ri and R2 comprises hydrogen, a cation, an alkyl radical, an aryl radical, or a phosphoester group, wherein Ri and R2 may be the same or different, and wherein R3 comprises an organic linking group terminating in an atom that is covalently bonded to a carbon atom present in the addition polymer backbone.
  • the organic linking group may comprise at least one carbon atom, and may comprise additional functional groups, such as, for example, one or more ether, amine, or hydroxyl functional groups, among other functional groups, and at least a portion of the organic linking group may comprise a polyether if at least two ether groups are present.
  • the organic linking group may comprise an organic chain, and the organic chain may terminate in a carbon atom on either side of the chain.
  • phosphorous-containing monomeric subunits ml include those comprising the structure of Formula III: wherein Ri comprises hydrogen, a cation, an alkyl radical, an aryl radical, or a phosphoester group, R2 comprises hydrogen, an alkyl radical, or an aryl radical, and R3 comprises an organic linking group terminating in an atom that is covalently bonded to an atom present in the addition polymer backbone.
  • the organic linking group may comprise at least one carbon atom, and may comprise additional functional groups, such as, for example, one or more ether, amine, or hydroxyl functional groups, among other functional groups, and at least a portion of the organic linking group may comprise a polyether if at least two ether groups are present.
  • the organic linking group may comprise an organic chain, and the organic chain may terminate in a carbon atom on either side of the chain.
  • phosphorus-containing monomeric subunits ml include those comprising a polymerizable double bond and a phosphorus containing functional group such as a phosphine, phosphine oxide, phosphonium salt, or phosphate amide.
  • Monomeric subunit m2 may be any non-phosphorous-containing monomer that is capable of co-polymerizing with monomer subunits ml.
  • m2 may be a carboxylic acid- or anhydride-containing monomeric subunit.
  • Monomeric subunit m2 may be an acid or anhydride functional ethylenically unsaturated monomer. Suitable examples of monomeric subunits m2 include methacrylic acid, acrylic acid, maleic acid or its anhydride, fumaric acid, itaconic acid or its anhydride.
  • Monomeric subunit m2 also may be a (meth)acrylate.
  • Suitable examples of (meth)acrylate monomeric subunits m2 include alkyl esters of (meth)acrylic acid.
  • alkyl esters of (meth)acrylic acid include methyl (meth)acrylate, ethyl (meth)acrylate and propyl (meth)acrylate.
  • monomeric subunit m2 examples include (meth)acrylamides, such as N-isopropyl acrylamide, esters of maleic acid, fumaric acid, or itaconic acid, vinyl monomers such as styrenics, such as styrene sulfonic acid, vinyl ethers, or other monomers containing a polymerizable double bond, such as N-vinylpyrrolidone.
  • (meth)acrylamides such as N-isopropyl acrylamide, esters of maleic acid, fumaric acid, or itaconic acid
  • vinyl monomers such as styrenics, such as styrene sulfonic acid, vinyl ethers, or other monomers containing a polymerizable double bond, such as N-vinylpyrrolidone.
  • the copolymer disclosed herein may include a dipolymer comprising subunits ml and m2 and having the structure of Formula IV: varies from 0 to 95 mol%.
  • Monomeric subunit ml may be present in the homopolymer or copolymer in an amount of at least 5 molar percent based on total molarity of the homopolymer or copolymer, such as at least 20 molar percent, such as at least 40 molar percent, and may, in some instances, be present in the homopolymer or copolymer an amount of 100 molar percent based on total molarity of the homopolymer or copolymer, such as no more than 80 molar percent, such as no more than 70 molar percent.
  • Monomeric subunit ml may be present in the homopolymer or copolymer in an amount of 5 molar percent to 100 molar percent based on total molarity of the homopolymer or copolymer, such as 20 molar percent to 80 molar percent, such as 40 molar percent to 70 molar percent.
  • Monomeric subunit m2 may be absent from the homopolymer or copolymer.
  • Monomeric subunit m2 may be present in the homopolymer or copolymer disclosed herein, if at all, in an amount of at least 0.1 molar percent based on total molarity of the homopolymer or copolymer, such as at least 20 molar percent, such as at least 30 molar percent, and may, in some instances, be present in the homopolymer or copolymer an amount of 95 molar percent based on total molarity of the homopolymer or copolymer, such as at least 80 molar percent, such as at least 30 molar percent.
  • Monomeric subunit m2 may be present in the homopolymer or copolymer in an amount of 0.1 molar percent to 95 molar percent based on total molarity of the homopolymer or copolymer, such as 20 molar percent to 80 molar percent, such as 30 molar percent to 60 molar percent.
  • the homopolymer or copolymer may be present in the conversion coating composition in an amount of at least 100 ppm based on total weight of the conversion coating composition, such as at least 150 ppm, such as at least 300 ppm, such as at least 400 ppm, and may, in some instances, be present in the conversion coating composition in an amount of no more than 3000 ppm based on total weight of the conversion coating composition, such as no more than 1000 ppm, such as no more than 750 ppm, such as no more than 600 ppm.
  • the homopolymer or copolymer may be present in the conversion coating composition in an amount of 100 ppm to 3000 ppm based on total weight of the conversion coating composition, such as 150 ppm to 1000 ppm, such as 300 ppm to 750 ppm, such as 400 ppm to 600 ppm.
  • the conversion coating composition and/or the conversion coating layer formed therefrom may further comprise a Group IA metal, a Group IIA metal, a Group VB metal, a Group VIIB metal, and/or a Group XII metal.
  • the Group IA metal may comprise lithium.
  • the Group IIA metal may comprise magnesium.
  • the Group VB metal may comprise vanadium.
  • the Group VIIB metal may comprise manganese.
  • the Group XII metal may comprise zinc .
  • the layer can have a thickness that is uniform or a thickness that is variable; that is, the layer may have a different thickness at different locations on the treated substrate.
  • the average thickness of the conversion coating layer on the metal surface may be 0.05 mg/square inch (msi) or less, such as 0.001 msi to 0.05 msi, 0.001 msi to 0.04 msi, 0.001 msi to 0.03 msi, 0.001 msi to 0.02 msi, 0.01 msi to 0.05 msi, or 0.01 msi to 0.02 msi or any other range combination using these endpoints.
  • the average thickness of the conversion coating layer on the metal surface may be 0.05 msi, 0.04 msi, 0.02 msi, 0.01 msi, 0.005 msi, or 0.001 msi.
  • the average thickness is determined by using a stripping solution of known volume to remove the conversion coating from a piece of the coated can of known area and then measuring the zirconium concentration in the solution by inductively coupled plasma-optical emission spectroscopy (ICP-OES). The concentration of zirconium is then converted to msi (mg per square inch) and determined to be the thickness of the conversion coating layer.
  • ICP-OES inductively coupled plasma-optical emission spectroscopy
  • the film-forming layer can be deposited from a film forming composition.
  • Any suitable film forming composition can be used according to the present invention.
  • the term "film forming composition” refers to a composition, typically comprising one or more film-forming resins, that can form a self-supporting continuous or semi-continuous film on at least a horizontal surface of a substrate upon removal of any diluents or carriers present in the composition or upon curing at ambient or elevated temperature.
  • Conventional film-forming resins that may be used include, without limitation, those typically used in packaging coating compositions.
  • the film forming composition may comprise a thermosetting film forming resin or a thermoplastic film forming resin.
  • thermosetting refers to resins that “set” irreversibly upon curing or crosslinking, wherein the polymer chains of the polymeric components are joined together by covalent bonds. This property is usually associated with a cross- linking reaction of the composition constituents often induced, for example, by heat or radiation. Curing or crosslinking reactions also may be carried out under ambient conditions. Once cured or crosslinked, a thermosetting resin will not melt upon the application of heat and is insoluble in solvents.
  • thermoplastic refers to resins that comprise polymeric components that are not joined by covalent bonds and thereby can undergo liquid flow upon heating and are soluble in solvents.
  • Ambient conditions generally refer to room temperature and humidity conditions or temperature and humidity conditions that are typically found in the area in which the composition is applied to a substrate, e.g., at 10°C to 40°C and 5% to 80% relative humidity, such as at 20°C to 40°C and 20% to 80% relative humidity, while elevated temperatures are temperatures that are above ambient temperature.
  • the film forming composition may comprise any of a variety of polymers well- known in the art. Generally, these polymers may be any polymers of these types made by any method known to those skilled in the art.
  • the film forming composition may comprise, for example, an acrylic polymer, a polyester polymer, a phenolic resin, an epoxy resin, an epoxy mimic, a laminate, a polyurethane polymer, a polyamide polymer, polyvinyl chloride (PVC) resins, alkyd resins, a polyether polymer, a polysiloxane polymer, and/or copolymers thereof.
  • PVC polyvinyl chloride
  • the film forming composition may comprise a phenolic resin, an epoxy resin, a polyester polymer, an acrylic polymer, and/or a polyolefin polymer.
  • the film-forming composition may comprise an acrylic polymer.
  • the film forming layer may comprise a phenolic, an epoxy, a polyester, an acrylic, and/or a polyolefin.
  • the film forming composition may comprise an emulsion polymerized latex acrylic material, a solution polymerized latex acrylic material, amine epoxy polymerized material, or a combination thereof.
  • the film forming composition may comprise a core shell acrylic latex.
  • the functional groups on the film forming resin may be selected from any of a variety of reactive functional groups, including, for example, carboxylic acid groups, amine groups, epoxide groups, hydroxyl groups, thiol groups, carbamate groups, amide groups, urea groups, isocyanate groups (including, without limitation, blocked isocyanate groups), mercaptan groups, and combinations thereof.
  • the film forming layer on the metal can have any suitable dry film thickness.
  • the film forming layer may have a dry film thickness of greater than 2 microns (pm), greater than 5 pm, greater than 10 pm, less than 40 pm, less than 30 pm, less than 20 pm, or a range combination using these endpoints.
  • the dry film thickness may be 2 pm to 40 pm, 2 pm to 30 pm, 2 pm to 20 pm, 5 pm to 40 pm, 5 pm to 30 pm, 5 pm to 20 pm, or the like.
  • the dry film thickness of the film forming layer is determined using a SENCON SI9600 Coating Thickness Gauge.
  • hydrogen sulfide producing liquid liquids which, before being deposited in the metal can, include at least 1 part per million (ppm) of a sulfur source, e.g. sulfites, and in which reactions between the uncoated metal substrate and sulfur source produces hydrogen sulfide.
  • a sulfur source e.g. sulfites
  • the hydrogen sulfide producing liquid comprises at least 5 ppm, at least 7 ppm, at least 10 ppm, at least 30 ppm, at least 50 ppm, and/or less than 100 ppm, less than 70 ppm, less than 50 ppm of a sulfur source.
  • the hydrogen sulfide producing liquid comprises 5 ppm to 100 ppm of a sulfur source, such as 7 ppm to 70 ppm, such as 10 ppm to 50 ppm, such as 30 ppm to 50 ppm.
  • a sulfur source such as 7 ppm to 70 ppm, such as 10 ppm to 50 ppm, such as 30 ppm to 50 ppm.
  • the sulfur can be detected using a variety of known methods, including, without limitation, ion selective electrodes, gas chromatograph with a sulfur chemoluminescence detector, and/or gas detection tube. Values herein are provided using the gas detection tube method described herein.
  • the hydrogen sulfide producing liquid deposited in the metal can comprise wine, beer, cider, cocktails, kombucha, fruit juice, vinegar, cordial, coconut milk, soft drink, mead, perfume, body spray, or any other liquid in which reactions between the uncoated metal substrate and sulfur source produces hydrogen sulfide.
  • the hydrogen sulfide producing liquid deposited in the metal can may comprise wine.
  • the wine may comprise sparkling wine, red wine, white wine, or rose wine.
  • a metal can comprising a conversion coating layer deposited on at least a portion of the inside surface of the metal can, wherein the conversion coating layer is deposited from a conversion coating composition comprising a lanthanide series element, a Group VIB metal, a Group IIIB metal, a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non- phosphorous-containing monomeric subunit m2; a film-forming layer deposited on at least a portion of the conversion coating layer; and a hydrogen sulfide producing liquid deposited inside the metal can such that an internal surface of the can is at least partially in contact with the hydrogen sulfide-producing liquid.
  • a conversion coating composition comprising a lanthanide series element, a Group VIB metal, a Group IIIB metal, a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit
  • the conversion coating composition may comprise a source of the lanthanide series element, Group VIB metal, Group IIIB metal, and/or Group IVB metal present in the conversion coating layer.
  • the Group IVB metal in the conversion coating layer may comprise zirconium.
  • Suitable sources of the zirconium in the conversion coating composition include, but are not limited to, hexafluorozirconic acid, alkali metal and ammonium salts thereof, ammonium zirconium carbonate, zirconyl nitrate, zirconyl sulfate, zirconium carboxylates and/or zirconium hydroxycarboxylates, such as acid hydrofluorozirconic, zirconium acetate, zirconium oxalate, ammonium zirconium glycolate, ammonium zirconium lactate, and/or zirconium ammonium citrate.
  • the source of the zirconium in the conversion coating composition may comprise hexafluorozirconic acid.
  • the Group IVB metal also may be titanium and/or hafnium.
  • Suitable sources of the titanium compounds include, but are not limited to, fluorotitanic acid and/or its salts.
  • a suitable source of the hafnium compound includes, but is not limited to, hafnium nitrate.
  • the Group VIB metal may comprise molybdenum and/or chromium.
  • a suitable source of molybdenum in the conversion coating composition may be in the form of a salt.
  • Suitable molybdenum salts may include sodium molybdate, calcium molybdate, potassium molybdate, ammonium molybdate, molybdenum chloride, molybdenum acetate, molybdenum sulfamate, molybdenum formate, and/or molybdenum lactate.
  • Suitable sources of chromium may include chromium (III) and/or chromium (VI).
  • the conversion coating composition of the present invention may comprise a trivalent chromium cation.
  • the conversion coating composition may further comprise an anion that may be suitable for forming a salt with the trivalent chromium cation, including for example a sulfate, a nitrate, an acetate, a carbonate, a hydroxide, or combinations thereof.
  • the conversion coating composition may exclude hexavalent chromium or compounds that include hexavalent chromium.
  • Non-limiting examples of such materials include chromic acid, chromium trioxide, chromic acid anhydride, dichromate salts, such as ammonium dichromate, sodium dichromate, potassium dichromate, and calcium, barium, magnesium, zinc, cadmium, and strontium dichromate.
  • hexavalent chromium in any form, such as, but not limited to, the hexavalent chromium-containing compounds listed above.
  • the conversion compositions and/or coatings or layers, respectively, deposited from the same may be substantially free, may be essentially free, and/or may be completely free of one or more of any of the elements or compounds listed in the preceding paragraph.
  • a conversion coating composition and/or coating or layer, respectively, formed from the same that is substantially free of hexavalent chromium or derivatives thereof means that hexavalent chromium or derivatives thereof are not intentionally added, but may be present in trace amounts, such as because of impurities or unavoidable contamination from the environment.
  • the amount of material is so small that it does not affect the properties of the conversion composition; in the case of hexavalent chromium, this may further include that the element or compounds thereof are not present in the conversion compositions and/or coatings or layers, respectively, formed from the same in such a level that it causes a burden on the environment.
  • the term “substantially free” means that the conversion coating composition and/or coating or layers, respectively, formed from the same contain less than 10 ppm of any or all of the elements or compounds listed in the preceding paragraph, based on total weight of the composition or the layer, respectively, if any at all.
  • the term “essentially free” means that the conversion coating composition and/or coatings or layers, respectively, formed from the same contain less than 1 ppm of any or all of the elements or compounds listed in the preceding paragraph, if any at all.
  • the term “completely free” means that the conversion coating composition and/or coatings or layers, respectively, formed from the same contain less than 1 ppb of any or all of the elements or compounds listed in the preceding paragraph, if any at all.
  • the conversion coating composition may further comprise a source of phosphate ions.
  • the source of phosphate ions may comprise phosphoric acid, such as 75% phosphoric acid, monosodium phosphate and/or di sodium phosphate.
  • the source of phosphate ions may be present in the conversion coating composition in an amount of 2 ppm to 300 ppm, such as 25 ppm to 100 ppm based on the total weight of the ingredients in the conversion coating composition.
  • the conversion coating composition may comprise a source of phosphate ions in an amount of 100 ppm to 300 ppm, 100 ppm to 200 ppm, 110 ppm to 200 ppm, 120 ppm to 180 ppm, or, in some cases, 140 ppm to 180 ppm.
  • the conversion coating composition may further comprise a source of free fluoride.
  • free fluoride refers to isolated fluoride ions.
  • the source of free fluoride in the conversion coating composition may derive from the source of the lanthanide series element, Group VIB metal, Group IIIB metal, and/or Group IVB metal used in the conversion coating composition.
  • the source of free fluoride in the conversion coating composition may derive from the source of the Group VIB metal used in the conversion coating composition, such as, for example, hexafluorozirconic acid and/or hexafluorotitanic acid and salts thereof.
  • the lanthanide series element, Group VIB metal, Group IIIB metal, and/or Group IVB metal used in the conversion coating composition that forms the conversion coating may be present as the fluometallate ion, e.g., ZrF 6 .
  • fluometallate ion reacts with the substrate and the component hydrolyzes to form the oxide
  • fluoride ions can be released as free fluoride.
  • the equilibrium of the deposition reaction starts to move away from oxide formation back in the direction of the fluometallate ion; in other words, the solubility of the component increases and it becomes more difficult to form the conversion coating film.
  • the source of free fluoride may comprise one of the Group IVB metal compounds described above.
  • the source of free fluoride may comprise a compound other than the lanthanide series element, Group VIB metal compound, Group IIIB metal compound, and/or Group IVB metal compound.
  • the source of free fluoride may comprise any fluoride-containing compound including monofluorides, bifluorides, fluoride complexes, and mixtures thereof known to generate fluoride ions. Non-limiting examples of such sources include 1-IF, NH4F, NFI4HF2, NaF, and NaHF2.
  • Examples also include ammonium and alkali metal fluorides, acid fluorides, fluoroboric, fluorosilicic, fluorotitanic, and fluorozirconic acids and their ammonium and alkali metal salts, and other inorganic fluorides, non-limiting examples of which are: zinc fluoride, zinc aluminum fluoride, titanium fluoride, zirconium fluoride, nickel fluoride, ammonium fluoride, sodium fluoride, potassium fluoride, and hydrofluoric acid, as well as other similar materials known to those skilled in the art. Water-soluble fluoride compounds may be utilized to introduce the free fluoride.
  • Suitable fluoride compounds include alkali metal fluorides such as sodium fluoride, ammonium fluoride salts such as ammonium fluoride and ammonium bifluoride, other inorganic fluoride salts such as sodium silicofluoride, ammonium silicofluoride, hydrofluoric acid, hydrofluorosilicic acid, such as 23% hydrofluorosilicic acid, and fluoboric acid, such as 50% fluoboric acid.
  • the free fluoride may be present in the conversion coating composition in an amount of 5 ppm to 300 ppm, such as 25 ppm to 100 ppm based on the total weight of the ingredients in the conversion coating composition.
  • the conversion coating composition may comprise free fluoride in an amount of 100 ppm to 300 ppm free fluoride, 100 ppm to 200 ppm free fluoride, 110 ppm to 200 ppm free fluoride, 120 ppm to 180 ppm free fluoride, or, in some cases, 140 ppm to 180 ppm free fluoride.
  • the free fluoride ions may be present in the conversion coating composition in a weight ratio of free fluoride ions to the Group VIB metal, Group IIIB metal and/or Group IVB metal of 40 to 1, and in some cases, 8 to 1.
  • the conversion coating composition may have a pH of less than 7, and in some cases the pH may be within the range of 1 to 6, such as 1.5 to 5.5.
  • the pH of the conversion coating composition may be maintained through the inclusion of pH adjusters, such as an acid and/or a base.
  • the pH may be adjusted using mineral acids, such as hydrofluoric acid, fluoboric acid and/or phosphoric acid; organic acids, such as lactic acid, acetic acid, citric acid, tannic acid, and/or sulfamic acid; and/or water soluble or water dispersible bases, such as sodium hydroxide, ammonium hydroxide, ammonia, or amines such as tri ethyl amine, and/or methylethyl amine.
  • the pH may also be adjusted using inorganic acids such as, for example, sulfuric acid, hydrochloric acid, and/or nitric acid.
  • the pH adjusters may be in the conversion coating composition in an amount of 0.01% w/w to 10% w/w of the conversion coating.
  • the acid and/or base may be in an amount of 0.01% w/w to 9% w/w, 0.01% w/w to 8% w/w, 0.01% w/w to 7% w/w, 0.01% w/w to 6% w/w, 0.01% w/w to 5% w/w, 0.02% w/w to 10% w/w, 0.02% w/w to 9% w/w, 0.02% w/w to 8% w/w, 0.02% w/w to 7% w/w, 0.02% w/w to 6% w/w, 0.02% w/w to 5% w/w, 0.03% w/w to 10% w/w, 0.03% w/w to 9% w/w, 0.03% w/w to 8% w/w
  • the conversion coating composition may further comprise an electropositive metal.
  • the electropositive metal may comprise copper, nickel, silver, gold, and combinations thereof.
  • the electropositive metal may comprise copper.
  • the copper may comprise copper nitrate, copper sulfate, copper chloride, copper carbonate, or copper fluoride.
  • the electropositive metal may comprise from greater than 0 to 150 parts per million (ppm) based on a total weight of the ingredients in the conversion coating composition.
  • the electropositive metal may be present in the conversion composition in an amount of at least 2 ppm based on total weight of the ingredients in the conversion coating composition, such as at least 10 ppm, such as at least 50 ppm, such as at least 75 ppm, such as at least 100 ppm, and may be present in an amount of no more than 150 ppm.
  • the electropositive metal may comprise 2 ppm to 150 ppm, 10 ppm to 150 ppm, 50 ppm to 150 ppm, 75 ppm to 150 ppm, 100 ppm to 150 ppm, based on a total weight of the ingredients in the conversion coating composition.
  • the conversion coating composition may comprise hexafluorozirconic acid as a source of Group VIB metal as well as a source of free fluoride, hydrofluorosilicic acid and fluoboric acid as a source of free fluoride, phosphoric acid as a source of phosphate ions, sodium gluconate as the sequestering agent, nitric acid, aqueous ammonia, and tannic acid as pH adjusters, and deionized water.
  • the coating composition may comprise hexafluorozirconic acid as a source of the Group VIB metal, phosphoric acid as the source of phosphate ions, copper nitrate as the electropositive metal, and deionized water.
  • the present disclosure is also directed to a method of packaging a hydrogen sulfide producing liquid in a metal can, the method comprising depositing the hydrogen sulfide producing liquid inside the metal can, wherein the metal can comprises a conversion coating layer deposited on at least a portion of the inside surface of the metal can, wherein the conversion coating layer comprises a lanthanide series element, Group VIB metal, Group IIIB metal, Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non-phosphorous-containing monomeric subunit m2; and a film-forming layer deposited on at least a portion of the conversion coating layer.
  • the conversion coating composition disclosed herein may be applied to a metal substrate, such as at least a portion of an internal surface of a can body and/or a can end of the metal can. Any suitable technique may be used to apply the conversion coating composition onto the substrate, including, for example, brushing, dipping, flow coating, spraying and the like. In some instances, however, such depositing of the conversion composition may comprise an electrocoating step wherein an electrodepositable composition is deposited onto a metal substrate by electrodeposition.
  • the conversion coating composition may be applied as a spray.
  • a pump may draw the conversion coating composition out of a tank/bath through the spray risers, and after spraying onto the substrate, the excess conversion coating composition drains back into the tank/bath.
  • a film forming composition may be deposited onto at least a portion of the surface of the substrate that has been contacted with the conversion coating composition.
  • Any suitable technique may be used to deposit such a film forming composition onto the substrate, including, for example, brushing, dipping, flow coating, spraying and the like.
  • depositing of the film forming composition may comprise an electrocoating step wherein an electrodepositable composition is deposited onto a metal substrate by electrodeposition.
  • depositing of a film forming composition comprises a powder coating step.
  • the depositing of a film forming composition could be a laminate.
  • the film forming composition may be a liquid coating composition.
  • the method may further comprise applying the film forming composition to form the film forming layer onto at least a portion of the metal can having the conversion coating composition deposited thereon.
  • the method may further comprise applying a coating derived from the film forming composition to form the film forming layer onto at least a portion of the metal can having the conversion coating composition deposited thereon.
  • the film forming composition may be cured by any suitable method.
  • the film forming composition may be cured by heat curing, radiation curing, or by chemical curing, such as by heat curing.
  • the film forming composition when heat cured, may be cured at any suitable temperature.
  • the film forming composition when heat cured, may be cured to a peak metal temperature (PMT) of 150 to 350°C, such as from 175 to 320°C, such as from 190 to 300°C, or even from 200 to 280°C.
  • the film forming composition when heat cured, may be cured at 210°C or at 260°C. Curing the film forming composition forms the film forming layer described herein.
  • the substrate may optionally be subjected to other treatments prior to coating.
  • the substrate may be cleaned, cleaned and deoxidized, anodized, acid pickled, plasma treated, laser treated, or ion vapor deposition (IVD) treated.
  • IVD ion vapor deposition
  • At least a portion of the metal substrate surface may be cleaned and/or deoxidized and/or otherwise pretreated by any conventional means known in the art of cleaning or pretreating a metal substrate prior to contacting at least a portion of the substrate surface with the conversion coating composition, in order to remove grease, dirt, and/or other extraneous matter.
  • At least a portion of the surface of the substrate may be cleaned by physical and/or chemical means, such as mechanically abrading the surface and/or cleaning/degreasing the surface with commercially available alkaline or acidic cleaning agents that are well known to those skilled in the art.
  • acidic cleaners examples include PCL-452 (sulfuric acid based with surfactants) and ACC45SS (hydrofluoric acid based), which can be used as a two-part system and each of which are commercially available from PPG Industries, Inc. Such cleaners are often preceded or followed by a water rinse, such as with tap water, distilled water, deionized water, or combinations thereof.
  • the cleaned substrate surface may be deoxidized, mechanically and/or chemically.
  • the term “deoxidize” means removal of the native oxide layer found on the surface of the substrate in order to promote uniform deposition of the conversion coating composition as well as to promote the adhesion of the film forming composition to the substrate surface.
  • Suitable deoxidizers will be familiar to those skilled in the art.
  • a typical mechanical deoxidizer may be uniform roughening of the substrate surface, such as by using a scouring or cleaning pad.
  • Typical chemical deoxidizers include, for example, acid-based deoxidizers such as phosphoric acid, nitric acid, fluoroboric acid, sulfuric acid, chromic acid, hydrofluoric acid, ammonium bifluoride, or Amchem 7/17 deoxidizers (available from Henkel Technologies, Madison Heights, Mich.), OAKITE DEOXIDIZER LNC (commercially available from Chemetall), TURCO DEOXIDIZER 6 (commercially available from Henkel), Chemdeox 395 (fluorosilicic acid based), Chemdeox 400 (sulfuric acid, fluorosilicic acid and hydrofluoric acid based), Ultrax (AMC) 66 (commercially available from PPG Industries, Inc.) or combinations thereof.
  • acid-based deoxidizers such as phosphoric acid, nitric acid, fluoroboric acid, sulfuric acid, chromic acid, hydrofluoric acid, ammonium bifluoride, or Amchem 7/17 deoxidizers (
  • the chemical deoxidizer comprises a carrier, often an aqueous medium, so that the deoxidizer may be in the form of a solution or dispersion in the carrier, in which case the solution or dispersion may be brought into contact with the substrate by any of a variety of known techniques, such as dipping or immersion, spraying, intermittent spraying, dipping followed by spraying, spraying followed by dipping, brushing, or roll-coating.
  • a temperature range of the solution or dispersion when applied to the metal substrate, based on etch rates, for example, at a temperature ranging from 50° F. to 150° F. (10° C. to 66° C.), such as from 70° F. to 130° F.
  • the contact time may be from 30 seconds to 20 minutes, such as 1 minute to 15 minutes, such as 90 seconds to 12 minutes, such as 3 minutes to 9 minutes.
  • the substrate optionally may be rinsed with tap water, deionized water, and/or an aqueous solution of rinsing agents in order to remove any residue.
  • the wet substrate surface may be pretreated by any method familiar to those skilled in the art of substrate protection, such an anodized or treated with a conversion coating composition, and/or may be treated one of the treatment compositions described above, or the substrate may be dried prior to treating the substrate surface, such as air dried, for example, by using an air knife, by flashing off the water by brief exposure of the substrate to a high temperature, such as 15° C. to 100° C., such as 20° C. to 90° C., or in a heater assembly using, for example, infrared heat, such as for 10 minutes at 70° C., or by passing the substrate between squeegee rolls.
  • the conversion coating composition and/or film forming composition may be applied to the metal substrate of the metal can, or a portion thereof, as a single layer or as part of a multi-layer system.
  • the conversion coating composition may be applied as a single layer.
  • the conversion coating composition may be applied as two or more layers.
  • the conversion coating composition may be applied to an uncoated substrate.
  • an “uncoated substrate” includes a surface that is cleaned prior to application.
  • the film forming composition may be applied as a single layer.
  • the film forming composition may be applied as two or more layers.
  • the film forming composition may be applied on top of another layer as part of a multi layer system. For example, the film forming composition may be applied on top of a primer which is on top of the conversion coating layer.
  • the film forming composition may form an intermediate layer or a top coat layer.
  • the film forming composition may be applied as the first coat of a multi coat system.
  • the film forming composition may be applied as an undercoat or a primer.
  • the second, third, fourth etc. coats may comprise any suitable coating compositions such as those comprising, for example, polyvinyl chloride (PVC) resins, alkyd resins; polyolefin resins, epoxy resins; polyester resins; polyurethane resins; polysiloxane resins; hydrocarbon resins or combinations thereof.
  • the second, third, fourth etc. coats may comprise polyester resins.
  • the second, third, fourth etc. coats may be a liquid coating or a powder coating.
  • the conversion coating composition and/or film forming composition may be applied to the metal substrate before or after forming the metal can.
  • the conversion coating composition and/or film forming composition may be applied onto a can coil stock and then drawn into tubes, cans, or can lids (such as, without limitation, full aperture easy open ends).
  • the conversion coating composition and/or film forming composition may be applied to the preformed metal can.
  • coated metal cans of the present invention may demonstrate corrosion resistance and the hydrogen producing liquid sealed in such cans may demonstrate a reduction or prevention of as compared to metal cans that have not been treated as described herein.
  • the hydrogen sulfide producing liquid when deposited in the coated metal can and sealed, may exhibit an average hydrogen sulfide concentration of less than 35 ppb, such as less than 20 or less than 10 ppb, using a gas detection tube method as described below for at least 2 months after the can is sealed.
  • the average hydrogen sulfide concentration may be less than 5 ppb or even less than 1 ppb for at least 2 months after the metal can is sealed.
  • the hydrogen sulfide producing liquid when deposited in the coated metal can and sealed, may exhibit an average hydrogen sulfide concentration of less than 35 ppb, such as less than 20 or less than 10 ppb, using a gas detection tube method as described below for at least 3 months, for at least 4 months, for at least 5 months, for at least 6 months, for at least 7 months, for at least 8 months, for at least 9 months, for at least 10 months, for at least 11 months, or for at least 12 months after the can is sealed.
  • concentrations of FhS disclosed herein were determined by sparging the wine and measuring the effluent with a gas detection tube (Gastec 4LT, Japan) that was previously calibrated against sodium sulfide in wine.
  • the conversion coating compositions and/or the film forming compositions may be substantially free, may be essentially free or may be completely free of styrene.
  • substantially free in relation to styrene, it is meant that the film forming resin is formed from monomers which comprise less than 5 wt% of styrene based on the total weight of the monomers from which the film forming resin is formed.
  • essentially free in relation to styrene is meant that the film forming resin is formed from monomers which comprise less than 1 wt% of styrene based on the total weight of the monomers from which the film forming resin is formed.
  • the film forming resin is formed from monomers which comprise less than 0.01 wt% of styrene based on the total weight of the monomers from which the film forming resin is formed.
  • the film forming resin may be formed from monomers which comprise no, i.e. 0 wt%, styrene based on the total weight of the monomers from which the film forming resin is formed.
  • the conversion coating compositions and/or the film forming compositions of the present disclosure may be substantially free, may be essentially free or may be completely free of bisphenol A (BP A) and derivatives thereof.
  • Derivatives of bisphenol A include, for example, bisphenol A diglycidyl ether (BADGE).
  • the conversion coating layer and/or the film forming layer of the present disclosure may also be substantially free, may be essentially free or may be completely free of bisphenol F (BPF) and derivatives thereof.
  • Derivatives of bisphenol F include, for example, bisphenol F diglycidyl ether (BPFG).
  • BPFG bisphenol F diglycidyl ether
  • the compounds or derivatives thereof mentioned above may not be added to the composition intentionally but may be present in trace amounts because of unavoidable contamination from the environment.
  • Substantially free refers to coating compositions, or components thereof, containing less than 1000 parts per million (ppm) of any of the compounds or derivatives thereof mentioned above. “Essentially free” refers to coating compositions, or components thereof, containing less than 100 ppm of any of the compounds or derivatives thereof mentioned above. By “completely free” refers to coating compositions, or components thereof, containing less than 20 parts per billion (ppb) of any of the compounds or derivatives thereof mentioned above.
  • the conversion coating compositions and/or the film forming compositions may be substantially free, may be essentially free or may be completely free of formaldehyde. “Substantially free” refers to coating compositions, or components thereof, containing less than 1000 parts per million (ppm) of formaldehyde. “Essentially free” refers to coating compositions, or components thereof, containing less than 100 ppm of any of formaldehyde. “Completely free” refers to coating compositions, or components thereof, containing less than 20 parts per billion (ppb) of formaldehyde. [0084] For purposes of the detailed description, it is to be understood that the invention may assume various alternative variations and step sequences, except where expressly specified to the contrary.
  • Group IA metal and “Group IA element” refer to an element that is in Group IA of the CAS version of the Periodic Table of the Elements as is shown, for example, in the Handbook of Chemistry and Physics, 63 rd edition (1983), corresponding to Group 1 in the actual IUPAC numbering.
  • Group IA metal compound refers to compounds that include at least one element that is in Group IA of the CAS version of the Periodic Table of the Elements.
  • Group IIA metal and “Group IIA element” refer to an element that is in group IIA of the CAS version of the Periodic Table of the Elements as is shown, for example, in the Handbook of Chemistry and Physics, 63 rd edition (1983), corresponding to Group 2 in the actual IUPAC numbering.
  • Group IIA metal compound refers to compounds that include at least one element that is in Group IIA of the CAS version of the Periodic Table of the Elements.
  • Group IIIB metal and “Group IIIB element” refer to an element that is in Group IIIB of the CAS version of the Periodic Table of the Elements as is shown, for example, in the Handbook of Chemistry and Physics, 63 rd edition (1983), corresponding to Group 3 in the actual IUPAC numbering.
  • Group IIIB metal compound refers to compounds that include at least one element that is in Group IIIB of the CAS version of the Periodic Table of the Elements.
  • Group IVA metal and “Group IVA element” refer to an element that is in group IVA of the CAS version of the Periodic Table of the Elements as is shown, for example, in the Handbook of Chemistry and Physics, 63 rd edition (1983), corresponding to Group 14 in the actual IUPAC numbering.
  • Group IVA metal compound refers to compounds that include at least one element that is in Group IVA of the CAS version of the Periodic Table of the Elements.
  • Group IVB metal and “Group IVB element” refer to an element that is in group IVB of the CAS version of the Periodic Table of the Elements as is shown, for example, in the Handbook of Chemistry and Physics, 63 rd edition (1983), corresponding to Group 4 in the actual IUPAC numbering.
  • Group IVB metal compound refers to compounds that include at least one element that is in Group IVB of the CAS version of the Periodic Table of the Elements.
  • Group VB metal and “Group VB element” refer to an element that is in group VB of the CAS version of the Periodic Table of the Elements as is shown, for example, in the Handbook of Chemistry and Physics, 63 rd edition (1983), corresponding to Group 5 in the actual IUPAC numbering.
  • Group VB metal compound refers to compounds that include at least one element that is in Group VB of the CAS version of the Periodic Table of the Elements.
  • Group VIB metal and “Group VIB element” refer to an element that is in group VIB of the CAS version of the Periodic Table of the Elements as is shown, for example, in the Handbook of Chemistry and Physics, 63 rd edition (1983), corresponding to Group 6 in the actual IUPAC numbering.
  • Group VIB metal compound refers to compounds that include at least one element that is in Group VIB of the CAS version of the Periodic Table of the Elements.
  • Group VIIB metal and “Group VIIB element” refer to an element that is in group VIIB of the CAS version of the Periodic Table of the Elements as is shown, for example, in the Handbook of Chemistry and Physics, 63 rd edition (1983), corresponding to Group 7 in the actual IUPAC numbering.
  • Group VIIB metal compound refers to compounds that include at least one element that is in Group VIIB of the CAS version of the Periodic Table of the Elements.
  • the terms “on,” “onto,” “applied on,” “applied onto,” “formed on,” “deposited on,” “deposited onto,” mean formed, overlaid, deposited, or provided on but not necessarily in contact with the surface.
  • a film forming composition “deposited onto” a substrate does not preclude the presence of one or more other intervening coating layers of the same or different composition located between the film forming composition and the substrate.
  • salt refers to an ionic compound made up of cations and anions and having an overall electrical charge of zero. Salts may be hydrated or anhydrous.
  • composition refers to a solution, mixture, or dispersion in a medium.
  • a “coating composition” refers to a composition that, in an at least partially dried or cured state, is capable of producing a film, layer, or the like on at least a portion of a substrate surface.
  • the term “dispersion” refers to a two-phase transparent, translucent or opaque system in which particles are in the dispersed phase and an aqueous medium, which includes water, is in the continuous phase.
  • deoxidizing composition refers to a composition having a pH of no greater than 3.0 and a free fluoride content of no greater than 50 ppm based on total weight of the deoxidizing composition and that is capable of etching and/or reacting with and chemically altering a substrate surface.
  • deoxidizing composition bath or “deoxidizing bath” refers to an aqueous bath containing a deoxidizing composition and that may contain components that are byproducts of the process.
  • cleaning composition refers to a composition that removes oil, soil, and other contaminants from a substrate surface and that optionally is capable of etching or oxidizing the substrate surface.
  • cleaning composition bath refers to an aqueous bath containing a cleaner composition and that may contain components that are byproducts of the process.
  • pretreatment composition refers to a composition that is capable of reacting with and chemically altering the substrate surface and binding to it to form a film that affords corrosion protection.
  • pretreatment bath refers to an aqueous bath containing a conversion composition and that may contain components that are byproducts of the process.
  • the recitation of numerical ranges by endpoints includes all integer numbers and, where appropriate, fractions subsumed within that range (e.g. 1 to 5 can include 1, 2, 3, 4 when referring to, for example, a number of elements, and can also include 1.5, 2, 2.75 and 3.80, when referring to, for example, measurements).
  • the recitation of end points also includes the end point values themselves (e.g. from 1.0 to 5.0 includes both 1.0 and 5.0). Any numerical range recited herein is intended to include all sub-ranges subsumed therein.
  • cure or “curing”, means that the components that form the composition are crosslinked to form a film, layer, or bond.
  • at least partially cured means that at least a portion of the components that form the composition interact, react, and/or are crosslinked to form a film, layer, or bond.
  • the term "and/or,” when used in a list of two or more items, means that any one of the listed items can be employed by itself or any combination of two or more of the listed items can be employed. For example, if a list is described as comprising group A, B, and/or C, the list can comprise A alone; B alone; C alone; A and B in combination; A and C in combination, B and C in combination; or A, B, and C in combination.
  • polymer refers broadly to prepolymers, oligomers and both homopolymers and copolymers. It should be noted that the prefix “poly” refers to two or more.
  • the present invention thus relates in particular, without being limited thereto, to the following aspects:
  • a metal can comprising a conversion coating layer deposited on at least a portion of an inside surface of the metal can, wherein the conversion coating layer comprises a lanthanide series element, a Group VIB metal, Group IIIB metal, a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non-phosphorous-containing monomeric subunit m2; a film-forming layer deposited on at least a portion of the conversion coating layer; and a hydrogen sulfide producing liquid deposited inside the metal can.
  • the conversion coating layer comprises a lanthanide series element, a Group VIB metal, Group IIIB metal, a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non-phosphorous-containing monomeric subunit m2; a film-forming layer deposited on at least a portion of the conversion coating layer; and
  • Aspect 2 The metal can of Aspect 1, wherein the metal can comprises aluminum, an aluminum alloy, and/or steel.
  • the metal can of Aspect 2, wherein the metal can comprises aluminum alloy.
  • Aspect 4. The metal can of any of the foregoing aspects, wherein the lanthanide series element comprises lanthanum and/or cerium, the Group VIB metal comprises chromium and/or molybdenum, Group IIIB metal comprises yttrium, and the Group IVB metal comprises zirconium, titanium, and/or hafnium.
  • the metal can of any of the foregoing aspects, wherein the Group IVB metal comprises zirconium.
  • the metal can of Aspect 4, wherein the chromium comprises chromium (III) and/or chromium (VI).
  • Aspect 7. The metal can of any of the foregoing aspects, wherein the hydrogen sulfide producing liquid comprises wine, beer, fruit juice, vinegar, cordial, coconut milk, soft drink, cider, kombucha, or mead.
  • Aspect 8 The metal can of any of the foregoing aspects, wherein the conversion coating layer has an average thickness of 0.001 msi to 0.05 msi as measured by ICP-OES.
  • the metal can of any of the foregoing aspects, wherein the film forming layer comprises an acrylic, a polyester, a phenolic, a polyolefin, and/or an epoxy.
  • the metal can of any of the foregoing aspects, wherein the film forming layer comprises an emulsion polymerized acrylic latex.
  • the metal can of any of the foregoing aspects, wherein the film forming layer has a dry film thickness of 2 microns to 20 microns as measured by a SENCON SI9600 Coating Thickness Gauge.
  • the metal can of any of the foregoing aspects, wherein the conversion coating layer is on at least a portion of a can body of the metal can.
  • the metal can of any of the foregoing aspects, wherein the conversion coating layer is on at least a portion of a can end of the metal can.
  • a metal comprising a conversion coating layer deposited on at least a portion of the inside surface of the metal can, wherein the conversion coating layer is deposited from a conversion coating composition comprising a lanthanide series element, a Group VIB metal, Group IIIB metal, a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non- phosphorous-containing monomeric subunit m2; a film-forming layer deposited on at least a portion of the conversion coating layer; and a hydrogen sulfide producing liquid inside the metal can.
  • a conversion coating composition comprising a lanthanide series element, a Group VIB metal, Group IIIB metal, a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non- phosphorous-containing monomeric subunit m2
  • a film-forming layer deposited on
  • Aspect 15 The metal can of Aspect 14, wherein the metal can comprises aluminum, aluminum alloy, and/or steel.
  • Aspect 16 The metal can of Aspect 15, wherein the metal can comprises aluminum alloy.
  • Aspect 17 The metal can of Aspect 14 to 16, wherein the Group IVB metal comprises hexafluorozirconic acid.
  • Aspect 18 The metal can of Aspects 14 to 17, wherein the conversion coating composition further comprises a source of phosphate ions.
  • Aspect 19 The metal can of Aspect 18, wherein the source of phosphate ions comprises phosphoric acid.
  • Aspect 20 The metal can of Aspects 18 or 19, wherein the source of phosphate ions is in an amount of 2 ppm to 300 ppm.
  • Aspect 21 The metal can of Aspects 14 to 20, wherein the conversion coating composition further comprises a source of free fluoride.
  • Aspect 22 The metal can of Aspect 21, wherein the source of free fluoride comprises hydrofluorosilicic acid and fluoboric acid.
  • Aspect 23 The metal can of Aspects 21 or 22, wherein the source of free fluoride is in an amount of 5 ppm to 300 ppm.
  • Aspect 24 The metal can of Aspects 14 to 23, wherein the Group IVB metal comprises a source of free fluoride.
  • Aspect 25 The metal can of Aspects 14 to 24, wherein the conversion coating composition further comprises an electropositive metal.
  • Aspect 26 The metal can of Aspect 25, wherein the electropositive metal is in an amount of 2 ppm to 150 ppm, based on a total weight of the ingredients in the conversion coating composition.
  • Aspect 27 The metal can of Aspect 25 or 26, wherein the electropositive metal comprises copper nitrate.
  • a method of packaging a hydrogen sulfide producing liquid in a metal can comprising depositing the hydrogen sulfide producing liquid inside the metal can, wherein the metal can comprises a conversion coating layer deposited on at least a portion of the inside surface of the metal can, wherein the conversion coating layer comprises a lanthanide series element, a Group VIB metal, a Group IIIB metal, and/or a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous- containing monomeric subunit ml and optionally a non -phosphorous- containing monomeric subunit m2; and a film-forming layer deposited on at least a portion of the conversion coating layer.
  • Aspect 29 The method of Aspect 28, wherein the conversion coating layer is formed by a conversion coating composition comprising the lanthanide series element, the Group VIB metal, the Group IIIB metal, the Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non- phosphorous-containing monomeric subunit m2.
  • Aspect 30 The method of Aspect 29, wherein the conversion coating composition comprises an electropositive metal, a source of phosphate ions, and/or a source of free fluoride.
  • Aspect 31 The method of Aspect 29, wherein the Group IVB metal comprises hexafluorozirconic acid.
  • Aspect 32 The method of Aspect 30, wherein the source of phosphate ions comprises phosphoric acid.
  • Aspect 33 The method of Aspects 30 or 32, wherein the source of phosphate ions is in an amount of 2 ppm to 300 ppm.
  • Aspect 34 The method of Aspect 30, wherein the source of free fluoride comprises hydrofluorosilicic acid and fluoboric acid.
  • Aspect 35 The method of Aspects 30 or 34, wherein the source of free fluoride is in an amount of 5 ppm to 300 ppm.
  • Aspect 36 The method of Aspects 28 to 35, wherein the Group IVB metal comprises a source of free fluoride.
  • Aspect 37 The method of Aspect 30, wherein the electropositive metal is in an amount of 2 ppm to 150 ppm, based on a total weight of the ingredients in the conversion coating composition.
  • Aspect 38 The method of Aspect 30 or 37, wherein the electropositive metal comprises copper nitrate.
  • a metal can comprising a conversion coating layer deposited on at least a portion of an internal surface of the metal can, the conversion coating layer comprising a lanthanide series element, a Group VIB metal, Group MB metal, a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non-phosphorous-containing monomeric subunit m2; a film forming layer deposited on at least a portion of the conversion coating layer; and a hydrogen sulfide producing liquid inside the metal can, wherein the hydrogen sulfide producing liquid exhibits a hydrogen sulfide concentration of less than 35 ppb as measured by a gas detection tube for at least two months after the metal can is sealed.
  • Aspect 40 The metal can of Aspect 39, wherein the metal can comprises aluminum, aluminum alloy, and/or steel.
  • Aspect 41 The metal can of Aspect 40, wherein the metal can comprises aluminum alloy.
  • the metal can of Aspects 39 to 41, wherein the lanthanide series element comprises lanthanum and/or cerium, the Group VIB metal comprises chromium and/or molybdenum, Group IIIB metal comprises yttrium, and the Group IVB metal comprises zirconium, titanium, and/or hafnium.
  • Aspect 43 The metal can of Aspects 39 to 42, wherein the Group IVB metal comprises zirconium.
  • the metal can of Aspect 42, wherein the chromium comprises chromium (III) and/or chromium (VI).
  • the metal can of Aspects 39 to 44, wherein the hydrogen sulfide producing liquid deposited in the metal can comprises wine, beer, fruit juice, vinegar, cordial, coconut milk, soft drink, cider, kombucha, or mead.
  • Aspect 46 The metal can of Aspects 39 to 45, wherein the average thickness of the conversion coating layer on the metal can is 0.001 msi to 0.05 msi as measured by ICP-OES.
  • Aspect 47 The metal can of Aspects 39 to 46, wherein the film forming layer comprises an acrylic, a polyester, a phenolic, a polyolefin, and/or an epoxy.
  • Aspect 48 The metal can of Aspects 39 to 47, wherein the film forming layer has a thickness of 1 msi to 4 msi as measured by a SENCON SI9600 Coating Thickness Gauge.
  • Aspect 49 The metal can of Aspects 39 to 48, wherein the conversion coating layer is on at least a portion of a can body of the metal can.
  • Aspect 50 The metal can of Aspects 39 to 49, wherein the conversion coating layer is on at least a portion of a can end of the metal can.
  • a system for treating a metal for packaging a hydrogen sulfide producing liquid, the system comprising a conversion coating layer deposited on at least a portion of the inside surface of the metal can, wherein the conversion coating layer comprises a lanthanide series element, a Group VIB metal, a Group IIIB metal, a Group IVB metal, and/or a homopolymer or copolymer comprising a phosphorous-containing monomeric subunit ml and optionally a non-phosphorous-containing monomeric subunit m2; and a film-forming layer deposited on at least a portion of the conversion coating layer.
  • Aspect 52 The metal can of Aspect 51, wherein the metal can comprises aluminum, aluminum alloy, and/or steel.
  • Aspect 53 The metal can of Aspect 52, wherein the metal can comprises aluminum alloy.
  • Aspect 54 The metal can of Aspects 51 to 53, wherein the metal can further comprises a hydrogen sulfide producing liquid deposited inside the metal can.
  • Aspect 55 The metal can of Aspects 51 to 54, wherein the conversion coating layer comprises zirconium.
  • Aspect 56 The metal can of Aspect 51, wherein the chromium comprises chromium (III) and/or chromium (VI).
  • the metal can of Aspects 54 to 56, wherein the hydrogen sulfide producing liquid deposited in the metal can comprises wine, beer, fruit juice, vinegar, cordial, coconut milk, soft drinks, cider, kombucha, or mead.
  • Aspect 58 The metal can of Aspects 51 to 57, wherein the average thickness of the conversion coating layer on the metal can is 0.001 msi to 0.05 msi as measured by ICP-OES.
  • Aspect 59 The metal can of Aspects 51 to 58, wherein the film forming layer comprises an acrylic, a polyester, a phenolic, a polyolefin, and/or an epoxy.
  • Aspect 60 The metal can of Aspects 51 to 59, wherein the film forming layer has a thickness of 1 msi to 4 msi as measured by a SENCON SI9600 Coating Thickness Gauge.
  • Aspect 61 The metal can of Aspects 51 to 60, wherein the conversion coating layer is on at least a portion of a can body of the metal can.
  • Aspect 62. The metal can of Aspects 51 to 61, wherein the conversion coating layer is on at least a portion of a can end of the metal can.
  • stage 2 where the alkaline etchant was removed via a low pH acid rinse with rows of flood nozzles, followed by stage 3 of a city water rinse to remove the acid.
  • stage 4 hollowcone nozzles sprayed the acidic zirconium conversion coating composition set forth in Table 1, which deposits a thin layer of zirconium oxyhydroxide on the panel surface.
  • stage 5 the panels are rinsed with deionized water, before being dried with infrared (IR) heaters.
  • IR infrared
  • the second set of panels did not receive any pre-treatment.
  • a commercial internal varnish an acrylic latex lacquer sold commercially by PPG Industries, Inc. under the tradename PPG Innovel® 2012-823, was applied to both sets of panels by drawing down the wet coating using a number # 20 wire bar.
  • the coated substrate panels were baked at 193°C for three minutes.
  • the cured film had a nominal thickness of 4-5 mg/in2 as determined by a SENCON SI9600 Coating Thickness Gauge.
  • the prepared panels were tested for 3 ⁇ 4S gas production in wine by placing the panels in Sieg-mi-flex extraction cells (LABC-Labortechnik, Germany), such that 1 dm 2 of panel was in contact with 100 mL of wine.
  • the cells were then filled with wine (pH 3.3) (sold by Barefoot Cellars under the tradename Barefoot® Refresh® Crisp White Spritzer, USA) spiked with 50 ppm sodium metabisulfite and held at 50°C in a hot room for 10 days (representative of 2-3 months on the shelf at room temperature).
  • the cells were removed from the hot room, allowed to cool to room temperature, and then the concentration of 3 ⁇ 4S was determined by sparging the wine and measuring the effluent with a gas detection tube (Gastec 4LT, Japan) that was previously calibrated against sodium sulfide in wine. After measuring the samples in triplicate, the wine in contact with the pre-treated panels had an average 3 ⁇ 4S concentration of 23 ppb and the non-pre-treated panels had an 3 ⁇ 4S concentration of 40 ppb.
  • a gas detection tube Gastec 4LT, Japan

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
  • Chemical Treatment Of Metals (AREA)
EP21717743.5A 2020-03-24 2021-03-23 Konversionsbeschichtung für schwefelwasserstoff produzierende flüssigkeiten enthaltende dosen Pending EP4127263A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202062994080P 2020-03-24 2020-03-24
PCT/US2021/023783 WO2021195152A1 (en) 2020-03-24 2021-03-23 Conversion coating for cans containing hydrogen sulfide producing liquids

Publications (1)

Publication Number Publication Date
EP4127263A1 true EP4127263A1 (de) 2023-02-08

Family

ID=75439588

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21717743.5A Pending EP4127263A1 (de) 2020-03-24 2021-03-23 Konversionsbeschichtung für schwefelwasserstoff produzierende flüssigkeiten enthaltende dosen

Country Status (4)

Country Link
US (1) US20230107608A1 (de)
EP (1) EP4127263A1 (de)
CN (1) CN115315540A (de)
WO (1) WO2021195152A1 (de)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1333043C (en) * 1988-02-15 1994-11-15 Nippon Paint Co., Ltd. Surface treatment chemical and bath for aluminium and its alloy
CA2410321C (en) * 2000-05-31 2012-02-21 Chemetall Gmbh Method for treating or pretreating containers
WO2010013655A1 (ja) * 2008-07-30 2010-02-04 東洋製罐株式会社 水性塗料から成る塗膜が形成されたアルミニウム製蓋
US20100316881A1 (en) * 2009-06-16 2010-12-16 Kaylo Alan J Method of reducing mapping of an electrodepositable coating layer
DE102012220384A1 (de) * 2012-11-08 2014-05-08 Henkel Ag & Co. Kgaa Dosenvorbehandlung zur verbesserten Lackhaftung
DE102012223355A1 (de) * 2012-12-17 2014-06-18 Henkel Ag & Co. Kgaa Hochvernetzende Lackformulierung für Doseninnenflächen
TWI712644B (zh) * 2015-03-27 2020-12-11 日商東洋製罐集團控股股份有限公司 有機樹脂被覆表面處理金屬板
KR20180008770A (ko) * 2015-05-21 2018-01-24 도요세이칸 그룹 홀딩스 가부시키가이샤 표면 처리 금속판 및 유기 수지 피복 표면 처리 금속판
US10113070B2 (en) * 2015-11-04 2018-10-30 Ppg Industries Ohio, Inc. Pretreatment compositions and methods of treating a substrate
JP7355485B2 (ja) * 2018-02-02 2023-10-03 東洋製罐株式会社 ワイン用アルミニウム製容器

Also Published As

Publication number Publication date
WO2021195152A1 (en) 2021-09-30
US20230107608A1 (en) 2023-04-06
CN115315540A (zh) 2022-11-08

Similar Documents

Publication Publication Date Title
US7510612B2 (en) Chemical conversion coating agent and surface-treated metal
KR101431942B1 (ko) 용기용 강판의 제조 방법
US5294266A (en) Process for a passivating postrinsing of conversion layers
US5441580A (en) Hydrophilic coatings for aluminum
CN102828173B (zh) 金属表面处理用组成物、金属表面处理方法以及金属材料
EP1433877B1 (de) Verfahren zur Vorbehandlung vor der Beschichtung
KR101185997B1 (ko) 철강재료의 도장 하지용 화성처리액 및 처리방법
MXPA05006156A (es) Solucion para tratamiento de superficie de metal y un metodo para tratamiento de superficie.
RU2593248C2 (ru) Способ пассивирования белой жести
JP4276530B2 (ja) 化成処理剤及び表面処理金属
US10011915B2 (en) Multistage pretreatment of tinplate prior to the coating thereof with lacquer
US9580812B2 (en) Chemical conversion treatment agent for surface treatment of metal substrate, and surface treatment method of metal substrate using same
US4422886A (en) Surface treatment for aluminum and aluminum alloys
US5296052A (en) Surface treatment chemicals and bath for aluminum or its alloy and surface treatment method
JPH04276087A (ja) 化成層の後洗い方法
JP2003155578A (ja) 鉄及び／又は亜鉛系基材用化成処理剤
CA2109057A1 (en) Treatment for galvanized metal
US4391652A (en) Surface treatment for aluminum and aluminum alloys
CA2041891C (en) Process of aftertreating conversion layers
WO2021195152A1 (en) Conversion coating for cans containing hydrogen sulfide producing liquids
US20030196728A1 (en) Nonchromate metallic surface-treating agent, nonchromate metallic surface-treating method, and aluminum or aluminum alloy
US20130192995A1 (en) Pretreatment of tinplate prior to the coating thereof with lacquer
US20040115448A1 (en) Corrosion resistant magnesium and magnesium alloy and method of producing same
JP2003313680A (ja) ノンクロム金属表面処理剤、ノンクロム金属表面処理方法、及び、アルミニウム又はアルミニウム合金板
JP6553936B2 (ja) 包装容器用アルミニウム合金板の製造方法

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20221019

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230526