WO2014095904A1 - Verfahren zur herstellung beschichteter dosendeckel - Google Patents
Verfahren zur herstellung beschichteter dosendeckel Download PDFInfo
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- WO2014095904A1 WO2014095904A1 PCT/EP2013/076954 EP2013076954W WO2014095904A1 WO 2014095904 A1 WO2014095904 A1 WO 2014095904A1 EP 2013076954 W EP2013076954 W EP 2013076954W WO 2014095904 A1 WO2014095904 A1 WO 2014095904A1
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- copolymer
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- weight
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- paint
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
- B05D7/16—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies using synthetic lacquers or varnishes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D123/04—Homopolymers or copolymers of ethene
- C09D123/08—Copolymers of ethene
- C09D123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C09D123/0869—Acids or derivatives thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D123/04—Homopolymers or copolymers of ethene
- C09D123/08—Copolymers of ethene
- C09D123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C09D123/0869—Acids or derivatives thereof
- C09D123/0876—Neutralised polymers, i.e. ionomers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/02—Emulsion paints including aerosols
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/20—Metallic substrate based on light metals
- B05D2202/25—Metallic substrate based on light metals based on Al
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2252/00—Sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2252/00—Sheets
- B05D2252/02—Sheets of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2252/00—Sheets
- B05D2252/04—Sheets of definite length in a continuous process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2252/00—Sheets
- B05D2252/10—Applying the material on both sides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2401/00—Form of the coating product, e.g. solution, water dispersion, powders or the like
- B05D2401/20—Aqueous dispersion or solution
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2503/00—Polyurethanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2508/00—Polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2701/00—Coatings being able to withstand changes in the shape of the substrate or to withstand welding
- B05D2701/10—Coatings being able to withstand changes in the shape of the substrate or to withstand welding withstanding draw and redraw process, punching
Definitions
- the present invention relates to a process for producing coated can ends made of aluminum strip and based on the finding that when using water-based paints containing a copolymer or a copolymer mixture of at least one aliphatic and acyclic alkene having at least one ⁇ , ⁇ -unsaturated
- Embodiment of the method can be completely dispensed with the application of a Lackhaftgrundes when used as a hardener system water-soluble compounds of the elements Zr and / or Ti in the paint.
- Coating of aluminum surfaces known in which typically first a Lackhaft ground and then an organic lacquer layer are applied.
- the application of a paint adhesion base via a conversion coating is usually necessary to minimize the corrosive delamination of the paint layer.
- high quality standards are also placed on the coating of the outer packaging, in order to ensure that no contamination of the food occurs via corrosive entry of metals or via delamination and abrasion of paint particles. The requirements for the paint adhesion of the applied
- Coating are in particular for the production of can lids
- WO 04/053183 describes the chromium-free pretreatment of aluminum for the production of coated can lids before coating with an organic lacquer.
- the pretreatment is based on an acidic aqueous composition containing fluorocomplexes, for example of the elements Zr and / or Ti, and an organic
- Carboxylic acid with hydroxyl groups and polyvinyphenol derivatives According to this specification, Carboxylic acid with hydroxyl groups and polyvinyphenol derivatives. According to this specification, Carboxylic acid with hydroxyl groups and polyvinyphenol derivatives. According to this specification, Carboxylic acid with hydroxyl groups and polyvinyphenol derivatives. According to this specification, Carboxylic acid with hydroxyl groups and polyvinyphenol derivatives. According to this
- EP 2505625 discloses a water-based can interior lacquer comprising a copolymer or a copolymer mixture of at least one aliphatic and acyclic alkene with at least one ⁇ , ⁇ -unsaturated carboxylic acid in water-dispersed form, wherein the acid number of the copolymer or the copolymer mixture at least 20 mg KOH / g, however not more than 200 mg KOH / g, and at least one
- water-dispersed or water-soluble hardener selected from the group of
- Copolymer mixture is at least 20 mg KOH / g, but not more than 200 mg KOH / g and the acid groups of the copolymer or the
- Copolymer mixture in water-dispersed form at least 20%, but not more than 60% neutralized, and
- dispersed polymeric constituents of the water-based paint have a D50 value of less than 1 ⁇ .
- aluminum strip denotes a flat product of aluminum or of an aluminum alloy, wherein the flat product may be in the form of a sheet or as a quasi-continuous strip unwound from a coil.
- a water-based lacquer comprises a dispersion and / or emulsion of organic polymers in a continuous aqueous phase, an aqueous phase in the context of the present invention also being understood to mean a homogeneous mixture of water and a water-miscible solvent.
- a water-dispersed form thus means that the respective polymer in the
- mixtures of chemically and / or structurally different copolymers of at least one aliphatic and acyclic alkene with at least one ⁇ , ⁇ -unsaturated carboxylic acid are considered as copolymer mixtures. So can in one
- Copolymer blend of a paint formulation according to the invention for example
- the acid number is according to the invention an experimentally determined index, which is a measure of the number of free acid groups in the copolymer or in the
- Copolymer mixture is.
- the acid value is determined by dissolving a weighed amount of the copolymer or copolymer mixture in a solvent mixture of methanol and distilled water in the volume ratio 3: 1 and then with 0.05 mol / l KOH is titrated potentiometrically in methanol.
- the potentiometric measurement is made with a combination electrode (LL-Solvotrode ® from Metrohm; reference electrolyte. 0.4 mol / l of tetraethylammonium bromide in ethylene glycol).
- the acid number corresponds to the added amount of KOH in milligrams per gram of copolymer or
- Copolymer blend at the inflection point of the potentiometric titration curve.
- the D50 value indicates that 50% by volume of the dispersed polymeric constituents of the
- Can interior paint have a size below the specified value.
- the D50 value can be determined from volume-weighted cumulative particle size distributions, with the skilled person corresponding dynamic light scattering methods are known, with the help of the particle size distribution curve can be measured.
- the hardener of the varnish in the process according to the invention must possess the property, only at temperatures above the glass transition temperature, preferably only above 100 ° C., with the copolymer or the copolymer mixture
- Suitable hardener systems are both water-soluble organic and water-soluble inorganic hardeners.
- Organic hardeners are water-soluble in the sense of the present invention, if their solubility in deionized water at 20 ° C in each case at least 5 g / l.
- Particularly suitable water-soluble organic hardeners in paints of the process according to the invention are aminoplast hardeners which are based on melamine, urea, dicyandiamide, guanamine and / or guanidine. Particular preference is given to melamine-formaldehyde resins as aminoplast curing agents having a molar ratio of formaldehyde: melamine, which is preferably greater than 1.5.
- the water-soluble organic hardener of the lacquer is
- they are preferably polyfunctional having a diimide equivalent weight in the range of 300-500 grams of the polyfunctional compound per mole of diimide groups.
- carbodiimides are preferred, consisting of isocyanates having at least two isocyanate groups
- aromatic, aliphatic or alicyclic radical having not more than 16 carbon atoms
- the isocyanate groups are preferably blocked with hydrophilic protecting groups which, as such, impart improved water dispersibility or solubility to the carbodiimide.
- hydrophilic protecting groups which, as such, impart improved water dispersibility or solubility to the carbodiimide.
- Can interior lacquer containing as hardener at least partially carbodiimides the proportion of organic solvents is therefore below 10 wt .-%, more preferably below 4 wt .-%, particularly preferably contains the can interior lacquer no solvent.
- Suitable protecting groups of hydrophilic character are, for example
- the hardener of the paint is thus selected from carbodiimides having blocked terminal isocyanate groups according to the general structural formula (II):
- n whole natural number in the range of 1 to 20;
- R-i aromatic, aliphatic or alicyclic radical of not more than 16
- Preferred diisocyanates which give the corresponding carbodiimides by decarboxylation are, for example, hexamethylene diisocyanate, cyclohexane-1,4-diisocyanate,
- Methylcyclohexane diisocyanate and tetramethylxylylene diisocyanate 1, 5-naphthylene diisocyanate, 4,4-diphenylmethane diisocyanate, 4,4-diphenyldimethylmethane diisocyanate,
- the water-soluble organic hardener of the lacquer is
- an organic polymer or copolymer having hydroxyl groups, but not based on aromatic epoxides preferably a polymer and / or the copolymer of vinyl alcohol, wherein the hydroxyl value of the organic polymers or copolymers is preferably at least 100 mg KOH / g.
- Such polymers may undergo etherification reactions with the carboxyl groups of the copolymer or of the copolymer mixture according to component a) at the stoving temperature of the lacquer and thus bring about crosslinking of the binder.
- the proportion by weight of these polymers and / or copolymers based on the weight fraction of the copolymer or the copolymer mixture according to component a) of the paint in a preferred process is not more than 20%.
- the hydroxyl number is a measure of the number of free hydroxyl groups in the polymer or in a polymer mixture and is determined experimentally by potentiometric titration.
- a weighed amount of the polymer or the polymer mixture in a reaction solution of 0, 1 mol / l phthalic anhydride in pyridine is heated at 130 ° C for 45 minutes and first with 1, 5 times the volume of the reaction solution of pyridine and then with the 1, 5 times the volume of the reaction solution of deionized water ( ⁇ ⁇ 1 ⁇ - ⁇ ).
- the liberated amount of phthalic acid is titrated in this mixture by means of 1 M sodium hydroxide solution.
- the potentiometric measurement is made with a combination electrode (LL-Solvotrode ® from Metrohm; reference electrolyte. 0.4 mol / l of tetraethylammonium bromide in ethylene glycol).
- the hydroxyl number corresponds to the added amount of NaOH per gram of polymer or polymer mixture at the inflection point of the potentiometric
- water-soluble organic hardeners it is preferred in the case of water-soluble organic hardeners if they have a weight-average molecular weight M w of not more than 2,500 ⁇ , particularly preferably not more than 1,500 ⁇ , in order to ensure adequate crosslinking with the copolymer or copolymer mixture.
- a hardener system of the paint which is alternative to the organic hardener is based on water-soluble inorganic compounds of the elements Zr and / or Ti.
- Such inorganic compounds are water-soluble in the sense of the present invention, if their solubility in deionized water ( ⁇ ⁇ 1 ⁇ 8 ⁇ 1 ) at 20 ° C in each case at least 1 g / l based on the respective element Zr and / or Ti.
- Preferred representatives of these water-soluble inorganic hardeners are selected from alkoxides and / or carbonates, particularly preferably from tetrabutoxyzirconate,
- the weight fraction of the inorganic curing agent based on water-soluble inorganic compounds of the elements Zr and / or Ti determined as weight fraction of the elements Zr and / or Ti based on the solids content of the copolymer or the copolymer mixture according to component a) divided by the dimensionless acid number of the copolymer or
- this weight ratio divided by the dimensionless acid number of the copolymer or the copolymer mixture according to component a) in grams KOH / g is preferably less than 0.12-X Zr + 0.06-X T i to stable paint formulations receive.
- X Zr and ⁇ ⁇ are the respective mass fractions of the elements Zr or Ti of the hardener according to component b) based on the total content of the elements Zr and Ti of the hardener.
- inorganic hardeners of water-soluble inorganic compounds of the elements Zr and / or Ti have organic hardeners which contain amino groups, imine groups or carbodiimide groups and are usually suitable for good crosslinking in one Weight fraction above 20%, based on component a) of the paint are contained, can be completely dispensed with.
- copolymer or copolymer mixture of the aliphatic and acyclic alkene with an ⁇ , ⁇ -unsaturated carboxylic acid having the predetermined acid number already exhibits good paint adhesion and high flexibility, particularly on surfaces of aluminum.
- mediate the mediate
- the proportion by weight of the aliphatic and acyclic alkenes in the copolymer or in the copolymer mixture is preferably at least 40% by weight, more preferably at least 60% by weight, but preferably not more than 95% by weight. This ensures that the permeability of the cured on the aluminum strip lacquer for ions and the swelling of the same when in contact with aqueous media at the same time sufficient wettability and adhesion of the lacquer to the can material is maximally reduced. This is particularly advantageous if the aluminum strip is coated on both sides with the lacquer, so that the can lid produced in accordance with the invention can be produced on the inside with the contents filled therein after the can has been manufactured
- Liquid is in contact.
- Copolymers or the copolymer mixture are selected from ethene, propene, 1-butene, 2-butene, isobutene, 1, 3-butadiene and / or 2-methylbuta-1, 3-diene, more preferably ethene.
- Preferred ⁇ , ⁇ -unsaturated carboxylic acids of the copolymers according to the invention or the copolymer mixture are selected from cinnamic acid, crotonic acid, fumaric acid, itaconic acid, maleic acid, acrylic acid and / or methacrylic acid, more preferably acrylic acid and / or methacrylic acid, especially acrylic acid.
- Further comonomers which may be additional constituents of the copolymers or copolymer mixture in a can interior lacquer according to the invention, are selected from esters of .alpha.,. Beta.-unsaturated carboxylic acids, preferably linear or branched
- Alkyl esters of acrylic acid and / or methacrylic acid having not more than 12 carbon atoms in the aliphatic radical Such comonomers improve the adhesion and at the same time the flexibility of the cured paint on metal surfaces due to an increased
- copolymers or copolymer blends which additionally contain the comonomers described above with acid numbers below 100 mg KOH / g, in particular below 60 mg KOH / g, are preferred in the process according to the invention.
- the copolymer or copolymer mixture of the paint preferably contains less than 0.05% by weight, more preferably less than 0.01% by weight, of epoxide
- copolymers or copolymer mixtures which as such have a glass transition temperature of not more than 80 ° C, more preferably not more than 60 ° C. Usually have copolymers or
- Copolymer blends composed of alkenes and ⁇ , ⁇ -unsaturated
- Carboxylic acids having a weight average molecular weight M w of not more than 20,000 u glass transition temperatures well below 100 ° C, so that copolymers or copolymer blends having a weight average molecular weight of not more than 20,000 u, especially not more than 15,000 u in paints of the inventive method are.
- the acid groups of the water-dispersed copolymer or of the copolymer mixture dispersed in water according to component a) are at least partially neutralized. This measure increases the ability of the copolymers to self-emulsify in the aqueous phase, resulting in more stable paint formulations with smaller particle sizes of the dispersed copolymers. Accordingly, the paint in the inventive
- Process preferably additionally a neutralizing agent.
- Suitable neutralizing agents which are additionally contained in such a preferred paint formulation are preferably ammonia, amines, metallic aluminum and / or zinc, preferably in powder form, and water-soluble oxides and hydroxides of the elements Li, Na, K, Mg, Ca, Fe ( II) and Sn (II).
- the person skilled in the art is aware at this point that the neutralizing agents enter into neutralization reactions in accordance with their function with the constituents of the lacquer and therefore are preferred as such in these
- formulations are detectable only indirectly in the form of their reaction products.
- metallic aluminum or zinc powder in the aqueous phase of the varnish reacts with evolution of hydrogen to form the corresponding hydroxides, which in turn neutralize acid groups of the copolymer or the
- neutralizing agents are ammonia and amines, since these go on curing of the paint at elevated temperature in the gas phase and thus do not remain in the cured paint.
- Preferred amines which can be used as neutralizing agents in paints of the process according to the invention are morpholine, hydrazine, hydroxylamine, monoethanolamine, diethanolamine, triethanolamine,
- the neutralization of the acid groups of the copolymer or of the copolymer mixture in paints of the process according to the invention is preferably carried out to such an extent that at least 20%, more preferably at least 30%, of the acid groups are neutralized.
- High degrees of neutralization above 50%, preferably above 40%, are to be avoided in a preferred embodiment of the paints of the process according to the invention, since the almost completely neutralized copolymers are already dissolved in water in significant amounts and thus not dispersed, which results in a high viscosity of the Lackes, so that such formulations because of their rheological
- the neutralizing agent to the paint in such an amount that based on 1 g of the copolymer or the copolymer mixture at least 4 / z ⁇ , preferably at least 6 / z ⁇ each multiplied by the acid number of the copolymer or the copolymer mixture
- Neutralizing agent are included, but preferably not more than 10 / z ⁇ , more preferably not more than 8 / z ⁇ , multiplied by the acid number of the copolymer or the copolymer mixture.
- the divisor z is a natural number and corresponds to the equivalent number of the neutralization reaction. The equivalent number indicates how many moles of acid groups of the copolymer or the copolymer mixture one mole of
- the dispersed polymeric components of the water-based paint have a
- a coarser dispersion of the polymeric constituents, in particular of the copolymers or of the copolymer mixture according to component a) of the present invention impedes homogeneous crosslinking since permeation of the water-soluble curing agent with the water-dispersed polymeric constituent according to component a) can only take place to a very limited extent.
- Preferred in this connection is such a dispersion of the polymeric constituents in which a D50 value of less than 0.5 ⁇ m has been realized.
- the viscosity of the paint increases even more finely divided
- Dispersion of the polymeric components so that the D50 value preferably does not fall below 0, 1 ⁇ , in order to continue to ensure easy application of the paint can.
- a particularly preferred lacquer in the process according to the invention contains at least 40% by weight of water and
- emulsifiers selected from nonionic amphiphiles having an HLB value of at least 8; e) not more than 10% by weight, preferably not more than 5% by weight, of water-miscible organic solvents;
- wetting agents selected from wetting agents, leveling agents, defoamers, catalysts,
- the strip is first cleaned of aluminum strip and then applied - with or without intervening rinsing step - the paint on the aluminum strip.
- the application of the paint is preferably carried out on both sides, so that after Austanzen and forming the coated strip material to the can lid no further coating with a paint is necessary.
- the cured paint has excellent flexibility and paint adhesion, so that in the process according to the invention, the forming of the stamped aluminum tape parts to the can lid causes no Lackabplatzept or paint damage that would otherwise expose the inner surfaces of the finished cans with bottled liquids delamination of the coating and thus an undesirable entry of Lack components in the medium can bring about.
- the paint adhesion is when using inorganic hardeners based on water-soluble compounds of the elements Zr and / or Ti such that the cleaned aluminum strip in a preferred process according to the invention prior to the application of the paint no such
- a wet chemical treatment step which causes a conversion coating with a coating weight of at least 5 mg / m 2 based on such metal elements, which are not components of the can material.
- no wet-chemical treatment steps with chromium-free aqueous compositions comprising water-soluble compounds of the elements Zr, Ti and / or Si and preferably less than 0.1% by weight of organic polymers.
- a cleaning of the aluminum strip prior to the application of the paint is used according to the invention to provide a largely free of organic constituents metallic surface and is preferably carried out in the surface treatment of aluminum known alkaline to neutral aqueous cleaners.
- the paint is preferably in a
- Dry layer coating of at least 2 g / m 2 , but preferably in one
- Dry layer coating of not more than 20 g / m 2 applied to the surface of the aluminum strip.
- the application of a wet film of the paint takes place in the process according to the invention with conventional application methods, for example by roller application or by spraying.
- the wet film of the paint on the aluminum tape is in one Drying oven at temperatures in the range of 120 ° C to 200 ° C (object temperature) cured to a paint film.
- the curing process involves the volatilization of the aqueous phase as well as the filming and crosslinking of the polymeric constituents.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201380066202.XA CN104870579B (zh) | 2012-12-17 | 2013-12-17 | 用于生产涂覆的罐盖的方法 |
CA2895433A CA2895433A1 (en) | 2012-12-17 | 2013-12-17 | Method for the production of coated can lids |
EP13811456.6A EP2931820A1 (de) | 2012-12-17 | 2013-12-17 | Verfahren zur herstellung beschichteter dosendeckel |
AU2013361729A AU2013361729B2 (en) | 2012-12-17 | 2013-12-17 | Method for the production of coated can lids |
JP2015551153A JP6243447B2 (ja) | 2012-12-17 | 2013-12-17 | コーティングされた缶蓋を製造する方法 |
KR1020157019147A KR101990178B1 (ko) | 2012-12-17 | 2013-12-17 | 코팅된 캔 뚜껑의 제조 방법 |
US14/739,202 US9889468B2 (en) | 2012-12-17 | 2015-06-15 | Method for manufacturing coated can lids |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012223356.3 | 2012-12-17 | ||
DE102012223356.3A DE102012223356A1 (de) | 2012-12-17 | 2012-12-17 | Verfahren zur Herstellung beschichteter Dosendeckel |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/739,202 Continuation US9889468B2 (en) | 2012-12-17 | 2015-06-15 | Method for manufacturing coated can lids |
Publications (1)
Publication Number | Publication Date |
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PCT/EP2013/076954 WO2014095904A1 (de) | 2012-12-17 | 2013-12-17 | Verfahren zur herstellung beschichteter dosendeckel |
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US (1) | US9889468B2 (de) |
EP (1) | EP2931820A1 (de) |
JP (1) | JP6243447B2 (de) |
KR (1) | KR101990178B1 (de) |
CN (1) | CN104870579B (de) |
AU (1) | AU2013361729B2 (de) |
CA (1) | CA2895433A1 (de) |
DE (1) | DE102012223356A1 (de) |
WO (1) | WO2014095904A1 (de) |
Families Citing this family (4)
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EP2960310B1 (de) | 2014-06-27 | 2016-08-17 | Henkel AG & Co. KGaA | Leitfähige transparente Beschichtung für starre und flexible Substrate |
DE102015208076A1 (de) * | 2015-04-30 | 2016-11-03 | Henkel Ag & Co. Kgaa | Verfahren zur Versieglung von oxidischen Schutzschichten auf Metallsubstraten |
BR112022025143A2 (pt) * | 2020-06-12 | 2022-12-27 | Swimc Llc | Composição aquosa de revestimento de tampa de lata para bebidas, artigo, e, método |
BR112022025138A2 (pt) | 2020-06-12 | 2022-12-27 | Swimc Llc | Composição aquosa de revestimento, artigo, e, método |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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EP1361248A1 (de) * | 2001-01-15 | 2003-11-12 | Unitika Ltd. | Wässrige polyolefinharzzusammensetzung |
EP2505625A1 (de) * | 2011-03-31 | 2012-10-03 | Henkel AG & Co. KGaA | Lackformulierung für Doseninnenflächen |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
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CA1054870A (en) | 1974-05-20 | 1979-05-22 | Ihab M. Hekal | Method for coating metal container body interiors with aqueous dispersed resin coating materials |
JPH11171179A (ja) * | 1997-12-12 | 1999-06-29 | Seiji Kagawa | プルトップ式缶 |
US20030059618A1 (en) | 2001-03-23 | 2003-03-27 | Hideyuke Takai | Method of producing epoxy compound, epoxy resin composition and its applications, ultraviolet rays-curable can-coating composition and method of producing coated metal can |
US6881279B2 (en) | 2002-12-11 | 2005-04-19 | Henkel Corporation | High performance non-chrome pretreatment for can-end stock aluminum |
JP4389067B2 (ja) * | 2003-08-29 | 2009-12-24 | 三井化学株式会社 | 水分散型防錆塗料用組成物 |
JP4389066B2 (ja) | 2003-08-29 | 2009-12-24 | 三井化学株式会社 | 水分散型防錆塗料用組成物 |
DE10345788A1 (de) | 2003-10-02 | 2005-04-21 | Bayer Materialscience Ag | Wässrige Beschichtungsmittel für Can Coating |
EP1584638A1 (de) | 2004-03-29 | 2005-10-12 | Imperial Chemical Industries Plc. | Beschichtungsmittel auf der Basis von modifizierten Epoxidharzen |
JP2006022127A (ja) | 2004-07-06 | 2006-01-26 | Mitsui Chemicals Inc | 水分散型防錆塗料用組成物 |
ES2565502T3 (es) | 2004-10-20 | 2016-04-05 | Valspar Sourcing, Inc. | Métodos de recubrimiento de una lata de comida o bebida |
US20060233955A1 (en) | 2005-04-14 | 2006-10-19 | Noel Smith | Process for the coating of metallic components with an aqueous organic composition |
BR112012000451B1 (pt) | 2009-07-24 | 2019-09-03 | Dow Global Technologies Llc | dispositivo recipiente revestido e método para fazer um dispositivo recipiente revestido |
CN102533057A (zh) | 2012-02-08 | 2012-07-04 | 蚌埠飞浦科技包装材料有限公司 | 一种食品罐头内壁涂料的配方及其制作工艺 |
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2012
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2013
- 2013-12-17 KR KR1020157019147A patent/KR101990178B1/ko active IP Right Grant
- 2013-12-17 EP EP13811456.6A patent/EP2931820A1/de not_active Withdrawn
- 2013-12-17 JP JP2015551153A patent/JP6243447B2/ja active Active
- 2013-12-17 CN CN201380066202.XA patent/CN104870579B/zh not_active Expired - Fee Related
- 2013-12-17 CA CA2895433A patent/CA2895433A1/en not_active Abandoned
- 2013-12-17 AU AU2013361729A patent/AU2013361729B2/en not_active Ceased
- 2013-12-17 WO PCT/EP2013/076954 patent/WO2014095904A1/de active Application Filing
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2015
- 2015-06-15 US US14/739,202 patent/US9889468B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1361248A1 (de) * | 2001-01-15 | 2003-11-12 | Unitika Ltd. | Wässrige polyolefinharzzusammensetzung |
EP2505625A1 (de) * | 2011-03-31 | 2012-10-03 | Henkel AG & Co. KGaA | Lackformulierung für Doseninnenflächen |
Also Published As
Publication number | Publication date |
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AU2013361729B2 (en) | 2016-08-25 |
JP2016512484A (ja) | 2016-04-28 |
KR101990178B1 (ko) | 2019-06-17 |
US20160038973A1 (en) | 2016-02-11 |
CN104870579A (zh) | 2015-08-26 |
EP2931820A1 (de) | 2015-10-21 |
CN104870579B (zh) | 2018-10-26 |
CA2895433A1 (en) | 2014-06-26 |
JP6243447B2 (ja) | 2017-12-06 |
US9889468B2 (en) | 2018-02-13 |
AU2013361729A1 (en) | 2015-07-09 |
KR20150097674A (ko) | 2015-08-26 |
DE102012223356A1 (de) | 2014-06-18 |
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