US20020165309A1 - Labeling paint and method for the manufacture thereof - Google Patents
Labeling paint and method for the manufacture thereof Download PDFInfo
- Publication number
- US20020165309A1 US20020165309A1 US09/943,885 US94388501A US2002165309A1 US 20020165309 A1 US20020165309 A1 US 20020165309A1 US 94388501 A US94388501 A US 94388501A US 2002165309 A1 US2002165309 A1 US 2002165309A1
- Authority
- US
- United States
- Prior art keywords
- composition
- agent
- paint
- oil
- labeling
- 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.)
- Abandoned
Links
- 239000003973 paint Substances 0.000 title claims abstract description 89
- 238000002372 labelling Methods 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title description 3
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims description 100
- 239000003795 chemical substances by application Substances 0.000 claims description 59
- 239000000839 emulsion Substances 0.000 claims description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 238000002156 mixing Methods 0.000 claims description 22
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 18
- 230000002708 enhancing effect Effects 0.000 claims description 18
- 239000011230 binding agent Substances 0.000 claims description 16
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 11
- 229920000126 latex Polymers 0.000 claims description 11
- 239000004094 surface-active agent Substances 0.000 claims description 11
- 230000009477 glass transition Effects 0.000 claims description 10
- 239000004816 latex Substances 0.000 claims description 10
- 239000000725 suspension Substances 0.000 claims description 10
- 239000003755 preservative agent Substances 0.000 claims description 9
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 8
- 239000002518 antifoaming agent Substances 0.000 claims description 8
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 8
- 238000005191 phase separation Methods 0.000 claims description 8
- 239000004408 titanium dioxide Substances 0.000 claims description 8
- 229920001577 copolymer Polymers 0.000 claims description 7
- 239000003921 oil Substances 0.000 claims description 7
- 235000019198 oils Nutrition 0.000 claims description 7
- 239000013049 sediment Substances 0.000 claims description 7
- 239000003549 soybean oil Substances 0.000 claims description 7
- 235000012424 soybean oil Nutrition 0.000 claims description 7
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 6
- 239000003945 anionic surfactant Substances 0.000 claims description 6
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 claims description 6
- 230000002335 preservative effect Effects 0.000 claims description 6
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 5
- 150000004676 glycans Chemical class 0.000 claims description 4
- 229920001282 polysaccharide Polymers 0.000 claims description 4
- 239000005017 polysaccharide Substances 0.000 claims description 4
- 235000015112 vegetable and seed oil Nutrition 0.000 claims description 4
- 239000008158 vegetable oil Substances 0.000 claims description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 3
- 235000021314 Palmitic acid Nutrition 0.000 claims description 3
- 235000021355 Stearic acid Nutrition 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 3
- 239000002480 mineral oil Substances 0.000 claims description 3
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 claims description 3
- 239000002736 nonionic surfactant Substances 0.000 claims description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 229920002545 silicone oil Polymers 0.000 claims description 3
- 239000008117 stearic acid Substances 0.000 claims description 3
- TWJNQYPJQDRXPH-UHFFFAOYSA-N 2-cyanobenzohydrazide Chemical compound NNC(=O)C1=CC=CC=C1C#N TWJNQYPJQDRXPH-UHFFFAOYSA-N 0.000 claims description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 2
- 235000021360 Myristic acid Nutrition 0.000 claims description 2
- TUNFSRHWOTWDNC-UHFFFAOYSA-N Myristic acid Natural products CCCCCCCCCCCCCC(O)=O TUNFSRHWOTWDNC-UHFFFAOYSA-N 0.000 claims description 2
- 235000019484 Rapeseed oil Nutrition 0.000 claims description 2
- 235000019485 Safflower oil Nutrition 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 235000019486 Sunflower oil Nutrition 0.000 claims description 2
- 239000004359 castor oil Substances 0.000 claims description 2
- 235000019438 castor oil Nutrition 0.000 claims description 2
- 235000005687 corn oil Nutrition 0.000 claims description 2
- 239000002285 corn oil Substances 0.000 claims description 2
- 229910021485 fumed silica Inorganic materials 0.000 claims description 2
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims description 2
- 239000000944 linseed oil Substances 0.000 claims description 2
- 235000021388 linseed oil Nutrition 0.000 claims description 2
- 235000010446 mineral oil Nutrition 0.000 claims description 2
- 239000004014 plasticizer Substances 0.000 claims description 2
- 239000003813 safflower oil Substances 0.000 claims description 2
- 235000005713 safflower oil Nutrition 0.000 claims description 2
- 239000002600 sunflower oil Substances 0.000 claims description 2
- 235000020238 sunflower seed Nutrition 0.000 claims description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims 3
- 239000007900 aqueous suspension Substances 0.000 claims 1
- 238000005507 spraying Methods 0.000 claims 1
- 239000000565 sealant Substances 0.000 description 20
- 238000009472 formulation Methods 0.000 description 19
- 239000006185 dispersion Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 239000007921 spray Substances 0.000 description 7
- 238000013019 agitation Methods 0.000 description 6
- -1 optical brighteners Substances 0.000 description 5
- DAFHKNAQFPVRKR-UHFFFAOYSA-N (3-hydroxy-2,2,4-trimethylpentyl) 2-methylpropanoate Chemical compound CC(C)C(O)C(C)(C)COC(=O)C(C)C DAFHKNAQFPVRKR-UHFFFAOYSA-N 0.000 description 4
- WNWHHMBRJJOGFJ-UHFFFAOYSA-N 16-methylheptadecan-1-ol Chemical compound CC(C)CCCCCCCCCCCCCCCO WNWHHMBRJJOGFJ-UHFFFAOYSA-N 0.000 description 4
- LXOFYPKXCSULTL-UHFFFAOYSA-N 2,4,7,9-tetramethyldec-5-yne-4,7-diol Chemical compound CC(C)CC(C)(O)C#CC(C)(O)CC(C)C LXOFYPKXCSULTL-UHFFFAOYSA-N 0.000 description 4
- GLDOVTGHNKAZLK-UHFFFAOYSA-N octadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCO GLDOVTGHNKAZLK-UHFFFAOYSA-N 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 239000002562 thickening agent Substances 0.000 description 4
- NECRQCBKTGZNMH-UHFFFAOYSA-N 3,5-dimethylhex-1-yn-3-ol Chemical compound CC(C)CC(C)(O)C#C NECRQCBKTGZNMH-UHFFFAOYSA-N 0.000 description 3
- 241001085205 Prenanthella exigua Species 0.000 description 3
- 239000003086 colorant Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- UKHVLWKBNNSRRR-TYYBGVCCSA-M quaternium-15 Chemical compound [Cl-].C1N(C2)CN3CN2C[N+]1(C/C=C/Cl)C3 UKHVLWKBNNSRRR-TYYBGVCCSA-M 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 229920002176 Pluracol® Polymers 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 150000004668 long chain fatty acids Chemical class 0.000 description 2
- 239000012860 organic pigment Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920001451 polypropylene glycol Polymers 0.000 description 2
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229940028356 diethylene glycol monobutyl ether Drugs 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- DQYBDCGIPTYXML-UHFFFAOYSA-N ethoxyethane;hydrate Chemical compound O.CCOCC DQYBDCGIPTYXML-UHFFFAOYSA-N 0.000 description 1
- PASCYLAFGHJSHW-UHFFFAOYSA-N ethyl 2-[(4-methoxyphenyl)methyl]-3-(methylamino)propanoate Chemical compound CCOC(=O)C(CNC)CC1=CC=C(OC)C=C1 PASCYLAFGHJSHW-UHFFFAOYSA-N 0.000 description 1
- 239000013020 final formulation Substances 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 1
- 239000004312 hexamethylene tetramine Substances 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 239000002198 insoluble material Substances 0.000 description 1
- GOQYKNQRPGWPLP-UHFFFAOYSA-N n-heptadecyl alcohol Natural products CCCCCCCCCCCCCCCCCO GOQYKNQRPGWPLP-UHFFFAOYSA-N 0.000 description 1
- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical compound O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920003226 polyurethane urea Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 239000012463 white pigment Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- 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
- C09D5/024—Emulsion paints including aerosols characterised by the additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
Definitions
- the present invention relates to a labeling paint composition and method for its manufacture.
- OSB oriented strandboard
- OSB units are typically subjected to a finishing process that generally includes the following three steps. First, units are transported into a booth where the four sides of the unit are sprayed with a liquid edge sealant, which dries to form a hydrophobic coating that helps to reduce edge thickness swell if the panels are exposed to rain at construction site. Quite often the liquid edge sealant is colored to visually differentiate the product in the marketplace. Then, the sealed unit is strapped to secure the bundle during shipping and storage. Finally, the sealed and strapped unit is labeled (e.g., stenciled) to designate the panel manufacturer, as well as the number, type and size of panels in the unit. Labeling is usually done in one of two ways.
- Units based on the most premium panels are often wrapped in a high-basis weight packaging paper that has a sophisticated, highly decorative label printed on the outside.
- the packaging paper serves a protective as well as a labeling function, and in some cases this combination of attributes has been worth the added cost.
- Most OSB units are not wrapped in packaging material, but are instead labeled with a relatively simple stencil and paint system.
- a stencil is placed against the side of a sealed and strapped OSB unit and paint is sprayed through the stencil onto the side of the unit.
- the stencil is composed of steel or aluminum and is designed to create images of letters, numbers, and company logos or icons on the side of the unit.
- Heating has marginally improved the dripping problems on some finishing lines, but it increases the complexity of the operation and it represents a bum hazard to the operators. Heating can also increase the strength of the bond between the paint and the metal as the paint dries.
- Convention labeling paint forms a strong bond to the metal as it dries and operators must scrape with considerable force in order to remove it. Eventually, the harsh scraping action destroys the most delicate parts of the stencil.
- the ideal labeling paint has the following attributes.
- the labeling paint is water-based and should not contain any highly toxic or hazardous components.
- the labeling paint should not exhibit any phase separation or sediment formation during storage (the ACI labeling paint exhibits gross sediment formation unless it is frequently agitated).
- the labeling paint is readily atomized in a spray system and should be resistant to nozzle clogging.
- edge sealant is still wet when the labeling paint is applied over it. Because these materials typically have sharply contrasting colors, it is important that they do not bleed into each other.
- the edge sealant generally contains a high level of waxes and it becomes very hydrophobic as it dries.
- the labeling paint must wet-out the surface of the edge sealant and develop adequate bond strength to the edge sealant as it dries.
- the labeling paint should not drip into the openings (e.g., letters or numbers) on the stencil prior to drying.
- the labeling paint should form a film as it dries and should not remain wet and sticky for very long subsequent to application.
- the labeling paint must form a very weak bond to the metal stencil in order to ensure its easy removal from the stencil.
- the labeling paint should provide an image, symbol, or icon that is visually intense and saturated even when the labeling paint is used at low application rates.
- the present invention provides a labeling paint and method for its manufacture.
- the invention provides a stable, labeling paint suitable for use on an OSB finishing line in conjunction with metal stencils.
- the labeling paint is 2 typically applied to the side of units at spread rates of about 10 to about 300 g/m .
- the labeling paint overspray that accumulates on the stencil is highly resistant to dripping and dries to form a soft film that has sufficient bond strength to the edge sealant.
- the labeling paint is easily removed from the metal stencil even after excessive drying times.
- the labeling paint is water-based and can include opacifying agents, viscosity enhancing agents, surfactants, a polymeric binding agent with a glass transition temperature that is greater than about 25° C., and a debonding agent, which is active on metal surfaces.
- a method for preparing a labeling paint is provided.
- a stable emulsion is prepared under relatively high shear conditions in a first stage.
- the emulsion includes water and a debonding agent that is active on metal surfaces.
- the emulsion is combined with a suspension under relatively low shear conditions to provide the paint.
- the suspension includes a polymeric binder having a glass transition temperature greater than about 25° C.
- the present invention provides a stable, water-based, labeling paint suitable for use on an OSB finishing line in conjunction with metal stencils.
- the paint exhibits no sediment formation or phase separation for about at least two months when stored in a closed container at a temperature of about 20° C.
- the paint can be transferred from a reservoir into a spray gun with conventional pumps and hoses. The paint will not clog nozzles even after extended stop-and-start run times.
- the paint is typically applied to the side of units of OSB at spread rates of about 10 to about 300 g/m 2 , and at these spread rates it does not bleed excessively into previously applied wet edge sealant.
- the paint adequately wets-out the surface of previously applied edge sealant and forms a bond with the edge sealant that is sufficient for normal field conditions.
- the paint is highly resistant to dripping on the stencil, and it is easily removed from the stencil even after excessive drying times of about 24 hours.
- the labeling paint is water-based and contains coloring and/or opacifying agents at a combined level of about 0.5 to about 35% by weight of the formulation; viscosity enhancing agents at a level of about 0.5 to about 10% by weight of the formulation; surfactants at a level of about 0.5 to about 5% by weight of the formulation; a polymeric binding agent at a level of about 3 to about 30% by weight of the formulation; and a debonding agent, which is active on metal surfaces, at a level of about 10 to about 50 % by weight of the formulation.
- the paint can also contain preservatives, optical brighteners, plasticizers, dispersing aids, coalescing agents, and defoaming agents.
- Titanium dioxide is a suitable opacifying agent.
- Viscosity enhancing agents are exemplified by soluble nonionic polysaccharides, such as hydroxyethylcellulose or carboxymethylcellulose.
- suspended particle-type viscosity enhancing agents such as fumed silica, may also be used in this invention.
- Nonionic and anionic surfactants can be used in this formulation.
- a suitable anionic surfactant class is based on the salts derived from morpholine and long-chain carboxylic acids, such as stearic acid, palmitic acid, or myristic acid.
- Suitable polymeric binding agents include latices with glass transition temperatures that are greater than about 25° C.
- the polymeric binder is a latex based on a copolymer of butylacrylate and methyl methacrylate with a glass transition temperature of about 32° C. and a pH from about 8 to about 9.
- Effective debonding agents include vegetable oils such as soybean oil, corn oil, sunflower oil, castor oil, rapeseed oil, linseed oil, sunflower seed oil, or safflower oil. Soybean oil is highly preferred for its low odor, low color, availability, and low cost. Silicone oils and mineral oils can also be used as debonding agents.
- a suitable defoaming agent is a non-silicone defoaming (e.g., Surfynol DF-210 commercially available from Air Product, Allentown, Pa.).
- Suitable preservatives include a mixture of 1-(3-chloroallyl)-3,5,7-triaza-1-azoniaadamantane chloride (64%); sodium bicarbonate (33%); hexamethylenetetramine (2%), and water (1%), commercially available under the designation Dowicil 75.
- Suitable dispersing aids include acetylenic diols, for example, 2,4,7,9-tetramethyl-5-decyne-4,7-diol, commercially available under the designation Surfynol 104PA.
- Associative thickeners can also be included in the paint, including, for example, a polyether polyurethane urea solution in a mixture of water and diethylene glycol monobutyl ether, commercially available under the designation Rheolate 288.
- Suitable coalescing agents include substituted glycols, for example, 2,2,4-trimethyl-1,3-pentanediol mono(2-methylpropanoate), commercially available under the designation Texanol.
- the present invention provides a method for making a labeling paint.
- the labeling paint is made in two stages. In a first stage a stable emulsion is formed under high shear conditions.
- the emulsion includes water and a debonding agent that is active on metal surfaces.
- the emulsion includes water, one or more viscosity enhancing agents, one or more surfactants, and one or more debonding agents.
- the emulsion is combined with a suspension under relatively low shear conditions to provide the labeling paint.
- the suspension includes water and a polymeric binder having glass transition temperature (Tg) greater than about 25° C.
- Tg glass transition temperature
- the suspension includes water, one or more polymeric binders, and one or more opacifying agents.
- the method of the invention involves an initial step in which a stable emulsion is produced using mixing equipment that provides a relatively high shearing action.
- the emulsion includes water, a viscosity enhancing agent, a surfactant and a debonding additive that is active on metal surfaces.
- Other compounds that can also be incorporated into the emulsion include preservatives, defoaming agents, and stabilizers.
- Suitable viscosity enhancing agents include nonionic polysaccharides, such as hydroxyethylcellulose and carboxymethylcellulose.
- Nonionic and anionic surfactants can also be used for this invention.
- the emulsion includes an anionic surfactant that is based on a long-chain fatty acid and an amine, such as morpholine or triethanolamine.
- Suitable debonding agents include vegetable oils, such as soybean oil, and those noted above. Silicone oil or mineral oil or mixtures of oils can also be used as debonding agents.
- Polyols and long chain alcohols such as stearyl alcohol and isostearyl alcohol, can be used to stabilize the emulsion and increase its viscosity. These alcohols may also ultimately promote the release of the labeling paint formulation from the metal stencil.
- the emulsion composition includes water (from about 38.0 to about 93.9%), a viscosity enhancing agent (from about 0.1 to about 2.0%), a surfactant (from about 1 to about 10%) and a debonding agent active on metal surfaces (from about 5.0 to about 50.0%).
- the emulsion composition includes water (from about 40.0 to about 60.0%), a viscosity enhancing agent (from about 0.2 to about 1.0%), a preservative (from about 0.01 to about 0.3%), a surfactant (from about 3.0 to about 5.0%), a debonding agent active on metal surfaces (from about 30.0 to about 45.0%), and a stabilizing agent (from about 3.0 to about 6.0%).
- the labeling paint can be made by a method having two stages: (1) emulsion formation and (2) emulsion blending.
- the emulsion can be conveniently prepared with multiple vessels. For example, in one vessel a mixture of the debonding agent and other water insoluble materials are combined. It is convenient to add long chain fatty acids and stabilizing agents to this vessel. In many cases this mixture is stirred and heated to a temperature sufficient to melt any solid components in the mixture. Once all of the materials are in a liquid state, mild agitation is sufficient to achieve a homogenous mixture. The molten mixture can be cooled to room temperature without freezing.
- an aqueous solution is prepared by agitating a mixture of water and viscosity enhancing agent. It is usually advantageous to add a preservative and an amine to this aqueous phase with additional stirring until a single-phase solution has been achieved. At this point, the aqueous phase and the debonding agent mixture can be combined. The combination provides a relatively stable emulsion with minimal agitation. The resulting combination can then be subjected to a period of high-shear mixing. For instance, it is quite appropriate to subject the mixture to a homogenizer, which applies shear to the mixture under high pressure. This results in a finely dispersed, stable emulsion with minimal froth.
- the resulting emulsion has a viscosity that is generally in the range of from about 500 to about 5000 cps and is stable with respect to phase separation.
- the emulsion so produced can be shipped to another processing center and/or stored for prolonged periods of time.
- the emulsion is blended under relatively low shear mixing conditions with a previously dispersed opacifying agent and a polymeric binder having a glass transition temperature greater than about 25° C.
- additional materials are incorporated into the formulation. These include water, defoaming agents, colorants, viscosity enhancing agents, optical brighteners, plasticizing agents, coalescing agents, dispersing aids, among other additives.
- dispersed or suspended opacifying agents include aqueous titanium dioxide suspensions or organic pigment suspensions. Typically, these suspensions are from about 40 to about 60% solids with an aqueous continuous phase. In many cases these suspensions will contain small amounts of a dispersing aid.
- a suitable polymeric binder is an acrylic latex (e.g., butylacrylate/methylmethacrylate copolymer latex) with a glass transition temperature that is greater than about 25° C. and a pH value that is between about 8-10.
- acrylic latex e.g., butylacrylate/methylmethacrylate copolymer latex
- glass transition temperature that is greater than about 25° C.
- pH value that is between about 8-10.
- Desirable colorants can be based on aqueous colored organic pigment dispersions.
- Associative thickeners can be used in this part of the formulation to increase the viscosity.
- Coalescing agents such as ethylene glycol monobutyl ether, can be used to improve the properties of the final formulation.
- the labeling paint includes the emulsion prepared as described above (from about 10.0 to about 55.0%), opacifying pigment dispersion (from about 1.0 to about 50.0%), and a polymeric binder (from about 1.0 to about 50.0%).
- the labeling paint includes the emulsion (from about 30.0 to about 45.0%), associative thickener (from about 0.1 to about 1.0%), opacifying pigment dispersion (from about 20.0 to about 40.0%), a polymeric binder (from about 10.0 to about 20.0%), and a coalescing agent (from about 5 to about 15%).
- a representative labeling paint was prepared as follows. A 200-liter primary mixing vessel was charged with warm water (50° C., 22.50 kg) and a hydroxyethylcellulose powder, known as Natrosol 250 MBR [Herculese, Inc.; Hopewell, Va.] (250 g). The components were agitated by use of a Cowles disperser (6 inch blade, 1000 rpm) for a period of 30 minutes. A 50% morpholine solution (aq) (800 g) was added to the primary mixing vessel and the contents were agitated by use of the Cowles disperser (6 inch blade, 100 rpm) for an additional five minutes.
- aq 50% morpholine solution
- a titanium dioxide powder known as Tronox CR-826 [Kerr-McGee Chemical Corp.; Oklahoma City] (17.50 kg) was added to the primary mixing vessel and the contents were agitated by use of the Cowles disperser ( 6 inch blade, 100 rpm) for an additional 30 minutes.
- a warm oil mixture (65° C., 21.00 kg) was added to the primary mixing vessel and the contents were agitated by use of the Cowles disperser (6 inch blade, 100 rpm) for an additional 10 minutes.
- the labeling paint prepared as described above had a pH value of 8, a percent solids value of 44 to 45, and a specific gravity of 1.09 to 1. 13.
- the Hegman particle size test value was 7+.
- the Brookfield viscosity value was 5000 cps at a temperature of 24° C.(RVF #7, 50 rpm).
- An aliquot of the formulation was stored without agitation in a closed container at a temperature of about 20 to about 25° C. for about two months and no sediment formation or phase separation were observed.
- the color of the formulation was bright white and the odor was slight and pleasant.
- the labeling paint described above was shipped to an OSB mill [Weyerhaeuser Co.; Grayling, Mich.] and utilized on the finishing line in place of a conventional labeling paint [High-Hide White Stencil Paint; Associated Chemists Inc.; Portland, Oreg.].
- the labeling paint required no agitation in its storage tank, as compared to the High-Hide White Stencil Paint, which required constant agitation.
- the labeling paint was easily transferred out of its storage tank to a spray gun by use of a 10:1 air motor piston pump. The labeling paint atomized properly as it exited the spray gun. Fewer nozzle clogs per day were reported with the labeling paint than typically observed with the High-Hide White Stencil Paint.
- the labeling paint did not bleed into the freshly applied green edge sealant on the side of the OSB units, but it did wet-out the surface of the freshly applied green edge sealant in a manner that was sufficient to permit bonding.
- the edge sealant being used in conjunction with the labeling paint was known as PF6014-34 [Associated Chemists Inc.; Portland, Oreg.].
- the visual contrast between the bright white images formed by the labeling paint and the dark green edge sealant as background on the side of the units was dramatic and aesthetically pleasing.
- the labeling paint that accumulated on the aluminum stencil did not drip into the lettering or logo voids. The operators were able to run the finishing line without cleaning the stencil for four hours at a time.
- a representative labeling paint was prepared as follows.
- An emulsion suitable for use in a representative labeling paint was prepared as follows. A primary mixing vessel was charged with warm water (70° C., 52.85 parts by weight) and a hydroxyethylcellulose powder, known as Natrosol 250 MBR [Herculese, Inc.; Hopewell, Va.] (0.50 parts by weight). The components were mixed with a high shear rate for a period of 20 minutes. Morpholine (1.00 parts by weight) and triethanolamine (1.00 parts by weight) were added to the primary mixing vessel and the contents were further mixed for an additional 5 minutes.
- a warm oil mixture 55° C., 44.50 parts by weight was added to the primary mixing vessel and the contents were further mixed for an additional 5 minutes.
- the emulsion had a viscosity of about 3300 cps [Brookfield, #3 spindle, 20 rpm, 20° C.] and a specific gravity of about 0.95.
- the emulsion did not exhibit any phase separation or sedimentation when stored at 20° C. for a period of 2 months.
- a second primary mixing vessel was charged with the emulsion prepared as described above (20° C.; 39.03 parts by weight) and water (0.63 parts by weight). The mixture was stirred at a low shear rate for 5 minutes.
- a defoaming agent known as Surfynol DF-210 [Air Products and Chemical Corporation; Allentown, Pa.] (0.40 parts by weight) was added to the primary vessel and the contents were stirred at a low shear rate for an additional 5 minutes.
- An associative thickening agent known as Rheolate 288 [Rheox Incorporated; Hightstown, N.J.] (0.13 parts by weight) was added to the primary vessel and the contents were stirred at a low shear rate for an additional 5 minutes.
- a titanium dioxide dispersion (27.20 parts by weight) was added to the vessel and the contents were stirred at a low shear rate for an additional 5 minutes.
- the titanium dioxide dispersion was prepared by mixing water (44.70 parts by weight), a dispersing aid known as Surfynol 104PA [Air Products and Chemical Corp.; Allentown, Pa.] (0.40 parts by weight), and titanium dioxide powder, known as Tronox CR-826 [Kerr-McGee Chemical Corp.; Oklahoma City] (54.90 parts by weight) with high shear in a secondary vessel for 30 minutes.
- An organic white pigment dispersion a dispersion of hollow polymer spheres known as Rhopaque Ultra [Rohm and Haas Co.; Philadelphia, Pa.] (6.00 parts by weight), was added to the primary vessel and the contents were stirred at a low shear rate for an additional 5 minutes.
- An aqueous latex based on an acrylic polymer with a Tg ⁇ 25 ° C., butylacrylate/methylmethacrylate copolymer latex, known as CS-4000 [Rohm and Haas Co.; Philadelphia, Pa.] (16.50 parts by weight) was added to the primary vessel and the contents were stirred at a low shear rate for an additional 5 minutes.
- a coalescing agent known as Texanol [Eastman Chemical Co.; Kingsport, TN] (10.00 parts by weight), was added to the primary vessel and the contents were stirred at a low shear rate for an additional 5 minutes.
- the resulting formulation had a pH value of 8-9, a specific gravity of 1.0-1.1.
- the Hegman particle size test value was 7+.
- the formulation had a viscosity of about 15,000 cps [Brookfield, #6 spindle, 20 rpm, 20° C.].
- An aliquot of the formulation was stored without agitation in a closed container at a temperature of 20-25° C. for 2 months and no sediment formation or phase separation were observed.
- the color of the formulation was bright white and the odor was slight and pleasant.
- the formulation was readily atomized in a conventional spray paint gun.
- the labeling paint did not bleed into freshly applied green edge sealant on the side of an OSB unit, but it did wet-out the surface of freshly applied green edge sealant in a manner that was sufficient to permit bonding.
- This formulation was very resistant to dripping on a metallic stencil and it dried to form a film that was very easily pealed or scrapped off of the metal.
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Abstract
The present invention provides a stable, labeling paint suitable for use on an OSB finishing line in conjunction with metal stencils, and a method for making the labeling paint.
Description
- This application is a continuation-in-part of copending U.S. patent application Ser. No. 09/829,508, filed Apr. 9, 2001, which claims the benefit of U.S. Patent Application No. 60/207,085, filed May 25, 2001. The benefit of the filing date of each is hereby claimed under 35 U.S.C. §§119 and 120. Each of these applications is incorporated herein by reference in its entirety
- The present invention relates to a labeling paint composition and method for its manufacture.
- Most manufacturers of oriented strandboard (OSB) panels in North America use a common practice of bundling and packaging multiple panels into units in preparation for shipment to distributors, retailers and lumberyards. Units are composed of a stack of about 40 to 100 panels. Typically the individual panels are 4 feet wide, and 8 feet or 16 feet long. Individual panel thickness values range between 0.225 inch to 1.25 inches. Most units are between 3 to 4 feet in height and so the number of panels in a unit is largely determined by the thickness of the individual panels.
- OSB units are typically subjected to a finishing process that generally includes the following three steps. First, units are transported into a booth where the four sides of the unit are sprayed with a liquid edge sealant, which dries to form a hydrophobic coating that helps to reduce edge thickness swell if the panels are exposed to rain at construction site. Quite often the liquid edge sealant is colored to visually differentiate the product in the marketplace. Then, the sealed unit is strapped to secure the bundle during shipping and storage. Finally, the sealed and strapped unit is labeled (e.g., stenciled) to designate the panel manufacturer, as well as the number, type and size of panels in the unit. Labeling is usually done in one of two ways. Units based on the most premium panels are often wrapped in a high-basis weight packaging paper that has a sophisticated, highly decorative label printed on the outside. The packaging paper serves a protective as well as a labeling function, and in some cases this combination of attributes has been worth the added cost. Most OSB units are not wrapped in packaging material, but are instead labeled with a relatively simple stencil and paint system.
- In the stencil and paint labeling system, a stencil is placed against the side of a sealed and strapped OSB unit and paint is sprayed through the stencil onto the side of the unit. Generally the stencil is composed of steel or aluminum and is designed to create images of letters, numbers, and company logos or icons on the side of the unit. Some of these designs can be a bit intricate, especially around the letters and numbers. The metal around these intricate areas generally exists as narrow, strips, which are delicate and will bend or break with excessive mechanical stress.
- Conventional labeling paint for an OSB finishing line, such as High-Hide White Stencil Paint, which is produced by Associated Chemists Inc. (ACI) [Portland, OR], has a color that sharply contrasts with the color of the edge sealant. Effective contrasting color selection of the edge sealant and stencil paint provides a visually appealing, dramatic appearance to the unit.
- Conventional labeling paints are designed to be very low in viscosity in order to improve the atomization properties of the paint at low spray pressure settings. Low spray pressure settings are generally used to minimize the amount of overspray that accumulates on the stencil. The low viscosity of conventional labeling paint makes it very prone to dripping. Accumulated overspray on the stencil often drips into some of the intricate stencil voids where it dries and occludes the opening. To cope with this dripping problem, operators on the OSB finishing line are generally forced to clean the stencil once every 20 to 25 minutes. In some cases operators apply heat to the stencil in an attempt to dry the accumulating paint before it has a chance to drip. Heating has marginally improved the dripping problems on some finishing lines, but it increases the complexity of the operation and it represents a bum hazard to the operators. Heating can also increase the strength of the bond between the paint and the metal as the paint dries. Unfortunately, conventional labeling paint forms a strong bond to the metal as it dries and operators must scrape with considerable force in order to remove it. Eventually, the harsh scraping action destroys the most delicate parts of the stencil.
- Accordingly, there exists a need for a better labeling paint for an OSB finishing line. The ideal labeling paint has the following attributes.
- Regulatory Compliance:
- The labeling paint is water-based and should not contain any highly toxic or hazardous components.
- Formulation Stability:
- The labeling paint should not exhibit any phase separation or sediment formation during storage (the ACI labeling paint exhibits gross sediment formation unless it is frequently agitated).
- Sprayability:
- The labeling paint is readily atomized in a spray system and should be resistant to nozzle clogging.
- Bleed Resistance with Edge Sealant:
- Usually, the edge sealant is still wet when the labeling paint is applied over it. Because these materials typically have sharply contrasting colors, it is important that they do not bleed into each other.
- Ability to Wet-Out Edge Sealant:
- The edge sealant generally contains a high level of waxes and it becomes very hydrophobic as it dries. The labeling paint must wet-out the surface of the edge sealant and develop adequate bond strength to the edge sealant as it dries.
- No Dripping:
- The labeling paint should not drip into the openings (e.g., letters or numbers) on the stencil prior to drying.
- Film Formation:
- The labeling paint should form a film as it dries and should not remain wet and sticky for very long subsequent to application.
- Weak Bond to Metal Stencil:
- The labeling paint must form a very weak bond to the metal stencil in order to ensure its easy removal from the stencil.
- Appearance:
- The labeling paint should provide an image, symbol, or icon that is visually intense and saturated even when the labeling paint is used at low application rates.
- The present invention provides a labeling paint and method for its manufacture.
- In one aspect, the invention provides a stable, labeling paint suitable for use on an OSB finishing line in conjunction with metal stencils. The labeling paint is2 typically applied to the side of units at spread rates of about 10 to about 300 g/m . The labeling paint overspray that accumulates on the stencil is highly resistant to dripping and dries to form a soft film that has sufficient bond strength to the edge sealant. The labeling paint is easily removed from the metal stencil even after excessive drying times. The labeling paint is water-based and can include opacifying agents, viscosity enhancing agents, surfactants, a polymeric binding agent with a glass transition temperature that is greater than about 25° C., and a debonding agent, which is active on metal surfaces.
- In another aspect of the invention, a method for preparing a labeling paint is provided. In the method, a stable emulsion is prepared under relatively high shear conditions in a first stage. The emulsion includes water and a debonding agent that is active on metal surfaces. In the second stage of the method, the emulsion is combined with a suspension under relatively low shear conditions to provide the paint. The suspension includes a polymeric binder having a glass transition temperature greater than about 25° C.
- In one aspect, the present invention provides a stable, water-based, labeling paint suitable for use on an OSB finishing line in conjunction with metal stencils. The paint exhibits no sediment formation or phase separation for about at least two months when stored in a closed container at a temperature of about 20° C. The paint can be transferred from a reservoir into a spray gun with conventional pumps and hoses. The paint will not clog nozzles even after extended stop-and-start run times. The paint is typically applied to the side of units of OSB at spread rates of about 10 to about 300 g/m2, and at these spread rates it does not bleed excessively into previously applied wet edge sealant. The paint adequately wets-out the surface of previously applied edge sealant and forms a bond with the edge sealant that is sufficient for normal field conditions. The paint is highly resistant to dripping on the stencil, and it is easily removed from the stencil even after excessive drying times of about 24 hours.
- In one embodiment, the labeling paint is water-based and contains coloring and/or opacifying agents at a combined level of about 0.5 to about 35% by weight of the formulation; viscosity enhancing agents at a level of about 0.5 to about 10% by weight of the formulation; surfactants at a level of about 0.5 to about 5% by weight of the formulation; a polymeric binding agent at a level of about 3 to about 30% by weight of the formulation; and a debonding agent, which is active on metal surfaces, at a level of about10 to about 50% by weight of the formulation. The paint can also contain preservatives, optical brighteners, plasticizers, dispersing aids, coalescing agents, and defoaming agents.
- Titanium dioxide is a suitable opacifying agent. Viscosity enhancing agents are exemplified by soluble nonionic polysaccharides, such as hydroxyethylcellulose or carboxymethylcellulose. However, suspended particle-type viscosity enhancing agents, such as fumed silica, may also be used in this invention. Nonionic and anionic surfactants can be used in this formulation. A suitable anionic surfactant class is based on the salts derived from morpholine and long-chain carboxylic acids, such as stearic acid, palmitic acid, or myristic acid. Suitable polymeric binding agents include latices with glass transition temperatures that are greater than about 25° C. In one embodiment, the polymeric binder is a latex based on a copolymer of butylacrylate and methyl methacrylate with a glass transition temperature of about 32° C. and a pH from about 8 to about 9. Effective debonding agents include vegetable oils such as soybean oil, corn oil, sunflower oil, castor oil, rapeseed oil, linseed oil, sunflower seed oil, or safflower oil. Soybean oil is highly preferred for its low odor, low color, availability, and low cost. Silicone oils and mineral oils can also be used as debonding agents. A suitable defoaming agent is a non-silicone defoaming (e.g., Surfynol DF-210 commercially available from Air Product, Allentown, Pa.). Suitable preservatives include a mixture of 1-(3-chloroallyl)-3,5,7-triaza-1-azoniaadamantane chloride (64%); sodium bicarbonate (33%); hexamethylenetetramine (2%), and water (1%), commercially available under the designation Dowicil 75. Suitable dispersing aids include acetylenic diols, for example, 2,4,7,9-tetramethyl-5-decyne-4,7-diol, commercially available under the designation Surfynol 104PA. Associative thickeners can also be included in the paint, including, for example, a polyether polyurethane urea solution in a mixture of water and diethylene glycol monobutyl ether, commercially available under the designation Rheolate 288. Suitable coalescing agents include substituted glycols, for example, 2,2,4-trimethyl-1,3-pentanediol mono(2-methylpropanoate), commercially available under the designation Texanol.
- In another aspect, the present invention provides a method for making a labeling paint. In one embodiment, the labeling paint is made in two stages. In a first stage a stable emulsion is formed under high shear conditions. The emulsion includes water and a debonding agent that is active on metal surfaces. In one embodiment, the emulsion includes water, one or more viscosity enhancing agents, one or more surfactants, and one or more debonding agents. In the second stage, the emulsion is combined with a suspension under relatively low shear conditions to provide the labeling paint. The suspension includes water and a polymeric binder having glass transition temperature (Tg) greater than about 25° C. In one embodiment, the suspension includes water, one or more polymeric binders, and one or more opacifying agents.
- In one embodiment, the method of the invention involves an initial step in which a stable emulsion is produced using mixing equipment that provides a relatively high shearing action. In one embodiment, the emulsion includes water, a viscosity enhancing agent, a surfactant and a debonding additive that is active on metal surfaces. Other compounds that can also be incorporated into the emulsion include preservatives, defoaming agents, and stabilizers.
- Suitable viscosity enhancing agents include nonionic polysaccharides, such as hydroxyethylcellulose and carboxymethylcellulose. Nonionic and anionic surfactants can also be used for this invention. In one embodiment, the emulsion includes an anionic surfactant that is based on a long-chain fatty acid and an amine, such as morpholine or triethanolamine.
- Suitable debonding agents include vegetable oils, such as soybean oil, and those noted above. Silicone oil or mineral oil or mixtures of oils can also be used as debonding agents.
- Polyols and long chain alcohols, such as stearyl alcohol and isostearyl alcohol, can be used to stabilize the emulsion and increase its viscosity. These alcohols may also ultimately promote the release of the labeling paint formulation from the metal stencil.
- In one embodiment, the emulsion composition includes water (from about 38.0 to about 93.9%), a viscosity enhancing agent (from about 0.1 to about 2.0%), a surfactant (from about 1 to about 10%) and a debonding agent active on metal surfaces (from about 5.0 to about 50.0%). In another embodiment, the emulsion composition includes water (from about 40.0 to about 60.0%), a viscosity enhancing agent (from about 0.2 to about 1.0%), a preservative (from about 0.01 to about 0.3%), a surfactant (from about 3.0 to about 5.0%), a debonding agent active on metal surfaces (from about 30.0 to about 45.0%), and a stabilizing agent (from about 3.0 to about 6.0%).
- As noted above, in one embodiment, the labeling paint can be made by a method having two stages: (1) emulsion formation and (2) emulsion blending. The emulsion can be conveniently prepared with multiple vessels. For example, in one vessel a mixture of the debonding agent and other water insoluble materials are combined. It is convenient to add long chain fatty acids and stabilizing agents to this vessel. In many cases this mixture is stirred and heated to a temperature sufficient to melt any solid components in the mixture. Once all of the materials are in a liquid state, mild agitation is sufficient to achieve a homogenous mixture. The molten mixture can be cooled to room temperature without freezing. In a second vessel an aqueous solution is prepared by agitating a mixture of water and viscosity enhancing agent. It is usually advantageous to add a preservative and an amine to this aqueous phase with additional stirring until a single-phase solution has been achieved. At this point, the aqueous phase and the debonding agent mixture can be combined. The combination provides a relatively stable emulsion with minimal agitation. The resulting combination can then be subjected to a period of high-shear mixing. For instance, it is quite appropriate to subject the mixture to a homogenizer, which applies shear to the mixture under high pressure. This results in a finely dispersed, stable emulsion with minimal froth. Other techniques can be used to establish a finely dispersed emulsion, but the formation of froth should generally be minimized. The resulting emulsion has a viscosity that is generally in the range of from about 500 to about 5000 cps and is stable with respect to phase separation. Thus, the emulsion so produced can be shipped to another processing center and/or stored for prolonged periods of time.
- In a second stage of the method, the emulsion is blended under relatively low shear mixing conditions with a previously dispersed opacifying agent and a polymeric binder having a glass transition temperature greater than about 25° C. In certain embodiments, additional materials are incorporated into the formulation. These include water, defoaming agents, colorants, viscosity enhancing agents, optical brighteners, plasticizing agents, coalescing agents, dispersing aids, among other additives.
- Examples of dispersed or suspended opacifying agents include aqueous titanium dioxide suspensions or organic pigment suspensions. Typically, these suspensions are from about 40 to about 60% solids with an aqueous continuous phase. In many cases these suspensions will contain small amounts of a dispersing aid.
- A suitable polymeric binder is an acrylic latex (e.g., butylacrylate/methylmethacrylate copolymer latex) with a glass transition temperature that is greater than about 25° C. and a pH value that is between about 8-10.
- Desirable colorants can be based on aqueous colored organic pigment dispersions.
- Associative thickeners can be used in this part of the formulation to increase the viscosity.
- Coalescing agents, such as ethylene glycol monobutyl ether, can be used to improve the properties of the final formulation.
- In one embodiment, the labeling paint includes the emulsion prepared as described above (from about 10.0 to about 55.0%), opacifying pigment dispersion (from about 1.0 to about 50.0%), and a polymeric binder (from about 1.0 to about 50.0%). In another embodiment, the labeling paint includes the emulsion (from about 30.0 to about 45.0%), associative thickener (from about 0.1 to about 1.0%), opacifying pigment dispersion (from about 20.0 to about 40.0%), a polymeric binder (from about 10.0 to about 20.0%), and a coalescing agent (from about 5 to about 15%).
- Representative labeling paints, their properties, and methods for their preparation are described in Examples 1 and 2.
- The following examples are provided for the purpose of illustrating, not limiting, the invention.
- A representative labeling paint was prepared as follows. A 200-liter primary mixing vessel was charged with warm water (50° C., 22.50 kg) and a hydroxyethylcellulose powder, known as Natrosol 250 MBR [Herculese, Inc.; Hopewell, Va.] (250 g). The components were agitated by use of a Cowles disperser (6 inch blade, 1000 rpm) for a period of 30 minutes. A 50% morpholine solution (aq) (800 g) was added to the primary mixing vessel and the contents were agitated by use of the Cowles disperser (6 inch blade, 100 rpm) for an additional five minutes. A preservative known as Dowicil 75 [DOW Chemical Inc.; Midland, Mich.] (40 g) was added to the primary mixing vessel and the contents were agitated by use of the Cowles disperser (6 inch blade, 100 rpm) for an additional five minutes. A dispersing aid known as Surfynol 104PA [Air Products and Chemical Corp.; Allentown, Pa.] (300 g) was added to the primary mixing vessel and the contents were agitated by use of the Cowles disperser (6 inch blade, 100 rpm) for an additional five minutes. A titanium dioxide powder, known as Tronox CR-826 [Kerr-McGee Chemical Corp.; Oklahoma City] (17.50 kg) was added to the primary mixing vessel and the contents were agitated by use of the Cowles disperser (6 inch blade, 100 rpm) for an additional 30 minutes. A warm oil mixture (65° C., 21.00 kg) was added to the primary mixing vessel and the contents were agitated by use of the Cowles disperser (6 inch blade, 100 rpm) for an additional 10 minutes. The oil mixture was comprised of a homogenous blend of soybean oil [Archer Daniels Midland Co.; Red Wing, Minn.] (81.67% by weight); a mixture of hydrogenated fatty acids, known as Pristerene 4910 [Unichema International; Chicago, Ill.] (13.33% by weight); 1-octadecanol [Proctor and Gamble; Cincinnati, Ohio] (1.67% by weight); and a poly(propylene glycol), average MW=1050 Da, known as Pluracol P1010 [BASF Corp.; Wyandotte, Mich.] (3.33% by weight). Warm water (36° C., 13.81 kg) was added to the primary mixing vessel and the contents were manually agitated by use of a paddle in a gentle fashion until the mixture appeared to be homogenous. An acrylic latex, a butylacrylate/methylmethacrylate copolymer latex known as CS-4000 [Rohm and Haas Co.; Philadelphia, Pa.] (12.40 kg) was added to the primary mixing vessel and the contents were manually agitated by use of a paddle in a gentle fashion until the mixture appeared to be homogenous. A defoaming agent known as Surfynol DF-210 [Air Products and Chemical Corp.; Allentown, Pa.] (400 g) was added to the primary mixing vessel and the contents were manually agitated by use of a paddle in a gentle fashion until the mixture appeared to be homogenous. A coalescing agent known as Texanol [Eastman Chemical Co.; Kingsport, Tenn.] (11.00 kg) was added to the primary mixing vessel and the contents were manually agitated by use of a paddle in a gentle fashion until the mixture appeared to be homogenous. The formulation was then filtered through a 20 mesh filter and slowly cooled to 20-25° C.
- The labeling paint prepared as described above had a pH value of 8, a percent solids value of 44 to 45, and a specific gravity of 1.09 to 1. 13. The Hegman particle size test value was 7+. The Brookfield viscosity value was 5000 cps at a temperature of 24° C.(RVF #7, 50 rpm). An aliquot of the formulation was stored without agitation in a closed container at a temperature of about 20 to about 25° C. for about two months and no sediment formation or phase separation were observed. The color of the formulation was bright white and the odor was slight and pleasant.
- The labeling paint described above was shipped to an OSB mill [Weyerhaeuser Co.; Grayling, Mich.] and utilized on the finishing line in place of a conventional labeling paint [High-Hide White Stencil Paint; Associated Chemists Inc.; Portland, Oreg.]. The labeling paint required no agitation in its storage tank, as compared to the High-Hide White Stencil Paint, which required constant agitation. The labeling paint was easily transferred out of its storage tank to a spray gun by use of a 10:1 air motor piston pump. The labeling paint atomized properly as it exited the spray gun. Fewer nozzle clogs per day were reported with the labeling paint than typically observed with the High-Hide White Stencil Paint. The labeling paint did not bleed into the freshly applied green edge sealant on the side of the OSB units, but it did wet-out the surface of the freshly applied green edge sealant in a manner that was sufficient to permit bonding. The edge sealant being used in conjunction with the labeling paint was known as PF6014-34 [Associated Chemists Inc.; Portland, Oreg.]. The visual contrast between the bright white images formed by the labeling paint and the dark green edge sealant as background on the side of the units was dramatic and aesthetically pleasing. The labeling paint that accumulated on the aluminum stencil did not drip into the lettering or logo voids. The operators were able to run the finishing line without cleaning the stencil for four hours at a time. The operators reported that they generally needed to stop and clean the stencil with the High-Hide White Stencil Paint once every 20 to 25 minutes. When the operators did stop to clean the stencil they reported that the labeling paint was much easier and faster to remove than the High-Hide White Stencil Paint. The bond between the dried labeling paint and the stencil was very weak. The labeling paint tended to peal off of the stencil in large sheets and it left a very thin oily residue on the surface of the metal. Overall, the finishing line operators expressed a strong preference for the labeling paint.
- A representative labeling paint was prepared as follows.
- Emulsion Formation.
- An emulsion suitable for use in a representative labeling paint was prepared as follows. A primary mixing vessel was charged with warm water (70° C., 52.85 parts by weight) and a hydroxyethylcellulose powder, known as Natrosol 250 MBR [Herculese, Inc.; Hopewell, Va.] (0.50 parts by weight). The components were mixed with a high shear rate for a period of 20 minutes. Morpholine (1.00 parts by weight) and triethanolamine (1.00 parts by weight) were added to the primary mixing vessel and the contents were further mixed for an additional 5 minutes. A preservative known as Dowicil 75 [DOW Chemical Inc.; Midland, Mich.] (0.15 parts by weight) was added to the primary mixing vessel and the contents were further mixed for an additional 5 minutes. A warm oil mixture (55° C., 44.50 parts by weight) was added to the primary mixing vessel and the contents were further mixed for an additional 5 minutes. The oil mixture was comprised of a homogenous blend of soybean oil [Archer Daniels Midland Co.; Red Wing, Minn.] (77.50 parts by weight); a mixture of hydrogenated fatty acids (64% stearic acid and 28% palmitic acid), known as Pristerene 4910 [Unichema International; Chicago, Ill.] (10.00 parts by weight); isostearyl alcohol, known as Prisorine 3515 [Unichema International; Chicago, Ill.] (2.50 parts by weight); and a poly(propylene glycol), average MW=1050 Da, known as Pluracol P1010 [BASF Corp.; Wyandotte, Mich.] (10.0 parts by weight). At this point the mixture was a low viscosity, opaque, emulsion with a relative coarse level of dispersion. This warm mixture was then processed through a two-stage homogenizer with an impingement pressure of about 3500 psi at a temperature of 55-65° C. The resulting emulsion was gradually cooled to a temperature of 20° C.
- The emulsion had a viscosity of about 3300 cps [Brookfield, #3 spindle, 20 rpm, 20° C.] and a specific gravity of about 0.95. The emulsion did not exhibit any phase separation or sedimentation when stored at 20° C. for a period of 2 months.
- Emulsion Blending.
- A second primary mixing vessel was charged with the emulsion prepared as described above (20° C.; 39.03 parts by weight) and water (0.63 parts by weight). The mixture was stirred at a low shear rate for 5 minutes. A defoaming agent known as Surfynol DF-210 [Air Products and Chemical Corporation; Allentown, Pa.] (0.40 parts by weight) was added to the primary vessel and the contents were stirred at a low shear rate for an additional 5 minutes. An associative thickening agent known as Rheolate 288 [Rheox Incorporated; Hightstown, N.J.] (0.13 parts by weight) was added to the primary vessel and the contents were stirred at a low shear rate for an additional 5 minutes. A titanium dioxide dispersion (27.20 parts by weight) was added to the vessel and the contents were stirred at a low shear rate for an additional 5 minutes. The titanium dioxide dispersion was prepared by mixing water (44.70 parts by weight), a dispersing aid known as Surfynol 104PA [Air Products and Chemical Corp.; Allentown, Pa.] (0.40 parts by weight), and titanium dioxide powder, known as Tronox CR-826 [Kerr-McGee Chemical Corp.; Oklahoma City] (54.90 parts by weight) with high shear in a secondary vessel for 30 minutes. An organic white pigment dispersion, a dispersion of hollow polymer spheres known as Rhopaque Ultra [Rohm and Haas Co.; Philadelphia, Pa.] (6.00 parts by weight), was added to the primary vessel and the contents were stirred at a low shear rate for an additional 5 minutes. An aqueous latex based on an acrylic polymer with a Tg≧25° C., butylacrylate/methylmethacrylate copolymer latex, known as CS-4000 [Rohm and Haas Co.; Philadelphia, Pa.] (16.50 parts by weight), was added to the primary vessel and the contents were stirred at a low shear rate for an additional 5 minutes. A coalescing agent known as Texanol [Eastman Chemical Co.; Kingsport, TN] (10.00 parts by weight), was added to the primary vessel and the contents were stirred at a low shear rate for an additional 5 minutes.
- The resulting formulation had a pH value of 8-9, a specific gravity of 1.0-1.1. The Hegman particle size test value was 7+. The formulation had a viscosity of about 15,000 cps [Brookfield, #6 spindle, 20 rpm, 20° C.]. An aliquot of the formulation was stored without agitation in a closed container at a temperature of 20-25° C. for 2 months and no sediment formation or phase separation were observed. The color of the formulation was bright white and the odor was slight and pleasant. The formulation was readily atomized in a conventional spray paint gun. The labeling paint did not bleed into freshly applied green edge sealant on the side of an OSB unit, but it did wet-out the surface of freshly applied green edge sealant in a manner that was sufficient to permit bonding. This formulation was very resistant to dripping on a metallic stencil and it dried to form a film that was very easily pealed or scrapped off of the metal.
- While the preferred embodiment of the invention has been illustrated and described, it will be appreciated that various changes can be made therein without departing from the spirit and scope of the invention.
- The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
Claims (35)
1. A water-based paint composition, comprising:
(a) an opacifying agent;
(b) a polymeric binding agent; and
(c) a debonding agent active on metal surfaces.
2. The composition of claim 1 further comprising at least one of a viscosity enhancing agent, a surfactant, a preservative, an optical brightener, a plasticizer, a dispersing aid, a coalescing aid, and a defoaming agent.
3. The composition of claim 1 , wherein the opacifying agent comprises titanium dioxide.
4. The composition of claim 2 , wherein the viscosity enhancing agent is at least one of a soluble nonionic polysaccharide and a suspended particle-type viscosity enhancing agent.
5. The composition of claim 4 , wherein the soluble nonionic polysaccharide is at least one of hydroxyethylcellulose and carboxymethylcellulose.
6. The composition of claim 4 , wherein the suspended particle-type viscosity enhancing agent comprises fumed silica.
7. The composition of claim 2 , wherein the surfactant is at least one of a nonionic surfactant and an anionic surfactant.
8. The composition of claim 7 , wherein the anionic surfactant comprises a salt derived from morpholine and a long-chain carboxylic acid.
9. The composition of claim 8 , wherein the long-chain carboxylic acid is at least one of stearic acid, palmitic acid, and myristic acid.
10. The composition of claim 1 , wherein the polymeric binding agent comprises a latex having a glass transition temperature greater than about 25° C.
11. The composition of claim 10 , wherein the latex comprises a copolymer of butylacrylate and methyl methacrylate.
12. The composition of claim 11 , wherein the copolymer has a glass transition temperature of about 32° C.
13. The composition of claim 11 , wherein the copolymer has a pH from about 8 to about 9.
14. The composition of claim 1 , wherein the debonding agent is at least one of a vegetable oil, a silicone oil, and a mineral oil.
15. The composition of claim 14 , wherein the vegetable oil is at least one of soybean oil, corn oil, sunflower oil, castor oil, rapeseed oil, linseed oil, sunflower seed oil, and safflower oil.
16. The composition of claim 1 , wherein the composition exhibits no sediment formation for about at least two months when stored at about 20° C.
17. The composition of claim 1 , wherein the composition exhibits no phase separation for about at least two months when stored at about 20° C.
18. The composition of claim 1 , wherein the composition is spreadable at rate of from about 10 to about 300 g/m2.
19. The composition of claim 1 , wherein the opacifying agent is present in the composition in an amount from about 0.5 to about 35 percent by weight based on the total weight of the composition.
20. The composition of claim 2 , wherein the viscosity enhancing agent is present in the composition in an amount from about 0.5 to about 10 percent by weight based on the total weight of the composition.
21. The composition of claim 2 , wherein the surfactant is present in the composition in an amount from about 0.5 to about 5 percent by weight based on the total weight of the composition.
22. The composition of claim 1 , wherein the polymeric binding agent is present in the composition in an amount from about 3 to about 30 percent by weight based on the total weight of the composition.
23. The composition of claim 1 , wherein the debonding agent is present in the composition in an amount from about 10 to about 50 percent by weight based on the total weight of the composition.
24. A water-based paint composition, comprising:
(a) an opacifying agent comprising titanium dioxide;
(b) a viscosity enhancing agent comprising hydroxyethylcellulose;
(c) a surfactant comprising a salt derived from morpholine and a long-chain carboxylic acid;
(d) a polymeric binding agent comprising an acrylic-based latex; and
(e) a debonding agent active on metal surfaces comprising soybean oil.
25. The composition of claim 24 further comprising at least one of a preservative, a dispersing aid, a defoaming agent, and a coalescing agent.
26. The composition of claim 24 , wherein the composition exhibits no sediment formation for about at least two months when stored at about 20° C.
27. The composition of claim 24 , wherein the composition exhibits no phase separation for about at least two months when stored at about 20° C.
28. The composition of claim 24 , wherein the composition is spreadable at rate of from about 10 to about 300 g/m2.
29. A method for labeling an oriented strandboard panel bundle, comprising:
(a) placing a stencil against a side of an oriented strandboard panel bundle, wherein the bundle comprises a stack of oriented strandboard panels, and each panel having an exposed edge;
(b) applying a paint composition to the exposed edges of the oriented strandboard panels by spraying the composition through the stencil; wherein the composition comprises a water-based paint composition, comprising:
(i) an opacifying agent;
(ii) a polymeric binding agent; and
(iii) a debonding agent active on metal surfaces; and
(c) removing the stencil from the unit.
30. The method of claim 29 , wherein the composition is applied at a spread rate of from about 10 to about 300 g/m2.
31. A method for making a labeling paint composition, comprising blending an aqueous suspension comprising an opacifying agent and a polymeric binding having a glass transition temperature greater than about 25° C. with an emulsion comprising a debonding agent active on metal surfaces to provide a labeling paint.
32. The method of claim 31 , wherein the emulsion is prepared under high shear conditions.
33. The method of claim 31 , wherein the emulsion further comprises a viscosity enhancing agent.
34. The method of claim 31 , wherein the emulsion further comprises a surfactant.
35. The method of claim 31 , wherein the suspension further comprises a coalescing agent.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/943,885 US20020165309A1 (en) | 2000-05-25 | 2001-08-30 | Labeling paint and method for the manufacture thereof |
CA 2391722 CA2391722C (en) | 2001-08-30 | 2002-06-26 | Labeling paint and method for the manufacture thereof |
US10/405,834 US6841611B2 (en) | 2000-05-25 | 2003-04-02 | Labeling paint and method for the manufacture thereof |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20708500P | 2000-05-25 | 2000-05-25 | |
US09/829,508 US7026389B2 (en) | 2000-05-25 | 2001-04-09 | Labeling paint for use with metallic stencils on oriented strandboard finishing line |
US09/943,885 US20020165309A1 (en) | 2000-05-25 | 2001-08-30 | Labeling paint and method for the manufacture thereof |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/829,508 Continuation-In-Part US7026389B2 (en) | 2000-05-25 | 2001-04-09 | Labeling paint for use with metallic stencils on oriented strandboard finishing line |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/405,834 Division US6841611B2 (en) | 2000-05-25 | 2003-04-02 | Labeling paint and method for the manufacture thereof |
Publications (1)
Publication Number | Publication Date |
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US20020165309A1 true US20020165309A1 (en) | 2002-11-07 |
Family
ID=46150014
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/943,885 Abandoned US20020165309A1 (en) | 2000-05-25 | 2001-08-30 | Labeling paint and method for the manufacture thereof |
US10/405,834 Expired - Fee Related US6841611B2 (en) | 2000-05-25 | 2003-04-02 | Labeling paint and method for the manufacture thereof |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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US10/405,834 Expired - Fee Related US6841611B2 (en) | 2000-05-25 | 2003-04-02 | Labeling paint and method for the manufacture thereof |
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US (2) | US20020165309A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160032132A1 (en) * | 2013-03-15 | 2016-02-04 | Church & Dwight Co., Inc. | Method and composition for depositing textured imprints onto a substrate surface |
CN107117872A (en) * | 2017-05-08 | 2017-09-01 | 福建华夏蓝新材料科技有限公司 | A kind of super-hydrophobic colorful true mineral varnish coating and preparation method thereof |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2866343B1 (en) | 2004-02-12 | 2006-03-24 | Alain Wayser | COLOR AND LIQUID PROTECTION PRODUCT FOR SUPPORT |
CA2646754A1 (en) * | 2006-04-04 | 2007-10-11 | The Sherwin-Williams Company | Low odor latex paint capable of reducing interior odors |
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US3959224A (en) * | 1971-02-01 | 1976-05-25 | The Lubrizol Corporation | Water-soluble hydroxyalkylated and alkoxyalkylated compositions and the like derived from N-3-oxohydrocarbon-substituted acrylamides, and polymers thereof |
CA1102466A (en) * | 1978-12-06 | 1981-06-02 | Albert Suk | Aerosol water-based paint composition |
AU3742185A (en) | 1983-11-22 | 1985-03-04 | Udviklingsselskabet A F 31 10 1983 ApS | Paint |
US5610215A (en) | 1990-04-03 | 1997-03-11 | Gregory A. Konrad | Aqueous emulsion-based coating compositions |
US5385960A (en) * | 1991-12-03 | 1995-01-31 | Rohm And Haas Company | Process for controlling adsorption of polymeric latex on titanium dioxide |
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US5445754A (en) * | 1994-03-28 | 1995-08-29 | P.S.A.M.S., Inc. | Water-based, thermal paint |
MY115083A (en) * | 1996-06-07 | 2003-03-31 | Rohm & Haas | Waterborne traffic paints having improved fast dry characteristic and method of producing traffic markings therefrom |
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US3951899A (en) * | 1970-06-22 | 1976-04-20 | Ppg Industries, Inc. | Opaque, microcellular films from latex compositions, process and composition for preparing the same |
US3894976A (en) * | 1972-07-27 | 1975-07-15 | Kelco Co | Pseudoplastic water base paint containing a novel heteropolysaccharide |
US4045393A (en) * | 1975-01-14 | 1977-08-30 | N L Industries, Inc. | Rust resistant latex paint primer for metal surfaces |
US4521489A (en) * | 1983-03-01 | 1985-06-04 | Reliance Universal, Inc. | Low temperature cure coating system suitable for metal and plastic substrates |
Cited By (2)
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US20160032132A1 (en) * | 2013-03-15 | 2016-02-04 | Church & Dwight Co., Inc. | Method and composition for depositing textured imprints onto a substrate surface |
CN107117872A (en) * | 2017-05-08 | 2017-09-01 | 福建华夏蓝新材料科技有限公司 | A kind of super-hydrophobic colorful true mineral varnish coating and preparation method thereof |
Also Published As
Publication number | Publication date |
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US20030204009A1 (en) | 2003-10-30 |
US6841611B2 (en) | 2005-01-11 |
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