MXPA00005361A - Production of two-pack rapid cure water-paint composition and paint composition produced thereby - Google Patents

Abstract

This invention relates to a method of producing a two-pack or multi-pack fast-setting waterborne paint composition, particularly a traffic paint, which has a reducing component in one pack and an oxidizing component in the other pack of the two-pack paint composition. The present invention also relates to the two-pack or multi-pack waterborne paint composition produced therefrom.

Description

METHOD FOR PRODUCING A COMPOSITION OF PAINTING BASED ON WATER, QUICK SETTING, TWO PACKAGES AND THE COMPOSITION OF PAINT SO WAS OBTAINED 5 The present invention relates to a method for producing a fast-setting, water-based paint composition. of two packages or multipacks, particularly a painting for traffic signals, which has a reducing component in one package and an oxidizing component in the other package of the two-pack paint composition. The present invention also relates to the two-pack water-based paint composition, produced according to the method. One of the many important features of coatings, particularly paint for signaling roads or traffic signals, is the speed at which they dry on the surface of a particular substrate after application. For example, the drying speed of a paint for traffic signs dictates the length of traffic interruptions on the road so that the paint can be applied and allowed to dry properly. The tendency is to demand shorter interruptions using a paint that dries faster (fast setting). 25 Conventional coating compositions or quick-drying paints are based on polymer resins organic (also called binders) dissolved, suspended or otherwise dispersed in organic solvents of relatively low boiling temperature. The organic solvents of low boiling temperature are rapidly evaporated after application of the paint on the road, to provide the desired fast drying characteristics of a recently applied road marking. Either way, in addition to releasing organic solvents in the environment, this kind of The paint formula tends to expose the equipment to the vapors of organic solvents. Due to these limitations and the rigorous mandates that are increasing, decreed by governments and communities, it is greatly desired to develop coatings or paints that are less harmful to the environment. environment, while retaining the properties and / or characteristics of rapid drying. A less harmful coating for the environment uses water base, for example, polymers or water-based resins, instead of polymers or resins based on organic solvents (binders). Mainly due to a combination of the highest boiling point, the high latent heat of evaporation, the high polarity and the hydrogen bond of the water, the drying times of water-based paints or coatings are generally greater than those that are exhibited by coatings based on ^ míi? mm.tikíiM organic solvents. WO 94/29391 discloses the use of a water-based paint, based on (a) a unique class of aqueous dispersion polymer as described in EP-BO.322-188 and EP-A-409459, and (b) the application of a water-soluble acid to the recently applied paint. In view of the chemistry involved, it seems that it is only useful for coagulable acid-based paint formulas. The Patent of E.U.A. No. 5403393 discloses water-based coating compositions comprising an anionically stabilized aqueous dispersion of a water-insoluble polymer, prepared by emulsion polymerization or mechanical emulsification, inorganic pigment dispersed with anionic polymers, salt, or soaps and the salt propionic acid of calcium. When the coatings are applied, they quickly develop resistance to being washed by an involuntary precipitation. It has been unexpectedly discovered that a water-based, two-pack or multi-pack quick-drying paint composition containing a binder can be produced by placing one reducing component in one "package" and one oxidizing component in the other "package". and then mixing the two packages when applying it on a surface of a substrate, or at a convenient time prior to application. This pair of components is referred to herein as a •• "redox couple." The term "two packs" is used in the present to express, as it is understood by those skilled in the art, that a paint composition consists of two separate parts or packages, which are combined during or just before the application of the paint on the surface. It is also within the scope of the present invention to use a multi-pack composition. The binder may be in any of the packages, or both, in a two pack composition, depending on the properties and chemical and physical compatibilities of the binder, the oxidizing component and the selected reducing component. Alternatively, the binder may be in a third pack in a multi-pack composition. The present invention can be used in many coating, paint or signaling applications. For example, the invented method and composition can be used for paints for road signs, road signs, house paints, maintenance coatings for exterior and interior surfaces of buildings, walls, roofs, roofs, and other structures. Other applications include the coating of metal surfaces of a variety of objects such as signs, boats, cars, etc. All surfaces may already have one or more layers of existing coating or paint. Even, all surfaces can have a "primer" (primer paint). mm m ßßßmm? tm.j.? aiMé ^ i ámmbíti ^ ÉláiMIa.b.tlÉ.a When discussing road signs or paints for traffic signs, the term "road" is used in the present as a generic term. This includes any interior or exterior solid surface that is or may be continuously exposed, constantly or in intermediate to pedestrians, moving vehicles, tractors, other moving objects or aircraft. Some non-limiting examples of "road" include highways, streets, trails, sidewalks, tracks, taxi areas, asphalt areas, parking lots, rooftops, interior floors (such as those in a shopping center), etc. The material of the surface can be ashlar masonry, tar, asphalt, resins, concrete, cement, stone, stucco, slab, polymeric materials, wood and combinations of these. It is also within the scope of the invention to apply the water-based coating, of two components, or of multicomponent, on another fresh or aged coating, or on the signaling already applied on the surface. There may also be a "primer" (primer paint) on the surface. The terms "quick drying", "faster drying", "rapid hardening", "quick setting", "rapid drying property", "increased drying" and "accelerated drying" are used interchangeably in the present to say that a two component or multicomponent composition prepared and used according to the method of the present invention, i has a drying time that is shorter than that of a composition used without using the composition of the oxidizing component / reducing component. The drying rate is usually measured by the "time to dry", according to a standard ASTM D1640 test method, with the exception that no thumb pressure is used. For the present invention, it is preferred that the drying wait time of the composition or of the paint or coating compositions, be one hour or less, at 25 ° C and 90% RH (relative humidity). In the present invention, there are several general requirements for the oxidizing component and the reducing component. First, the oxidizing component and the reducing component must be compatible with other compounds and materials present in the two packages and in the multi-packages. This need for compatibility may limit what the compound may have to go with the oxidizing component in a package, and what may go with the reducing component in the other package. Second, both components must be relatively stable in individual packages under storage conditions. This would allow the two separate packages to have a reasonable life in storage, prior to use. Third, to be useful for as many colors as possible, it is preferred that both components and their reaction products are not highly colored.

Fourth, the reaction between the oxidizing component and the reducing component must be completed within a relatively short period of time, particularly for a fast-drying paint composition. A period of less than five minutes within the scope of the present invention is preferred. Depending on the application form, a very short reaction time, 0.1 seconds to 60 seconds, may or may not be preferred, if the finish coating or the marking does not have the desired finish and / or other properties. A characteristic of a suitable reducing component is that they can form ions of a valence state of at least +1, preferably +2 or higher, when oxidized. Another preferred feature for a reducing component It is convenient that it can form, when oxidized, ions of a positive charge higher than that, if any, found in the oxidizing component. The reducing components can be organic, inorganic, organometallic or combinations thereof. Some examples of an inorganic reducing component Suitable include, but are not necessarily limited to, metal containing compounds such as elemental metal, iron compounds, cobalt compounds, stannous compounds, and mixtures thereof. Some specific reducing components include elemental aluminum, ferrous sulfate, cobaltous chloride, cobaltous acetate, stannous sulfate, and "• * - ~" ^ '* * mixtures of these. Specific chemical compounds also include their respective hydrates, if any. For a mixture to be convenient, the chemical compatibility between the individual components must exist. Suitable oxidizing components for the present invention can be organic, inorganic, organometallic or combinations. They must have a Standard Reduction Potential that is more positive than those of the reducing compound. See "Handbook of Chemistry and Physics," CRC Press Inc. 8-21-8-31, David R. Lide, Editor in Chief, 76th Edition (1995-1996). Examples of a suitable oxidant component for the present invention include, but are not necessarily limited to, copper compounds (copper 11+), such as cupric chloride, cupric bromide; chlorites such as sodium chlorite (NaC102); hypochlorites such as sodium hypochlorite; perchlorates such as potassium perchlorate; and mixtures of these. Specific chemical compounds also include their respective hydrates, if any. For a mixture of the oxidizing component to be convenient, there must be chemical compatibility between the different individual components. The oxidizing component and the reducing component do not have to be soluble in their respective "packages" for these to be convenient for the present invention. In any case, in order to have good contact, a good reaction rate and fast-setting properties, it is preferred that at least one of the two components have a good solubility in water, greater than 1 g per lOOg of water, and is preferred even more than 10g per 10Og of water. If one of the components is not soluble, it is preferred that it be in a powder form, a suspension, a micelle, or a colloid. It is preferred that the particle size of the powder, suspension, micelle or colloid be at the rate of 0.1 micrometers (microns, or "f") up to 100 micrometers, and more preferably, at the rate of 1 micrometer to 50 micrometers . It is also important to have an oxidizing component in a package that has a reduction potential compatible with the oxidation potential of the reducing component in the other package. Including examples of a "redox couple" convenient, but not necessarily limited to (1) the oxidizing component consisting essentially of cupric chloride (CuCl 2), and the reducing component consisting essentially of Al (s), (2) the oxidizing component which consists essentially of NaC102 and the reducing component consisting essentially of Al (s) and (3) the oxidizing component consisting essentially of NaCl02, and the reducing component consisting essentially of SnS04. The "(s)" means that aluminum, Al, is used in a .. mm -m, .i. * solid There are several ways to mix the components: for the "redox couples" that have relatively long reaction times, the components can be mixed by hand, or with the use of an electric pallet mixer. In all cases, the components can be mixed in radii in the range of 18: 1 to 1:18, mixing systems can be used in atomizers such as the Graco models 226-932 or 226-930. When the components must be mixed in radii of _ > 18: 1 o < _l: 18, mixing systems can be used in atomizers such as the DeVilbiss Pro Bond 2K ™. There should be one or more binders in one or both packs in a fast-setting, water-based paint composition of two packs. The binder or binder selected, must have sufficient chemical and physical compatibilities with the oxidizing and / or reducing component to provide sufficient stability in the shelf, prior to its application. It is possible to keep incompatible substances separately as a multi-pack composition. In this case, The different packages are applied to a surface in a shape and in an order as disclosed herein, to produce a desired kind of coating on the surface. Many different kinds of binder can be used for the present invention, including conventional binders, drying binders ^ Fast metabolism, water-resistant binders and a combination of these. Suitable binders are of two general classes. The first class includes those anionically stabilized water-based emulsion polymers which are anionically charged. The second class includes non-ionic, water-based polymers, which are in an emulsion state stabilized in the presence of anionic surfactants or emulsifiers. Suitable anionic surfactants or emulsifiers include, but are not necessarily limited to, alkyl or aryl sulfates, alkyl or aryl sulfonates, alkyl or aryl phosphates, alkyl or aryl phosphonates, and alkyl or aryl carboxylates. Examples of suitable anionic surfactants include sodium lauralsulfate, sodium dodecylsulfate, Triton7H-55, and N-cocyl-L-15 monosodium glutamate. Triton is a registered trademark owned by Union Carbide Corporation. Many of these binders have been described in the U.S. Patent. No. 5,820,993; Patent of E.U.A. No. 5,804,627, Patent of E.U.A. No. 5,672,379 and the Patent of 20 E.U.A. No. RE 36,032. Because various binder and coating compositions are disclosed in these patents, they are not incorporated herein by reference. Many of the water-based, anionically stabilized polymers (the "first class" described above) are prepared by aqueous emulsion polymerizations, and are most preferred. > , .. U * í * mm - * r¡ * jni, Jf, in the present invention. These binders can be prepared by a number of processes as described in "Emulsion Polymerization of Acrylic Monomers", published by Rohm and Haas Company, May 1966. In general, it is preferred that the binder has a transition vitreous temperature (Tg) at 0 ° C or higher, and an average molecular weight of the number of GPC (Mn) ranging from 1000 to 1000,000, preferably at the rate of 5000 to 200,000, and more preferably at the rate of 5000 to 50,000. The binders may also possess multiple Tg, one of which may be less than 0 ° C. In general, the solids content of a paint could be as high as possible, while maintaining a reasonable viscosity for its application. The solids in the paint can be anywhere at the index of 20 to 90% on a volume basis, preferably at the index of 40 to 70%, and more preferably at the index of 50 to 65%. The binder solids need only be high enough to achieve the desired solids content of the paint formula. Some examples of polymeric materials suitable for use as a binder in the first component of the water-based composition, of two components or multicomponent of the present invention, are components or multicomponents of the present invention, are polymerized or copolymerized from at least one monomer selected from the group consisting of acrylic, methacrylic and crotonic ester monomers, including, but not limited to, necessarily limited to methyl (meth) acrylate or crotonate, ethyl (meth) acrylate or crotonate, n-propyl (meth) acrylate or crotonate, n-butyl (meth) acrylate or crotonate, 2-ethylhexyl (meth) acrylate or crotonate, (meth) acrylate or crotonate of decyl, lauryl (meth) acnlate, isobornyl (meth) acrylate, Isodecyl (meth) acrylate, oleyl (meth) acrylate, (met) palmityl acrylate, stearyl (meth) acrylate, (met) acylate or hydroxyethyl crotonate, (meth) acrylate or 3-hydroxypropyl crotonate, (meth) acrylate or 4-hydroxybutyl crotonate, glycidyl (meth) acrylate; monomers functional in acid, such as, acrylic acid, methacrylic acid, crotonic acid, itaconic acid, citracomic acid, fumaric acid and maleic acid; monomethyl citraconate; monomethyl fumarate; mono-fumarate (n-butyl); maleic anhydride; citraconic anhydride, acrylamide or substituted acplamides; sodium vinyl sulfonate; phosphoethyl (meth) acrylate; propane acrylamide sulfonate; diacetone acrylamide; glycidyl methacrylate; acetoacetyl ethylmethroplate; acrolein and methacrolein, - dicyclopentadienyl methacrylate; dimethyl metaisopropenyl benzyl isocyanate; Isocyanate ethyl methacrylate; styrene or substituted styrenes; H ^ átát? US ^ mmmmmmm, butadiene; ethylene; vinyl acetate or other vinyl esters; vinyl monomers, such as, for example, vinyl halide, preferably vinyl chloride, vinylidene halide, preferably vinylidene chloride, N-vinyl pyrrolidone; aminomonomers, such as, for example, dimethylamino N, N'- (meth) acrylate and acrylonitrile or methacrylonitrile. Another embodiment of the present invention relates to polymeric materials or copolymerized binders of at least one nitrogen containing monomer with other monomers as described above. Due to the monomers containing nitrogen and other monomers disclosed in the patent application of E.U.A. 08 / 812,492, Patent of E.U.A. No. 5,364,891, U.S. Patent. No. 5,494,961 and in the U.S. Patent. No. 4,367,298, these are incorporated herein by reference. Useful methods include addition polymerization of ethylenically unsaturated monomers containing aminofunctionality; the polymerization of monomers that actually generate amines by hydrolysis; the reactions of aziridines with carboxyl-containing polymers; the reactions of polymers containing an enol carbonyl group, for example, acetoacetoxyethyl methacrylate ("AAEM"), and diamines; the reactions of amines with polymers containing epoxy; and reactions of amine with polymers of vinyl benzyl chloride. ÉaifcjM? ---.

There may also be one or more polyfunctional amines or polyimines (such as polyethyleneimine) in the component containing the binder. Many monomers can be polymerized to form the polyfunctional amines or imines. Because the monomers are disclosed in the U.S. Patent. No. 5,804,627; Patent of E.U.A. No. 5,672,379M; and the U.S. Patent. Do not . RE 36,032, are incorporated herein by reference. Examples include, but are not necessarily limited to vinyl aminoalkyl ethers, vinyl aminoalkyl sulphides, unsaturated acrylamides α, β C = C double bonds, N-acryloxyalkyloxazolidines, N-acploxyalkyltetrahydro-1,3-oxazines, aziridines and others. Other more specific examples are ethylene imine, propylene imine, and those disclosed in the U.S. Patent.

No. 5,804,627, column 3, line 52 to column 6, line 26, incorporated herein by reference. The preparation method is the same as the one disclosed in the U.S. Patent. No. 5,804,627, column 6, lines 27-59, also incorporated herein by reference. Many of the monomers may contain functional groups that can be converted to amino function groups by reactions such as hydrolysis. It is also preferred to have a base in the first component together with a stabilized binder ammonically, based on water, particularly when a S ^^ U ^ m ^ ia ^ i ^ sS ti ?? ? ^^? timim from at least one monomer containing nitrogen as described herein. Alkylamines and low molecular weight ammonia (or their aqueous form - ammonium hydroxide) are examples of the bases. The alkylamines that fall into this category, include methylamine, dimethylamine, trimethylamine, ethylamine, methylethylamine, diethylamine, triethylamine, ethanolamine, diethylhydroxylamine, ethylenediamine, and mixtures thereof. A number of heavier amines can also be used. Examples include morpholine, piperazm, cyclohexylamine, aniline, pyridine, mixtures thereof, and mixtures thereof with other alkylamines or ammonia. It is preferred to use a base or a base mixture which is relatively volatile or has a relatively high vapor pressure, greater than 5 kPa, preferably greater than 20 kPa, at a temperature in the index of 0 ° C to 50 ° C. Ammonia (or its aqueous equivalent - ammonium hydroxide solution having various concentrations) is the most preferred base when a volatile base is used. The amount of a base or a base mixture in the first component that also contains an ammonically stabilizing binder can be in a wide range of concentrations, from 0.01% by weight to 75% by weight based on the total weight of the binder present. A preferred concentration is in the index from 0.1% by weight to 60% by weight, and is more preferred in the index from 1% by weight to weight, and is more preferred in the index from 1% by weight to 50% by weight , all based on the total weight of the binder present in the first component. If a polyamine or polyimine is present in the binder, it is preferred that it have an amount of the base that is sufficient to maintain almost all of the nitrogen-containing functional groups in a non-ionic or quasi-nonionic state (non-protonated state). Polyethyleneimine (PEI) and polypropyleneimine are among the preferred polyimines. The PEI can be obtained from Aldrich Chemical Company, Sigma Chemical Company, ICN Biomedicals, Inc. , and others . A preferred pH of the first component is in the range of 7 to 11.5, and more than 7.5 to 10 is preferred. This pH can be obtained or achieved using many reagents or different methods An example is to add a base, organic, inorganic, or mixtures of these, to the component to adjust the pH to the desired level. As described in the previous paragraph, a desirable pH in the presence of a polyamine or polyimine is to diprotonate all or almost all of the 0 amino functional groups. To further improve other properties such as wear resistance of the paints for traffic signals, other additives or certain monomers containing silicone can be added or incorporated, either at the end of the formula and / or the binder and / or a polyfunctional amine . It is also inside ^. ^^ "^ of the extension of the present invention, incorporate a functionally enamma within the composition of the binder. Because these additives, functional groups, monomers, polymers or copolymers are disclosed in the U.S. Patent. No. 5820993 and the U.S. Patent. No. 5672379, are incorporated herein by reference. It is generally desired, and depending on the intended use of the paint, that additional components may be added to the composition. These additional components include, but are not limited to thickeners; rheology modifiers; colorants; complexing agents; biocides; dispersants; pigments, such as titanium dioxide, organic pigments, carbon black; load targets of one color, such as calcium carbonate, talc, clays, silicas and silicates; charges, such as glass or polymeric microspheres, quartz and sand; antifreeze agents; plasticizers; access accelerators; coalescents; humidifying agents; waxes; surfactants; sliding additives; crosslinking agents; defoamers; colorants; binders; waxes; conservatives; anti-squeeze and antifreeze protectors, corrosion inhibitors; anticoagulants; and polymers soluble in water or alkali. Glass beads, quartz beads or ceramic beads generally provide beneficial reflective properties for traffic signal paints or road marking coatings, particularly for driving at night. They are collectively referred to in the present as "glass beads." The particle size of the glass beads is in the range of 50μ to 1500μ, preferably 80μ to 1250μ, and more preferably in the range of 100μ to lOOOμ. Glass beads can be obtained from several commercial sources such as Potters Industries, Inc. (PQ Corporation), Minnesota Mining and Manufacturing Company (3M), and others. The typical glass beads useful for the present application are those described in the .AASHTO Designation M 247-81 (1993), developed by the American Association of Highway and Transportation Officials of the State (Washington, DC). Glass beads are generally applied at an index of 0.72 - 2.9 kg / L or more of the paint for nighttime visibility and adverse climates. The following are illustrative examples of the present invention and comparison examples. EXAMPLE (INVENTION) 3 The following base paint was made by combining the ingredients in the order listed, while stirring. Rhoplex AC-630 460. lg Tamol 901 7.2g Surfynol CT-136 2.8g Drew L-493 2. Og Ti-Pure R-900 100. Og Omyacrab 5 760.6g premix: methanol 30.0g Texanol 23.0g water 11.6g Natrosol 250HR (2%) 7. Og Dreplus L-493 3.5g water required amount for 71KU viscosity The following 2-pack paint systems were made: iájÉrii ^ ArfHlMl TABLE A Rhoplex and Tamol (registered trademarks); Rhoplex AC-630 binder and Tamol 901 Dispersant, an ammonium salt of a polyelectrolyte that was provided by Rohm and Haas Company, Philadelphia, Pennsylvania @ 30 percent based on solids; Surfynol (a registered trademark) Surfactant CT-136, an acetylenic surfactant that was provided by Air Products and Chemicals, Inc., Allentown, Pennsylvania; Drewplus (a registered trademark) defoamer L-493 AÁúáiÉi ri.ia.ltf.US provided by Ashland Chemical Company, Drew Industrial Division, Boonton, New Jersey; Ti -Puré (a registered trademark) R-900 titanium dioxide that was provided by E.I. DuPont de Nemours & Company, Wilmington, Delaware; Omyacarb (a registered trademark) 5 was provided by Pluess-Staufer Industries, Inc., Proctor, Vermont; Texanol (a registered trademark) ester alcohol that was provided by Eastman Chemicals, Kingsport, Tennessee; Sparkle Silver (a registered trademark) that was provided by Silberline Manufacturing Company, Inc. Pack 1 of the paints was placed inside a plastic bucket. While stirring, Package 2 was quickly injected into Package 1, and it was observed if the paint had visible signs of viscosity change. In all cases, the viscosity appeared to remain essentially unchanged until unanticipated solidification occurred. The solidification time was recorded and is written below. TABLE B EXAMPLE OF COMPARISON The following paintings were made: TABLE C None of these comparison paints were found to have solidified within a 1 hour drying time. The results of the P3 to P3 paints showed that a 2-pack of fast setting paint can be made by including the appropriate oxidizing compounds in one pack, and the appropriate reducing components in the second packet, and then combining the two packets. The results of the PC6 PCI comparison paints show that the inclusion of only the oxidizing compound or only the reducing compound does not cause the paint to dry quickly.

"* - * - - ^ * - • The examples described herein are for the purpose of illustration only, and are not to be construed to limit the spirit or scope of the present invention, which is defined herein by the claims and the specification.

UHiiMÉl MlBiWHJlÉali

Claims (10)

1. CLAIMS 1. A method for producing a fast-setting, two pack, water-based paint composition comprising a binder, the method comprising: preparing a first pack comprising a reducing component; preparing a second package comprising an oxidizing component; and combine the first package with the second package.
2. 2. The method of claim 1, wherein the combination is carried out in a form selected from the group consisting of simultaneous mixing during an application on a substrate, by pre-mixing the application, applying the first package on a substrate followed by applying the second package and applying the second package first on the substrate followed by the application of the first.
3. The method of claim 1, wherein the reducing component is selected from the group consisting of an elemental metal, ferrous compound, cobaltous compound, stannous compound, and mixtures thereof.
4. 4. The method of claim 3, wherein the reducing component is selected from the group consisting of elemental aluminum, ferrous sulfate, cobaltous chloride, cobaltous acetate, stannous sulfate, and mixtures thereof.
5. 5. The method of claim 1, wherein the component Oxidant is selected from the group consisting of a cupric compound, a chlorite, a hypochlorite, a perchlorate and mixtures thereof.
6. 6. The method of claim 5, wherein the oxidizing component is selected from a group consisting of cupric chlorid (CuCl2), cupric bromide, sodium chlorite (NaC102) and mixtures thereof.
7. The method of claim 1, wherein the oxidizing component and the reducing component are selected from the group consisting of redox couples of (1) the oxidizing component consisting essentially of CuCl 2 and the reducing component consisting essentially of Al (s) ), (2) the oxidizing component consisting essentially of NaCl02, and the reducing component consisting essentially of Al (s) and (3) the oxidizing component consisting essentially of NaCl02 and the reducing component consisting essentially of SnS04.
8. The method of claim 2, wherein, the reducing component is selected from the group consisting of an elemental metal, ferrous compound, cobaltous compound, stannous compound, and mixtures thereof; and the oxidizing component is selected from the group consisting of a cupric compound, a chlorite, a hypochlorite, a perchlorate and mixtures thereof.
9. The method of claim 2, wherein the oxidizing component and the reducing component are selected from the group consisting of redox couples of (1) the oxidizing component consisting essentially of CuCl 2 and the reducing component consisting essentially of Al (s) ), (2) the oxidizing component consisting essentially of NaC102, and the reducing component consisting essentially of Al (s) and (3) the oxidizing component consisting essentially of NaCl02 and the reducing component consisting essentially of SnS04.
10. 10. A fast-setting two-pack water-based paint composition comprising a binder, the composition comprising a first pack comprising a reducing component and a second pack comprising an oxidizing component, wherein the reducing component is selected from the group consisting of an elemental metal, a ferrous compound, a cobaltous compound, a stannous compound, and mixtures thereof; and - '"the oxidizing component is selected from the group consisting of a cupric compound, a chlorite, a hypochlorite, a perchlorate and mixtures thereof. ^^^^ *