Coatings comprising NAD polymers with volatile siloxanes

Abstract

The present application relates to a coating composition comprising at least one non-aqueous dispersion (NAD) acrylic alkyd resin polymer, at least one non-aqueous dispersion (NAD) acrylic alkyd resin polymer, or a combination thereof, and at least one siloxane. The at least one siloxane may be a methylsiloxane. Methods of making the coating compositions and articles comprising the coating compositions described herein are also described.

Description

Technical Field

[0001] The present disclosure generally relates to coating compositions comprising at least one non-aqueous dispersion (NAD) acrylic alkyd polymer, at least one non-aqueous dispersion (NAD) acrylic polymer, or a combination thereof, and at least one siloxane. Also disclosed are methods of preparing the coatings and articles comprising the coatings. Background Art

[0002] Recently, clear coatings, stains and colored coatings (including water-based and solvent-based coatings) have been used in many applications, including but not limited to applications in general industry, building materials, homes and commerce, wood, composite materials and other goods that can be coated. However, due to the requirements for coatings with lower or zero volatile organic compounds (VOC), these types of coatings are often difficult to meet the required performance characteristics. In addition, environmental regulations may limit the ability to achieve lower or zero VOC, especially when some solvents lose their exemption status. In addition, consumers who use products with lower or zero VOC may still prefer older products that do not comply with current environmental requirements. Achieving VOC compliance (usually <250g / l VOC) together with performance characteristics has been a well-known industrial challenge.

[0003] For customers with new decks made of wood, composite materials, or a combination of both, coatings may be used to protect the substrate. These coatings may include solvent-based stains or water-based stains. Solvent-based stains are generally easier to apply to wood than water-based stains. Solvent-based stains can penetrate the wood, reducing fold marks and future peeling. In particular, low-solid stains can penetrate into weathered wood substrates. However, stains with high solids content, especially those with greater than about 75% non-volatile matter (NVM), may not penetrate into weathered wood substrates like low-solid stains and may remain on the surface of the substrate. However, solvent-based stains contain higher VOCs and fail due to erosion, where the dry film coating slowly decomposes over time after weathering. In addition, they tend to serve as a food source for mold, mildew, and algae, especially in the case of solvent-based stains containing linseed oil. For example, long oil alkyd resins have been used in high-solid wood stains. Additionally, product performance of coatings containing long oil alkyds suffers from slow drying times and stickiness, especially in the case of solvent-based stains containing long oil alkyds with mineral oil. To overcome these challenges, water-reducible alkyd technology has been developed to achieve low VOC goals, but the high polarity of alkyds reduces their performance properties, including weatherability.

[0004] Alternatively, water-based acrylic stains generally offer improved UV resistance and color retention. Although water-based acrylic stains have improved drying times, they are more difficult to apply. In addition, water-based acrylic stains may not penetrate into weathered wood substrates as well as solvent-based stains and remain on the substrate surface. Since they have a harder time penetrating the wood, they also have the potential to peel if the coating is over-applied due to loss of adhesion to the wood substrate. Water-based acrylic stains may also be difficult to re-apply if the coating has peeled inconsistently.

[0005] Furthermore, lower VOCs in solvent-based coatings generally result in thicker coatings and provide film build that may not be desirable. Additionally, coatings with higher VOCs and water-based coatings may have difficulty penetrating into substrates such as wood. Ease of application may also be affected by VOC variations within the coating as well as folding.

[0006] Manufacturers and consumers are increasingly demanding these specific performance requirements for such coatings, especially wood coatings. Manufacturers and consumers are constantly looking for coatings that exhibit these performance requirements, such as weatherability, abrasion resistance, adhesion, applicability, and mold, mildew, and algae resistance, while having reduced VOCs and without sacrificing other properties and applicability. In view of these challenges to many conventional coatings, there remains a need for improved coatings with binders that can provide weatherability, abrasion resistance, adhesion, lower VOCs, and other improved properties, as well as other advantages. Summary of the invention

[0007] The embodiments described herein are not intended to be exhaustive or limiting of the content provided in the claimed subject matter and disclosed in the detailed description. Instead, the embodiments are selected and described so that other technical personnel in the art can recognize and understand the principles and practices provided in the claimed subject matter.

[0008] A coating and method of making the same are shown and described. The coating composition may include at least one non-aqueous dispersion (NAD) acrylic alkyd polymer, at least one non-aqueous dispersion (NAD) acrylic polymer, or a combination thereof, and at least one siloxane.

[0009] The present disclosure also describes a method of preparing a coating composition comprising at least one non-aqueous dispersion (NAD) acrylic alkyd polymer and at least one siloxane. Also described is a coating composition comprising at least one non-aqueous dispersion (NAD) acrylic alkyd polymer, at least one non-aqueous dispersion (NAD) acrylic polymer, or a combination thereof, and at least one siloxane.

[0010] To achieve the aforementioned and related purposes, the following description shows certain exemplary aspects and embodiments. These representations may adopt some of the various ways of one or more aspects. When considered, other aspects, advantages and novel features of the present disclosure will become apparent from the following detailed description. DETAILED DESCRIPTION

[0011] Aspects of the present disclosure are disclosed in the following descriptions related to specific embodiments. Alternative embodiments may be designed without departing from the scope of the present disclosure. In addition, well-known embodiments of the present disclosure may not be described in detail or will be omitted so as not to obscure the relevant details of the present disclosure. Further, to facilitate understanding of the present specification, several terms used herein are discussed below.

[0012] As used herein, the word "exemplary" means "serving as an example, instance, or illustration." The embodiments described herein are not limiting, but merely exemplary. It should be understood that the described embodiments are not necessarily to be construed as preferred or advantageous over other embodiments. Furthermore, the term "embodiment" does not require that all embodiments include the discussed features, advantages, or modes of operation.

[0013] The present disclosure as a whole relates to coatings that provide advantageous improvements over current coatings. It has been discovered that the use of a specific coating composition comprising at least one non-aqueous dispersion (NAD) acrylic alkyd polymer, at least one non-aqueous dispersion (NAD) acrylic polymer, or a combination thereof, and at least one siloxane can surprisingly result in improved performance properties, i.e., drying time and tack, application, when used in a coating, while having reduced VOCs and without sacrificing other performance properties, such as weatherability, abrasion resistance, adhesion, and mold, mildew, and algae resistance, among other advantages. Specifically, a coating composition comprising at least one non-aqueous dispersion (NAD) acrylic alkyd polymer, at least one non-aqueous dispersion (NAD) acrylic polymer, or a combination thereof, and at least one siloxane can have improved properties with the addition of both reactive and non-reactive diluents. Additionally, siloxanes can reduce film building for higher solid systems where the NAD has an NVM of at least 70%. Siloxanes can reduce film building for higher solid systems where the NAD has an NVM of at least 65%. In one embodiment, the siloxane can reduce film building in higher solids systems where the NAD has a NVM of at least 70%.

[0014] Non-aqueous dispersions (NADs) are well known in the art and generally consist of a dispersion of an addition polymer in a relatively non-polar, non-aqueous liquid. High solids NADs, especially those of at least 70% NVM, have lower VOCs of less than 250 g / l and provide stability, filterability, low particle size, acceptable viscosity, and tack-free and drying times when formulated into coatings.

[0015] The method for preparing NAD comprising alkyd acrylic polymer comprises using at least one alkyd resin as a dispersion medium for polymerization of monomers that are primarily insoluble in the alkyd medium. In some embodiments, the alkyd resin can be prepared according to any of the conventional methods for preparing alkyd resins readily available in the art, or the alkyd resin can be prepared such as by esterification of fatty acids or alcoholysis of drying oils followed by reaction with dibasic or tribasic acids. In other embodiments, the alkyd resin can be prepared in a two-step process, wherein the first step comprises an acidolysis reaction of a triglyceride oil with a trifunctional carboxylic acid or a trifunctional anhydride, and the second step comprises reacting the product of the first step with a polyfunctional alcohol. To form the alkyd resin, the triglyceride oil is first reacted with a trifunctional carboxylic acid (such as trimellitic acid, trimesic acid, 1,3,5-pentanetricarboxylic acid, citric acid) or a trifunctional anhydride (such as trimellitic anhydride, trimesic anhydride, or a mixture of such acids and / or anhydrides) via an acidolysis reaction. The intermediate from the acidolysis step is further reacted with a trifunctional alcohol (selected from trimethylolpropane, trimethylolethane, glycerine, trishydroxyethyl isocyanurate or a combination thereof) alone or in combination with a difunctional alcohol (selected from ethylene glycol, propylene glycol, cyclohexanedimethanol or a combination thereof). In addition, dimethylolpropionic acid can be used in combination with the trifunctional alcohol. Trifunctional alcohols are particularly preferred due to the degree of branching they allow. If used, the difunctional alcohol is preferably used as a minor component in combination with the trifunctional alcohol. Depending on the desired molecular weight and viscosity, a portion of the monofunctional alcohol or monoacid such as soybean fatty acid, linseed oil fatty acid or crotonic acid (which is up to about 20% by weight of the total alkyd resin) can be added with the multifunctional alcohol to control the molecular weight and act as a chain terminator. The triglyceride oil for forming the alkyd resin can be selected from linseed oil, soybean oil, coconut oil, cottonseed oil, peanut oil, rapeseed oil, corn oil, safflower oil, sunflower oil, dehydrated castor oil, fish oil, perilla, lard, walnut oil, tung oil or a combination thereof. Particularly preferred are those oils having unsaturation in the glyceride chain. Particularly preferred are soybean oil, dehydrated castor oil and linseed oil.

[0016] In some embodiments, the alkyd resin can be a modified alkyd resin. The alkyd resin can be used alone or in combination with some small amounts of hydrocarbon solvents, aromatic compound solvents, polar solvents, ketone solvents, ester solvents or alcohol solvents, or in combination with other small amounts of alkyd resins, modified alkyd resins or hydrocarbon dispersion media.

[0017] In many embodiments, the molecular weight M of the resulting alkyd resin is z Should be greater than or equal to about 20,000. In some embodiments, the oil length should be between about 65% and 85%. In other embodiments, the hydroxyl number should be less than 60, preferably less than 45.

[0018] When using the above-mentioned novel alkyd resin to prepare non-aqueous dispersions, monomers should be selected from monomers that can prepare polymers that are mainly insoluble in alkyd resin media via free radical addition reaction mechanisms. In many embodiments, at least one monomer in the monomer contains hydroxyl functional groups. In many embodiments, the monomer charge between about 5% by weight and 45% by weight comprises hydroxyl functional monomers. Suitable monomers can be selected from esters of acrylonitrile, methacrylonitrile, acrylic acid, methacrylic acid and these acids, especially hydroxyethyl acrylate and hydroxyethyl methacrylate, hydroxypropyl acrylate and hydroxypropyl methacrylate, methyl acrylate and methyl methacrylate, ethyl acrylate and ethyl methacrylate, butyl acrylate and butyl methacrylate, lauryl acrylate and lauryl methacrylate, etc., trimethylolpropane triacrylate and trimethylolpropane trimethacrylate, diacrylate hexanediol ester, acrylamide and methacrylamide. Other monomers are also envisioned. In some embodiments, in addition to pure monomers, preformed polymers and polymer intermediates may also be included in the reaction charge.

[0019] For NADs comprising acrylic polymers, the monomers should be selected from monomers that can generate a polymer in an insoluble medium via a free radical addition reaction mechanism. Suitable monomers can be selected from acrylonitrile, methacrylonitrile, acrylic acid, methacrylic acid, and esters of these acids, especially hydroxyethyl acrylate and methacrylate, hydroxypropyl acrylate and methacrylate, methyl acrylate and methacrylate, ethyl acrylate and methacrylate, butyl acrylate and methacrylate, lauryl acrylate and methacrylate, etc., trimethylolpropane triacrylate and trimethylolpropane trimethacrylate, hexanediol diacrylate, acrylamide, and methacrylamide. Other monomers are also contemplated. In some embodiments, in addition to pure monomers, preformed polymers and polymer intermediates may also be included in the reaction charge.

[0020] In many embodiments, about 10% to 99.5% by weight of the coating composition comprises at least one non-aqueous dispersion (NAD) acrylic alkyd polymer, at least one non-aqueous dispersion (NAD) acrylic polymer, or a combination thereof. In some embodiments, the at least one non-aqueous dispersion (NAD) acrylic alkyd polymer, at least one non-aqueous dispersion (NAD) acrylic polymer, or a combination thereof of the coating composition may be, for example, from about 10% to about 95%, from about 10% to about 90%, from about 10% to about 85%, from about 10% to about 80%, from about 10% to about 75%, from about 10% to about 70%, from about 10% to about 65%, from about 10% to about 60%, from about 10% to about 55%, from about 10% to about 50%, from about 15% to about 95%, from about 15% to about 90%, from about 15% to about 85%, from about 15% to about 80%, from about 15% to about 75%, from about 15% to about 70%, from about 15% to about 65%. %, about 15% to about 60%, about 15% to about 55%, about 15% to about 50%, about 20% to about 95%, about 20% to about 90%, about 20% to about 85%, about 20% to about 80%, about 20% to about 75%, about 20% to about 70%, about 20% to about 65%, about 20% to about 60%, about 20% to about 55%, about 20% to about 50%, about 25% to about 95%, about 25% to about 90%, about 25% to about 85%, about 25% to about 80%, about 25% to about 75%, about 25% to about 70%, about 25% to about 65%, about 25% to about 60%, about 20% to about 55%, about 20% to about 50%, about 25% to about 95%, about 25% to about 90%, about 25% to about 85%, about 25% to about 80%, about 25% to about 75%, about 25% to about 70%, about 25% to about 65%, about 25% to about 60%, about 25% to about 55%, about 25 ...%. Other ranges are also contemplated.

[0021] In many embodiments, if the VOC of the coating composition is 250 g / l or less, as measured by ASTM D3960, about 10 wt% to 60 wt% of the coating composition comprises at least one non-aqueous dispersion (NAD) acrylic alkyd polymer, at least one non-aqueous dispersion (NAD) acrylic polymer, or a combination thereof. In some embodiments, if the VOC of the coating composition is 250 g / l or less, as measured by ASTM D3960, about 10 wt% to 60 wt% of the coating composition comprises at least one non-aqueous dispersion (NAD) acrylic alkyd polymer, at least one non-aqueous dispersion (NAD) acrylic polymer, or a combination thereof. D3960, the at least one non-aqueous dispersion (NAD) acrylic alkyd polymer of the coating composition may be, for example, from about 10% to about 95%, from about 10% to about 55%, from about 10% to about 50%, from about 10% to about 45%, from about 10% to about 40%, from about 10% to about 35%, from about 10% to about 30%, from about 10% to about 25%, from about 10% to about 20%, from about 15% to about 55%, from about 15% to about 50%, from about 15% to about 45%, from about 10% to about 40%, from about 15% to about 35%, from about 10% to about 30%, from about 10% to about 25%, from about 10% to about 20%, from about 15% to about 55%, from about 15% to about 50%, from about 15% to about 45%, from about 15% to about 40%, from about 15% to about 35%, from about 10% to about 30%, from about 10% to about 25%, from about 10% to about 20%, In some embodiments, the present invention relates to an aqueous solution of at least one molecule of the present invention and to a aqueous solution of at least one molecule of the present invention. The aqueous solution of at least one molecule of the present invention is preferably at least one molecule of the present invention, wherein the aqueous solution of at least one molecule of the present invention is at least one molecule of the present invention. In some embodiments, the aqueous solution of at least one molecule of the present invention is preferably at least one molecule of the present invention, wherein the aqueous solution of at least one molecule of the present invention is at least one molecule of the present invention.

[0022] In many embodiments, the coating composition has a VOC of 500 g / l or less, as measured by ASTM D3960. In some embodiments, the coating composition described herein has a volatile organic compound (VOC) of less than 250 g / l as measured by ASTM D3960. In other embodiments, the coating composition described herein may have a volatile organic compound (VOC) of less than 450 g / l, less than 400 g / l, less than 350 g / l, less than 300 g / l, less than 275 g / l, less than 225 g / l, less than 200 g / l, less than 175 g / l, less than 150 g / l, less than 125 g / l, less than 100 g / l, less than 75 g / l, less than 50 g / l, and less than 25 g / l as measured by ASTM D3960. Lower and higher levels of VOC are also contemplated.

[0023] In many embodiments, the coating composition has a volatile organic compound content of less than about 250 g / L according to EPA M24. In other embodiments, the coating compositions described herein may have a volatile organic compound (VOC) of less than 225 g / l, less than 200 g / l, less than 175 g / l, less than 150 g / l, less than 125 g / l, less than 100 g / l, less than 75 g / l, less than 50 g / l, and less than 25 g / l as measured by EPA M24. Lower and higher levels of VOC are also contemplated.

[0024] In many embodiments, the non-aqueous dispersion (NAD) acrylic alkyd polymer, at least one non-aqueous dispersion (NAD) acrylic polymer, or a combination thereof comprises at least one acrylic having a glass transition temperature (Tg) of 20°C to 60°C as measured by differential scanning calorimetry (DSC) using ASTM D6604-00. In other embodiments, the glass transition temperature (Tg) of the non-aqueous dispersion (NAD) acrylic alkyd polymer comprising at least one acrylic acid may be, for example, in the range of 20°C to 55°C, 20°C to 50°C, 20°C to 45°C, 25°C to 60°C, 25°C to 55°C, 25°C to 50°C, 25°C to 45°C, 30°C to 60°C, 30°C to 55°C, 30°C to 50°C, 35°C to 60°C, 35°C to 55°C, and 40°C to 60°C as measured by differential scanning calorimetry (DSC) using ASTM D6604-00.

[0025] In many embodiments, from about 0.5% to about 20% by weight of the coating composition comprises at least one siloxane. In some embodiments, the at least one siloxane of the coating composition may range, for example, from about 1% to 20%, about 1% to 18%, about 1% to 15%, about 1% to 12%, about 1% to 10%, about 2% to 20%, about 2% to 18%, about 2% to 15%, about 2% to 12%, about 2% to 10%, about 3% to 20%, about 3% to 15%, about 3% to 12%, about 3% to 10%, about 5% to 20%, about 5% to 18%, about 5% to 15%, about 5% to 12%, about 7% to 20%, about 7% to 18%, about 7% to 15%, about 7% to 12%, about 10% to 20%, about 10% to 18%, about 10% to 15%, about 12% to 20%, and about 12% to 18% (by weight).

[0026] In many embodiments, at least one siloxane is cyclic, linear, or a combination thereof. In some embodiments, at least one siloxane is a methylsiloxane. In one embodiment, at least one siloxane is a volatile methylsiloxane (VMS). In some embodiments, the methylsiloxane includes cyclotetrasiloxane, cyclopentasiloxane cyclohexasiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, trisiloxane, polydimethylsiloxane, or a combination thereof. Other modified siloxanes are also contemplated.

[0027] In many embodiments, at least one siloxane is a siloxane fluid. In many embodiments, at least one siloxane is a volatile methyl siloxane (also known as VMS). In certain embodiments, VMS has a flash point of at least 100°F (37°C) as measured by ASTM D93. In one embodiment, the siloxane has the following structure 1:

[0028]

[0029] In some embodiments, at least one siloxane is an alkylmethylsiloxane. In one embodiment, the siloxane has the following structure 2:

[0030]

[0031] In one embodiment, the coating composition described herein also includes at least one hyperbranched alkyd polymer. In many embodiments, many hyperbranched alkyd polymers commonly used are envisioned. In some embodiments, the hyperbranched alkyd polymer does not significantly increase the viscosity of the coating composition. The amount of oil, acid and alcohol should be such that the resulting alkyd polymer can have a higher degree of branching and an oil length between about 65% and 85%, and a hydroxyl number less than 80. In some embodiments, the hydroxyl number is less than 70. In some embodiments, the hydroxyl number is less than 60. In some embodiments, the hydroxyl number is less than 50. In some embodiments, the hydroxyl number is less than 45. In some embodiments, about 0 wt % to about 20 wt % of the coating composition includes at least one hyperbranched alkyd polymer. In some embodiments, the at least one hyperbranched alkyd polymer of the coating composition may be present, for example, in an amount of about 0.5% to 20%, about 0.5% to 18%, about 0.5% to 15%, about 0.5% to 12%, about 0.5% to 10%, about 1% to 20%, about 1% to 18%, about 1% to 15%, about 1% to 12%, about 1% to 10%, about 0.5% to 20%, about 2% to 20%, about 2% to 18%, about 2% to 15%, about 2% to 12%. %, about 2% to 10%, about 3% to 20%, about 3% to 15%, about 3% to 12%, about 3% to 10%, about 5% to 20%, about 5% to 18%, about 5% to 15%, about 5% to 12%, about 7% to 20%, about 7% to 18%, about 7% to 15%, about 7% to 12%, about 10% to 20%, about 10% to 18%, about 10% to 15%, about 12% to 20%, and about 12% to 18% (by weight). Other ranges are also contemplated.

[0032] In some embodiments where a non-aqueous dispersion (NAD) acrylic alkyd polymer is in the coating composition, the at least one hyperbranched alkyd polymer is obtained by reacting at least one fatty acid with at least one hyperbranched polyol. In other embodiments, the at least one hyperbranched polyol comprises at least one polyester.

[0033] In one embodiment where a non-aqueous dispersion (NAD) acrylic alkyd polymer is in the coating composition, the coating composition described herein further comprises at least one alkyd resin. In some embodiments, from about 10% to about 40% by weight of the coating composition comprises at least one alkyd resin.

[0034] In addition, as used herein, various additives refer to general categories of components or other raw materials that can be added to the compositions herein to promote various properties. In many embodiments, the coating composition may also include at least one reactive diluent, at least one non-reactive diluent, at least one solvent, at least one drying agent, at least one colorant, at least one pigment, at least one dispersant, at least one surfactant, at least one wax, at least one anti-skinning agent, at least one defoamer, at least one fungicide, at least one biocide, at least one mildewcide, at least one thickener, at least one UV stabilizer, or a combination thereof.

[0035] In many embodiments, the coating compositions described herein are wood stains. In one embodiment, the coating compositions described herein are semi-transparent wood stains or semi-solid wood stains. In one embodiment, the coating compositions described herein are solid color wood stains. In another embodiment, the coating compositions described herein are clear coatings. In one embodiment, the coating compositions described herein are primers. In other embodiments, the coating compositions described herein are basecoats. In some other embodiments, the coating compositions described herein are topcoats.

[0036] Also described herein are methods of making the coatings described herein, the coatings comprising at least one non-aqueous dispersion (NAD) acrylic alkyd polymer, at least one non-aqueous dispersion (NAD) acrylic polymer, or a combination thereof, and at least one siloxane.

[0037] Also described are methods of applying the coating compositions described herein at least in part to at least one substrate. In many embodiments, at least one substrate is wood, metal, glass, plastic, paper, leather, fabric, ceramic, concrete, composite material, or a combination thereof. The wood may include pine (including southern yellow pine), cedar, redwood, teak, ipe, oak, Douglas fir, tabby, ferns, mahogany, balata (also known as bulletwood), and other wood suitable for deck planking. Additionally, the wood may be pressure treated with various chemicals to protect the wood from structural degradation and termites and other wood-destroying insects, mold, decay fungi, marine conditions, and flames. These chemicals for pressure treatment may include, but are not limited to, basic quaternary ammonium copper (ACQ) and micronized versions thereof, ammonium copper zinc arsenate (ACZA), ammoniated copper arsenite (ACA), chromated copper arsenate (CCA) and micronized versions thereof, acidic copper chromate (ACC), copper-HDO (bis-(n-cyclohexyldiazenedioxy-copper)), propiconazole, isothiazolinone, triazolone, copper naphthenate, copper azole, polymerized betaine, borate, pentachlorophenol, creosote, or combinations thereof. Other chemicals for pressure treatment are also contemplated. In one embodiment, at least one substrate is a pre-coated substrate. In many embodiments, at least partially applying the coating may be accomplished by brushing, roller coating, spraying (air atomization coating, airless coating, high volume low pressure (HVLP) coating, and electrostatic coating), patting, dipping, roller coating, spin coating, flow coating, curtain coating, centrifugal coating, continuous coating, and automatic deposition. Other application methods are also contemplated.

[0038] In many embodiments, articles comprising the coating compositions described herein are also disclosed. In some embodiments, the articles may include: 1) a substrate having at least one surface; and 2) a coating composition described herein. In some embodiments, the substrate is wood, metal, glass, plastic, paper, leather, fabric, ceramic, concrete, composite material, or a combination thereof. In other embodiments, the substrate is a pre-coated substrate. The pre-coated substrate may be a substrate covered with a water-based coating or a solvent-based coating. In many embodiments, the pre-coated substrate includes a coating. In yet another embodiment, the pre-coated substrate includes at least one additional coating. In many embodiments, at least one additional coating may include a solvent-based or water-based coating. In one embodiment, at least one additional coating may be different from the coating composition described herein. In another embodiment, at least one additional coating may be the same as the coating composition described herein.

[0039] Experimental Results

[0040] The following samples were prepared in Table 1 below and the results are provided below.

[0041] Table 1: Stain preparation and test results

[0042]

[0043] Several samples were prepared in which a conventional high solid (HS) alkyd resin (in the control formulation) was combined with other formulations (Samples 1-4) to which different levels of NAD alkyd acrylic polymer and at least one siloxane were added. In Sample 5, the conventional high solid (HS) alkyd resin was completely replaced by NAD alkyd acrylic polymer and at least one siloxane.

[0044] For testing, EPA M24 was used to measure volatile organic compounds (VOC) and recorded in grams per liter. ASTM D1475 was used to measure weight per gallon and recorded in pounds per gallon. ASTM D562 was used to measure viscosity and recorded in Krebs units (KU). For non-tack measurements on Leneta charts (both sealed and unsealed sides were pure white), coatings were applied to Leneta charts and tested at their respective time intervals. ASTM D523 was used to measure gloss at 60 °.

[0045] From Table 1, replacing a conventional high solids (HS) alkyd resin (control) with NAD alkyd acrylic polymer and volatile methylsiloxane (also referred to as VMS) (Sample 5) provides a lower calculated VOC (in grams per liter). In addition, the calculated VOC of the NAD alkyd acrylic polymer and VMS (Sample 5) is also less than those samples where some (Sample 2) or all (Sample 4) of the conventional high solids (HS) alkyd resin is replaced with NAD. In addition, the use of the NAD alkyd acrylic polymer and VMS (Sample 5) provides improved tack-free results over the conventional high solids (HS) alkyd resin (control) and partial replacement of the conventional high solids (HS) alkyd resin (control) with the NAD alkyd acrylic polymer (Samples 2 and 3). In addition, the viscosity of the NAD alkyd acrylic polymer and VMS (Sample 5) is acceptable.

[0046] Implementation

[0047] The following embodiments are contemplated. All combinations of features and embodiments are contemplated.

[0048] Embodiment 1: A coating composition comprising: at least one non-aqueous dispersion (NAD) acrylic alkyd polymer, at least one non-aqueous dispersion (NAD) acrylic polymer, or a combination thereof; and at least one siloxane.

[0049] Embodiment 2: An embodiment according to embodiment 1, wherein about 10 weight percent to 99.5 weight percent of the coating composition comprises at least one non-aqueous dispersion (NAD) acrylic alkyd resin polymer, at least one non-aqueous dispersion (NAD) acrylic polymer, or a combination thereof.

[0050] Embodiment 3: According to any one of embodiments 1-2, the non-aqueous dispersion (NAD) acrylic alkyd resin polymer, at least one non-aqueous dispersion (NAD) acrylic polymer, or a combination thereof comprises at least one acrylic having a glass transition temperature (Tg) of 20°C to 60°C, as measured by differential scanning calorimetry (DSC) using ASTM D6604-00.

[0051] Embodiment 4: The embodiment according to any one of embodiments 1-3, wherein about 0.5 wt % to about 20 wt % of the coating composition comprises the at least one siloxane.

[0052] Embodiment 5: The embodiment according to any one of embodiments 1-4, wherein the at least one siloxane is cyclic, linear, or a combination thereof.

[0053] Embodiment 6: An embodiment according to any one of embodiments 1-5, wherein the at least one siloxane is a methyl siloxane.

[0054] Embodiment 7: The embodiment according to embodiment 6, wherein the methylsiloxane comprises cyclotetrasiloxane, cyclopentasiloxane cyclohexasiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, trisiloxane, polydimethylsiloxane, or a combination thereof.

[0055] Embodiment 8: An embodiment according to any one of embodiments 1-7, further comprising at least one hyperbranched alkyd resin.

[0056] Embodiment 9: The embodiment according to embodiment 8, wherein from about 0% to about 20% by weight of the coating composition comprises the at least one hyperbranched alkyd polymer.

[0057] Embodiment 10: The embodiment according to any one of embodiments 8-9, wherein the at least one hyperbranched alkyd polymer is obtained by reacting at least one fatty acid with at least one hyperbranched polyol.

[0058] Embodiment 11: The embodiment according to any of embodiments 8-10, wherein the at least one hyperbranched polyol comprises at least one polyester.

[0059] Embodiment 12: According to any one of embodiments 1-11, the embodiment further comprises at least one alkyd resin.

[0060] Embodiment 13: The embodiment according to embodiment 12, wherein from about 10% to about 40% by weight of the coating composition comprises the at least one alkyd resin.

[0061] Embodiment 14: The embodiment according to any one of embodiments 1-13, wherein the coating composition further comprises at least one reactive diluent, at least one non-reactive diluent, at least one solvent, at least one drying agent, at least one colorant, at least one pigment, at least one dispersant, at least one surfactant, at least one wax, at least one anti-skinning agent, at least one defoaming agent, at least one fungicide, at least one biocide, at least one mildewcide, at least one thickener, at least one UV stabilizer, or a combination thereof.

[0062] Embodiment 15: The embodiment of any one of embodiments 1-14, wherein the coating composition is a wood stain.

[0063] Embodiment 16: The embodiment of any one of embodiments 1-15, wherein the coating composition has a volatile organic compound content of less than about 250 g / L according to EPA M24.

[0064] Embodiment 17: A method of preparing the coating composition according to any one of Embodiments 1-16.

[0065] Embodiment 18: A method of at least partially applying the coating composition of any of Embodiments 1-16 to at least one substrate.

[0066] Embodiment 19: The embodiment according to embodiment 18, wherein at least one substrate is wood, metal, glass, plastic, paper, leather, fabric, ceramic, concrete, composite material, or a combination thereof.

[0067] Embodiment 20: The embodiment described in embodiment 18, wherein at least one substrate is a pre-coated substrate.

[0068] Embodiment 21: An article comprising the coating composition of any one of Embodiments 1-16.

[0069] The above content includes examples of the claimed subject matter. All details and any modifications described in conjunction with the background and specific embodiments will be apparent to those skilled in the art within the essence and scope of the claimed subject matter. In addition, it should be understood that the aspects of the claimed subject matter and the various embodiments and various features described below and / or in the attached claims can be combined or interchanged in whole or in part. In the foregoing description of various embodiments, those embodiments that refer to another embodiment can be appropriately combined with other embodiments, as will be recognized by those skilled in the art. In addition, it will be recognized by those of ordinary skill in the art that the foregoing description is presented only as an example and is not intended to limit the claimed subject matter, recognizing that many other combinations and arrangements of the claimed subject matter are possible. Of course, for the purpose of describing the claimed subject matter, it is impossible to describe every conceivable combination of components or methods, but those of ordinary skill in the art can recognize these. Therefore, the claimed subject matter is intended to cover all such changes, modifications and variations that fall within the essence and scope of the attached claims. In addition, with respect to the use of the term "including" in the specific embodiments or claims, such terms are intended to be inclusive in a manner similar to the term "including" being interpreted as "including" when used as a transitional word in the claims.

Claims

1. A coating composition, comprising: at least one non-aqueous dispersion (NAD) acrylic alkyd polymer, at least one non-aqueous dispersion (NAD) acrylic alkyd polymer, or a combination thereof; and At least one siloxane.

2. The coating composition of claim 1, wherein about 10 wt. % to 99.5 wt. % of the coating composition comprises the at least one non-aqueous dispersion (NAD) acrylic alkyd polymer, at least one non-aqueous dispersion (NAD) acrylic alkyd polymer, or a combination thereof.

3. The coating composition of any one of claims 1-2, wherein the non-aqueous dispersion (NAD) acrylic alkyd polymer, at least one non-aqueous dispersion (NAD) acrylic alkyd polymer, or a combination thereof comprises at least one acrylic having a glass transition temperature (Tg) of 20°C to 60°C as measured by differential scanning calorimetry (DSC) using ASTM D6604-00.

4. The coating composition of any one of claims 1-3, wherein from about 0.5 wt. % to about 20 wt. % of the coating composition comprises the at least one siloxane.

5. The coating composition of any one of claims 1-4, wherein the at least one siloxane is cyclic, linear, or a combination thereof.

6. The coating composition of any one of claims 1 to 5, wherein the at least one siloxane is a methyl siloxane.

7. The coating composition of claim 6, wherein the methylsiloxane comprises cyclotetrasiloxane, cyclopentasiloxane cyclohexasiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, trisiloxane, polydimethylsiloxane, or a combination thereof.

8. The coating composition of any one of claims 1 to 7, further comprising at least one hyperbranched alkyd polymer.

9. The coating composition of claim 8, wherein from about 0% to about 20% by weight of the coating composition comprises the at least one hyperbranched alkyd polymer.

10. The coating composition according to any one of claims 8-9, wherein the at least one hyperbranched alkyd polymer is obtained by reacting at least one fatty acid with at least one hyperbranched polyol.

11. The coating composition of any one of claims 8-10, wherein the at least one hyperbranched polyol comprises at least one polyester.

12. The coating composition of any one of claims 1 to 11, further comprising at least one alkyd resin.

13. The coating composition of claim 12, wherein from about 10% to about 40% by weight of the coating composition comprises the at least one alkyd resin.

14. The coating composition of any one of claims 1-13, wherein the coating composition further comprises at least one reactive diluent, at least one non-reactive diluent, at least one solvent, at least one drying agent, at least one colorant, at least one pigment, at least one dispersant, at least one surfactant, at least one wax, at least one anti-skinning agent, at least one defoamer, at least one fungicide, at least one biocide, at least one mildewcide, at least one thickener, at least one UV stabilizer, or a combination thereof.

15. The coating composition of any one of claims 1-14, wherein the coating composition is a wood stain.

16. The coating composition of any one of claims 1-15, wherein the coating composition has a volatile organic compound content of less than about 250 g / L according to EPAM 24.

17. A method for preparing the coating composition according to any one of claims 1 to 16.

18. A method of at least partially applying a coating composition according to any one of claims 1 to 16 to at least one substrate.

19. The method of claim 18, wherein at least one substrate is wood, metal, glass, plastic, paper, leather, fabric, ceramic, concrete, a composite material, or a combination thereof.

20. The method of claim 18, wherein at least one substrate is a pre-coated substrate.

21. An article comprising the coating composition according to any one of claims 1 to 16.

Images