WOOD COATING COMPOSITES WITH HIGH SOLID CONTENT BASED ON TRIGLYCERIDE OIL

Abstract

The present invention concerns an improved high-solids wood coating composition where the said high-solids wood coating composition, in proportion to the total weight of the said high-solids wood coating composition, comprises 60.00 to 99.00 weight percent of a triglyceride oil composition, where the triglyceride oil composition comprises, preferably, in proportion to the total weight of the triglyceride oil composition, 40.00 to 100.00 wt.-% of at least one first drying oil; and 60.00 to 0.00 wt.-% of at least one second drying oil; 0.01 to 2.00 weight percent of at least one metallic-based drying agent; 0.50 to 10.00 wt.-% of at least one acylphosphine oxide photoinitiator; α-hydroxyalkylphenone photoinitiator according to Formula (I P2), where the α-hydroxyalkylphenone photoinitiator is present in an amount determined by a weight ratio of the α-hydroxyalkylphenone photoinitiator to at least one acylphosphine oxide photoinitiator, in the range of 0.5 to 10.0; equal to or less than 5.00 wt.-% of at least one radical polymerizable (meth)acrylic-functionalized compound; and where the said high-solids wood coating composition has a total solids content equal to or greater than 90.00 wt.-% in relation to the total weight of the said high-solids wood coating composition, and where the total solids content of the said high-solids wood coating composition has been measured according to standard ASTM D2369 – 20.

Description

BE2025 / 5130 2 people used. Even today, wooden furniture, floors, and household items are still very popular. Wood is extremely versatile and stable and at the same time very easy to work with, but it is also sensitive to external influences such as dirt accumulation, wear, humidity, temperature fluctuations, or microorganisms. For example, solid hardwood floors and engineered wood floors have long been particularly popular in homes because they are associated with warmth, tradition, and durability. However, hardwood floors are particularly susceptible to damage from heavy foot traffic, wear, and moisture. Therefore, wood coating compounds have been applied to hardwood floors for years to protect the wood against deterioration, scratches, stains, discoloration, moisture, and wear from foot traffic, and at the same time, if desired, to bring out the appearance of the hardwood floor optimally. Today there are numerous various wood coating compositions for solid hardwood floors and engineered wood floors, where each of those wood coating compositions a orexhibit additional properties such as dirt repellency, water repellency, wear resistance, scratch resistance, matting effect, anti-blocking effects and anti-slip properties. In addition, every wood coating must meet individual requirements depending on the use of the wood product. This constantly presents developers of wood coatings with new challenges. At this moment, a wide range of wood coating compositions are available on the market under various names, including varnish, lacquer, wood oil, hardwax oil, stain, Danish oil, lacquer paint, wood finish, etc. In general, these wood coating compositions are usually divided into three different types based on the presence of or the type of solvent used for the formulation of the said wood coating compositions. In this context, a distinction can be made between i) water-based wood coating compositions, ii) organic solvent-based wood coating compositions, and iii) high-solids wood coating compositions which are essentially freeare free of volatile components, i.e.: those latter wood coating compositions are essentially free of water and one or more organic solvents. 2025 / 5130 BE2025 / 5130 3 Water-based wood coating compositions are aqueous emulsions or aqueous dispersions of one or more of, for example, acrylate polymers, polyurethanes, alkyd resins, drying oils, etc. These water-based wood coating compositions may contain more than 30% by weight of water, and often up to as much as 70% by weight of water. In this respect, reference may be made to the two-component coating composition system disclosed in patent WO2019 / 004922A1, where the said coating composition system contains a second coating composition comprising a water-based dispersion comprising polyurethanes, polyacrylates, and polyurethane-acrylate hybrids. Reference may also be made to the disclosure of the patent. WO2006 / 109432A1, which concerns a curable aqueous two-component composition comprising an aqueous emulsion of a polyurethane alkyd resin. Depending on the chemical formulation,Water-based wood coating compositions are characterized by a wide range15 of different technical properties, in particular technical properties such as appearance, feel, mechanical and / or chemical resistance, etc. However, due to the presence of significant amounts of water, the application of water-based coating compositions to water-sensitive wood types or species can lead to20 unwanted fiber swelling (water thickening or fiber thickening). Fiber swelling, i.e. the raising of wood fibers individually or in bundles when water is applied to wood surfaces, is one of the reasons why some companies are reluctant or less inclined to finish wood products with water-based coatings. After all, wood fiber swelling is a significant problem associated with the use of water-based stains. When a water-based wood coating composition is used to coat wood surfaces, fibers can stand upright or protrude from the wood, giving the paint finish a dull appearance and a rough surface.grants. This is mainly due to the swelling of the wood fibers as a result of water absorption. Consequently, after applying a water-based wood coating composition to a wood surface, additional processing steps such as sanding are often required to obtain a smooth wood surface after coating. Oak, a popular option for solid hardwood floors, is particularly susceptible to fiber swelling when coated with water-based wood coating compositions. Organic solvent-based wood coating compositions contain 5 binding resins, such as alkyd resins. These organic solvent-based wood coating compositions contain at least 10% by weight of one or more organic solvents, and often up to as much as 40% by weight of one or more organic solvents. Since organic solvent-based wood coating compositions contain no water, they do not cause fiber swelling when applied to wood products to coat wood surfaces. Although wood coating compositions basedAlthough organic solvents are still widely used today, they are increasingly coming under pressure due to health, safety, and environmental problems and perspectives associated with the use of significant quantities of organic solvents. After all, the evaporation of organic solvents contributes significantly to the emission of volatile organic compounds (VOCs) during the physical drying of organic solvent-based coatings. Wood coating compositions with a high solids content are essentially free of volatile compounds, i.e. those wood coating compositions are essentially free of water and one or more organic solvents, which means that they often contain less than 5% by weight and usually less than 0.5% by weight of volatile compounds. The emission of volatile organic compounds (VOCs) as a source of air pollution in urban environments can be significantly reduced by the use of solvent-free polymerizable resins. Since there are no physicalevaporation of water or organic solvents takes place when they are applied to wood surfaces, the final mechanical properties of the resulting coatings depend solely on the occurrence of chemical crosslinking at room temperature after application. In addition, because no dilution takes place as a result of the presence of 2025 / 5130 BE2025 / 5130 5 water or organic solvents, the viscosity of the reactive components of such high-solids wood coating compositions must be sufficiently low to make their application possible. Widely known, and one of the oldest examples of such high-solids wood coating compositions, are naturally occurring unsaturated drying triglyceride oils, such as linseed oil or tung oil, which have been used for coating applications since prehistoric times. Of those unsaturated drying triglyceride- It is known that oils chemically crosslink in the presence of and by reaction with atmospheric oxygen to form a solid coating layer. DryingTriglyceride oils such as linseed oil, tung oil, or poppy seed oil are highly unsaturated and polymerize when exposed to molecular oxygen via a free radical chain reaction mechanism known as autooxidation. Autooxidation proceeds via a free radical chain reaction mechanism that involves the formation of lipid radicals (initiation phase), followed by propagation via their reaction with oxygen to form lipid peroxyl radicals that can extract hydrogen atoms from lipids, thereby regenerating a lipid radical. Ultimately, the process is terminated by radical-radical reactions, resulting in crosslinking. At room temperature, the autooxidation reaction of drying oils often takes place in the presence of one or more added metal-based drying agents or dryers, which increase the reaction rate by lowering the activation energy. The extent of unsaturation in the fatty acid residues of wood compositions based on triglyceride seed oil is therefore of crucial importance for the auto-oxidativedrying or crosslinking process. Although these wood coating compositions based on triglyceride seed oil have been used for centuries to be applied to wood products, particularly as protective coatings or finishes for hardwood floors, due to the advent of modern chemistry, they have largely been replaced as the most commonly used method to protect wood by alkyd resins based on organic solvents because of their better mechanical properties (such as hardness), faster drying or curing, and higher dirt repellency. Since alkyd resins are generally characterized by viscosities that are too high to be applied to wood products using conventional coating methods, such as a polishing machine, a roller, or a brush, significant amounts of one or more organic solvents are required to obtain a workable viscosity. Although wood coating compositions based on organic solvents containing alkyd resins5 are still popular today for coating wood products, withIn the case of hardwood flooring, over the past two decades, a significant shift has taken place away from solvent-based wood coating compositions due to health, safety, and environmental concerns. Some manufacturers have therefore focused on water-based wood coating compositions containing aqueous emulsions or aqueous dispersions of one or more synthetic resins. Although these water-based wood coating compositions can be optimized for good mechanical properties when applied to wood products, the resulting water-based finishes exhibit fiber swelling, as described above, they remain stable for only a short time in an open container and are prone to overlapping, making them more difficult to apply than organic solvent-based wood coating compositions. In recent decades, wood coating compositions based on 20 triglyceride seed oil have regained popularity thanks to their organic (biomass) bases and their sustainable origin, for the above-describedto counteract negative aspects associated with wood coating compositions based on organic solvents and the specific disadvantages and difficulties of water-based wood coating compositions. In particular for coating hardwood floors, two-component wood coating compositions based on triglyceride seed oil have been developed. These two-component wood coating compositions based on triglyceride seed oil remain to this day by far the most popular coating for hardwood floors on the market formulated with drying triglyceride oils as the main component. They consist of a first A-component based on open and drying triglyceride seed oils and a second B-component based on open and aliphatic polyisocyanate, such as trimers of hexamethylene diisocyanate. The mixing of the A- and B- the component before being applied to wood products significantly shortens curing times, resulting in a durable wood coating that can often be applied in a single layer to wood surfaces, particularly hardwoods5floors. Although the combined use of isocyanate-based accelerators in the application of wood coating compositions is still frequently applied today, it is expected that the use of isocyanates will no longer be warranted in the near future due to health, safety, and environmental concerns and the increasing regulatory pressure associated with the use of isocyanates. The difficulties associated with the rate of crosslinking / curing / hardening of wood coating compositions based on triglyceride seed oil, such as the naturally occurring unsaturated drying triglyceride oils linseed oil and tung oil, have been discussed in the literature. In that respect, for example, reference can be made to the publication by Dan Zhang et al. Coatings 2024,14,2., in which that publication describes the effect of acylphosphine oxide photoinitiators on the curing-borne photopolymerization of ultraviolet (UV) curable wax and oil wood coating compositions containing tung oil and beeswax as main components, in the presence ofethyl(2,4,6-trimethylbenzoyl)phenylphosphinate (TPO-L; CAS84434-11-7) as an acylphosphine oxide photoinitiator. By means of UV irradiation experiments using a UV curing machine and coating quality tests, the effects of adding incremental amounts of TPO-L photoinitiator on properties such as surface drying time (see Figure 3),25 in particular the shortening thereof, of wood samples treated with the ultraviolet (UV) curable wax and oil wood coating compositions were investigated. Regarding the addition of acylphosphine oxide photoinitiators in curable wood coating compositions to shorten their drying time, similar observations have been described for solvent-based alkyd resins as for organic solvent-based wood coating compositions. In this respect, reference can be made to the publication by YeG et al. Progress in Organic 2025 / 5130 BE2025 / 5130 8 Coatings2012,73,366–373, in which that publication describes a three-component drying system for photo-assisted oxypolymerization of soybean oil.alkyd resins containing i. a cobalt (Co)-based drying catalyst; ii. a singlet oxygen sensitizer; and iii. bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide (BAPO; CAS162881-26-7) as a cleavable photo-initiating acylphosphine oxide-5 radical generator. Through visible light irradiation experiments, photo-assisted drying of the three-component drying system (and its reaction pathways and kinetics) was investigated, which led to crosslinking of the polymer network. Reference can also be made to the publication by Ryan R. Salata et al. Progress in Organic Coatings 2020, 144, 10 105672, in which that publication describes visible light-curable linseed oil alkyds on a solvent basis that exhibit rapid curing in environmental conditions with the aid of exposure to indoor light. In particular containing the described visible light-curable linseed oil alkyds on a solvent basis i. an oil-alkyd agent from linseed oil; ii.15 a mixture of drying agents based on iron (Fe), zirconium (Zr), and calcium(Ca);iii. an organic solvent mixture of acetone and methyl ethyl ketone (MEK) to reduce the application viscosity; andiv. bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide (BAPO; CAS162881-26-7) as a cleavable photoinitiating acylphosphine oxide radical generator. The authors conclude that the unsaturated fatty acids of alkyds utilize a natural radical autooxidative drying or crosslinking mechanism that can be enhanced by the addition of photoinitiators that are activated in the visible light range (see Table 7), which yields visible light curable alkyds that exhibit accelerated drying and autooxidation under ambient conditions, thereby stimulating efficient crosslinking, especially compared with traditional with UV-curable acrylate-based coatings that must be exposed to UV irradiation to cure. With ultraviolet (UV) curable water-based wood coating compositions that are aqueous emulsions or aqueous dispersions of acrylate polymers and 30 polyurethane-acrylate hybrids with polymerizable (meth)-Moreover, acrylate functionalities must generally be exposed to UV irradiation to cure and crosslink, making effective manual application difficult when applied to wood products to coat wood surfaces. Therefore, it is expected that there will be strong market demand for environmentally friendly and easy-to-apply wood coating compositions with a high solids content based on triglyceride seed oil that are hardenable or curable by transparent light via photo-assisted oxypolymerization and provide rapid hardness development while simultaneously maintaining at least good film formation properties, i.e., without compromising or hindering film formation, as well as good mechanical hardness properties of the resulting layers applied as coatings when wood products are treated with the wood coating compositions, and which do not require the combined use of one or more isocyanate-based accelerators.In view of all the above, there remains a need for improved15 environmentally friendly and easy-to-apply wood coating compositions with high solids content based on triglyceride oil for the preservation and protection of wood products, whereby the said wood coating compositions with high solids content based on triglyceride oil are hardenable or curable by transparent light via photo-assisted20 oxypolymerization, and the said wood coating compositions with high solids content based on triglyceride oil provide a rapid build-up of hardness and at the same time continue to exhibit at least good properties in terms of film formation, i.e. without film formation being compromised or hindered, as well as good mechanical properties in terms of hardness after the application of the said improved coating compositions to wood products, which leads to the formation of layers of the said improved coating compositions applied as coatings on the said wood products, and if not thecombined use requirements of one or more accelerators on a 30 isocyanate basis. 2025 / 5130 BE2025 / 5130 10 SUMMARY OF THE INVENTION The inventors have now surprisingly found that it is possible to provide an improved environmentally friendly wood coating composition with a high solids content that meets the above-mentioned requirements. Therefore, a high-solids wood coating composition [hereinafter composition(C)] is now provided which, in proportion to the total weight of the composition(C), comprises: 60.00 to 99.00% by weight [hereinafter wt.-%] of a triglyceride oil composition, where the triglyceride oil composition comprises, preferably in essence, in proportion to the total weight of the triglyceride oil composition, 40.00 to 100.00 wt.-% of at least one first-drying oil chosen from the group consisting of tung oil, calendula seed oil, bitter gourd seed oil, pomegranate seed oil, enoicica oil; and 60.00 to 0.00 wt.-% of at least one second-drying oil chosen from the group whichconsists of linseed oil, sunflower oil, safflower oil, soybean oil, poppy seed oil, perilla oil, hemp seed oil, cottonseed oil, sesame oil, corn oil, flaxseed oil, grapeseed oil, walnut oil, chia oil, and camelina oil; 0.01 to 2.00 wt. % of at least one desiccant on a 20 metal basis; 0.50 to 10.00 wt.-% of at least one acylphosphine oxide photoinitiator [hereinafter compound(P1)] chosen from bis(4-methylphenyl)(2,4,6-trimethylbenzoyl)phosphine oxide; offenylbis(2,4,6-trimethylbenzoyl)phosphine oxide; 25 α-hydroxyalkylphenone photoinitiator [hereinafter compound(P2)] according to Formula(IP2), where compound(P2) is present in an amount, determined by a weight ratio of compound(P2) to compound(P1), in the range of 0.5 to 10.0; 2025 / 5130 BE2025 / 5130 11 Formula(IP2) equal to or less than 5.00 wt.-% of at least one radical polymerizable(meth)acrylic-functionalised compound; and 5 where the composition(C) has a total solids content equal tois at or greater than 90.00 wt.-% in relation to the total weight of the composition(C), and where the total solid content of the composition(C) is measured according to the standard ASTMD2369–20. In another respect, the present invention further provides a method for the preparation of the composition(C), as set out in detail above. In another respect, the present invention further provides a method for the treatment of a surface or at least part of a surface of a wood product whereby the said wood product is treated with the composition(C), as set out in detail above. According to another aspect, the present invention further provides a coating layer obtained by means of the method for treating the surface or at least part of the surface of the wood product whereby the said wood product is treated with the 20 composition(C), as set out in detail above. DETAILED DESCRIPTION In the context of the present invention, the term “include” should not 25to be interpreted as restrictive to the means listed below; it does not exclude other components, elements or steps. The term should be interpreted in the sense that it specifies the presence of the mentioned properties, numbers, steps or components as indicated in 2025 / 5130 BE2025 / 5130 12, but does not exclude the presence or addition of one or more other properties, numbers, steps or components, or groups thereof. The scope of the expression “a compound comprising components A and B” should therefore not be restricted to compounds consisting solely of components A and B. It means that, as regards the present invention, the only relevant components of the compound are A and B. Accordingly, the terms “comprise” and “contain” include the more restrictive terms “essentially consist of” and “consist of”. The terms "optional" or "possibly", as used here, mean that the event or circumstance described thereafter cannot occur, and that the description includes cases in which the saideventorcircumstanceoccupiescasesin which it does not occur. In particular, in comparison with the traditional ultraviolet (UV) curable wood coatings based on (meth)acrylate which are known to professionals in the field of wood coating compositions and must be exposed to UV irradiation to cure, inventors have now surprisingly found that when in the composition(C) with high solids content of the present invention, as set out in detail above, a certain amount is used of a triglyceride oil composition, as set out in detail above, where the triglyceride oil composition comprises a certain amount of at least one first drying oil, as set out in detail above, where the said first drying oil comprises a certain amount of at least one fatty acid residue with at least three conjugated double bonds, in combination with a certain amount of at least one metal-based drying agent, suchset out in detail above, a certain quantity of at least one acylphosphine oxide photoinitiator, as set out in detail above, and a certain quantity of the α-hydroxyalkylphenone photoinitiator according to Formula(IP2), as set out in detail above, the certain quantity30 of the at least one acylphosphine oxide photoinitiator now exhibits a synergistic interaction with the certain quantity of the α- 2025 / 5130 BE2025 / 5130 13 hydroxyalkylphenone photoinitiator according to Formula(IP2), which leads to an environmentally friendly and easy-to-apply composition(C) with high solids content which is hardenable or curable by transparent light via photo-assisted oxypolymerisation and which now builds up a rapid build-up of hardness exhibits, and at the same time continue to exhibit at least good properties in terms of film formation, i.e. without film formation being compromised or hindered, as well as good mechanical properties in terms of hardness after the said composition(C) has been applied towood products, which leads to the formation of coating layers of the said composition(C) applied to the said wood products, as demonstrated in the experimental section. In combination with a rapid build-up of hardness and good film-forming properties, the inventors have found, in particular surprisingly, that when the high-solids composition(C) of the present invention is applied to wood products, which leads to the formation of coating layers of the said composition(C) applied to the said wood products, a sufficiently high hardness can easily be achieved within a few days after application, or even 24 hours after application, and without further need for or use of one or more isocyanate-based accelerators known to professionals in the field of wood coating compositions for further improvement of the drying properties and kinetics of wood coating compositions (i.e. thereby a shortened drying time or accelerated drying is obtainedpresence of such one or more isocyanate-based accelerators). Moreover, inventors have now surprisingly found that25 when the composition(C) with high solid content of the present invention, as set out in detail above, makes use of the synergistic interaction described above between the specified amount of the at least α-acetylphosphine oxide photo-initiator, as set out in detail above, and the specified amount of the α-hydroxyalkylphenone photo-30 initiator according to Formula (IP2), as set out in detail above, that use yields significant technical advantages, even when the composition(C) 2025 / 5130 BE2025 / 5130 14 is applied to wood products in suboptimal conditions for auto-oxidation drying, such as, for example, at lower temperatures, at higher relative humidity, and / or when the composition(C) additional and contains a large quantity of at least one pigment. The inventors have now surprisingly found that the composition(C) with high 5the solid content of the present invention offers a solution to those difficulties and ensures improved drying performance in diverse conditions. In the context of the present invention, the term “triglyceride oil composition” refers to a liquid unsaturated triglyceride-10 fatty acid oil product of plant origin, which will be crosslinked and hardened / solidified in an oxidative manner by reaction with atmospheric oxygen. In particular, the term “triglyceride oil composition” refers to the combination of all triglycerides, diglycerides, and monoglycerides present in the composition(C) of the present invention. The triglyceride oil composition which forms part of the composition(C), as set out in detail above, may comprise monoglycerides and / or diglycerides, but these, if present, will generally be present in significantly lower amounts or smaller numbers than the triglycerides. Although the triglyceride oil composition essentially consists of glycerides, i.e. the combination oftriglycerides, diglycerides, and monoglycerides, the triglyceride oil composition may also include other constituents, such as free fatty acids, phospholipids, unsaponifiable substances and glycerin. The terms triglycerides, diglycerides, and monoglycerides are terms known among professionals. In the context of the present invention, the terms “triglycerides”, “diglycerides”, and “monoglycerides” respectively stand for fatty acid esters of glycerol (i.e. 1,2,3-propanetriol) in which three, two or one hydroxyl group(s) of glycerol are esterified with three, two or one fatty acids, while the remaining hydroxyl groups, if present, remain unsubstituted. In other words, the terms “triglycerides”, “diglycerides”, and “monoglycerides” respectively represent fatty acid esters of glycerol (i.e. 1,2,3-propanetriol) in which three, two, or one hydroxyl group(s) of glycerol are replaced by three, two, or one fatty acid residue(s) via esterification, while the remaining hydroxyl groups, if present, remain unsubstituted.In the context of the present invention, it should furthermore be assumed that the term “triglyceride oil composition” as used herein excludes the use of one or more alkyd resins. Alkyd resins are known among professionals in the field of wood coating compositions and represent polyesters obtained by subjecting a composition of raw materials to one or more polycondensation reactions (esterification and / or transesterification reactions), whereby the said composition of raw materials i) comprises at least one polycarboxylic acid component, such as orthophthalic acid or isophthalic acid or adipic acid, or the corresponding cyclic carboxylic acid anhydride of the said at least one polycarboxylic acid component, such as phthalic acid anhydride; ii) comprises at least one polyvalent alcohol or polyol component, such as glycerol, ethylene glycol, trimethylolpropane, sorbitol, or penta-erythritol; and iii) at least one monocarbon fatty acid component or the corresponding triglyceride of the said monocarbon fatty acid component. In certain forms of the composition(C) of theThe present invention comprises the triglyceride oil composition, as set out in detail above, a total quantity of monoglycerides and diglycerides of 20 less than 15.00 wt.-%, preferably less than 10.00 wt.-%, more preferably less than 7.00 wt.-%, and even more preferably less than 5.00 wt.-%, in relation to the total weight of the triglyceride oil composition. Method ISO 18395:2005 is a suitable method for the quantitative determination of each of the glyceride types.25 In certain forms of the composition(C) of the present invention, the triglyceride oil composition, as set out in detail above, comprises a total quantity of free fatty acids of less than 5.00 wt.-%, preferably less than 3.00 wt.-%, with greater preference less than 2.00 wt.-%, with even greater preference less than 1.50 wt.-%, in relation to the total weight of the triglyceride oil composition. Method ISO 2025 / 5130 BE2025 / 5130 16 18395:2005 is a suitable method for the quantitative determination of each of the glyceride types.In certain forms of composition(C) of the present invention, the triglyceride oil composition, as set out in detail above, comprises a total quantity of triglycerides of more than 80.005 wt.-%, preferably more than 87.00 wt.-%, preferably more than 91.00 wt.-%, preferably more than 93.50 wt.-%, in proportion to the total weight of the triglyceride oil composition. Method ISO 18395:2005 is a suitable method for the quantitative determination of each of the glyceride types.10 As already stated, according to the present invention, the triglyceride oil composition, as set out in detail above as part of the composition(C), comprises, preferably essentially consists of, in proportion to the total weight of the triglyceride oil composition, 40.00 to 100.00 wt.of at least one second drying oil chosen from the group consisting of linseed oil, sunflower oil, safflower oil, soybean oil, poppy seed oil, perilla oil, hemp seed oil, cottonseed oil, sesame oil, corn oil, flaxseed oil, 20 grapeseed oil, walnut oil, chia oil, and camelina oil. In the context of the present invention, the term “drying oil” is deemed to refer to unsaturated fatty acid oils which are liquid oils at 20°C and which oxidatively crosslink and harden / solidify by reaction with atmospheric oxygen. 25 In the context of the present invention, the expression “at least one first drying oil” is understood to mean one or more than one first drying oil. Mixtures of first drying oils, as set out in detail above, may also be used for the invention. In the rest of the text, the expression “at least one first 30 drying oil”, for the purposes of the present invention, is understood to mean both in the singular and in the plural, in other words, the triglyceride- 2025 / 5130 BE2025 / 5130 17oil composition, and thus also the composition(C)of the present invention comprising the said triglyceride oil composition, as set out in detail above, may comprise one or more than one first drying oil as set out in detail above. For the purposes of the composition(C) of the present invention, as set out in detail above, it is assumed that the at least one first-drying oil, as set out in detail above, comprises a substantial quantity of at least one fatty acid residue with at least three conjugated double bonds (where the three conjugated double bonds have the simplified formula -C=CC=CC=C-), such as a conjugated trienoin fatty acid residue, also known in the field, see for example the introductory part of TakujiTanakaetal.Int.J.Mol.Sci.2011, 12,7495–7509, by the synonymous name conjugated trienoin fatty acid residue. In the context of the present invention, the term “conjugated” in connection with polyunsaturation is known among experts in theorganic chemistry. The term refers to the presence of two or more carbon-carbon double bonds (i.e., C=C bonds) that are covalently linked to each other via a single carbon-carbon bond. In other words, both carbon atoms of a single carbon-carbon double bond are covalently bonded to an additional carbon atom via a double bond. A conjugate system, in its simplest form, can be represented as C=CC=C-. For example, it is described, particularly in various (review) publications in the professional literature, that ung oil, as the at least first-drying oil, in proportion to the total weight of all fatty acid residues in ung oil, can comprise more than 60 wt.-% of the fatty acid residue of α-eleostearic acid ((9Z,11E,13E)-octadeca-9,11,13-trienoic acid), as well as 65 to 85 wt.-% of the fatty acid residue of α-eleostearic acid. Similarly, oil from the seed of bitter gourd, as the at least first-drying oil, in proportion to the total weight of all fatty acid residues in oil from the seed of bitter gourd, and alongsidethe presence of a small amount of the fatty acid residue of β- 2025 / 5130 BE2025 / 5130 18 eleostearic acid ((9E,11E,13E)-octadeca-9,11,13-trienoic acid), comprising 50 to 60 wt.-% of the fatty acid residue of α-eleostearic acid ((9Z,11E,13E)-octadeca-9,11,13-trienoic acid). Furthermore, calendula seed oil can be at least the first drying oil, in proportion to the total weight of all fatty acid residues in calendula seed oil, and in addition to the presence of a small amount of the fatty acid residue of β-calendula acid ((8E,10E,12E)-octadeca- 8,10,12-trienoic acid), comprising up to 65 wt.-% of the fatty acid residue of α-calendic acid ((8E,10E,12Z)-octadeca-8,10,12-trienoic acid), such as 50 to 65 wt.-% of the fatty acid residue of α-calendic acid. Pomegranate seed oil as the at least one first-drying oil can, in proportion to the total weight of 10 all fatty acid residues in pomegranate seed oil, comprise 50 to 85 wt.-% of the fatty acid residue of punic acid ((9Z,11E,13Z)-octadeca-9,11,13-trienoic acid), such as approximately 65 wt.-% of the fatty acid residue of punic acid. Oiticica seed oilas the at least one-first drying oil may, in proportion to the total weight of all fatty acid residues in initicica seed oil, comprise 45 to 85 wt.-% of the fatty acid residue of α-licanoic acid (4-oxo-(9Z,11E,13E)-octadeca-9,11,13-trienoic acid or 4-oxo-α-eleostearic acid). Preferably, the at least one-first drying oil as part of the composition(C) of the present invention, as set out in detail above, is chosen from the group consisting of tung oil, calendula seed oil, pomegranate seed oil, and iniotica oil. With greater preference, the at least one-first drying oil is chosen from tung oil or calendula seed oil. With the greatest preference, the at least one-first drying oil is tung oil. In the context of the present invention, the expression “at least one second drying oil” is understood to mean one or more than one second drying oil. Mixtures of second drying oils, as explained in detail above, may also be used for the invention. In the rest of the text, the expression “at least one seconddrying oil”, for the purposes of the present invention, understood both in the singular and in the plural, in other words, the triglyceride-30 oil composition, and thus also the composition(C)of the present invention comprising the said triglyceride-oil composition, as set out in detail above 2025 / 5130 BE2025 / 5130 19, may furthermore comprise one or more than one second drying oil as set out in detail above. For the purposes of the composition(C)of the present invention, as set out in detail above, it is assumed that the at least one second drying oil, as set out in detail above, comprises a substantial quantity of at least one fatty acid residue with at least two unconjugated double bonds, where the at least two unconjugated double bonds are separated by a methylene-CH2- group (where the two unconjugated double bonds separated by a methylene-CH2 group have the simplified formula C=C-CH2-C=C-10), such as a fatty acid residue with an unconjugated unit that is chosenis composed of 1,4-pentadiene or 1,4,7-octatriene. For example, it is described, particularly in various (review) publications in the scientific literature, that linseed oil, as the at least second-drying oil, can comprise, in proportion to the total weight of all fatty acid residues in linseed oil, 1315 to 19 wt.-% of the fatty acid residue of linoleic acid ((9Z,12Z)-octadeca-9,12-dienic acid) and 48 to 60 wt.-% of the fatty acid residue of α-linolenic acid ((9Z,12Z,15Z)-octadeca-9,12,15-trienic acid). Safflower oil, as the at least second-drying oil, can comprise, in proportion to the total weight of all fatty acid residues in safflower oil, 55 to 77 wt.-% of the 20 fatty acid residue of linoleic acid ((9Z,12Z)-octadeca-9,12-dienic acid) and approximately 0.1 wt.-% of the fatty acid residue of α-linolenic acid ((9Z,12Z,15Z)-octadeca-9,12,15-trienoic acid). Soybean oil, as the second drying oil, can, in proportion to the total weight of all fatty acid residues in soybean oil, comprise 40 to 55 wt.-% of the fatty acid residue of linoleic acid ((9Z,12Z)-octadeca-9,12-25-dienic acid) and 5 to 10 wt.-% of the fatty acid residue of α-linolenic acid.((9Z,12Z,15Z)-octadeca-9,12,15-trienoic acid). Preferably, the at least second-drying oil that may form part of the composition(C) of the present invention, as set out in detail above, is chosen from the group consisting of linseed oil, sunflower oil, safflower oil, soybean oil, and walnut oil. With the highest preference, the at least second-drying oil is linseed oil. 2025 / 5130 BE2025 / 5130 20 The inventors have surprisingly found that, if present, when in the high-solids composition(C) of the present invention, as set out in detail above, use is made of the triglyceride oil composition, as set out in detail above, where the triglyceride oil composition furthermore comprises a certain5 quantity of at least one second drying oil, as set out in detail above, where the said second drying oil comprises a certain quantity of at least one fatty acid residue with at least two non-conjugated double bonds, where the at least two non-conjugated double bonds separated by a methylene-CH2-10 group, the specified quantity of the least stone-first drying oil, in particular the specified quantity of the least stone-fatty acid residue containing at least three conjugated double bonds, now exhibits a synergistic interaction with the specified quantity of the least stone-second drying oil, in particular the specified quantity of the least stone-fatty acid residue containing at least two non-conjugated double bonds separated by an emethylene-CH2 group present therein, which leads to an environmentally friendly and easy-to-apply high-solids composition(C) that is hardenable or curable by photo-assisted oxypolymerization, and which exhibits improved film-forming properties, i.e. a shortened film-forming time also faster film formation, and at the same time at least a rapid build-up of hardness and good mechanical properties in terms of hardness remainsexhibit after the said composition(C) is applied to wood products, which leads to the formation of layers of the said composition(C) applied as a coating on the said wood products, and which does not require the combined use of one or more isocyanate-based accelerators, as demonstrated in the experimental section. With the advantage of having such improved properties in terms of film formation resulting from the synergistic interaction or cooperation between at least the first drying oil and at least the second drying oil, the additional advantage that the composition(C), in particular the resulting layer of the said composition(C) applied as a coating after application to wood products, shows a reduced chance of being quickly contaminated by dirt, dust, insects and the like, which can become trapped in the coating applied layer while the said coating applied layer has (not) solidified and is still liquid.5 According to a preferred form of execution of the composition(C) of thefor the present invention it holds that the triglyceride oil composition, as set out in detail above, comprises, preferably essentially consists of, in proportion to the total weight of the triglyceride oil composition: 40.00 to 100.00 wt.-% of the at least first drying oil selected from the group consisting of tung oil, calendula seed oil, pomegranate seed oil, enoiticica oil, preferably 50.00 to 100.00 wt.-%, with greater preference 65.00 to 100.00 wt.-%, with even greater preference 75.00 to 95.00 wt.-%, with even greater preference 80.00 to 90.00 wt.-%; and 15 60.00 to 0.00 wt.-% of the at least 0.2 drying oil selected from the group consisting of linseed oil, sunflower oil, safflower oil, soybean oil, poppy seed oil, perilla oil, hemp seed oil, cottonseed oil, sesame oil, corn oil, flaxseed oil, grapeseed oil, walnut oil, chia oil, and camelina oil, preferably 50.00 to 0.00 wt.-%, more preferably 35.00 to 0.00 wt.-%, even more preferably 25.00 to 5.00 wt.-%, even more preferably 20.00 to 10.00 wt.-%.According to a more preferred form of the composition(C) of the present invention, the triglyceride-25 oil composition, as set out in detail above, comprises, preferably in essence, in proportion to the total weight of the triglyceride oil composition: 40.00 to 100.00 wt.-% of the at least first drying oil selected from the group consisting of tung oil, calendula seed oil, pomegranate seed oil, enoiticica oil, preferably 50.00 to 100.00 wt.-%, preferably 65.00 to 100.00 wt.-%, preferably 75.00 to 95.00 wt.-%, and even more preferably 80.00 to 90.00 wt.%; and 60.00 to 0.00 wt.% of the least and second drying oil chosen from the group consisting of linseed oil, sunflower oil, safflower oil, soybean oil, and walnut oil, preferably 50.00 to 0.005 wt.%, with greater preference 35.00 to 0.00 wt.%, with even greater preference 25.00 to 5.00 wt.%, with even greater preference 20.00 to 10.00 wt.%.According to a form of execution that is even more preferred of the composition(C) of the present invention, the triglyceride-10 oil composition, as set out in detail above, comprises, preferably in essence, in proportion to the total weight of the triglyceride oil composition: 40.00 to 100.00 wt.-% of the at least and first drying oil selected from tung oil or calendula seed oil, preferably 50.00 to 15 and 100.00 wt.-%, preferably 65.00 to 100.00 wt.-%, preferably 75.00 to 95.00 wt.-%, preferably 80.00 to 90.00 wt.-%; and 60.00 to 0.00 wt.-% of the at least 1 / 2 drying oil selected from the group consisting of linseed oil, sunflower oil, safflower oil, soybean oil, and walnut oil, preferably 50.00 to 0.00 wt.-%, more preferably 35.00 to 0.00 wt.-%, even more preferably 25.00 to 5.00 wt.-%, and even more preferably 20.00 to 10.00 wt.-%. According to a form that is even more preferred of the 25composition(C)ofthepresent invention, the triglyceride oil composition, as set out in detail above, comprises, preferably in essence, in proportion to the total weight of the triglyceride oil composition: 40.00 to 100.00 wt.-% of tung oil as the at least first 30 drying oil, preferably 50.00 to 100.00 wt.-%, with greater preference 65.00 to 100.00 wt.-%, with even greater preference 75.00 2025 / 5130 BE2025 / 5130 23 to 95.00 wt.-%, with even greater preference 80.00 to 90.00 wt.-%; and 60.00 to 0.00 wt.-% of linseed oil as the at least second drying oil, preferably 50.00 to 0.00 wt.-%, with greater preference 35.00 to 0.00 wt.-%, with even greater preference 25.00 to 5.00 wt.-%, with even greater preference 20.00 to 10.00 wt.-%. Furthermore, it is assumed that all definitions and preferences as described above for the triglyceride oil composition apply equally well to these forms and all other forms described below.As stated above, according to the present invention, the quantity of the triglyceride oil compound, as set out in detail above, as part of the compound(C) shall be in the range of 60.00 to 99.00 wt.-%, in relation to the total weight of the compound(C).15 By advantage, the quantity of the triglyceride oil compound, as set out in detail above, as part of the compound(C), in relation to the total weight of the compound(C), shall be equal to or greater than 65.00 wt.-%, preferably equal to or greater than 70.00 wt.-%, with more preferably equal to or greater than 75.00 wt.-%, with even more preferably equal to or greater than 78.00 wt.-%. In a preferred form of the composition(C) of the present invention, the triglyceride oil composition, as set out in detail above, in proportion to the total weight of the composition(C), shall be present in a quantity of 65.00 to 99.00 wt.-%, preferably in a quantity of 70.00 to 99.00 wt.-%, more preferably in aquantity of 75.00 to 99.00 wt.-%, with even greater preference in a quantity of 78.00 to 99.00 wt.-%. As stated above, according to the present invention, the composition(C), in proportion to the total weight of the composition(C), comprises 30 0.01 to 2.00 wt.-% of at least one metal-based desiccant. 2025 / 5130 BE2025 / 5130 24 In the context of the present invention, the expression “at least one metal-based desiccant” means one or more than one metal-based desiccant. Mixtures of metal-based desiccants may also be used for the invention. In the rest of the text the expression “at least one metal-based desiccant” is understood for the purposes of the present invention, both in the singular and in the plural, in other words, the compound (C) of the present invention may comprise one or more than one metal-based desiccant. In the context of the present invention the expression “0.0110 to 2.00 wt.-% of at least one metal-based desiccant” orto the quantity of metal-based desiccant when composition(C) contains only one metal-based desiccant, or to the sum of the quantities of metal-based desiccant when composition(C) contains more than one metal-based desiccant. This means that it follows15 that, when more than one metal-based desiccant is present, it must be the sum of the quantities of each of the said metal-based desiccant in the range of 0.01 to 2.00 wt.-%, in relation to the total weight of composition(C). Suitable metal-based desiccants, or metal-based desiccant catalysts, for the purposes of composition(C) of the present invention, as set out in detail above, are known to skilled workers. It is assumed that it is a common and well-known practice in the field of wood coating compositions, and thus of the composition(C) of the inventions in question as set out in detail above, or drying compositions in general, of one or more metal-based drying agentsto add which help to achieve accelerated (i.e. faster) oxidative drying after the application of the said wood coating compositions on wood products, which leads to the formation of layers of the said wood coating compositions applied as coatings on the said wood products. Furthermore, it is assumed that the drying capacity of wood coating compositions occurs mainly through oxidation in the air, i.e. auto-oxidative drying, and the associated reaction mechanisms, whereby the said reaction mechanisms, which take place in particular via the formation and breakdown of hydroperoxide intermediates, are described in various publications in the literature. In general, metal-based drying agents can thus help to catalyze / achieve accelerated oxidative drying of the wood coating compositions, particularly since the said metal-based drying agents can catalyze / accelerate the formations and / or reduction of the formed hydroperoxide intermediates in order toto establish faster one or more crosslinks between unsaturated parts10 or units in the wood coating compositions and oxygen (atmospheric O2 in the air) after the application of the said wood coating compositions on wood products, which leads to the formation of layers of the said wood coating compositions applied as coatings on the said wood products. According to a preferred form of composition(C) of the present invention, the metal-based desiccant, as set out in detail above, is a metal-based salt where the metal cation component is chosen from the group consisting of manganese (Mn), iron (Fe), cobalt (Co), zirconium (Zr), and calcium (Ca); where the anion component is chosen from the group consisting of halides, nitrates, sulfates, acetonates, and carboxylates such as naphthenates, linoleates, octates, ethylhexanoates such as 2-ethylhexanoate, decanoates, neodecanoates, and dodecanoates; and where the metal-based salt may be in a complex with at least one nitrogen donor ligand chosen from the group thatconsists of single-toothed, two-toothed, three-toothed, four-toothed, five-toothed, and 25 six-toothed nitrogen donor ligands. Suitable nitrogen donor ligands are known in the field, including, for example, 1,10-phenanthroline and 2,2'-bipyridine. A non-restrictive example of a suitable metal-based salt if it is at least a metal-based desiccant, where the metal-based salt is furthermore in a complex30 with a nitrogen donor ligand, is iron(1+), chlor[rel-1,5-dimethyl(1R,2S,4R,5S)- 9,9-dihydroxy-3-methyl-2,4-di(2-pyridinyl-kN)-7-[(2-pyridinyl-kN)methyl]-3,7- 2025 / 5130 BE2025 / 5130 26 diazabicyclo[3,3,1]nonane-1,5-dicarboxylate-kN3,kN7]-,chloride(1-),(OC-6-63)- [CAS registration number 478945-46-9], commercially available as Borchi® OXY-Coat 1410 from Borchers (Milliken). An additional non-restrictive example of a suitable metal-based salt if it is at least a metal-based desiccant, where the metal-based salt is furthermore in a complex 5 with nitrogen donor ligand, is an anodecanoate in the presence of 2-[[2-(dimethylamino)ethyl]methylamino]ethanol as the nitrogen donor ligand, commercially available as DICNATEMV130A from DICCorporation. According to a more preferred form of the composition(C) of the present invention, the at least one metal-based drying agent, as set out in detail above, is a metal-based salt where the metal cation component is chosen from the group consisting of manganese (Mn), iron (Fe), and cobalt (Co); where the anion component is chosen from the group consisting of halides, aceto-acetonates, and carboxylates such as naphthenates, linoleates, octates, ethyl hexanoates such as 2-15 ethyl hexanoate, decanoates, neodecanoates, and dodecanoates; and where the metal-based salt may be in a complex with at least one nitrogen donor ligand chosen from the group consisting of monodentate, bidentate, tridentate, quadrent, quindentate, and hexadentate nitrogen donor ligands. Non-restrictive examples of commercially available metal-based desiccants suitable for use in the composition(C) of theThe present invention, as set out in detail above, includes in particular Borchi® OXY-Coat 1410, commercially available from Borchers (Milliken); Borchi® Dragon, commercially available from Borchers (Milliken); DICNATE 25 MV 130 from DICCorporation; and ADDITOL® dry CF 100 and CF 103, commercially available from Allnex. Furthermore, it is assumed that all definitions and preferences as described above for the least stone metal-based desiccant apply equally to these forms and all other forms described below. 2025 / 5130 BE2025 / 5130 27 As stated above, according to the present invention, the composition(C), in proportion to the total weight of the composition(C), comprises 0.01 to 2.00 wt.-% of at least one metal-based desiccant, as set out in detail above. With advantage, the quantity of at least one metal-based desiccant, as set out in detail above, as part of the composition(C), in proportion to the total weight of the composition(C), is equal to orgreater than 0.02 wt.-%, preferably equal to or greater than 0.03 wt.-%, with more preferably equal to or greater than 0.04 wt.-%, with even more preferably equal to or greater than 0.05 wt.-%.10 Furthermore, it is assumed that the upper limit of the quantity of the at least one metal-based drying agent, as set out in detail above, as part of the composition(C), in relation to the total weight of the composition(C), is equal to or less than 1.80 wt.-%, preferably equal to or less than 1.70 wt.-%, with more preferably equal to or 15 less than 1.60 wt.-%, with even more preferably equal to or less than 1.50 wt.-%. In a preferred form of the composition(C) of the present invention, the least drying metal-based oil, as set out in detail above, in proportion to the total weight of the composition(C), shall be present in a quantity of 0.02 to 1.80 wt.-%, preferably in a quantity of 0.03 to 1.70 wt.-%, more preferably in a quantity of 0.04 to 1.60 wt.-%, more preferably in a quantity of 0.05 to 1.50 wt.-%.As stated above, according to the present invention, the composition(C), in proportion to the total weight of the composition(C), comprises 0.50 to 10.00 wt.-% of at least one acylphosphine oxide photoinitiator [hereinafter compound(P1)] chosen from bis(4-methylphenyl)(2,4,6-trimethylbenzoyl)phosphine oxide;offenylbis(2,4,6-trimethylbenzoyl)phosphine oxide. In the context of the present invention, the expression “at least one acylphosphine oxide photoinitiator” is understood to mean one or more than one acylphosphine oxide photoinitiator. Mixtures of acylphosphine oxide photoinitiators may also be used for the invention. In the rest of the text the expression “at least one acylphosphine oxide photoinitiator” is understood for the purposes of the present invention, both in the singular and in the plural, in other words, the compound5 (C) of the present invention may comprise one or more than one acylphosphine oxide photoinitiator. In the context of the present invention the expression “0,50up to and including 10.00 wt.-% of at least one acylphosphine oxide photoinitiator” or according to the amount of acylphosphine oxide photoinitiator when composition(C)10 contains only one acylphosphine oxide photoinitiator, or according to the sum of the amounts of acylphosphine oxide photoinitiator when composition(C) contains more than one acylphosphine oxide photoinitiator. This means that it follows that, when more than one acylphosphine oxide photoinitiator is present, it must be the sum of the amounts of each of the said acylphosphine oxide-15 photoinitiators that lies in the range of 0.50 to 10.00 wt.-%, in proportion to the total weight of the composition(C). In the context of the present invention, the term is used “acylphosphine-oxide-photoinitiator” a non-polymerizable and non-polymeric photoinitiating compound intended to comprise at least one acyl functionality (RC(=O)-)20 which is directly coupled via a C-P bond to a phosphine-oxide functionality (-P(=O)-). Upon exposure to light of a specificat wavelength this compound undergoes a photochemical reaction in which Norrish Type I cleavage takes place, which leads to the homolytic dissociation of the C-P bond. This cleavage leads to the formation of at least one acyl radical and a phosphinoyl radical. These radicals can initiate and / or accelerate the autooxidative drying process of the composition(C) of the present invention, and as set out in detail above, upon exposure to molecular oxygen, in particular the autooxidative drying process of the triglyceride oil composition in the presence of at least one metal-based drying agent as part of the composition(C), and after the application of the composition(C) to wood products, which leads to the formation of layers of the said composition(C) applied as a coating 2025 / 5130 BE2025 / 5130 29 on the said wood products. Specifically, these radicals can promote the formation of lipid peroxyl radicals and / or the formation of lipid hydroperoxide intermediates during the auto-oxidative drying process of the composition(C). This photo-assisted 5Consequently, the oxypolymerisation process can contribute to and lead to an accelerated auto-oxidation-drying of the composition(C). Acylphosphine oxide photoinitiator compounds(P1) can be chemically synthesized for the purposes of the composition(C) of the present invention in accordance with the generally accepted knowledge10 of skilled workers. The said synthesis of acylphosphine oxide photoinitiator compounds(P1) can be carried out using conventional methods known to skilled workers. Acylphosphine oxide photoinitiator compounds(P1) for the purposes of the composition(C) of the present invention may be commercially available15. As stated above, according to the present invention, the composition(C), in proportion to the total weight of the composition(C), comprises 0.50 to 10.00 wt.-% of at least one acylphosphine oxide photoinitiator [hereinafter compound(P1)], as set out in detail above.20 With advantage is the quantity of the at least one compound(P1),as set out in detail above, as part of the compound(C), in proportion to the total weight of the compound(C), equal to or greater than 0.60 wt.-%, preferably equal to or greater than 0.70 wt.-%, more preferably equal to or greater than 0.80 wt.-%, even more preferably equal to or greater than 25 or greater than 0.90 wt.-%. Furthermore, it is assumed that the upper limit of the quantity of at least one compound(P1), as set out in detail above, as part of the compound(C), in proportion to the total weight of the compound(C), is equal to or less than 8.00 wt.-%, preferably equal to or less than 6.00 wt.-%, more preferably equal to or less than 4.00 wt.-%, even more preferably equal to or less than 3.00 wt.-%. 2025 / 5130 BE2025 / 5130 30 In a preferred form of the composition(C) of the present invention, the at least one compound(P1), as set out in detail above, in proportion to the total weight of the composition(C), present in a quantity of 0.60 to 8.00 wt.-%, preferably inan amount of 0.70 to 6.00 wt.-%, with greater preference in an amount of 0.80 to 4.00 wt.-%, with even greater preference in an amount of 0.90 to 3.00 wt.-%. As stated above, according to the present invention, the composition (C)α-hydroxyalkylphenone photoinitiator [hereinafter compound (P2)] comprises, according to Formula (IP2), as set out in detail below, where the compound (P2) is present in an amount, determined by a weight ratio of compound (P2) to compound (P1), as set out in detail above, in the range of 0.5 to 10.0; 15 Formula(IP2) The inventors have surprisingly found that when the high-solids composition(C) of the present invention, as set out in detail above, uses a certain amount of the α-hydroxyalkylphenone photoinitiator compound(P2) according to 20 Formula(IP2), as set out in detail above, in combination with a certain amount of at least one acylphosphine oxide photoinitiatorinitiator compound(P1), as set out in detail above, a certain quantity of at least one metal-based drying agent, as set out in detail above, and a certain quantity of a triglyceride-25 oil compound, as set out in detail above, where the triglyceride-oil compound comprises a certain quantity of at least one first drying oil, as set out in detail above, and possibly a certain quantity of at least one second drying oil, as set out in detail above 2025 / 5130 BE2025 / 5130 31, the certain quantity of α-hydroxyalkylphenone-photo-initiator compound(P2) according to Formula(IP2) now exhibits a synergistic interaction with the certain quantity of the at least one acylphosphine oxide photoinitiator compound(P1), which leads to an environmentally friendly and easy-to-apply compound(C) with high solids content which is hardenable or curable by transparent light via photo-assisted oxypolymerisation and which exhibits a rapid build-up of hardness, andat the same time continue to exhibit at least good properties in terms of film formation, i.e. without the film formation being compromised or hindered, as well as good mechanical properties in terms of hardness10 after the said composition(C) has been applied to wood products, which leads to the formation of coating layers of the said composition(C) on the said wood products, and which does not require the combined use of one or more isocyanate-based accelerators, as shown in the experimental part. In particular15 inventors have surprisingly found that the photo-assisted oxypolymerization of the high-solids composition(C) of the present invention can now be synergistically accelerated thanks to synergistic interaction between the specified quantities of the two types of photo-initiators, i.e. on the one hand the at least acetylphosphine oxide-20 photo-initiator compound(P1) and on the other hand the α-hydroxyalkylphenone photo-initiator compound(P2) according to Formula(IP2), which leads to a synergisticimproved hardness build-up after the said composition(C) has been applied to wood products, which leads to the formation of coating layers of the said composition(C) applied to the said 25 wood products, and that without the use of one or more isocyanate-based accelerators, as shown in the experimental part. For the purposes of the composition(C) of the present invention, as set out in detail above, it is assumed that the α-hydroxyalkylphenone photoinitiator [hereinafter compound(P2)] according to Formula (IP2)30 is also known in the field by the synonymous names 2-hydroxy-2-methylpropiophenone, or 2-hydroxy-2-methyl-1-phenylpropan-1-one. 2025 / 5130 BE2025 / 5130 32 The compound (P2) according to Formula (IP2) can be chemically synthesized for the purposes of the composition (C) of the present invention in accordance with the generally accepted knowledge of skilled workers. The said synthesis of compound (P2) according to Formula (IP2) can be carried out using conventional methods known to skilled workers5.The compound (P2) according to Formula (IP2) for the purposes of the composition (C) of the present invention is commercially available, such as at ABCR. As stated above, the compound (P2), as set out in detail above10, is present in a quantity, determined by a weight ratio of compound (P2) to compound (P1), as set out in detail above, in the range of 0.5 to 10.0. Preferably, the weight ratio of compound (P2) to compound (P1) is equal to or greater than 0.6, preferably equal to or greater than 0.7, preferably equal to or greater than 0.8, preferably equal to or greater than 0.9. Furthermore, it is assumed that the upper limit of the weight ratio of compound(P2) to compound(P1) is equal to or less than 9.0, preferably equal to or less than 8.0, more preferably equal to or less than 7.0, and even more preferably equal to or less than 6.0. In a preferred form of the composition(C) of the present invention lies the weight ratio of compound(P2) toconnection(P1)intherangefrom0.6to9.0,preferablyfrom0.7to8.0,withfurtherpreferencefrom0.8to7.0,withfurtherpreferencefrom250.9to6.0. As stated above, according to the present invention, the composition(C), in relation to the total weight of the composition(C), comprises equal to or less than 5.00 wt.-% of at least one radically polymerizable (meth)acryl-functionalized compound.30 In the context of the present invention, the expression “equal to or less than 5.00 wt.-% of at least one radically polymerizable 2025 / 5130 BE2025 / 5130 33 (meth)acryl-functionalized compound” refers either to the quantity of such radically polymerizable (meth)acryl-functionalized compound when the composition(C) comprises only one of the said radically polymerizable (meth)acryl-functionalized compound, or to the sum of the quantities of such radically polymerizable5 (meth)acryl-functionalized compounds when the composition(C)comprises more than one of the mentioned radically polymerizable (meth)acrylic functionalized compounds. This means that it follows that, when more than one of the mentioned radically polymerizable (meth)acrylic functionalized compounds is present, it must be the sum of the 10 quantities of each of the mentioned radically polymerizable (meth)acrylic functionalized compounds that is equal to or less than 5.00 wt.-%, in relation to the total weight of the composition(C). In the context of the present invention, the term “at least one radical polymerizable (meth)acrylic functionalized15 compound” refers to compounds with at least one radical polymerizable (meth)acrylic acid as a functional group or at least one radical polymerizable (meth)acrylate as a functional group such as a salt, a conjugate base, or an ester of the said at least radically polymerizable (meth)acrylic acid as a functional group; which, under the influence of irradiation, a (photo)initiator, and / or a metal-based drying agentcan undergo radical polymerization, including in particular radical copolymerization with the triglyceride oil composition, as detailed above, during the auto-oxidative drying process into the cured polymer matrix after application of the composition(C) to wood products,25 which leads to the formation of coating layers of the said composition(C) on the said wood products. The inventors therefore limit the total combined quantity of additional radical polymerizable (meth)acryl-functionalized compounds in the composition(C), as set out in detail above, to 30 small quantities, as set out in detail above, i) on the one hand to ensure that those compounds do not interfere with the auto- 2025 / 5130 BE2025 / 5130 34 oxidative drying process to the cured polymer matrix or alter the final properties of the composition(C) after application of the composition(C) to wood products, which leads to the formation of coating layers of the said composition(C) on the saidwood products, and ii) on the other hand to distance oneself further from known water-based wood coating compositions with ultraviolet (UV) curable, which are typically aqueous emulsions or aqueous dispersions of acrylate polymers and polyurethane-acrylate hybrids with radically polymerizable (meth)acrylic functionalities, such as radically polymerizable (meth)acrylate functionalities, which can lead to undesirable fiber swelling10 (water thickening or fiber thickening) due to the presence of significant amounts of water in similar wood coating compositions, as described above, and which generally usually require exposure to UV irradiation for curing and crosslinking, making effective manual application difficult when applied to wood products to coat wood surfaces. Non-restrictive examples of such radically polymerizable (meth)acrylic-functionalized compounds, as detailed above, include in particular (meth)acrylate-functionalizedmonomers, and (meth)acrylate-functionalized (co)polymers such as 20 polyether (meth)acrylates, urethane (meth)acrylates, epoxy (meth)acrylates, polyester (meth)acrylates, amino (meth)acrylates, melamine (meth)acrylates, silicone (meth)acrylates, phosphazene (meth)acrylates, and (meth)acrylic (meth)acrylates or mixtures thereof. With advantage, the quantity of the at least one radically polymerizable (meth)acrylic functionalized compound, as set out in detail above, is equal to or less than 4.00 wt.-%, preferably equal to or less than 3.00 wt.-%, with greater preference equal to or less than 2.00 wt.-%, with even greater preference equal to or less than 1.00 wt.-%, in relation to the total weight of the composition(C).30 2025 / 5130 BE2025 / 5130 35 Preferably, the composition(C), as set out in detail above, is virtually free of one or more radically polymerizable (meth)acrylic functionalized compounds, as set out in detail above. For the purposes of the present invention, the expression means“virtually free of one or more radical polymerizable (meth)acryl-5 functionalized compounds” that the quantity of at least one radical polymerizable (meth)acryl-functionalized compound, in relation to the total weight of the composition(C), is equal to or less than 1.00 wt.-%, preferably equal to or less than 0.50 wt.-%, with more preferably equal to or less than 0.10 wt.-%.10 As stated above, according to the present invention, the composition(C), as set out in detail above, has a total solids content equal to or greater than 90.00 wt.-% in relation to the total weight of the composition(C), where the total solids content of the composition(C) is measured in accordance with standard15 ASTMD2369–20. In other words, the composition(C) is virtually free of volatile compounds, as measured according to the standard ASTMD2369–20. In the context of the present invention, the standard ASTMD2369–20 is used to obtain a weight percentage of solidssubstances (non-volatile substances) to determine the different volatile substances emitted by coatings. Typically, a material sample is placed on a balance scale, such as an aluminium foil balance scale, and placed in a convection oven at 110°C ± 5°C for 60 minutes. The weight remaining on the balance scale, i.e., the weight of the remaining solids, is then determined, and the total solids content is subsequently calculated based on the weight of the remaining solids. The lost mass represents the total weight percentage of volatile components. By advantage, the composition(C) according to the present invention, as set out in detail above, has a total solid content equal to or greater than 92.50 wt.-%, preferably equal to or greater than 95.00 wt.-%, preferably equal to or greater than 97.00 wt.-%, preferably equal to or greater than 99.00 wt.-%, where all wt.-% are in proportion to the total weight of the composition(C),and where the total solid content of the composition(C) has been measured according to the standard ASTMD2369–20.5 The inventors have surprisingly found that the composition(C), as set out in detail above, can rightly be characterized as a composition(C) with a high solid content that is virtually free of volatile components, such as water and volatile organic compounds (VOCs), in particular volatile organic compounds (VOCs), thereby avoiding unwanted fiber swelling (water thickening or fiber thickening) when applied to wood surfaces due to the presence of significant amounts of water as described above, while still obtaining a composition(C) that is hardenable or curable15 is transparent light via photo-assisted oxypolymerization and exhibits a rapid build-up of hardness and at the same time continues to exhibit at least good properties in terms of film formation, i.e. without the film formation inthe compression or is hindered, as well as good mechanical properties in terms of hardness after the said composition(C)20 has been applied to wood products, which leads to the formation of coating layers of the said composition(C) on the said wood products, as shown in the experimental part, and which does not require the combined use of one or more isocyanate-based accelerators, as shown in the experimental part.25 Furthermore, it is assumed that all definitions and preferences, as described above, apply equally to all other forms of execution described hereinafter. According to certain forms of execution of the present invention, the composition(C), as set out in detail above, may furthermore comprise at least one 30 micronized wax [hereinafter micronized wax(Mp)] with a 2025 / 5130 BE2025 / 5130 37 particle size D90 equal to or smaller than 36µm and a particle size D50 equal to or smaller than 20µm. Micronized waxes(Mp) are known in the trade. Non-limitingExamples of suitable micronized waxes(Mp) for use in the composition(C), as detailed above, include in particular5 micronized polytetrafluoroethylene wax; micronized hybrid wax of polyethylene-polytetrafluoroethylene wax; micronized Fischer-Tropsch wax; micronized polyethylene wax, such as non-polar polyethylene waxes and micronized oxidized high-density polyethylene wax; micronized polypropylene wax, such as micronized non-polar10 polypropylene wax; micronized polyamide wax, such as micronized ethylene-bis-stearamide wax, micronized erucamide wax, micronized stearamide wax, and micronized amide wax made from sugarcane; micronized carnauba wax; micronized wax made from starch, such as micronized wax made from corn starch; and 15 micronized polymer hybrids thereof, such as micronized hybrid wax of Fischer-Tropsch wax, polytetrafluoroethylene wax and silica, micronizedhybrid wax of Fischer-Tropsch waxes and polyethylene wax, micronized hybrid wax of polyethylene waxes and amide wax, micronized hybrid wax of Fischer-Tropsch waxes and amide wax, micronized hybrid wax of 20 polyethylene wax, polypropylene wax, Fischer-Tropsch waxes and amide wax. In the context of the present invention, the expression “at least one micronized wax” is understood to mean one or more than one micronized wax. Mixtures of micronized waxes may also be used for the invention. In the rest of the text, the expression 25 “micronized wax”, for the purposes of the present invention, is understood to mean both in the singular and in the plural. The micronized wax (Mp) is commercially available. The micronized wax (Mp) can be prepared according to preparation methods known in the field. The said preparation of the micronized wax (Mp)30 can be carried out using conventional methods known among professionals, such as melt dispersion techniques, spray techniques such as 2025 / 5130 BE2025 / 5130 38spray cooling, milling techniques such as air jet milling, deposition techniques, grinding techniques, or granular polymerization. The use and presence of micronized waxes (Mp) has a decisive influence on the resulting composition (C) according to the present invention for obtaining good properties regarding wear resistance, scratch resistance, anti-lock action, water repellency and slip resistance when applied to wood products. By advantage, the micronized wax (Mp), as detailed above, has a particle size D90 equal to or smaller than 32.0µm and a particle size D50 equal to or smaller than 18.0µm, preferably 10 a particle size D90 equal to or smaller than 29.0µm and a particle size D50 equal to or smaller than 16.0µm, preferably a particle size D90 equal to or smaller than 25.0µ and a particle size D50 equal to or smaller than 14.0µm, preferably a particle size D90 equal to or smaller than 22.0µ and a 15particle size D50 which is equal to or smaller than 12.0 µm, with greater preference for a particle size D90 which is equal to or smaller than 18.0 µm and a particle size D50 which is equal to or smaller than 10.0 µm. According to one form of composition(C) of the present invention having particles of the micronized wax(Mp),20 as set out in detail above, a particle size according to one of the following particle size distributions: D10≤3.0 µm and D90≤36.0 µm and D50≤20.0 µm; preferably, D10≤3.0 µm and D90≤32.0 µm and D50≤18.0 µm; withmorepreference,D10≤3.0µandD90≤29.0µandD50≤16.0µm;25 withmorepreference,D10≤3.0µandD90≤25.0µandD50≤14.0µm; with more preference, D10≤3.0µm and D90≤22.0µm and D50≤12.0µm; with more preference, D10≤3.0µm and D90≤18.0µm and D50≤10.0µm. According to the present invention, a particle size of the micronized wax (Mp), as set out in detail above, expressed as 30 Dxx≤Y, denotes a percentage (xx%) by weight of particles of the micronized wax (Mp) with a particle size equal to or less than Y. 2025 / 5130 BE2025 / 5130 39For example, D90≤32.0 µm indicates that 90 wt.-% of the particles of the micronized wax (Mp), as set out in detail above, has a particle size equal to or smaller than 32.0 µm. According to the present invention, the particle size of the particles of the micronized wax (Mp) is measured in accordance with DINISO5 13320:2020. In general, the quantity of micronized wax (Mp), as set out in detail above, when present in the composition(C) of the present invention, amounts to 0.00 to 20.00 wt.-%, or 2.00 to 20.00 wt.-%, or 5.00 to 20.00 wt.-%, or 5.00 to 10 with 15.00 wt.-%, or 10.00 to 15.00 wt.-%, in proportion to the total weight of the composition(C). According to certain forms of the present invention, the composition(C), as set out in detail above, may furthermore comprise at least one pigment to improve the appearance of the composition(C). In the context of the present invention, the expression “at least one pigment” means one or more than one pigment. Mixtures ofpigments can also be used for the invention. In the rest of the text, the expression “pigment”, for the purposes of the present invention, is understood to be understood in both the singular and the plural. The pigments mentioned for the purposes of the composition(C) of the present invention are known to professionals in the field of wood coating compositions. Non-limiting examples of suitable pigments include in particular: inorganic and organic pigments. By way25 of non-limiting examples of suitable inorganic pigments mention can be made of compounds of metals such as iron, zinc, titanium, lead, chromium, copper, cadmium, calcium, zirconium, cobalt, magnesium, aluminium, nickel, and other transition metals. In general, some non-limiting examples of suitable inorganic pigments include iron oxides, including red iron oxides, yellow iron oxides, black mica-like iron oxide, black iron oxides, and brown iron oxides; iron hydroxide; graphite; black soot; 2025 / 5130 BE2025 / 5130 40aluminium oxide; calcium carbonate; calcium phosphate; calcium oxide; calcium hydroxide; bismuth carbonate; bismuth oxide; bismuth hydroxide; copper carbonate; copper oxide; copper hydroxide; silicon oxide; zinc carbonate; zinc phosphate; zinc oxide; zinc sulfide; zinc chromate; barium carbonate; barium hydroxide; barium chromate; strontium carbonate; chromium oxide; titanium dioxide; tin oxide; antimony oxide; or mixtures of two or more thereof. By way of non-limiting examples of suitable organic pigments, mention can be made of mono-azo-(arylide)-pigments such as PY3, PY65, PY73, PY74, PY97 and PY98; disazo-(diarylide)-pigments; disazo-(bishydrazone)-condensation pigments; benzimidazolone pigments; naphthol pigments; iso-indoline pigments; iso-indolinone pigments; quinacridone pigments;perylene pigments;perinone pigments; anthraquinone pigments;diketopyrrolopyrrole pigments; diarylpyrrolopyrole pigments; dioxazine pigments; triacrylcarbonium pigments; phthalocyanine pigments, such as cobalt phthalocyanine, copper phthalocyanine, 15copper polychlorophthalocyanine, copper semi-chlorophthalocyanine, copper monochlorophthalocyanine, metal-free phthalocyanine; thioindigo pigments; quinophthalone pigments; or mixtures of two or more thereof. The at least one pigment, as set out in detail above, is usually added as a paste to a suitable drying oil or a suitable mixture of drying oils by dispersing the said at least one pigment in the said suitable drying oil or the said suitable mixture of drying oils in the presence of suitable wetting and / or dispersing agents. Such pigment pastes containing the at least one pigment are commercially available and known among specialists. Furthermore, it is assumed that when the at least one pigment is added to a suitable drying oil or a suitable mixture of drying oils, the said drying oil or mixture of drying oils must be chosen in such a way that the requirements of the triglyceride oil composition as part of the composition(C), as set out in detail above, are met. 2025 / 5130BE2025 / 5130 41 As regards the quantity of the pigments, it is assumed that professionals will use the said pigments in a suitable quantity in accordance with the generally accepted standard practice known among professionals. In general, the quantity of the minimum pigment,5 as set out in detail above, when present in the composition(C) of the present invention, amounts to 0.00 to 20.00 wt.-%; or 0.00 to 15.00 wt.-% such as 2.00 to 15.00 wt.-% or 3.00 to 15.00 wt.-%; or 0.00 to 10.00 wt.-% such as 5.00 to 10.00 wt.-%, in proportion to the total weight of the composition(C).10 According to certain forms of execution of the present invention, the composition(C), as set out in detail above, may furthermore comprise at least one other additional component [hereinafter component(IC)] in order to the appearance to prevent, improve the storage, transport, handling and / or performance of the composition(C).15 In the context of the present invention, the expression is used“at least one other additional component [hereinafter component (IC)]” shall be understood to mean one or more than one component (IC). Mixtures of components (IC) may also be used for the invention. In the rest of the text, the expression “component (IC)”, for the purposes of the present invention,20 is understood to mean both in the singular and in the plural. The mentioned components (IC) are known to professionals in the field of wood coating compositions. Non-restrictive examples of components (IC) include in particular: rheology modifiers, such as polyurethane and urea-based thickeners that can cause a shear-thinning flow behavior; methyl or ethyl esters of vegetable oils; microcrystalline waxes; inorganic or organic UV absorbers; flame retardants; surfactants; dispersants; wetting agents; defoamers; water-repellent agents; biocides such as pesticides, herbicides, insecticides, 30 weedicides, miticides, fungicides, moldicides, algaecides, acaricides,nematicides, bactericides, rodenticides; plasticizers; sterically hindered 2025 / 5130 BE2025 / 5130 42 amine light stabilizers (hinderedamine light stabilizers, HALS); anti-skinning agents; film-forming agents; fragrances; or mixtures of two or more thereof. Methyl or ethyl esters of vegetable oils are known in the trade, are commercially available, and can be prepared according to the generally accepted knowledge of professionals, for example via a (base-catalyzed) transesterification reaction. Non-limiting examples of suitable methyl or ethyl esters of vegetable oils include in particular methyl or ethyl ester of sunflower oil; methyl or ethyl ester of linseed oil; and methyl or ethyl ester of tung oil. Depending on the nature and origin of the vegetable oil component of such methyl or ethyl esters, and thus also the fatty acid residue profile that corresponds to the said vegetable oil component of such methyl or ethyl esters, those methyl or ethyl esters of vegetable oils can further contribute to one or more of theproperties regarding film formation, hardness, oxidative15 crosslinking and drying capacity of the composition(C), as set out in detail above, and at the same time reduce the viscosity of the composition(C), after the said composition(C) has been applied to wood products, which leads to the formation of coating layers of the said composition(C) applied as a coating on the said wood products.20 As regards the quantity of the constituents(IC), it is assumed that professionals will use the said additional constituents(IC) in a suitable quantity in accordance with the common standard practice known among professionals. In general, the quantity of constituents (IC), as set out in detail above, when present in the compound (C) of the present invention, amounts to 0.00 to 11.00 wt.-%, or 0.10 to 11.00 wt.-%, or 1.00 to 10.00 wt.-%, or 1.00 to 8.00 wt.-%, or 2.00 to 8.00 wt.-%, or 3.00 to 7.00 wt.-%, in proportion to the total weight of the compound (C).30 2025 / 5130 BE2025 / 5130 43Furthermore, it is assumed that all definitions and preferences, as described above, apply equally to all other forms of implementation described below. According to a preferred form of the composition(C) of the present invention, the composition(C), as set out in detail above5, comprises, or essentially consists of, in proportion to the total weight of the composition(C): 60.00 to 99.00% by weight [hereinafter wt.-%] of a triglyceride oil composition, where the triglyceride oil composition comprises, preferably essentially consists of, in proportion to the total weight of the triglyceride oil composition, 50.00 to 100.00 wt.-% of at least one first drying oil chosen from the group consisting of tung oil, calendula seed oil, bitter gourd seed oil, pomegranate seed oil, oiticica oil; and 50.00 to 0.00 wt.-% of at least one second drying oil chosen from the group that15 consists of linseed oil, sunflower oil, safflower oil, soybean oil,poppy seed oil, perilla oil, hemp seed oil, cottonseed oil, sesame oil, corn oil, flaxseed oil, grapeseed oil, walnut oil, chia oil, and camelina oil; 0.01 to 2.00 wt. % of at least one desiccant on a 20% basis, as set out in detail above; 0.50 to 10.00 wt.-% of at least one acylphosphine oxide photoinitiator [hereinafter compound(P1)] chosen from bis(4-methylphenyl)(2,4,6-trimethylbenzoyl)phosphine oxide; offenylbis(2,4,6-trimethylbenzoyl)phosphine oxide; 25 α-hydroxyalkylphenone photoinitiator [hereinafter compound(P2)] according to Formula(IP2), where compound(P2) is present in an amount, determined by a weight ratio of compound(P2) to compound(P1), in the range of 0.5 to 10.0; 2025 / 5130 BE2025 / 5130 44 Formula(IP2) equal to or less than 5.00 wt.-% of at least one radical polymerizable(meth)acrylic-functionalized compound; 5 0.00 to 20.00 wt.-% of at least one micronized wax [hereinafter micronized wax(Mp)] with a particle size D90 equivalentis equal to or smaller than 36µm and a particle size D50 equal to or smaller than 20µm; 0.00 to 20.00 of at least one pigment, as set out in detail above; and 0.00 to 11.00 wt.-% of at least one constituent (IC), as set out in detail above; where the composition (C) has a total solids content equal to or greater than 90.00 wt.-%, in relation to the total weight of the composition (C), and where the total solids content of the composition (C) is measured according to the standard ASTMD2369–20. According to a more preferred form of the composition(C) of the present invention, the composition(C), as set out in detail above, comprises, or essentially consists of, in proportion to the total weight of the composition(C): 65.00 to 99.00% by weight [hereinafter wt.-%] of a triglyceride oil composition, where the triglyceride oil composition comprises, preferably essentially consists of, in proportion to the total weight of thetriglyceride oil composition, 65.00 to 100.00 wt.-% of at least one first-drying oil selected from the group consisting of tung oil, calendula seed oil, bitter gourd seed oil, pomegranate seed oil, and oiticica oil; and 35.00 to 0.00 wt.-% of at least one second-drying oil selected from the group consisting of linseed oil, sunflower oil, safflower oil, soya oil, poppy seed oil, perilla oil, hemp seed oil, cottonseed oil, sesame oil, corn oil, flaxseed oil, grapeseed oil, walnut oil, chia oil, and camelina oil; 0.01 to 2.00 wt.-% of at least one drying agent metal basis, as set out in detail above; 0.50 to 10.00 wt.-% of at least one acylphosphine oxide photoinitiator [hereinafter compound(P1)] chosen from bis(4-methylphenyl)(2,4,6-trimethylbenzoyl)phosphine oxide; phenylbis(2,4,6-10-trimethylbenzoyl)phosphine oxide; α-hydroxyalkylphenone photoinitiator [hereinafter compound(P2)] according to Formula(IP2), where compound(P2) is present in an amount,determined by a weight ratio of compound(P2) to compound(P1), in the range of 0.5 to 10.0;15 Formula(IP2) equal to or less than 5.00 wt.-% of at least one radical polymerizable(meth)acrylic-functionalized compound;20 0.00 to 20.00 wt.-% of at least one micronized wax [hereinafter micronized wax(Mp)] with a particle size D90 equal to or smaller than 36 µm and a particle size D50 equal to or smaller than 20 µm; 0.00 to 20.00 of at least one pigment, as set out in detail above; and 0.00 to 11.00 wt.-% of at least one constituent(IC), as set out in detail above; 2025 / 5130 BE2025 / 5130 46 where the composition(C) has a total solids content equal to or greater than 90.00 wt.-% in relation to the total weight of the composition(C), and where the total solids content of the composition(C) is measured according to the standard ASTMD2369–20. According to a form that is preferred by the 5composition(C)ofthepresent invention, it holds that composition(C), as set out in detail above, comprises or essentially consists of, in proportion to the total weight of composition(C): 70.00 to 99.00% by weight [hereinafter wt.-%] of a triglyceride oil composition, where the triglyceride oil composition comprises, preferably essentially consists of, in proportion to the total weight of the triglyceride oil composition, 65.00 to 100.00 wt.-% of at least one first drying oil chosen from the group consisting of tung oil, calendula seed oil, pomegranate seed oil, linseed oil; and 35.00 to 0.00 wt.-% of at least one second drying oil chosen from the group consisting of linseed oil, sunflower oil, safflower oil, soybean oil, and walnut oil; 0.01 to 2.00 wt.-% of at least one metallic drying agent, where at least one metallic drying agent is a metallic salt where the metal cation component is chosen from the group consisting of manganese (Mn), iron (Fe), cobalt (Co), zirconium(Zr), and calcium(Ca); where the anion component is chosen from the group consisting of halides, nitrates, sulfates, aceto-acetonates, and carboxylates such as naphthenates, linoleates, octates, ethylhexanoates such as 2-ethylhexanoate, decanoates, neodecanoates, and dodecanoates;25 and where the metal-based salt may be in a complex with at least one nitrogen donor ligand chosen from the group consisting of monodentate, didentate, tridentate, quadrent, quintudentate, and hexadentate nitrogen donor ligands; 0.50 to 10.00 wt.-% of at least one acylphosphine oxide photo-30 initiator [hereinafter compound(P1)] chosen from bis(4- 2025 / 5130 BE2025 / 5130 47 methylphenyl)(2,4,6-trimethylbenzoyl)phosphine oxide; phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide; α-hydroxyalkylphenone photo-initiator [hereinafter compound(P2)] according to Formula(IP2), where compound(P2) is present in an amount, determined by a weight ratio of compound(P2) to compound(P1), in the range of 0.5 to 10.0; Formula(IP2)equal to or less than 5.00 wt.-% of at least one radical polymerizable(meth)acrylic-functionalized compound; optionally 2.00 to 20.00 wt.-% of at least one micronized wax [hereinafter micronized wax (Mp)] with a particle size D90 equal to or smaller than 36 µm and a particle size D50 equal to or smaller than 20 µm; 15 0.00 to 20.00 of at least one pigment, as set out in detail above; and optionally 0.10 to 11.00 wt.-% of at least one constituent (IC), as set out in detail above; where the composition(C) has a total solid content equal to or greater than 90.00 wt.-% in relation to the total weight of the composition(C), and where the total solid content of the composition(C) is measured according to the standard ASTMD2369–20. According to a more preferred form of the composition(C) of the present invention, the composition(C), as set out in detail above, comprises, or essentially consists of, inratio to total weight of composition(C): 2025 / 5130 BE2025 / 5130 48 70.00 to 99.00% by weight [hereinafter wt.-%] of a triglyceride oil composition, where the triglyceride oil composition comprises, preferably in essence consists of, in proportion to the total weight of the triglyceride oil composition, 65.00 to 100.00 wt.-% of at least one first drying oil chosen from tung oil, or calendula seed oil; and 35.00 to 0.00 wt.-% of at least one second drying oil chosen from the group consisting of linseed oil, sunflower oil, safflower oil, soybean oil, and walnut oil; 0.01 to 2.00 wt.-% of at least one metal-based desiccant, where at least one metal-based desiccant is a metal-based salt where the metal cation component is chosen from the group consisting of manganese (Mn), iron (Fe), cobalt (Co), zirconium (Zr), and calcium (Ca); where the anion component is chosen from the group consisting of halides, nitrates, sulfates, aceto-acetonates, and carboxylates such as naphthenates, linoleates, octates, ethylhexanoates15such as 2-ethylhexanoate, decanoates, neodecanoates, endodecanoates; and where the metal-based salt may be in a complex with at least one nitrogen donor ligand selected from the group consisting of monotongue, ditongue, tritongue, quadratgue, quintetrate, and hexatongue nitrogen donor ligands; 20 0.60 to 8.00 wt.-% of at least one acylphosphine oxide photoinitiator [hereinafter compound(P1)] selected from bis(4-methylphenyl)(2,4,6-trimethylbenzoyl)phosphine oxide; offenylbis(2,4,6-trimethylbenzoyl)phosphine oxide; α-hydroxyalkylphenone photoinitiator[hereinafter compound(P2)] according to Formula(IP2), where compound(P2) is present in an amount, determined by a weight ratio of compound(P2) to compound(P1), in the range of 0.6 to 9.0; 2025 / 5130 BE2025 / 5130 49 Formula(IP2) equal to or less than 5.00 wt.-% of at least one radical polymerizable(meth)acryl-functionalized compound; possibly 2.00 to 20.00 wt.-% of at least one micronized wax[hereinafter micronized wax(Mp)] withparticle size D90 equal to or smaller than 36µm and a particle size D50 equal to or smaller than 20µm; 0.00 to 20.00 of at least one pigment, as set out in detail above; and possibly 0.10 to 11.00 wt.-% of at least one constituent (IC), as set out in detail above; where the composition (C) has a total solids content equal to or greater than 92.50 wt.-% in relation to the total weight of the composition (C), and where the total solids content of the composition (C) is measured according to the standard ASTMD2369–20. According to a form of execution that is even more preferred of the composition(C) of the present invention, the composition(C), as set out in detail above, comprises, or essentially consists of, in proportion to the total weight of the composition(C): 20 75.00 to 99.00% by weight [hereinafter wt.-%] of a triglyceride oil composition, where the triglyceride oil composition comprises, preferably essentially consists of, in proportion to the total weight of thetriglyceride oil composition, 75.00 to 95.00 wt.-% of at least one first-drying oil selected from tung oil, or 25 calendula seed oil; and 25.00 to 5.00 wt.-% of at least one second-drying oil selected from the group consisting of linseed oil, sunflower oil, safflower oil, soybean oil, and walnut oil; 0.01 to 2.00 wt.-% of at least one metal-based desiccant, where the at least one metal-based desiccant is a metal-based salt where the metal cation component is chosen from the group consisting of manganese (Mn), iron (Fe), and cobalt (Co); where the anion component is chosen from the group consisting of halides, acetoacetonates, and carboxylates such as naphthenates, linoleates, octoates, ethylhexanoates such as 2-ethylhexanoate, decanoates, neodecanoates, and dodecanoates; and where the metal-based salt may be in a complex with at least one nitrogen donor ligand that is chosen from the group consisting of monototal, bitotal, tritotal, quadrotal, five-total, and hexadentate nitrogen donor ligands;0.70 to 6.00 wt.-% of at least one acylphosphine oxide photoinitiator [hereinafter compound(P1)] chosen from bis(4-10 methylphenyl)(2,4,6-trimethylbenzoyl)phosphine oxide; phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide; α-hydroxyalkylphenone photoinitiator [hereinafter compound(P2)] according to Formula(IP2), where compound(P2) is present in an amount, determined by a weight ratio of compound(P2) to compound15 (P1), in the range of 0.7 to 8.0; Formula(IP2) equal to or less than 5.00 wt.-% of at least one radical20 polymerizable(meth)acryl-functionalized compound; possibly 5.00 to 20.00 wt.-% of at least one micronized wax [hereinafter micronized wax (Mp)] with a particle size D90 equal to or smaller than 36µm and a particle size D50 equal to or smaller than 20µm; 25 0.00 to 20.00 of at least one pigment, as set out in detail above; and 2025 / 5130 BE2025 / 5130 51 possibly 0.10 to 11.00 wt.-% of at least one constituent (IC), as set out in detail above;where the composition(C) has a total solids content equal to or greater than 95.00 wt.-% in relation to the total weight of the composition(C), and where the total solids content of the composition(C) is measured according to the standard ASTMD2369–20. According to a form of execution that is even more preferred of the composition(C) of the present invention, the composition(C), as set out in detail above, comprises, or essentially consists of, in proportion to the total weight of the composition(C): 10 75.00 to 99.00% by weight [hereinafter wt.-%] of a triglyceride oil composition, where the triglyceride oil composition comprises, or essentially consists of, in proportion to the total weight of the triglyceride oil composition, 75.00 to 95.00 wt.-% of tung oil as the at least first drying oil; and 25.00 to 15 5.00 wt.-% of linseed oil as the at least second drying oil; 0.01 to 2.00 wt.-% of at least one metal-based desiccant, where at least one metal-based desiccantis a metal-based salt where the metal cation component is chosen from the group consisting of manganese (Mn), iron (Fe), and cobalt (Co); where the anion component is chosen from the group consisting of halides, acetoacetonates, and carboxylates such as naphthenates, linoleates, octoates, ethylhexanoates such as 2-ethylhexanoate, decanoates, neodecanoates, and dodecanoates; and where the metal-based salt may be in a complex with at least one nitrogen donor ligand that is chosen from the group consisting of monodentate, didentate, tridentate, quadrentate, quintuplet, and hexadentate nitrogen donor ligands; 0.80 to 4.00 wt.-% of at least one acylphosphine oxide photoinitiator [hereinafter compound(P1)] chosen from bis(4-30 methylphenyl)(2,4,6-trimethylbenzoyl)phosphine oxide; offenylbis(2,4,6-trimethylbenzoyl)phosphine oxide; 2025 / 5130 BE2025 / 5130 52 α-hydroxyalkylphenone photoinitiator [hereinafter compound(P2)] according to Formula(IP2), where compound(P2) is present in an amount determined by a weight ratio of compound(P2) to compound(P1), in the range of 0.8 to 7.0; 5 Formula (IP2) equal to or less than 5.00 wt.-% of at least one radical polymerizable (meth)acrylic functionalized compound; optionally 5.00 to 15.00 wt.-% of at least one micronized wax [hereinafter micronized wax (Mp)] with a particle size D90 equal to or smaller than 36 µm and a particle size D50 equal to or smaller than 20 µm; 0.00 to 20.00 of at least one pigment, as detailed above; and optionally 0.10 to 11.00 wt.-% of at least one constituent (IC), as detailed above; where the compound(C) has a total solid content equal to or greater than 97.00 wt.-%, in proportion to the total weight of the compound(C), and where the total solid content of the compound(C) is measured according to the standard ASTMD2369–20. For the purposes of the present invention, the expression “essentially consists of” means that, in proportion to the total weightweight of the composition(C), any additional component other than the triglyceride oil composition, as set out in detail above, the at least one metal-based drying agent, as set out in detail above, the at least one compound(P1), as set out in detail above, the compound(P2) according to Formula(IP2), as set out in detail above, and, 2025 / 5130 BE2025 / 5130 53 if present, the at least one micronized wax(Mp), as set out in detail above, and, if present, the at least one pigment, as set out in detail above, and, if present, the at least one component(IC), as set out in detail above, is present in small quantities in the said composition(C), assuming that the latter does not significantly change. Another aspect of the present invention is a method for the preparation of the compound(C), as set out in detail above. Furthermore, it is assumed that all definitions and preferences, as above10described, are equally applicable to all other forms of execution described below. The composition(C) of the present invention can be prepared using various methods known in the field. For the preparation of composition(C) of the present invention, various methods known in the field can be successfully used. In one form of the present invention, the method for the preparation of the composition(C), as set out in detail above, the thorough mixing of the triglyceride oil composition, as set out in detail above, the at least stone desiccant on a metal basis,20 as set out in detail above, the at least stone compound(P1), as set out in detail above, the compound(P2) according to Formula (IP2), as set out in detail above, possibly the at least stone micronized wax(Mp), as set out in detail above, possibly the at least stone pigment, as set out in detail above, and possibly the at least stone 25additional component (IC), as set out in detail above. According to one form of the present invention, the method for preparing the composition (C), as set out in detail above, comprises the following steps of thoroughly mixing: 60.00 to 99.00% wt. of a triglyceride-30 oil composition, as set out in detail above; 2025 / 5130 BE2025 / 5130 54 0.01 to 2.00 wt. of at least one metal-based drying agent, as set out in detail above; 0.50 to 10.00 wt. of at least one compound (P1), as set out in detail above; compound(P2) according to Formula(IP2), as set out in detail above5, where the compound(P2) is present in an amount, determined by a weight ratio of compound(P2) to compound(P1), in the range of 0.5 to 10.0; possibly at least one micronized wax(Mp), as set out in detail above;10 possibly at least one pigment, as set out in detail above; possibly at least one component(IC), as set out in detail above;where all wt. % are in proportion to the total weight of the composition(C), and where the mixing of at least one micronized wax(Mp), if present, is carried out at a temperature lower than the melting point of the said micronized wax(Mp). In the context of the present invention, it should further be assumed that for the preparation of the composition(C), as set out in detail above, the triglyceride oil composition, as set out in detail above, is prepared from at least one first drying oil, as set out in detail above, and where the said at least one first drying oil is possibly further mixed with at least one second drying oil, as set out in detail above. In the context of the present invention, it is assumed that the at least one second drying oil can be mixed, but does not need to be mixed with the first drying oil before being mixed with the other main components of the composition(C). According to a preferred method of execution of the method for thepreparation of the composition(C) of the present invention, as set out in detail above, the triglyceride oil composition, as set out in detail above as part of the composition(C), is first prepared by mixing at least one first drying oil, as set out in detail above, and at least one second drying oil, as set out in detail above.5 In general, the said thorough mixing, as set out in detail above, can be carried out using traditional mixers and blenders, high-intensity mixers and electric stirrers, where the said mixers, blenders and stirrers may be equipped with at least one dispersion disc.10 Non-limiting examples of high-intensity mixers include in particular the high-intensity mixers that are commercially available from Dispermill, and at ROSS Mixers. Non-restrictive examples of dispersion discs include in particular the dispersion discs commercially available from Dispermill.15It is assumed that skilled workers will carry out the said thorough mixing in accordance with common practices, such as using optimal durations, speeds, weights, volumes and batch quantities. Furthermore, it is assumed that any order of thorough mixing of the various components as part of the composition(C),20 as set out in detail above, is acceptable. Another aspect of the present invention is a method for treating a surface or at least part of a surface of a wood product whereby the said wood product is treated with the composition(C), as set out in detail above.25 Furthermore, it is assumed that all definitions and preferences, as described above, apply equally to all other forms of execution described below. Furthermore, it is assumed that when a surface or at least a part of a surface of a wood product is treated with the 30 composition(C), as set out in detail above, the composition(C)can harden or cure by photo-assisted oxypolymerization at 2025 / 5130 BE2025 / 5130 56 exposure to the combination of irradiation by visible light, such as irradiation by visible light with a wavelength in the range of 380nm to 750nm, and molecular oxygen, as described above. Exposure to irradiation by visible light can, for example, be achieved with sources of indoor lighting such as daylight through glass, LED lamps, or fluorescent lamps5 that provide the visible light. By way of non-limiting examples of suitable wood products, mention can be made of decking boards, cladding, roof shingles, furniture, veneer, flooring and wood-based composite panels such as particleboard (PB), hardboard, plywood, oriented strand board (OSB),10 flakeboard, fibreboard, as well as medium-density fibreboard (MDF) and high-density fibreboard (HDF). In general, the method for treating the surface or at least a part of the surface of the wood product is not limited towood products made from a specific type of wood.15 Non-restrictive examples of suitable wood types include in particular i. hardwood, such as wood from dicotyledonous trees such as ash, mahogany, iroko, beech, oak, maple, birch, walnut, teak, alder, aspen, elm, gum, poplar or willow, ii. softwood, such as wood from conifers such as larch, pine, spruce, Douglas fir, Canadian pine, sequoia or spruce, or iii. certain other lignocellulose materials20 such as bamboo or hemp. By way of non-restrictive examples, suitable hardwood flooring includes in particular solid hardwood flooring such as solid parquet, or engineered hardwood flooring such as engineered parquet. Preferred wood products are chosen from furniture, solid25 hardwood flooring or engineered hardwood flooring. Among the subordinate ways to apply the composition(C), as set out in detail above, to the surface or at least part of the surface of the wood products, as set out in detail above, mention can be made in particular of conventional application methods which30known among professionals in the field of wood coating compositions such as painting; spraying, such as air mist spraying, air-assisted spraying 2025 / 5130 BE2025 / 5130 57 and non-air spraying; flow coating; transfer coating; roller coating; brushing; impregnating; dipping; smearing; curtain coating; and the like, with the aid of conventional equipment such as, but not limited to, a spray machine, a roller coating machine, a cloth, a brush, a sponge, a pad polishing machine, and the like. Preferably the composition(C) is applied5 to the surface or at least part of the surface of the wood products by spreading it with a pad polishing machine, or by spreading or impregnating it with a sponge, a brush or a cloth. In general, after the composition(C), as detailed above, has been applied to the surface or at least part of the surface of the wood products, as detailed above, the applied composition(C) can then be finally polished duringat least one polishing step. The at least one polishing step can be performed by hand, for example with the aid of a cloth, or with the aid of a pad polishing machine. In the event that an excess of the applied composition(C) is present on the surface or at least part of the surface of the wood products, the said excess must be removed in time during at least one removal step. The at least one removal can be performed by hand, for example with the aid of a cloth, or with the aid of a pad polishing machine. If desired, before applying the composition(C), as explained in detail above, the surface or at least part of the surface of the wood products is pre-roughened, for example by mechanical sanding. The composition(C) can be applied in small quantities to the surface or at least part of the surface of wood products, for example in a quantity (on a wet basis) of 5.0 grams per square meter [hereinafter g / m²] up to and including 50.0 g / m², preferably from 5.0 g / m² up to and including 40.0 g / m²,preferably from 10.0 to 20.0 g / m², resulting in thin layers applied as a coating, for example with an average thickness of 5.0 to 30 50.0 microns, preferably from 5.0 to 40.0 microns, after drying and curing. 2025 / 5130 BE2025 / 5130 58 Another aspect of the present invention is a coating applied by means of the method for the treatment of the surface or at least part of the surface of the wood product, as set out in detail above, whereby the said wood product is treated with composition(C), as set out in detail above. Furthermore, it is assumed that all definitions and preferences, as described above, apply equally to all other forms of execution described below. The inventors have surprisingly found that when the 10 surface or at least part of the surface of wood products is treated with the composition(C) of the present invention, as set out in detail above, the resulting layer applied as a coatingnow exhibits a rapid build-up of hardness and at the same time continues to exhibit at least good properties in terms of film formation, i.e. without the film formation being compromised or hindered, as well as good mechanical properties in terms of hardness, as demonstrated in the experimental section. In combination with a rapid build-up of hardness and good properties in terms of film formation, the inventors have in particular surprisingly observed that when the composition(C) with 20 high solids content of the present invention is applied to wood products, which leads to the formation of layers of the said composition(C) applied as coatings on the said wood products, a sufficiently high hardness can easily be achieved within a few days after application, or even 24 hours after application, and without further need for 25 use of one or more isocyanate-based accelerators known to professionals in the field of wood coating compositions for further improvement of the drying properties and kinetics of wood coating compositions (i.e.thereby a shortened drying time or accelerated drying is obtained in the presence of such one or more isocyanate-based accelerators).30 The application of the composition(C) to the surface or at least part of the surface of wood products can yield thin layers applied as a coating, for example, layers applied as a coating with an average thickness of 5.0 to 50.0 microns, preferably 5.0 to 40.0 microns, subsequently drying and curing. Another aspect of the present invention is a use of the composition(C), as set out in detail above, in the method for the treatment of the surface or at least part of the surface of the wood product, as set out in detail above. Furthermore, it is assumed that all definitions and preferences, as described above, apply equally to all other forms of execution described below.10 According to one form of execution of the composition(C) of the present invention, the composition(C), as detailed aboveset out, a one-part system or a single system, which is stored as such, for example, in a container or a tin, for example, a metal tin, as the one part.15 With advantage, the composition(C), as set out in detail above, is stable to store, i.e. the said composition(C) can be stored for a period of several months to a year and longer without changing to the extent that this is relevant for its use with regard to the properties concerning its application or20 the properties after oxidative drying. In a single-part system, the composition(C), as set out in detail above, can for example be prepared just before the said composition(C) is introduced into the said single part. Alternatively, in a single-part system, the composition(C), as set out in detail above, can for example be prepared by the triglyceride oil composition, as set out in detail above, the at least one metal-based drying agent, as set out in detail above, the at leastone compound(P1), as set out in detail above, the compound(P2) according to Formula(IP2), as set out in detail above, possibly the at least one micronized wax(Mp), as set out in detail above, possibly the at least one pigment, as set out in detail above, and 2025 / 5130 BE2025 / 5130 60 possibly the at least one additional component(IC), as set out in detail above, to be added to the said single part, whereby the composition(C) in the said single part is formed. Instead of preserving the composition(C), as set out in detail above, as a one-part system, the composition(C), as set out in detail above5, can, if desired, be a multi-part system comprising at least two complementary parts, where the said at least two complementary parts are a first complementary part and a second complementary part, and possibly one or more additional complementary parts, such as a two-part system consisting of the first10 complementary parts and the second complementary part, where the saidat least two complementary parts combined