ARTIFICIAL GRASS GLUE

Description

1 ARTIFICIAL GRASS ADHESIVE TECHNICAL DOMAIN The invention relates to an adhesive composition, more specific compositions for bonding grass. STANDARD TECHNOLOGY The standard technology regarding artificial grass adhesives focuses on compositions that have been specially developed to firmly and durably attach artificial grass to a substrate and / or to repair seams between artificial grass strips. Such adhesives are characterized by properties such as strong adhesion, water resistance, and flexibility to accommodate expansion and contraction of both the artificial grass and the substrate. Artificial grass adhesives are used in various environments, including sports fields, gardens, roof terraces, and even interior cladding, and are intended to withstand prolonged loads and exposure to varying climatic conditions. A key focus in the current standard technology is the ability of artificial grass adhesives to perform consistently in different weather conditions.Many of the available adhesives offer insufficient adhesion on damp or slightly damp substrates, which leads to reduced durability of the installation. This problem is particularly relevant in regions with a moderately damp or humid climate, where rainfall and high humidity are common. Moreover, the curing speed of existing adhesives can be problematic: curing too quickly complicates correct application, while curing too slowly significantly prolongs the time until the artificial turf field can be put into use. Another problem in current technology concerns the long-term stability of artificial grass adhesives under the influence of UV radiation, temperature fluctuations, and mechanical stress. Over time, this can lead to degradation of the adhesive, resulting in loosened seams or reduced adhesion to the substrate. The chemical composition of some adhesives also raises questions, particularly regarding emissions of volatile organic compounds (VOCs) and the environmental impact.Existing adhesives may also lack flexibility, which is essential to prevent tearing or fractures in the adhesive layer during movements of the artificial grass or the sub-base. The present invention aims to find a solution for at least some of the above-mentioned problems.5 SUMMARY OF THE INVENTION In a first aspect, the invention concerns an artificial grass adhesive according to conclusion 1. Further preferred forms are listed in conclusions 2 to 16. The invention offers 10 advantages such as improved adhesion on both dry and slightly damp substrates, which facilitates application in diverse climatic conditions. The composition combines flexibility and durability, making it resistant to mechanical loads and prolonged exposure to UV radiation and weather influences. In addition, the specific formulation ensures a 15 low emission of volatile organic compounds, which enhances environmental friendliness and safety.The ease of use is further supported by compatibility with various tools, enabling both professionals and DIYers to efficiently and reliably install or repair artificial grass. 20 In a second aspect, the invention concerns a use of the composition according to claims 17 to 19. Finally, in one of the aspects, the invention concerns a sealant according to claim 20. DETAILED DESCRIPTION25 In a first aspect, the invention concerns an adhesive composition for use in bonding artificial grass to a substrate. The composition is obtained by mixing at least one or more realiphatic prepolymers in a concentration of 10-30 wt%, one or more stabilizers in a concentration of 30 0.1-2 wt%, and one or more chalking agents in a concentration of 50-80 wt%. The composition is a one-component adhesive, in which the one or more realiphatic prepolymers and the one or more stabilizers comprise a ratio between 30:1 and 40:1. Furthermore, one or more realiphatic prepolymers and one or more chalking agents comprise a ratio between 1:3 and 1:4.35 BE2025 / 5077 3 Artificial grass adhesive is a component in the installation of artificial grass systems and plays an important role in ensuring a durable bond between the grass mats and the sub-base. These adhesives are designed to function under varying conditions, where both mechanical and chemical properties contribute to a strong and long-lasting bond. The choice of the right adhesive depends on various factors, including the nature of the sub-base, exposure to weather influences, and the specific requirements of the intended use. Artificial grass adhesives must withstand environmental factors such as rain, temperature variations, and mechanical stress from intensive use. This requires a composition that offers not only flexibility and strength but also stability over a longer period, even under challenging conditions. By combining these properties, an artificial grass adhesive can improve the reliability and lifespan of the entire system.The present invention aims to provide a solution to existing limitations, enabling a broader15 application area and better performance under real-world conditions. In one form, the artificial grass adhesive is highly suitable for a Northwest European climate, which is characterized by fluctuating temperatures, frequent rainfall, and high relative humidity throughout the year. 20 In one form, the composition comprises aliphatic prepolymers; a specific class of synthetic compounds that play a role in the formulation of high-performance adhesives, including artificial grass adhesive. Prepolymers are reactive intermediates that form partially cured polymers and can be converted into fully cured polymers by means of chemical reactions. In the case of aliphatic prepolymers, the basic structures are composed of aliphatic chains, which means that the molecules consist mainly of straight or branched carbon chains without aromatic rings.This structure results in properties such as excellent flexibility, UV resistance, and a high degree of chemical stability.30 Within this class, aliphatic polyurethanes and polyesters are primarily among the most used compounds, such as an aliphatic silane-terminated polyurethane. Aliphatic polyurethanes are obtained by the reaction of aliphatic isocyanates, such as hexamethylene diisocyanate (HDI) or isophorone diisocyanate35 (IPDI), with polyols. These compounds are characterized by their flexibility and their resistance to yellowing upon exposure to sunlight, which is a crucial BE2025 / 5077 4 property in applications such as artificial grass adhesive. Aliphatic polyesters, on the other hand, are synthesized from aliphatic dioles and aliphatic dicarboxylic acids and offer excellent elasticity and chemical resistance. In a preferred form, the composition comprises an aliphatic silane-terminated polyurethane. 5 In artificial grass adhesive, aliphatic prepolymers serve as the basis for the adhesion reaction.When the adhesive is applied, prepolymers react with moisture in the air or in the substrate, leading to the formation of a fully cured polymer. This curing process, also known as polyaddition, takes place via the reactive isocyanate groups in the prepolymers, which bond with water molecules and thereby form carbamates (urethane compounds). This chemical transformation ensures the development of a durable and elastic bond that is resistant to mechanical stress and environmental influences. The use of aliphatic prepolymers in artificial grass adhesive offers specific advantages, including long-lasting UV stability, which is essential for outdoor applications, and high resistance to moisture, which contributes to the suitability of the adhesive for both dry and slightly damp substrates. Furthermore, the flexibility and strength of the resulting polymers ensure that the artificial grass system is resistant to temperature fluctuations and mechanical stress, which enhances the lifespan and functionality of the system as a whole.In a formulation, one or more aliphatic prepolymers are selected from the group of, but not limited to, hexamethylene di-isocyanate (HDI), isophorone di-isocyanate (IPDI), 1,6-hexandiol, trimethylolpropane (TMP), 1,4-butanediol, 25 polyetherdiols, polypropylene glycol (PPG), polybutylene glycol (PBG), aliphatic diols, polycarboxylic acid esters, aliphatic polyesters, polycaprolactone, pentaerythritol, neopentyl glycol, 1,3-propylene glycol, adipic acid, sebacic acid, dodecandioic acid, azelaic acid, terephthalic acid, polyurethane prepolymers based on aliphatic isocyanates, A-174 (3-aminopropyltriethoxysilane), A-1100 (aminosilane), MPS30 (Methacryloxypropyltrimethoxysilane),GLYMO(Glycidoxypropyltrimethoxysilane), KH-560(3-mercaptopropyltrimethoxysilane),A-172(Vinyltriethoxysilane),GPTMS (Glycidoxypropyltrimethoxysilane),DOWSILZ-6020(Trimethoxyvinylsilane),Si-69 (Vinyltris(2-methoxyethoxy)silane),3-aminopropyltriethoxysilane(APS). 35 In a preferred form, the one or more realiphatic prepolymers comprise at least one silane group.Aliphatic prepolymers with a silane group offer specific BE2025 / 5077 5 benefits for artificial grass adhesive, as the silane group improves adhesion to various substrates. Silane groups, such as alkoxysilanes (for example, trimethoxysilane or silanol), can strengthen the bond between the adhesive and the substrate. This results in better durability and resistance to environmental factors. The presence of a silane group also contributes to the water resistance of the adhesives and improves adhesion in case of slight moisture of the substrate. In one form, the prepolymers are selected from the group of, but not limited to, A-174 (3-aminopropyltriethoxysilane), aminosilane diaminotrimethoxysilane, A-1100 (aminosilane), MPS (Methacryloxypropyltrimethoxysilane), GLYMO (Glycidoxypropyltrimethoxysilane), KH-560(3-mercaptopropyltrimethoxysilane),A-172(Vinyltriethoxysilane),GPTMS (Glycidoxypropyltrimethoxysilane),DOWSILZ-6020(Trimethoxyvinylsilane),Si-69 (Vinyltris(2-methoxyethoxy)silane),3-aminopropyltriethoxysilane(APS).Preferably, the composition comprises aminosilane diaminotrimethoxysilane. 15 In a further form containing one or more reliphatic prepolymers with a viscosity between 10,000 and 100,000 mPa*s, measured according to ISO 3219. The one or more realiphatic prepolymers are present according to a formulation in a concentration between 0 wt% and 50 wt%, more preferably between 10 wt% and 40 wt%, even more preferably between 10 wt% and 30 wt%.20 In a formulation, the composition includes stabilizers. Stabilizers that play a role in artificial grass adhesive, particularly for outdoor use in a Northwest European climate, promote the performance of the adhesive under varying weather conditions. In this climate, characterized by frequent rainfall,25 temperature differences and relatively high humidity, stabilizers must help the adhesive to withstand the influence of these environmental factors. UV stabilizers are an important category for artificial grass adhesive used outdoors.These stabilizers protect the adhesive against degradation by sunlight, which can otherwise lead to discoloration, hardening, or loss of adhesion. UV absorbers30 or nuisance-free UV stabilizers, such as benzotriazoles or nuisance-free irritants, help protect the chemical compounds in the adhesive against the harmful effects of UV rays. Oxidation stabilizers, such as nuisance-free amines (HALS), influence the35 stability of the adhesive. HALS can prevent polymer degradation by blocking oxygen reactions, which extends the lifespan of the adhesive, especially when exposed to moisture and air. These stabilizers are important in a climate with heavy rainfall, where humidity can affect the adhesive. In addition, stabilizers that protect the chemical properties of the adhesive against moisture infiltration can also be important. Hydrophobic additives, such as silanes or silicones, improve the water resistance of the adhesive. These stabilizers prevent water from penetrating the adhesive and degrading the adhesion or structure of the adhesive.Finally, antioxidants such as butylhydroxytoluene (BHT) can be added to slow down the aging of the adhesive due to interaction with air or UV light, allowing the adhesive to retain its performance longer, even under the stress of weather changes and use in an outdoor environment. In a formulation, the stabilizers are selected from the group of, but not limited to, benzotriazoles (such as 2-(2H-benzotriazol-2-yl)-4,6-di-tert-butylphenol), Hindered Amine Light Stabilizers (HALS), benzophenones (such as 2-hydroxy-4-methoxybenzophenone), UV-absorbing acrylates (e.g., 2,4-dihydroxybenzophenone), triazines (such as 2,4-dihydroxybenzotriazine), phenyltriazines, octocrylene, ethylhexylmethoxycinnamate, 2,2,4-20 trimethylpentanediol monoisobutyrate, cyanoacrylate UV absorbers, methacrylate UV absorbers, silica-based UV stabilizers. Preferably, one or more stabilizers include at least triazines. Furthermore, the one or more stabilizers are present in a concentration of 0.1 wt% to 5 wt%, more preferably of 0.1 wt% to 3 wt%, even more preferably of 0.1 wt% to 2 wt%. In one formulation, deliphatic prepolymers and stabilizers are present in a ratio between 30:1 and 40:1. In another formulation, the composition includes chalk. Chalk is added as a filler to reduce costs, increase the volume of the adhesive, and improve viscosity, which facilitates application. Due to its fine, powdery structure, chalk helps to achieve a homogeneous distribution of other components in the adhesive, which ensures consistent performance over the entire surface. 35 In addition to its role as a filler, chalk also contributes to the watertightness of the adhesive. It can act as a barrier against water infiltration by building up a dense BE2025 / 5077 7 layer in the final adhesive film. This prevents water from penetrating the adhesive, which is essential for applications exposed to outdoor conditions, such as artificial grass installations. Chalk can also help improve adhesion to damp substrates by increasing the surface tension of the adhesive.5 The addition of chalk therefore not only provides cost advantages and structural benefits, but also plays a role in improving the water resistance of the adhesive, which is important for long-term performance in a humid, variable outdoor environment.10 In one form, the chalk comprises various types of powders, such as green powder, black powder, yellow powder and / or coated calcium carbonate. Coated calcium carbonate is often used as a filler in adhesives, such as artificial grass adhesive, because of the benefits the coating offers. The coating, selected from, but not limited to, silanes and stearates, improves the dispersion of the calcium carbonate in the adhesive, thereby improving the processing properties and viscosity. It also ensures better adhesion between the calcium carbonate and the adhesive matrix, which increases the mechanical strength and stability of the adhesive. Furthermore, the coating helps to improve water resistance by preventing moisture from penetrating the calcium carbonate penetrates, which increases the water resistance of the adhesive, which is important for outdoor applications.In a preferred form, the chalk comprises chromium oxides and / or iron oxides. Additionally, the coating contributes to the thermal and chemical stability of the adhesive, making the adhesive more resistant to temperature fluctuations and UV radiation. This makes coated calcium carbonate a valuable addition to adhesives used outdoors, such as in a Northwest European climate. In one form, the chalk is present in a concentration between 50 wt% and 100 wt%, more preferably between 50 wt% and 90 wt%, and even more preferably between 50 wt%, 30 and 80 wt%. In one form, deliphatic prepolymers and the chalk are present in a ratio between 1:3 and 1:4. In a further form, the composition comprises one or more plasticizers, preferably at least one organic plasticizer. Plasticizers are substances that are added to the adhesive to improve flexibility, workability and adhesion properties. They reduce the viscosity of the adhesive, BE2025 / 5077 8 which facilitates application, and increase the flexibility of the final adhesive film.This is particularly important in applications such as artificial grass adhesive, where the adhesive must withstand temperature fluctuations, movement, and other mechanical loads. Organic plasticizers play a role in improving the viscoelastic properties of the adhesive. By increasing the flexibility of the adhesive, they ensure that the adhesive is more resistant to cracking, tearing, or other forms of damage that can occur during movement or tension. In outdoor environments, such as the use of artificial grass adhesive in a Northwest European climate, plasticizers can also help make the adhesive more resistant to the effects of UV radiation and moisture. This makes the adhesive more durable, even when exposed to adverse weather conditions such as rain, sun, and temperature fluctuations. The use of organic plasticizers in combination with other plasticizers or stabilizers can also help improve the long-term performance of the adhesive. They contribute to aging resistance by minimizing the influence of environmental factors such as humidity, oxygen, and UV light.This is important for artificial grass adhesive, which comes into prolonged contact with the environment and is subjected to the daily stresses of use and changing weather conditions. 20 In addition, plasticizers can improve adhesion to various substrates by optimizing interfacial interaction, ensuring a strong and long-lasting bond between the artificial grass and the sub-base material. In a form, the organic plasticizers are selected from the group of,25 but not limited to, phthalates, dioctyl phthalate (DOP), diisononyl phthalate (DINP), di(2-ethylhexyl)phthalate (DEHP), di-n-butyl phthalate (DBP), dioctyl sebacate, diisodecyl phthalate (DIDP), adipates, diisononyl adipate (DINA), dibutyl adipate (DBA), sebacates, di(2-ethylhexyl) sebacate (DEHS), butylbenzene, phosphates, triphenyl phosphate (TPP), triphenylphosphine oxide (TPPO), dioctyl phosphate (DOFP), tributyl phosphate (TBF),30 epoxidized soybean oil, glyceryl tributyrate, butyl glycolate, alkylbenzene, phthalate-free plasticizers (e.g.citrate acids), camphor, terephthalic acid esters, polypropylene glycol and / or aliphatic alcohols (such as 2-ethylhexanol). In a preferred form, the composition comprises organic plasticizers containing at least one phthalate, selected from the group of, but not limited to, dioctyl phthalate (DOP), diisononyl phthalate35 (DINP), di(2-ethylhexyl)phthalate (DEHP), di-n-butyl phthalate (DBP), diisodecyl phthalate (DIDP), di(2-ethylhexyl)phthalate (DEHP), bis(2-ethylhexyl)phthalate (BEHP), BE2025 / 5077 9 dimethyl phthalate (DMP), dibutyl phthalate (DBP), di(iso-octyl)phthalate (DIOP), di-n- octyl phthalate (DnOP), butylbenzyl phthalate (BBP), diisoheptyl phthalate (DIHP), preferably diisodecyl phthalate. In a further form, the composition comprises one or more crosslinkers.5 In an adhesive composition, crosslinkers ensure the curing process, whereby the material changes from a liquid or paste-like form into a solid, elastic structure. Crosslinkers react with moisture from the air or other reactive components in the composition, which leads to crosslinking between the polymer chains.This crosslinking process creates a stable and flexible network that is resistant to temperature fluctuations, moisture, and other environmental factors. In one formulation, the composition comprises crosslinkers with an alkoxy group. This group contains a reactive alkyl group that can interact with moisture in the air and thereby harden the composition. Preferably, the crosslinker is an alkoxysilane. These crosslinkers have a molecular weight between 100 g / mol and 250 g / mol. The molecular weight can be calculated theoretically. In one form, the silicone sealant according to the present invention comprises one or more crosslinkers selected from the group of 20 methyltrimethoxysilane, methyltriethoxysilane, vinyltrimethoxysilane, isobutyltrimethoxysilane and tetraethoxysilane, or any combination of the foregoing. Preferably, the silicone sealant comprises vinyltrimethoxysilane. These crosslinkers are preferably present at a concentration between 1 wt% and 5 wt%.25 In one form, the composition comprises one or more adhesion promoters at a concentration of 0.1 wt% to 10 wt%, preferably more from 0.1 wt% to 7 wt%; even more preferably from 0.1 wt% to 5 wt%, mostly preferably from 0.1 wt% to 3 wt%. Adhesion promoters are added to improve the adhesion of the adhesive30 on various substrates, for obtaining durable bonds between the artificial grass and the substrate. These substances promote interaction between the adhesives and the surface, especially with difficult-to-bond materials such as plastic, metal or non-porous surfaces. 35 The concentration of adhesion promoters influences the balance between adhesions and other properties such as viscoelastic behavior, workability and BE2025 / 5077 10 durability of the adhesive. Excessively high concentrations can disrupt the consistency and stability of the adhesive, while low concentrations may not provide sufficient adhesion for specific applications. The addition of these adhesion promoters is relevant for applications in outdoor environments, such as artificial grass installations, where the adhesive is exposed to various weather conditions.Adhesion promoters help ensure that the adhesive remains resistant to the effects of moisture, temperature fluctuations, and other environmental factors, thereby optimizing the lifespan of the artificial grass and the adhesion to the substrate.10 In a formulation, the adhesion promoter is selected from the group of, but not limited to, silane compounds, aminofunctional silanes, epoxysilanes, isocyanate silanes, titanates, zirconates, polyurethane adhesion promoters, aliphatic amines, polyamine compounds, organic phosphates, polyether-polyamide15 adhesion promoters, urethane-functionalized silanes, acrylic and methacrylate adhesion promoters, sulfide-ethiole group-containing compounds, aliphatic epoxides, and benzothiazyl silane compounds. In a preferred formulation, the adhesion promoters are aminosilane-based. 20 In a formulation, the composition includes a catalyst.Catalysts are added to the adhesive formulation to accelerate the reaction rate of the chemical processes involved in the curing or hardening of the adhesive, without being consumed in the process themselves. This results in a more efficient curing process and can significantly shorten the working time of the adhesive. In the case of artificial grass adhesive, where a strong and durable bond is required, catalysts can be specifically used to optimize the reaction time of the polymer or resin matrix used, so that the adhesive cures faster and achieves its maximum adhesion. Catalysts can promote a wide range of chemical reactions, depending on the type of adhesive and the binder used. In artificial grass adhesive, for example, organic peroxides, salts of organic acids, or metals such as titanium and zirconium can be used as catalysts to accelerate the polymerization or crosslinking reactions.This is of particular importance in applications that need to be operational quickly, such as when fixing artificial grass to substrates that are regularly in use and where long-term loading is expected. BE2025 / 5077 11 The use of a catalyst makes it possible to more accurately match the properties of the adhesive, such as curing time, viscoelasticity and durability, to the requirements of the specific application. In outdoor environments such as a Northwest European climate, where temperature fluctuations and moisture affect the performance of adhesives, catalysts can contribute to optimal curing and maintaining the quality of the adhesion, even under adverse conditions. In a formulation form, the catalyst is added to the composition at a concentration of 0.01 wt% to 1 wt%, preferably more from 0.01 wt% to 0.7 wt%, even more preferably from 0.01 wt% to 0.5 wt%, and most preferably from 0.01 wt% to 0.3 wt%.Furthermore, the catalyst can be selected from the group of, but not limited to, organic peroxides, benzoyl peroxide, cumene peroxide, tert-butyl hydroperoxide, dicumyl peroxide, methyl ethyl ketone peroxide, azodicarbonamide, salts of organic acids, zirconium compounds, titanium compounds, nickel salts, tin compounds, aluminum trifluoride, cobalt compounds, iron salts, organic amines, dimethylethanolamine, triethylamine, ethylenediamine, dibutyltin dilaurate, dibutyltin di(2-ethylhexanoate), dibutyltin dioctyl maleate, zinc and manganese compounds, organic thiols, thiourea compounds, polyurethane catalysts, isocyanates, phosphate compounds, urea compounds. In a preferred form, the composition comprises dioctyltin oxide. In a molded form, the composition exhibits a Shore A hardness of 5 to 25, preferably 70, more 10 to 50. Shore A hardness is a measure of the flexibility or stiffness of a material and is measured using a durometer, which measures the resistance a pin offers against indentation in the material.A Shore A hardness between 10 and 50 indicates a material that is relatively soft to moderately firm, which is suitable for applications where a balance between flexibility and strength is required, such as in artificial grass adhesive. A lower Shore A hardness, closer to 10, means that the material is more flexible and pliable, which can be useful when the adhesive is exposed to movement or expansion and contraction of the artificial grass and the substrate, for example. On the other hand, a higher Shore A hardness, closer to 50, results in a firmer adhesive that is more resistant to mechanical loads and wear, which is important in environments with intensive use and where greater adhesion strength is required. Achieving the desired Shore A hardness depends on the composition of the adhesive, including the polymers, fillers, plasticizers, and catalysts used. 5 Adjusting the ShoreA hardness is a strategic scheme to tailor the performance of the artificial grass slime to specific requirements such as flexibility, wear resistance and adhesion durability.This is of particular importance in outdoor environments, such as in a Northwest European climate, where temperature fluctuations and exposure to moisture affect the properties of the adhesive10. By optimizing the ShoreA hardness, the adhesive can better cope with various weather conditions and the long-term loads that artificial grass installations typically undergo. In a specific form, the composition exhibits a tensile strength of 0.5 N / m² to 15 N / m², preferably 1 N / m² to 3 N / m², and most preferably 1 N / m² to 2 N / m², measured according to ISO 8339 at 100% deformation. Tensile strength is a measure of the maximum force a material can withstand before it breaks or tears. A tensile strength of 1 to 2 N / m² indicates how well the adhesive resists loads and stress without loss of structural integrity. This is a crucial property for artificial grass adhesive, as the adhesive must function under both dynamic loads and static forces, such as those caused by foot traffic, temperature fluctuations, and humidity.ISO 8339 is the standard used to measure the tensile strength of adhesives under specific conditions, including testing the adhesive at 100% deformation, which means that the adhesive is fully stretched until the material reaches maximum tension. The tensile strength in this form suggests that the artificial grass adhesive offers sufficient strength to hold the artificial grass mat firmly in place, even under heavy load. At the same time, the lower tensile strength compared to some stronger industrial adhesives offers the necessary flexibility, which is important in applications such as artificial grass, where some movement or stretch is required without the adhesive breaking or losing its adhesion. The tensile strength of the adhesive is influenced by the composition, such as the polymers, fillers, and any crosslinkers or other additives used that improve the structural integrity of the adhesive.This strength is also important for the BE2025 / 5077 13 durability of the adhesive in outdoor environments, such as the Northwest European climate, where the adhesive is exposed to fluctuating temperatures and humidity, and where good adhesion must remain guaranteed for an extended period. A tensile strength between 1 and 2 N / m² offers a suitable balance between adhesion and the necessary flexibility for artificial grass installations, ensuring that the adhesive withstands daily loads without premature damage or loss of adhesion. In a further formulation, the composition exhibits a curing rate of 1 mm to 5 mm after 24 hours at 23°C and 50% relative humidity. The curing rate of the adhesive is a property that indicates how quickly the adhesive fully hardens after application. This rate influences workability and the speed with which the bonded surfaces can be effectively loaded or put into use.In this case, with a curing speed between 1mm and 5mm after 24 hours, the adhesive is able to cure sufficiently to ensure adhesion, but at the same time offers sufficient time for adjustments and positioning of the artificial grass during application. The curing speed is highly dependent on environmental factors such as temperature and humidity. At a temperature of 23°C and a relative humidity of 50%, the adhesive is optimized for use in temperature fluctuations typical of a temperate climate, such as in Northwest Europe. Relative humidity plays a crucial role in the curing reaction, especially when the adhesive uses moisture to promote the crosslinking or polymerization of the chemical compounds used. An ideal curing speed means that the adhesive cures quickly enough to effectively secure the artificial grass mat, while sufficient time remains to make corrections or adjust the artificial grass before it fully hardens.In a second aspect, the present invention concerns the use of the composition as described above. The composition includes, among others, prepolymers, stabilizers, fillers such as chalk for improved water resistance, plasticizers that promote flexibility and workability, adhesion promoters to guarantee strong adhesion to various substrates, and catalysts to optimize the curing rate. Furthermore, the composition exhibits specific physico-chemical properties, including a Shore A-35 hardness of 10 to 50, a tensile strength of 1 N / m² to 2 N / m², and a curing rate of 1 mm to 5 mm after 24 hours under standard conditions. BE2025 / 5077 14 This composition has been specially developed for use in outdoor environments and is suitable for use in a Northwest European climate. The combination of carefully selected components makes the adhesive weather-resistant and durable, while the adhesion is maintained for a long time, even under challenging conditions5 such as fluctuating temperatures and humidity.The use of this composition is ideal for bonding artificial grass to various substrates, where both flexibility and strength of the bond are necessary. In one application form, the composition is used for bonding artificial grass to a substrate and / or for repairing artificial grass seams. When bonding artificial grass to a substrate, a strong, durable bond is essential to ensure that the artificial grass remains stable in place, even under heavy loads such as foot traffic, sports activities, or weather influences. The composition offers bonding properties suitable for various types of substrates, such as concrete, asphalt, or geotextile, and remains effective under varying climatic conditions, including humidity and temperature fluctuations. Thanks to the flexibility of the adhesive, it can accommodate the natural movement of the substrate and the artificial grass without the bond failing.20 When bonding artificial grass to a substrate, the application focuses on creating a strong, permanent bond between the artificial grass and the underlying layer. This use requires a composition that can withstand prolonged loading from foot traffic, weather influences such as rain and temperature fluctuations, and the natural movements of the substrate. Furthermore, the adhesion must remain consistent over a large surface area without failing to guarantee the stability of the artificial grass. Here, the water resistance and durability of the adhesive play an important role, as does the flexibility to accommodate movements or expansion.30 In addition, the composition is suitable for repairing artificial grass seams. Seams often form a weak point in artificial grass installations and can come loose under load or due to wear, which affects both the aesthetics and the functionality of the artificial grass.Due to the high tensile strength and optimal curing speed35 of the composition, it is possible to quickly and effectively repair damaged seams, so that the artificial grass regains its original strength and appearance BE2025 / 5077 15. The use-based flexibility of the composition makes it suitable for both small repairs and large-scale applications, where the adhesive adapts to the unique requirements of the situation in question. As a result, the composition contributes to a longer service life and better performance of artificial grass installations.5 When repairing artificial grass seams, the application is more localized and focused on repairing damaged or loosened seams between strips of artificial grass. This use places different demands on the composition. The adhesive must offer a fast and reliable bond that is resistant to mechanical stress on the seams, such as stretching, shrinkage, or heavy loading. A shorter curing speed This can be important in this regard, because repairs often need to be carried out quickly without prolonged downtime of the artificial grass surface.Moreover, the composition must be flexible enough to accommodate movement in the seams without tearing, while aesthetically connecting seamlessly to the existing artificial grass.15 In one design form, the composition can be used for various applications, including the construction of sports fields, gardens, landscaping applications, and interior cladding. For sports fields, where the artificial grass is subjected to heavy loads from foot traffic and sports activities, the composition20 must provide a strong, durable bond that is resistant to mechanical stress and wear. The weather resistance of the composition is essential here, as sports fields are often located outdoors and are exposed to rain, sun, and temperature fluctuations.25 For gardens and landscaping applications, which are generally subjected to less heavy loads, aesthetics also plays an important role alongside durability. The composition must ensure that the artificial grass is installed neatly and tightly, without visible seams or loose edges.At the same time, the adhesion must be flexible enough to accommodate natural movements of the substrate, such as slight shifts caused by moisture or plant growth. For interior covering applications, such as artificial grass in decorative settings or functional indoor spaces, other properties are important. Here, the composition must not only provide strong adhesion but also meet additional requirements, such as low emissions of volatile organic compounds (VOCs), to ensure indoor air quality. Additionally, the ease of application and removal can play a role, as interior applications often require greater flexibility in installation and reuse. The versatility of the composition makes it possible to guarantee optimal adhesion and functionality in all these applications, combining the specific properties of the artificial grass and the substrate with the requirements of the environment.In one aspect, the present invention concerns a kit comprising a composition as described above and at least one element selected from the group of 10—an adhesive comb, masking tape, seam tape, a marking tool—one or more artificial grass mats. This kit offers an all-in-one solution for the professional and efficient installation or repair of artificial grass in various applications, such as sports fields, gardens, landscaping applications, and interior cladding. Through the combination of the high-quality adhesive composition with 15 additional tools, the installation process is simplified, while the quality and durability of the bond are guaranteed. The composition forms the core of the sealant and offers the necessary adhesion properties, water resistance, and flexibility, suitable for both dry and slightly damp substrates. The additional elements in the sealant each play a specific role in the installation process. The adhesive comb ensures an even distribution of the adhesive over the substrate, which is essential for consistent adhesion.Masking tape can be used to delineate areas and prevent glue bleed-through, which is especially important for precision work or decorative applications.25 Seam tape reinforces the connection between different strips of artificial grass and increases the strength of the seams, making the installation resistant to heavy mechanical stress. The marking tool is useful when installing sports fields or other functional surfaces where precise markings are essential. This tool makes it easy to apply outlines or patterns, which contributes to a professional and aesthetically pleasing finish. The kit can also include one or more artificial grass mats, so that a complete installation is possible without the need for separate purchases. Optionally, the kit can be supplemented with other elements, such as gloves for safe working, a spatula for applying adhesive in hard-to-reach corners, a finishing roller to firmly press down the artificial grass, or a cleaning agent to remove excess adhesive.These additional components make the kit particularly suitable for both professional installers and DIYers, with an emphasis on ease of use, reliability and a high-quality end result. The versatility of the kit makes it possible to install artificial grass efficiently and durably on various surfaces and in diverse situations. 10 In what follows, the invention is described by means of non-limiting examples that illustrate the invention, and which are not intended or should not be interpreted to limit the scope of the invention. EXAMPLES15 EXAMPLE 1: An artificial grass adhesive was produced as follows with a composition as in Table 1. 20 Table 1. Composition of artificial grass adhesive Ingredient Amount Aliphatic silane-terminated polyurethane 16.2 wt% Plasticizer (diisodecyl phthalate) 18.45 wt% Crosslinker (vinyl trimethoxysilane) 3.94 wt% Chalk dust (green, black, yellow powder) 60.92 wt% Adhesion promoter (aminosilane-based) 0.74 wt% Catalyst (dioctyl tin oxide) 0.003 wt% Stabilizer (triazine) 1.77 wt% The artificial grass adhesive was tested on the parameters as shown in Table 2. Table 2. Mechanical parameters composition 125 Parameter Result Shore A hardhead [ISO 868] 40 Tensile strength [ISO 37] 1.4 N / mm² BE 2025 / 5077 18 Curing rate at 23°C and 50% RH 2-3 mm, after 24 h Peel strength after aging [EN 13744] 100 N / 100 mm The artificial grass adhesive from Table 1 was compared with artificial grass adhesives with another composition to evaluate the performance of the present invention. These compositions are included in Table 3. 5 Table 3. Alternative compositions Ingredient Composition 2 (wt%) Composition 3 (wt%) aliphatic silane-terminated polyurethane 14 18.5 Plasticizer (diisodecyl phthalate) 20.15 Crosslinker (vinyltrimethoxysilane) 35 Chalk dust (green, black, yellow powder) 62.58 Adhesion promoter (aminosilane-based) 0.51 Catalyst (dioctyltin oxide) 0.00 30.003 Stabilizer (triazine) 0.52.5 A composition with other ingredients was also prepared according to Table 4. Table 4.Alternative composition10 Ingredient Composition4(wt%) Silane-modified polymer (MS polymer) 18 Plasticizer (trioctyltrimellitate)17.5 Crosslinker (methacrylsilane)4 Bulking agent (calcium sulfate)58.2 Adhesion promoter (glycidyloxypropylsilane) 1.2 Catalyst (dibutyltin dilaurate)0.1 BE2025 / 5077 19 UV stabilizer (HALS)1 Compositions1 (present invention),2,3 and4 (alternative compositions) were evaluated under identical test conditions for mechanical and aging parameters. The results are shown in Table 5. 5 Table 5. Comparison of performance of artificial grass adhesives Parameter 1 2 3 4 Shore A hardhead [ISO 868] 4 0 3 5 4 2 3 8 Tensile strength [ISO 37] 1.4 N / mm² 1.0 N / mm² 1.2 N / mm² 1.1 N / mm² Curing rate at 23° C and 50% RH 2-3 mm after 24 h 1 mm after 24 h 3 mm after 24 h 3 mm after 24 h Peel strength after aging [EN 13 744] 100 N / 100 mm 70 N / 100 mm 90 N / 100 mm 85 N / 100 mm The test results show that the composition in Table 1 offers superior properties compared to compositions 2 and 3.Thus, the higher amount of aliphatic silane-terminated polyurethane, in combination with the balanced distribution of plasticizers and crosslinking, provides an optimal balance between elasticity and rigidity, which translates into higher tensile strength and peel strength after aging. With composition 2, it was noted that the lower concentration of polyurethanes and crosslinker resulted in a decrease in hardness and tensile strength, while the adhesion was less consistent under prolonged exposure to moisture and temperature fluctuations. Composition B, on the other hand, achieved better Shore A hardness and curing speed, but suffered from reduced tensile strength and lower peel strength after aging, likely due to an unbalanced distribution of the plasticizer and stabilizer. The results emphasize that the composition of the artificial grass adhesive in Table 1 not only offers robust mechanical performance but also improved resistance to aging factors, which contributes to a longer service life of artificial grass installations.25 The composition with silane-modified polymer in combination with calcium sulfate powder (compositions 4) shows an acceptable balance of performance, but remains inferior to the composition in Table 1. Composition 4 resulted in slower curing speeds and lower tensile strength, due to the choice of a less reactive plasticizer and lower crosslinker concentration. The artificial grass adhesive from Table 1, based on aliphatic silane-terminated polyurethane 5 and chalk dust as filler, showed a clearly better combination of curing speed, tensile strength and aging resistance. This makes it suitable for demanding applications in diverse climatic conditions. BE2025 / 5077.