EP4163439A1 - Kunstrasenfüllung und kunstrasen - Google Patents

Kunstrasenfüllung und kunstrasen Download PDF

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Publication number
EP4163439A1
EP4163439A1 EP22207803.2A EP22207803A EP4163439A1 EP 4163439 A1 EP4163439 A1 EP 4163439A1 EP 22207803 A EP22207803 A EP 22207803A EP 4163439 A1 EP4163439 A1 EP 4163439A1
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EP
European Patent Office
Prior art keywords
particles
coating
turf
artificial turf
infill
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP22207803.2A
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English (en)
French (fr)
Inventor
Stephan Sick
Ivo LOHR
Stefan HALLY
Zdenka Finder
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
11i Consulting GmbH
Murfitts Industries Ltd
Original Assignee
11i Consulting GmbH
Murfitts Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 11i Consulting GmbH, Murfitts Industries Ltd filed Critical 11i Consulting GmbH
Priority to EP22207803.2A priority Critical patent/EP4163439A1/de
Publication of EP4163439A1 publication Critical patent/EP4163439A1/de
Withdrawn legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C13/00—Pavings or foundations specially adapted for playgrounds or sports grounds; Drainage, irrigation or heating of sports grounds
    • E01C13/08—Surfaces simulating grass ; Grass-grown sports grounds

Definitions

  • the invention relates to artificial turf infill and an artificial turf with artificial turf infill.
  • Artificial turf or artificial grass is a surface that is made up of fibers and is used to replace grass.
  • the structure of the artificial turf is designed such that the artificial turf has an appearance that resembles grass.
  • Artificial turf is typically used as a surface for sports such as soccer, American football, rugby, tennis and golf, or for playing fields or exercise fields. Furthermore, artificial turf is frequently used for landscaping applications.
  • Artificial turf may be manufactured using techniques for manufacturing carpets. For example, artificial turf fibers, which have the appearance of grass blades, may be tufted or attached to a backing. Oftentimes, artificial turf infill is placed between the artificial turf fibers.
  • Artificial turf infill is a granular material that covers the bottom portion of the artificial turf fibers.
  • the use of artificial turf infill may have a number of advantages. For example, artificial turf infill may help the artificial turf fibers stand up straight. Artificial turf infill may also absorb impact from walking or running and provide an experience similar to being on real turf. The artificial turf infill may also help keep the artificial turf carpet flat and in place by weighing it down.
  • rubber granulate or recycled (e.g. from car tires) rubber granulate is still most commonly used as artificial turf infill.
  • the most commonly used rubber are styrene-butadiene rubber (SBR) or ethylene propylene diene monomer (EPDM), all of which can be generated from recycled rubber (post-consumer-waste or post-industrial-waste) or virgin material.
  • SBR styrene-butadiene rubber
  • EPDM ethylene propylene diene monomer
  • Recycled rubbers are cost effective products as they are derived from existing products that have reached the end of their service life.
  • the invention provides for an improved turf infill and an artificial turf with the improved turf infill.
  • the problem is solved by the features as specified in the independent claims.
  • Embodiments of the invention are given in the dependent claims.
  • the embodiments and examples described herein can freely be combined with each other unless they are mutually exclusive.
  • the invention provides for a turf infill comprising a mixture of cork particles, wherein the cork particles are coated with a polymer and/or resin component, and rubber particles, wherein the rubber particles are coated with a polymer and/or resin component.
  • the particles of cork and rubber may be of any suitable shape, including granules, gravel, grains and combinations thereof, and in various dimensions thereof.
  • the coating may be applied to the cork particles and rubber particles using any suitable method, and such methods are well known in the art.
  • the cork particles may be coated, e.g. in a flow reactor or batch reactor, separately from the rubber particles or both (rubber particles and cork particles) may be coated simultaneously, e.g. in the same flow reactor or batch reactor. Methods for coating the particles are disclosed for example in WO 2017/153261 , which is hereby incorporated in its entirety by reference herein.
  • polyurethane PU
  • PVB polyvinyl butyral
  • acrylic resin acrylic resin
  • methacrylates methacrylates
  • methyl acrylates methacrylates
  • cork particles as part of the mixture of the inventive turf infill may be beneficial, as cork is a renewable raw material derived from the bark of the cork oak (Quercus suber) from sustainably managed sources, and the particles can also be recycled from leftover material, e.g. from bottle cork production.
  • cork is not known to have any environmental toxicity, has insulating properties with low heat absorption when exposed to sunlight and has elastic features.
  • cork particles as part of the mixture of the inventive turf infill may be beneficial, even though the U.V. resistance and the mechanical stability/resistance are limited.
  • the coating of the cork particles may be beneficial, as the coating may weigh down the relatively light cork particles. This can reduce the tendency of cork to float away during heavy rainfall or be blown away by wind and may reduce the unmixing of particles of different weight.
  • the coating can comprise one or more layers. The layers can have the same or different thickness. The polymer and/or resin component of the layers of the coating may be the same or different.
  • coating may have the effect that coated cork particles cling together or are honed by friction during particle movement and the abrasion and wear is thus reduced, and the mechanical stability may be increased.
  • the coating of the known rubber particles may be beneficial, as the coating may prevent the possibly health-affecting substances to be released from the rubber particles.
  • rubber particles recycled even from car tires, e.g. in the shape of granules can be used for the inventive infill material.
  • the coating can comprise one or more layers.
  • the layers can have the same or different thickness.
  • the polymer and/or resin component of the layers of the coating may be the same or different.
  • cork particles and rubber particles may be beneficial in many aspects, as both cork particles and rubber particles can be recycled from previously manufactured materials, e.g. rubber particles from car tires and cork particles from e.g. leftover material from bottle cork production.
  • cork is a renewable raw material.
  • the heating up of the artificial turf to high temperatures i.e., to temperatures well above the ambient temperature
  • the heating up of rubber particles may be reduced due to the insulating properties of cork particles.
  • the coating of the cork particles and the rubber particles which may, e.g., have a higher coefficient of friction than rubber or cork and/or may be slightly sticky, may slow the segregation (unmixing) over time due to different weights or sizes.
  • the weight percentage ratio of the cork particles to the rubber particles is between 1 : 4 and 1 : 8, in particular between 1 : 5.5 and 1 : 6.5.
  • the weight percentage ratio can be chosen to be between 1 : 4 and 1 : 8.
  • This weight percentage ratio range is beneficial as it may provide that the size and the surface areas of both the cork and rubber particles is within the same range, thus the friction resistance between the particles, e.g. cork particles and rubber particles, is basically homogenous.
  • the weight percentage ratio can be chosen to be between 1 : 5.5 and 1 : 6.5. Due to this optimized weight percentage ration, it may also be possible to achieve that the optical perception of the particles is homogeneous.
  • the polymer and/or resin component of the coating of the cork particles and/or rubber particles is polyurethane (PU).
  • a polyurethane coating may be beneficial as fully reacted polyurethane polymer is considered to be chemically inert and thus environmental friendly and may be produced as a hard, abrasion-resistant, and durable coating, which may seal the rubber granule.
  • the polymer and/or resin component of the coating of the cork particles and/or rubber particles is polyvinyl butyral (PVB).
  • PVB is a resin, which can be prepared from polyvinyl alcohol by reaction with butyraldehyde, and can be acquired from remnants during production of laminated glass or can be recycled from laminated glass. PVB may be used as a protective layer around the particles. In addition, PVB has good adhesion to rubber and cork, may be sticky, and is tough and flexible.
  • the coating of the cork particles comprises fillers, in particular barium sulphate (barite), calcium carbonate (chalk), talc, quartz silica, other silicates, other oxides (such as iron oxides), hydro oxides, hollow glass spheres, organic fillers or a combination thereof.
  • fillers in particular barium sulphate (barite), calcium carbonate (chalk), talc, quartz silica, other silicates, other oxides (such as iron oxides), hydro oxides, hollow glass spheres, organic fillers or a combination thereof.
  • fillers can be advantageous, as the fillers are able to increase the weight of the coating and may thus increase the overall poured density of the coated cork particles. Thus, as the weight of the coated particles increases, the risk of coated cork floating away during heavy rainfall or being blown away by strong wind is further reduced.
  • the coating may comprise between 0.1 wt.% to 60 wt.% of fillers.
  • the coating of the cork particles comprises barium sulphate (barite) and/or calcium carbonate (chalk) as fillers, to increase the total weight of the artificial turf infill.
  • barite barium sulphate
  • chalk calcium carbonate
  • Barium sulphate (barite) and calcium carbonate (chalk) are particular advantageous, as they have a high density, e.g. calcium carbonate has a density of 2.7 g/cm 3 and barium sulphate has a density between 4.0 and 4.5 g/cm 3 , are relatively cheap materials and may be used to provide a dense coating.
  • the coating of the cork particles and/or rubber particles comprises particles selected from the group consisting of colored pigments, copper(II) sulfate particles, silver particles, chitosan particles or mixtures thereof.
  • the colored pigments may be inorganic, such as, e.g., iron oxide pigments, chromium oxide pigments and/or cobalt oxide pigments, or organic pigments. Further, the colored pigments may be infrared-reflective pigments, which are beneficial due to their ability to reflect infrared light. This may reduce the heating of the artificial turf infill. Further, as the infrared-reflective colored pigments may be contained solely in the applied coating, the costs for the comparably expensive and precious pigments, being merely on the surface of the cork particles and/or rubber particles, is reduced.
  • Copper(II) sulfate particles and/or chrome particles and/or iron oxide particles may be further beneficial due to their color, relatively low manufacturing costs and/or antibacterial properties.
  • Other antibacterial components that may be used are silver and/or chitosan particles, both of which have natural antibacterial properties.
  • the overall layer thickness of the coating of the cork particles and/or rubber particles is between 0.1 ⁇ m and 1 mm, or between 0.5 ⁇ m to 750 ⁇ m, or between10 ⁇ m to 150 ⁇ m.
  • the coating of the cork particles and/or rubber particles may each comprise one or more (sub-)layers.
  • the (sub-)layers may have the same or different thicknesses, however, the sum of the individual layer thicknesses is between 0.1 ⁇ m and 1 mm.
  • the overall layer thickness of the coating of the cork particles and/or rubber particles is between 10 ⁇ m and 150 ⁇ m.
  • the particles can be coated with one layer or with more layers. To increase the likelihood that that the particles are fully encapsulated and thus no possibly health-affecting substances may be released, it may be beneficial to coat the particles two or more times.
  • the size of the coated cork particles is between any one of the following: 0.03 mm and 3.5 mm, and 0.3 mm and 2.5 mm; and the size of the coated rubber particles is between any one of the following: 0.03 mm and 3.5 mm, and 0.3 mm and 2.5 mm
  • This configuration allows for a well-adjusted particle size distribution for artificial turf. Furthermore, the (natural) particle size distribution within each range allows the particles to be packed more densely.
  • the turf infill further comprises microporous zeolite mineral particles.
  • the microporous zeolite mineral particles have pores that form openings on the outer surface of the microporous zeolite mineral particles.
  • the use of the microporous zeolite mineral as an infill material is advantageous, as the particles are able to regulate the presence of water and may thus provide for a cooling effect of the surface of the artificial turf. Hence, an increased playing comfort can be reached when the outside temperatures are high.
  • the microporous zeolite mineral particle may be selected from the group consisting of chabazite, erionite, mordenite, clinoptilolite, faujasite, phillipsite, zeolite A, zeolite L, zeolite Y, zeolite X and ZSM-5.
  • the zeolite used may thus be a zeolite that can be natural or obtained by synthesis.
  • a microporous zeolite with a Mohs hardness above 3 and/or a strong absorbent power and/or a color that approximately resembles one of the well-known surface colors (e.g., red, brown, green), may preferably be used.
  • the most preferred microporous zeolite mineral may be of the chabazite and/or clinoptinolite and/or mordenite type.
  • the particle size of the microporous zeolite mineral particles is between any one of the following: 0.5 mm and 3.5 mm and 1.0 mm and 2.5 mm, and the weight percentage ratio of the microporous zeolite mineral particles to the cork particles and the rubber particles is between 2 : 7 and 4 : 7, in particular between 2.5 : 7 and 3.5 : 7.
  • microporous zeolite mineral particles it may be envisaged that the outer surface of at least some microporous zeolite mineral particles is partly covered with a polyurethane coating.
  • a polyurethane coating it may be feasible that 75 % to 99 % of the outer surface of a microporous zeolite mineral particle is partly covered with a polyurethane coating.
  • the partial covering is applied on each side of each microporous zeolite mineral particle, but that there are gaps (holes) in the covering enclosing the particles.
  • the partial coating is advantageous, since water can be absorbed and/or released by the microporous zeolite mineral particles through the pores contained in its surface areas, which are not covered by the polyurethane coating.
  • the microporous zeolite mineral particles are partly coated with the polyurethane coating, natural occurrence of abrasion and wear of the microporous zeolite mineral during use may be reduced, since the polyurethane coating may provide for a harder and thus protective surface compared to uncoated microporous zeolite mineral particles.
  • the Mohs hardness of polyurethane coating can be chosen to be higher or much higher than the Mohs hardness of the microporous zeolite mineral particles. It may be thus beneficial that the Mohs hardness of the polyurethane coating is at least one Mohs unit higher than the Mohs hardness of the selected microporous zeolite mineral particles.
  • the gaps in the coating of the inventive infill material may result during the manufacture of the infill material, as during the mixing, e.g. in a flow reactor or a batch reactor or a tumbler, the microporous zeolite mineral particles and a liquid polyurethane reaction mixture are mixed and while they are being mixed a solidification reaction is initiated.
  • the microporous zeolite mineral particles physically touch and interact with each other, thereby causing collision defects (e.g. gaps) in the coating and partly leaving the surface of the microporous zeolite particles uncovered.
  • collision defects e.g. gaps
  • the polyurethane coating extends over some of the pores forming respective covers of the pore openings, wherein the polyurethane coating coats a portion of the inner surface of the covered pores in the region of the cover.
  • the coating may penetrate a slight distance, for example between 0.2 ⁇ m and 500 ⁇ m, preferably between 1 and 150 ⁇ m and most preferred between 10 ⁇ m and 100 ⁇ m into the surface pores and thus may interfere with the pores in a form-locking manner.
  • the hold of the coating on the microporous zeolite mineral particles may be increased and at the same time the overall stability and hardness of the microporous zeolite mineral particles may be increased.
  • the infill material is preferably produced by mixing the microporous zeolite mineral particles with a liquid polyurethane reaction mixture and initializing the solidification reaction during the mixing, the microporous zeolite mineral particles have the same amount of their outer surface covered by the coating relative to the total outer surface. Substantially the same amount means that the outer surface of each of the partly coated microporous zeolite mineral particle is coated between 20 % and 99 %, preferably between 50 % to 98 % or between 70% to 99 %, with the polyurethane coating. Further, since the outer surface of each of the partly coated microporous zeolite mineral particle is - with the exception of the gaps - essentially fully coated, fine dusts may be bound.
  • the polyurethane coating of the microporous zeolite mineral particles may be based on a liquid polyurethane reaction mixture, which may be a dispersion or solution, comprising
  • liquid polyurethane reaction mixture may be advantageous, because it is a reaction mixture that can be solidified or cured (e.g., by cross-linking) under heat and/or by adding water. Therefore, the zeolite mineral particles and the liquid polyurethane reaction mixture may be mixed and solidified simultaneously in a batch reactor, a continuous reactor or a tumbler, resulting in the partial polyurethane coating or the coating with gaps. Further, the resulting polyurethane coating may be a waterborne polyurethane coating.
  • the polyurethane coating of the microporous zeolite mineral particles may be based on a liquid polyurethane reaction mixture comprising:
  • liquid polyurethane reaction mixture may be advantageous, because it is a reaction mixture that can be solidified or cured (e.g., by cross-linking) by adding a catalyst, e.g. a secondary amine catalyst, a tertiary amine catalyst, such as triethylenediamine or e.g.1,4-Diazabicyclo[2.2.2]octane, cyclic amines such as 1,8-Diazabicyclo(5.4.0)undec-7-ene (DBU) or a metal organic catalyst, and water. Therefore, the zeolite mineral particles and the liquid polyurethane reaction mixture may be mixed and solidified simultaneously in a controlled manner in a batch or continuous reactor, resulting in the partial polyurethane coating or the coating with holes.
  • a catalyst e.g. a secondary amine catalyst, a tertiary amine catalyst, such as triethylenediamine or e.g.1,4-Diazabicyclo[2.2.2]octane, cycl
  • the polyurethane coating of the microporous zeolite mineral particles may further comprise a rheology additive that is adapted to induce a thixotropic flow behavior in one of the above described liquid polyurethane reaction mixtures.
  • Adding a rheology additive with thixotropic capabilities may be advantageous in order to achieve a controllable viscosity-increasing thixotropic flow behavior of the (e.g., liquid or fluid) polyurethane coating while applying it, e.g. by mixing the liquid polyurethane reaction mixture with the microporous zeolite mineral particles, to the surface of the microporous zeolite mineral particles in order to control or reduce the depth of penetration of the liquid polyurethane reaction mixture into the pores contained in the surfaces of the microporous zeolite mineral particles.
  • the (e.g., liquid or fluid) polyurethane coating e.g., liquid or fluid) polyurethane coating while applying it, e.g. by mixing the liquid polyurethane reaction mixture with the microporous zeolite mineral particles, to the surface of the microporous zeolite mineral particles in order to control or reduce the depth of penetration of the liquid polyurethane reaction mixture into the pores contained in the surfaces
  • Suitable rheology additives may be e.g. fumed silica (e.g. synthetic, hydrophobic, amorphous silica), also known as pyrogenic silica, made from flame pyrolysis of silicon tetrachloride or from quartz sand vaporized in a 3000 °C electric arc, hydrophobic fumed silica, bentonite, acrylates or a combination of the aforementioned additives.
  • fumed silica e.g. synthetic, hydrophobic, amorphous silica
  • pyrogenic silica made from flame pyrolysis of silicon tetrachloride or from quartz sand vaporized in a 3000 °C electric arc
  • hydrophobic fumed silica bentonite
  • acrylates or a combination of the aforementioned additives.
  • microporous zeolite mineral particles are charged with a salt solution.
  • Microporous zeolite mineral particles charged with salt ions may allow for an increased water adsorption and/or water desorption effect.
  • microporous zeolite mineral particles allows a synergy to operate between the following properties: the adsorption, absorption and release of water of the microporous zeolite mineral particles, and the ability to lower the freezing temperature of the water.
  • the microporous mineral particle in the presence of humidity, is in a position to adsorb and/or absorb this humidity in order to prevent, on the one hand, the surface formation of a layer of slippery frost, in the case of a negative temperature, and on the other hand, the agglomeration of the turf infills.
  • the coated rubber and coated cork particles in combination with the microporous mineral particles, which are loaded with salt and water may further allow a further increased release of the water and the maintenance of relative humidity at the surface of said turf.
  • the microporous mineral loaded with salt adsorbs and/or absorbs the water and then continuously releases those water molecules by desorption. This continuous release of the water by the microporous mineral avoids rapid evaporation of the water after watering the surface and allows a lower temperature to be maintained at the level of the field surface compared to the ambient temperature. Said microporous mineral loaded with salt thus further reduces the amount of watering usually necessary to refresh a turf surface.
  • the invention relates to turf infill, as described above, for an artificial turf comprising an artificial turf carpet, wherein the artificial turf carpet comprises multiple artificial turf fiber tufts, and wherein the turf infill is configured for scattering between the multiple artificial turf fiber tufts of the artificial turf.
  • the invention relates to an artificial turf, wherein the artificial turf comprises an artificial turf carpet, wherein the artificial turf carpet comprises multiple artificial turf fiber tufts, and a turf infill, as described above, which is scattered between the multiple artificial turf fiber tufts.
  • an artificial turf 600 with artificial turf carpet 500 is shown.
  • the artificial turf carpet 500 contains a backing 502.
  • the artificial turf carpet 500 is a tufted artificial turf carpet, which is formed by artificial turf fiber tufts 504 that are tufted into the backing 502.
  • the artificial turf fiber tufts 504 are tufted in rows. There is row spacing 506 between adjacent rows of tufts.
  • the artificial turf fiber tufts 504 also extend a distance above the backing 502. The distance that the fibers 504 extend above the backing 502 is the pile height 508.
  • the artificial turf carpet 500 has been installed by placing or attaching it to the ground 510 or a floor.
  • the turf infill 100 has been spread out on the surface and distributed between the artificial turf fiber tufts 504.
  • the turf infill 100 comprises coated cork particles (here granules) and coated rubber particles (here granules).
  • Fig. 2 a detail from Fig. 1 is shown to visualize the turf infill comprising cork particles 200, wherein the cork particles 200 are coated with a polymer and/or resin component, and rubber particles 300, wherein the rubber particles 300 are coated with a polymer and/or resin component.
  • the cork granules 200 and the rubber granules 300 both have a coating, which may, e.g., have a higher coefficient of friction than rubber or cork by themselves or may be slightly sticky.
  • the coating may slow the segregation (unmixing) over time due to different weights or sizes of the different granules.
  • the weight percentage ratio can be chosen to be between 1 : 4 and 1 : 8.
  • the coating 202 of the cork particles 200 is manufactured from a polymer and/or resin component, which may be polyurethane (PU) or polyvinyl butyral (PVB).
  • the coating 302 of the rubber particles 300 is also manufactured from a polymer and/or resin component, which may be polyurethane (PU) or polyvinyl butyral (PVB).
  • Fig. 4 depicts the coated cork particles 200 and the coated rubber particles 300 of the turf infill.
  • the coating 202 of the cork particles 200 comprises fillers, here barium sulphate particles 204 and calcium carbonate particles 205. It shall be understood, that it is also feasible that either only barium sulphate particles 204 or only calcium carbonate particles 205 may be used as fillers. The use of both described fillers can be advantageous, as these fillers are able to increase the weight of the coating 202 and may thus increase the overall poured density of the coated cork particles 200.
  • the coating 302 of the rubber particles 300 is comprised of two layers, an inner layer 302a and an outer layer 302b. The double-layer coating may prevent possibly health-affecting substances to be released from the rubber particles 300.
  • Fig. 5 depicts the turf infill 100 comprising microporous zeolite minerals 400, cork particles 200, wherein the cork particles 200 are coated with a polymer and/or resin component, and rubber particles 300, wherein the rubber particles 300 are coated with a polymer and/or resin component.
  • the microporous zeolite minerals 400 may be uncoated microporous zeolite minerals 400 or partially coated microporous zeolite minerals 400 as depicted in Figures 6 to 8 .
  • Fig. 6 shows a microporous zeolite mineral particle after it has been partially coated with a polyurethane coating 420 and may thus be used as part of an infill material. As can be seen, at least some parts of the surface of the coated microporous zeolite mineral particle 400 are not covered by the polyurethane coating 420. In Fig. 6 a dotted circle is also indicated, the schematic content of which is enlarged in Fig. 7 .
  • the microporous zeolite mineral particle 400 which contains pores 411, has been partially coated with a polyurethane coating 420.
  • the polyurethane coating 420 was formed by providing microporous zeolite mineral particles 400 and a liquid polyurethane reaction mixture in a batch reactor, tumbler or continuous reactor. Simultaneous mixing and initialization of the solidification reaction lead to the desired partial coating of the polyurethane coating 420 on the surface of the microporous zeolite mineral particle 400.
  • the partial coating results from microporous zeolite mineral particles 400 colliding while being mixed with the initialized liquid polyurethane reaction mixture.
  • the polyurethane coating 420 coats a portion of the inner surface of the microporous zeolite mineral particle 400 in the region of the cover.
  • the coating 420 may penetrate with a slight distance, for example between 0.2 ⁇ m and 500 ⁇ m, preferably between 1 and 150 ⁇ m and most preferred between 10 ⁇ m and 100 ⁇ m into the surface pores 411 and thus may interfere with the pores 411 in a form-locking manner.
  • the hold of the coating on the microporous zeolite mineral particle 400 may be increased and at the same time the overall stability and hardness of the microporous zeolite mineral particle 400 may be increased.
  • the partially coated microporous zeolite mineral particle 400 is preferably produced by mixing the microporous zeolite mineral particles with a liquid polyurethane reaction mixture and initializing the solidification reaction during the mixing, the microporous zeolite mineral particles have substantially the same amount of their outer surface covered by the coating relative to the total outer surface.
  • each microporous zeolite mineral particle is covered between 20 % and 99 %, preferably between 50 % to 98 % or between 70% to 99 %, with the polyurethane coating 420. Since the outer surface of each microporous zeolite mineral particle 400 is - with the exception of the gaps - essentially fully coated, fine dusts may be bound.
  • the polyurethane coating 420 may comprise a rheology additive. The rheology additive may be added in order to achieve thixotropic flow behavior of the liquid polyurethane reaction mixture during mixing of the liquid polyurethane reaction mixture with the microporous zeolite mineral particle 400.
  • Fig. 8 depicts a partly coated microporous zeolite mineral particle 400.
  • the microporous zeolite mineral particle 400 has pores 411 that form openings on the outer surface of the microporous zeolite mineral particles 400.
  • the outer surface of the microporous zeolite mineral particles 400 is partly coated with a polyurethane coating 420, wherein the coating extends over most of the pores 411, thereby forming respective covers of the openings.
  • the polyurethane coating 420 was formed by providing a plurality of microporous zeolite minerals particles 400 and a liquid polyurethane reaction mixture in a batch reactor, tumbler or continuous reactor.
  • Simultaneous mixing and initialization of the solidification reaction lead to the desired partial coating of the polyurethane coating 420 on the surface of the microporous zeolite mineral particle 400.
  • the partial coating results from collisions of microporous zeolite mineral particles 400 while being mixed with the initialized liquid polyurethane reaction mixture. Since the initialization of the solidification reaction takes place simultaneously, uncovered spaces (e.g., gaps or holes), created by collisions, remain on the surface of the microporous zeolite mineral particles. As indicated in Fig. 8 , it may be feasible that 75 % to 99 % of the outer surface of the microporous zeolite mineral particle is partly covered with a polyurethane coating 420.
  • embodiments of the invention comprise the following features:

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EP22207803.2A 2018-12-14 2018-12-14 Kunstrasenfüllung und kunstrasen Withdrawn EP4163439A1 (de)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4337283A (en) * 1980-09-11 1982-06-29 Haas Jr Frederick T Synthetic turf playing surface with resilient top-dressing
US20120258811A1 (en) * 2009-02-09 2012-10-11 Sapturf, Llc Synthetic turf having cooling layer
EP2749350A2 (de) * 2012-12-28 2014-07-02 Benoit Pintat Zusammensetzung, die zur Regulierung der Präsenz von Wasser auf einer Außenfläche dienen soll
KR20140112167A (ko) * 2013-03-13 2014-09-23 김동현 인조잔디 충진용 sebs 고무칩 제조방법 및 그 방법에 따른 sebs 고무칩
US20150308056A1 (en) * 2014-04-25 2015-10-29 Profile Products Llc Artificial turf field system
EP3216821A1 (de) * 2016-03-11 2017-09-13 Polytex Sportbeläge Produktions-GmbH Kunstrasenfüllung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4337283A (en) * 1980-09-11 1982-06-29 Haas Jr Frederick T Synthetic turf playing surface with resilient top-dressing
US20120258811A1 (en) * 2009-02-09 2012-10-11 Sapturf, Llc Synthetic turf having cooling layer
EP2749350A2 (de) * 2012-12-28 2014-07-02 Benoit Pintat Zusammensetzung, die zur Regulierung der Präsenz von Wasser auf einer Außenfläche dienen soll
KR20140112167A (ko) * 2013-03-13 2014-09-23 김동현 인조잔디 충진용 sebs 고무칩 제조방법 및 그 방법에 따른 sebs 고무칩
US20150308056A1 (en) * 2014-04-25 2015-10-29 Profile Products Llc Artificial turf field system
EP3216821A1 (de) * 2016-03-11 2017-09-13 Polytex Sportbeläge Produktions-GmbH Kunstrasenfüllung
WO2017153261A1 (en) 2016-03-11 2017-09-14 Polytex Sportbeläge Produktions-Gmbh Artificial turf infill and method for making it

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