JP2012219604A - Squeegee - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a squeegee which is used appropriately when forming an elastic pavement body using an elastic pavement material capable of forming a traveling road or facility having excellent thixotropy by applying thixotropy to the pavement material per se and properly performing surface processing using the pavement material.SOLUTION: An elastic pavement material contains a thixotropy application agent, an inorganic filler, an urethane polymer and a dispersant containing an amide compound and/or polyether/ester polyhydric carbonic acid. A squeegee is configured to stream the elastic pavement material on an underlying resin paving asphalt concrete. An edge face of the squeegee streaming the elastic pavement material is formed in a comb shape with a pitch width of 4.0 to 10.0 mm and a height of 2 to 6 mm, and the total weight including branches is settled within the range of 800 to 1500 g. Therefore, variation in viscosity with a temperature change is reduced and elastic pavement can be stably performed.

Description

  The present invention relates to a squeegee for use in forming an elastic pavement for paving the surface of a competition ground or track. More specifically, the present invention relates to a squeegee that can form an elastic pavement so that unevenness formed on the surface does not become uneven due to temperature changes caused by environmental changes.

2. Description of the Related Art Conventionally, it is known that the surface of an athletic competition ground or a runway such as jogging is formed of various polymer elastic pavement materials.
In particular, when the pavement is an outdoor facility, it is necessary to be all-weather, and recently, there is an increasing demand for competition facilities that are surface-treated with such all-weather pavement.

In forming these all-weather competition facilities, urethane elastic pavement materials have the advantage of being easy to install and have excellent properties and are widely used.
However, these polyurethane pavements have a problem that their surfaces are too smooth and glossy and difficult to play. Especially in the outdoors, there is a problem that sunlight is easily reflected and it is difficult to play, and the surface is too smooth and the slip falls easily during the game.

In order to solve such problems, conventionally, a method (topping finishing method) of applying a minute polyurethane chip or a minute rubber chip before urethane is cured is employed.
However, the facility or runway formed by this topping finish method develops a specific phenomenon of side deflection caused by the topping finish due to the topped urethane chip or rubber chip, and the athlete's ability cannot be fully demonstrated. I found out there was a problem.

In order to prevent the lateral blurring due to such a topping finish, it has been proposed to emboss the surface of a polyurethane having a thixotropic property using a roller.
For example, Japanese Patent No. 2810227 discloses a method of imparting thixotropy by finishing a urethane resin liquid into an embossed shape using a roller.
However, the elastic pavement made of urethane resin as described above also has room for further improvement because the urethane itself forming the runway or facility has no thixotropy.

Japanese Patent No. 2810227

  The present invention provides an elastic pavement using an elastic pavement material capable of forming a runway or facility having excellent thixotropy by imparting thixotropy to the pavement material itself and appropriately surface-treating using this pavement material. It aims at providing the squeegee used suitably when forming.

The squeegee of the present invention provides an elastic pavement material containing a thixotropic agent, an inorganic filler, a urethane prepolymer, and a dispersant containing an amide compound and / or a polyether ester type polyvalent carboxylic acid on ascon. Fluent squeegee,
The squeegee's elastic pavement edge surface is formed into a comb shape having a pitch width of 4.0 to 10.0 mm and a height of 2 to 6 mm, and the total weight including the branches is 800 to It is characterized by being in the range of 1500 g.

  ADVANTAGE OF THE INVENTION According to this invention, when paving a pavement material on the all-weather pavement surface of a stadium using urethane, a pavement material can be poured uniformly. In particular, the pavement material can be fluted without being relatively affected by the temperature. For example, by using the squeegee of the present invention, it is possible to form a highly uniform elastic pavement surface without being affected by temperature changes in summer and winter, etc. It is suitable as a surface finishing material and can form a uniform uneven surface with little light reflection, and the pavement surface formed in this way significantly reduces the possibility of slipping.

FIG. 1 is an example of a process diagram when forming an elastic pavement used in the present invention. FIG. 2 is a schematic diagram showing an example of paving an elastic paving material using the squeegee of the present invention. FIG. 3A is a view showing a state of the ridge formed at both ends of the squeegee when the elastic pavement is fluted with the squeegee of the present invention, and FIG. It is sectional drawing which shows typically the state which carried out. FIG. 4 is a cross-sectional view showing a cross section of a Wooler in which short hairs are implanted. FIG. 5 is a cross-sectional view showing a cross section of the sand-bone roller.

  Next, a method for forming an elastic pavement using the squeegee of the present invention will be specifically described with reference to the drawings.

  In the method of forming an elastic pavement using the squeegee of the present invention, a specific elastic pavement material is fluted using a squeegee 20, a woofer 30, and a sandbone roller 40 as shown in FIGS. Surface treatment. That is, a specific elastic pavement material is fluted by the squeegee 20, and the pavement material fluted by the squeegee is rolled on the short or medium wool roller 30 (Wooler transfer step), and the sandbone roller 40 is transferred. Then, the sand bone roller transfer step including the step of forming fine irregularities on the surface of the elastic pavement (first sand bone roller transfer step) is performed at least three times. The transfer direction of the sand-bone roller 40 is the transfer direction of the first sand-bone roller along the work traveling direction (in many cases, the direction of the road), and the second and third sand-bone rollers are Transfer is performed so as to be orthogonal to the transfer direction of the bone roller.

  As shown in FIG. 1, the elastic paving material preferably used in the present invention basically comprises a thixotropic agent, an inorganic filler, a urethane prepolymer, and a dispersant. Further, the elastic pavement material of the present invention usually contains a toner for coloring the pavement, a reaction catalyst for urethane, a dispersant for imparting elasticity to the pavement, a weathering stabilizer and the like.

In the present invention, the thixotropic agent has an average particle diameter of 30,000 nm or less, preferably 5 to 15,000 nm, and a specific surface area by the BET method of 100 m ² / g or more, preferably 150 to 410 m ² / g. Of particles. Examples of particles used as such a thixotropic agent include usually ultrafine silica, Al ₂ O ₃ -containing ultrafine silica, and TiO ₂ -containing ultrafine silica. These can be used alone or in combination. By using ultrafine powder with the average particle size and specific surface area as described above as a thixotropic agent, when stress is applied by spikes etc. in cooperation with polyurethane, the main material of paving materials The stress is relaxed, and a part of the stress is absorbed.

  Particles that are commercially available as such thixotropic agents can be used, and examples of such commercially available thixotropic agents include Aerosil (manufactured by Nippon Aerosil Co., Ltd.) and surface treatment. Heavy calcium carbonate powder, Carbosil (Carbosil Co., Ltd.), Hi-Seal (PPG Japan Co., Ltd.), Ultra Seal (Degussa Co., Ltd.), Carplex (Shionogi Pharmaceutical Co., Ltd.), Nip Seal (Nihon Silica) Kogyo Co., Ltd.). In particular, in the present invention, by using Aerosil # 200 or Aerosil # 380, a very excellent thixotropic property can be expressed, and a homogeneous pavement surface with predetermined irregularities can be formed.

Such thixotropic agent is usually used in an amount of 0.1 to 15 parts by weight, preferably 0.5 to 10 parts by weight, in 100 parts by weight of the solid content of the elastic pavement material of the present invention. The
In order to increase the effect of unevenness formed on the painted surface, the blending amount of the thixotropic agent may be increased. However, if the amount exceeds the upper limit of the specified amount, the characteristics of the paved surface will be deteriorated. There is a fear. Moreover, even if it mixes below the said minimum, the effect as a thixotropic agent is not expressed.

In addition to the thixotropic agent as a powder, the elastic pavement material of the present invention is blended with an inorganic filler having an average particle diameter of 0.5 to 20 μm, preferably 1 to 10 μm. . This inorganic filler is an active or inactive filler in the elastic pavement material of the present invention, and specifically, heavy calcium carbonate, talc, barium carbonate, zinc white and the like can be used. In addition, an inorganic fiber mainly composed of hydrous magnesium silicate as a thixotropic agent, for example, a natural fibrous clay mineral whose name is Sepiolite, can be used. More specifically, a product manufactured by Mizusawa Chemical Co., Ltd. Name Aid Plus, Sepio Japan Co., Ltd. trade name Mircon, and Omi Industry Co., Ltd. trade name Miracle can be suitably used. These inorganic fillers can be used alone or in combination. Among these, it is preferable to use heavy calcium carbonate.
In the present invention, surface-treated calcium bicarbonate can also be used as a thixotropic agent or filler.

In the present invention, the inorganic filler is used in an amount of 20 to 80 parts by weight, preferably 40 to 60 parts by weight, in 100 parts by weight of the elastic paving material.
Particularly in the present invention, the thixotropic agent and the inorganic filler are usually blended in a weight ratio within the range of 1:10 to 1:70, preferably 1:30 to 1:50. desirable. Thus, by adjusting the blending ratio of both, it is possible to form a high-speed runway with good pavement surface characteristics and a sense of stability.

  Further, the total amount of the thixotropic agent and the inorganic filler, which are powders, is usually in the range of 30 to 80 parts by weight, preferably 40 to 60 parts by weight with respect to 100 parts by weight of the urethane prepolymer. Used in quantity. The road formed from a urethane prepolymer containing a thixotropic agent and an inorganic filler and containing a specific dispersant has excellent thixotropic properties and elasticity, such as good record achievement. It is suitable as an elastic paved runway.

  The urethane prepolymer used in the present invention can be obtained, for example, by reacting an active hydrogen-containing compound such as polyols or carboxylic acid or dicarboxylic acid with an isocyanate group at the terminal composed of an excess of a polyisocyanate compound.

  The polyisocyanate compound used here is a compound having a plurality of isocyanate groups in the molecule, and a compound having a polyisocyanate group which is usually used in the present invention is not particularly limited. Examples of such polyisocyanate compounds include tolylene diisocyanate (TDI), a mixture of tolylene diisocyanate and polymethylene polyphenylene polyisocyanate, 4,4'-diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate, triphenylmethane triisocyanate. Mention may be made of isocyanate, xylene diisocyanate, hexamethylene diisocyanate and its modified norbornene diisocyanate, dicyclohexyl diisocyanate, isophorone diisocyanate. These can be used alone or in combination.

  In use, the urethane resin used in the present invention is a polyol such as polyether or polyester (a compound having an active hydrogen atom in the molecule and having a molecular weight of about 300 to 7000) and the polyol. A polyisocyanate compound having an excess of polyisocyanate groups is reacted to form a urethane prepolymer for use.

  Examples of polyethers used here include polyethylene alcohols such as diethylene glycol, polyethylene glycol, polypropylene glycol, glycerin, trimethylolpropane, pentaerythritol, sorbitol, and sucrose, as well as ethylenediamine, ethanolamine, and aromatic polyamine. Starting from polyhydric phenols such as amines such as phenolic resins and the like, ring-opening polymerization of alkylene oxide can be used.

  In addition, as a compound having an active hydrogen atom in the molecule, organic acids such as adipic acid, phthalic acid, sebacic acid, and dimer acid can be used, and ethylene glycol, propylene glycol, 1,3-butanediol, Butylene glycol, hexanetriol, and the like can also be used.

  In the present invention, a urethane prepolymer whose molecular terminal is an isocyanate group is used by using a polyisocyanate compound in excess of the hydroxyl value of the compound having active hydrogen in the molecule as described above. Usually, the polyisocyanate compound is used so that the hydroxyl value of the compound having active hydrogen in the molecule is 1 to 10 times, preferably 2 to 5 times. By using the urethane prepolymer having an isocyanate group at the terminal in this way, the pot life and viscosity can be adjusted within a range suitable for paving work.

  The molecular weight of the urethane prepolymer at this time is usually in the range of 1000 to 10,000, preferably 1500 to 5000, and the viscosity of the urethane prepolymer alone at 25 ° C. is usually 3 to 30 Pa · s, preferably It is in the range of 5 to 15 Pa · s and has good fluidity.

In the present invention, the urethane prepolymer as described above is usually blended in the range of 20 to 80 parts by weight, preferably 40 to 60 parts by weight, in 100 parts by weight of the pavement material.
In the present invention, an amide compound and / or a polyether ester type polyvalent carboxylic acid having a melting point in the range of 50 to 145 ° C. is further blended.

  The polyamide compound used in the present invention is a reaction product of carboxylic acid and polyamide, and has a melting point in the range of 50 to 145 ° C., preferably 70 to 100 ° C., and having a —CONH— structure in the molecule. It is. Carboxylic acids used in preparing this polyamide compound include aliphatic carboxylic acids, aromatic carboxylic acids, and polybasic carboxylic acids.

Examples of aliphatic carboxylic acids that can be used in the present invention include caproic acid, capric acid, pelargonic acid, undecyl acid, dodecanedicarboxylic acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, linoleic acid, Mention may be made of linolenic acid, 2-ethylhexylic acid and hydrogenated sunflower oil fatty acids.
Examples of the aromatic carboxylic acid include monovalent aromatic carboxylic acids such as benzoic acid, toluic acid, and naphthalic acid.

  Further, the carboxylic acid used in the present invention may be a polybasic carboxylic acid, and examples of such a polybasic carboxylic acid include dimer acid, succinic acid, azelanoic acid, glycanic acid, adipic acid. , Piperic acid, sebacic acid, dodecanedicarboxylic acid, phthalic acid, maleic acid, dodecanedioic acid. These can be used alone or in combination, and a part of the carboxylic acid group of the polybasic carboxylic acid can be used in combination with an amine compound.

Examples of amine compounds that react with the carboxylic acid include alcohol amines such as monomethanolamine, diethanolamine, isopropanolamine, and aminoethylethanolamine;
Monoamines such as butylamine, hexylamine, octylamine, laurylamine, stearylamine, 2-ethylhexylamine;
Methylenediamine, ethylenediamine, propylenediamine, 4,4-diaminobutane, trimethylenediamine, hexamethylenediamine, octamethylenediamine, 1.10-dodecamethylenediamine, 1,11-dodecamethylenediamine, diethylenetriamine, triethylenetetraamine, xylylene Polyamines such as amines, 4,4'-diaminodiphenylmethane, isophoronediamine;
Benzylamine and its derivatives;

An amide compound having a —NHCO— group in the molecule can be prepared by blending the carboxylic acid or dicarboxylic acid and the amine compound so that the amine compound becomes excessive and heating in a solvent.
The acid value of the polyamide thus obtained is usually in the range of 10 to 200, preferably 20 to 60, and the average molecular weight is usually in the range of 10,000 to 50,000.

Furthermore, the dispersant used in the present invention may contain a (meth) acrylic acid ester (co) polymer obtained by (co) polymerizing a (meth) acrylic acid compound.
The (meth) acrylic acid monomer used to prepare this (meth) acrylic acid ester (co) polymer is preferably an alkyl (meth) acrylate having an alkyl group having 2 to 18 carbon atoms. It is a polymer or copolymer having an ester as a main component, and this alkyl group may contain a functional group such as a hydroxyl group.

  As an example of a monomer that forms a polymer or copolymer having such a (meth) acrylic acid alkyl ester as a main component, a (meth) acrylic acid alkyl ester having an alkyl component having 2 to 18 carbon atoms is used alone. Or the polymer polymerized by combining can be mentioned. In addition, monomers other than (meth) acrylic acid monomers such as styrene may be copolymerized as long as the properties of the polymer are not impaired. The copolymerization amount of monomers other than the (meth) acrylic acid monomer is usually 30% by weight or less.

  The (meth) acrylic acid ester (co) polymer has an average molecular weight usually in the range of 1000 to 10,000, and a glass transition temperature of usually 20 ° C. or less, preferably in the range of 20 ° C. to −50 ° C. is there.

  When the dispersant contains a (meth) acrylic acid ester (co) polymer, the above-mentioned polyamide compound and (meth) acrylic acid ester (co) polymer as the dispersant are within the range of 60:40 to 90:10. It is desirable to use what is contained by weight ratio.

  Since the amide compound as described above is easily dissolved in xylene, polyalkylene glycol, and the like, in the present invention, the dispersant is used after being dissolved in a xylene / polypropylene glycol mixed solvent or the like.

  The elastic paving material used in the present invention is such an amide compound and / or a polyether ester type polyvalent carboxylic acid. An integrated product of an amide compound and an alkyl (meth) acrylate (co) polymer is commercially available as Disparon 3900 (manufactured by Enomoto Kasei Co., Ltd.).

  The polyether ester type polyvalent carboxylic acid used in the present invention is a nonionic surfactant having a plurality of ether bonds and ester bonds in one molecule, and an alkylene glycol such as ethylene glycol is converted into a polyether. The structure (—R—O—R—) is formed, and in many cases, the ester bond (—COO—) is present in the molecule or is molecularly sealed by an ester bond at the molecular end. And the polarity of this polyether polyester type | mold surfactant changes with the addition amount of alkylene glycol. This polyether polyester type activator can contain the above-mentioned amide bond, and can be regarded as a polyamide compound depending on the amount of amide bond (or compound). It can also be recognized as an ester type polyvalent carboxylic acid. Incidentally, for example, Disparon 3600N (manufactured by Enomoto Kasei Co., Ltd.) can be cited as one having a small amount of amide bond (or compound).

Moreover, in this invention, the heavy calcium carbonate surface-treated can also be used as a thixotropic agent.
In the present invention, if necessary, a toner, a liquid additive, a reaction catalyst for urethane prepolymer, a liquid polyamine, and a weathering stabilizer can be blended in addition to the above components.

  The toner used here is for coloring the elastic paving material, and specific examples include bengara, titanium oxide, carbon black, chromium oxide, cyanine blue, and cyanine green. These toners can be used in an amount of usually 2 to 10 parts by weight, preferably 4 to 6 parts by weight, per 100 parts by weight of the solid content in the elastic paving material of the present invention.

  The liquid additive is mainly a plasticizer, and examples thereof include dimethyl phthalate, diethyl phthalate, dibutyl phthalate, diheptyl phthalate, di-2-ethylhexyl phthalate, diisooctyl phthalate, di-phthalate Phthalates such as n-octyl, dinonyl phthalate, diisodecyl phthalate, ditridecyl phthalate, dibutylbenzyl phthalate, dicyclohexyl phthalate; dioctyl adipate, diisodecyl adipate, dioctyl azelate, dibutyl sebacate, dioctyl sebacate Aliphatic dibasic acid esters such as diethylene glycol dibezoate, dipentaerythritol, and hexaester pentylerythritol glycol esters; phosphate esters such as trioctyl phosphate; epoxy value soybean oil Butyl epoxy stearate, and epoxy-based plasticizers such as epoxy stearic octyl.

  Among these, it is preferable to use dibutyl phthalate, di-2-ethylhexyl phthalate, diisooctyl phthalate, dioctyl adipate, tricresyl phosphate, and the like. These can be used alone or in combination.

These liquid additives are usually used in an amount within the range of 0 to 10 parts by weight, preferably 3 to 7 parts by weight, per 100 parts by weight of the solid content in the elastic paving material used in the present invention. Can do. By using the amount as described above, the pavement formed from the elastic pavement material of the present invention has good elasticity without becoming hard.
As a curing agent component for reaction-curing the urethane prepolymer described above, methylenebis-o-chloroaniline (MBOCA), a condensate (including a mixture) of aniline and / or formalin with polypropylene glycol (PPG) , Preferably a molecular weight of 1000 to 10,000). In the present invention, the liquid polyamine is a compound containing methylenebis-o-chloroaniline, and this active hydrogen compound is usually 2 to 15 parts by weight in 100 parts by weight of the solid content in the elastic paving material of the present invention. , Preferably 4 to 10 parts by weight.

  The elastic pavement material used in the present invention contains a catalyst, and examples of the catalyst for reaction curing of the urethane prepolymer include tin compounds, lead octylate, triethylamine, and lead naphthenate. it can. These catalysts can be used in an amount usually in the range of 0.1 to 5 parts by weight, preferably 1 to 3 parts by weight in 100 parts by weight of the solid content in the elastic paving material of the present invention.

  Moreover, the weathering stabilizer is normally mix | blended with the elastic paving material used by this invention. Here, the weathering stabilizer is for preventing deterioration of the elastic pavement formed by using the elastic pavement material used in the present invention, and is usually an ultraviolet degradation inhibitor such as a benzotriazole type or a hindered phenol type. These weathering stabilizers are usually 0.1 to 2 parts by weight, preferably 0. 0 parts by weight in 100 parts by weight of the solid content in the elastic paving material used in the present invention. It can be used in an amount in the range of 3 to 1 part by weight.

  Moreover, since the elastic pavement material used in the present invention is fluent using a squeegee and then fluently formed to a predetermined thickness using a roller to form an elastic pavement, the viscosity at 25 ° C. is usually 100 to 800 Pa. It is in the range of s, preferably in the range of 200 to 500 Pa · s. In order to make the elastic pavement material of the present invention have the above-mentioned viscosity, the elastic pavement material used in the present invention is an organic solvent that is soluble or dispersible in the urethane prepolymer but has no reactivity. It is desirable to adjust the viscosity using. As an example of such an organic solvent, a nonpolar solvent such as an aromatic solvent such as xylene or toluene can be used. These solvents can be used alone or in combination. Such an organic solvent can be blended in such an amount that the viscosity of the elastic paving material used in the present invention falls within the above range.

  As described above, the elastic pavement material of the present invention includes a thixotropic agent, an inorganic filler, a urethane prepolymer, a dispersant containing an amide compound, and, if necessary, a toner, a liquid additive, and a urethane prepolymer. The reaction catalyst, the liquid polyamine, and the weathering stabilizer can be mixed and used at the same time, but it is preferably packaged so that the reaction of the urethane prepolymer does not proceed.

  Usually, urethane prepolymer (component A), thixotropic agent other than urethane prepolymer, inorganic filler, dispersant containing amide compound, and toner, liquid additive, urethane prepolymer reaction catalyst as required The liquid polyamine and the weathering stabilizer (component B) are packaged.

  In addition, among the above B components, toner, liquid additive, urethane prepolymer reaction catalyst, etc. are separately mixed in an organic solvent to adjust the component (B-1 component), and the other B component is thixotropic. The agent, dimethylacetamide, and liquid polyamine may be further dispersed in an organic solvent (component B-2).

When a polar solvent is used in the present invention, examples of the polar solvent include dimethyl sulfoxide, dimethylformamide, dimethylacetamide, and a mixture thereof, and these can be used alone or in combination. Moreover, these polar solvents can also be used by mixing with nonpolar solvents such as toluene, xylene and hexane. The amount of the polar solvent is suitably 0.5 to 10% by weight with respect to the solid content of the main polyurethane material system. In a normal case, a nonpolar solvent is also used. The amount of the nonpolar solvent is usually 1 to 50% by weight in the whole solvent. When polyethylene glycol is used, the polyethylene glycol includes any ether or esterified derivative having an average molecular weight of 100 to 20,000. The amount of polyethylene glycol used is usually 0.01 to 10% by weight with respect to the solid content in the polyurethane material system.
An elastic pavement using the elastic pavement material as described above can be manufactured, for example, as follows.

First, among elastic paving materials used in the present invention, without using thixotropic agents, polar solvents and / or polyethylene glycol or derivatives thereof, the use of surface-treated inorganic fillers, specifically, surface-treated calcium carbonate, An amide compound and a polyether ester type polyvalent carboxylic acid (for example, Dipalon 3600N (manufactured by Enomoto Kasei Co., Ltd.)) can also be blended with those modified by blending other auxiliaries. The amount is from 1 to 3 parts by weight based on 100 parts by weight of the solid content of the coating material amount of the present invention, and the additive may be blended in the urethane prepolymer in advance, After forming, the material becomes more stable when added to this urethane prepolymer.
The same effect can be obtained by using Disparon 3900 (manufactured by Enomoto Kasei Co., Ltd.) instead of Disparon 3600N as an additive.

  These paving materials are mixed using a mixer having three or more blades. An example of such a mixer is a power mixer PM-220B-R2 manufactured by Toshiba Corporation. In mixing these components, it is desirable to stir the mixing at a low speed of usually 100 to 400 rpm, preferably 250 to 350 rpm. By mixing the materials at such a rotational speed, the entrainment of air into the materials can be reduced. Since the curing reaction of the urethane prepolymer begins to progress when the above components are mixed, the stirring operation is desirably performed in as short a time as possible, usually 3 to 10 minutes, preferably 5 to 8 minutes.

  The pavement material prepared as described above is a squeegee or a combing iron in which the comb blade of the present invention as shown in FIG. Fluent along the running direction of the runway or crossing the runway.

  It is preferable to apply the elastic pavement material of the present invention after applying the all-weather pavement base on the above ascone base layer, and the resin is not completely cured. It is preferable to apply an elastic pavement material at an early point, but when the resin that has been ground is not sticky, apply various solvents or apply a primer or the like to the base resin to create a base layer. The elastic pavement material can be completely adhered. Note that the base resin is not necessarily limited to polyurethane, and resins such as epoxy resin, acrylic resin, polyester, SBR, and vinyl chloride resin, or composites in which a chip is hardened with a binder to these resins can also be preferably used. However, practically, a polyurethane material or a composite material in which a chip is hardened with a binder is most preferable.

  As shown in FIG. 1, the squeegee of the present invention in which the comb blade used here has a comb height h of 2 to 5 mm, preferably 2.5 to 4.0 mm, and the comb formation pitch P is The width is 4.0 to 10.0 mm, the width w (rake width) of the squeegee is 400 to 800 mm, preferably 500 to 700 mm, and the total weight including the handle is 800 to 1500 g, preferably 900 to 1300 g. It is.

  By using the squeegee 20 having such a weight, the high-viscosity paving material can be made uniform, and the coating material is not excessively stretched, so that a paving surface having a predetermined thickness can be formed. it can. By using such a squeegee, it becomes easy to remove air contained in the elastic pavement material.

  In addition, when the pavement material is poured using the squeegee 20 having such a shape, the pavement material is poured into a shape corresponding to the comb shape formed on the squeegee 20, as shown in FIG. However, as shown in FIG. 2A, the squeegee boundary portion may have a higher ridge (step) than the other portions, so that this ridge is flattened as shown in FIG. 2B. Therefore, after the squeegee 20 is used in the present invention, the wrinkle is uniformed using the Wooler 30.

  Next, in order to eliminate the level difference formed by the squeegee as described above, the short-hair or medium-hair Wooler (second) 30 is rolled. The short hair or medium hair Wooler used here is a roller in which polyester fibers having a hair length wL of 4 to 5 mm in the case of short hair as a core material and 5 mm to 14 mm in the case of medium hair are implanted. Further, instead of the woofer roller, a roller having large irregularities formed by processing a porous roller described later can be used.

  The Wooler 30 has a body wall diameter wd3 of usually 30 to 45 mm, preferably 35 to 40 mm, and a body outer wall diameter wd2 of usually 30 to 50 mm, preferably 35 to 45 mm. In the case of short-haired wool rollers, the length wL is usually 3-6 mm, preferably 4-5 mm, and in the case of medium-haired wool rollers, the length wL is usually 11-15 mm, preferably 12-14 mm. Use rollers with fibers.

The step formed by the squeegee can be eliminated by rolling such a short or medium wool roller, preferably along the running direction.
The overall weight of the Wooler is normally 200 to 300 g, and the step formed by the squeegee is removed, but the comb formed by the squeegee maintains the form as it is.

  In addition, there is also a long-haired wool roller having a long hair length exceeding 15 mm. However, if a long-haired wool roller is used, the wrinkle formed by the squeegee may be completely erased by winding the coated paving material. It is not appropriate to use.

  In the present invention, in order to make the thickness of the elastic pavement uniform, after the elastic pavement material is uniformly applied in the vertical or horizontal direction with a squeegee or a combing iron (first), it is preliminarily applied by a roller (second). Rolling out and removing a large level difference on the surface is important for obtaining a uniform thickness and uneven circle in a later process.

Next, in the present invention, the porous roller (third to fifth) is caused to roll on the pavement surface in which the level difference has been eliminated by the wool roller as described above.
Here, the porous roller is one that is processed to be porous among rollers, and examples thereof include a mastic hand roller, a pattern roller, a sand-bone roller, etc. (all manufactured by Otsuka Brush Manufacturing Co., Ltd.).

Examples of the material of the porous roller include a porous resin roller obtained by foaming a plastic such as polyurethane resin and vinyl acetate resin, a metal wire mesh such as stainless steel, brass, and aluminum, or a material wound with a punching metal. However, in the present invention, it is particularly preferable to use a skeleton foam processed after foaming a polyurethane resin. Also, a mastic roller, a metal roller, and a sand roller can be used. However, when a mastic roller is used, surface irregularities tend to be remarkable.
The size of the holes formed on the surface of these rollers is usually in the range of 2 to 20 mesh, preferably 4 to 10 mesh.

  Further, the hardness of these roller materials measured by an ASKER F hardness tester is usually 30 to 60, preferably 40 to 50. When this was applied using a porous roller having a hardness of 15, an uneven pattern was not sufficiently formed on the painted surface. Moreover, when it apply | coats similarly using the porous roller of hardness 91, the embossed material itself will move and a large and small uneven pattern will be formed.

In the present invention, the surface treatment with the porous roller as described above is performed three times (third, fourth, and fifth).
Hereinafter, a case where a sand-bone roller is used as the porous roller will be described as an example.
The rolling speed and rolling direction of the third, fourth, and fifth sandbone rollers greatly affect the uniformity of the finished surface.
It is desirable that the third sandbone roller be processed at a rolling speed of 2 to 4 m / second, preferably 2.2 to 3.8 m / second, in a direction parallel to the direction of the road.

  Further, the fourth sand bone roller is generally at a right angle to the rolling direction of the third sand bone roller and is usually at a rolling speed of 0.5 to 1.5 m, preferably 0.7 to 1.3 m per second. It is desirable to process.

  Further, the fifth sand roller is usually in a direction parallel to the rolling direction of the fourth sand roller, and the rolling speed is usually 0.5 to 1.5 m, preferably 0.7 to 1.3 m per second. It is desirable to process with. The rolling direction and speed of the fifth sand-bone roller determines the final finished state of this elastic pavement and must be done with particular care.

  When the rolling direction of the roller is set to the first roller (third) in the vertical direction (in many cases, parallel to the direction of the runway) in this way, the next roller is set to the lateral direction (often in the direction of the runway). The convex part of the concavo-convex pattern is independent when rolling to a right angle). When rolling only in the vertical direction or only in the horizontal direction, the convex and concave portions are easily connected continuously. Further, similarly, the next roller (fifth) rolls in the lateral direction (in many cases, at right angles to the direction of the running path), thereby forming a desired uniform uneven surface.

  In addition, although the construction width is usually divided every 1.3 to 2.5 meters, the construction width may reach 4 meters depending on the construction part. In such a case, a roller joint is attached to the roller to cope with a wide portion. As the roller joint, an aluminum slide joint manufactured by Otsuka Brush Manufacturing Co., Ltd. with an extension length of up to 5.1 is used, but an extension length of 3.5 to 1.95 m is easy to use and efficient. It is.

  As described above, the shape of the concavo-convex pattern on the surface finish is particularly good for track and field stadiums, such as shock absorption, shock absorption, rebound, moderate slip resistance, etc. The topping finish has been the mainstream since the advent of polyurethane elastic pavement, but recently it has been changed to an uneven pattern called embossing in consideration of the above points.

In the shape structure as described above, the coating thickness of the elastic paving material is usually 0.5 to 3.0 mm, preferably 1.0 to 1.5 mm.
The coating amount of the material is preferably 0.5 to 3 kg per 1 m ² as a solid content.
The construction method is usually a method of application at the site after the application of the base resin, but a construction using a so-called prefabricated method in which a resin sheet applied at a factory is bonded on the site is also possible.

  According to the present invention, a conventional polyurethane material system is applied with a material having a special tremor-changing effect on the surface of the base resin by using the above-described roller. This effect is extremely remarkable because it provides a high-performance pavement surface with irregularities and high durability, and the change in thixotropic index is small even with changes in temperature due to environmental changes, and the surface finish An uneven pattern can be formed uniformly.

  Thus, the difference in height of the average uneven surface of the embossed surface obtained by finally transferring the sand-bone roller is usually in the range of 0.25 to 5.0 mm, preferably 0.5 to 3.0 mm. is there. Further, the elastic pavement formed as described above has an elastic modulus at 25 ° C. of usually 2 to 50 Pa · s, preferably 0.5 to 30 Pa · s.

A pavement having such a concavo-convex surface and having an elastic modulus in the above range is suitable as an all-weather pavement for achieving good recording because it is firmly spiked and has an excellent repulsive force. Further, since the surface of the elastic pavement is moderately rough, there is little reflection on the pavement surface, and the reflected light does not become an obstacle.
Moreover, since it has a suitable elastic modulus, it is easy to apply spikes and the like, and there is an advantage that the characteristic of preventing a fall accident is extremely high.

  EXAMPLES Next, the present invention will be described in more detail with reference to examples of the present invention, but the present invention is not limited thereto.

[Example 1]
As the A liquid of the polyurethane elastic pavement stock solution system, polyoxypropylene having an average molecular weight of 2000 and excess tolylene diisocyanate (2,4-form / 2,6-form = 80: 20, weight) are reacted at room temperature. Thus, a prepolymer having a terminal isocyanate group content of 5.2% was produced.

  Apart from this, as liquid B of the polyurethane elastic pavement stock solution B system of the present invention, 64 kg of liquid amine containing methylenebis (o-chloroaniline), 40 kg of toner, 20 kg of heavy calcium carbonate (average particle size 1.85 μm), liquid addition Liquid B consisting of 56 kg of the agent, 8 kg of the tin catalyst and 2 kg of the weathering stabilizer was produced.

The A liquid and B liquid were mixed by stirring at a weight ratio of 1: 1 to prepare the elastic pavement material of the present invention.
The mixture of A component: B component = 1: 1 was paved to a thickness of 12 mm on an ascon substrate that had been subjected to a known substrate treatment in advance. The pot life of the paving material thus constructed is about 60 minutes. The base layer thus constructed was left for 18 hours.

18 hours later, A component 50 kg, B component 50 kg, Aerosil # 200 (ultrafine silica powder (average particle size 12 nm, specific surface area 200 m ² / g)) 3.5 kg, dimethylacetamide 2.5 kg, toluene 17. 5 kg and 2 kg of Disparon 3600N (manufactured by Enomoto Kasei Co., Ltd.) were mixed and stirred using a stirrer having three stirring blades so as not to involve air as much as possible to produce the elastic pavement material of the present invention. .

  The viscosity of the elastic paving material thus produced at 25 ° C. was 300 Pa · s, and the pot life was 90 minutes. In the elastic pavement material having such a viscosity, air is entrained to some extent at the time of stirring, and bubbles are present, but most of the bubbles disappear in the coating process using a squeegee.

  The elastic pavement material thus obtained has a comb height of 3.5 mm, a pitch of the combs of 7 mm, and a 1 kg weight squeegee including the handle (branch part) (first) in the running direction of the track. It was applied uniformly by moving the elastic pavement material along the length and breadth.

  Next, a 272 g-weight Wooler (second), which includes a handle portion in which a large number of fibers having a length of 22.9 cm are implanted on the surface of the cylindrical support, is rolled to the boundary of the squeegee on the surface. I removed the big step (畝).

  Next, a sand bone (porous) roller (third) having a weight of 1573 g including the branch portion was rolled in parallel to the direction of the coating work to form a rough uneven pattern on the surface. Subsequently, the sand bone roller (fourth) rolls at a right angle to the pavement work, and the sand bone roller (fifth) rolls at a right angle to the direction of the work to make it more homogeneous on the surface. It was possible to finish in a rough pattern.

The amount of the coating material was about 1.2 kg per 1 m ² . Although the temperature of the base urethane pavement surface at this time was 55 ° C., there was no difference in the surface unevenness state between the two even when compared with the finished surface constructed by the same method when the surface temperature was 25 ° C.

<Measurement method of thixo index>
In the present invention, the thixo index value was measured as follows.
The resin viscosity was measured with a B-type rotational viscometer specified in JAS-k-7117 (viscosity test method using liquid resin rotational viscosity system). The resin temperature was set at three levels of 25 ° C., 40 ° C., and 55 ° C. The rotor number of the viscosity measurement was No. 7, and the rotor rotation speed of the viscometer was measured at 2 rpm and 20 rpm, and the 2 rpm measured value / 20 rpm measured value was defined as the thixo index.

[Example 2]
In Example 1, 0.5 kg of polyethylene glycol (molecular weight: 3000) was added in place of dimethylacetamide, and a material obtained by stirring and mixing 2 kg of Disparon 3600N was uniformly applied using a comb iron (first), and then Wooler Short After rolling in advance using the hair (second) to erase the large step on the surface, the sandbone roller (third) is rolled in parallel to the traveling direction of the runway to give a rough uneven pattern on the surface. Formed. Subsequently, the sand-bone roller (fourth) and the sand-bone roller (fifth) were rolled at a right angle and parallel to the working direction of the comb iron to make the surface more uniform and finished with a uniform uneven pattern.

The coating material was about 1.2 kg per 1 m ^2. The surface temperature of the base urethane coating surface at this time was 55 ° C, but when the surface temperature was 25 ° C, As a result of comparison, the same uneven pattern surface could be obtained.

Example 3
In Example 1, instead of Aerosil # 200, 5 kg of dimethylacetamide and 20 kg of heavy calcium carbonate, 32 kg of surface-treated calcium carbonate (average particle size: 1 to 10 μm, specific surface area: 15 m ² / g) was added, and Disparon 3600 N ² kg After stirring and mixing the material uniformly with a comb iron (first), and then rolling in advance with a short Wooler hair (second) to remove a large step on the surface, 3) was rolled in parallel with the traveling direction of the combing iron to form a rough uneven pattern on the surface. Subsequently, the sand-bone roller (fourth) and the sand-bone roller (fifth) were rolled at right angles to the traveling direction of the comb iron to make the surface more uniform and finished with a uniform uneven pattern.

The coating material was about 1.2 kg per 1 m ^2. The surface temperature of the base urethane coating surface at this time was 55 ° C, but when the surface temperature was 25 ° C, As a result of comparison, the same uneven pattern surface could be obtained.

Claims (10)

An elastic paving material containing a thixotropic agent, an inorganic filler, a urethane prepolymer, and a dispersant containing an amide compound and / or a polyether ester type polyvalent carboxylic acid on an underlying resin paved on ascon A squeegee fluent in
The squeegee's elastic pavement edge surface is formed into a comb shape having a pitch width of 4.0 to 10.0 mm and a height of 2 to 6 mm, and the total weight including the branches is 800 to A squeegee characterized by being in the range of 1500 g.   After the pavement material is poured using the squeegee, the pavement material is flattened using a woofer, and after passing through a first sandbone roller transfer step using a sandbone roller, it is perpendicular to the transfer direction of the first sandbone roller. After passing through the second sandbone roller transfer step and the second sandbone roller transfer step, the sandbone roller is transferred in a direction parallel to the second sandbone roller transfer direction. The squeegee according to claim 1, wherein the step (third sandbone roller transfer step) is performed.   The squeegee according to claim 1, wherein the dispersant further contains a (meth) acrylic (co) polymer.   3. The polyurethane prepolymer having an isocyanate group at a terminal: the dispersant is contained in an amount within a range of 1 to 5% by weight based on 100 parts by weight. Squeegee.   The elastic paving material is urethane containing at least one compound selected from the group consisting of methylenebis-o-chloroaniline (MBOCA), o-chloroaniline and a condensate (including a mixture) of aniline and / or formalin. 3. The squeegee according to claim 1 or 2, wherein the squeegee is contained as a curing agent.   The squeegee according to claim 1, wherein the elastic pavement material has a viscosity at 25 ° C in a range of 200 to 500 Pa · s.   The method for forming an elastic pavement according to claim 1, wherein the pot life of the elastic pavement material is within a range of 10 minutes to 90 minutes.   The difference in height of the average uneven surface of the all-weather pavement surface obtained by finally transferring the sand roller is within a range of 0.25 to 5.0 mm. Squeezy.   The squeegee according to claim 1, wherein the elastic pavement formed as described above has an elastic modulus at 25 ° C in the range of 2 to 50 PA · s.   The elastic pavement material is poured using a squeegee and then flattened using a woofer and then transferred in at least three directions using a porous roller to form irregularities on the pavement surface. The squeegee according to any one of Items 1 to 9.