KR100932716B1 - Composition for flooring material having minute surface structure and flooring material using the same - Google Patents

Abstract

PURPOSE: A flooring material is provided to ensure toughness capable of enduring a driving load of vehicles effectively and to improve resistance to oil or organic acid and heat resistance. CONSTITUTION: A flooring material comprises a polyurethane base material, a polyurethane hardener, and powder. The polyurethane base material comprises any one selected from polyoxyethylene glycol, polyester polyol, plasticizer, coloring pigment, filler and any one selected from water, methanol and ethanol. The polyurethane hardener comprises isocyanates and latent handener. The latent hardener comprises at least one selected from ethylene carbonate, propylene carbonate, oxazolidines and aldimines.

Description

Composition for flooring material having minute surface structure and flooring material using the same}

The present invention relates to a flooring composition having a fine surface structure and a flooring material thereby, and more particularly, to a flooring composition comprising a polyurethane main material, a polyurethane curing agent, and a powder.

Conventionally, a parking lot floor of a building has a general floor material such as a solvent- or solvent-free epoxy paint, a composite material mixed with cement mortar or silica sand mortar to such an epoxy paint, or a hard urethane paint, and specifically, Korean coating material. The inorganic flooring material as disclosed in 2006-0008246 was painted in various ways from a thickness of 100 μm to a thickness of 10 mm, and the method of reducing frictional noise with the tire of such a flooring material is disclosed in Korean Patent Nos. 499731 and 10-0686451. As described above, to form a layer of artificial irregularities using silica sand spray, or to coat the base coat using a polyurea resin composition as disclosed in Korean Patent No. 10-0592484 and then repainted with an embossed coat to artificially To reduce noise by forming uneven patterns Doing.

However, among the above methods, the method of forming the silica sand layer causes the tire to be damaged by the friction between the tire and the silica sand, and the occurrence of contaminants such as foreign substances or particles caused by the rupture of the silica sand due to the tire damage. Frequently, contaminants accumulate in the gaps of irregularities, making it difficult to remove them through cleaning, resulting in problems of aesthetics and poor riding comfort.The coating method using the polyurea introduced in the latter requires special equipment. In addition, there are difficulties in construction, such as having to have a skilled construction technology, and has a disadvantage that is not economical due to the relatively high product price and construction price.

     SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems, and one object of the present invention is to have a robustness that can effectively withstand the running load of the vehicle, while giving economical construction and appearance beauty, while driving the vehicle without making artificial unevenness. It is to provide a flooring composition having a fine surface structure that can suppress the generation of noise due to friction with the tire.

Another object of the present invention is to further increase the environmental friendliness, to increase the resistance and heat resistance to oils and organic acids, to provide a composition for flooring with increased stability.

Still another object of the present invention is to provide a flooring construction method using the composition and a flooring material thereby.

One aspect of the invention is a flooring composition comprising a polyurethane motif, a polyurethane curing agent, a powder,

The polyurethane base material includes any one of polyoxyethylene glycol, polyester polyol, plasticizer, coloring pigment, filler, and water, methyl alcohol, ethyl alcohol,

    The polyurethane curing agent includes isocyanates and latent curing agents, wherein the isocyanates are diphenylmethane diisocyanate (MDI) or a prepolymer thereof, toluene diisocyanate (TDI) or a prepolymer thereof, hexamethylene diiso cyanate (HDI). ) Or a prepolymer thereof, and at least one of isophorone diisocyanate (IPDI) or a prepolymer thereof, wherein the latent curing agent is ethylene carbonate (EC), propylene carbonate (PC), oxazolidines and Consisting of at least one of aldimines;

      The powder relates to a flooring composition comprising cement, silica and slaked lime.

The flooring formed by the present invention has a toughness that can effectively withstand the running load of the vehicle, while providing economical efficiency and appearance beauty in construction, while suppressing the occurrence of noise due to friction with the tire while driving the vehicle without making artificial unevenness You can. In addition, the flooring further increased environmental friendliness, increased resistance and heat resistance to oils and organic acids, thereby increasing stability.

The present invention to achieve the above object, the present invention provides a flooring composition comprising a polyurethane base, a polyurethane curing agent and powder.

Hereinafter, each composition will be described in more detail.

The composition is a polyurethane main material, a curing agent and powder in a weight ratio of 1: 0.5 to 1.5: 1 to 15 Can be mixed. The numerical range of each component ratio is considered for formation of micro surface structure, workability, mechanical strength and various chemical resistance and economics.

A) polyurethane motif

Polyurethane motifs of the compositions according to the invention include polyoxyethylene glycol, polyester polyols, plasticizers, pigmented pigments, fillers, and any one of water, methyl alcohol and ethyl alcohol.

Polyurethane base material is based on 100% by weight of polyoxyethylene glycol 0.1-30% by weight, polyester polyol 5-50% by weight, plasticizer 1-40% by weight, pigment pigment 5-15% by weight, filler 1-5% by weight And, and any one of water, methyl alcohol, ethyl alcohol may include 5 to 40% by weight.

The polyurethane base material may further include 0.1 to 3% by weight of antifoaming agents, precipitation inhibitors, wetting and dispersing agents that can be commonly predicted in the art.

Polyoxyethylene glycol

The polyoxyethylene glycol may have a weight average molecular weight of 200 to 1000, and one or two OH functional groups may be used. The polyoxyethylene glycol may use one or both functional groups, in this case, 0.1 to 5% by weight of the polyoxyethylene glycol, 0.05 to 30% by weight of polyoxyethylene glycol having one OH functional group, OH It is preferable to use the polyoxyethylene glycol which has two functional groups at 0.1-20 weight%.

When the weight average molecular weight is 200 ~ 500 is more advantageous for workability, mechanical strength and water resistance and chemical resistance.

The polyoxyethylene glycol may be included in 0.05 ~ 30% by weight in the main material, if it exceeds 30% by weight may cause problems of poor storage stability and the surface unevenness of the final cured product, less than 0.05% by weight may have a problem in workability have.

Polyester polyol

The polyester polyol is prepared using a semi-dry or undried oil having an iodine number (oxo number) of 120 or less as a natural oil-modified polyester polyol, having a hydroxyl value of 50 to 250 and an acid value of 3 or less, and an average number of OH functional groups. It is preferable to use what is 2-4. More preferably, a polyol having an acid value of 0.5 or less is used.

When the hydroxyl value is in the range of 50 to 250, it is advantageous for the curing rate, the mechanical strength of the cured product, and various chemical resistances.

In the present invention, when the polyether polyol is used, dispersibility is very bad at the time of preparing the main body, and storage stability of the main body is poor, resulting in precipitation of pigment and Caking phenomenon. In addition, there is a problem that surface unevenness such as dichroism and unevenness of the surface occurs during curing.

Temporary material

Plasticizers provide product flexibility and are used to increase self-leveling capabilities and can be used at 1 to 40 percent by weight of the main weight.

The plasticizer is dioctyl phthalate (DOP), ibutyl phthalate (DBP), benzyl butyl phthalate (BBP), dioctyladiate (DOA), diisobutyl phthalate ( DIBP) and the like, but these plasticizers are classified as environmental hormones and the like, and in the present invention, eco-friendly plasticizers that do not report environmental toxicity, that is, diisononyl adipate (DINA), citric acid esters, etc. It is preferable to use a product having an acid value of 0.1 or less, more preferably.

Pigmentation Pigment

The pigment may be used in the range of 5 to 15% by weight, titanium dioxide, sulfur oxides, iron oxides, and the like, preferably excluding the use of heavy metal pigments known to be toxic.

Filler

The filler may include hydrophobic amorphous silica and one or more selected from the group consisting of calcium carbonate, quicklime, calcium hydrogen carbonate, talc, and silica. The hydrophobic amorphous silica induces microsurface alignment during curing of the composition.

The filler may be used in the content of 1 to 20% by weight, of which the content of the hydrophobic amorphous silica is preferably 1 to 2% by weight and other fillers are 18 to 19% by weight.

Water, methyl alcohol, ethyl alcohol

In the present invention, one or a mixture of water, methyl alcohol and ethyl alcohol may be included in the ratio of 5 to 40% by weight in the polyurethane theme. It is involved in the crosslinking reaction of polyurethane resin and the hydration reaction of cement, and is also involved in self-leveling property as a solvent. Among them, water is preferably to be used deionized water (deionized water) from which the ions are removed.

B) polyurethane curing agent

The polyurethane curing agent includes isocyanates and latent curing agents. Wherein the isocyanates are diphenylmethane diisocyanate (MDI) or prepolymers thereof, toluene diisocyanate (TDI) or prepolymers thereof, hexamethylene diiso cyanate (HDI) or prepolymers thereof, and isophorone diisocyanate (IPDI) or its Use at least one of the prepolymers.

The latent curing agent may be used at least one of ethylene carbonate (EC), propylene carbonate (PC), four oxide Jolly Dean (Oxazolidine) acids and Aldi Min (Aldimine) acids.

The diphenylmethane diisocyanate (4,4`-diphenylmethane diisocyanate, MDI) may be a monomer MDI and polymerized MDI or MDI prepolymer, NCO% is 20 ~ 33%, the average number of functional groups is 2.3 ~ 3.0 Use as much as possible.

Toluene diisocyanate (TDI) or its prepolymers, hexamethylene diiso cyanate (HDI) or its prepolymers, and isophorone diisocyanate (IPDI) or its prepolymers or dimers or trimers thereof can also be used, in which case NCO% is used in the range of 4.5 to 15% average functional groups in the range of 2 to 3, preferably 20 to 50% by weight ratio (in 90 to 99.1% by weight of isocyanates) to isocyanates rather than used alone To use it.

In the present invention, a latent curing agent may be used for controlling workability and crosslinking density of the product. As a latent curing agent, ethylene carbonate (EC), propylene carbonate (PC), oxazolidines, and Aldi Latent curing agents, such as aldimine, can be used individually or in mixture.

The polyurethane curing agent may include 90 to 99.1 wt% of isocyanates and 0.1 to 10 wt% of a latent curing agent.

The latent hardener is preferably used at 0.1 to 5% by weight.

If the latent curing agent is out of 0.1 to 10% by weight may cause problems of rapid hardening, poor smoothness and foaming of the final cured product.

C) powder

In the present invention, by adding the powder to the polyurethane resin, the cement component in the powder and the water or alcohol component in the polyurethane main body are solidified through a hydration reaction, and the silica sand component is uniformly dispersed in the polyurethane resin to further improve the toughness. do. In addition, in general, it forms a similar component with the concrete (base) and has similar shrinkage expansion coefficient. Therefore, it is organically tuned to the change caused by the shrinkage and expansion of the mother during the winter and summer seasons. The occurrence of defects can be suppressed.

The powder may include 5 to 80% by weight of cement, 10 to 80% by weight of silica, and 1 to 40% by weight of slaked lime. In addition, the present invention may further include 0.5 to 1.5% by weight of the AE agent, water reducing agent, retarder, accelerator, etc. that can be commonly predicted in the technical field to which the present invention belongs, and 3 to 3 admixtures such as blast furnace slag or fly ash. It may be further mixed in 10% by weight.

The cement may be portland cement, more specifically, white portland cement, and may be used by mixing alumina cement, superhard cement, or blast furnace slag cement.

In this case, the powder is 4 to 65% by weight of white portland cement, 1 to 15% by weight of at least one of alumina cement, cemented carbide and blast furnace slag cement, 10 to 80% by weight of silica, 1 to 40% by weight of lime May contain%. Preferably 3 to 10% by weight of one or more of alumina cement, cemented carbide cement and blast furnace slag cement may be used.

The silica used in the powder may include 1 to 5% by weight of fine silica having a plate-like structure and 5 to 15% by weight of spherical silica.

It is because the content range of the plate-like structure and the spherical silica is good for workability and formation of a fine surface structure.

The flooring composition is agitated so that the polyurethane main material and the polyurethane curing agent may be sufficiently mixed first, and then the powder is mixed so that the polyurethane resin and the powder are sufficiently mixed to be uniform.

In another aspect, the present invention relates to a flooring formed by applying the composition on a base surface. The base surface may generally be a concrete base surface.

The flooring material may include fine roughness on a surface to suppress tire friction noise. The fine irregularities may protrude to a size of 0.05 ~ 5㎛, but is not limited thereto.

The flooring formed by the composition tends to be separated into a lower layer that strongly exhibits the properties of cement and an upper layer that strongly exhibits the properties of the polyurethane elastomer, and fine unevenness is formed on the surface of the upper layer while maintaining a beautiful appearance.

The irregularities are judged to be caused by the curing rate, flowability, and arrangement characteristics of the silica composition having the plate-like or spherical structure during curing of the composition.

The inventors believe that when the minute unevenness occurs, diffuse reflection of light due to the unevenness occurs, thereby causing a matte appearance. Also, when the fine unevenness has a certain intensity, it is determined that the fine unevenness has a noise reduction effect. In the case of matte products generally used in the prior art, diffuse reflection is caused by mixing diffuse reflection materials on the surface or inside, but unlike the present invention, it does not exhibit a noise reduction effect.

1A to 1C show photographs of a laser scan micrometer (LSM) photographed on a floor of a parking lot and a flooring surface formed by an embodiment of the present invention.

1A to 1C, as a conventional flooring material, 1a represents a hard urethane-based flooring material, 1b represents an epoxy lining flooring material, and 1c is a flooring material formed by the composition of the present invention. It can be seen that only the bottom ash formed by the present invention by FIG. 1c forms fine irregularities on the surface.

      The flooring formed by the composition can effectively suppress the occurrence of noise due to the friction of the tire by forming invisible fine unevenness on the surface while maintaining a beautiful appearance on the surface of the upper layer where the elastic properties are strongly exhibited.

In another aspect, the present invention relates to a method for constructing flooring using the composition.

The method includes removing impurities from the base surface; First applying a composition of the present invention on the base surface to a thickness of 0.5 to 1 mm; And applying the composition according to the present invention after the first application to a thickness of 2.5 to 4 mm.

The impurity removal step is a step of cleanly processing the latency or foreign matter in the concrete of the construction of the building.

The first application step is to apply the composition as a paint coating. In the first coating step, the thickness is preferably 0.5 to 3 mm, preferably 0.5 to 1 mm.

The second coating step is a step of applying the composition as a top coat. In the second coating step, the thickness is preferably 2 to 5 mm, preferably 2.5 to 4 mm.

Figure 2 shows a flooring formed by one embodiment of the present invention. Referring to FIG. 2, the primary coating layer 2 and the secondary coating layer 3 of the composition are formed on the concrete base surface 1.

The method may further include a step of repairing by mixing the composition and the filler such as silica sand when there is damage or cracks on the concrete floor surface after treating the impurities.

The method may be applied once to the composition 3 to 5mm after the primer treatment on the concrete ground of the building.

The method may be used to form a top coat layer by applying a second main coating as a top coat with the composition after the first prior coating (scraping) using the composition after the primer treatment.

Figure 3 shows a flooring formed by another embodiment of the present invention. Referring to FIG. 3, the concrete bottom surface 1, the primer layer 4, the primary coating layer (preceding coating layer) 2 and the secondary coating layer (top coating layer) 3 according to the composition in order It can be formed as.

The method may further comprise attaching the surface material further onto the flooring formed by the composition. The step may be sprayed on the top coat layer formed by the composition of the present invention, such as silica sand to prevent slipping.

Hereinafter, the present invention will be described in detail by showing preferred examples and test examples of the present invention, but the scope of the present invention is not limited to the examples.

Example 1

Manufacture of the subject

Polyoxyethylene glycol (M-LE1013, product of Dongnam Synthetic Co., Ltd.), 1 wt%, polyester polyol (AH-160T, AHA, 350 hydroxyl group), 47 wt%, 20 wt% dibutyl phthalate (DBP) as a plasticizer %, 10% by weight of TiO ₂ , 1% by weight of dispersant, 2% by weight of antifoam, and 1% by weight of amorphous silica (Aerosil 200, Degussa), 3% by weight of CaCO 3, and 15% by weight of water were mixed.

Preparation of Curing Agent

As the curing agent, diphenylmethane diisocyanate (4,4`-Diphenylmethane diisocyanate, C-MDI) and polymeric MDI (M-20S, product of BASF) were mixed in a weight ratio of 10:90, respectively, to use 97% by weight of the curing agent. And 3 weight% of oxazolidine was used as a latent hardener.

powder

The powder was used by mixing 30% by weight of white Falkland cement, 60% by weight of silica (plate, spherical, general artificial silica sand mixture), 10% by weight of lime.

Mixing was carried out in a weight ratio of 1: 1: 4 in a weight ratio of a main agent, a hardener, and a powder, and then a curing agent was mixed to form a flooring composition of the present invention.

Reference Example 1

The main body and powder were prepared in the same manner as in Example 1, except that the curing agent was diphenylmethane diisocyanate (4,4`-Diphenylmethane diisocyanate, C-MDI) and polymeric MDI (M-20S, product of BASF), respectively. 100 wt% was prepared by mixing at a weight ratio of 10:90.

Mixing was carried out in a weight ratio of 1: 1: 4 in a weight ratio of a main agent, a hardener, and a powder, and then a curing agent was mixed to form a flooring composition of the present invention.

Reference Example 2

Manufacture of the subject

Polyester polyol (AH-160T, AHA, 350), 48% by weight, 20% by weight of dibutyl phthalate (DBP) as a plasticizer, 10% by weight of TiO ₂ as colored pigment, 1% by weight of dispersant, 2% by weight of antifoaming agent As a filler, 1 wt% of amorphous silica (Aerosil 200, Degussa), 3 wt% of CaCO3, and 15 wt% of water were mixed.

Preparation of Curing Agent

As the curing agent, diphenylmethane diisocyanate (4,4`-Diphenylmethane diisocyanate, C-MDI) and polymeric MDI (M-20S, product of BASF) were mixed in a weight ratio of 10:90, respectively, to use 97% by weight of the curing agent. And 3 weight% of oxazolidine was used as a latent hardener.

powder

Powder was used by mixing 30% by weight of white Falkland cement, 60% by weight of silica (plate, spherical, artificial artificial silica mixture), 10% by weight of slaked lime.

Mixing was carried out in a weight ratio of 1: 1: 4 in a weight ratio of a main agent, a hardener, and a powder.

Reference Example 3

Manufacture of the subject

1% by weight of polyoxyethylene glycol (M-LE1013, product of Dongnam Synthetic), polyester polyol (AH-160T, AHA, 350 hydroxyl value), 47% by weight, 20% by weight of dibutyl phthalate (DBP) as a plasticizer 10% by weight of TiO ₂ , 1% by weight of dispersant, 2% by weight of antifoaming agent, 4% by weight of CaCO 3, and 15% by weight of water were mixed.

Preparation of Curing Agent

As the curing agent, diphenylmethane diisocyanate (4,4`-Diphenylmethane diisocyanate, C-MDI) and polymeric MDI (M-20S, product of BASF) were mixed in a weight ratio of 10:90, respectively, to use 97% by weight of the curing agent. And 3 weight% of oxazolidine was used as a latent hardener.

powder

The powder was used by mixing 30% by weight of white Falkland cement, 60% by weight of silica (plate, spherical, general artificial silica sand mixture), 10% by weight of lime.

Mixing was carried out in a weight ratio of 1: 1: 4 in a weight ratio of a main agent, a hardener, and a powder, and then a curing agent was mixed to form a flooring composition of the present invention.

Reference Example 4

Manufacture of the subject

Polyoxyethylene glycol (M-LE1013, product of Dongnam Synthetic Co., Ltd.), 1 wt%, polyoxypropylene glycol (PP-400, Polyol Co., Ltd., molecular weight 400), 47 wt%, dibutyl phthalate (DBP) 20 as a plasticizer 10% by weight, 10% by weight of TiO ₂ , 1% by weight of dispersant, 2% by weight of antifoam, and 1% by weight of amorphous silica (Aerosil 200, Degussa), 3% by weight of CaCO 3, and 15% by weight of water were mixed.

Preparation of Curing Agent

As the curing agent, diphenylmethane diisocyanate (4,4`-Diphenylmethane diisocyanate, C-MDI) and polymeric MDI (M-20S, product of BASF) were mixed in a weight ratio of 10:90, respectively, to use 97% by weight of the curing agent. And 3 weight% of oxazolidine was used as a latent hardener.

powder

The powder was used by mixing 30% by weight of white Falkland cement, 60% by weight of silica (plate, spherical, general artificial silica sand mixture), 10% by weight of lime.

Mixing was carried out in a weight ratio of 1: 1: 4 in a weight ratio of a main agent, a hardener, and a powder, and then a curing agent was mixed to form a flooring composition of the present invention.

Comparative Examples 1 to 8

Currently urethane-based hard floor materials (Comparative Example 1), epoxy-based thin film coating (Comparative Example 2), epoxy lining (Comparative Example 3), glossy acrylic thin film coating (Comparative Example 4), matt acrylic based Thin film coating construction (Comparative Example 5), silica sand spray type epoxy flooring material (Comparative Example 6), silica sand spraying type urethane flooring material (Comparative Example 7), and embossed urethane flooring material (Comparative Example 8) were used as comparative examples.

Test Example 1. Curing and physical property test of eco-friendly parking lot flooring composition having fine surface structure and composition of each example

      The physical properties of the coating film of the composition exemplified above were tested as follows.

1) Appearance:

2) Pot life (25 ℃):

3) Curing time (25 ℃): Walking within 8 hours, 24 hours light vehicle

4) Hardness (Shore D): 80 or more

5) Flexural strength: More than 20 N / mm ² (KS F 4042-2007)

6) Compressive strength: 50 N / mm ² or more (KS F 4042-2007)

7) Slump (mini slump; cm / 25 ℃):

8) KS F 4937-2008 test (Example 1 and Reference Examples 1-4 measurement)

9) chemical resistance test; The test specimen was immersed in the solution for 72 hours, taken out, and left for 1 hour at room temperature and humidity. The test result was evaluated based on the absence of discoloration, such as cracking, swelling, fine crack distortion, and strength change (softening).

 Chemical resistance measurement result of Example 1

Test Example 2. Measurement of Tire Friction Noise by Flooring

The results of measuring the friction noise of the floorings (Comparative Examples 1 to 8) and floorings formed by Example 1 and Reference Examples 1 to 4, which are characterized by conventional flooring and frictional noise reduction, are as follows.

Friction noise measurement result

○ The noise measurement was performed using TM-103 model of TENMARS ELECTRPMOCS CO., LTD. Each specimen is made of two 75mm x 52mm sized specimens. This is the result of measuring the noise generated when rotating.

○ The noise difference between left and right wheels occurred at the maximum value of 3 ~ 5db (the maximum value recorded high value), and the average value was almost similar.

As shown in Table 6, Example 1 shows a very good noise reduction effect compared to the comparative examples. In addition, in the case of the reference example, a part of the configuration of the present invention exhibited a noise reduction effect superior to the comparative examples, but slightly higher noise than the comparative example.

As described above, the environment-friendly parking lot flooring composition having a fine surface structure according to the present invention is slightly weaker than epoxy flooring, but excellent in high-strength concrete, and excellent in wear resistance, impact resistance, cracking, and the like compared to epoxy flooring. There are few defects such as breakage, peeling and dropping due to impact, and it is possible to work at low temperature, so it is possible to construct at low temperature in winter or low temperature in cold storage, etc. Provide easy eco-friendly flooring.

      In addition, it is possible to perform simple construction by similar construction methods, and there is no price increase due to the use of special materials or equipment, and it is economically advantageous and beautiful appearance without worrying about the increase of labor cost due to the increase of construction process. Eggplant provides a flooring, and provides a parking lot flooring having a property of significantly suppressing the friction noise of the tire.

      In addition, there are problems such as providing unpleasant feelings during the control and passage of vehicles and pedestrians due to problems such as organic solvents or reactant-specific smells and scattering problems in construction methods when repairing other types of flooring materials. Flooring provided through the invention does not have the smell of other organic matters in addition to environmentally friendly properties, provides a convenient flooring repair.

The composition of the present invention has excellent environmental resistance, acid alkali, salts, solvents, and also excellent resistance to unusual organic acids, and excellent heat resistance to provide a flooring material that can be applied to various types of food factories with high temperature steam cleaning, etc. do.

 1A to 1C show photographs of a laser scan micrometer (LSM) photographed on a floor of a parking lot and a flooring surface formed by an embodiment of the present invention.

Figure 2 shows a flooring formed by one embodiment of the present invention

Figure 3 shows a flooring formed by another embodiment of the present invention.

Description of the main parts of the drawing

1. Concrete base 2. Primary coating layer (priority coating layer)

3. Secondary coating layer (top coat layer) 4. Primer

Claims (13)

A flooring composition comprising a polyurethane base, a polyurethane curing agent, and a powder, wherein the polyurethane base comprises polyoxyethylene glycol, polyester polyols, plasticizers, pigmented pigments, fillers, and water, methyl alcohol, ethyl alcohol and, The polyurethane curing agent includes isocyanates and latent curing agents, wherein the isocyanates are diphenylmethane diisocyanate (MDI) or a prepolymer thereof, toluene diisocyanate (TDI) or a prepolymer thereof, hexamethylene diiso cyanate (HDI). ) Or a prepolymer thereof, and at least one of isophorone diisocyanate (IPDI) or a prepolymer thereof, wherein the latent curing agent is ethylene carbonate (EC), propylene carbonate (PC), oxazolidines and Consisting of at least one of aldimines; And        The powder comprises cement, silica and slaked lime, The polyurethane main material is 0.05 to 30% by weight of polyoxyethylene glycol, 5 to 50% by weight of polyester polyol, 1 to 40% by weight of plasticizer, 5 to 15% by weight of colored pigment, and 1 to 20% by weight of filler based on 100% by weight of the material. %, And 5 to 40% by weight of one or more of water, methyl alcohol, ethyl alcohol, Silica used in the powder is a flooring composition comprising 1 to 5% by weight of fine silica of the plate-like structure and 5 to 15% by weight of the spherical silica. The flooring composition of claim 1, wherein the polyurethane base, the curing agent, and the powder are mixed in a weight ratio of 1: 0.5 to 1.5: 1 to 10. delete The flooring composition according to claim 1, wherein the polyurethane curing agent comprises 90 to 99.1 wt% of isocyanates and 0.1 to 10 wt% of a latent curing agent. The flooring composition of claim 1, wherein the powder comprises 5 to 80% by weight of cement, 10 to 80% by weight of silica, and 1 to 40% by weight of slaked lime.       The flooring composition of claim 1, wherein the polyoxyethylene glycol has a weight average molecular weight of 200 to 1000 and an average OH functional number is one or two.       The flooring composition of claim 1, wherein the polyester polyol is a natural oil-modified polyester polyol, having a hydroxyl group of 50 to 250 and an acid value of 1 or less, and an average number of functional groups of 2 to 4.       The flooring composition of claim 1, wherein the filler comprises at least one hydrophobic amorphous silica selected from the group consisting of calcium carbonate, quicklime, calcium hydrogen carbonate, talc, and silica.       The flooring composition according to claim 8, wherein the content of the hydrophobic amorphous silica is 1 to 2% by weight. delete       A flooring material formed by applying the composition according to any one of claims 1, 2 and 4 to 9 on a base surface.       12. The flooring according to claim 11, wherein the flooring material includes fine roughness on the surface to suppress tire friction noise.       Removing impurities on the base surface; Claim 1, the first step of claim 2, wherein the first step of applying a composition according to any one of claims 4 to 9 with a thickness of 0.5 ~ 1mm; And A method of constructing a flooring material comprising the step of applying the composition according to any one of claims 1, 2 and 4 to 9 after the first application to a thickness of 2.5 to 4 mm. .

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