KR102465238B1 - Water-soluble paint composition for road marking with excellent wear resistance and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a water-soluble paint composition for road marking including a water-soluble acrylic emulsion and surface-modified ultra-high molecular weight polyethylene particles. Provided is a water-soluble paint composition for road marking having not only excellent abrasion resistance, water resistance, impact resistance and durability, but also excellent adhesion to asphalt and concrete road surfaces.

Description

Water-soluble paint composition for road marking with excellent wear resistance and manufacturing method thereof

The present invention relates to a water-soluble paint composition for a road surface excellent in abrasion resistance and a method for manufacturing the same.

Paints for road markings are paints used to draw traffic signs, and are divided into two-component paints, fusion paints, heating paints or water-soluble paints.

Among these, water-soluble road marking paints are installed on the road surface such as concrete or asphalt, and must be fast-setting to minimize the safety of the constructor and traffic restrictions of vehicles and pedestrians during construction. It must have excellent adhesion to the road surface, adhesion to glass beads, and abrasion resistance.

Emulsion-type coatings have less organic solvent emitted to the atmosphere than solvent-type coatings, have no fire risk, are environmentally friendly because they have very little odor, and are widely used as binders for road marking paints because they are easy for workers to handle. have.

On the other hand, as a similar prior literature thereto, Republic of Korea Patent Publication No. 10-1998192 is presented.

Republic of Korea Patent Publication No. 10-1998192 (2019.07.03)

An object of the present invention is to provide a water-soluble paint composition for road markings having excellent abrasion resistance, water resistance, impact resistance and durability as well as excellent adhesion to asphalt and concrete road surfaces.

Another object of the present invention is to provide a method for producing the water-soluble coating composition for a road surface and a method for forming a coating film for a road surface using the same.

However, the above purpose is illustrative, and the technical spirit of the present invention is not limited thereto.

One aspect of the present invention for achieving the above object relates to a water-soluble paint composition for a road surface excellent in abrasion resistance, comprising a water-soluble acrylic emulsion and ultra-high molecular weight polyethylene particles.

In one aspect, the weight average molecular weight of the ultra-high molecular weight polyethylene particles may be 1,000,000 to 10,000,000 g / mol.

In one aspect, the ultra-high molecular weight polyethylene particles may have a particle diameter of 50 to 300 μm.

In one aspect, the surface-modified ultra-high molecular weight polyethylene particles may be modified with a surface modifier containing a hydroxyl group-containing acrylic monomer and an initiator.

In one aspect, the water-soluble paint composition for a road surface may further include a water-soluble cellulose-based compound.

In addition, another aspect of the present invention relates to a method for preparing a water-soluble paint composition for a road surface excellent in abrasion resistance, comprising the step of blending a water-soluble acrylic emulsion and surface-modified ultra-high molecular weight polyethylene particles.

In addition, another aspect of the present invention comprises the steps of: a) coating a water-soluble paint composition for a road surface comprising a water-soluble acrylic emulsion and surface-modified ultra-high molecular weight polyethylene particles on the surface of the floor; b) applying glass beads on the painted surface; and c) curing.

The water-soluble paint composition for road marking according to the present invention can provide excellent abrasion resistance, water resistance and impact resistance by including ultra-high molecular weight polyethylene particles with a very large molecular weight, and has excellent compatibility with water-soluble acrylic emulsions compared to inorganic particles, resulting in improved durability It has the advantage of being able to provide

Hereinafter, the water-soluble paint composition for a road surface excellent in abrasion resistance according to the present invention and a manufacturing method thereof will be described in detail. The drawings introduced below are provided as examples so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other forms, and the drawings presented below may be exaggerated to clarify the spirit of the present invention. At this time, if there is no other definition in the technical terms and scientific terms used, it has the meaning commonly understood by those of ordinary skill in the art to which this invention belongs, and the gist of the present invention in the following description and accompanying drawings Descriptions of known functions and configurations that may be unnecessarily obscure will be omitted.

One aspect of the present invention relates to a water-soluble paint composition for a road surface comprising a water-soluble acrylic emulsion and surface-modified ultra-high molecular weight polyethylene particles.

As such, the water-soluble paint composition for a road surface according to the present invention can provide excellent abrasion resistance, water resistance and impact resistance by including surface-modified ultra-high molecular weight polyethylene particles having a very large molecular weight, and compatibility with a water-soluble acrylic emulsion compared to inorganic particles This has the advantage of being able to provide improved durability.

Hereinafter, the water-soluble paint composition for a road surface according to an embodiment of the present invention will be described in more detail.

First, in an example of the present invention, the water-soluble acrylic emulsion may be used without particular limitation as long as it is commonly used in the art. For example, it may be a homopolymer or copolymer of an acrylic monomer, and a more specific example Alkyl (meth)acrylates, such as methyl (meth)acrylate, ethyl (meth)acrylate, butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, and n-octyl (meth)acrylate; hydroxyalkyl (meth)acrylates such as hydroxyethyl (meth)acrylate, hydroxypropyl (meth)acrylate, hydroxybutyl (meth)acrylate, and hydroxyhexyl (meth)acrylate; aminoalkyl (meth)acrylates such as aminoethyl (meth)acrylate, N,N-dimethylaminoethyl (meth)acrylate, and t-butylaminoethyl (meth)acrylate; alkoxyalkyl (meth)acrylates such as methoxyethyl (meth)acrylate and ethoxyethyl (meth)acrylate; carboxyl group-containing acrylic monomers such as (meth)acrylic acid and carboxyethyl (meth)acrylate; epoxy-containing acrylic monomers such as glycidyl (meth)acrylate; glycol-based acrylic monomers such as ethylene glycol (meth)acrylate, propylene glycol (meth)acrylate, methoxyethylene glycol (meth)acrylate, and methoxypropylene glycol (meth)acrylate; It may be prepared by polymerizing any one or two or more selected from the group consisting of.

The solids weight of the water-soluble acrylic emulsion may be 20 to 80% by weight, more preferably 30 to 70% by weight, even more preferably 40 to 60% by weight. In this range, each component may be uniformly mixed, and quick drying may be possible during painting.

In an example of the present invention, the ultra-high molecular weight polyethylene of the surface-modified ultra-high molecular weight polyethylene particles is a polyethylene having a very high molecular weight, as the name suggests, and has a very high strength while a small friction coefficient, so that it is possible to greatly improve the abrasion resistance of the coating film, In addition, it has the advantage of excellent impact resistance, chemical resistance and thermal stability. Preferably, the weight average molecular weight of the surface-modified ultra-high molecular weight polyethylene particles may be 1,000,000 to 10,000,000 g/mol, more preferably 2,000,000 to 9,000,000 g/mol, even more preferably 3,000,000 to 7,000,000 g/mol have. In this range, the surface-modified ultra-high molecular weight polyethylene particles have the best abrasion resistance and impact resistance, so that the road marking can be maintained for a long time even after the water-soluble paint composition for road marking is painted on the road surface.

In this case, the surface-modified ultra-high molecular weight polyethylene particles may be modified with a surface modifier containing a hydroxyl group-containing acrylic monomer and an initiator. As such, by polymerizing and coating the hydroxyl group-containing acrylic monomer on the surface of the ultra-high molecular weight polyethylene particles, compatibility with the water-soluble acrylic emulsion can be further improved, and the detachment of the particles can be more effectively prevented after the coating film is formed.

Specifically, the hydroxyl group-containing acrylic monomer is 2-hydroxyethyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) the group consisting of acrylate, 2-hydroxybutyl (meth)acrylate, 5-hydroxypentyl (meth)acrylate, 6-hydroxyhexyl (meth)acrylate, and 8-hydroxyoctyl (meth)acrylate It may be any one or two or more selected from.

The initiator may be used without particular limitation as long as it is commonly used, and specifically, for example, benzoyl peroxide, lauryl peroxide, cumene hydroperoxide, methyl ethyl ketone peroxide, t-butyl hydroperoxide, t- peroxides such as butylperoxy-2-ethylhexanoate, t-hexylperoxy-2-ethylhexanoate, and 1,1,3,3-tetramethylbutylperoxy-2-ethylhexanoate; azo systems such as 2,2'-azobisisobutyronitrile, 2,2'-azobis2,4-dimethylvaleronitrile, and 2,2'-azobis2-methylisobutyronitrile; and sulfates such as ammonium persulfate, potassium persulfate, sodium persulfate, ammonium bisulfate, and sodium bisulfate; may be any one or two or more selected from the group consisting of. The initiator may be added in an amount of 0.1 to 5 parts by weight, preferably 0.5 to 3 parts by weight, based on 100 parts by weight of the hydroxyl group-containing acrylic monomer.

In addition to this, the surface modifier may further include a crosslinking agent in order to improve the degree of crosslinking of the polymerization coating layer. The crosslinking agent may be a polyfunctional acrylic monomer, specifically, for example, butanediol (meth) acrylate, hexanediol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, ethylene glycol di (meth) acrylate , diethylene glycol (meth) acrylate, triethylene glycol di (meth) acrylate, pentaerythritol tetra (meth) acrylate, pentaerythritol tri (meth) acrylate and pentaerythritol di ( It may be any one or two or more selected from the group consisting of meth) acrylates. The crosslinking agent may be added in an amount of 1 to 50 parts by weight, preferably 5 to 25 parts by weight, based on 100 parts by weight of the hydroxyl group-containing acrylic monomer.

In addition, the particle diameter of the surface-modified ultra-high molecular weight polyethylene particles may be 50 to 300 ㎛, more preferably 100 to 200 ㎛. In this range, it is possible to provide excellent wear resistance and impact resistance, as well as to be uniformly mixed with a water-soluble acrylic emulsion and the like to have excellent adhesion to the road surface.

The surface-modified ultra-high molecular weight polyethylene particles may be added in an amount of 30 to 150 parts by weight based on 100 parts by weight of the water-soluble acrylic emulsion, more preferably 50 to 120 parts by weight, and even more preferably 80 to 100 parts by weight. In this range, excellent abrasion resistance and durability can be secured.

Meanwhile, the water-soluble paint composition for a road surface according to an embodiment of the present invention may further include a water-soluble cellulose-based compound. As such, by further including a water-soluble cellulose compound, the viscosity of the paint can be more easily controlled, and it is possible to provide excellent retroreflectivity by effectively preventing sedimentation of glass beads, etc. after painting, and to prevent cracks after forming the coating film This has the advantage that durability can be improved.

As the water-soluble cellulose-based compound, it is preferable to use any one or two or more hydroxyalkyl-based celluloses selected from the group consisting of hydroxymethylcellulose, hydroxyethylcellulose, methylhydroxyethylcellulose, and methylhydroxypropylcellulose. do. In addition, the weight average molecular weight of the water-soluble cellulosic compound may be 100,000 to 500,000 g/mol, more preferably 200,000 to 400,000 g/mol, and the degree of substitution of hydroxyalkyl may be 2 to 3, more preferably 2.4 to 2.8 . By satisfying this, it can be well mixed with the water-soluble acrylic emulsion.

The water-soluble cellulose-based compound may be added in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the water-soluble acrylic emulsion, more preferably 1 to 8 parts by weight, even more preferably 3 to 6 parts by weight. In this range, the viscosity control and anti-settling effect are excellent. On the other hand, when the water-soluble cellulose-based compound is added in an amount of less than 0.1 parts by weight, the anti-settling effect and the anti-cracking effect may be insignificant, and when it is added in more than 10 parts by weight, the viscosity may be excessively high and workability may be deteriorated.

Furthermore, the water-soluble paint composition for road marking according to an embodiment of the present invention may further include a component added to a conventional water-soluble paint for road marking, that is, two types of paint for road marking, specifically, for example, a color pigment and It may further include a body pigment.

In one embodiment of the present invention, the coloring pigment is added to realize the color of the paint and to impart coloring and hiding power, and as long as it is commonly used in the art, it can be used without particular limitation, and it can be used for the purpose of a road sign. You can adjust the color differently depending on your needs. As a specific example, the colored pigment may be any one or two or more selected from the group consisting of titanium dioxide, red iron oxide, yellow iron oxide, purple iron oxide, black iron oxide, chromium oxide (Cr ₂ O ₃ ), carbon black and whiskers, and the like. , but is not limited thereto.

The color pigment may be added in an amount of 10 to 70 parts by weight, more preferably 15 to 50 parts by weight, even more preferably 20 to 35 parts by weight based on 100 parts by weight of the water-soluble acrylic emulsion. In such a range, the effect of imparting coloring and hiding power is excellent. On the other hand, when the amount of the coloring pigment is added in less than 10 parts by weight, the coloring and hiding power may be lowered, and when it is added in more than 70 parts by weight, the adhesion of the paint composition may be reduced, and the viscosity may increase and workability may be deteriorated.

In one embodiment of the present invention, the extender pigment is for controlling the fluidity, viscosity, etc. of the coating composition for road marking, and for controlling the hardness and abrasion resistance of the coating film after painting. can be used without Specifically, for example, it may be any one or two or more selected from the group consisting of calcium carbonate, talc, silica sand, mica and kaolin, but is not limited thereto.

The extender may be added in an amount of 20 to 200 parts by weight, more preferably 30 to 150 parts by weight, even more preferably 50 to 100 parts by weight based on 100 parts by weight of the water-soluble acrylic emulsion. On the other hand, when the extender pigment is added in an amount of less than 20 parts by weight, the paintability may be deteriorated due to high fluidity and low viscosity. , the viscosity may increase and workability may decrease.

In addition, any one or two or more additives selected from the group consisting of a quick-drying agent, an antifoaming agent, a surfactant, a plasticizer, an antifreeze agent, a water-soluble wax and a dispersant, etc. The level may be adjusted, specifically, for example, may be added in an amount of 0.01 to 20 parts by weight based on 100 parts by weight of the water-soluble acrylic emulsion, but is not necessarily limited thereto.

In addition, another aspect of the present invention relates to a method for producing a water-soluble paint composition for a road surface excellent in abrasion resistance, comprising the step of blending a water-soluble acrylic emulsion and surface-modified ultra-high molecular weight polyethylene particles, wherein the water-soluble Since the components and contents of the coating composition are the same as those described above, redundant descriptions are omitted, and the formulation may be performed according to a method commonly used in the art.

Meanwhile, as described above, the surface-modified ultra-high molecular weight polyethylene particles according to an embodiment of the present invention may be modified with a surface modifier containing a hydroxyl group-containing acrylic monomer and an initiator, and in this case, the surface modifier is the same as described above. A duplicate description will be omitted.

The surface modification method of ultra-high molecular weight polyethylene particles may be accomplished by stirring 200 to 500 parts by weight of ultra high molecular weight polyethylene particles to the surface modifier (based on 100 parts by weight of hydroxyl group-containing acrylic monomer) at a temperature of 100 to 130° C. for 6 to 48 hours. have.

In addition, another aspect of the present invention comprises the steps of: a) coating a water-soluble paint composition for a road surface comprising a water-soluble acrylic emulsion and surface-modified ultra-high molecular weight polyethylene particles on the surface of the floor; b) applying glass beads on the painted surface; and c) curing. Again, since the components and contents of the water-soluble paint composition for road marking are the same as those described above, redundant descriptions are omitted, and painting and curing may be performed according to methods commonly used in the art.

Hereinafter, the water-soluble paint composition for a road surface excellent in abrasion resistance according to the present invention and a manufacturing method thereof will be described in more detail through Examples. However, the following examples are only a reference for describing the present invention in detail, and the present invention is not limited thereto, and may be implemented in various forms.

Also, unless otherwise defined, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of effectively describing particular embodiments only and is not intended to limit the invention. In addition, the unit of additives not specifically described in the specification may be weight %.

[Production Example 1]

150 g of ultra-high molecular weight polyethylene particles (Mw 5,500,000 g/mol, density 0.93 g/cm 3 , particle size 125 μm) in a mixed solvent of 450 ml of ethanol and 50 ml of distilled water, 50 g of 3-hydroxypropyl (meth)acrylate, 5 g of trimethylolpropane tri(meth)acrylate and 1 g of benzoyl peroxide were added and polymerized at a temperature of 110° C. for 3 to 20 hours to prepare surface-modified ultra-high molecular weight polyethylene particles.

[Production Example 2]

All processes were performed in the same manner as in Preparation Example 1 except that ultra-high molecular weight polyethylene particles having a weight average molecular weight of 500,000 g/mol (density 0.93 g/cm 3 , particle diameter 125 μm) were used to prepare surface-modified ultra-high molecular weight polyethylene particles.

[Production Example 3]

Surface-modified ultra-high molecular weight polyethylene particles were prepared by proceeding in the same manner as in Preparation Example 1 except that ultra-high molecular weight polyethylene particles having a weight average molecular weight of 1,000,000 g/mol (density 0.93 g/cm 3 , particle diameter 125 μm) were used.

[Production Example 4]

All processes were performed in the same manner as in Preparation Example 1 except that ultra-high molecular weight polyethylene particles having a weight average molecular weight of 2,500,000 g/mol (density 0.93 g/cm 3 , particle diameter 125 μm) were used to prepare surface-modified ultra-high molecular weight polyethylene particles.

[Production Example 5]

All procedures were performed in the same manner as in Preparation Example 1 except that ultra-high molecular weight polyethylene particles having a weight average molecular weight of 7,000,000 g/mol (density 0.93 g/cm 3 , particle diameter 125 μm) were used to prepare surface-modified ultra-high molecular weight polyethylene particles.

[Example 1]

Based on 100 parts by weight of a water-soluble acrylic emulsion (solid content 50.5% by weight, density (wet) 1.05 g/ml, Tg 28° C., Brookfield viscosity (60 rpm, 25° C.) less than 100 cps), the surface modification prepared in Preparation Example 1 30 parts by weight of ultra-high molecular weight polyethylene particles (UHMWPE), hydroxyethyl cellulose (MHEC, Mw 300,000 g/mol, hydroxyethyl substitution degree 2.5) 5 parts by weight, coloring pigment (TiO ₂ ) 25 parts by weight, extender pigment (CaCO) ₃ ) 80 parts by weight, 10 parts by weight of ethanol, 2 parts by weight of surfactant, 2 parts by weight of an antifoaming agent, 3 parts by weight of a dispersant and 10 parts by weight of a plasticizer were mixed to prepare a coating composition.

[Examples 2 to 6]

All processes were carried out in the same manner as in Example 1, except that the content of the surface-modified ultra-high molecular weight polyethylene particles prepared in Preparation Example 1 was adjusted differently.

[Examples 7 to 10]

All procedures were performed in the same manner as in Example 1 except that the weight average molecular weight of the surface-modified ultra-high molecular weight polyethylene particles was changed.

(Example 7-Preparation Example 2/Example 8-Preparation Example 3/Example 9-Preparation Example 4/Example 10-Preparation Example 5)

[Comparative Example 1]

All processes were performed in the same manner as in Example 3 except that surface-modified ultra-high molecular weight polyethylene particles (UHMWPE) were not added.

[Comparative Example 2]

All procedures were performed in the same manner as in Example 3 except that hydroxyethyl cellulose (MHEC) was not added.

parts by weight acryl
emulsion UHMWPE MHEC color pigment body pigment ethanol Mw (×10 ⁴ g/mol) parts by weight Example 1 100 550 30 5 25 80 10 Example 2 100 550 50 5 25 80 10 Example 3 100 550 80 5 25 80 10 Example 4 100 550 100 5 25 80 10 Example 5 100 550 120 5 25 80 10 Example 6 100 550 150 5 25 80 10 Example 7 100 50 80 5 25 80 10 Example 8 100 100 80 5 25 80 10 Example 9 100 250 80 5 25 80 10 Example 10 100 700 80 5 25 80 10 Comparative Example 1 100 - - 5 25 80 10 Comparative Example 2 100 550 80 - 25 80 10

[Characteristic evaluation]

In accordance with the Korean Industrial Standard KS M 6080 (road marking road), the coating compositions prepared according to Examples 1 to 10 and Comparative Examples 1 and 2 were coated on the surface to be coated, and glass beads (average particle diameter of 1 mm) were applied. ) was applied to form a coating film. As an evaluation of wheel load abrasion resistance, the retroreflectivity of the dry road surface according to the traffic volume from 200,000 to 2 million times was evaluated according to KS M 6080:2014, and the results are shown in Table 2 below.

Retroreflectivity, mcd/(㎡·lx) Early 200,000 times 500,000 times 1 million times 2 million times Example 1 442 423 401 371 331 Example 2 437 420 400 375 339 Example 3 453 439 424 408 394 Example 4 446 433 419 404 388 Example 5 439 427 413 392 347 Example 6 448 436 421 399 343 Example 7 446 407 361 291 172 Example 8 451 429 408 365 332 Example 9 440 425 406 389 366 Example 10 448 436 422 404 392 Comparative Example 1 444 402 355 285 159 Comparative Example 2 417 383 327 259 146

Referring to Tables 1 and 2, in the case of the coating compositions of Examples 1 to 6 in which ultra-high molecular weight polyethylene particles having a weight average molecular weight of 5 million g/mol were added, 80 to 100 parts by weight compared to 100 parts by weight of the water-soluble acrylic emulsion. Abrasion resistance was the best when modified ultra-high molecular weight polyethylene particles were added. When the amount added was smaller than this, the effect of improving the abrasion resistance was smaller than in Example 3, and when the amount was added in excess, the adhesive force was slightly lowered, and as the traffic volume increased, the retroreflectivity was further decreased. On the other hand, in the case of the paint composition to which the surface-modified ultra-high molecular weight polyethylene particles were not added, the abrasion resistance was greatly decreased, and it was confirmed that the retroreflectivity according to the traffic volume was gradually decreased.

In addition, in the case of Examples 3 and 7 to 10, in which the molecular weight of the polyethylene particles were different, the abrasion resistance improvement effect was exhibited only when the weight average molecular weight was 1 million or more, and it was particularly excellent when the weight average molecular weight was 1 million or more. showed wear resistance.

Furthermore, in the case of Comparative Example 2 in which hydroxyethyl cellulose was not added, the anti-settling effect was inferior, and the initial retroreflectivity was lower than in Example, and it was confirmed that the retroreflectivity also gradually decreased significantly as the traffic volume increased.

Although the present invention has been described through specific matters and limited examples as described above, these are only provided to help a more general understanding of the present invention, and the present invention is not limited to the above examples, and the present invention pertains to Various modifications and variations are possible from these descriptions by those of ordinary skill in the art.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and not only the claims described below, but also all those with equivalent or equivalent modifications to the claims will be said to belong to the scope of the spirit of the present invention. .

Claims (7)

A composition comprising a water-soluble acrylic emulsion, a water-soluble cellulose compound, and surface-modified ultra-high molecular weight polyethylene particles,
The surface-modified ultra-high molecular weight polyethylene particles are added in an amount of 50 to 120 parts by weight based on 100 parts by weight of the water-soluble acrylic emulsion, modified with a surface modifier containing a hydroxyl group-containing acrylic monomer and an initiator,
The weight average molecular weight of the ultra-high molecular weight polyethylene particles is 1,000,000 to 10,000,000 g / mol, a water-soluble paint composition for a road surface excellent abrasion resistance.
delete The method of claim 1,
The surface-modified ultra-high molecular weight polyethylene particles have a particle diameter of 50 to 300 μm, and a water-soluble paint composition for a road sign having excellent abrasion resistance.
delete delete Including; mixing the water-soluble acrylic emulsion, the water-soluble cellulose-based compound and the surface-modified ultra-high molecular weight polyethylene particles;
The surface-modified ultra-high molecular weight polyethylene particles are added in an amount of 50 to 120 parts by weight based on 100 parts by weight of the water-soluble acrylic emulsion, modified with a surface modifier containing a hydroxyl group-containing acrylic monomer and an initiator,
A method for producing a water-soluble paint composition for a road surface excellent in abrasion resistance, wherein the weight average molecular weight of the ultra-high molecular weight polyethylene particles is 1,000,000 to 10,000,000 g/mol.
a) coating the surface of the floor surface with a water-soluble paint composition for road markings comprising a water-soluble acrylic emulsion, a water-soluble cellulose compound, and surface-modified ultra-high molecular weight polyethylene particles;
b) applying glass beads on the painted surface; and
c) curing;
The surface-modified ultra-high molecular weight polyethylene particles are added in an amount of 50 to 120 parts by weight based on 100 parts by weight of the water-soluble acrylic emulsion, modified with a surface modifier containing a hydroxyl group-containing acrylic monomer and an initiator,
The weight average molecular weight of the ultra-high molecular weight polyethylene particles is 1,000,000 to 10,000,000 g / mol, a method of forming a coating film for a road surface excellent abrasion resistance.