KR102112309B1 - A room temperature curing paint composition with fast drying rate - Google Patents

Abstract

The present invention relates to a two-component acrylic paint composition which is fast in drying speed, excellent in abrasion resistance, adhesion, thermal stability, impact resistance and water resistance, and is environmentally friendly and, more specifically, to a two-component acrylic paint composition comprising: a first composition including an acrylic resin, calcium carbonate, titanium dioxide, a dispersant, polystyrene hollow particles and a film forming agent; and a second composition including a curing accelerator.

Description

A room temperature curing paint composition with fast drying rate

The present invention relates to a fast drying speed, excellent abrasion resistance, adhesion, thermal stability, impact resistance and water resistance, and an environmentally friendly two-component acrylic coating composition, more specifically acrylic resin, calcium carbonate, titanium dioxide, dispersant, A first composition comprising polystyrene hollow particles and a film-forming agent; And it relates to a two-component acrylic coating composition comprising a second composition containing a curing accelerator.

When the coating film prepared from the coating is exposed to ultraviolet rays or heat for a long time, the polymer chains constituting the coating film are crushed and the properties of the coating film are deteriorated.

Meanwhile, as regulations on the environment have been strengthened, regulations on the release of volatile organic compounds have become strict in the fields of paints, coatings, and adhesives.

Therefore, even if it is exposed to ultraviolet rays or heat for a long time, the properties of the coating film are maintained and the demand for a water-soluble coating material having a low content of volatile organic compounds is rapidly increasing.

However, the water-soluble paint has a disadvantage in that the drying speed is slower than that of the solvent-type paint, so it takes a long time to construct, and the water resistance and abrasion resistance are lowered, which is fatal in terms of reliability.

In this regard, Korean Registered Patent No. 10-1558876 discloses a water-soluble road surface coating composition comprising an acrylate or methacrylate repeating unit, an acrylic resin crosslinked by a curing agent, a colored pigment, and a constitutional pigment. have.

However, the coating composition disclosed in the above document has a slow drying rate, and still has poor wear resistance, adhesion, thermal stability, impact resistance and water resistance.

Korean Registered Patent No. 10-1558876 (2015.10.02.)

The present invention is to solve the problems of the prior art, the drying speed is fast, abrasion resistance, adhesion, thermal stability, impact resistance and water resistance is excellent, it is an object to provide an environmentally friendly two-component acrylic coating composition.

In addition, an object of the present invention is to provide a two-component acrylic coating composition capable of improving abrasion resistance and retroreflective brightness by increasing adhesion to asphalt, asphalt, and glass beads.

In order to achieve the above object, the present invention is a first composition comprising an acrylic resin, calcium carbonate, titanium dioxide, a dispersing agent, polystyrene hollow particles and a film forming agent; And it provides a two-component acrylic coating composition comprising a second composition containing a curing accelerator.

In one embodiment of the present invention, the first composition is 50 to 200 parts by weight of calcium carbonate, 10 to 50 parts by weight of titanium dioxide, 0.1 to 5 parts by weight of dispersant, and 5 to 30 polystyrene hollow particles based on 100 parts by weight of acrylic resin Characterized in that it comprises 1 to 20 parts by weight of the weight and film forming aids.

In one embodiment of the present invention, the second composition is characterized in that it contains 2 to 20 parts by weight of the curing accelerator relative to 100 parts by weight of the acrylic resin.

In one embodiment of the present invention, the first composition is characterized in that it further comprises 1 to 10 parts by weight of amine polymer and 0.5 to 5 parts by weight of basic compound relative to 100 parts by weight of acrylic resin.

In one embodiment of the present invention, the first composition is characterized in that it further comprises 1 to 10 parts by weight of a copolymer of an acrylate group-containing silane coupling agent and an acrylic acid monomer relative to 100 parts by weight of an acrylic resin.

In one embodiment of the present invention, the second composition is characterized in that it further comprises 1 to 10 parts by weight of a copolymer of an acrylate group-containing silane coupling agent and an acrylic acid monomer relative to 100 parts by weight of the acrylic resin.

The present invention can provide an eco-friendly two-component acrylic coating composition having a fast drying speed, excellent abrasion resistance, adhesion, thermal stability, impact resistance and water resistance, and low volatile organic compound content.

In addition, the present invention can provide a two-component acrylic coating composition that can improve the abrasion resistance and retroreflective brightness by increasing the adhesion to asphalt, asphalt and glass beads.

Hereinafter, the present invention will be described in detail based on examples. The terms, examples, and the like used in the present invention are merely exemplified in order to explain the present invention in more detail and help a person skilled in the art understand, and the scope of the present invention should not be interpreted as being limited thereto.

Technical terms and scientific terms used in the present invention, unless otherwise defined, refer to meanings commonly understood by those skilled in the art to which this invention belongs.

The present invention is an acrylic resin, calcium carbonate, titanium dioxide, dispersing agent, polystyrene hollow particles and a first composition comprising a film forming agent; And it relates to a two-component acrylic coating composition comprising a second composition containing a curing accelerator.

The first composition and the second composition are stored in separate containers, and are mixed and used during or just before applying the coating composition.

The first composition is 50 to 200 parts by weight of calcium carbonate, 10 to 50 parts by weight of titanium dioxide, 0.1 to 5 parts by weight of dispersant, 5 to 30 parts by weight of hollow polystyrene particles and 1 to 20 parts by weight of film forming agent relative to 100 parts by weight of acrylic resin It may contain wealth.

The acrylic resin serves to increase the surface hardness of the coating film and impart adhesion to the substrate, abrasion resistance, impact resistance, water resistance, and weather resistance.

The acrylic resin is not particularly limited as long as it is a polymer having an acrylic group in the molecule, and can be produced by polymerizing an acrylic monomer or by copolymerizing an acrylic monomer with another monomer.

The acrylic resin may be a solid acrylic resin or an acrylic resin emulsion may be used, and it is preferable that an acrylic resin emulsion is used, and the content of the solids contained in the acrylic resin emulsion is preferably 20 to 60% by weight.

The acrylic resin may be polymerized by emulsion polymerization, or may be an anionic acrylic resin imparted with anions. To prepare the anionic acrylic resin, anionic surfactants or anionic dispersants may be added during the emulsion polymerization of the acrylic resin, or anionic surfactants or anionic dispersants may be added after the emulsion polymerization of the acrylic resin.

Examples of the anionic surfactant or anionic dispersant include sulfate; Sulfonate; phosphate; Salts of fatty acid rosin and naphthenic acid; Concentrated products of naphthalene sulfonic acid and low molecular weight formaldehyde; Metal alkyl sulfates such as sodium lauryl sulfate; Salts such as dodecylbenzene sulfonic acid and isopropylbenzene sulfonic acid; Salts of alkyl aryl sulfonic acids such as isopropylnaphthalene sulfonic acid; Salts of alkyl succosuccinic acids such as dioctyl sulfosuccinic acid, sulfosuccinic acid, octyl sulfosuccinic acid, N-methyl-N-palmitoyl tauric acid, oleylethionic acid, and the like; Metal salts of alkylarylpolyethoxyethyl sulfuric acid, such as sodium t-octylphenoxy-polyethoxyethyl sulfate, and the like can be used.

The acrylic monomer used in the preparation of the acrylic resin is methyl acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, n-amyl acrylate, isoamyl acrylate, n-hexyl acrylate, 2-ethylhexyl acrylate, hydroxymethyl acrylate, 2-hydroxyethyl acrylate, hydroxypropyl acrylate, lauryl acrylate, methyl methacrylate, ethyl methacrylate, propyl meta Acrylate, isopropyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, n-amyl methacrylate, isoamyl methacrylate, n-hexyl methacrylate, 2-ethylhexyl methacrylate, Hydroxymethyl methacrylate, hydroxypropyl methacrylate, lauryl methacrylate, acrylic acid, methacrylic acid, methyl acrylic acid, ethyl acrylic acid, butyl acrylic acid, 2-ethyl hexyl acrylic acid, decyl acrylic acid, methyl methacrylic acid, ethyl And methacrylic acid, butyl methacrylic acid, 2-ethyl hexyl methacrylic acid, and decyl methacrylic acid.

The calcium carbonate can be used to improve the wear resistance and durability of the coating composition.

The content of the calcium carbonate is preferably 50 to 200 parts by weight based on 100 parts by weight of the acrylic resin, and when the content is less than 50 parts by weight, abrasion resistance and durability decrease, and when it exceeds 200 parts by weight, workability and impact resistance decrease.

The first composition may include titanium dioxide in order to improve whiteness and wear resistance.

The content of the titanium dioxide is preferably 10 to 50 parts by weight with respect to 100 parts by weight of the acrylic resin, and if the content is less than 10 parts by weight, the whiteness and abrasion resistance decreases, and if it exceeds 50 parts by weight, the impact resistance of the coating film decreases rather. Prices rise a lot.

The titanium dioxide may be surface treated with an acrylate group-containing silane coupling agent.

The acrylate group introduced on the surface of the titanium dioxide can improve the adhesive properties with the acrylic resin, thereby improving the durability, water resistance and abrasion resistance of the composition.

The content of the silane coupling agent is preferably 1 to 10 parts by weight with respect to 100 parts by weight of titanium dioxide, the wear resistance of the composition can be maximized in the numerical range.

The dispersant is used to improve the dispersing properties of the composition and to reduce the yellowness, polyammonium ammonium salt, polycarboxylic acid sodium salt, and the like can be used. The polycarboxylic acid ammonium salt or polycarboxylic acid sodium salt can be prepared by reacting polycarboxylic acid with ammonia water or sodium chloride. At this time, the solid content of the polycarboxylic acid ammonium salt or polycarboxylic acid sodium salt is preferably 20 to 60% by weight.

Examples of the polycarboxylic acid include polyacrylic acid, polymethacrylic acid, polyacrylic acid copolymer, and polymethacrylic acid copolymer.

The content of the dispersant is preferably 0.1 to 5 parts by weight based on 100 parts by weight of the acrylic resin, and if the content is less than 0.1 parts by weight, dispersibility is reduced, and if the content exceeds 5 parts by weight, durability and abrasion resistance may be reduced.

In the present invention, as the dispersant, an ammonium polyacrylate salt and an ammonium polymethacrylate salt may be used at the same time, and the weight ratio of the ammonium polyacrylate salt and the ammonium polymethacrylate salt is preferably 60 to 80:20 to 40.

The polystyrene hollow particles may induce diffuse reflection of the composition and improve whiteness, and increase the drying rate by absorbing water present in the composition.

The content of the hollow polystyrene particles is preferably 5 to 30 parts by weight with respect to 100 parts by weight of the acrylic resin, and if the content is less than 5 parts by weight, the whiteness decreases, and if the content exceeds 30 parts by weight, durability and wear resistance may decrease. .

The film-forming agent may improve the compactness, wettability and adhesion of the coating film, and 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate (Texanol), diethylene glycol monobutyl ether, ethylene glycol mono Ether and the like can be used.

The content of the film forming aid is preferably 1 to 20 parts by weight with respect to 100 parts by weight of the acrylic resin, and when the content is less than 1 part by weight, the coating property is lowered, and when it exceeds 20 parts by weight, the drying rate is slowed.

In addition, the first composition may further include 1 to 10 parts by weight of the amine polymer and 0.5 to 5 parts by weight of the basic compound with respect to 100 parts by weight of the acrylic resin.

The amine polymer forms a cross-link with the acrylic resin to increase the drying rate by densifying the curing structure, and serves to improve abrasion resistance, heat resistance, and water resistance.

Examples of the amine-based monomer used in the preparation of the amine polymer include β-aminoethyl vinyl ether; β-aminoethyl vinyl sulfide; N-monomethyl-β-aminoethyl vinyl ether or sulfide; N-monoethyl-β-aminoethyl vinyl ether or sulfide; N-monobutyl-β-aminoethyl vinyl ether or sulfide; N-monoketyl-3-aminopropyl vinyl ether or sulfide; Dimethylaminoethyl acrylic acid or methacrylic acid; β-aminoethyl acrylic acid or methacrylic acid; N-β-aminoethyl acrylamide or methacrylamide; N-(monomethylaminoethyl)-acrylamide or methacrylamide; N-(mono-n-butyl)-4-aminobutyl acrylic acid or methacrylic acid; Methacryloxyethoxyethylamine; Acryloxypropoxypropoxypropylamine; Oxazolidinylethyl methacrylic acid; Oxazolidinylethyl acrylic acid; 3-(r-methacryloxypropyl)-tetrahydro-1,3-oxazine; 3-(β-methacryloxyethyl)-2,2-pentamethylene-oxazolidine; 3-(β-methacryloxyethyl-2-methyl-2-propyloxazolidine; N-2-(2-acryloxyethoxy)ethyl-oxazolidine; N-2-(2-methacryloxye Methoxy)ethyl-oxazolidine; N-2-(2-methacryloxyethoxy)ethyl-5-methyl-oxazolidine; N-2-(2-acryloxyethoxy)ethyl-5-methyl-oxa Zolidine; 3-[2-(2-methacryloxyethoxy)ethyl]-2,2-penta-methylene-oxazolidine; 3-[2-(2-methacryloxyethoxy)ethyl]-2 -2-dimethyloxazolidine; 3-[2-(2-methacryloxyethoxy)ethyl]-2-phenyl-oxazolidine; 2-[4-(2,6-dimethylheptylidene)-amino ]-Ethyl methacrylic acid; 3-[2-(4-methylpentylidene)-amino]-propyl methacrylic acid; β-(benzylideneamino)-ethyl methacrylic acid; 3-[2-(4-methylpentyl) Den)-amino]-ethyl methacrylic acid; 2-[4-(2,6-dimethylheptylidene)-amino]-ethyl acrylic acid; 12-(cyclopentylidene-amino)-dodecyl methacrylic acid; N- (1,3-dimethylbutylidene)-2-(2-methacryloxyethoxy)-ethylamine; N-(benzylidene)-methacryloxyethoxyethylamine; N-(1,3-dimethyl part Thiliden)-2-(2-acryloxyethoxy)-ethylamine; N-(benzylidene)-2-(2-acryloxyethoxy)ethylamine and the like can be used.

The amine polymer is preferably used in an amount of 1 to 10 parts by weight based on 100 parts by weight of the acrylic resin, and when the content is less than 1 part by weight, abrasion resistance, durability and water resistance decrease, and when it exceeds 10 parts by weight, the flexibility of the coating film decreases rather do.

The basic compound increases the pH of the coating composition, and keeps the amine polymer contained in the composition in a non-ionic state, so that there is no bond between the acrylic resin and the amine polymer in the state where the composition is stored, so the composition is in a stable state. Can be maintained.

When the composition is applied to the road surface, the basic compound is highly volatile and volatilizes immediately upon application, so that the pH of the composition decreases. As a result, the amine polymer is converted into a cationic amine polymer by binding to a proton contained in the composition.

The cationic amine polymer may improve abrasion resistance, heat resistance, durability, and water resistance of the coating film by forming a strong crosslink with the anionic acrylic resin.

Therefore, when the coating composition is applied to the road surface, rapid evaporation of the basic compound occurs and strong crosslinking between the cationic amine polymer and the anionic acrylic resin leads to a fast drying rate and compactness of the curing structure, thereby providing abrasion resistance, heat resistance, and water resistance. , Durability, etc. are improved.

The basic compound may be ammonia, ammonia water, morpholine, alkyl amine, 2-dimethylaminoethanol, N-methyl morpholine, ethylene diamine, ethanol, methanol, and the like.

It is preferable that the basic compound is used in an amount of 0.5 to 5 parts by weight based on 100 parts by weight of the acrylic resin, and when the content is less than 0.5 parts by weight, crosslinking with the acrylic resin cannot be formed, thereby reducing wear resistance, durability and water resistance, 5 When it exceeds the weight part, the drying speed is lowered.

In addition, the first composition may further include 1 to 10 parts by weight of a copolymer of an acrylate group-containing silane coupling agent and an acrylic acid monomer relative to 100 parts by weight of the acrylic resin.

A number of carboxyl groups included in the copolymer can improve adhesion of components in the composition, and improve abrasion resistance, heat resistance and water resistance.

The acrylate group-containing silane coupling agent is 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldiethoxysilane, 3-methacryloxypropyltri Ethoxysilane, 3-acryloxypropyl trimethoxysilane, methacryloxymethyl triethoxysilane, and methacryloxymethyl trimethoxysilane.

The acrylic acid monomer is acrylic acid, methacrylic acid, methyl acrylic acid, ethyl acrylic acid, butyl acrylic acid, 2-ethyl hexyl acrylic acid, decyl acrylic acid, methyl methacrylic acid, ethyl methacrylic acid, butyl methacrylic acid, 2-ethyl hexyl methacrylic acid , Decyl methacrylic acid, and the like.

The weight ratio of the acrylate group-containing silane coupling agent and the acrylic acid monomer is preferably 10 to 30:70 to 90, and abrasion resistance, water resistance, and heat resistance of the composition may be maximized in the numerical range.

The copolymer of the acrylate group-containing silane coupling agent and the acrylic acid monomer is used in an amount of 1 to 10 parts by weight based on 100 parts by weight of the acrylic resin, and when the content is less than 1 part by weight, the effect of addition is minimal, and when it exceeds 10 parts by weight The drying speed of the coating film is lowered.

In addition, the first composition may further include a copolymer of an unsaturated monomer containing a carboxyl group and an unsaturated monomer containing an epoxy group.

The unsaturated monomer containing a carboxyl group includes a vinyl aromatic monomer containing a carboxyl group; Acrylate-based monomers containing a carboxyl group; Vinyl cyanide-based monomers containing a carboxyl group; Vinyl halide-based monomers including a carboxyl group may be used.

The unsaturated monomer containing the epoxy group is a vinyl aromatic monomer containing an epoxy group; Acrylate-based monomers containing an epoxy group; Vinyl cyanide-based monomers containing an epoxy group; Vinyl halide-based monomers including an epoxy group may be used.

The weight ratio of the unsaturated monomer containing the carboxyl group and the unsaturated monomer containing the epoxy group is preferably 70 to 90:10 to 30.

The content of the copolymer of the unsaturated monomer containing the carboxyl group and the unsaturated monomer containing the epoxy group is preferably 1 to 10 parts by weight based on 100 parts by weight of the acrylic resin, and when the content of the copolymer is less than 1 part by weight, the effect of addition When it is insignificant and exceeds 10 parts by weight, the drying speed is lowered.

In addition, the first composition may further include an antifoaming agent and a surfactant, and the antifoaming agent includes mineral oil, turpentine oil, higher fatty acid, higher alcohol, polyethylene glycol dilaurate, polyethylene glycol monooleate, polyethylene glycol dioleate, Polyethylene glycol monoricinoleate, polyethylene glycol monostearate, polyoxypropylene oleate butyl ether, polyoxypropylene stearate butyl ether, and the like can be used.

As the surfactant, conventional cationic surfactants, anionic surfactants, and nonionic surfactants can be used without limitation.

In addition, the second composition may include a curing accelerator, and the curing accelerator may increase the drying rate of the coating composition by absorbing water through covalent bonding, coordination bonding, physical adsorption, and chemical adsorption.

The curing accelerator includes cationic polymers, anionic polymers, mixtures of cationic and anionic polymers, chelating polymers, and the like.

It is preferable that the shape of the curing accelerator is a solid such as particles, powders or beads.

Anionic polymers include sulfonated phenol formaldehyde condensate, sulfonated phenol-benzaldehyde condensate, sulfonated polystyrene, sulfonated ethylstyrene polymer, sulfonated divinylbenzene polymer, sulfonated styrene-divinylbenzene Copolymers, sulfonated methacrylic acid-divinylbenzene copolymers, polymers containing sulfonic acid groups, polymers containing carboxyl groups, polymers containing iminodiacetate groups, polymers containing phosphonic acid groups, and the like.

The anionic polymer may include H ⁺ , NH ₄ ⁺ , and alkali metal ions (K ⁺ , Na ^+, etc.).

The cationic polymer may include styrene-divinylbenzene copolymer substituted with tetramethylammonium hydroxide.

The chelating polymer is polystyrene, polyacrylic acid, polyamine on the polyethylenimine skeleton, thiourea on the polystyrene skeleton, guanidine on the polystyrene skeleton, dithiocarbamate on the polyethylenimine skeleton, hydroxamic acid on the polyacrylate skeleton, mer on the polystyrene skeleton Capto, etc. may be included.

The content of the curing accelerator is preferably 2 to 20 parts by weight based on 100 parts by weight of the acrylic resin, and when the content of the curing accelerator is less than 2 parts by weight, the drying speed decreases, and when it exceeds 20 parts by weight, durability and abrasion resistance decrease. .

In addition, the second composition is an acrylic acid monomer (acrylic acid, methacrylic acid, etc.) and an ionic monomer (2-methacryloyloxyethyl trimethylammonium, 2-acrylamido-2-methylpropane sulfonate, 2-) as a curing accelerator. Methacryloyloxyethane sulfonate, vinyl sulfonate, styrene sulfonate, and the like).

For example, the present invention can simultaneously use an anionic polymer and a copolymer of an acrylic acid monomer-ionic monomer as a curing accelerator. At this time, the weight ratio of the copolymer of the anionic polymer and the acrylic acid monomer-ionic monomer is preferably 60 to 80:20 to 40.

In addition, the second composition may further include 1 to 10 parts by weight of a copolymer of an acrylate group-containing silane coupling agent and an acrylic acid monomer relative to 100 parts by weight of the acrylic resin.

A number of carboxyl groups included in the copolymer may improve adhesion of components in the composition, and improve drying speed, abrasion resistance, heat resistance and water resistance.

The acrylate group-containing silane coupling agent is 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropylmethyldiethoxysilane, 3-methacryloxypropyltri Ethoxysilane, 3-acryloxypropyl trimethoxysilane, methacryloxymethyl triethoxysilane, and methacryloxymethyl trimethoxysilane.

The acrylic acid monomer is acrylic acid, methacrylic acid, methyl acrylic acid, ethyl acrylic acid, butyl acrylic acid, 2-ethyl hexyl acrylic acid, decyl acrylic acid, methyl methacrylic acid, ethyl methacrylic acid, butyl methacrylic acid, 2-ethyl hexyl methacrylic acid , Decyl methacrylic acid, and the like.

The weight ratio of the acrylate group-containing silane coupling agent and the acrylic acid monomer is preferably 10 to 30:70 to 90, and the drying speed, abrasion resistance, water resistance, and heat resistance of the composition in the numerical range can be maximized.

The copolymer of the acrylate group-containing silane coupling agent and the acrylic acid monomer is used in an amount of 1 to 10 parts by weight based on 100 parts by weight of the acrylic resin, and when the content is less than 1 part by weight, the effect of addition is minimal, and when it exceeds 10 parts by weight The drying speed of the coating film is lowered.

 The two-component acrylic coating composition of the present invention may be applied or coated on a substrate or a road surface by a known method, for example, a brush, roll coating, spray coating, spraying, impregnation, or the like.

At this time, the first composition is first coated on the substrate or the road surface to form the first coating layer, the second composition is coated on the first coating layer, or the first composition is first coated to form the first coating layer, and the first coating layer is formed on the first coating layer. The second composition is coated to form a second coating layer, and the first composition may be coated again on the second coating layer, or the first composition and the second composition may be coated simultaneously.

When the coating composition comprising the first composition and the second composition is coated, the curing accelerator increases the drying rate of the coating composition by absorbing water present in the coating composition through covalent bonding, coordination bonding, physical adsorption, chemical adsorption, etc. I can do it.

Hereinafter, the present invention will be described in detail through examples and comparative examples. The following examples are only exemplified for the practice of the present invention, and the contents of the present invention are not limited by the following examples.

(Example 1)

100 parts by weight of polymethyl methacrylate emulsion resin (48% by weight of solids), 150 parts by weight of calcium carbonate, 30 parts by weight of titanium dioxide, 3 parts by weight of polyacrylate ammonium salt (30% by weight of solids), 10 parts by weight of hollow polystyrene particles, and The first composition was prepared by mixing 5 parts by weight of texanol.

A second composition comprising 10 parts by weight of sulfonated polystyrene beads was prepared.

A first coating layer was formed on the substrate by coating the first composition, the second composition was coated on the first coating layer to form a second coating layer, and the first composition was coated on the second coating layer to prepare a coating film.

(Example 2)

A coating film was prepared in the same manner as in Example 1, except that 2 parts by weight of the hollow polystyrene particles was used.

(Example 3)

A coating film was prepared in the same manner as in Example 1, except that 35 parts by weight of the hollow polystyrene particles was used.

(Example 4)

A coating film was prepared in the same manner as in Example 1, except that 1 part by weight of sulfonated polystyrene beads was used.

(Example 5)

A coating film was prepared in the same manner as in Example 1, except that 25 parts by weight of sulfonated polystyrene beads were used.

(Example 6)

A coating film was prepared in the same manner as in Example 1, except that a first composition was prepared by adding 3 parts by weight of a copolymer of 3-methacryloxypropyl trimethoxysilane and acrylic acid.

(Example 7)

A coating film was prepared in the same manner as in Example 1, except that a second composition was prepared by adding 3 parts by weight of a copolymer of 3-methacryloxypropyl trimethoxysilane and acrylic acid.

(Comparative Example 1)

A coating film was prepared in the same manner as in Example 1, except that the second composition was not used.

The non-stick dryness, water resistance, abrasion resistance and luminance rate of the coating films prepared from the above Examples and Comparative Examples were measured and the results are shown in Table 1 below.

Non-stick dryness was measured according to KS M 6080, and the time when the paint did not adhere to the tire of the non-stick tester was measured.

The water resistance was measured according to KS M ISO 1514, dried for 72 hours, immersed in water, left for 24 hours, then taken out and dried for 2 hours at room temperature to observe the state of the coating film. At this time, the state of the coating film was marked as excellent, excellent, normal, and poor.

Wear resistance was measured according to KS M 6080, and retroreflectivity was measured after traffic volume class P7 (4 million wheels passed). In the case of white, the wear resistance is expressed as R3≥150, R4≥200, R5≥300 according to the retroreflectivity performance (RL) in a dry state after 1 million wheels have passed.

Luminance rate was measured based on KS M 6080.

division Example Comparative example One 2 3 4 5 6 7 One Non-adhesive dryness
(minute) 5 10 10 10 10 5 5 20 Water resistance Great usually usually usually usually eminence eminence usually Wear resistance
(Dry state) P7 (4 million times) R5 R4 R4 R4 R4 R5 R5 R4 Luminance rate 90 88 87 86 85 90 90 82

From the results of Table 1, Examples 1 to 6 and 7 are excellent in non-stick dryness, water resistance, abrasion resistance and luminance ratio, and in particular, Examples 6 and 7 have the best characteristics.

On the other hand, in Comparative Example 1, it can be seen that the above characteristics are inferior to the Examples.

Claims (6)

A first composition comprising an acrylic resin, calcium carbonate, titanium dioxide, a dispersing agent, polystyrene hollow particles and a film forming agent; And
In the two-component acrylic coating composition comprising a second composition containing a curing accelerator,
The first composition is 50 to 200 parts by weight of calcium carbonate, 10 to 50 parts by weight of titanium dioxide, 0.1 to 5 parts by weight of dispersant, 5 to 30 parts by weight of hollow polystyrene particles and 1 to 20 parts by weight of film forming agent relative to 100 parts by weight of acrylic resin Including wealth,
The second composition contains 2 to 20 parts by weight of the curing accelerator relative to 100 parts by weight of the acrylic resin,
The dispersant is a polycarboxylic acid ammonium salt or a polycarboxylic acid sodium salt,
The curing accelerator is a two-component acrylic coating composition, characterized in that a cationic polymer, anionic polymer or a mixture of cationic polymer and anionic polymer.
delete delete According to claim 1,
The first composition is a two-component acrylic coating composition characterized in that it further comprises 1 to 10 parts by weight of an amine polymer and 0.5 to 5 parts by weight of a basic compound relative to 100 parts by weight of an acrylic resin.
According to claim 1,
The first composition is a two-component acrylic coating composition characterized in that it further comprises 1 to 10 parts by weight of a copolymer of an acrylate group-containing silane coupling agent and an acrylic acid monomer relative to 100 parts by weight of the acrylic resin.
According to claim 1,
The second composition is a two-component acrylic coating composition characterized in that it further comprises 1 to 10 parts by weight of a copolymer of an acrylate group-containing silane coupling agent and an acrylic acid monomer relative to 100 parts by weight of the acrylic resin.