KR101137247B1 - Eco-friendly two pack waterborne fluoride paint composition and manufacturing method, coating constructionmethod using the same - Google Patents

Abstract

PURPOSE: A two-component type water-soluble fluorine-containing paint composition is provided to improve staining resistance and weatherability, and to use water as a diluent to avoid regulation. CONSTITUTION: A two-component type water-soluble fluorine-containing paint composition comprises: a base material comprising acryl-modified fluorinated emulsion resin, water-soluble urethane emulsion resin with hydroxy group, pigment, water soluble solvent, and solvent; and a hardener containing blocked isocyanate and water. The pigment comprises at least one kind selected from titanium dioxide, calcium carbonate, magnesium silicate, aluminum silicate, cobalt aluminate and cobalt chromite. The blocked isocyanate resin is blocked of hexamethylene diisocyanate and isophorone diisocyanate.

Description

Eco-friendly two pack waterborne fluoride paint composition and manufacturing method, coating construction method using the same}

The present invention relates to a two-component water-soluble fluorine coating composition, a manufacturing method thereof, and a construction method using the same.

The fluorine paint according to the present invention is to improve the additives so as to satisfy various environmental regulations while mixing the additives to be utilized as a paint for medium corrosion protection.

The heavy-duty paint is a paint and a coating method for long-term protection of a large steel structure in a corrosive environment, such as bridges, offshore structures, nuclear power plants, various plants, containers, ships, and the like, such as acrylic paint, Alkyd paint, acrylic urethane paint, fluorine paint, and the like.

However, since the coating film is formed on the part exposed to the outside, which is the characteristic of heavy-duty paints, pollution resistance and discoloration resistance are important properties, among which fluorine paint and acrylic urethane paints are more resistant to external pollutants than other heavy-duty paints. Due to denaturation and the resulting peeling rate is slow.

The fluorine paint has a strong bond of 105.4 Kcal / mol of carbon atoms and fluorine atoms, thus forming a strong coating film, which is excellent in UV, moisture, acid, alkali and air pollutants, and has high water repellency. As a result, the deterioration of the coating film is small, and long-term storage is possible. Most of these fluorine paints are two-component oil paints requiring an isocyanate curing agent.

For this reason, researches on fluorine paints that can be applied in various fields have been conducted to supplement or replace existing paints. Among them, Korean Patent No. 10-0710507 proposes a one-component fluorine paint in which a polyvinylidene fluoride (PVdF) resin, a thermoplastic acrylic resin, and a thermosetting acrylic resin are mixed. It did not overcome the disadvantage of requiring a bake condition.

In addition, International Patent Publication No. 2008-047761 discloses a fluorine coating composition containing a main component comprising a fluorine-containing copolymer having a hydroxyl group and a curing agent comprising a polyisocyanate compound, but having disadvantages in terms of physical properties. There is this.

In addition, the paint is mainly an oil-based paint, there is a restriction on the use as the volatile organic compound (VOC) regulation is strengthened, and the physical properties are deteriorated when using the forced emulsification method using a conventional emulsifier.

Republic of Korea Patent Publication 10-0710507 (Application Date: 2007.01.02) International Publication 2008-0047761 (filed date: October 15, 2007) Republic of Korea Patent Publication 10-0608334 (Application Date 2003.12.29 p.2 ~ 3)

Accordingly, the present invention is to solve the problems described above, and is not restricted by the volatile organic compound (VOC) regulation, which is a disadvantage of oil paint, and utilizes the advantages of each paint such as weather resistance of fluorine paint and gloss of urethane paint. The present invention relates to a two-component water-soluble fluorine coating composition, a method for preparing the same, and a construction method using the same, to compensate for the disadvantages of other paints and to improve stain resistance and weather resistance.

In order to achieve the above object, the present invention comprises an acrylic modified fluorine emulsion resin and a water-soluble urethane emulsion resin having a hydroxy group, a pigment, a water-soluble solvent, and a curable agent comprising a blocked isocyanate resin and water and a main composition. It is done.

The acrylic modified fluorine emulsion resin is at least one selected from vinylidene fluoride, vinyl fluoride, trifluoroethylene, cyclotrifluoroethylene (CTFE), tetrafluoroethylene (TFE) and hexafluoropropylene (HFP). Characterized by polymerizing and dispersing methyl methacrylate and ethyl acrylate in the terminal of the homopolymer or copolymer composed of a monomer comprising a.

The water-soluble urethane emulsion resin having a hydroxy group polymerizes at least two acrylic monomers selected from 2-hydroxy ethyl methacrylate, methyl methacrylate, ethyl acrylate, and n-butyl acrylate monomer, triethylamine or ammonia It is neutralized with at least 1 sort (s) selected from, and solid content is 30-50%. It is characterized in that the number average molecular weight is prepared so that 10,000 to 30,000.

The pigment is characterized in that it comprises at least one selected from titanium dioxide, calcium carbonate, magnesium silicate, aluminum silicate, cobalt aluminate and cobalt chromite.

The water-soluble solvent is characterized in that it comprises at least one selected from ethyl cellulose solution, butyl cellulose solution, methyl carbitol, ethyl carbitol, butyl carbitol, ethyl alcohol, methyl alcohol, butyl alcohol and isobutyl alcohol.

The blocked isocyanate resin is characterized by blocking aliphatic hexamethylene diisocyanate and isophorone diisocyanate.

And the manufacturing method of the two-component water-soluble fluorine paint is 10 to 50 parts by weight of acrylic modified fluorine emulsion resin and 10 to 30 parts by weight of water-soluble urethane emulsion resin having a hydroxyl group, 10 to 25 parts by weight of pigment, 1 to 10 parts by weight of water-soluble solvent, water The main body which mixed 5-15 weight part, and the hardening | curing agent containing 30-60 weight part of blocked isocyanate resin, and 40-70 weight part of water are characterized by mixing.

The subject matter and the curing agent are characterized in that the mixing at a weight ratio of 5 to 10: 1.

It is characterized in that it also includes a method of construction by a coating method using a paint containing a two-component water-soluble fluorine coating composition according to the above production method.

As described above, the two-component water-soluble fluorine coating composition according to the present invention, a manufacturing method thereof, and a construction method using the same have an effect of improving pollution resistance and weather resistance and avoiding the regulation of volatile organic compounds by using water as a diluent. .

The present invention provides a two-component water-soluble fluorine coating composition comprising an acrylic-modified fluorine emulsion resin and a water-soluble urethane emulsion resin having a hydroxyl group, a pigment, a water-soluble solvent, a main agent containing water, and a curing agent containing a blocked isocyanate resin and water, and a preparation thereof. It is about how to.

The acrylic modified fluorine emulsion resin is at least one selected from vinylidene fluoride, vinyl fluoride, trifluoroethylene, cyclotrifluoroethylene (CTFE), tetrafluoroethylene (TFE) and hexafluoropropylene (HFP). An acrylic monomer such as methyl methacrylate and ethyl acrylate is polymerized and dispersed at the end of the homopolymer or copolymer composed of a monomer including a monomer.

More preferably, the copolymer is made of 80 to 90 parts by weight of vinylidene fluoride and 10 to 20 parts by weight of hexafluoropropylene, and then 50 to 70 parts by weight of at least one selected from the acrylic monomers is 30 It is an acrylic modified fluorine emulsion resin superposed | polymerized at the weight of 50-50 weight part.

The acrylic modified fluorine emulsion resin not only improves the characteristic of forming a coating film by melting at a high temperature of the fluorine-based resin to dry at room temperature, but also to maintain a stable emulsion state in an aqueous solution. The acrylic modified fluorine emulsion resin is prepared to polymerize 50 to 70% by weight of fluorinated resin, 30 to 50% by weight of the terminal acrylic monomer, and to have a high number average molecular weight of 100,000 or more.

The water-soluble urethane emulsion resin having a hydroxy group polymerizes at least two acrylic monomers selected from 2-hydroxy ethyl methacrylate, methyl methacrylate, ethyl acrylate, and n-butyl acrylate monomer, triethylamine or ammonia It is prepared by neutralizing with at least one selected from.

More specifically, when polymerizing at least two acrylic monomers selected from 2-hydroxy ethyl methacrylate, methyl methacrylate, ethyl acrylate and n-butyl acrylate monomers, sodium persulfate is mixed with an initiator and When the polymerization is completed, it is stabilized by neutralization with at least one selected from triethylamine or ammonia, and then dissolved by adding an initiator sodium persulfate, 2-hydroxy ethyl methacrylate, methyl methacrylate, ethyl acrylate and The at least two acrylic monomers selected from the n-butyl acrylate monomers have a solid content of 30 to 50%, a pH of 7 to 9, a number average molecular weight of 10,000 to 30,000, and a hydroxy group of 40 to 80 based on solids. To prepare a water-soluble urethane emulsion resin having.
Water-soluble urethane emulsion resin having a hydroxyl group prepared as described above may be possible to form a coating film at a temperature of -5 to 40 ℃.
More preferably, the water-soluble urethane emulsion resin having a hydroxy group is 30 to 50 parts by weight of at least two acrylic monomers selected from 2-hydroxy ethyl methacrylate, methyl methacrylate, ethyl acrylate and n-butyl acrylate monomers. 1 to 10 parts by weight of initiator sodium persulfate was mixed to polymerize, and when the polymerization was completed, at least one selected from triethylamine or ammonia was stabilized by neutralizing 20 to 40 parts by weight, and then the amount of the initiator sodium persulfate (a) was added. At least two acrylic monomers selected from 2-hydroxy ethyl methacrylate, methyl methacrylate, ethyl acrylate, and n-butyl acrylate monomers were added to the solid content, acidity, number average molecular weight, and the like. Including the step of adding, stirring to prepare It is prepared.

The pigment includes at least one selected from titanium dioxide, calcium carbonate, magnesium silicate, aluminum silicate, cobalt aluminate and cobalt chromite.

The water-soluble solvent includes at least one selected from ethyl cellulsolve, butyl cellulsolve, methyl carbitol, ethyl carbitol, butyl carbitol, ethyl alcohol, methyl alcohol, butyl alcohol and isobutyl alcohol.

The blocked isocyanate resin of the curing agent blocks aliphatic hexamethylene diisocyanate and isophorone diisocyanate, has a solid content of 90 to 100% and an NCO content of 15 to 20%.

The method for producing the two-component water-soluble fluorine paint is 10 to 50 parts by weight of an acrylic modified fluorine emulsion resin and 10 to 30 parts by weight of a water-soluble urethane emulsion resin having a hydroxyl group, 10 to 25 parts by weight of a pigment, 1 to 10 parts by weight of a water-soluble solvent, and water. The main body which mixed 5-15 weight part and the hardening | curing agent containing 30-60 weight part of blocked isocyanate resins and 40-70 weight part of water are mixed, and the mixing ratio of a main body and a hardening | curing agent is mixed by the weight ratio of 5-10: 1.

When the acrylic modified fluorine emulsion resin is contained in less than 10 parts by weight, the weather resistance of the coating film is inferior, and when it exceeds 50 parts by weight, there is a problem that the coating film adhesion.

When water-soluble urethane emulsion resin which has the said hydroxyl group contains less than 10 weight part, coating-film adhesion falls, and when it exceeds 30 weight part, weather resistance and chemical resistance fall.

When the pigment is contained in less than 10 parts by weight, the hiding power due to color and coating film is insufficient, the chemical resistance and weather resistance is lowered, if it exceeds 25 parts by weight, economic efficiency is lowered, impact resistance and adhesion may be reduced.

When the water-soluble solvent is contained in less than 1 part by weight, drying may be slow, coating film formation may be difficult, and when the water-soluble solvent exceeds 10 parts by weight, the content of volatile organic compounds in the composition may increase, which may be difficult to commercialize. .

If the content of the water is less than 5 parts by weight, the storage stability is lowered, and if it exceeds 15 parts by weight, the viscosity of the paint is low, there is a problem that the coating workability is lowered.

The curing agent contains 30 to 60 parts by weight of blocked isocyanate resin and 40 to 70 parts by weight of water.

When the isocyanate blocked in the curing agent is less than 30 parts by weight and the water exceeds 70 parts by weight, the storage stability is lowered, when the blocked isocyanate is greater than 60 parts by weight and the water is less than 40 parts by weight, the coating film adhesion is lowered. there is a problem.

In addition to the above essential components, the two-component water-soluble fluorine coating composition of the present invention further contains conventional additives usable for coating such as antifoaming agents, surfactants, wetting agents, wetting dispersants, plasticizers, preservatives, pH adjusting agents, thickeners and the like as necessary. can do.

And it also includes the method of construction by the coating method using the coating material containing the 2-component water-soluble fluorine coating composition which concerns on the said manufacturing method. In addition, the two-component water-soluble fluorine coating composition prepared by the above production method may be used as a primer and a main agent in a known coating method. These basic painting methods include brush painting, spatula coating, roller painting, air spray, airless spray, hot spray, electrostatic coating, electrodeposition coating and powder coating. , Flow coating, and TFS (Trichlene Finishing System) coating.

In addition, the two-component water-soluble fluorine coating composition prepared by the manufacturing method according to the present invention is applicable as a primer and a main body regardless of the position or order among the top, middle, bottom and surface treatments classified according to the coating position or order, It can be applied as a primer and host material for heavy corrosion protection and concrete.

More preferably, the coating film is coated with a two-component water-soluble fluorine coating composition prepared by the manufacturing method according to the present invention so that the thickness of the dry coating film is 20 to 100 μm, and the thickness of the dry coating film is 30-150 micrometers and coats so that the thickness of a dry coat film may be 25-100 micrometers at the time of undercoat. In order to remove more than 95% of the contaminants that are placed in the corrosive environment such as high humidity and chemical environment, the surface treatment is sprayed with a nozzle or washed close to a white blast using a winssim wheel and then coated. desirable.

The coating of the upper, middle, lower and surface treatments should be completely dried by air drying for 1 hour to 7 days or completely removed from foreign substances and painted on top. And the drying conditions should be different depending on the temperature, humidity, season, during the winter season it is more preferable to coat after 4 to 5 days after the coating to require a longer drying time than other seasons.

When the thickness of the dry coat is less than 20 μm, less than 30 μm in the middle coat, and less than 25 μm in the middle coat, the chemical resistance and weather resistance are deteriorated, and the thickness of the dry coat in the top coat is over 100 μm. In the case of over 150 μm in the case of coating, and over 100 μm in the undercoat, the drying time is long and the economical efficiency is lowered. In addition, if the drying time is less than 1 hour, the drying may not be sufficient and the surface may be uneven or deformed, and if it exceeds 7 days, the economical efficiency is lowered.

In the above-described two-component water-soluble fluorine coating composition according to the present invention, it will be described in more detail through examples. The following examples are presented to illustrate and explain the present invention and should not be construed as limiting the present invention to these examples.

Example 1

To prepare the main body, 7 g of water, 1 g of a surfactant (Triton cf-10, DOW), and 1 g of a wet dispersion agent (BYK 180, BYK) of an emulsion paint were added to the flask, followed by stirring at 1500 rpm using a stirrer. In order to remove bubbles generated on the surface under stirring, 0.2 g of antifoaming agent (BYK011, BYK) was added thereto and stirred for 5 minutes, 20 g of titanium dioxad (R960, DUPON) was added thereto, and 10 minutes at 1500 rpm. Stir.

0.5 g of propylene glycol as a subsidiary liquid and 0.5 g of polyether modified siloxane (BYK349, BYK) as a wetting agent were added to the stirring solution, and stirred at 3000 rpm to obtain a particle size of 5 or less, and a urethane thickener (HIRESOL 200, Hankuk Latices) Add 3 g and stir again at 3000 rpm for 10 minutes. Then, 50 g of an acrylic modified fluorine emulsion resin (RC-10206, Alchema, 48 wt% solids) and 10 g of a water-soluble urethane emulsion resin (W3-7301, 42 wt% solids) having a hydroxyl group were added thereto, and the mixture was stirred at 1000 rpm for 30 minutes. After adding 1 g of a plasticizer ester alcohol (texanol, ESTMAN company), 0.2 g of a waterproofing agent (BETACIDE LX, Osan Chemical Co., Ltd.), and 0.1 g of 25% ammonia water, a pH adjusting agent, the mixture was stirred at 1000 rpm and maintained for 10 minutes. In order to remove the generated bubbles, 0.5 g of an antifoaming agent (BYK011, BYK) was added and stirred at 1000 rpm for 15 minutes.

0.1 g of polyether-modified dimethylpolysiloxane (BYK333, BYK), an ionic surfactant, was added thereto, 0.5 g of ethylcellulose solution and 1.5 g of water were added thereto, and the mixture was stirred at 1000 rpm for 15 minutes.

Thereafter, 3 g of butyl celusolve, a water-soluble solvent, 0.5 g of an acrylic thickener (HISOL D206, HANKUCK LATICES) and 1.3 g of water were added thereto, and the mixture was stirred at 1000 rpm for 20 minutes.

The method of preparing the curing agent is prepared by adding 50 g of blocked isocyanate resin (RHODOCOAT WT2102, Rhodia Co., Ltd.) to the flask, stirring at 1000 rpm for 20 minutes, and slowly adding 50 g of water for 30 minutes.

The main body and the hardener prepared in the same manner as described above are prepared by mixing at a weight ratio of 8: 1.

Example 2

To prepare the main body, 8 g of water, 1 g of a surfactant (Triton cf-10, DOW) and 1 g of a wet dispersant (BYK 180, BYK) of an emulsion paint were added to the flask, followed by stirring at 1500 rpm using a stirrer. In order to remove bubbles generated on the surface under stirring, 0.2 g of antifoaming agent (BYK011, BYK) was added thereto and stirred for 5 minutes, 20 g of titanium dioxad (R960, DUPON) was added thereto, and 10 minutes at 1500 rpm. Stir.

0.5 g of propylene glycol as a subsidiary liquid and 0.5 g of polyether modified siloxane (BYK349, BYK) as a wetting agent were added to the stirring solution, and stirred at 3000 rpm to obtain a particle size of 5 or less, and a urethane thickener (HIRESOL 200, Hankuk Latices) Add 3 g and stir again at 3000 rpm for 10 minutes. 40 g of an acrylic modified fluorine emulsion resin (RC-10206, Alchema, 48 wt% solids) and 20 g of a water-soluble urethane emulsion resin (W3-7301, 42 wt% solids) having a hydroxyl group were added thereto and stirred at 1000 rpm for 30 minutes. After adding 3 g of a plasticizer ester alcohol (texanol, ESTMAN company), 0.2 g of a waterproofing agent (BETACIDE LX, Osan Chemical Co., Ltd.), and 0.1 g of 25% ammonia water, a pH adjusting agent, the mixture was stirred at 1000 rpm and maintained for 10 minutes. In order to remove the generated bubbles, 0.5 g of an antifoaming agent (BYK011, BYK) was added and stirred at 1000 rpm for 15 minutes.

0.1 g of polyether-modified dimethylpolysiloxane (BYK333, BYK), an ionic surfactant, was added thereto, 0.5 g of ethyl cellulose solution and 2.5 g of water were added thereto, and the mixture was stirred at 1000 rpm for 15 minutes.

Then, 2 g of butyl cellulsolve, a water-soluble solvent, 0.5 g of an acrylic thickener (HISOL D206, HANKUCK LATICES) and 2.3 g of water were added thereto, and the mixture was stirred at 1000 rpm for 20 minutes.

The method of preparing the curing agent is prepared by adding 50 g of blocked isocyanate resin (RHODOCOAT WT2102, Rhodia Co., Ltd.) to the flask, stirring at 1000 rpm for 20 minutes, and slowly adding 50 g of water for 30 minutes.

The main body and the hardener prepared in the same manner as above are prepared by mixing at a weight ratio of 7: 1.

Example 3

To prepare the main body, 8 g of water, 1 g of a surfactant (Triton cf-10, DOW) and 1 g of a wet dispersant (BYK 180, BYK) of an emulsion paint were added to the flask, followed by stirring at 1500 rpm using a stirrer. In order to remove bubbles generated on the surface under stirring, 0.2 g of antifoaming agent (BYK011, BYK) was added thereto and stirred for 5 minutes, 20 g of titanium dioxad (R960, DUPON) was added thereto, and 10 minutes at 1500 rpm. Stir.

0.5 g of propylene glycol as a subsidiary liquid and 0.5 g of polyether modified siloxane (BYK349, BYK) as a wetting agent were added to the stirring solution, and stirred at 3000 rpm to obtain a particle size of 5 or less, and a urethane thickener (HIRESOL 200, Hankuk Latices) Add 3 g and stir again at 3000 rpm for 10 minutes. Then, 30 g of an acrylic modified fluorine emulsion resin (RC-10206, Alchema, solid content 48% by weight) and 30 g of a water-soluble urethane emulsion resin (W3-7301, solid content 42% by weight) having a hydroxyl group were stirred at 1000 rpm for 30 minutes. 2 g of a plasticizer ester alcohol (texanol, ESTMAN), 0.2 g of a waterproofing agent (BETACIDE LX, Osan Chemical Co., Ltd.) and 25% of ammonia water, a pH adjuster, were added at 0.1 g, stirred at 1000 rpm, and maintained for 10 minutes. In order to remove the generated bubbles, 0.5 g of an antifoaming agent (BYK011, BYK) was added and stirred at 1000 rpm for 15 minutes.

0.1 g of polyether-modified dimethylpolysiloxane (BYK333, BYK), an ionic surfactant, was added thereto, 0.5 g of ethylcellulose solution and 3 g of water were added thereto, and the mixture was stirred at 1000 rpm for 15 minutes.

Then, 2 g of butyl cellulsolve, a water-soluble solvent, 0.5 g of an acrylic thickener (HISOL D206, HANKUCK LATICES) and 2.8 g of water were added thereto, and the mixture was stirred at 1000 rpm for 20 minutes.

The method of preparing the curing agent is prepared by adding 50 g of blocked isocyanate resin (RHODOCOAT WT2102, Rhodia Co., Ltd.) to the flask, stirring at 1000 rpm for 20 minutes, and slowly adding 50 g of water for 30 minutes.

It is prepared by mixing the main body and the hardener prepared in the above manner in a weight ratio of 6: 1.

Comparative Example 1

An oil-free yellowing type acrylic urethane paint (AU6203B, AK ChemTech Co., Ltd.) was purchased and used as a control, acrylic polyol was used as an isocyanate curing agent, and the main body and the curing agent were prepared by mixing at a weight ratio of 6: 1.

Comparative Example 2

Oil-based natural dry fluorine paint (AK FRON, AK ChemTech Co., Ltd.) was purchased and used as a control, copolymer of acrylic monomer and isocyanate curing agent, and the main body and curing agent were prepared by mixing at a weight ratio of 6: 1.

It is the table | surface put together about said Examples 1-3 and Comparative Examples 1-2.

division  (Unit: weight%) Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2






week



My
Acrylic Modified Fluorine Emulsion Resin 50 40 30 Water-soluble urethane emulsion resin having a hydroxyl group 10 20 30 Pigment 20 20 20 Water soluble solvent 3.5 2.5 2.5 water 7.8 10.8 11.8 Wet Dispersant One One One Antifoam 0.8 0.8 0.8 antifreeze 0.5 0.5 0.5 Wetting agent 0.5 0.5 0.5 Thickener 3.5 2.5 2.5 Plasticizer One 3 2 antiseptic 0.2 0.2 0.2 pH regulator 0.1 0.1 0.1 Surfactants 1.1 1.1 1.1 Yellowless acrylic urethane paint 100 Fluorine paint 100

circa

anger

My
Blocked isocyanates 50 50 50 water 50 50 50 Isocyanate 50 50 Polyol 50 Copolymer of polyfluoro and acrylic monomer 50 Subject: Hardener Mixing Ratio
(Weight) 8: 1 7: 1 6: 1 6: 1 6: 1

Specimen Manufacturing Method

As a method of manufacturing a specimen to be used in the following experimental example, rust-treated epoxy epoxy zinc paint (AK zinc EZP-10W, AK ChemTech) on a blasted hot rolled steel sheet most similar to the steel surface used in the steel painting site After coating only the drying degree to a thickness of 75㎛ and dried for one day, the water-soluble epoxy intermediate paint (AKUAPOXY (S) # 200, Ak ChemTech) is coated with a dry coating thickness of 100㎛ and dried for one day. Thereafter, the coating compositions prepared in Examples 1 to 3 and Comparative Examples 1 to 2 were coated with a dry coating thickness of 40 μm and the physical properties of the coating films were tested.

Experimental Example 1

In the drying test, the glass plate was coated with a wet coating film thickness of 5 Mil to evaluate dryness.

Experimental Example 2

The coating film of the specimen was drawn at a 2 mm interval to cross the test specimen surface using a razor to make 100 scales, and when the scotch tape of the KS S1528 standard was sufficiently pressed and pulled in the 90 degree direction, the peeling state of the coating film Observe.

Experimental Example 3

As an experiment on the salt spray resistance, the coating film of the specimen was dried for 7 days after the top coat, and subjected to 240 hours according to the experimental method of ASTM D2247, ASTM D714, and the measurement was made within 10 seconds after removing the specimen from low temperature. .

Experimental Example 4

According to the test method of ASTM D1308, the specimens were completely dried using water, water resistance was Xylene, alkali resistance was saturated calcium hydroxide solution, and acid resistance was 5% sulfuric acid solution for 240 hours. Observe the appearance and color change of the coating film.

Experimental Example 5

The specimens were maintained for 1000 hours in a QUV tester (type B), which is an accelerated weathering tester, and the gloss retention rate and color change were observed.

(◎ -excellent, ○ -good, △ -deficient, X-defective) division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Experimental Example 1 ○ ○ ○ ○ ○ Experimental Example 2 ◎ ◎ ◎ ◎ ◎ Experimental Example 3 ◎ ◎ ◎ ◎ ◎ Experimental Example 4 Water resistance ◎ ◎ ◎ ◎ ◎ Solvent resistance ◎ ◎ ◎ ◎ ◎ Alkali resistance ◎ ◎ ◎ ○ ◎ Acid resistance ◎ ◎ ◎ ◎ ◎ Experimental Example 5 0.8 1.9 1.0 1.7 1.0

As can be seen in Table 2, the coating film formed of the coating composition of the present invention was found to be similar to or more than the results of weather resistance, stain resistance, etc. for Comparative Examples 1 and 2, which are difficult to cope with the regulation of volatile organic compounds. Thus, it can be confirmed that the two-component water-soluble fluorine coating composition of the present invention is applicable to replace the existing paint.

Claims (10)

The subject containing an acrylic modified fluorine emulsion resin and a water-soluble urethane emulsion resin having a hydroxyl group, a pigment, a water-soluble solvent, and water; And,
A two-component water-soluble fluorine coating composition comprising a cured agent containing a blocked isocyanate resin and water. The method of claim 1,
The acrylic modified fluorine emulsion resin is at least one selected from vinylidene fluoride, vinyl fluoride, trifluoroethylene, cyclotrifluoroethylene (CTFE), tetrafluoroethylene (TFE) and hexafluoropropylene (HFP). A two-component water-soluble fluorine coating composition characterized by polymerizing and dispersing methyl methacrylate and ethyl acrylate at the terminal of a homopolymer or copolymer composed of a monomer comprising a monomer. The method of claim 1,
The water-soluble urethane emulsion resin having a hydroxy group polymerizes at least two acrylic monomers selected from 2-hydroxy ethyl methacrylate, methyl methacrylate, ethyl acrylate, and n-butyl acrylate monomer, triethylamine or ammonia It is neutralized with at least 1 sort (s) selected from, and solid content is 30-50%. A two-component water-soluble fluorine coating composition, which is prepared so as to have a number average molecular weight of 10,000 to 30,000. The method of claim 1,
The pigment is a two-component water-soluble fluorine coating composition comprising at least one selected from titanium dioxide, calcium carbonate, magnesium silicate, aluminum silicate, cobalt aluminate and cobalt chromite. The method of claim 1,
The water-soluble solvent is a two-component type, characterized in that it comprises at least one selected from ethyl cell solution, butyl cell solution, methyl carbitol, ethyl carbitol, butyl carbitol, ethyl alcohol, methyl alcohol, butyl alcohol and isobutyl alcohol Water-soluble fluorine coating composition. The method of claim 1,
The blocked isocyanate resin is a two-component water-soluble fluorine coating composition characterized in that an aliphatic hexamethylene diisocyanate and isophorone diisocyanate are blocked. 10 to 50 parts by weight of acrylic modified fluorine emulsion resin and 10 to 30 parts by weight of a water-soluble urethane emulsion resin having a hydroxy group, 10 to 25 parts by weight of a pigment, 1 to 10 parts by weight of a water-soluble solvent, and 5 to 15 parts by weight of water; And
30-60 parts by weight of blocked isocyanate resin and a curing agent containing 40 to 70 parts by weight of water; a two-component water-soluble fluorine coating composition production method. The method of claim 7, wherein
Method for producing a two-component water-soluble fluorine coating composition, characterized in that the main agent and the curing agent are mixed in a weight ratio of 5 to 10: 1. The method of claim 7, wherein
The water-soluble urethane emulsion resin having a hydroxy group is polymerized by polymerizing at least two acrylic monomers selected from 2-hydroxy ethyl methacrylate, methyl methacrylate, ethyl acrylate and n-butyl acrylate monomers. A method for producing a two-component water-soluble fluorine coating composition, characterized in that it is neutralized with. A coating method using a coating material comprising a two-component water-soluble fluorine coating composition prepared by the manufacturing method according to any one of claims 7 to 9.