KR20180035397A - Urethane Paint Composition - Google Patents

Abstract

The present invention provides a urethane paint composition including: a first acrylic resin formed from a first polymerizable composition including 30 to 50% by weight of an alkyl monomer containing C_1-C_12 alkyl groups, 5 to 15% by weight of an acrylic monomer containing a hydroxyl group, 40 to 60% by weight of a solvent and 0.1 to 3% by weight of a polymerization initiator; a second acrylic resin formed from a second polymerizable composition including 30 to 50% by weight of an alkyl monomer containing C_1-C_12 alkyl groups, 5 to 15% by weight of an acrylic monomer containing a hydroxyl group, 5 to 15% by weight of a styrene monomer, 0.1 to 3% by weight of an acrylic monomer containing a carboxylic acid group, 30 to 50% by weight of a solvent, and 0.1 to 3% by weight of a polymerization initiator; and a urethane curing agent. Accordingly, the present invention can form a coating film with excellent gloss characteristics and weather resistance at the same time.

Description

[0001] Urethane Paint Composition [0002]

The present invention relates to a urethane coating composition.

The coating material for construction equipments such as excavator exhibits anticorrosion performance at the lower and upper and lower sides, and appearance and weathering performance at the upper surface [refer to Korean Patent No. 10-0579081]. At this time, a urethane paint composition is mainly used as a top coat. The weatherability specifications of the top coat required by construction equipment companies are different, and in recent years, such weatherability standards have become more stringent.

As the binder resin of the urethane paint composition, an acrylic polyol resin is used. Such an acryl polyol resin contains a styrene monomer (SM) as a monomer in an amount greater than or equal to a certain amount for excellent gloss characteristics. However, since the styrene monomer contains a benzene ring, the double bond may be broken by ultraviolet rays to cause discoloration or loss of gloss of the coating film, which may lower the weatherability of the coating film.

Therefore, development of a urethane paint composition capable of securing excellent gloss characteristics and weather resistance is required.

Korean Patent No. 10-0579081

The present invention provides a urethane coating composition capable of forming a coating film having excellent gloss characteristics and weather resistance at the same time.

On the other hand, the present invention relates to a process for producing an acrylic polymer composition comprising 30 to 50% by weight of an acrylic monomer containing a C ₁ -C ₁₂ alkyl group, 5 to 15% by weight of a hydroxyl group-containing acrylic monomer, 40 to 60% by weight of a solvent and 0.1 to 3% A first acrylic resin formed from a polymerizable composition; 30 to 50 wt% of an acrylic monomer containing a C ₁ -C ₁₂ alkyl group, 5 to 15 wt% of a hydroxyl group-containing acrylic monomer, 5 to 15 wt% of a styrene monomer, 0.1 to 3 wt% of a carboxylic acid group- % Of a polymerization initiator and 0.1 to 3 wt% of a polymerization initiator; And a urethane curing agent.

In one embodiment of the present invention, the first polymerizable composition does not contain a styrene monomer.

In one embodiment of the present invention, the urethane curing agent may be a polyisocyanate.

On the other hand, the present invention relates to a coating film formed using the urethane coating composition.

The urethane coating composition according to the present invention can form a coating film which secures excellent gloss characteristics and weather resistance at the same time. Accordingly, the urethane coating composition according to the present invention can be used as an image for the construction equipment such as an excavator.

Hereinafter, the present invention will be described in more detail.

An embodiment of the present invention is a composition comprising 30 to 50% by weight of an acrylic monomer containing a C ₁ -C ₁₂ alkyl group, 5 to 15% by weight of a hydroxyl group-containing acrylic monomer, 40 to 60% by weight of a solvent and 0.1 to 3% A first acrylic resin formed from a first polymerizable composition; 30 to 50 wt% of an acrylic monomer containing a C ₁ -C ₁₂ alkyl group, 5 to 15 wt% of a hydroxyl group-containing acrylic monomer, 5 to 15 wt% of a styrene monomer, 0.1 to 3 wt% of a carboxylic acid group- % Of a polymerization initiator and 0.1 to 3 wt% of a polymerization initiator; And a urethane curing agent.

The urethane coating composition may be a two-pack type heat drying type and may be applied to a top coat.

In one embodiment of the present invention, the first acrylic resin and the second acrylic resin serve as a binder in the urethane coating composition according to the present invention.

Wherein the first acrylic resin comprises 30 to 50% by weight of an acrylic monomer containing a C ₁ -C ₁₂ alkyl group, 5 to 15% by weight of a hydroxyl group-containing acrylic monomer, 40 to 60% by weight of a solvent and 0.1 to 3% 1 < / RTI > polymerizable composition.

The first polymerizable composition does not contain a styrene monomer, so that the first acrylic resin does not have a styrene monomer derived unit.

The first acrylic resin may have a weight average molecular weight of 20,000 to 40,000 and a hydroxyl value of 70 to 100.

Wherein the second acrylic resin comprises 30 to 50% by weight of an acrylic monomer containing a C ₁ -C ₁₂ alkyl group, 5 to 15% by weight of a hydroxyl group-containing acrylic monomer, 5 to 15% by weight of a styrene monomer, 0.1 to 3% From 30 to 50% by weight of a solvent, and from 0.1 to 3% by weight of a polymerization initiator.

The second acrylic resin may have a weight average molecular weight of 10,000 to 20,000 and a hydroxyl value of 50 to 80. [

Examples of the C ₁ -C ₁₂ alkyl group-containing acrylic monomer include methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, isobutyl acrylate, tertiary butyl acrylate, n-hexyl acrylate, Acrylate, n-octyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, tertiary butyl methacrylate, n-hexyl methacrylate, 2- Ethylhexyl methacrylate, etc. These may be used alone or in combination of two or more.

Examples of the hydroxyl group-containing acrylic monomer include 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, caprolactone acrylate, Dihydroxypropyl methacrylate, 4-hydroxymethylcyclohexylmethyl acrylate, 4-hydroxymethylcyclohexylmethyl methacrylate, 2, 3-dihydroxypropyl methacrylate, 2,4-trimethyl-1,3-pentanediol monoacrylate, 2,2,4-trimethyl-1,3-pentanediol monomethacrylate, etc. These may be used alone or in combination of two or more .

Examples of the monomer having a carboxylic acid group include monovalent acids such as (meth) acrylic acid and crotonic acid; Dicarboxylic acids such as maleic acid, itaconic acid, and fumaric acid, and monoalkyl esters thereof; 3- (meth) acryloylpropionic acid; A succinic anhydride ring-opening addition adduct of 2-hydroxyalkyl (meth) acrylate in which the alkyl group has 2 to 4 carbon atoms, anhydrous succinic ring opening adduct of a hydroxyalkylene glycol (meth) acrylate having 2 to 4 carbon atoms in the alkylene group , And compounds obtained by ring-opening addition of succinic anhydride to a caprolactone adduct of 2-hydroxyalkyl (meth) acrylate having 2 to 3 carbon atoms in the alkyl group. These may be used alone or in combination of two or more kinds thereof have.

Examples of the solvent include aromatic hydrocarbons such as toluene and xylene; Ketones such as methyl ethyl ketone, methyl propyl ketone, methyl butyl ketone, ethyl propyl ketone and methyl isobutyl ketone; Ester solvents such as methyl acetate, ethyl acetate, n-propyl acetate, isopropyl acetate, butyl acetate, propyleneglycol monomethyl ether acetate, methyl cellosolve acetate, cellosolve acetate, butyl cellosolve acetate and carbitol acetate; Alcohol solvents such as normal propanol, isopropanol, normal butanol, isobutanol, tertiary butanol, etc. may be used. These solvents may be used alone or in combination of two or more.

Examples of the polymerization initiator include tertiary butyl peroxybenzoate, 2,2-azobis (2-methylbutylonitrile), 2,2-azobisisobutylonitrile, dibenzoyl peroxide, ditertiary butyl peroxide, Ethylhexanoate, tertiary butyl peroxyacetate, cumyl hydroperoxide, dicumyl peroxide, tertiary butyl hydroperoxide, and the like, which may be used alone or in combination of two or more kinds Can be used.

The first acrylic resin and the second acrylic resin may be prepared from the first polymerizable composition and the second polymerizable composition by a solution polymerization method by a free radical mechanism, and the polymerization temperature is, for example, 80 to 200 DEG C .

In one embodiment of the present invention, the first acrylic resin may be used in an amount of 10 to 20% by weight based on 100% by weight of the entire urethane coating composition. If the content of the first acrylic resin is less than 10% by weight, the weather resistance may be deteriorated. If the content is more than 20% by weight, gloss may be deteriorated.

In one embodiment of the present invention, the second acrylic resin may be used in a range of 20 to 30% by weight based on 100% by weight of the entire urethane coating composition. If the content of the second acrylic resin is less than 20% by weight, the gloss may be deteriorated. If the content is more than 30% by weight, the weather resistance may be deteriorated.

The urethane coating composition according to the present invention can simultaneously ensure the weatherability and gloss characteristics of the coating film by using the first acrylic resin and the second acrylic resin together as a binder.

In one embodiment of the present invention, the urethane curing agent may comprise a polyisocyanate. In the present invention, the polyisocyanate means a compound having two or more isocyanate groups.

The polyisocyanate may be an aliphatic or aromatic polyisocyanate including an alicyclic group. Typical examples thereof include tetramethylene diisocyanate, hexamethylene diisocyanate, dicyclohexylmethane-4,4'-diisocyanate, and isophorone diisocyanate an aliphatic polyisocyanate selected from the group consisting of diisocyanates; Toluene diisocyanate, p-phenylene diisocyanate, diphenylmethane-4,4'-diisocyanate, and triphenylmethane-4,4'-diisocyanate. , 4 " -triisocyanate, and the like.

In one embodiment of the present invention, the urethane curing agent may be used in an amount of 3 to 10% by weight based on the total 100% by weight of the urethane coating composition. If the content of the urethane curing agent is less than 3% by weight, the gloss and adhesion may be deteriorated. If the content of the urethane curing agent is more than 10% by weight, adhesion and drying property may be deteriorated.

The urethane coating composition according to one embodiment of the present invention may further comprise a pigment and a solvent.

The urethane coating composition according to one embodiment of the present invention comprises 10 to 20% by weight of the first acrylic resin, 20 to 30% by weight of the second acrylic resin, 3 to 10% by weight of a urethane curing agent, 1 to 20% 30 to 50% by weight.

In one embodiment of the present invention, the pigment imparts hiding power and / or coloring power to the coating film as a coloring agent for inorganic or organic compounds on a colorant of a colorless pigment which is not soluble in water or a solvent.

As the pigment, those generally used in urethane coating compositions can be used without limitation. Specifically, CI Pigment Orange 73, CI Pigment Yellow 154, TiO ₂ , Fe ₂ O ₃ and the like can be used as the pigment. The pigments may be used alone or in combination for color control of the coating film.

The pigment may be used in an amount of 1 to 20% by weight based on 100% by weight of the total amount of the urethane coating composition. If the content of the pigment is less than 1% by weight, there may be a problem of concealing defects. If the content is more than 20% by weight, the flowability may be deteriorated and the physical properties of the coating film may deteriorate and the cost may increase.

In one embodiment of the present invention, the solvent may be various organic solvents capable of dissolving and / or dispersing the first acrylic resin and the second acrylic resin which are binder resins. For example, the first polymerizable The composition and / or the solvent used in the second polymerizable composition may be used.

The solvent may be used in an amount of 30 to 50% by weight based on 100% by weight of the entire urethane coating composition. If the content of the solvent is less than 30% by weight, the workability may be poor. If the content is more than 50% by weight, the coloring ability may be deteriorated.

The urethane coating composition according to one embodiment of the present invention may further contain various additives such as a light stabilizer, a dispersing agent, a curing catalyst, a leveling agent and the like as necessary.

As the light stabilizer, a conventional light stabilizer can be used. For example, a hydroxyphenyltriazine light stabilizer, a sterically hindered amine light stabilizer and the like can be used. The light stabilizer may be used in an amount ranging from 0.5 to 3% by weight based on 100% by weight of the entire urethane coating composition. If the content of the light stabilizer is less than 0.5% by weight, the weather resistance may be deteriorated. If the content is more than 3% by weight, physical properties such as pencil hardness and impact resistance may be deteriorated.

As the dispersing agent, an ordinary dispersing agent can be used, and for example, EFKA PX 4310 (BASF) can be used. As the curing catalyst, a conventional curing catalyst can be used. For example, dibutyltin dilaurate, dibutyltin oxide, or the like can be used. As the leveling agent, a conventional leveling agent may be used. For example, TEGO GLIDE B 1484 (manufactured by EVONIK) may be used.

The additive (s) may be used in an amount ranging from 0.5 to 10% by weight based on the total 100% by weight of the urethane coating composition.

The urethane coating composition according to the present invention can be applied to a construction equipment such as an excavator by a method such as brushing, spraying, roller, etc., followed by heating and drying to form a coating film. The heating and drying can be carried out at a temperature of 60 to 80 ° C for 30 to 60 minutes.

Accordingly, one embodiment of the present invention relates to a coating film formed using the urethane coating composition.

Further, one embodiment of the present invention relates to a construction equipment coated with a coating film formed using the urethane coating composition.

Hereinafter, the present invention will be described more specifically with reference to Examples, Comparative Examples and Experimental Examples. It should be apparent to those skilled in the art that these examples, comparative examples and experimental examples are only for illustrating the present invention, and the scope of the present invention is not limited thereto.

Manufacturing example  1: Acrylic Polyol  Preparation of Resin 1

25 g of butyl acetate and 25 g of toluene were added to a four-necked flask equipped with a thermometer, a condenser, a dropping funnel and a stirrer, and the mixture was heated to 130 ° C with stirring. Then, 23 g of methyl methacrylate, 17 g of n- 9 g of ethyl acrylate and 1 g of TBPB (tert-butyl peroxybenzoate, Sigma Aldrich) were added dropwise at a uniform rate over 3 hours and reacted for 1 hour to prepare an acrylic polyol resin. The acrylic polyol resin had a weight average molecular weight of 29,500, a glass transition temperature (Tg) of 21.7 DEG C, a hydroxyl value of 80.3, and a specific gravity of 0.99.

Manufacturing example  2: Acrylic Polyol  Preparation of Resin 2

39 g of xylene was added to a four-necked flask equipped with a thermometer, a condenser, a dropping funnel and a stirrer, and the mixture was heated to 130 ° C while stirring. 12 g of styrene, 15 g of methyl methacrylate, 22 g of n-butyl acrylate, 10 g of 2-hydroxyethyl methacrylate, 1 g of methacrylic acid and 1 g of TBPB (Sigma Aldrich) were added dropwise at a uniform rate over 3 hours, To prepare an acrylic polyol resin. The acrylic polyol resin had a weight average molecular weight of 16,800, a glass transition temperature (Tg) of 20 占 폚, a hydroxyl value of 69, and a specific gravity of 0.99.

Manufacturing example  3: Acrylic Polyol  Preparation of Resin 3

40 g of xylene was put into a four-necked flask equipped with a thermometer, a condenser, a dropping funnel and a stirrer, and the mixture was heated to 130 DEG C with stirring. Then, 21 g of styrene, 2 g of methyl methacrylate, 20 g of 2- ethylhexyl acrylate, 16 g of hydroxyethyl methacrylate and 1 g of TBPB (Sigma Aldrich) were added dropwise at a uniform rate over 3 hours and reacted for 1 hour to prepare an acrylic polyol resin. The acrylic polyol resin had a weight average molecular weight of 17,000, a glass transition temperature (Tg) of 20 DEG C, a hydroxyl value of 117, and a specific gravity of 0.99.

Manufacturing example  4: Acrylic Polyol  Preparation of Resin 4

34 g of toluene and 14 g of butyl acetate were added to a four-necked flask equipped with a thermometer, a condenser, a dropping funnel and a stirrer, and the mixture was heated to 130 ° C. with stirring. Then, 18.5 g of styrene, 18.5 g of methyl methacrylate, , 10 g of 2-hydroxyethyl acrylate and 1.5 g of TBPB (Sigma Aldrich) were added dropwise at a uniform rate over 3 hours and reacted for 1 hour to prepare an acrylic polyol resin. The acrylic polyol resin had a weight average molecular weight of 24,000, a glass transition temperature (Tg) of 70 DEG C, a hydroxyl value of 82.5, and a specific gravity of 0.99.

Example  And Comparative Example : Preparation of Urethane Coating Composition

The urethane coating compositions were prepared in the compositions shown in Table 1 below (unit: wt%).

ingredient Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Acrylic polyol resin 1 13.6 13.6 13.6 17 11.3 37.5 Acrylic polyol resin 2 23.9 23.9 23.9 25.4 22.9 37.5 Acrylic polyol resin 3 13.6 Acrylic polyol resin 4 23.9 Pigment 1 3 2.4 3 3 3 3 3 3 Pigment 2 2.4 5 2.4 2.4 2.4 2.4 2.4 2.4 Pigment 3 5.1 5.1 5.1 5.1 5.1 5.1 5.1 5.1 Light stabilizer One One 1.5 One One One One One solvent 36.9 34.9 36.4 31.6 40.4 36.9 36.9 36.9 Dispersant 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 Curing catalyst 3 3 3 3 3 3 3 3 Leveling agent 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 Urethane hardener 6.4 6.4 6.4 6.8 6.2 6.4 6.4 6.4 Sum 100 100 100 100 100 100 100 100

- Pigment 1: C.I. Pigment Orange 73

- Pigment 2: C.I. Pigment Yellow 154

- Pigment 3: Pigment White 6 (TiO ₂ )

- Light stabilizer: TINUVIN 400 (BASF)

- Solvent: butyl acetate

- Dispersant: EFKA PX 4310 (BASF)

- Curing catalyst: DBTDL (Wuchang Unemployment)

- Leveling agent: TEGO GLIDE B 1484 (EVONIK)

- Urethane hardener: DURANATE TPA-90SB (ASAHI KASEI)

Experimental Example : Evaluation of Physical Properties of Coating Film

After the physical roughness was formed on the 0.7T CR plate with Sand Paper # 220, the contaminants were completely removed by using the solvent. (UP195PTA, KCC) was applied with air spray at a dry film thickness of 35 ± 5 microns and the substrate was heated and cooled at 80 ° C for 30 minutes. When the undercoating was completed, the top coat was applied by air spray at a dry film thickness of 40 ± 5 microns using the coating composition prepared in the above Examples and Comparative Examples, and the substrate was dried by heating at 80 ° C. for 30 minutes and then left at room temperature for 7 days Fully cured.

The physical properties of the coating film were evaluated by the following evaluation methods, and the results are shown in Table 2 below.

(One) Flowability

ASTM D4400-89a according to the following evaluation criteria. Specifically, the base and the curing agent were mixed well to the ratio, and the graduation was confirmed by applying to the glass plate using a SAG METER.

<Evaluation Criteria>

◎: 2.5 mil or more

○: Less than 2.5 mil or less than 2 mils

?: Less than 1.5 mil and less than 2 mil

X: less than 1 mil and less than 1.5 mil

(2) Drying

ASTM D1640-03 according to the following evaluation criteria. Specifically, the subject and hardener were mixed well in proportion, and the tack-free drying time was measured after application to a glass plate using a 150 micron applicator.

<Evaluation Criteria>

◎: Less than 40 minutes

○: 40 minutes or more and less than 50 minutes

△: 50 minutes or more and less than 60 minutes

X: 60 minutes or more

(3) Attachment

And evaluated according to ASTM D3359-08. Specifically, a cross cut was made on the coated specimen with a size of 2 mm × 2 mm, and then the number of peeled portions was observed after the tape adhesion test among 100 scales.

<Evaluation Criteria>

◎: Number of peelings less than 1

○: Number of peelings 1 or more and less than 5

△: Number of peelings 5 or more and less than 15

X: Number of peelings 15 or more

(4) Pencil Hardness

And evaluated according to ASTM D3363-05. Specifically, five lines were drawn for each step on a specimen painted with a Mitsubishi Unit pencil, and the results were evaluated as NG when the number of marks was 3 or more. When the number was less than 3, the pencil hardness was measured, Described in accordance with the following evaluation criteria.

<Evaluation Criteria>

◎: H or more

○: Less than H or less than F

?: Less than F, HB or more

X: B or less

(5) Impact resistance

The DuPont impact tester was used to evaluate the following evaluation criteria. Specifically, we used a weight having a PLUNGE SIZE of 1/2 inch and a weight of 500 g, and measured the crack-free height of the coating upon free fall.

 <Evaluation Criteria>

◎: more than 30cm

○: 25cm or more and less than 30cm

B: 20 cm or more and less than 25 cm

X: less than 20 cm

(6) Water resistance

ASTM D714-02e1 according to the following evaluation method. Specifically, the coating film was dipped for 240 hours, naturally dried at room temperature for 1 hour, and evaluated for appearance. The outer appearance of the coating film was evaluated in terms of blistering / adhesion and adhesion (Cross Cut 2 mm) and described in accordance with the following evaluation criteria.

<Evaluation Criteria>

◎: Blister, 5B (percentage of removed area / 0% free)

○: Blister, 4B (percentage of removed area / less than 5%)

?: Blister, 3B (percentage of removed area / 5-15%)

X: blister oil, 0B (percentage of removed area / over 65%)

(7) Gloss retention

The gloss retention ratio was measured and evaluated in accordance with ASTM D2565-99. Specifically, the initial gloss value of the weather-resistant applied electrodeposition coating film was measured, and the gloss value decreased after the test was finished to convert the gloss value retained into percent (%).

<Evaluation Criteria>

◎: 90% or more

○: 85% or more and less than 90%

?: 80% or more and less than 85%

X: less than 80%

(8) Color difference

The color difference was measured and evaluated according to ASTM D2565-99. Specifically, the color absolute values (L, a, b) of the specimens before and after the weathering test were measured, and the color values changed after the test were measured using X-RITE.

<Evaluation Criteria>

⊚: DE <3.5

?: 3.5? DE <4.0

Δ: 4.0 ≦ DE <4.5

X: DE ≥ 4.5

(9) Accelerated weathering resistance

The color difference and gloss retention were evaluated according to ASTM D2565 after 3000 hours of evaluation. Specifically, evaluation was made using the gloss retention ratio and the color difference value before and after the injection.

<Evaluation Criteria>

⊚: DE <3.5, gloss retention rate 90% or more

○: 3.5 ≦ DE <4.0, gloss retention ratio of 90% or more

?: 4.0? DE <4.5, gloss retention rate 80% or more and less than 90%

X: DE ≥ 4.5, gloss retention less than 80%

(10) glossy

The gloss of the painted specimen was measured with a BYK polisher and evaluated according to the following evaluation criteria. Specifically, gloss values of fully cured specimens were evaluated.

<Evaluation Criteria>

◎: 85% or more

○: 80% or more and less than 85%

?: 75% or more and less than 80%

X: Less than 75%

Properties Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example 1 Comparative Example 2 Comparative Example 3 Flowability ◎ ○ ◎ ○ ◎ ◎ ○ ○ Drying ◎ ◎ ◎ ◎ ○ ◎ ○ ○ Attachment ◎ ◎ ◎ ◎ ◎ ◎ ○ ○ Pencil hardness ◎ ◎ ○ ○ ◎ X △ X Impact resistance ◎ ◎ ○ ○ ◎ △ △ △ Water resistance ◎ ◎ ◎ ◎ ○ ◎ ◎ ◎ Gloss retention ◎ ◎ ◎ ◎ ◎ X △ X Color difference ◎ ◎ ◎ ○ ◎ X △ X Accelerated weathering ◎ ◎ ◎ ○ ◎ X △ X Polish ◎ ◎ ◎ ◎ ◎ ○ ○ ○

As can be seen from the results of Table 2, the coating films formed from the urethane coating compositions of Examples 1 to 5 have excellent weatherability and excellent gloss, so that the coating film can be maintained for a long time Able to know. On the contrary, the coating films formed from the urethane coating compositions of Comparative Examples 1 to 3 were found to be unable to secure weatherability and gloss characteristics at the same time. In addition, the coating films formed from the urethane coating compositions of Examples 1 to 5 were superior in pencil hardness and impact resistance to the coating films formed from the urethane coating compositions of Comparative Examples 1 to 3.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Do. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Accordingly, the actual scope of the invention is defined by the appended claims and their equivalents.

Claims (9)

From a _first polymerizable composition comprising 30 to 50 wt% of a C ₁ -C ₁₂ alkyl group-containing acrylic monomer, 5 to 15 wt% of a hydroxyl group-containing acrylic monomer, 40 to 60 wt% of a solvent, and 0.1 to 3 wt% A first acrylic resin;
30 to 50 wt% of an acrylic monomer containing a C ₁ -C ₁₂ alkyl group, 5 to 15 wt% of a hydroxyl group-containing acrylic monomer, 5 to 15 wt% of a styrene monomer, 0.1 to 3 wt% of a carboxylic acid group- % Of a polymerization initiator and 0.1 to 3 wt% of a polymerization initiator; And
A urethane coating composition comprising a urethane curing agent. The urethane paint composition according to claim 1, wherein the first polymerizable composition does not contain a styrene monomer. The urethane coating composition according to claim 1, wherein the first acrylic resin has a weight average molecular weight of 20,000 to 40,000 and a hydroxyl value of 70 to 100. 2. The urethane coating composition according to claim 1, wherein the second acrylic resin has a weight average molecular weight of 10,000 to 20,000 and a hydroxyl value of 50 to 80. 2. The urethane coating composition according to claim 1, The urethane coating composition according to claim 1, wherein the urethane curing agent is polyisocyanate. The urethane paint composition according to claim 1, further comprising a pigment and a solvent. The urethane paint composition according to claim 6, wherein the urethane coating composition comprises 10 to 20 wt% of the first acrylic resin, 20 to 30 wt% of the second acrylic resin, 3 to 10 wt% of a urethane curing agent, 1 to 20 wt% To 50% by weight of the urethane coating composition. The urethane coating composition of claim 1, further comprising at least one additive selected from the group consisting of light stabilizers, dispersants, curing catalysts, and leveling agents. A coating film formed using the urethane coating composition according to any one of claims 1 to 8.