KR20190119895A - Coating composition - Google Patents

Abstract

The present invention relates to a paint composition which has excellent scratch resistance and comprises: an adamantane group-containing acrylic polyol resin; cyclodextrin; and a hydroxyl group-containing long chain acrylic polyol resin.

Description

Coating composition {COATING COMPOSITION}

The present invention relates to a coating composition excellent in scratch resistance and scratch recovery resistance.

In the automotive coating industry, the top coat may consist of a single layer or a double layer of a base coat and a clear coat. Hue and transparent coating system that applies a clear coat to the base after applying a color coating to the substrate is a finishing process of commonly used automotive coatings, and is capable of withstanding various stringent conditions required for automobiles. Required.

In the case of the conventional one-part coating composition in which a resin containing a hydroxyl group and an amino resin are used as the resin portion, it is widely known that the ether bond formed by the curing mechanism has poor acid resistance while providing excellent coating properties. As one of the methods for solving this problem, coating compositions based on a cured structure having carbamate functional groups have been known in the art. The composition obtained from the coating composition incorporating the carbamate cured structure has high transparency and DOI (phase distinction), and has the effect of improving not only durability, hardness and flexibility but also scratch resistance.

U.S. Pat. The coating composition which is excellent in chemical resistance is disclosed. In addition, US Patent Publication No. 2003-0009052 discloses a coating composition composed of a carbamate-modified acrylic resin, a carbamate-modified polyester, melamine, and a curing agent, in particular, further reacting with carbamate after pre-reacting a lactone with a hydroxyl group. It is disclosed that the carbamate polyester prepared in the form of the present invention can be used as a rheology control agent (RCA) having a property of resisting sagging.

However, when the conventional compositions as described above are applied to a one-part transparent paint using a melamine curing agent, there is still a problem that scratches are easily generated by life contact such as automatic car washing or dust removal, stain removal, and the like. Therefore, even when applied to a one-part coating composition using a melamine curing agent, there is still a need for research to improve scratch resistance.

US 5474511 B US 2003-0009052 A

The present invention is to provide a coating composition excellent in scratch resistance and scratch recovery.

The present invention provides a coating composition comprising an adamantane group-containing acrylic polyol resin, a cyclodextrin, and a hydroxyl group-containing long chain acrylic polyol resin.

The coating composition according to the present invention, despite being a one-part coating composition using a melamine curing agent, not only retains excellent scratch resistance, but also contains cyclodextrin and an adamantane group-containing acrylic polyol resin, thereby providing excellent scratch recovery properties. Indicates.

Hereinafter, the present invention will be described in detail.

The coating composition of this invention contains an adamantane group containing acrylic polyol resin, a cyclodextrin, and a hydroxyl group containing long chain acrylic polyol resin.

The components constituted as described above may be included in an amount of 50 to 80 parts by weight based on 100 parts by weight of the coating composition, and when the content is outside the numerical range, it is difficult to obtain properties such as appearance of the coating and desired mechanical properties.

Hereinafter, the components constituting the coating composition will be described in detail.

Adamantane group-containing acrylic polyol resin (A)

The adamantane group-containing acrylic polyol resin used in the present invention may serve to improve the appearance and mechanical properties of the coating.

The adamantane group-containing acrylic polyol resin is not limited thereto, but may be prepared using, for example, an ethylenically unsaturated monomer, a nonfunctional acrylic monomer, an acrylic monomer containing a hydroxyl group, and an adamantane group-containing acrylic monomer.

The ethylenically unsaturated monomer that may be used to prepare the adamantane group-containing acrylic polyol resin may include, but is not limited to, styrene and its derivatives, butadiene and acrylic or methacrylic esters of C ₁ to C ₁₂ alkyl.

Non-functional acrylic monomers that can be used to prepare the adamantane group-containing acrylic polyol resin include methyl methacrylate, ethyl methacrylate, isobutyl methacrylate, normal butyl methacrylate, tertiary butyl methacrylate, normal hexyl Methacrylate, 2-ethylhexyl methacrylate, isobornyl methacrylate, cyclohexyl methacrylate, methyl acrylate, ethyl acrylate, propyl acrylate, isobutyl acrylate, normal butyl acrylate, tertiary butyl acryl Elate, 2-ethylhexyl acrylate, normaloctyl acrylate, isobornyl acrylate, cyclohexyl acrylate and the like can be used, but is not particularly limited so long as it does not adversely affect the acrylic polyol resin.

The acrylic monomer containing a hydroxyl group that can be used to prepare the adamantane group-containing acrylic polyol resin is 2-hydroxyethyl methacrylate, hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 2-hydroxy Ethyl acrylate, 2-hydroxypropyl acrylate, carduraacrylate, carduramethacrylate, caprolactone acrylate, caprolactone methacrylate, 2,3-dihydroxypropyl acryl, 2,3-dihydroxypropyl Methacrylate, polypropylene modified acrylate, polypropylene modified methacrylate, 4-hydroxymethylcyclohexyl-methylacrylate, 4-hydroxymethylcyclo-methylmethacrylate, 2,2,4-trimethyl -1,3-pentaneol monoacrylate, 2,2,4-trimethyl-1,3-pentaneol monomethacrylate, isobornyl acrylate, isobornyl methacrylate and the like The.

In addition, the adamantane group-containing acrylic monomer that can be used to prepare the adamantane group-containing acrylic polyol resin is 1-adamantyl acrylate, 2-adamantyl acrylate, 1-adamantyl methacrylate, 2- Adamantyl methacrylate, 2-methyl-2-adamantyl acrylate, 2-methyl-2-adamantyl methacrylate, 2-ethyladamantyl methacrylate, hydroxyadamantyl acrylate, Hydroxyadamantyl methacrylate or the like, or 1-adamantanealkyl acrylate, 1-adamantanealkyl methacrylate, wherein the alkyl may be an alkyl group of C ₁ to C ₁₀ .

The adamantane group-containing acrylic polyol resin may be prepared by radical polymerization of the ethylenically unsaturated monomer, the nonfunctional acrylic monomer, the acrylic monomer containing the hydroxyl group, the adamantane group containing acrylic monomer, and the like in an organic solvent.

The organic solvent is not particularly limited as long as it does not adversely affect the polymerization reaction of the adamantane group-containing acrylic polyol resin, for example, aromatic hydrocarbon solvents such as toluene, xylene, cocosol # 100, # 150, methyl ethyl ketone Ketone solvents such as methyl propyl ketone, methyl butyl ketone, ethyl propyl ketone, ester solvents such as methyl acetate, ethyl acetate, n-propyl acetate, n-butyl acetate, ethyl ethoxy propionate, n-butanol, Alcoholic solvents such as propanol and 1-methoxy2-propanol can be used. In the radical polymerization reaction as described above, a molecular weight regulator and a radical polymerization initiator may be used. The molecular weight modifier may be at least one selected from the group consisting of mercaptans such as n-dodecyl mercaptan, n-decyl mercaptan, t-dodecyl mercaptan and alpha methyl styrene dimer. In addition, the radical polymerization initiator is, for example, 2,2'-azobis (2-methylbutylonitrile), 2,2'-azobisisobutylonitrile, dibenzoyl peroxide, or more butyl peroxy benzo Eight, tert-butyl peroxide, tert-butyl peroxy-2-ethylhexanoate, tert-butyl peroxy acetate, tertyl Milperoxy 2-ethylhexanoate, tertyl Milper oxide, cumyl hydroper Oxide, dicumylperoxide and the like.

The adamantane group-containing acrylic polyol resin may have a solid content of 50 to 80 wt% and a hydroxyl value of 30 to 160 mgKOH / g based on the solid weight. In addition, the weight average molecular weight may be 3,000 to 10,000, the glass transition temperature is-30 ℃ to 50 ℃, for example-10 ℃ to 45 ℃. If the weight average molecular weight, glass transition temperature and hydroxyl value in the adamantane group-containing acrylic polyol resin do not satisfy the above range, there is a problem in that the scratch resistance of the finally prepared coating film cannot be obtained. In addition, the adamantane group-containing acrylic polyol resin may have an equivalent weight of adamantane group of 1,000 to 3,000, for example, 1,500 to 2,500 based on the weight of solids. When the equivalent weight of the adamantane group is less than 1,000, there is a problem that the reaction efficiency of the alkyl group-modified cyclodextrin is decreased, so that the expected effect is not increased. Problems that cannot induce an effect may occur.

The adamantane group-containing acrylic polyol resin may be included in an amount of 20 to 60, for example, 30 to 50 parts by weight based on 100 parts by weight of the total coating composition. When the content of the adamantane group-containing acrylic polyol resin is less than 20 parts by weight, problems may occur such that chemical properties such as chemical resistance may be impaired, and when included in more than 60 parts by weight, the coating film becomes excessively hard, such as cold resistance chipping resistance. May occur. In addition, the mechanical properties and workability during manufacturing and painting may be particularly lowered when the numerical range is out of the content.

Cyclodextrin (B)

The cyclodextrin of the present invention may play a role of improving scratch resistance and scratch recovery of the coating film formed by interacting with the adamantane group of the adamantane group-containing acrylic polyol resin.

The cyclodextrin may be α-cyclodextrin comprising 6 glucose, β-cyclodextrin comprising 7 glucose, γ-cyclodextrin comprising 8 glucose, for example β-cyclodextrin. . In the case of using β-cyclodextrin containing 7 glucose, the host-guest reaction with β-cyclodextrin in which the adamantane group of the adamantane group-containing acrylic polyol resin is present in a cyclic form effectively occurs, resulting in an excellent coating film. Scratch recoverability can be exerted.

The hydroxyl group contained in the glucose of the cyclodextrin may be modified with at least one alkyl group in order to increase the solubility in the coating composition of the cyclodextrin. The alkyl group may be methyl group, ethyl group, propyl group, isopropyl group, butyl group, tert-butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, octadecyl group, etc. For example, it may be a profile group.

The cyclodextrin may be included in an amount of 5 to 20, for example, 10 to 15 parts by weight based on 100 parts by weight of the total coating composition. When the content of the hydroxyl-containing long chain acrylic polyol resin is less than 5 parts by weight, it is not possible to exert the effect of improving the elasticity, flexibility and scratch resistance of the coating film, and when included in more than 20 parts by weight, it may be difficult to secure the hardness of the coating film.

The equivalent ratio of the adamantane group to the cyclodextrin of the adamantane group-containing acrylic polyol resin may be 1.5: 1 to 3: 1. When the equivalent ratio is outside the numerical range, a problem may occur in that the scratch restoring effect exerted by the interaction of the cyclodextrin and the adamantane group is lowered.

Hydroxyl-containing long chain acrylic polyol resin (C)

The hydroxyl group-containing long chain acrylic polyol resin may serve to improve gloss and image sharpness of a coating film.

The hydroxyl group-containing long chain acrylic polyol resin may be prepared using an ethylenically unsaturated monomer, a non-functional acrylic monomer, a hydroxyl group-containing long chain polymerizable monomer, and the like. It can be prepared by radical polymerization.

The organic solvent, the radical polymerization initiator, the ethylenically unsaturated monomer, and the non-functional acrylic monomer are the same as those described for the adamantane group-containing acrylic polyol resin, and thus, a detailed description thereof will be omitted.

The hydroxyl group-containing long chain polymerizable monomer for preparing the hydroxyl group-containing long chain acrylic polyol resin may have a chemical structure represented by the following Chemical Formula 1.

[Formula 1]

In Formula 1, R ₁ may be hydrogen, an alkyl group having 1 to 10 carbon atoms, and R ₁ may be any one selected from the group consisting of hydrogen or an alkyl group having 1 to 6 carbon atoms and a cycloalkyl group having 5 to 7 carbon atoms. The R ₁ may be any one selected from the group consisting of hydrogen and an alkyl group having 1 to 4 carbon atoms.

In Formula 1, R ₂ may be any one selected from the group consisting of an alkyl group having 1 to 40 carbon atoms or a cycloalkyl group having 3 to 40 carbon atoms, and R ₂ may be an alkyl group having 2 to 20 carbon atoms and 5 to 30 carbon atoms. It may be any one selected from the group consisting of cycloalkyl groups. The alkyl group may be straight or branched chain, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, sec-butyl, 1-methylbutyl, 1-ethylbutyl, n-pentyl, Isopentyl, neopentyl, tert-pentyl, n-hexyl, 1-methylpentyl, 2-methylpentyl, 4-methyl-2-pentyl, 3,3-dimethylbutyl, 2-ethylbutyl, n-heptyl, 1- Methylhexyl, cyclopentylmethyl, cyclohexylmethyl, n-octyl, tert-octyl, 1-methylheptyl, 2-ethylhexyl, 2-propylpentyl, n-nonyl, 2,2-dimethylheptyl, 1-ethylpropyl, 1,1-dimethylpropyl, isohexyl, 4-methylhexyl, 5-methylhexyl and the like.

In addition, in Formula 1, n may be an integer of 1 to 20, and n may be an integer of 1 to 10, an integer of 1 to 5.

The hydroxyl group-containing long chain polymerizable monomer for preparing the hydroxyl group-containing long chain acrylic polyol resin may be, for example, a polyalkylene glycol mono (meth) acrylate monomer, but is not limited thereto.

The hydroxyl group-containing long chain acrylic polyol resin may have a solid content of 50 to 80 wt%, and a hydroxyl value of 80 to 170 mgKOH / g based on the solid weight. As described above, when the hydroxyl value is less than 80 mgKOH / g and more than 170 mgKOH / g based on the solid content weight, it is impossible to secure the elasticity of the coating film. In addition, the hydroxyl group-containing long chain acrylic polyol resin may have a weight average molecular weight of 10,000 to 30,000, a glass transition temperature of -50 ℃ to 0 ℃. When the numerical range is satisfied, elasticity and scratch resistance of the coating film may be secured.

The hydroxyl group-containing long chain acrylic polyol resin may be included in an amount of 5 to 25, for example, 10 to 20 parts by weight based on 100 parts by weight of the total coating composition. When the content of the hydroxyl group-containing long chain acrylic polyol resin is less than 5 parts by weight, it is not possible to exert an effect of improving the elasticity, flexibility and scratch resistance of the coating film, and when included in more than 25 parts by weight, it may be difficult to secure the hardness of the coating film.

Curing agent (D)

The coating composition may further include a curing agent.

The curing agent may be a melamine compound, for example hexamethylolmelamine, hexamethoxymethylmelamine, hexabutoxymethylmelamine and the like.

The curing agent may be included in an amount of 6 to 25, for example 12 to 18 parts by weight based on 100 parts by weight of the total coating composition. When the content of the curing agent is less than 6 parts by weight, incomplete curing may occur when the curing agent reacts with the components of the coating composition, which may affect hardness and solvent resistance, and when included in excess of 25 parts by weight, due to overcure. In addition to affecting the film properties such as properties and impact resistance, the remaining unreacted melamine compound in the film may adversely affect other properties.

Other Ingredients (E)

The coating composition may further include a curing catalyst, an organic solvent and an additive.

The curing catalyst promotes curing of the resin by a curing agent, and for example, dodecylbenzenesulfonic acid, sulfonic acid, dinonylnaphthalene disulfonic acid, dinonylnaphthalenesulfonic acid, and the like may be used. The organic solvent is not particularly limited, and for example, cocosol # 100, butanol, 1-methoxy-2-propyl acetate, ethyl ethoxy propionate, and mixtures thereof may be used.

As the additive, a surface modifier, a light stabilizer, a weathering additive, an appearance modifier, an antifoaming agent and a leveling agent may be used.

The coating composition of the present invention having the above components has a solid content of 40 to 70% by weight, and the viscosity may be 18 to 50 seconds based on pot cup # 4 at 25 ° C. The viscosity is a viscosity range suitable for painting workability, if it is lower than 18 seconds may cause problems such as flowing down the vertical plane, if exceeding 50 seconds may cause a sprayer failure due to a load on the sprayer, high viscosity Due to this may lead to inhibition in the appearance of the painted object.

The coating composition of the present invention may be provided in a one-part coating. In the case of the one-component paint, problems such as the trouble of mixing two liquid substances generated in the two-component paint and the time required for curing can be solved.

Hereinafter, the present invention will be described in more detail with reference to Examples.

However, these examples are only for the understanding of the present invention, and the scope of the present invention in any sense is not limited to these examples.

Example

Synthesis Example 1: Preparation of adamantane group-containing acrylic polyol resin (A)

30 parts by weight of Cocosol # 100 was inserted into a synthetic four-necked flask equipped with a thermometer, a stirrer, a condenser, and a heating equipment, and the temperature was raised to a reflux temperature of 165 캜. After the reflux was stabilized, 12 parts by weight of 1-adamantane ethyl methacrylate, 33 parts by weight of normal butyl acrylate and 30 parts by weight of 2-hydroxyethyl methacrylate were mixed uniformly, and 5 parts by weight of dibutyl butyl peroxide. , 13 parts by weight of Cocosol # 100 were mixed separately and uniformly and added dropwise to 180 minutes and 195 minutes, respectively, and maintained at reflux for 60 minutes. After the end of the holding, the reaction was cooled to 80 ° C, 15 parts by weight of methyl carbamate and 0.3 part by weight of dibutyl tin oxide were added, and methanol discharged at about 145 ° C was collected separately. After methanol collection was completed, nitrogen was injected to remove residual metal carbamate for 1 hour, and the reaction was terminated by cooling to obtain an adamantane group-containing acrylic polyol resin (A). The adamantane group-containing acrylic polyol resin (A) had a solid content of 65%, a viscosity Z1, and a hydroxyl value of 70 mgKOH / g based on the weight of solids, a weight average molecular weight of 6,000, and a glass transition temperature of 40 ° C. . In addition, the equivalent of the adamantane group of the said resin (A) corresponded to 2,071 based on solid content weight.

Synthesis Example 2 Preparation of Alkyl-Modified β-Cyclodextrin (B)

50 parts by weight of dimethyl sulfoxide was inserted into a synthetic two-necked flask equipped with a thermometer and a stirring device, and the temperature was raised to a reflux temperature of 40 ° C. After the reflux was stabilized, 10 parts by weight of β-cyclodextrin and 24 parts by weight of propyl isocyanate were uniformly mixed and the reflux was maintained for 24 hours. The reaction was then cooled to 25 ° C. Then, to remove the remaining unreacted material, the reactant was put in 200 parts by weight of xylene in the dialysis membrane, and xylene was replaced every 6 hours. Thereafter, the solvent was concentrated using an evaporator to obtain a propyl group-modified β-cyclodextrin resin.

Synthesis Example 3: Preparation of hydroxyl-containing long chain acrylic polyol resin (C)

66 parts by weight of butyl acetate was inserted into a synthetic four-necked flask equipped with a thermometer and a stirring device, and the temperature was raised to a reflux temperature of about 130 ° C. After the reflux was stabilized, 141 parts by weight of Miramer M100 (caprolactone acrylate, unyarn yarn), 39 parts by weight of methyl methacrylate and 2 parts by weight of methacrylic acid were uniformly mixed, and 7 parts by weight of benzoyl peroxide and 7 parts by weight of butyl acetate were uniformly mixed. Thereafter, the mixture was added dropwise and uniformly for 300 minutes, and then maintained at reflux for 60 minutes. Dilution with butyl acetate and cooling the reaction to 60 ℃ solid content 63%, hydroxyl value is 130 mgKOH / g based on solids weight, weight average molecular weight 22,000, glass transition temperature of -30 ℃ hydroxyl-containing long chain acrylic polyol resin ( C) was obtained.

Production Example

Examples 1 and 2, Comparative Examples 1 to 5

Synthesis Examples 1 to 3 were stirred and mixed at 1500 rpm for 20 minutes or more with the composition shown in Table 1 below to prepare a coating composition.

(Unit: weight%) ingredient Example 1 Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 A resin 40 40 65 50 25 59 30 B resin 15 10 - - 25 5 5 C resin 10 15 - 15 15 One 30 Hardener 15 15 15 15 15 15 15 Curing catalyst One One One One One One One Surface conditioner 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Light stabilizer 0.5 0.5 0.5 0.5 0.5 0.5 0.5 UV absorbers 1.1 1.1 1.1 1.1 1.1 1.1 1.1 Cocosol # 100 12.2 12.2 10.7 10.7 10.7 10.7 10.7 Butanol 5 5 6.5 6.5 6.5 6.5 6.5 Sum 100 100 100 100 100 100 100 1) Curing agent: alkylated melamine (Cymel 1161)
2) Curing Catalyst: Dodecylbenzenesulfonic Acid (Nacure XP 221)
3) Surface Modifier: Silicone Surfactant (BYK-331 10% sol'n)
4) Light stabilizer: Hindered amine light stabilizer (Tinuvin 123)
5) UV absorbers: Tinuvin 384

Experimental Example

Paint Coating Condition

In order to measure the coating properties, each of the coating compositions prepared by mixing the composition of Table 1 was coated under the following conditions.

① Handgun spray was used.

② Nozzle diameter: 1.5 mm, air pressure: 4.5 kgf / ㎠ was maintained constant.

③ The distance between the nozzle inlet and the specimen was kept constant in the range of 2 to 30 cm, and was painted while moving at a constant speed at a speed of 40 to 50 cm / sec horizontally.

④ After coating, the part was cured at 130 ° C. for 20 minutes, and then the physical properties (hardness, adhesion, water resistance, acid resistance, scratch resistance, and scratch recovery resistance) of the coating film were measured.

Property measurement method

1. Hardness

Measurement method: It measured by the pencil hardness method. Specifically, the hardness of each of the pencils of 3B, 2B, B, HB, F, H, 2H, and 3H was measured so as not to damage the coating film.

Pencil hardness was marked as 3B, 2B, B, HB, F, H, 2H, 3H in excellent order from thirteen.

2. Adhesion

Measuring method: After the coating specimens finished to the top coat were subjected to a heat treatment cycle and left standing for 24 hours at room temperature, the adhesion was measured by 0.2 mm intervals.

Heat treatment cycle: 150 ° C. 20 minutes, 20 minutes at room temperature The process is repeated three times, and as a result M-1, M-2, M-3, M-4, M-5 Indicated as.

3. Water resistance

Measurement method: The specimen was immersed in a constant temperature water bath at 40 ° C. for 240 hours, and then left at room temperature for 1 hour, followed by peeling test by sticky wood stick evaluation.

Judgment method: After the test, the appearance should not be softened, whitened, poor gloss, peeling, swelling, or discoloration. It evaluated by M-1, M-2, M-3, M-4, M-5 in order of inferiority in water resistance.

4. Acid resistance

Measuring method: After dropwise adding 0.2 mL of 0.1 N sulfuric acid to the test piece, the temperature of the heating oven was set to 35 to 40 ° C and heated for 150 minutes.

Judgment method: The site | part of the test piece which dripped the sulfuric acid solution was visually confirmed whether the etching, a stain, and swelling generate | occur | produced, and the highest temperature which was not damaged was judged as acid resistance temperature.

5. Initial scratch resistance

Measuring method: 10 round trips were performed using Amtec Kistler.

Determination method: The initial 20 degree glossiness of the specimen was measured, and 20 degree gloss was measured after 10 round trips. The gloss retention was calculated by dividing the gloss before measurement by the gloss after measurement.

6. Scratch resiliency

Determination method: After leaving the specimen used in the initial scratch resistance evaluation for 1 hour at 70 ℃, 20 degrees gloss is measured. The gloss retention was computed by dividing the gloss before a measurement implementation by the gloss after a measurement.

Example Comparative example ingredient One 2 One 2 3 4 5 Hardness F HB F HB HB F B Adhesion M-1 M-1 M-1 M-1 M-1 M-1 M-3 Water resistance M-1 M-1 M-1 M-1 M-1 M-1 M-1 Acid resistance 43 ℃ 42 ℃ 43 ℃ 41 ℃ 39 ℃ 43 ℃ 38 ℃ Scratch resistance 73% 74% 54% 57% 61% 59% 64% scratch
Resiliency 82% 83% 55% 58% 63% 60% 65%

As confirmed in Table 2, when only the adamantane group-containing acrylic polyol resin was included in the coating composition (Comparative Example 1), scratch resistance and scratch recovery were only 54% and 55%, respectively.

In the case of Comparative Examples 3 to 5 containing an adamantane group-containing acrylic polyol resin, an alkyl group-modified β-cyclodextrin, and a hydroxyl group-containing long chain acrylic polyol resin as equivalents outside the scope of the present invention, there was little increase in scratch resistance. Scratch recoverability when the equivalent of the adamantane group and the alkyl group-modified β-cyclodextrin contained in the carbon group-containing acrylic polyol resin were included in a ratio of 2: 1 (Example 1) and 3: 1 (Example 2) It was even better at about 80%.

Although the present invention has been described in detail only with respect to the embodiments described, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical spirit of the present invention, and such modifications and modifications belong to the appended claims.

Claims (6)

Coating composition containing an adamantane group containing acrylic polyol resin, a cyclodextrin, and a hydroxyl-containing long chain acrylic polyol resin.
The method according to claim 1,
Based on a total of 100 parts by weight of the coating composition,
The adamantane group-containing acrylic polyol resin is included in an amount of 20 to 60 parts by weight, the cyclodextrin is included in an amount of 5 to 20 parts by weight, and the hydroxyl group-containing long chain acrylic polyol resin is included in an amount of 5 to 25 parts by weight. Paint compositions.
The method according to claim 1,
The cyclodextrin is β-cyclodextrin coating composition.
The method according to claim 1,
The adamantane group-containing acrylic polyol resin has a adamantane group equivalent of 1,000 to 3,000 based on the weight of the solid content.
The method according to claim 1,
The adamantane group-containing acrylic polyol resin has a glass transition temperature of-30 ℃ to 50 ℃ coating composition.
The method according to claim 1,
The coating composition whose equivalence ratio of the adamantane group and the said cyclodextrin of the said adamantane group containing acrylic polyol resin is 1.5: 1-3: 1.