KR101419054B1 - Antifouling coating composition for headlamp lens - Google Patents

Abstract

(Meth) acrylate, a carboxyl group-containing monomer, N-methylol acrylamide, N-dimethylacrylamide, N, N-dimethylacrylamide, A thermosetting acrylic copolymer produced by polymerizing at least two hydrophilic monomers selected from the group consisting of (meth) acrylic acid monomers, (meth) acrylamides, and dimethylaminopropyl methacrylamides, hydroxyl group-containing (meth) acrylate monomers and hydrophobic (meth) acrylate monomers; Diluting solvents; And an antifogging coating composition for a headlamp lens comprising at least one crosslinking agent selected from an isocyanate compound, a urea compound and a melamine compound.

Antifouling, paints, automobile, head lamp, acrylic copolymer

Description

[0001] The present invention relates to an antifog coating composition for a headlamp lens,

The present invention relates to an antifogging coating composition for a headlamp lens.

In order to prevent moisture or condensation inside the automobile lamp, a method of coating antifogging paint on the inside is used. Such an antifogging coating composition is usually composed of at least one of a block copolymer and a graft copolymer and a surfactant. However, since the production process of the copolymer is complicated, the production cost is high and the use of the glass surfactant causes the environment There is a disadvantage that harmful substances are generated.

The present invention has been made to solve the problems of the prior art as described above, and it is an object of the present invention to provide an antifogging coating composition which is simple in manufacturing process of resin and has low manufacturing cost and does not cause generation of environmentally harmful substances, and has excellent durability such as water resistance, And an antifogging coating composition for a headlamp lens.

(Meth) acrylate, a carboxyl group-containing monomer, N-methylol acrylamide, N-dimethylacrylamide, N, N-dimethylacrylamide, At least two hydrophilic monomers selected from dimethylaminopropyl methacrylamide; A hydroxyl group-containing (meth) acrylate monomer; And a thermosetting acrylic copolymer prepared by polymerizing a hydrophobic (meth) acrylate monomer; Diluting solvents; And an antifogging coating composition for a headlamp lens comprising at least one crosslinking agent selected from an isocyanate compound, a urea compound and a melamine compound.

The composition comprises 5 to 50% by weight (based on solid content) of the thermosetting acrylic copolymer and 40 to 80% by weight of the diluting solvent, based on the total weight of the total coating composition; It is preferable that the cross-linking agent is contained in an amount of 0.1 to 30 parts by weight based on 100 parts by weight of the solid content of the thermosetting acrylic polymer.

In the above composition, the thermosetting acrylic copolymer may comprise 20 to 80 parts by weight of the hydrophilic monomer based on 100 parts by weight of the solid content of the thermosetting acrylic copolymer; 2 to 40 parts by weight of the hydroxyl group-containing (meth) acrylate monomer; And 20 to 60 parts by weight of the hydrophobic (meth) acrylate monomer.

The anti-fogging coating composition for a headlamp lens of the present invention has a low manufacturing cost due to a simple resin manufacturing process and does not use a glass surfactant. Therefore, there is no concern about the generation of environmentally harmful substances and durability such as water resistance and moisture resistance great.

The hydrophilic monomer contained in the thermosetting acrylic copolymer used in the coating composition of the present invention is divided into a nonionic system and an ionic monomer, and the ionic monomer can be further divided into a cationic system and an anionic system, It is preferable that the cationic monomer and the anionic monomer are appropriately mixed and used in the monomer and the ionic monomer. Accordingly, polyoxyethylene (meth) acrylate is used as the nonionic monomer, and as the cationic monomer, dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, N-methyl Acrylamide, N-dimethylacrylamide, N-dimethylaminopropylmethacrylamide and an anionic monomer, a carboxyl group-containing monomer is used.

Examples of the carboxyl group-containing monomer which is an anionic monomer include (meth) acrylic acid, maleic acid, fumaric acid, itaconic acid, maleic acid monomethyl, monobutyl maleate, monoethyl maleate, Butyl, and modified acids including unsaturated groups.

Use of such a hydrophilic monomer brings about the effect of producing a polymer having sufficient antifogging properties, and it is preferable to select at least two kinds of hydrophilic monomers. In particular, it is preferable to use at least two kinds of monomers selected from a nonionic monomer, a cationic monomer and an anionic monomer.

The hydrophilic monomer is contained in the coating composition in an amount of 20 to 80 parts by weight based on 100 parts by weight of the solid content of the thermosetting acrylic polymer. When the amount is less than 20 parts by weight, the antifogging property is deteriorated. When the amount is more than 80 parts by weight The anti-fogging function can be enhanced by increasing the hydrophilicity, but the water resistance is lowered. Therefore, it is used within the above-mentioned range (preferably 20 to 70 parts by weight).

On the other hand, the carboxyl group-containing monomer which is an anionic monomer in the hydrophilic monomer is preferably used in an amount of 40 parts by weight or less based on 100 parts by weight of the solid content of the thermosetting acrylic polymer. When the carboxyl group-containing monomer is used in an amount of more than 40 parts by weight, the reactivity with the crosslinking agent can be increased, but the amount of the other hydrophilic monomer and the hydrophobic (meth) acrylate monomer is relatively reduced, and the anti-fogging property and water resistance are lowered.

Examples of the hydrophobic (meth) acrylate monomer contained in the coating composition of the present invention include aromatic (meth) acrylate monomers such as styrene and vinyl toluene and monomers such as methyl (meth) acrylate, ethyl (meth) acrylate, (Meth) acrylate such as isobutyl (meth) acrylate, tert-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, cyclohexyl (meth) acrylate, And at least one selected from the group consisting of esters can be used.

The hydrophobic (meth) acrylate monomer is contained in the coating composition in an amount of 20 to 60 parts by weight based on 100 parts by weight of the solid content of the thermosetting acrylic polymer. When the amount is less than 20 parts by weight, If it is used in excess of 60 parts by weight, the anti-fogging effect is disadvantageously deteriorated.

Examples of the hydroxyl group-containing (meth) acrylate monomer contained in the coating composition of the present invention include hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate and hydroxybutyl May be used.

The hydroxyl group-containing (meth) acrylate monomer is used in the coating composition in an amount of 2 to 40 parts by weight based on 100 parts by weight of the solid content of the thermosetting acrylic polymer. When the amount is less than 2 parts by weight, If the amount is more than 40 parts by weight, the amount of the hydrophilic monomer and the hydrophobic (meth) acrylate monomer to be used becomes relatively insufficient, so that the desired antifogging property and water resistance can not be obtained. Therefore, it is used within the above-mentioned range (preferably 5 to 30 parts by weight).

The thermosetting acrylic copolymer used in the coating composition of the present invention is a thermosetting acrylic copolymer which is obtained by reacting 2,2-azobisisobutyronitrile, 2,2-azobisisobutyronitrile with a hydrophilic monomer and a hydrophobic (meth) acrylate monomer, Azo compounds such as bis- (2-methylbutyronitrile) and 2,2-azobis- (2,4-dimethylvaleronitrile); An initiator such as benzoyl peroxide, lauroyl peroxide, cumene hydroperoxide, t-butyl peroxy-2-ethylhexanoate and t-amyl peroxy-2-ethylhexanoate is added, Butanol, normal butanol, diacetone alcohol and methanol, ketone solvents such as methyl ethyl ketone and methyl isobutyl ketone, and cellosolve solvents such as methyl cellosolve and ethyl cellosolve, Followed by radical polymerization.

The thermosetting acrylic copolymer in the coating composition of the present invention is preferably contained in an amount of 5 to 50% by weight (based on the solid content) based on the total weight of the coating composition, and when the content is less than 5% by weight, , And if it is contained in an amount exceeding 50% by weight, the hydrophilicity may be increased and the anti-fogging function may be enhanced, but the water resistance may be lowered.

The crosslinking agent used in the coating composition of the present invention is one or more selected from an isocyanate compound, a urea compound and a melamine compound. Since the isocyanate compound has good reactivity with the thermosetting acrylic polymer at room temperature, It is preferable to use a blocked isocyanate compound so that the reaction stability of the coating composition can be improved and the pot life of the coating composition can be controlled.

When the crosslinking agent is used in an amount of less than 0.1 part by weight, the crosslinking agent may be deteriorated and the water resistance, heat resistance and light resistance may be insufficient. When the crosslinking agent is used in an amount of less than 30 parts by weight The cross-linking density is increased and the antifogging property of the coating film is rapidly lowered and the transparency is also lowered. Therefore, it is used within the above-mentioned range (preferably 0.1 to 20 parts by weight).

On the other hand, an accelerator may be used to control the curing reaction. When an isocyanate compound is used as a crosslinking agent, the carboxyl group-containing monomer serves as a catalyst, and no accelerator may be used. When a urea compound or a melamine compound is used, It is preferably used for reacting with the thermosetting acrylic polymer to cure. Examples of the accelerator to be used herein include sulfonic acids such as para-toluenesulfonic acid, dodecylbenzenesulfonic acid, dinonylnaphthalenesulfonic acid and dinonylnaphthalenedisulfonic acid, and alkylphosphates such as alkylphosphoric acid and phenylphosphoric acid. It is preferable to use a curing type acrylic polymer and a block type of accelerator so as to increase the reaction stability at room temperature and adjust the pot life of the paint. The accelerator is used in the coating composition in an amount of 10 parts by weight or less based on 100 parts by weight of the solid content of the thermosetting acrylic polymer. When the isocyanate compound is not used as a crosslinking agent, And when it is used in an amount exceeding 10 parts by weight, water resistance is deteriorated due to excessive acidity and the transparency of the coating film is also lowered. Therefore, it is used within the above-mentioned range (preferably 5 parts by weight or less).

Examples of the diluent for use in the composition of the present invention include alcohol solvents such as isopropyl alcohol, isobutanol, n-butanol, diacetone alcohol and methanol, ketone solvents such as methyl ethyl ketone and methyl isobutyl ketone, At least one selected from the group consisting of sorbose, ethyl cellosolve and the like can be used.

In the present invention, the diluting solvent is preferably contained in an amount of 40 to 80% by weight based on the total weight of the coating composition. When the diluting solvent is contained in an amount of less than 40% by weight, the viscosity of the coating is high, If it is contained in an amount exceeding 80% by weight, the solids content is low and a sufficient coating film can not be raised.

Conventional additives known in the art may be included in the composition of the present invention as needed. Additives include light stabilizers, thickeners, antioxidants, dispersants, neutralizing agents, and the like.

Hereinafter, the present invention will be described in more detail with reference to Preparation Examples and Examples. However, the scope of the present invention is not limited by the following examples.

Manufacturing example  One: Thermosetting type  Preparation of acrylic polymer A

100 parts by weight of butyl cellosolve was placed in a reaction vessel, and then the inside of the vessel was replaced with nitrogen gas. To the reaction vessel were added 35 parts by weight of methyl (meth) acrylate, dimethylaminoethyl (meth) 5 parts by weight of 2-hydroxyethyl (meth) acrylate, 20 parts by weight of polyoxyethylene (meth) acrylate (nonion), 10 parts by weight of a carboxyl group-containing monomer (anion), 30 parts by weight of azobisisobutyronitrile 2 parts by weight based on the total weight of butyronitrile was added dropwise for 3 hours and reacted for 1 hour. Then, 0.5 part by weight of azobisisobutyronitrile was further added, and the mixture was continuously reacted for 3 hours to obtain a polymer having a concentration of 40 % ≪ / RTI >

Manufacturing example  2: Thermosetting type  Preparation of acrylic polymer B

100 parts by weight of butyl cellosolve was placed in the reaction container, and the inside of the container was replaced with nitrogen gas. To the mixture, 35 parts by weight of methyl (meth) acrylate and 30 parts by weight of diethylaminoethyl (meth) acrylate , 5 parts by weight of 2-hydroxyethyl (meth) acrylate, 20 parts by weight of polyoxyethylene (meth) acrylate, 10 parts by weight of a carboxyl group-containing monomer, 2 parts by weight of azobisisobutyronitrile as a reaction initiator 0.5 part by weight of azobisisobutyronitrile was further added thereto, and the mixture was continuously reacted for 3 hours. After completion of the reaction, the mixture was diluted with butyl cellosolve so that the concentration of the obtained polymer became 40% Respectively.

Manufacturing example  3: Thermosetting type  Preparation of acrylic polymer C

100 parts by weight of butyl cellosolve was placed in a reaction vessel, and then the inside of the vessel was replaced with nitrogen gas. To the vessel was maintained at a temperature of 80 占 폚. 35 parts by weight of methyl (meth) acrylate, 30 parts by weight of N-dimethylacrylamide, 5 parts by weight of hydroxyethyl (meth) acrylate, 20 parts by weight of polyoxyethylene (meth) acrylate, 10 parts by weight of a carboxyl group-containing monomer, and 2 parts by weight of azobisisobutyronitrile as a reaction initiator The mixture was added dropwise for 3 hours and reacted for 1 hour. Then, 0.5 part by weight of azobisisobutyronitrile was further added, and the mixture was continuously reacted for 3 hours. After completion of the reaction, the mixture was diluted with butyl cellosolve to a concentration of 40%.

Manufacturing example  4: Thermosetting type  Preparation of acrylic polymer D

100 parts by weight of butyl cellosolve was placed in a reaction vessel, and then the inside of the vessel was replaced with nitrogen gas, and 25 parts by weight of methyl (meth) acrylate and 40 parts by weight of diethylaminoethyl (meth) , 5 parts by weight of 2-hydroxyethyl (meth) acrylate, 20 parts by weight of polyoxyethylene (meth) acrylate, 10 parts by weight of a carboxyl group-containing monomer, 2 parts by weight of azobisisobutyronitrile as a reaction initiator 0.5 part by weight of azobisisobutyronitrile was further added thereto, and the mixture was continuously reacted for 3 hours. After completion of the reaction, the mixture was diluted with butyl cellosolve so that the concentration of the obtained polymer became 40% Respectively.

Manufacturing example  5: Thermosetting type  Preparation of acrylic polymer E

100 parts by weight of butyl cellosolve was placed in a reaction vessel, and then the interior of the vessel was replaced with nitrogen gas, and 55 parts by weight of methyl (meth) acrylate, 2 parts by weight of 2-hydroxyethyl , 30 parts by weight of dimethylaminoethyl (meth) acrylate, 10 parts by weight of a carboxyl group-containing monomer, and 2 parts by weight of azobisisobutyronitrile as a reaction initiator were added dropwise over 3 hours, And then 0.5 part by weight of azobisisobutyronitrile was further added thereto. The mixture was continuously reacted for 3 hours, and diluted with butyl cellosolve so that the concentration of the obtained polymer was 40% after completion of the reaction.

Manufacturing example  6: Thermosetting type  Preparation of acrylic polymer F

100 parts by weight of butyl cellosolve was placed in a reaction vessel, and then the interior of the vessel was replaced with nitrogen gas, and 55 parts by weight of methyl (meth) acrylate, 2 parts by weight of 2-hydroxyethyl , 30 parts by weight of polyoxyethylene (meth) acrylate, 10 parts by weight of a carboxyl group-containing monomer, and 2 parts by weight of azobisisobutyronitrile as a reaction initiator were added dropwise over 3 hours, And then 0.5 part by weight of azobisisobutyronitrile was further added thereto. The mixture was continuously reacted for 3 hours, and diluted with butyl cellosolve so that the concentration of the obtained polymer was 40% after completion of the reaction.

Example  One: Antifogging  Produce

5.0 parts by weight of a melamine compound (trade name: cymel 303, manufactured by CYTEC) was mixed with the thermosetting acrylic polymer A in an amount of 5.0 parts by weight based on 100 parts by weight of the thermosetting acrylic polymer A obtained in Preparation Example 1 to obtain a coating composition. The obtained coating composition was diluted with butyl cellosolve to a solid content of 30% by weight based on the total weight of the total coating composition and 2 parts by weight of para-toluenesulfonic acid (NACURE 2530, solid content 25%, manufactured by King Industries) ) Was applied to a polycarbonate plate having a size of 70 mm x 150 mm by spraying and then dried and cured in a drier set at a temperature of 120 ° C for 10 minutes to form a coating film. The thickness of the cured coating film was 5 to 7 mu m.

Example  2: Antifogging  Produce

5.0 parts by weight of a melamine compound (trade name: cymel 303, manufactured by CYTEC) with 100 parts by weight of the thermosetting acrylic polymer B obtained in Preparation Example 2 was stirred and mixed with the thermosetting acrylic polymer B to obtain a coating composition. The obtained coating composition was diluted with butyl cellosolve to a solid content of 30% by weight based on the total weight of the total coating composition and 2 parts by weight of para-toluenesulfonic acid (NACURE 2530, solid content 25%, manufactured by King Industries) ) Was applied to a polycarbonate plate having a size of 70 mm x 150 mm by spraying and then dried and cured in a drier set at a temperature of 120 ° C for 10 minutes to form a coating film. The thickness of the cured coating film was 5 to 7 mu m.

Example  3: Antifogging  Produce

5.0 parts by weight of a melamine compound (trade name: cymel 303, manufactured by CYTEC) with 100 parts by weight of the thermosetting acrylic polymer C obtained in Preparation Example 3 was stirred and mixed with the thermosetting acrylic polymer C to obtain a coating composition. The resulting coating composition was diluted with butyl cellosolve to a solid content of 30% by weight based on the total weight of the total coating composition, 2 parts by weight of para-toluenesulfonic acid (NACURE 2530, solid content 25%, manufactured by King Industries ) Was applied to a polycarbonate plate having a size of 70 mm x 150 mm by spraying and then dried and cured in a drier set at a temperature of 120 ° C for 10 minutes to form a coating film. The thickness of the cured coating film was 5 to 7 mu m.

Example  4: Antifogging  Produce

5.0 parts by weight of a melamine compound (trade name: cymel 303, manufactured by CYTEC) with 100 parts by weight of the thermosetting acrylic polymer D obtained in Preparation Example 4 was stirred and mixed with the thermosetting acrylic polymer D to obtain a coating composition. The resulting coating composition was diluted with butyl cellosolve to a solid content of 30% by weight based on the total weight of the total coating composition, 2 parts by weight of para-toluenesulfonic acid (NACURE 2530, solid content 25%, manufactured by King Industries ) Was applied to a polycarbonate plate having a size of 70 mm x 150 mm by spraying and then dried and cured in a drier set at a temperature of 120 ° C for 10 minutes to form a coating film. The thickness of the cured coating film was 5 to 7 mu m.

Example  5: Antifogging  Produce

5.0 parts by weight of a melamine compound (trade name: cymel 303, manufactured by CYTEC) was mixed with the thermosetting acrylic polymer E in an amount of 5.0 parts by weight based on 100 parts by weight of the thermosetting acrylic polymer E obtained in Preparation Example 5 to obtain a coating composition. The resulting coating composition was diluted with butyl cellosolve to a solid content of 30% by weight based on the total weight of the total coating composition, 2 parts by weight of para-toluenesulfonic acid (NACURE 2530, solid content 25%, manufactured by King Industries ) Was applied to a polycarbonate plate having a size of 70 mm x 150 mm by spraying and then dried and cured in a drier set at a temperature of 120 ° C for 10 minutes to form a coating film. The thickness of the cured coating film was 5 to 7 mu m.

Example  6: Antifogging  Produce

5.0 parts by weight of a melamine compound (trade name: cymel 303, manufactured by CYTEC) with 100 parts by weight of the thermosetting acrylic polymer F obtained in Preparation Example 6 was stirred and mixed with the thermosetting acrylic polymer F to obtain a coating composition. The resulting coating composition was diluted with butyl cellosolve to a solid content of 30% by weight based on the total weight of the total coating composition, 2 parts by weight of para-toluenesulfonic acid (NACURE 2530, solid content 25%, manufactured by King Industries ) Was applied to a polycarbonate plate having a size of 70 mm x 150 mm by spraying and then dried and cured in a drier set at a temperature of 120 ° C for 10 minutes to form a coating film. The thickness of the cured coating film was 5 to 7 mu m.

Comparative Example  One: Antifogging  Produce

5.0 parts by weight of an organosilane compound (epoxy silane, KBM 403, manufactured by Shin Etsu) with 100 parts by weight of the thermosetting acrylic polymer A obtained in Preparation Example 1 was stirred and mixed with the thermosetting acrylic polymer A to obtain a coating composition . The obtained coating composition was diluted with butyl cellosolve to a solid content of 30% by weight based on the total weight of the total coating composition and 2 parts by weight of para-toluenesulfonic acid (NACURE 2530, solid content 25%, manufactured by King Industries) ), And the mixture was applied to a polycarbonate plate having a size of 70 mm x 150 mm by spraying, and dried and cured in a dryer set at a temperature of 120 ° C for 20 minutes to form a coating film. The thickness of the cured coating film was 5 to 7 mu m.

Comparative Example  2: Antifogging  Produce

5.0 parts by weight of an organosilane compound (aminopropyltrimethoxysilane, KBE 903, manufactured by Shin Etsu) with 100 parts by weight of the thermosetting acrylic polymer A obtained in Preparation Example 1 was stirred and mixed with the thermosetting acrylic polymer A, To obtain a composition. The obtained coating composition was diluted with butyl cellosolve to a solid content of 30% by weight based on the total weight of the total coating composition, 2 parts by weight of para-toluenesulfonic acid (NACURE 2530, solid content 25%, manufactured by King Industries ), And the mixture was applied to a polycarbonate plate having a size of 70 mm x 150 mm by spraying, and dried and cured in a dryer set at a temperature of 120 ° C for 20 minutes to form a coating film. The thickness of the cured coating film was 5 to 7 mu m.

[Experimental Method]

(1) Appearance: Visually check the transparency and smoothness of the cured coating film.

(2) Adhesion: The cured coating film is laminated 11 lines horizontally and vertically at intervals of 1 millimeter, and is pulled with a cellophane tape having a width of 25 mm.

(3) Aerobic: The cured coating film is left at 0 ° C for 10 seconds, and the aerobic experiment is carried out.

0: No fogging at all

△: disappear immediately after rainbow phenomenon

X: Yes

(4) Heat resistance: The cured coating film is left to stand in an atmosphere at 120 ° C for 240 hours, and then the appearance, aerobic property and adhesiveness are tested at the room temperature, and the yellowing degree is measured as follows.

For yellowing 0: △ YI <3

              Δ: ΔYI <5

               x:? YI> 5

(5) Water resistance: The cured coating film is dipped in an atmosphere at 40 ° C for 240 hours and then dried at room temperature for one hour, and then the appearance, aerobicity and adhesion are evaluated in the same manner as described above. Yellowing degree is measured as follows.

For yellowing 0: △ YI <3

             Δ: ΔYI <5

              x:? YI> 5

(6) Light resistance: The cured coating film was exposed to a temperature of 90 ° C and a relative humidity of 50% at 1,050 KJ / m 2 for 240 hours, and then tested for appearance, aerobic and adhesion at room temperature, .

For yellowing 0: △ YI <3

               Δ: ΔYI <5

                x:? YI> 5

(7) Acid resistance: Drop 5 drops of 0.1 mol / L sulfuric acid in the cured coating film, leave it at room temperature for 24 hours, wash it with water, dry it at room temperature for 1 hour, and then test.

The test results are shown in Table 3 below.

Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative Example 1 Comparative Example 2 Exterior 0 0 0 0 0 0 0 0 Attach 100/100 100/100 100/100 100/100 100/100 100/100 100/100 100/100 Aerobic 0 0 0 0 △ △ X 0 Heat resistance Exterior 0 0 0 0 0 0 X X Attachment 100/100 100/100 100/100 100/100 100/100 100/100 100/100 100/100 Aerobic 0 0 0 0 X X X X Sulfur modification △ △ △ △ △ 0 X X Water resistance Exterior 0 0 0 0 0 0 X X Attachment 100/100 100/100 100/100 70/100 100/100 100/100 0/100 0/100 Aerobic 0 0 0 X X X X X Sulfur modification 0 0 0 0 0 0 X X Light resistance Exterior 0 0 0 0 0 0 0 X Attachment 100/100 100/100 100/100 100/100 100/100 100/100 0/100 0/100 Aerobic 0 0 0 0 X X X X Sulfur modification △ △ △ X △ 0 0 X Acid resistance 0 0 0 X O 0 X X

Claims (16)

(Meth) acrylate, carboxyl group-containing monomer, N-methylol acrylamide, N-dimethylacrylamide, and N-dimethylamino (meth) At least two hydrophilic monomers selected from propyl methacrylamide; A hydroxyl group-containing (meth) acrylate monomer; And a thermosetting acrylic copolymer prepared by polymerizing a hydrophobic (meth) acrylate monomer; Diluting solvents; And a melamine compound crosslinking agent, Wherein the thermosetting acrylic copolymer comprises 20 to 80 parts by weight of the hydrophilic monomer based on 100 parts by weight of the solid content of the thermosetting acrylic copolymer; 2 to 40 parts by weight of the hydroxyl group-containing (meth) acrylate monomer; And 20 to 60 parts by weight of the hydrophobic (meth) acrylate monomer, Based on the total weight of the total coating composition, 5 to 50% by weight (based on solid content) of the thermosetting acrylic copolymer and 40 to 80% by weight of the diluting solvent; Wherein the cross-linking agent is contained in an amount of 0.1 to 30 parts by weight based on 100 parts by weight of the solid content of the thermosetting acrylic polymer. delete delete The antifogging coating composition for a headlamp lens according to claim 1, wherein the hydrophilic monomer comprises at least two monomers selected from a nonionic monomer, a cationic monomer and an anionic monomer. The antifogging coating composition for a headlamp lens according to claim 4, wherein the nonionic monomer is polyoxyethylene (meth) acrylate. 5. The composition of claim 4, wherein the cationic monomer is selected from the group consisting of dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, N-methylolacrylamide, N-dimethylacrylamide, Amide. &Lt; RTI ID = 0.0 &gt; 11. &lt; / RTI &gt; The antifogging coating composition for a headlamp lens according to claim 4, wherein the anionic monomer is a carboxyl group-containing monomer. [Claim 7] The composition of claim 7, wherein the carboxyl group-containing monomer is at least one selected from the group consisting of (meth) acrylic acid, maleic acid, fumaric acid, itaconic acid, monomethyl maleate, monobutyl maleate, monoethyl monoethyl itaconate, , And a modified acid including an unsaturated group. &Lt; RTI ID = 0.0 &gt; 11. &lt; / RTI &gt; The antifogging coating composition for a headlamp lens according to claim 1, wherein when the carboxyl group-containing monomer is contained as the hydrophilic monomer, the amount of the carboxyl group-containing monomer is 40 parts by weight or less based on 100 parts by weight of the solid content of the thermosetting acrylic copolymer. The antifogging coating composition for a headlamp lens according to claim 1, wherein the hydrophobic (meth) acrylate monomer is at least one selected from the group consisting of an aromatic unsaturated monomer and a (meth) acrylic acid alkyl ester monomer. [Claim 11] The method according to claim 10, wherein the aromatic unsaturated monomer is selected from styrene and vinyl toluene, and the (meth) acrylic acid alkyl ester monomer is at least one selected from the group consisting of methyl (meth) acrylate, ethyl (meth) acrylate, (Meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, cyclohexyl Antifogging coating composition for lamp lens. 2. The positive resist composition according to claim 1, wherein the hydroxyl group-containing (meth) acrylate monomer is at least one selected from the group consisting of hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate and hydroxybutyl Wherein the antifogging coating composition for a headlamp lens comprises: The method of claim 1, wherein the diluent solvent is selected from the group consisting of isopropyl alcohol, isobutanol, n-butanol, diacetone alcohol, methanol, methyl ethyl ketone, methyl isobutyl ketone, methyl cellosolve, Wherein the antifouling coating composition for a headlamp lens is at least one kind of antifogging coating composition for a headlamp lens. The composition according to claim 1, further comprising a curing accelerator selected from para-toluenesulfonic acid, dodecylbenzenesulfonic acid, dinonylnaphthalenesulfonic acid, dinonylnaphthalenesulfonic acid, alkyl acid phosphate, and phenyl acid phosphate An antifogging coating composition for a headlamp lens. The antifogging coating composition for a headlamp lens according to claim 1, further comprising at least one additive selected from a light stabilizer, a thickener, an antioxidant, a dispersant, and a neutralizing agent. The antifogging coating composition for a headlamp lens according to claim 1, wherein the thermosetting acrylic copolymer is produced by radical polymerization.