KR20140148332A

KR20140148332A - Paint set for spot-repairing a matte-painted surface

Info

Publication number: KR20140148332A
Application number: KR20140074945A
Authority: KR
Inventors: 김재익; 이윤수; 이건재; 이용희
Original assignee: 유한회사 피피지코리아
Priority date: 2013-06-21
Filing date: 2014-06-19
Publication date: 2014-12-31
Also published as: WO2014204268A1; KR101580800B1

Abstract

The present invention relates to a set of coatings for partial quenching of a non-light-cured coating surface and a method for partially modifying a non-cured coating surface using the same, and more particularly, (SPOT REPAIR) of a part of the surface of the coating layer is removed, but the overspray dust generated during application of the CLEAR 1 paint or the coating formed on the outer surface of the coating interface is removed by using a Cree 2 paint Thereby providing a matte-coated surface in the initial state without a polishing operation, and a method for modifying a portion of a matte-coated surface using the same.

Description

{PAINT SET FOR SPOT-REPAIRING A MATTE-PAINTED SURFACE}

[0001] The present invention relates to a set of coatings for partial correction of a non-light-coated surface and a method for partially modifying a non-coated surface using the same, more specifically, , The uneven paint formed on the outer edge of the coating interface at the time of applying the clear coat 1 is removed by using the Cree 2 paint so that the uncoated paint surface can be provided in the initial state without the polishing operation, And a method for partially modifying a non-coated surface using the same.

Generally, automobiles usually have high gloss in order to enhance the appearance. In the past, polishing was performed at the final stage in the spot repairs, and high gloss, which is a unique characteristic of the glossy coating, was found.

Specifically, as shown in FIG. 1 and FIG. 2, a step S100 of performing a SANDING process on a partially defective portion of the glossy coated surface is performed, and the coloring of the partially coated defect portion After applying a color coating (S200), a step (S300) of applying a normal clearcoat to the partially-defective area coated with the color coating is performed, and the outer boundary of the partially-modified surface (S400) of applying a normal thinner to the workpiece and then performing a step S500 of curing the workpiece through the steps S100 to S400. Finally, (S600), and Patent Documents 1 to 3 disclose related arts.

In the above step S200, the expression "color paint as the color of the undercoat surface" should be interpreted to mean a color paint similar to the color of the undercoat surface.

However, when the above-described process is applied to the matte coating surface, that is, when the polishing process is performed on the matte coating surface, the polished portion becomes lustrous and the inherent characteristic of the matte disappears, The polishing process must be eliminated.

Therefore, until now, there has been no partial correction method for the non-painted coating surface, which has caused a difficulty in mass production of a matte finished vehicle.

Korean Patent Laid-Open Publication No. 10-2012-0090933 "Partial repair method of scratch resistance film & Korean Patent Laid-Open Publication No. 10-1999-008955 "Partial painting method of automobile exterior scratches" Korean Patent Laid-Open Publication No. 10-2004-0068519 "

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to partially modify a partial defect portion of a matte coating surface using a Cree 1 paint which can minimize a difference in gloss even in a wide coating film range, And the uneven paint formed on the outer surface of the coating interface is removed by using the Cree 2 paint so that the uncoated paint surface can be provided in the initial state without the polishing operation. A partial correction method is provided.

In addition, as described above, by using the Cree 1 paint and the Cree 2 paint, it is possible to provide a matte paint surface in an initial state without a polishing operation, thereby providing strong adhesion, moisture resistance and weather resistance, In addition to providing surface, it also provides a part-fixing paint set for non-matting painted surfaces, which makes it possible to minimize the dependency on the entire vehicle re-coating by complementing the productivity deterioration which is caused by difficulty in partial modification, Another object of the present invention is to provide a method for partially modifying a non-painted surface.

The present invention relates to a coating composition for partial fixation on a non-light-coated surface, which comprises a clear coat 1 applied to a partial defect portion of a non-light-coated surface to be partially modified, Wherein the clearcoat 1 paint comprises a thermosetting acrylic resin, an n-butylated melamine resin and a light extinguishing agent, wherein the clearcoat 1 paint is a thermosetting acrylic resin, n-butylate The present invention is directed to a set of paints for partial correction of a non-painted surface including a melamine resin.

The term "clear paint" means a paint which can see the lower part of the paint through the paint and may have any color or other visual effect.

At this time,

14 to 40% by weight of a thermosetting acrylic resin, 13 to 18% by weight of a n-butylated melamine resin, 20 to 25% by weight of a matting agent, 0.9 to 4% by weight of an acid catalyst, 12 to 14% by weight of ETHYLENE GLYCOL MONOHEXYL ETHER, 5 to 10% by weight of ETHYL 3-ETHOXYPROPANOATE, 5 to 7% by weight of AROMATIC HYDROCARBON MIXTURE, 3 to 5 wt% of N-BUTYL ACETATE, 0.9 to 2 wt% of a benzotriazole UV absorber, 0.1 to 0.5 wt% of HALD (HINDERED AMINE LIGHT STABILIZER) 0.1 to 0.5% by weight.

On the other hand, the quencher used in the above-mentioned Clear 1 paint is,

A silica quencher having a particle size of 1 to 10 mu m, or a silica quencher having a particle size of 10 to 30 mu m.

On the other hand, the above-

0.5 to 5% by weight of a thermosetting acrylic resin, 0.4 to 3% by weight of a n-butylated melamine resin, 0.1 to 2% by weight of an acid catalyst, 16 to 35% by weight of ethynylbenzene, 16 to 35% by weight of ethylbenzene, 20 to 22% by weight of an aromatic hydrocarbon mixture, 13 to 15% by weight of ethylacetate, 11 to 13% by weight of methyl ethyl propyleneglycol acetate and 20 to 24% by weight of an aromatic hydrocarbon mixture .

On the other hand, the acid catalyst used for the Cree 1 paint and the Cree 2 paint,

It is preferably a solution of PHENYL ACID PHOSPHATE.

In addition, the present invention provides a method of modifying a non-

SANDING (P100) a partial defect portion of the non-light-coated surface;

(P200) of applying a color coating material having the same color as that of the undercoating surface to the sandblasted partial defects;

Applying (P300) a Cree 1 paint to at least a part of the partially defective part painted with the color paint;

Applying (P400) a Cree 2 paint to at least a portion of the outer boundary of the partially modified surface by the Cree 1 paint; And

The step P500 of curing the work site through the steps P100 to P400,

Lt; / RTI >

Wherein the Cream 1 paint comprises a thermosetting acrylic resin, an n-butylated melamine resin and a quencher, and the Cream 2 paint comprises a thermosetting acrylic resin and an n-butylated melamine resin. As another solution to the problem.

At this time, the step (P300) of applying the clear coat (1)

It is preferable to apply the coating material to the partially defective portion coated with the color paint at a thickness of 1 to 25 탆 and to apply the defective portion to the outer side in a downward sloping manner.

In addition, the step (P500)

It is preferably exposed to an IR (Infrared RAY) lamp or an industrial dryer at a temperature of 100 to 120 DEG C at a distance of 25 to 30 cm for 10 to 20 minutes.

According to the present invention, it is possible to introduce the optimized method that can easily remove the stain on the coating interface without polishing, and to introduce it into the domestic market for the first time It is effective.

1 is a flow chart illustrating a method of modifying a part of a general glossy coated surface
Fig. 2 is a conceptual diagram of Fig. 1
FIG. 3 is a flowchart illustrating a method for modifying a portion of a matte-coated surface using a set of coatings for partial correction of a non-coated surface according to an embodiment of the present invention
Fig. 4 is a conceptual diagram of Fig. 3

In order to achieve the above-mentioned effects, the present invention relates to a set of coatings for partial quenching of a non-light-coated surface and a method for modifying a non-coated surface using the same, wherein only the parts necessary for understanding the technical structure of the present invention are described, The description of the present invention will be omitted so as not to obscure the gist of the present invention.

Hereinafter, the paint set for partial surface modification of a non-painted surface according to the present invention will be described in detail first, and a method for partially applying a non-painted surface using the paint set will be described in detail.

First, a set of coatings for partial surface modification of a non-light-coated surface according to the present invention comprises a set of a Cree 1 paint and a Cree 2 paint, wherein the Cree 1 paint is applied to a partial defect portion of a non- REPAIR), and the CLEAR 2 paint is applied to the peripheral boundary portion of the partially modified surface by the CLEAR 1 paint to remove the unevenness of the boundary portion.

More specifically, the Cree 1 paint comprises 14 to 40% by weight of a thermosetting acrylic resin, 13 to 18% by weight of a n-butylated melamine resin, 20 to 25% by weight of a matting agent, , 0.9 to 4 wt.% Of an acid catalyst, 12 to 14 wt.% Of ethylene glycol monooleyl ether, 5 to 10 wt.% Of ethyl 3-ethoxypropanoate, 5 to 7% by weight of AROMATIC HYDROCARBON MIXTURE, 3 to 5% by weight of n-butyl acetate, 0.9 to 2% by weight of benzotriazole UV absorber, 0.1 to 2% by weight of HINDERED AMINE LIGHT STABILIZER 0.1 To 0.5% by weight and polyacrylate (POLYACRYLATE) 0.1 to 0.5% by weight.

The thermosetting acrylic resin used for the Cree 1 paint is added for coating film formation and durability and is used in an amount of 14 to 40% by weight. If the amount is less than 14% by weight, the difficulty of forming a film and the durability If it exceeds 40% by weight, a large amount of a curing agent may be required.

The n-butylated melamine resin used for the Cree 1 paint is added for curing the thermosetting polymer and is used in an amount of 13 to 18% by weight. When the amount of the n-butylated melamine resin is less than 13% by weight, If it exceeds 18% by weight, the coating film becomes hard and the impact resistance may be lowered.

The quencher used in the Cree 1 paint is added for a matting effect. Preferably, a silica quencher having an average particle size of 1 to 10 mu m or a silica quencher having an average particle size of 10 to 30 mu m is used.

In this case, the quenching agent is used in an amount of 20 to 25% by weight. When the amount of the quencher is less than 20% by weight, there is a fear that the quenching power is lowered. When the amount is more than 25% by weight,

Meanwhile, in the present invention, by dispersing the quencher in a stable state, it is possible to obtain characteristics of a paint similar to a general clear paint. To this end, it is important to disperse the quencher uniformly in the resin so that there is no steric hindrance between quenchers. In the present invention, in order to disperse the quencher in a uniform and stable state, a quencher is dispersed in an n-butylate melamine resin together with an aromatic hydrocarbon mixture and ethyl 3-ethoxypropanoate, The dispersion is pulverized at a working condition of 2,000 to 3,000 rpm to prepare a dispersion containing an antifoaming agent having an average particle size of 1 to 10 mu m or 10 to 30 mu m.

Here, the aromatic hydrocarbon mixture and ethyl 3-ethoxypropanoate will be described later.

On the other hand, when the average particle size of the quencher is out of the above range, the quencher may not be stably dispersed.

Accordingly, as described above, since the thermosetting acrylic resin, the n-butylated melamine resin, and the light extinguishing agent do not cause a large difference in luster even at a low film thickness after the partial correction worker, Minimize change.

The acid catalyst used for the Cree 1 paint is added to maintain stable physical properties of the coating film even at a low temperature of 100 to 120 ° C and to improve adhesion, and a solution of PHENYL ACID PHOSPHATE is used.

If the amount is less than 0.9 wt%, it may be difficult to obtain a stable coating film at a low temperature. When the amount of the acid catalyst is more than 4 wt%, a hard coating film may be obtained. However, there is a possibility that a problem of deterioration of impact resistance occurs.

The ethylene glycol monohexyl ether used in the Cree 1 paint is a ground solvent compound and is added in order to minimize the stain caused by the cleavage of the boundary portion, and 12 to 14% by weight is used. When the amount is less than 12% , And there is a fear that the flow phenomenon becomes worse. When it exceeds 14% by weight, there is a fear that the work on the vertical surface due to the decrease in the flowability becomes difficult.

Ethyl 3-ethoxypropanoate used in the Cree 1 paint is added in order to stabilize dispersion of the quencher and to improve the wettability of the coating film upon coating the coating, and it is used in an amount of 5 to 10 wt% If the amount is less than 5% by weight, the wettability may be deteriorated when the coating is applied. If the amount is more than 10% by weight, the coating film formation may be wettability but cause deterioration of flowability.

The aromatic hydrocarbon mixture used for the Cree 1 paint is added in order to stabilize dispersion of the quencher and to improve the wettability of the coating film at the time of coating the paint. It is used in an amount of 5 to 7 wt% %, The wettability may deteriorate when the coating is applied. When the content is more than 7% by weight, the coating film formation may be a cause of deterioration of flowability although the wettability is good.

Here, the aromatic hydrocarbon mixture may be a solvent in which the aromatic hydrocarbon 100 and the aromatic hydrocarbon 150 are mixed. The aromatic hydrocarbon mixture may include the aromatic hydrocarbon 100 and the aromatic hydrocarbon 150 in a ratio of 1: 9 to 9: 1 (v / v), preferably 5: 5 (v / v) .

The aromatic hydrocarbon 100 may include 1,2,4-trimethylbenzene, cumene, mixed xylene, 1,2,3-trimethylbenzene, 1-ethyl-2-methylbenzene and propylbenzene, , Preferably Kocosol-100 (SK refinery, melting point: about 159-176 DEG C). The aromatic hydrocarbon 150 may include 1,2,3-trimethylbenzene, 1-methyl-2-propylbenzene, 1,2,4,5-tetramethylbenzene, naphthalene and the like, preferably Kocosol-150 (SK refinery, melting point: about 174-214 DEG C).

The n-butyl acetate used in the Cree 1 paint is added in order to facilitate the drying of the coating surface during coating. When the amount of the n-butyl acetate used is less than 3% by weight, drying of the surface may be delayed If the content is more than 5% by weight, there is a risk of pinholes or POPPING due to rapid surface drying.

The benzotriazole UV absorber used in the Cree 1 paint is added to reinforce the weatherability of the coating film, and 0.9 to 2% by weight is used. When the amount is less than 0.9% by weight, color and water resistance There is a fear of a change, and if it exceeds 2% by weight, the paint price will be raised.

The HALS used in the Cree 1 paint is also added to reinforce the weatherability of the coating film. It is used in an amount of 0.1 to 0.5% by weight. When the amount is less than 0.1% by weight, there is a fear of a change in color and physical properties If it exceeds 0.5% by weight, the paint price will be raised.

The polyacrylate used for the Cree 1 paint is added to adjust the surface of the coating film when coating the coating, and 0.1 to 0.5 wt% is used. When the amount is less than 0.1 wt%, it is difficult to obtain a smooth coating film. If the amount exceeds the above range, the surface CRATER of the coating film may occur.

On the other hand, the Cree 2 paint comprises 0.5 to 5% by weight of a thermosetting acrylic resin, 0.4 to 3% by weight of n-butylated melamine resin, 0.1 to 2% by weight of an acid catalyst, 16 to 35% by weight of ethylbenzene, 13 to 15% by weight of ethyl acetate, 11 to 13% by weight of methyl ethyl propylene glycol acetate, and 20 to 24% by weight of an aromatic hydrocarbon mixture.

The thermosetting acrylic resin used for the Cree 2 paint is added for coating effect and durability enhancement at the same time for 0.5 to 5 wt%. When the amount is less than 0.5 wt%, it is difficult to obtain a glossy coat If it is more than 5% by weight, the luster becomes high during coating, which may cause color unevenness.

The n-butylated melamine resin used for the Cree 2 paint is added for dense crosslinking of the coating film in the thermosetting type paint, and 0.4 to 3% by weight is used. When the amount is less than 0.4% by weight, It is difficult to obtain a stable coating film. If it exceeds 3% by weight, the impact resistance of the coating film may be deteriorated.

The acid catalyst used for the Cree 2 paint is added in order to obtain a stable coating film even at a low temperature and 0.1 to 2% by weight is used. When the amount is less than 0.1% by weight, the stability of physical properties such as adhesion is poor. %, The coating film becomes hard, and there is a fear of lowering the impact resistance.

Ethylbenzene used in the above-mentioned Cree 2 paint is added as a solvent having excellent drying and dissolving power so as to soften the rough surface due to warping of the surface of the film, and 16 to 35% by weight is used. When the content is less than 10% by weight, it may be difficult to adjust the surface of the warp portion. When the content exceeds 35% by weight, a part of the warp may be dissolved and it may become difficult to obtain a stable coating surface.

The xylene used for the Cree 2 paint is added to adjust the dryness of the surface of the coating film as a quick drying solvent. It is used in an amount of 20 to 22% by weight. When the amount is less than 20% by weight, If it exceeds 22 wt%, pinholes and popping may occur.

When the amount of the ethyl acetate used is less than 13% by weight, the coating surface may be dried late, and if it is used in an amount of less than 15% by weight, , Pinholes and popping may occur.

Methyl ethyl propyleneglycol acetate used in the Cree 2 paint is a ground solvent compound and is added in order to minimize the unevenness of the crease 1 bleeding part. It is used in an amount of 11 to 13% by weight. When the amount is less than 11% , And there is a fear that the flow phenomenon becomes worse. If it exceeds 13% by weight, flowability is not good, and there is a fear that working on the vertical surface becomes difficult.

When the amount of the aromatic hydrocarbon mixture used is less than 20% by weight, the wettability may deteriorate. When the amount of the aromatic hydrocarbon mixture used is less than 24% by weight, If it is exceeded, flowability is not good and vertical surface work may be difficult.

The aromatic hydrocarbon 100 may include 1,2,4-trimethylbenzene, cumene, mixed xylene, 1,2,3-trimethylbenzene, 1-ethyl-2-methylbenzene and propylbenzene, Kocosol-100 (SK refinery, melting point: about 159-176 DEG C). The aromatic hydrocarbon 150 may include 1,2,3-trimethylbenzene, 1-methyl-2-propylbenzene, 1,2,4,5-tetramethylbenzene, naphthalene and the like, preferably Kocosol-150 (SK refinery, melting point: about 174-214 DEG C).

The Cree 2 paint preferably does not contain a quencher.

Next, as shown in FIG. 3 and FIG. 4, a method of modifying a non-light-coated surface using a matte coating for partial surface modification according to the present invention includes a sanding step (P100), a step of applying a color coating A step P300 of applying a clear coat 1, a step P400 of applying a clear coat 2, and a step P500 of hardening a work site.

The step (P100) for performing the sanding process is a step of performing a sanding process on a partial defect portion on the non-light-coated surface, and sanding is performed using ordinary sandpaper (SAND PAPER).

The step (P200) of applying the color coating material is a step of applying a color coating material having the same color as that of the undercoating surface to the sanding-treated partial defects, and is coated by a normal hand gun spray coating method.

The step (P300) of applying the clear coat (1) is a step of applying a clear coat (1) to a partial defect portion coated with the color coating material, To the outer side in a downward sloping manner to spread the coating boundary of the Creer 1 paint broadly and gently.

At this time, when the thickness of the Cree 1 paint is less than 1 탆, the work is difficult and the peeling phenomenon may increase. If it exceeds 25 탆, the gloss may increase.

The step (P400) of applying the clear coat (2) is a step of touching up and applying the clear coat (2) to the peripheral boundary portion of the partially modified surface by the clear coat (1) As a result, it is meant to repair and repair painted portions or damaged portions of the paint, but in the present invention, it is referred to as a repaired portion.

The step (P500) of hardening the working part is a step of hardening the working part through the steps (P100 to 400). The step of hardening the working part is performed at a temperature of 100 to 120 DEG C at a distance of 25 to 30 cm using an IR lamp or an industrial dryer, After curing for 10 to 20 minutes, if there is no smudge, wipe with cloth to finish the work.

At this time, when the curing condition (distance, temperature and time) is out of the above range, it is difficult to obtain a coating film having stable physical properties.

On the other hand, since the Cree 1 paint and the Cree 2 paint have already been described in detail, a detailed description thereof will be omitted.

Hereinafter, the present invention will be described in more detail based on the following examples, but the present invention is not limited to the examples.

1. Manufacture of Cree 1 paint

(Example 1)

5% by weight of a silica quencher (ACEMATT OK 412, Degussa AG) 20% by weight, a mixture of aromatic hydrocarbons (Kocosol-100 (SK refinery) and Kocosol-150 (SK refinery) 5: 5 5% by weight of ethyl 3-ethoxypropanoate (EASTMAN CHEMICAL COMPANY) was dispersed in 13% by weight of n-butylated melamine resin (Aekung Chemical) and milled at a working condition of 2,000 to 3,000 rpm using a mill, A dispersion comprising a silica quencher having a particle size of 10 to 30 m was prepared.

40% by weight of a thermosetting acrylic resin (hydroxy acrylic resin, PPG), 0.9% by weight of a phenyl acid phosphate solution (RHODIA INC.) As an acid catalyst, 12% by weight of ethylene glycol monohexyl ether (DOW CHEMICAL) , 3 wt% of n-butyl acetate (INEOS NV (BELGIUM)), 0.9 wt% of benzotriazole UV absorber (EVERLIGHT CHEMICAL TAIWAN (VIA NYFC)), 0.1 wt% of HALS (SEBACATE, EVERLIGHT CHEMICAL TAIWAN % And 0.1 wt% of a polyacrylate (BYK-CHEMIE) additive were mixed to prepare a Creer 1 paint.

(Example 2)

7% by weight of a silica quencher (ACEMATT OK 412, Degussa AG) 25% by weight, a mixture of aromatic hydrocarbons (Kocosol-100 (SK refinery) and Kocosol-150 (SK refinery) 5: 5 10% by weight of ethyl 3-ethoxypropanoate (EASTMAN CHEMICAL COMPANY) was dispersed in 18% by weight of n-butylated melamine resin (Aekung Chemical) and pulverized using a mill at a working condition of 2,000 to 3,000 rpm, A dispersion comprising a silica quencher having a particle size of 1-10 mu m was prepared.

14 wt% of a thermosetting acrylic resin (hydroxy acrylic resin, PPG), 4 wt% of a phenyl acid phosphate solution (RHODIA INC.) As an acid catalyst, 14 wt% of ethylene glycol monohexyl ether (DOW CHEMICAL) 5% by weight of n-butyl acetate (INEOS NV (BELGIUM)), 2% by weight of benzotriazole UV absorber (EVERLIGHT CHEMICAL TAIWAN, VIA NYFC), 0.5% by weight of HALS (SEBACATE, EVERLIGHT CHEMICAL TAIWAN By weight and 0.5% by weight of a polyacrylate (BYK-CHEMIE) additive were mixed to prepare a Cree 1 paint.

(Comparative Example 1)

A clear coat 1 was prepared in the same manner as in Example 1 except that a silica quencher was not used.

(Comparative Example 2)

A clear coat 1 was prepared in the same manner as in Example 2 except that 30 wt% of silica quencher was used.

2. Evaluation of physical properties of Cree 1 paint

The properties of the Cree 1 paint according to Examples 1 and 2 and Comparative Examples 1 and 2 were evaluated by the following methods, and the results are shown in Table 1 below.

1) Particle size: Particle size measurement with Hegman gauge (HEGMAN GAUGE, 0-50 μm, BYK-Gardner / GERMANY)

2) Gloss: 60 ° gloss is measured with a gloss meter (Cat No. 4520, BYK-Gardner / GERMANY) and gloss should be 15-25

3) In-vessel state: no particles, no foreign matter, no hard lumps and uniformly dispersed state

4) Storage stability: After standing in an oven (ET-TC-3435, Ileatech) for 72 hours at 50 ° C, viscosity change

5) Water resistance: After immersing in deionized water at 40 ° C for 240 hours, the film was left unchanged for 1 hour and the adhesion was good (Measuring instrument: RBC-10, JEIO TECH / KOREA)

6) Impact resistance: It should not crack and peel off the coating film by dropping 500g weight and should be more than 20cm (measuring instrument: DUPONT (1819), TAIYU / JAPAN)

7) Scratch resistance: Measure with CAR WASH TEST device (PART No. 413-000, A.K.G / GERMANY) (20 ° GLOSS retention rate)

8) Painting workability: The paint is sprayed to the ground. Good spraying ability and good wetting property.

Item Example 1 Example 2 Comparative Example 1 Comparative Example 2 Particle size of paint 25 micron 5 microns 25 micron 25 micron Polish
(25 microns film) 20 20 92 5 Polish
(Film 10 microns) 10 16 92 5 Polish
(5 microns film) 5 10 90 5 Container state ◎ ◎ ◎ ○ Storage stability of paints ○ ○ ○ △ Early adhesion of coating ◎ ◎ ◎ ◎ Water resistance of coating ◎ ◎ ◎ ◎ Impact resistance 40cm 40cm 40cm 40cm My Scratchy Castle 95% 95% 65% 95% Painting workability △ ◎ X X ?: Very good,?: Good,?: Fair, X: poor

As shown in Table 1, the clear coat 1 according to Examples 1 and 2 has excellent storage stability as compared with Comparative Examples 1 and 2, and a coating film having little change in gloss according to the thickness of the coating film is obtained. Water resistance, impact resistance, and the like.

3. Manufacture of Cree 2 paint

(Example 3)

0.5% by weight of a thermosetting acrylic resin (hydroxyacrylic resin, PPG), 0.4% by weight of n-butylated melamine resin (Aekung Chemical), 0.1% by weight of phenyl acid phosphate phosphate solution (RHODIA INC.) As an acid catalyst, , 13 wt% of ethyl acetate (99.5%, RHODIA, INC.), 11 wt% of methyl ethyl propylene glycol acetate (SHINY CHEMICAL INDUSTRIAL) and 20 wt% of an aromatic hydrocarbon mixture (Kocosol 20% by weight of a 5: 5 (v / v) mixture of K-100 (SK refinery) and Kocosol-150 (SK refinery).

(Example 4)

5% by weight of thermosetting acrylic resin (hydroxy acrylic resin, PPG), 3% by weight of n-butylated melamine resin (Aekung Chemical), 2% by weight of phenyl acid phosphate phosphate solution (RHODIA INC.) As acid catalyst, , 15 wt% of ethyl acetate (99.5%, RHODIA, INC.), 13 wt% of methyl ethyl propylene glycol acetate (SHINY CHEMICAL INDUSTRIAL) and 16 wt% of an aromatic hydrocarbon mixture (Kocosol 24% by weight of a 5: 5 (v / v) mixture of 100% (SK refinery) and Kocosol-150 (SK refinery).

(Comparative Example 3)

2.0% by weight of a thermosetting acrylic resin (hydroxy acrylic resin, PPG), 1.0% by weight of n-butylated melamine resin (Aekung Chemical), 0.3% by weight of a silica quencher (ACEMATT OK 412, Degussa AG) % Of ethyl acetate (99.5%, RHODIA, INC.) 15% by weight of ethyl benzene (CEPSA), 25% by weight of ethyl benzene (CEPSA), 21% by weight of xylene (SAMSUNG TOTAL PETROCHEMICALS) , 12 wt% of methyl ethyl propylene glycol acetate (SHINY CHEMICAL INDUSTRIAL) and 23.4 wt% of an aromatic hydrocarbon mixture (5: 5 (v / v) mixture of Kocosol-100 (SK refinery) and Kocosol- To prepare a Cream 2 paint.

(Comparative Example 4)

A mixture of 0.3 wt% of a phenyl acid phosphate solution (RHODIA INC.) As an acid catalyst, 26 wt% of ethylbenzene (CEPSA), 22 wt% of xylene (SAMSUNG TOTAL PETROCHEMICALS), 16 wt% of ethyl acetate (RHODIA, INC.), And 23.7% by weight of a mixture of 12% by weight of SHINE CHEMICAL INDUSTRIAL and 5: 5 (v / v) mixture of an aromatic hydrocarbon mixture (Kocosol-100 (SK refinery) and Kocosol- .

4. Evaluation of physical properties of Cree 2 paint

The physical properties of the Cree 2 paints according to Examples 3 and 4 and Comparative Examples 3 and 4 were evaluated by the following methods, and the results are shown in Table 2 below.

1) Appearance: Luster level (visual determination)

2) In-vessel state: no dust, foreign matter, solid mass, uniformly dispersed state

3) Storage stability: After standing at 50 ° C for 72 hours in an oven (ET-TC-3435, Iretec), viscosity change

4) Water resistance: After immersion in ultrapure water at 40 ° C for 240 hours, the film should remain unchanged after 1 hour, and good adhesion (RBC-10, JEIO TECH / KOREA)

5) Painting workability: Release of the paint. Good spraying and good wetting of the substrate. Gloss of the edge of the paint should be glazed to the surroundings (Measuring instrument: Ci5000, ATLAS / USA)

Item Example 3 Example 4 Comparative Example 3 Comparative Example 4 Exterior Bright Bright Hermaphrodite Volatile solvent Container state △ △ △ - Storage stability of paints △ △ △ - Early adhesion of coating ◎ ◎ ◎ - Water resistance of coating ◎ ◎ ◎ - Painting workability ◎ ○ X X ?: Very good,?: Good,?: Fair, X: poor

As shown in Table 2 above, the Cree 2 paints according to Examples 3 and 4 had the same coating surface as that of Comparative Examples 3 and 4, without polishing the change in gloss caused by the creasing of the Cree 1 paint .

5. Evaluation of Partial Correction Method for Non-painted Coating Surface

Using the Cree 1 paint according to Example 1 and the Cree 2 paint according to Example 3, the surface as shown in Table 3 was partially modified, and the results are also shown in Table 3.

Corrective action sequence Example 5 Example 6 Comparative Example 5 Comparative Example 6 Sanding
In step P100, Sandpaper Sandpaper Sandpaper Sandpaper The step of applying the color paint (P200) Color base Color base Color base Color base Applying the Cree 1 paint (P300) Cree 1 Cree 1 Cree 1 Cree 1 Drying step - dry - - Applying the Cree 2 paint (P400) Cree 2 Cree 2 - - Step of applying thinner - - - Thinner Curing the working site (P500) Hardening Hardening Hardening Hardening Polishing step - - - polishing Exterior quality ○ △ X X Painting workability ◎ ◎ X X ?: Very good,?: Good,?: Fair, X: poor

As shown in the above Table 3, it can be seen that Examples 5 and 6 using both the CLEAR 1 paint and CLEAR 2 paint are superior in appearance quality and paint workability as compared with Comparative Examples 5 and 6.

A step P300 of applying a clear coat 1, a step P400 of applying a clear coat 2, and a step P500 of applying a coat of a color coat P500 ) And Comparative Example 5 in which there is no step (P400) of applying the CLEAR 2 paint in Examples 5 and 6, and Comparative Example 6 in which the thinner is applied and the polishing step are performed, the appearance quality and the painting workability Is excellent.

A step P300 of applying a clear coat 1, a step P400 of applying a clear coat 2 and a step P500 of hardening a work site P500, ) Of Example 6 is superior to Example 6 in which a separate drying step is carried out before application of the CLEAR 2 paint is superior in appearance quality and painting workability.

As described above, the partial-setting paint set for a non-glazed coated surface according to the present invention and the method for partially modifying a non-glazed coated surface using the same will be described with reference to the preferred embodiments and its superiority is confirmed. However, 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 in the appended claims.

S100: Step of SANDING
S200: Step of applying color paint
S300: Step of applying a clear paint
S400: Step of applying thinner
S500: CURING the working area
S600: Polishing step
P100: Steps to sanding
P200: Step of applying color paint
P300: Step of coating Cree 1 paint
P400: Step of coating Cree 2 paint
P500: Curing step of work area

Claims

In a paint set for a partially modified (SPOT REPAIR) non-painted surface,
A Cree 1 paint which is applied to a partly defective part of the non-painted surface to be partially modified, and
And a clear coat (2) applied to an outer boundary portion of the partially modified surface by the clear coat (1) to remove boundary spot spots,
Wherein the Cream 1 paint comprises a thermosetting acrylic resin, an n-butylated melamine resin and a light extinguishing agent, and the Cream 2 paint comprises a thermosetting acrylic resin and an n-butylated melamine resin. Paint set.

The method according to claim 1,
Wherein the Cree 1 paint comprises 14 to 40% by weight of a thermosetting acrylic resin, 13 to 18% by weight of an n-butylated melamine resin and 20 to 25% by weight of a quencher.

3. The method of claim 2,
Wherein the Cree 1 paint further comprises 0.9 to 4% by weight of an acid catalyst.

The method of claim 3,
Wherein the Cree 1 paint is selected from the group consisting of ethylene glycol monohexyl ether, ethyl 3-ethoxypropanoate, aromatic hydrocarbon mixtures, n-butyl acetate, benzotriazole UV absorbers, hindered amine light stabilizers and polyacrylates Wherein the coating composition further comprises at least one member selected from the group consisting of a fluorine-containing resin and a fluorine-containing resin.

The method according to claim 1,
Wherein the light extinguishing agent is a silica light extinguishing agent having a particle size of 1 to 10 μm or a silica light extinguishing agent having a particle size of 10 to 30 μm.

The method according to claim 1,
Wherein the Cream 2 paint comprises 0.5 to 5% by weight of a thermosetting acrylic resin and 0.4 to 3% by weight of n-butylated melamine resin.

The method according to claim 6,
Wherein the Cream 2 paint further comprises 0.1 to 2% by weight of an acid catalyst.

8. The method of claim 7,
The Cream 2 paint further comprises 16 to 35% by weight of ethylbenzene, 20 to 22% by weight of xylene, 13 to 15% by weight of ethyl acetate, 11 to 13% by weight of methylethylpropylene glycol acetate and 20 to 24% by weight of an aromatic hydrocarbon mixture As a part of the surface of the non-coated surface.

The method according to claim 1,
And the Cree 2 paint does not contain a quenching agent.

8. The method according to claim 3 or 7,
Wherein the acid catalyst is a phenyl acid phosphate solution.