KR101922412B1 - Glossless and metallic paint and painting method using the same - Google Patents

Abstract

TECHNICAL FIELD [0001] The present invention relates to a matte metallic paint and a coating method using the same, more specifically, as a paint used for coating a plastic material and / or a metal material, And a coating method of a coating material using the coating material.

Description

TECHNICAL FIELD The present invention relates to a matte metallic paint and a coating method using the same,

TECHNICAL FIELD [0001] The present invention relates to a matte metallic paint which can be applied on a plastic or metal surface to give a luxurious aesthetic feeling, and a coating method using the same.

Generally, a paint is generally referred to as a fluid material which is coated on the surface of a solid material such as paint or enamel to form a solid film, protects the surface of the object, and displays various colors to beautify the surface of the object.

Such paints are generally formed to exhibit a gel-like flow state, and are generally formed so that they can be dried quickly when they are painted or applied to the surface of an object. In recent years, a variety of environmentally friendly coatings have been developed in accordance with environmental factors and societal changes, and coatings having improved adhesion, chemical resistance, weatherability, and workability have been developed depending on the environment to be coated or applied.

Since the conventional paint is primarily intended to protect the surface of an object to be applied or to be coated from the outside or to form the color of the applied paint to appear outside, And there is a problem that it is very difficult to form a surface texture such as a metal material.

In order to solve the above problems, a method of manufacturing a paint composition capable of expressing the texture of a metal has been proposed in the literature such as Korean Patent Laid-Open No. 10-2010-0006457 or Korean Patent Laid-open No. 10-2014-0057650, There is a problem in that various types of metal surface texture can not be formed depending on the surface texture, and there is a problem that the glossiness is high and it is not luxurious.

In the case of a medical device or an electronic product, there is a growing demand for high-performance functional paints capable of minimizing and preventing electromagnetic waves generated from the devices, because electromagnetic waves can not be generated much outside.

In addition, the existing paint has insufficient adhesiveness and bonding property, so that the primer is first applied to the surface of the plastic or metal on which the paint is painted, and then the paint is painted, so that the painting process is complicated and takes a long time.

Korean Patent Publication No. 10-2010-0006457 (2010.01.19)

Accordingly, the present inventors have made efforts to develop paints with superior aesthetics while improving the paintability of existing paints and adding additional functionalities, and as a result, developed a matte metallic paint having an optimum composition and composition ratio. That is, the present invention provides a novel matte methylic paint and a coating method using the same.

In order to solve the above problems, the matte metallic paint of the present invention comprises a binder resin; A pigment comprising at least one selected from inorganic pigments and organic pigments; Aluminum flakes; filler; Pigment dispersion stabilizers; Adhesiveness improver; Organic diluents including xylene, toluene and ethylbenzene; An electromagnetic wave shielding powder and a solvent.

In a preferred embodiment of the present invention, the matte metallic paint of the present invention comprises 1 to 7 parts by weight of the pigment, 5 to 10 parts by weight of an aluminum flake; 10 to 20 parts by weight of a filler; 0.5 to 3 parts by weight of a pigment dispersion stabilizer; 15-25 parts by weight of organic diluent; 1 to 5 parts by weight of an adhesion improver; 8 to 15 parts by weight of electromagnetic wave shielding powder; And 60 to 100 parts by weight of a solvent.

In one preferred embodiment of the present invention, the binder resin in the matte metallic coating composition of the present invention is a (C3 to C6 alkyl) acetate resin, a 2-alcoholic-1-methylethyl acetate resin, and an alkylene glycol monoalkyl And an ether acetate resin.

In one preferred embodiment of the present invention, the binder resin is a copolymer of a (C3 to C6 alkyl) acetate resin, a 2-alcoholic-1-methylethyl acetate resin and an alkylene glycol monoalkyl ether acetate resin at a ratio of 1: 1.5: 2 to 3.5 weight ratio.

In one preferred embodiment of the present invention, the inorganic pigment in the matte metallic coating composition of the present invention is a black inorganic pigment, a green crab inorganic pigment, a blue based inorganic pigment, a dark purple based inorganic pigment, And the like.

In one preferred embodiment of the present invention, the filler of the matte metallic coating composition of the present invention may include at least one selected from silicate aluminate and magnesium aluminate.

In one preferred embodiment of the present invention, the pigment dispersion stabilizer in the matte metallic coating composition of the present invention is at least one selected from the group consisting of alcohol polyoxyalkylene sulfate ester salts, compounds represented by the following general formula (1) and hydrodesulfurized kerosene . ≪ / RTI >

[Chemical Formula 1]

Wherein R ¹ is a halogen atom, an anthraquinonylamino group, a phenylamino group, a naphthylamino group or a phenoxy group, R ² is an alkylene group, a phenylene group or a naphthalene group, R ³ is a hydrogen atom, a halogen atom, a C1 Or an alkyl or acylamino group of C3.

In one preferred embodiment of the present invention, the organic diluent in the matte metallic coating composition of the present invention may contain xylene, toluene, and ethylbenzene in a weight ratio of 1: 1 to 2: 0.1 to 0.5.

As one preferred embodiment of the present invention, the adhesion-improving agent in the matte metallic coating composition of the present invention is selected from the group consisting of an ethylene-? -Olefin random interpolymer, an ethylene? -Olefin random block polymer and a propylene-? Or more.

In one preferred embodiment of the present invention, the electromagnetic wave shielding powder of the matte metallic coating composition of the present invention may comprise at least one selected from the group consisting of Sendust flake, amorphous Fe-based powder, permalloy powder and amorphous Cr-based alloy powder.

In one preferred embodiment of the present invention, the solvent in the matte metallic coating composition of the present invention may include at least one selected from aromatic hard naphtha, methanol, ethanol and propanol.

As a preferred embodiment of the present invention, the matte metallic paint of the present invention may have a specific gravity of 1.10 to 1.30.

It is another object of the present invention to provide a method for coating a coating material using various types of matte metallic coating materials as described above, wherein the coating material is painted with the matte metallic paint without primer treatment or primer treated with the coating material to form a primer layer And then the top of the primer layer can be painted with the above-described matte metallic paint.

According to a preferred embodiment of the present invention, there is provided a method of polishing a surface of a coating material, A second step of washing and drying the polished coating material; A third step of subjecting the dried coating material to a first coating treatment with the above-described matte metallic paint; A fourth step of subjecting the coating material subjected to the first coating process to the second coating process with the matte metallic coating material; A fifth step of subjecting the second coating material to a heat treatment at a temperature of 150 ° C to 170 ° C; And a cooling step; and performing a coating process using a matte metallic coating.

In one preferred embodiment of the present invention, the coating material in the first step may be composed of a plastic material or a metal material.

As a preferred embodiment of the present invention, the second stage may further perform a masking process after the drying process.

As a preferred embodiment of the present invention, the primer pretreatment process may be performed on the surface of the coating material dried before the first coating process of the three stages.

In one preferred embodiment of the present invention, the three-step primary coating process can be performed such that the average thickness of the primary coating layer formed of the matte metallic coating is 6 to 8 占 퐉.

As a preferred embodiment of the present invention, the secondary coating process of four stages can be carried out such that the average thickness of the primary coating layer formed of a matte metallic paint is 10 mu m to 20 mu m.

As a preferred embodiment of the present invention, the fourth step may further include a step of coating with a coating protective coating after the second coating.

Since the coating material of the present invention is excellent in adhesion to plastics and / or metal surfaces, unlike conventional metallic coating materials, it is not necessary to apply primer coating before painting, or primer coating can be selectively performed, It is possible to provide a coating material which is excellent in economic efficiency and can give a high esthetic feeling while utilizing a metal surface texture. In addition, since it has an electromagnetic wave shielding function, it is suitable for use as a coating material for a surface of an apparatus that generates electromagnetic waves, particularly, medical equipment and / or electronic equipment.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a photograph of the surface of a medical device prepared in Production Example 1 using the coating material of the present invention prepared in Example 1, wherein A is a front surface and B is a rear surface.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to specific descriptions of a coating method using a matte metallic paint of the present invention.

The coating using the coating material of the present invention can be applied to a coating material of a plastic material such as ABS (acrylonitrile-butadiene-styrene) or PC (polycarbonate) and / or a metal material such as an iron-based alloy, an aluminum-based alloy, a stainless alloy or a magnesium- Primer pretreatment is not necessary on the surface, and primer pretreatment can be selectively performed.

More specifically, the present invention relates to a method for polishing a surface of a coating material, A second step of washing and drying the polished coating material; A third step of subjecting the dried coating material to a first coating treatment with the above-described matte metallic paint; A fourth step of subjecting the coating material subjected to the first coating process to the second coating process with the matte metallic coating material; A fifth step of subjecting the second coating material to a heat treatment at a temperature of 150 ° C to 170 ° C; And a cooling step; and performing a coating process using a matte metallic coating.

As described above, the coating material in the first step may be a plastic material and / or a metal material. Specific examples of the coating material include ultrasonic devices, external appearance materials of medical devices such as X-ray, It can be the appearance of the electronic device.

The first step polishing can be performed by physical polishing and / or chemical polishing using a general method used in the art, and the method is not particularly limited. Through such polishing, the adhesive force (or adhesion force) between the paint and the coating material can be increased.

In the second step, after the drying, a masking process can be further performed. This is a process for masking a portion not requiring a coating process with a masking tape or the like.

In addition, washing and drying in two steps can also be performed by washing and drying through a general method used in the art, and the present invention is not particularly limited thereto.

Next, the three-step matte metallic paint will be described in detail later. The primary coating treatment is preferably carried out by an air spray coating method at a temperature of 20 ° C to 30 ° C, preferably 22 ° C to 26 ° C and an atmosphere of a relative humidity of 45 to 65%. It is preferable that the coating treatment is performed such that the average thickness of the primary coating layer subjected to the primary coating treatment is about 6 탆 to 8 탆.

It is also possible to perform a pretreatment for forming a primer layer with a primer on the surface of the coating material to be dried (and masked) before the primary coating process in the three stages, which is an optional process and not an essential process. At this time, the primer agent may be a general primer agent used in the art.

Next, the four-step matte metallic paint is the same as that of the three-step paint, and the secondary paint treatment is carried out at a temperature of 20 ° C to 30 ° C, preferably 22 ° C to 26 ° C, It is recommended to carry out the air spray coating method in an atmosphere of 45% to 65%. It is also preferable that the coating treatment is carried out such that the average thickness of the secondary coating layer subjected to the secondary coating treatment is about 10 탆 to 20 탆, preferably about 10 to 16 탆.

Next, step 5 is a step of heat-treating the coating material subjected to the second coating treatment, and it can be carried out at 150 to 170 DEG C, preferably at 155 to 165 DEG C for 20 to 50 minutes, preferably 30 to 40 minutes . If the heat treatment temperature is less than 150 ° C, there may be a problem that the bonding force between the coating material and the material to be coated deteriorates, and it is uneconomical that the heat treatment temperature exceeds 170 ° C.

Step 6 is a step of cooling the heat-treated coating material at room temperature and can be carried out by a general method used in the related art.

The matte metallic paint of the present invention used in the above-described coating method will be described.

The matte metallic paint of the present invention comprises a binder resin; A pigment comprising at least one selected from inorganic pigments and organic pigments; Aluminum flakes; filler; Pigment dispersion stabilizers; Organic diluents including xylene, toluene and ethylbenzene; An electromagnetic wave shielding powder and a solvent.

In addition, the matte metallic coating material of the present invention may further comprise, in addition to the above composition, an additive including at least one selected from a curing agent, a viscosity control agent such as a thinner, and a curing agent.

Among the coating components of the present invention, the binder resin includes at least one selected from a (C3-C6 alkyl) acetate resin, a 2-alcoholic-1-methyl ethyl acetate resin and an alkylene glycol monoalkyl ether acetate resin Preferably two or more selected from (C3-C6 alkyl) acetate resins, 2-alcoholic-1-methylethyl acetate resin and alkylene glycol monoalkyl ether acetate resins, more preferably 3 Species can be mixed and used. When the three kinds are mixed and used, the amount of the (C3 to C6 alkyl) acetate resin, the 2-alcoholic-1-methyl ethyl acetate resin and the alkylene glycol monoalkyl ether acetate resin is preferably 1: 0.5 to 1.5: 3.5 to 1: 0.8 to 1.2: 2.5 to 3.0 by weight, in terms of matting property, adhesion to the coating material, miscibility with other compositions, and coating workability.

Next, at least one selected from the general inorganic pigments and organic pigments used in the art can be used as the above-mentioned pigment in the paint component, and preferably at least one selected from a black-based inorganic pigment, a green crab inorganic pigment, a blue- (dark purple) -based inorganic pigments, and a magenta-colored inorganic pigment. As the black-based inorganic pigment, at least one selected from carbon black, iron black, and black pigment (trade name: P79-K16-31910) manufactured by Musashi Paint Co., Ltd. may be used. As the red inorganic pigment, at least one selected from Bengala, Vermilion, and Cadmium Red is preferably used. As the yellow inorganic pigment, at least one selected from chromium yellow, cadmium yellow and yellow ocher can be used. As the green inorganic pigment, at least one selected from emerald green and chromium oxide green is preferably used. As the blue inorganic pigment, at least one selected from Prussian blue and cobalt blue is preferably used. The dark purple inorganic pigment may be commercially available, but it is preferable to use a dark purple pigment (trade name: P79-K16-31911) manufactured by Musashi Paint Co., Ltd. of Korea.

The amount of the pigment in the paint and the amount of the pigment to be used may be appropriately used according to the color of paint to be expressed, preferably 1 to 7 parts by weight, preferably 1.5 to 7 parts by weight, more preferably 2 to 6.5 parts by weight.

Next, among the paint components, the aluminum flake serves to impart the metallic property of the paint. Preferably, the aluminum flake has a corn-shaped aluminum flake with an average particle diameter of 0.5 to 10 mu m and / It is advantageous to use aluminum flakes having a mean particle size of 1 탆 to 12 탆 and in the form of ROUND as metallic flakes and three-dimensional flakes. At this time, when the average particle diameter of the cone-shaped aluminum flakes is 0.5 mu m, the purchase is difficult and the management is not easy. When the average particle diameter exceeds 12 mu m, the painted coating film becomes too rough and the aesthetics may be deteriorated. If the average particle diameter of the dollar-shaped aluminum flakes exceeds 12 탆, the irregularity may be increased and the matte properties may be disadvantageous.

The use amount of the aluminum flake is 5 to 10 parts by weight, preferably 5.2 to 8.5 parts by weight based on 100 parts by weight of the binder resin, which is advantageous in terms of metallic appearance and matte.

Next, the filler in the paint component is used for improving the scratch resistance of the paint film, and may be a mixture of two or more species selected from among silicate aluminate and magnesium aluminate. The filler may be used in an amount of 10 to 20 parts by weight, preferably 14 to 18 parts by weight, based on 100 parts by weight of the binder resin. If the filler amount is less than 10 parts by weight, Scratches can easily occur due to an external impact. If the coating film is used in an amount exceeding 20 parts by weight, adverse effects on the aesthetics of the coating film may be adversely affected.

Next, the pigment dispersion-stabilizer in the paint component serves to improve the dispersibility of the pigment in the paint and to maintain the dispersion state of the pigment after being dispersed in the pigment, and includes alcohol polyoxyalkylene sulfate ester salt, And hydrodesulphurized kerosene may be used. Preferably, the compound represented by the following formula (1) and hydrodesulphurized kerosene may be mixed at a weight ratio of 1: 2 to 4: 1. Specific examples of the alcohol polyoxyethylene sulfuric acid ester salt include methanol polyoxyethylene sulfuric acid ester salt, ethanol polyoxyethylene sulfuric acid ester salt, and ethanol polyoxypropylene sulfuric acid ester salt.

[Chemical Formula 1]

In the above formula (1), R ¹ is a halogen atom, an anthraquinonylamino group, a phenylamino group, a naphthylamino group or a phenoxy group, preferably a halogen atom or a phenylamino group. R ² in the formula (1) is an alkylene group, a phenylene group or a naphthalene group, and preferably R ² is an alkylene group having 1 to 3 carbon atoms. R ³ in the general formula (1) is a hydrogen atom, a halogen atom, an alkyl group or an acylamino group having 1 to ³ carbon atoms, preferably a hydrogen atom or an acylamino group.

The pigment dispersion stabilizer may be used in an amount of 0.5 to 3 parts by weight, preferably 0.8 to 2.5 parts by weight, based on 100 parts by weight of the binder resin. When the amount of the pigment dispersion stabilizer is less than 0.5 parts by weight The use amount thereof is too small and the pigment dispersibility in the coating composition may not be good. If it is used in excess of 3 parts by weight, it may be over-used. Rather, it may cause problems that compatibility between the compositions in the coating composition is lowered. It is good to do.

The organic diluent may be a mixture of xylene, toluene and ethylbenzene, or a mixture of two or more selected from the group consisting of xylene, toluene and ethylbenzene, preferably 1: 1 to 2: 0.1 to 1: 0.5 weight ratio, or more preferably mixed with xylene, toluene and ethylbenzene at a weight ratio of 1: 1.2-1.6: 0.2-0.4 in terms of compatibility and compatibility of the compositions in the coating. The amount of the organic diluent used is preferably 15 to 25 parts by weight, preferably 17 to 23 parts by weight, based on 100 parts by weight of the binder resin.

Next, the adhesion improver among the coating components is used for improving the adhesion between the coating material and the coating material and improving the adhesion between the binder resin and other composition such as pigment, and it is preferable to use an ethylene-a-olefin random interpolymer, Random block polymer, and propylene-? -Olefin random interpolymer. Preferably, the ethylene /? - olefin random random copolymer and the ethylene /? - olefin random block polymer are used. Can be mixed and used. The amount of the adhesion promoting agent to be used is preferably 1 to 5 parts by weight, preferably 3 to 5 parts by weight, based on 100 parts by weight of the binder resin. If the amount is less than 1 part by weight, If it is used in an amount exceeding 5 parts by weight, the viscosity of the coating may be increased to decrease the fluidity of the coating, which may deteriorate the coating workability.

Next, the electromagnetic shielding powder among the paint components plays a role of imparting electromagnetic shielding function to the paint of the present invention. The electromagnetic shielding powder has a function of imparting electromagnetic wave shielding function to the paints of the present invention. The electromagnetic shielding powder may be selected from the group consisting of Sendutust flakes, amorphous Fe-based powders, permalloy powders and amorphous Cr- Or more can be mixed and used. The sandstorm flakes are pulverized products of Sendust alloy containing 65 to 72% by weight of Fe, 8 to 20% by weight of Si, 16 to 20% by weight of Al and other unavoidable impurities. The amorphous Cr-based alloy powder may contain 80 to 95 wt% of Fe, 2 to 15 wt% of Si, 1.5 to 10 wt% of Cr, and other unavoidable impurities.

The electromagnetic shielding powder has an average particle diameter of 0.1 to 5 占 퐉, preferably 0.5 to 3 占 퐉, which does not adversely affect the metallic feel and aesthetics of the painted coat layer.

The amount of the electromagnetic wave shielding powder to be used is preferably 5 to 20 parts by weight, preferably 8 to 15 parts by weight, based on 100 parts by weight of the binder resin.

Next, as the above-mentioned solvent, one or more selected from among aromatic hard naphtha, methanol, ethanol and propanol may be used, and preferably at least one selected from the group consisting of aromatic hard naphtha and ethanol, Aromatic naphtha and ethanol may be used in a weight ratio of 1: 3 to 5: 1. The amount of the solvent to be used is preferably from 60 to 100 parts by weight, more preferably from 75 to 95 parts by weight, and still more preferably from 75 to 90 parts by weight, based on 100 parts by weight of the binder resin. Good on the side.

The matte metallic paint of the present invention prepared by mixing these compositions may have a specific gravity of 1.10 to 1.30, preferably 1.15 to 1.25.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

[ Example ]

Example  One : Matte Metallic  Manufacture of paints

Butyl acetate resin, 2-ethoxy-1-methyl ethyl acetate resin and ethylene glycol methyl ether acetate resin were mixed at a weight ratio of 1: 0.8: 3 to prepare a binder resin.

Carbon black, a dark purple inorganic pigment (trade name: P79-K16-31911, manufactured by Musashi Paint Co., Ltd.) and a black inorganic pigment (trade name: P79-K16-31910, manufactured by Musashi Paint Co., Ltd.) were prepared as pigments.

A corn-shaped aluminum flake having an average particle diameter of 0.5 탆 to 2 탆 was prepared, and silicate aluminate was prepared as a filler.

Hydrodesulfurized kerosene was prepared as a pigment dispersion stabilizer. Then, xylene, toluene and ethylbenzene were mixed as an organic diluent in a weight ratio of 1: 1.6: 0.3.

The ethylene-? -Olefin random interpolymer and the ethylene-? -Olefin random block polymer were mixed at a weight ratio of 1: 0.5 to prepare an adhesion improver.

An amorphous Cr-based alloy powder having a particle diameter of 0.5 to 1 탆 and a sandstrue flake having a particle diameter of 1 to 1.2 탆 were prepared as an electromagnetic wave shielding powder, wherein the sandström flakes contained 68.5 wt% of Fe, 13.7 wt% of Si, 17.7 wt% And other unavoidable impurities. The amorphous Cr-based alloy powder contains 91.3% by weight of Fe, 3.8% by weight of Si and 4.7% by weight of Cr and other unavoidable impurities.

As the solvent, aromatic hard naphtha and ethanol were prepared by mixing at a weight ratio of 1: 4.

Next, 100 parts by weight of the binder resin was mixed and stirred in 83 parts by weight of the solvent to dissolve. Then, 2.5 parts by weight of the pigment dispersion stabilizer and 3.7 parts by weight of the adhesion improver were added, followed by mixing and stirring. Next, 20 parts by weight of the organic diluent, 1.54 parts by weight of the carbon black, 2.23 parts by weight of the dark purple inorganic pigment, 0.62 part by weight of the black inorganic pigment, 5.5 parts by weight of the aluminum flake, 13 parts by weight of the filler, And 11.8 parts by weight of shielding powder were mixed and stirred to prepare a matte metallic paint having a specific gravity of 1.18.

Example  2 : Matte Metallic  Manufacture of paints

A matte metallic paint was prepared in the same manner as in Example 1, except that a compound represented by the following formula (1-1) and hydrodesulfurized kerosene (1: 3) were mixed as a pigment dispersion stabilizer.

[Chemical Formula 1]

In Formula 1, R ¹ is a phenylamino group, R ² is an ethylene group, and R ³ is a hydrogen atom.

Example  3 ~ Example 6 and Comparative Example  1 ~ Comparative Example  10: Matte Metallic  Manufacture of paints

A matte metallic paint was prepared in the same manner as in Example 1, except that the paints having composition ratios as shown in Tables 1 and 2 were prepared, respectively, and Examples 3 to 6 and Comparative Examples 1 to 6 were conducted.

Comparative Example  11: Matte Metallic  Manufacture of paints

A matte metallic paint was prepared in the same manner as in Example 1, except that amorphous Cr-based alloy powder having a particle size of 12 to 15 탆 and sandstrue flake having a particle size of 12 to 15 탆 were used as electromagnetic wave shielding powder, A paint was prepared. At this time, the components of the sander strap and the amorphous Cr-based alloy powder are the same as those of the first embodiment.

Classification (parts by weight) Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 bookbinder
Suzy
(Weight ratio) (One) One One One One One One (2) 0.8 0.8 One 0.8 One - (3) 3 3 2.7 3 - 1.5 Binder resin weight part 100 100 100 100 100 100 Pigment Carbon black 1.54 1.54 1.05 0.55 1.54 1.54 Dark Purple 2.23 2.23 3.50 3.2 2.23 2.23 Black inorganic pigment 0.62 0.62 0.45 0.35 0.62 0.62 Aluminum flake Cone shape 5.5 5.5 4.8 4.5 5.5 5.5 Different shape - - 0.5 2.5 - - filler Silicate aluminate 12 12 12 15 3.7 3.7 Pigment Dispersion -
stabilizator (1-1) Compound - 0.75 0.50 0.75 0.75 0.75 Hydrodesulfurized kerosene 2.5 2.25 1.75 2.0 2.0 2.25 Organic diluent (4) 20 20 22 18 19.5 20 Adhesion improver (5) 3.7 3.7 3.5 4.2 3.5 3.7 Electromagnetic wave shielding powder (6) 7.8 7.8 7.8 6.0 7.0 7.8 (7) 4 4 4 5.5 4.5 4 solvent (8) 83 84 80 88 83 84 (1) Butyl acetate resin
(2) 2-Ethoxy-1-methyl ethyl acetate resin
(3) Ethylene glycol methyl ether acetate resin
(4) xylene: toluene: ethylbenzene = 1: 1.6: 0.3 weight ratio
(5) Ethylene -? - olefin random interpolymer: ethylene -? - olefin random block polymer = 1: 0.5 weight ratio
(6) Amorphous Cr-based alloy powder having a particle diameter of 0.5 to 1 탆
(7) Electromagnetic wave shielding powder having a particle diameter of 1 to 1.2 mu m
(8) aromatic hard naphtha: ethanol = 1: 4 weight ratio

Classification (parts by weight) Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 bookbinder
Suzy
(Weight ratio) (One) One - One One One One (2) - One 0.8 0.8 0.8 0.8 (3) - - 3 3 3 3 Binder resin weight part 100 100 100 100 100 100 Pigment Carbon black 1.54 1.54 1.54 1.54 1.54 1.54 Dark Purple 2.23 2.23 2.23 2.23 2.23 2.23 Black inorganic pigment 0.62 0.62 0.62 0.62 0.62 0.62 Aluminum flake Cone shape 5.5 5.5 4 5.5 5.5 5.5 Different shape - - - - - - filler Silicate aluminate 12 12 12 8 25 12 Pigment Dispersion -
stabilizator (1-1) Compound - - - - - - Hydrodesulfurized kerosene 2.5 2.5 2.5 2.5 2.5 0.3 Organic diluent (4) 20 20 20 20 20 20 Adhesion improver (5) 3.7 3.7 3.7 3.7 3.7 3.7 Electromagnetic wave shielding powder (6) 7.8 7.8 7.8 7.8 7.8 7.8 (7) 4 4 4 4 4 4 solvent (8) 83 83 83 83 83 83 (1) Butyl acetate resin
(2) 2-Ethoxy-1-methyl ethyl acetate resin
(3) Ethylene glycol methyl ether acetate resin
(4) xylene: toluene: ethylbenzene = 1: 1.6: 0.3 weight ratio
(5) Ethylene -? - olefin random interpolymer: ethylene -? - olefin random block polymer = 1: 0.5 weight ratio
(6) Amorphous Cr-based alloy powder having a particle diameter of 0.5 to 1 탆
(7) Electromagnetic wave shielding powder having a particle diameter of 1 to 1.2 mu m
(8) aromatic hard naphtha: ethanol = 1: 4 weight ratio

Classification (parts by weight) Comparative Example 7 Comparative Example 8 Comparative Example 9 Comparative Example 10 Comparative Example 11 bookbinder
Suzy
(Weight ratio) (One) One One One One One (2) 0.8 0.8 0.8 0.8 0.8 (3) 3 3 3 3 3 Binder resin weight part 100 100 100 100 100 Pigment Carbon black 1.54 1.54 1.54 1.54 1.54 Dark Purple 2.23 2.23 2.23 2.23 2.23 Black inorganic pigment 0.62 0.62 0.62 0.62 0.62 Aluminum flake Cone shape 5.5 5.5 5.5 5.5 5.5 Different shape - - - - - filler Silicate aluminate 12 12 12 12 12 Pigment Dispersion -
stabilizator (1-1) Compound - - - - -
- Hydrodesulfurized kerosene 5 2.5 2.5 2.5 2.5 Organic diluent (4) 20 20 20 20 20 Adhesion improver (5) 3.7 2.0 7.5 3.7 3.7 Electromagnetic wave shielding powder (6) 7.8 7.8 7.8 2 7.8 (7) 4 4 4 2 4 solvent (8) 83 83 83 83 83 (1) Butyl acetate resin
(2) 2-Ethoxy-1-methyl ethyl acetate resin
(3) Ethylene glycol methyl ether acetate resin
(4) xylene: toluene: ethylbenzene = 1: 1.6: 0.3 weight ratio
(5) Ethylene -? - olefin random interpolymer: ethylene -? - olefin random block polymer = 1: 0.5 weight ratio
(6) Amorphous Cr-based alloy powder having a particle diameter of 0.5 to 1 탆
(7) Electromagnetic wave shielding powder having a particle diameter of 1 to 1.2 mu m
(8) aromatic hard naphtha: ethanol = 1: 4 weight ratio

Manufacturing example  One

The surface of the Al-based alloy external appearance material (Sechang Industrial Co., Ltd.) for ultrasonic devices was polished and cleaned, and then dried by applying hot air.

Next, the dry exterior material (painted material) was masked with a masking tape.

Next, a thinner and butyl melamine curing agent (manufacturer: Aekyung Co., Ltd., trade name: AM-250-60) was added to the matte metallic paint of Example 1 to have an appropriate fluidity, and then put into an air spray tank.

Then, the surface of the outer mask material masked at 25 ° C and a relative humidity of 52 to 53% was first coated. At this time, the nozzle diameter of the air spray gun was 1.2 ø and the air pressure was 3.7 ~ 3.8 Kg / cm ² . The primary coating thickness was 6.4 to 6.5 mu m.

Next, the outer coating material subjected to the first coating treatment was subjected to the second coating treatment in the same manner as the first coating under the conditions of 25 ° C and a relative humidity of 52 to 53%. At this time, the secondary paint thickness was 12.4 to 12.5 占 퐉.

Next, the outer tubular material subjected to the second coating treatment was subjected to heat treatment at 160 캜 for 34 minutes to 35 minutes.

Next, the heat-treated outer tubular material was cooled at room temperature to produce an outer tubular material for an ultrasonic device coated with the coating material of the present invention. The front and rear photographs of the manufactured outer appearance material are shown in FIGS. 1A and 1B, respectively.

Manufacturing example  2 to 6 and Comparative Manufacturing Example  1 to 11

Using the paints of Examples 2 to 6 and Comparative Examples 1 to 11 under the same conditions and conditions as those of Production Example 1 Production Examples 2 to 6 and Comparative Production Examples 1 to 11 were each subjected to painting treatment of an Al-based alloy appearance material for ultrasonic devices (Sechang Industrial Co., Ltd.).

Comparative Manufacturing Example  12

The coating was carried out under the same conditions and conditions as in Preparation Example 1, except that the heat treatment was carried out at 140 占 폚.

Experimental Example 1: Measurement of physical properties 1

The outer tubular materials coated in Examples 1 to 6 and Comparative Preparative Examples 1 to 11 were cut to an appropriate size, and then each of them was subjected to water-based and film-bonding, such as relative glossiness, scratch resistance, And the results are shown in Table 4 below.

The relative glossiness was measured by setting the angle to be measured on the gloss meter at 60 °, correcting the value with a standard plate, removing foreign matters from the test plate, and measuring the relative glossiness. Relative glossiness was defined as 100% of the measurement value of Preparation Example 1, and the relative glossiness was expressed as a standard relative glossiness.

The scratch resistance was measured by a pencil hardness measuring method (3B, 2B, B, HB, F, H, 2H to 7H hardness) according to ASTM D3363. The pencil was bound to a hardness tester at 45 ° angle, And the line was repeatedly drawn five times so that the length was 20 mm or more, and the test area was erased with an eraser and observed with the naked eye.

The temperature of the hot water bath was maintained at 95 ~ 100 ℃. After 1 hour, the specimens were taken out from the hot water bath and washed with water.

The adhesion (adhesion) of the film was evaluated by fixing the test plate to a flat place and then keeping the coin at a 30 to 45 ° angle on the test plate and scratching the film more than 20 mm to evaluate the adhesiveness (adhesion)

division Gloss (60 °) Scratch resistance Abdominal aquatic Coating property Production Example 1 100% 2H ◎ ◎ Production Example 2 98.7% 2H ◎ ◎ Production Example 3 102.3% 2H ◎ ◎ Production Example 4 106.5% 2H ◎ ◎ Production Example 5 99.5% H ◎ ○ Production Example 6 101.2% 2H ◎ ○ Comparative Preparation Example 1 100.5% H ◎ △ Comparative Production Example 2 99.7% F ○ ○ Comparative Production Example 3 95.4% H ◎ ◎ Comparative Production Example 4 103.3% F ◎ ◎ Comparative Preparation Example 5 102.5% 3H ◎ ◎ Comparative Preparation Example 6 108.7% H ◎ ◎ Comparative Preparation Example 7 99.1% H ◎ ○ Comparative Preparation Example 8 101.8% F ○ △ Comparative Preparation Example 9 100.6% 2H ◎ ◎ Comparative Preparation Example 10 104.2% 2H ◎ ◎ Comparative Production Example 11 99.3% 2H ◎ ◎ Comparative Preparation Example 12 100.7% HB ○ △ △ Normal, ○ Good, ◎ Excellent

Experimental Example  2: Measurement of physical properties 2

The outer tubular materials coated in Examples 1 to 6 and Comparative Production Examples 1 to 11 were cut to an appropriate size and then each of them was measured for corrosion resistance, weather resistance, moisture resistance and surface resistance (?) By the following methods , And the results are shown in Table 5 below.

The corrosion resistance was tested for 2,000 hours in a salt spray test standard conforming to ASTM D B1117, and the surface of the outer surface of the test sample was cut with a cutter to measure the degree of occurrence of white rust and blister of the test piece after 2,000 hours Respectively.

The weathering resistance of the specimen was measured after 2,000 hours by applying the weathering test standard according to ASTM G154, and the chalking phenomenon was observed.

The humidity resistance was measured by setting the conditions of the wet tester to 49 ± 1 ° C and relative humidity of 95% or more, holding the specimen on the specimen holder for 2,000 hours, and observing the occurrence of blisters.

The surface resistance was measured by setting a resistance value with a digital multimeter (4-probe) apparatus according to ASTM D257, and measuring the surface resistance by 10 points or more.

division Corrosion resistance Weatherability Moisture resistance Surface resistance value
(Ω) Production Example 1 ○ ◎ ◎ 10.2 to 10.5 Production Example 2 ◎ ◎ ◎ 9.7 to 9.9 Production Example 3 ◎ ◎ ◎ 10.6 ~ 10.8 Production Example 4 ◎ ◎ ◎ 9.9 to 10.2 Production Example 5 ○ ○ ◎ 10.0 to 10.3 Production Example 6 ○ ◎ ○ 10.0 to 10.3 Comparative Preparation Example 1 ○ ○ ○ 10.4 to 10.7 Comparative Production Example 2 △ ○ ○ 10.2 to 10.6 Comparative Production Example 3 ○ ◎ ◎ 10.5 to 10.8 Comparative Production Example 4 ◎ ◎ ◎ 9.5 to 9.7 Comparative Preparation Example 5 ◎ ◎ ◎ 9.6 ~ 9.8 Comparative Preparation Example 6 △ ○ △ 10.4 to 10.7 Comparative Preparation Example 7 ○ ○ △ 10.4 to 10.7 Comparative Preparation Example 8 ○ ◎ ◎ 10.0 to 10.4 Comparative Preparation Example 9 ○ ○ ○ 10.2 ~ Comparative Preparation Example 10 ◎ ◎ ◎ 22.5 to 22.7 Comparative Production Example 11 ◎ ◎ ◎ 8.9 to 9.3 Comparative Preparation Example 12 ○ ○ △ 10.3 to 10.6 △ Normal, ○ Good, ◎ Excellent

The results of measurement of Tables 4 and 5 show that Examples 1 to 6 painted using the paints prepared in Examples had excellent physical properties as a whole and had a low surface resistance value, It is considered to be excellent, and it has excellent quality because it makes good use of matte and metallic material expression.

However, Comparative Production Example 1 and Comparative Production Example 2 in which only one kind of binder resin was used had poor scratch resistance and / or film adhesion property as compared with the production examples, and also had relatively low corrosion resistance, weather resistance and moisture resistance Results.

Comparative Production Example 3 in which aluminum flakes were used in a smaller amount had higher maturity than Production Example 1, but there was a problem in that the aesthetics with respect to the metal material dropped and commerciality deteriorated.

In Comparative Production Example 4 using less filler, there was a problem that the scratch resistance was greatly lowered. In Comparative Production Example 5 using too much filler, the scratch resistance was excellent, but the quality such as paint surface texture, There was a falling problem.

Comparative Production Example 6 using less pigment dispersion-stabilizer showed poor results in corrosion resistance and moisture resistance. In Comparative Production Example 7 in which the pigment dispersion-stabilizer was excessively used, In comparison with the example, there was a problem that the physical properties were somewhat reduced.

Comparative Preparation Example 8 using less adhesion improving agent had a problem that scratch resistance and film adhesion were comparatively low as compared with the production example.

In Comparative Production Example 9, the fluidity of the coating material was not good due to excessive use of the adhesion improver. As a result, the coating workability was poor and the uniform coating film treatment could not be performed. As a result, the corrosion resistance and moisture resistance Somewhat bad results.

In Comparative Production Example 10, there was a problem that the surface resistance greatly increased and the electromagnetic wave shielding effect was greatly reduced.

In the case of Comparative Production Example 11, there was a problem that the surface resistance was low due to excessive use of the electromagnetic wave shielding powder, but the aesthetic property was deteriorated and the commerciality was deteriorated.

Comparative Production Example 12 in which heat treatment was performed at a temperature lower than 150 ° C had a low scratch resistance and film adhesion property and a poor moisture resistance as compared with the production example.

Through the above Examples and Experimental Examples, it was confirmed that the present invention is suitable for use as a coating material for high quality matte metallic material expression and has excellent physical properties. The present invention has an electromagnetic shielding function and is suitable for use as a paint for various plastic materials as well as for external use paint for medical equipment and / or electronic equipment.

Claims (13)

delete 1 to 7 parts by weight of a pigment relative to 100 parts by weight of a binder resin; 5 to 10 parts by weight of an aluminum flake; 10 to 20 parts by weight of a filler; 0.5 to 3 parts by weight of a pigment dispersion stabilizer; 15-25 parts by weight of organic diluent; 1 to 5 parts by weight of an adhesion improver; 5 to 20 parts by weight of an electromagnetic wave shielding powder and 60 to 100 parts by weight of a solvent,
The binder resin includes at least one selected from a (C3-C6 alkyl) acetate resin, a 2-alcoholic-1-methylethyl acetate resin and an alkylene glycol monoalkyl ether acetate resin,
Wherein the filler comprises at least one selected from among silicate aluminate and magnesium aluminate,
Wherein the solvent comprises at least one selected from aromatic hard naphtha, methanol, ethanol and propanol.
delete 3. The composition of claim 2, wherein the binder resin is selected from the group consisting of (C3-C6 alkyl) acetate resin, 2-alcoholic-1-methylethyl acetate resin and alkylene glycol monoalkyl ether acetate resin in a ratio of 1: 0.5 to 1.5: 2 To 3.5 wt% based on the total weight of the coating composition.
delete The matting metallic coating material according to claim 2, wherein the pigment dispersion stabilizer comprises at least one selected from the group consisting of an alcohol polyoxyalkylene sulfate ester salt, a compound represented by the following formula (1), and hydrodesulphurized kerosene;
[Chemical Formula 1]

Wherein R ¹ is a halogen atom, an anthraquinonylamino group, a phenylamino group, a naphthylamino group or a phenoxy group, R ² is an alkylene group, a phenylene group or a naphthalene group, R ³ is a hydrogen atom, a halogen atom, a C1 Or an alkyl or acylamino group of C3.
3. The matting metallic coating according to claim 2, wherein the organic diluent comprises xylene, toluene and ethylbenzene in a weight ratio of 1: 1 to 2: 0.1 to 0.5.
The adhesive according to claim 2, wherein the adhesion improver comprises at least one selected from the group consisting of an ethylene- alpha -olefin random interpolymer, an ethylene- alpha -olefin random block polymer and a propylene- alpha -olefin random interpolymer. Metallic paint.
delete A first step of polishing the surface of the coating material of a plastic material or a metal material;
A second step of washing and drying the polished coating material;
The dried blood dojangjae claim 2, claim 4 and claim 6 to the third step of treating the first coating to any one of the matte metallic coating selected from the group consisting of 8;
A fourth step of subjecting the coating material subjected to the first coating process to the second coating process with the matte metallic coating material;
A fifth step of subjecting the second coating material to a heat treatment at a temperature of 150 ° C to 170 ° C; And
Cooling step 6;
The coating method using the matte metallic paint.
The coating method according to claim 10, wherein the second step further comprises a masking step after the drying.
The coating method using a matte metallic paint according to claim 10, wherein a primer pretreatment step is performed on the surface of the coating material dried before the first coating step of the third step.
The coating method according to claim 10, wherein the fourth step further comprises a step of coating with a coating protective coating after the second coating.

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