KR20200013356A - A coating agent for interior materials for automobile, method for forming coating layer of interior materials for automobile using the same, and interior materials thereof - Google Patents

Abstract

The present invention relates to a coating agent for an automobile interior material, to an automobile interior material coating layer forming method using same, and to an automobile interior material formed using the same. More specifically, the coating agent for an automobile interior material comprises: a lower layer forming agent including 100 parts by weight of a first acrylic polyol resin having the glass transition temperature (Tg) of 40 to 90°C, 5 to 40 parts by weight of a polyester polyol resin, 1 to 100 parts by weight of a coloring agent, and 1 to 30 parts by weight of aluminum (Al) paste; and an upper layer forming agent including 100 parts by weight of a second acrylic polyol resin having the glass transition temperature (Tg) of 60 to 90°C, and 5 to 25 parts by weight of beads.

Description

Coating material for automotive interior, method for forming automotive interior coating layer using the same, and automotive interior formed using the same

The present invention relates to a coating agent for automotive interior materials, a method for forming a vehicle interior coating layer using the same and an automobile interior materials manufactured using the same. More specifically, the present invention relates to a coating material for automotive interior materials that can simultaneously implement a metallic appearance and a rusted surface texture, and an automotive interior material formed using the same.

With the recent advance in automobiles, the physical properties and properties required for automotive interior paints have increased. Meanwhile, the interior materials for automobile multimedia such as audio have been treated on the surface by IPE (Ion Plasma Evaporation), chromium (Cr) plating layer formation, and metallic coating layer formation.

The IPE is a method of depositing on the surface of the interior material using aluminum (Al) pigment in a vacuum state, it can be applied to the substrate of a variety of materials, it may be possible to control the color (Color) by the clear (Clear). The IPE method may be achieved by sequentially forming a primer layer, an intermediate layer (Al deposition) layer, and a transparent layer on a substrate.

 The chromium (Cr) plating layer is a method of forming a coating layer containing a metal such as chromium on the surface using an electrolyte between the cathode and the anode, the chromium plating layer forming method is a nickel layer, a copper layer, a nickel layer on a substrate And it may be made by sequentially forming a chromium layer.

The metallic coating layer may apply a coating agent for spray coating, and may use a light reflection and scattering effect by an aluminum (Al) pigment to impart a metallic texture to the interior surface.

However, in the case of the IPE and chromium plating layer forming process, there was a problem that the yield yield and process cost is high compared to the general spray coating method, and in the case of metallic paint, the appearance performance is significantly reduced compared to the process of forming the IPE and chromium plating layer using the actual metal. Currently, the mass-produced paint for forming a metallic coating is a situation that only the implementation of a visual metal feeling.

Background art related to the present invention is disclosed in Republic of Korea Patent Publication No. 2016-0139206 (2016.12.07. Publication, the name of the invention: coating agent for matte dry plating coating and coating method using the same).

One object of the present invention is to provide a coating for automotive interior having excellent surface texture and aesthetics.

Still another object of the present invention is to provide a coating material for automotive interior having excellent adhesion to the substrate, reliability and mechanical properties.

Still another object of the present invention is to provide a coating material for automobile interior having low defect rate and excellent productivity and economy.

Still another object of the present invention is to provide a method for forming a vehicle interior coating layer using the vehicle interior coating.

Still another object of the present invention is to provide an automotive interior material formed using a coating material for automotive interior materials.

One aspect of the invention relates to a coating for automotive interiors. In one embodiment, the coating agent for the automotive interior material has a glass transition temperature (Tg): 40 parts by weight of 100 parts by weight of the first acrylic polyol resin, 5 to 40 parts by weight of polyester polyol resin, 1 to 100 parts by weight of colorant and aluminum ( Al) an undercoat layer forming agent including 1 to 30 parts by weight of the paste; And a glass transition temperature (Tg): a top coat layer forming agent including 100 parts by weight of the second acrylic polyol resin having a temperature of 60 to 90 ° C. and 5 to 25 parts by weight of the beads.

In one embodiment, the first acrylic polyol resin and the second acrylic polyol resin may each include two or more acrylic polyol resins having different glass transition temperatures (Tg).

In one embodiment, the first acrylic polyol resin may have a glass transition temperature (Tg) of 20-50 wt% of an acrylic polyol resin having a temperature of 40 ° C. to 50 ° C .; Glass transition temperature (Tg): 20 to 50% by weight of acrylic polyol resin having a temperature greater than 50 ° C. and 70 ° C. or less; And glass transition temperature (Tg): 10 to 35% by weight of acrylic polyol resin having a temperature of 70 ° C. or more and 90 ° C. or less, wherein the second acrylic polyol resin has a glass transition temperature (Tg): 60 ° C. to 70 ° C. 40 to 60 wt% resin; And glass transition temperature (Tg): 40 to 60% by weight of acrylic polyol resin that is greater than 70 ℃ 90 ℃ or less; may include.

In one embodiment, the polyester polyol resin may have a glass transition temperature (Tg): -20 ° C to 20 ° C.

In one embodiment, the undercoat layer forming agent may include the polyester polyol resin and the first acrylic polyol resin in a 1: 5 to 1:15 weight ratio.

In one embodiment, the beads may have an average particle diameter of 5 to 25 μm and specific gravity of 1.0 to 2.0.

In one embodiment, the top coat layer forming agent and the bottom coat layer may each further include a solvent.

In one embodiment, the aluminum paste includes a spherical or plate-shaped aluminum (Al) powder, the aluminum powder may have an average size of 5 ~ 20㎛.

In one embodiment, the colorant may include one or more of a dye and a pigment.

The beads may comprise one or more of silicone beads, urethane beads and acrylic beads.

Another aspect of the present invention relates to a method for forming a vehicle interior coating layer using a coating agent for automotive interior materials. In one embodiment, the method for forming the automotive interior coating layer may include a glass transition temperature (Tg): 100 parts by weight of the first acrylic polyol resin, 5 to 40 parts by weight of polyester polyol resin, and colorant 1 to at least a portion of the substrate. Coating and curing the undercoat layer forming agent including 100 parts by weight and 1-30 parts by weight of aluminum (Al) paste to form a undercoat layer; And a top coat layer former including 100 parts by weight of a second acrylic polyol resin having a glass transition temperature (Tg) of 60 to 90 ° C. and 5 to 25 parts by weight of beads, to form a top layer. It includes; step.

In one embodiment, the undercoat layer and the top coat layer may be formed by curing the coated undercoat layer and the topcoat layer, respectively, at 70 to 100 ° C.

Another aspect of the present invention relates to a vehicle interior including a coating layer formed by using the coating agent for automotive interior materials. In one embodiment the automotive interior material is a substrate; It is formed on at least a portion of the substrate, the glass transition temperature (Tg): 40 parts by weight of the first acrylic polyol resin of 40 to 90 ℃, 5 to 40 parts by weight of polyester polyol resin, 1 to 100 parts by weight of colorant and aluminum (Al An undercoat layer comprising 1 to 30 parts by weight; And a top coat layer formed on a surface of the bottom coat layer and having a glass transition temperature (Tg) of 60 to 90 ° C. in a second acrylic polyol resin matrix having 5 to 25 parts by weight of beads dispersed therein. One or more irregularities are formed.

In one embodiment, the height of the unevenness is 0.3 ~ 20㎛, the longitudinal section may be hemispherical or semi-elliptic.

In one embodiment, the thickness of the undercoat layer is 3 ~ 15㎛, the thickness of the top coat layer may be 20 ~ 35㎛.

When applying the coating agent for automobile interior according to the present invention, by implementing a rough surface texture and metallic appearance, excellent aesthetics, excellent adhesion, reliability and mechanical properties of the coating layer and the substrate, low defect rate In addition, productivity and economy can be excellent.

1 shows a vehicle interior according to an embodiment of the present invention.

In the following description of the present invention, when it is determined that detailed descriptions of related well-known technologies or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

The terms to be described below are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators, and the definitions should be made based on the contents throughout the specification for describing the present invention.

Coatings for Automotive Interior Materials

One aspect of the invention relates to a coating for automotive interiors. The coating material for the automotive interior material glass transition temperature (Tg): 40 parts by weight of the first acrylic polyol resin 100 ~ 5 parts, polyester polyol resin 5 ~ 40 parts by weight, colorant 1 ~ 100 parts by weight and aluminum (Al) paste 1 An undercoat forming agent comprising ˜30 parts by weight; And a glass transition temperature (Tg): a top coat layer forming agent including 100 parts by weight of the second acrylic polyol resin having a temperature of 60 to 90 ° C. and 5 to 25 parts by weight of the beads.

Subfloor Former

First acrylic polyol resin

The first acrylic polyol resin uses a glass transition temperature (Tg): 40 ~ 90 ℃. When the glass transition temperature is less than 40 ° C, the adhesion between the undercoat and the substrate or the top layer is lowered and the mechanical strength is lowered. When the glass transition temperature is higher than 90 ° C, the adhesion, heat resistance and impact resistance may be reduced.

In one embodiment, the hydroxyl value of the first acrylic polyol resin may be 9 ~ 200mgKOH / g. Under the above conditions, the mechanical strength of the undercoat layer may be excellent.

In one embodiment, the first acrylic polyol resin may include two or more acrylic polyol resins having different glass transition temperatures (Tg). For example, the first acrylic polyol resin may have a glass transition temperature (Tg) of 20 to 50% by weight of an acrylic polyol resin having a temperature of 40 ° C. to 50 ° C .; Glass transition temperature (Tg): 20 to 50% by weight of acrylic polyol resin having a temperature greater than 50 ° C. and 70 ° C. or less; And glass transition temperature (Tg): 10 to 35% by weight of an acrylic polyol resin having a temperature of 70 ° C. or more and 90 ° C. or less. When the acrylic polyol resin under the glass transition temperature is included in the weight range, the mixing and compatibility of the undercoat layer forming agent may be excellent, and the adhesion and the mechanical strength may be excellent.

Polyester polyol resin

The polyester polyol resin is included for the purpose of ensuring the impact resistance, chemical resistance and adhesion of the undercoat layer.

In one embodiment, the polyester polyol resin may have a glass transition temperature (Tg): -20 ° C to 20 ° C. Adhesion, strength and chemical resistance may be excellent in the glass transition temperature range.

In one embodiment, the hydroxyl value of the polyester polyol resin may be 50 ~ 250mgKOH / g. Under the above conditions, the mechanical strength of the undercoat layer may be excellent.

In one embodiment, the polyester polyol resin is included 5 to 40 parts by weight based on 100 parts by weight of the first acrylic polyol resin. When the polyester polyol resin is included in less than 5 parts by weight, the impact resistance and strength is lowered. When the polyester polyol resin is included in an amount greater than 40 parts by weight, the adhesion between the undercoating layer and the substrate or the top layer is reduced, and the strength may be reduced.

In one embodiment, the undercoat layer forming agent may include the polyester polyol resin and the first acrylic polyol resin in a 1: 5 to 1:15 weight ratio. When included in the weight ratio range, the adhesion, chemical resistance and mechanical strength of the undercoat layer may be excellent. For example, it may be included in a weight ratio of 1: 8 to 1:12.

Colorant

The colorant is included with the aluminum paste for the purpose of imparting color and metallic appearance to the undercoat of the present invention.

In one embodiment, the colorant may include one or more of a dye and a pigment. The pigment may include at least one of an organic pigment and an inorganic pigment. For example, as the colorant, pigments of black, red and orange colors, dispersed in one or more of cellulose acetate butyrate (CAB) resin and acrylic resin, can be used.

In one embodiment, the colorant is 1 to 100 parts by weight based on 100 parts by weight of the first acrylic polyol resin. When the colorant is included in less than 1 part by weight, it is difficult to implement color, and thus appearance may be degraded. When the colorant is included in an amount of more than 100 parts by weight, the mixing properties and mechanical strength of the sub-layer components may be reduced.

Aluminum (Al) Paste

The aluminum paste is included for the purpose of giving a metallic appearance to the undercoat of the present invention.

In one embodiment, the aluminum paste may include spherical or plate-shaped aluminum (Al) powder and a solvent. In embodiments, the aluminum powder may have an average size of 5 ~ 20㎛. The average size of the aluminum powder may mean a diameter or a maximum length.

In one embodiment, the aluminum paste is included in an amount of 1 to 30 parts by weight based on 100 parts by weight of the first acrylic polyol resin. When the aluminum paste is included in an amount of less than 1 part by weight, the appearance may be lowered. When the aluminum paste is included in an amount of more than 30 parts by weight, the mechanical strength of the undercoat layer may be reduced.

Top floor Former

2nd acrylic polyol resin

The second acrylic polyol resin includes a glass transition temperature (Tg): 60 ~ 90 ℃. When the glass transition temperature is less than 60 ℃, the adhesion between the top coat and the lower coating layer is lowered, the mechanical strength is lowered, if it exceeds 90 ℃ may be reduced in adhesion, heat resistance and impact resistance.

In an embodiment, the second acrylic polyol resin may include two or more acrylic polyol resins having different glass transition temperatures (Tg). For example, the second acrylic polyol resin may include a glass transition temperature (Tg) of 40 to 60% by weight of an acrylic polyol resin having a temperature of 60 ° C to 70 ° C; And glass transition temperature (Tg): 40 to 60% by weight of acrylic polyol resin that is greater than 70 ℃ 90 ℃ or less; may include. When the acrylic polyol resin under the glass transition temperature conditions is included in the weight range, the mixing and compatibility of the top coat layer forming agent may be excellent, and the adhesion and the mechanical strength may be excellent.

In one embodiment, the hydroxyl value of the second acrylic polyol resin may be 20 ~ 200mgKOH / g. Under the above conditions, the mechanical strength of the top coat layer may be excellent.

Bead

The bead is formed to form irregularities on the surface of the top coat layer, and expresses a rough texture, imparts a visual effect by reflection and scattering of incident light, and is included for the purpose of improving aesthetics.

In one embodiment the beads may comprise one or more of silicone beads, urethane beads and acrylic beads.

In one embodiment, the beads may have an average particle diameter of 5 ~ 25㎛. The irregularities are easily formed on the surface of the top coat layer under the particle size conditions, and have excellent mixing properties and dispersibility, excellent diffusion and reflection effects of light incident from the outside, and excellent appearance.

In one embodiment, the beads may have a specific gravity of 1.0 to 2.0. Under the above conditions, irregularities may be easily formed on the top coat layer surface.

In one embodiment, the bead is included 5 to 25 parts by weight based on 100 parts by weight of the second acrylic polyol resin. When the bead is included less than 5 parts by weight, the unevenness forming effect on the surface of the top coat layer is insignificant, and when it contains more than 25 parts by weight may lower the mechanical properties of the top coat layer.

solvent

In one embodiment, the top coat layer forming agent and the bottom coat layer may each further include a solvent. In one embodiment, the solvent may include at least one of a hydrocarbon solvent, a ketone solvent, and an acetate solvent. For example, it may include one or more of a hydrocarbon solvent and a ketone solvent.

In one embodiment, the hydrocarbon solvent may be a naphtha, an aromatic hydrocarbon solvent, or the like. The aromatic hydrocarbon solvent may include one or more of cyclo hexanon, xylene, and toluene. In one embodiment, the ketone solvent may include one or more of acetone, acetonitrile, methyl ethyl ketone, and methyl isobutyl ketone. In one embodiment, the acetate solvent may include at least one of ethyl acetate, n-butyl acetate, cellosolve acetate, propylene glycol monomethyl acetate, and ethylene glycol diacetate.

In one embodiment, the undercoat layer forming agent further includes 25 to 150 parts by weight of a solvent based on 100 parts by weight of the first acrylic polyol resin, and the top coat layer forming agent is based on 100 parts by weight of the second acrylic polyol resin. It may further comprise ~ 150 parts by weight. When included in the content may be excellent in mixing, dispersibility and workability.

Method of forming automotive interior coating layer using automotive interior coating

Another aspect of the present invention relates to a method for forming a vehicle interior coating layer using the coating agent for automobile interior materials.

In one embodiment, the method for forming an automotive interior coating layer using the automotive interior coating agent may include 100 parts by weight of a first acrylic polyol resin having a glass transition temperature (Tg) of 40 to 90 ° C. and a polyester polyol resin 5 to at least a portion of the substrate. Applying and curing an undercoat forming agent comprising 40 parts by weight, 1 to 100 parts by weight of a colorant and 1 to 30 parts by weight of aluminum (Al) paste to form a undercoat; And a top coat layer former including 100 parts by weight of a second acrylic polyol resin having a glass transition temperature (Tg) of 60 to 90 ° C. and 5 to 25 parts by weight of beads, to form a top layer. It includes; step.

Components of the undercoat layer forming agent and the topcoat layer forming agent may use the same components and contents as described above, and thus detailed description thereof will be omitted.

In one embodiment, the undercoat layer and the top coat layer may be formed by curing the coated undercoat layer and the topcoat layer, respectively, at 70 to 100 ° C. Upon curing under the above conditions, a top coat layer and a bottom coat layer may be easily formed.

For example, at least a part of the substrate is coated with an undercoat layer forming agent, and then cured at 70 to 100 ° C. for 5 to 15 minutes to form a undercoat layer, and a topcoat layer forming agent is applied to the undercoat layer surface. Next, it may be cured for 30 minutes to 5 hours at 70 ~ 100 ℃ to form a top coat layer.

Automobile interior materials manufactured using coating materials for automotive interior materials

Another aspect of the present invention relates to an automotive interior material manufactured using the coating agent for automotive interior materials.

1 shows a vehicle interior according to an embodiment of the present invention. Referring to FIG. 1, the automotive interior material 100 includes a substrate 10; It is formed on at least a part of the base material 10 and has a glass transition temperature (Tg) of 100 parts by weight of the first acrylic polyol resin, 40 to 90 ° C., 5 to 40 parts by weight of polyester polyol resin, 1 to 100 parts by weight of colorant, and aluminum. (Al) an undercoat layer 20 containing 1 to 30 parts by weight; And a top coat layer 30 formed on the surface of the undercoat layer 20 and having 5 to 25 parts by weight of beads dispersed in a second acrylic polyol resin matrix having a glass transition temperature (Tg) of 60 to 90 ° C. One or more irregularities 32 are formed on the surface of the layer 30.

In one embodiment, the substrate 10 may include one or more of a thermoplastic resin and a thermosetting resin.

Referring to FIG. 1, the height H of the unevenness 32 may be 0.3 to 20 μm. In addition, the height H of the unevenness may be a distance between the lowermost part and the uppermost part of the upper surface of the upper coating layer 30. In embodiments, the concave-convex 32 may be hemispherical or semi-elliptical in cross section. In one embodiment, the unevenness 32 may be formed by exposing the beads to the surface of the matrix. In another embodiment, the unevenness 32 may be formed in a form in which a second acrylic polyol resin is coated on the surface of the beads.

In one embodiment, the thickness of the undercoat layer 20 may be 3 to 15 μm, and the thickness of the top coat layer 30 may be 20 to 35 μm. When formed in the thickness range, it may be excellent in adhesion and reliability and mechanical properties of the coating layer and the substrate while excellent surface texture and appearance. Referring to FIG. 1, the thickness T ₂ of the top coat layer 30 may be a numerical value including irregularities formed on the surface of the top coat layer 30.

Automobile interior materials including a coating layer to which the coating agent for automotive interior materials according to the present invention is applied, by implementing a rough surface texture and a metallic appearance, high sensitivity of the product, adhesion of the coating layer and the substrate, reliability and mechanical properties It has excellent, low defect rate, can simplify the process and reduce post-processing cost compared to the existing IPE deposition and chrome plating process, it can be excellent in productivity and economic efficiency.

Hereinafter, the configuration and operation of the present invention through the preferred embodiment of the present invention will be described in more detail. However, it is presented as a preferred example of the present invention and should not be construed as limiting the present invention by any means.

Details that are not described herein will be omitted because those skilled in the art can sufficiently infer technically.

Example  And Comparative example

(One) Subfloor Former

(A) 1st acrylic polyol resin: glass transition temperature (Tg): 35 weight% of acrylic polyol resin which is 40 to 50 degreeC Glass transition temperature (Tg): 40 weight% of acrylic polyol resin and glass transition which are more than 50 degreeC and 70 degrees C or less. Temperature (Tg): The 1st acrylic polyol resin containing 25 weight% of acrylic polyol resins which are more than 70 degreeC and 90 degrees C or less was prepared.

(B) Polyester polyol resin: The glass transition temperature (Tg): The polyester polyol resin which is -20 degreeC-20 degreeC was used.

(C) Coloring agent: Pigments of black, red and orange color dispersed in cellulose acetate butyrate (CAB) resin and acrylic resin were used.

(D) Aluminum (Al) paste: An aluminum (Al) paste containing a spherical aluminum powder and a solvent having an average particle diameter of 5 to 7 µm was used.

(E) Solvent: Hydrocarbon, ester and ketone solvents were used.

(2) Top floor Former

(A) 2nd acrylic polyol resin: Glass transition temperature (Tg): It contains 50 weight% of acrylic polyol resin of 60 degreeC-70 degreeC, and Glass transition temperature (Tg): 50 weight% of acrylic polyol resin which is more than 70 degreeC and 90 degrees C or less. A second acrylic polyol resin was used.

(B) Bead: Spherical acrylic beads having an average particle diameter of 20 µm and specific gravity of 1 to 2 were used.

(C) Solvent: Hydrocarbon-based, ester-based and ketone-based solvents were used.

Example  1 ~ 2

By applying the components and contents shown in Table 1 below, a base coat layer forming agent and a top coat layer forming agent (cerasol (CERASOL), Hansol CNP Co., Ltd.) was prepared.

Comparative example  1-5

Except for applying the components and contents shown in Table 1, and was prepared in the same manner as in Example 1 the bottom coat layer forming agent and the top coat layer forming agent.

Preparation of automotive interiors : Examples 1 to 2 and Comparative Examples 1 to 5 were applied to prepare automotive interiors. The undercoat layer forming agent was applied to one surface of the polyolefin-based substrate, and then cured at 80 ° C. for 5 minutes to form a undercoat having a thickness of 5 to 10 μm, and a top coat forming agent was applied to the surface of the undercoat layer. Next, cured at 80 ° C. for 3 hours to form a top coat layer having a thickness (T ₂ ) of 25 μm. To form an automobile interior.

The automotive interior materials of Examples 1 to 2 and Comparative Examples 1 to 5 prepared above were evaluated for reliability in the following manner based on the MS655-08 standard.

(1) Adhesion: A cut line is cut to a depth reaching the surface of the substrate using a cutter on the undercoat and the upper coating layer formed on the specimens of the Examples and Comparative Examples, and 100 100mm square sheets of 2mm x 2mm are made, and the adhesive cellophane tape on the surface thereof. The number of remaining coating films of the squares after adhering at 90 ° C. and rapidly peeling them off was evaluated.

(2) Heat resistance: Example and Comparative Example After leaving the specimen at 110 ° C. for 500 hours, the appearance and adhesion of the top coat layer and the bottom coat layer were visually observed to determine good or bad.

(3) Heat-resistance cycle: Example and Comparative Example The specimen was left at 110 ° C. for 3 hours → -40 ° C. for 3 hours → 50 ° C. and relative humidity at 90% RH for 1 hour and 5 cycles were carried out. Next, the appearance and adhesion of the specimen top coat layer and the bottom coat layer were visually observed to determine good or bad.

(4) Moisture resistance: Example and Comparative Example specimens were left at 50 ° C. and 95% RH for 168 hours, and then the appearance and adhesion of the upper and lower layers of the specimen were visually observed to be good or poor. Determined.

(5) Light resistance: Example and Comparative Examples After the sample was irradiated with light of 1,050 kJ / m ² light amount, the appearance and adhesion of the top coat layer and the undercoat layer was visually observed to determine good or bad.

(6) Abrasion resistance: After the 10,000 times of abrasion resistance test evaluation using the reciprocating wear tester for the specimens of the Examples and Comparative Examples, the appearance and adhesion of the top coat layer and the undercoat layer were visually observed to determine good or bad.

(7) Scratch resistance: After the scratch resistance evaluation using a sapphire having a curvature of 0.5R at 500g load on the Example and Comparative Example specimens, the appearance and adhesion of the upper and lower coating layers of the specimen were visually observed to be good. Or it was judged as defective.

(8) Chemical resistance: Examples and Comparative Examples After specimens were immersed in five kinds of chemicals besides gasoline, they were taken out and visually observed for appearance and adhesion of the upper and lower layers of the specimen, and judged as good or poor.

(9) Sun Cream Resistance: Example and Comparative Example After applying NIVEA SUN CREAM (SPF47) to the surface of the specimen and leaving it at 100 ° C. for 1 hour, it was wiped off to visually inspect the appearance and adhesion of the upper and lower layers of the specimen. It observed and judged good or bad.

(10) Odor: Example and Comparative Example After leaving the specimen at 100 ° C. for 2 hours, it was tested whether or not the odor occurred in the enclosed space and determined as good or bad.

Referring to the results of Table 2, the embodiment according to the present invention, the adhesion between the top layer, the bottom layer and the substrate was excellent in the adhesion, chemical resistance and mechanical properties, giving a metallic feel to implement a variety of anodizing ( Anodizing) By implementing color, visual corrosion, three-dimensional and depth, it can be seen that the number of processes and costs can be reduced compared to the surface treatment method using a real metal material.

Comparative Examples 1 to 2 outside the content of the polyester polyol resin in the undercoat layer forming agent of the present invention, Comparative Example 3 outside the aluminum paste content range of the undercoat layer forming agent of the present invention and the bead content of the top coat forming agent of the present invention In the case of Comparative Examples 4 to 5 out of the range, it was found that adhesion, chemical resistance, or mechanical properties were lowered compared to the above Examples.

Simple modifications and changes of the present invention can be easily made by those skilled in the art, and all such modifications and changes can be seen to be included in the scope of the present invention.

10: base material 20: undercoat
30: Top coat 32: Unevenness
100: automotive interior

Claims (15)

Glass transition temperature (Tg): 100 parts by weight of the first acrylic polyol resin at 40 ~ 90 ℃, 5 to 40 parts by weight of polyester polyol resin, 1 to 100 parts by weight of colorant and 1 to 30 parts by weight of aluminum (Al) paste Undercoating agent; And
Glass transition temperature (Tg): a coating layer forming agent comprising 100 parts by weight of the second acrylic polyol resin and 60 to 90 ° C and 5 to 25 parts by weight of the bead; coating material for an automotive interior.
The coating agent for automobile interiors according to claim 1, wherein the first acrylic polyol resin and the second acrylic polyol resin each include two or more acrylic polyol resins having different glass transition temperatures (Tg).
The method of claim 2, wherein the first acrylic polyol resin is glass transition temperature (Tg): 40 to 50 ℃ acrylic polyol resin 20 to 50% by weight; Glass transition temperature (Tg): 20 to 50% by weight of acrylic polyol resin having a temperature greater than 50 ° C. and 70 ° C. or less; And glass transition temperature (Tg): 10 to 35% by weight of acrylic polyol resin is more than 70 ℃ 90 ℃ or less;
The second acrylic polyol resin, the glass transition temperature (Tg): 60 to 70 ℃ 70 to 60% by weight of the acrylic polyol resin; And glass transition temperature (Tg): 40 to 60% by weight of acrylic polyol resin is more than 70 ℃ 90 ℃ or less; coating material for an automotive interior.
The coating material for automobile interiors according to claim 1, wherein the polyester polyol resin has a glass transition temperature (Tg) of -20 ° C to 20 ° C.
The coating agent for automobile interiors according to claim 1, wherein the undercoat layer forming agent comprises the polyester polyol resin and the first acrylic polyol resin in a weight ratio of 1: 5 to 1:15.
The coating material for automobile interiors according to claim 1, wherein the beads have an average particle diameter of 5 to 25 µm and a specific gravity of 1.0 to 2.0.
The coating agent for automobile interiors according to claim 1, wherein the top coat layer forming agent and the bottom coat layer forming agent each further include a solvent.
The method of claim 1, wherein the aluminum paste comprises a spherical or plate-shaped aluminum (Al) powder,
The aluminum powder is an automotive interior coating agent, characterized in that the average size of 5 ~ 20㎛.
The coating agent for automobile interiors according to claim 1, wherein the colorant comprises at least one of a dye and a pigment.
The coating agent of claim 1, wherein the bead comprises at least one of silicon beads, urethane beads, and acrylic beads.
Glass transition temperature (Tg) to at least a part of the substrate: 100 parts by weight of the first acrylic polyol resin, 40 to 90 parts by weight of polyester polyol resin, 1 to 100 parts by weight of the colorant, and 1 to 100 parts of aluminum (Al) paste. Applying and curing an undercoat forming agent including 30 parts by weight to form a undercoat; And
Forming a top coat layer by coating and curing a top coat layer former including 100 parts by weight of the second acrylic polyol resin having a glass transition temperature (Tg) of 60 to 90 ° C. and 5 to 25 parts by weight of beads on the surface of the bottom coat layer. Automotive interior coating layer forming method comprising a.
12. The method of claim 11, wherein the undercoat layer and the top coat layer are formed by curing the applied undercoat layer and the topcoat layer, respectively, at 70 to 100 ° C.
materials;
It is formed on at least part of the substrate, the glass transition temperature (Tg): 100 parts by weight of the first acrylic polyol resin having a 40 ~ 90 ℃, 5 to 40 parts by weight of polyester polyol resin, 1 to 100 parts by weight of colorant and aluminum (Al An undercoat layer comprising 1 to 30 parts by weight; And
A top coat layer formed on the surface of the undercoat layer and having a glass transition temperature (Tg) of 5 to 25 parts by weight in a second acrylic polyol resin matrix having a glass transition temperature (Tg) of 60 to 90 ° C .;
Automotive interior material, characterized in that one or more irregularities are formed on the surface of the top coat layer.
The vehicle interior material according to claim 11, wherein the height of the unevenness is 0.3 to 20 µm and the longitudinal cross section is hemispherical or semi-elliptic.
The vehicle interior material according to claim 11, wherein the thickness of the undercoat layer is 3 to 15 mu m, and the thickness of the top coat layer is 20 to 35 mu m.

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