KR19980018278A - Method of forming a decorative paint film having a metal effect - Google Patents

Abstract

The present invention is a step of forming a base paint film having a constant surface by applying a base paint comprising a glossy material, by applying a decorative paint on the surface of the base paint film, a decoration having a thickness smaller than the constant surface and the concealed thickness A method of forming a decorative paint film exhibiting a metal effect comprising the step of forming a layer. Optionally, clear paint may be applied on the base paint film to form a clear paint film, and then a decorative layer may be formed on the clear paint film. The resulting decorative paint film has a metallic effect superimposed on the decorative layer tint to give an elegant decorative effect.

Description

Method of forming a decorative paint film with a metal effect

The present invention relates to a method of forming a decorative paint film for forming a decorative layer by drawing a color image or the like on a surface to be painted, for example, a vehicle body surface. Using the method for forming a decorative paint film according to the present invention, a bright decorative paint film having a metallic effect can be easily formed.

In recent years, so-called ink-jet printers have been used as printing devices for computers. In ink-jet printers, four colors of ink are injected through the nozzles according to pixel tones of image data stored in computer memory. Four color inks are, for example, red, blue and yellow (that is, three primary colors) ink and black ink. The four colors of ink are attached on the printing paper in the form of dots and overlap on the printing paper. Thus, the pixel color tone is reproduced on the printing paper. At this time, the nozzle is driven in the horizontal direction, and at the same time, the printing paper is driven in the vertical direction. As a result, image data can be drawn on printing paper.

The printer can only be applied to materials such as paper to be applied. However, if the image data can be drawn on a vehicle body, for example, complex decorations can be mass produced industrially.

Japanese Patent Publication (KOKAI) No. 1-110,159, Japanese Patent Publication (KOKAI) No. 1-128,841 and Japanese Patent Publication (KOKAI) No. 1-133,800 can be used to enlarge color images and print directly on wall surfaces. An automatic drawing device is proposed. In the automatic drawing device, the four nozzle unit drives in the 3D direction (eg, X-direction, Y-direction and Z-direction). Thus, with this device it is possible to magnify image data and draw on the wall surface to be drawn. Therefore, even if the decoration is complicated, it is possible to mass produce a complicated decoration industrially. As a result, if the device is used to form a paint film on an automobile exterior panel, bumper bar, molding or the like, the degree of freedom in the decorative paint film on such a part will be greatly improved.

Meanwhile, metal coatings are widely used to paint automotive exterior panels. This metal coating includes aluminum pigments, mica pigments, and the like. In general, the metal coating is prepared by the following 2-coat-and-1-bake method. In other words; First, base paint is applied to the intermediate paint film surface. Base paints include glossy materials. In the present specification, the gloss material means an aluminum pigment, a mica pigment, or the like. At this time, the clear paint is applied to the obtained base paint film surface by a wet-on-wet coating method, and then the base paint and the clear paint are heated to be baked into an integrated two layer paint film and dried.

It is expected that the ink-jet decorative coating can be used in conjunction with the metal coating to significantly improve the decorativeness of the metal coating. Japanese Patent Laid-Open (KOKAI) 7-108,216 discloses such a method. In this method, after the decorative coating on the intermediate paint film surface, the base paint and the clear paint are applied to the obtained decorative layer as a whole.

According to the method disclosed in Japanese Patent Laid-Open (KOKAI) 7-108,216, the surface properties are different between the portion where the decorative layer is present and the portion where the decorative layer is not present. As a result, the orientation of the gloss material included in the base film is different between the portion where the decorative layer is present and the portion where the decorative layer is not present. Thus, this method can form a paint film unique in decor.

However, the method disclosed in Japanese Patent Application Laid-Open (KOKAI) 7-108,216 has a drawback that the surface of the decorative layer is coated with a base paint film, so that the vivid color tone of the decorative layer is not avoided.

On the other hand, it is conceivable to mix a gloss material into the decorative paint. However, since the ink-jet method uses a nozzle having an extremely fine diameter hole, it is difficult to apply this nozzle to a gloss material generally used in automobiles. This is because the glossy material has a fairly large particle size. Even if the particle size of the gloss material is reduced to the size that can be injected through the nozzle, the resulting gloss material is reduced in gloss and an undesirable metal effect appears.

The present invention has been completed in view of the above situation. It is therefore an object of the present invention to provide a method of forming a decorative paint film which exhibits a metallic effect and a vivid color tone and which has excellent decorative properties.

1 is a schematic cross-sectional view of a decorative paint film formed according to Example 1 of the present invention.

2 is a schematic cross-sectional view of a decorative paint film formed according to Example 4 of the present invention.

1st Embodiment of this invention is a formation method of the decorative paint film which shows a metal effect, Through this, the said objective can be achieved.

This way:

Applying a base paint comprising a gloss material to form a base paint film having a constant surface; And

Applying a decorative paint to the base paint film surface to form a decorative layer having a constant surface and thinner than the concealed thickness.

Moreover, 2nd Embodiment of this invention is a formation method of the decorative paint film which shows a metal effect, Through this, the said objective can be achieved.

This way:

Applying a base paint comprising a gloss material to form a base paint film having a constant surface;

Applying clear paint to the surface of the base paint film to form a clear coating having a constant surface; And

Applying a decorative paint to the surface of the clear paint film to form a decorative layer having a constant surface and thinner than the concealed thickness.

Furthermore, the method can be modified according to the following four options.

1) The average particle diameter of the gloss material may be 10 to 30㎛.

2) The base paint contains a nonvolatile composition, and the nonvolatile composition contains 10 to 50% by weight of a glossy material.

3) The base paint film may have a brightness of 20 or more indicated by the L value.

4) When the decorative layer is laminated on the one or more base paint film and the clear paint film by the wet method, the paint film formed of the water-based paint and the paint film formed of the organic solvent-based paint may be coated alternately.

Unless otherwise stated herein, the concealment thickness means the minimum film thickness that can be concealed so that the color of the underlying coating does not appear. In addition, the nonvolatile composition means a paint component that can substantially constitute a paint film such as a resinous solid, a pigment, a plasticizer, a gloss material, and the like.

In the first embodiment of the present invention, the base paint film is first formed and then the decorative layer is formed. The base paint film may be non-cured (ie, wet) prior to forming the decorative layer, or may be pre-heated to some extent for curing. Alternatively, the base paint film can be completely cured. In addition, the decorative layer can be cured to produce a decorative paint film. In addition, a clear paint film may be preferably formed on the surface of the decorative layer to form a decorative paint film. In this case, after applying the clear paint on the non-cured decorative layer, the obtained clear paint film and the decorative layer can be integrally baked and dried. Alternatively, after curing the decorative layer, a clear paint film may be formed on the cured decorative layer.

In the decorative layer paint film thus produced, since the thickness of the decorative layer is formed thinner than the concealed thickness, the base paint film can be seen through the decorative layer. In particular, light penetrates the decorative layer to reach the base paint film and is reflected off the glossy material. The reflected light again penetrates the decorative layer and finally enters the field of view. As a result, a novel decoration can be produced in which the metal effect overlaps the color tone of the decoration layer. In addition, when the clear paint film is formed on the decorative layer, the refractive index of the clear paint film is large and the optical-path is further extended to improve the metal effect, and the clear paint film may protect the decorative layer.

In the second embodiment of the present invention, after the base paint film and the clear paint film are formed in advance, the decorative layer can be formed on the surface of the clear paint film. In the second embodiment, after curing the base paint film and the clear paint film, a decorative layer can be formed. Alternatively, when the clear paint film is uncured (ie, wet), the decorative layer and the clear paint film obtained after applying the decorative paint onto the uncured clear paint film can be cured integrally. In addition, the base paint film, the clear paint film and the decorative layer can be integrally baked and dried by the 3-coating-1-baking coating method. In addition, a second or outermost clear paint film may be formed on the surface of the decorative layer.

In the decorative layer paint film thus prepared, since the thickness of the decorative layer is formed thinner than the concealed thickness, the base paint film can be seen through the clear paint film and the decorative layer. In particular, light penetrates the decorative layer to reach the clear paint film, and also passes through the clear paint film to the base paint film. Light is then reflected off the glossy material. The reflected light passes through the clear paint film and the decorative layer and finally enters the field of view. As a result, a novel decoration can be produced in which the metal effect overlaps the color tone of the decoration layer. In addition, when the second or outermost clear paint film is formed on the decorative layer, the second clear paint film has a high refractive index and the optical path is further extended to improve the metal effect, and the second clear paint film is decorated The layer may be protected.

When the decorative paint is applied on the underlying wet coating with respect to the decorative layer, ie when the decorative paint is applied on the wet base paint film or the clear paint film, the decorative paint and the wet bottom coating can be mixed with each other. In addition, when the clear paint is applied to the surface of the wet decorative layer, the clear paint and the wet decorative layer may be mixed with each other. In such a case, the ink-jet method forms a decorative layer by reproducing fine dots, or reproduces a color tone, so that a defect may occur that the color tone of the decorative layer and its outline are blurred.

Therefore, the method can be modified according to the above four selection ranges. For example, when the decorative layer is wet laminated on at least one base paint film and a clear paint film, the paint film formed of the water-based paint and the paint film formed of the organic solvent-based paint are preferably coated alternately. According to a fourth variant, the paint prevents from mixing with each other at the interface between paint films. As a result, a clear decorative layer without spots can be formed.

As mentioned above, 1st Embodiment and 2nd Embodiment of this invention are related with the formation method of the decorative paint film which has a metal effect, respectively. Through this method it is possible to easily produce a decorative paint film having a unique metal effect and including a clear pattern. Conventional methods to date have not achieved such a unique metal effect.

By the first to fourth modifications to the first and second embodiments of the present invention, the unique metal effect through the decorative layer can be improved more clearly.

In addition, stain generation is suppressed by the fourth modification to the first and second embodiments of the present invention. As a result, the color tone of the obtained decorative layer and its contour can be improved more clearly.

The invention and its advantages can be more readily understood through the drawings and detailed description herein.

Detailed Description of the Examples

While the present invention has been described generally, it is more readily understood by reference to the following specific examples. These examples are presented for illustrative purposes and are not intended to limit the claims.

In the method of forming a decorative paint film according to the present invention, a conventional base paint can be used as the base paint. For example, the base paint can be a conventional base paint comprising a gloss material selected from the group consisting of at least aluminum pigments, mica pigments and pearlescent mica pigments. The mica pigment may include a silver plating layer formed thereon. Pearl luster mica pigments may include titanium oxide formed thereon. Preferably, the base paint can be applied on the substrate such that the base paint film thickness is 10-30 μm.

In the base paint, preferably, the average particle diameter of the gloss material may be 10-30 μm. If the average particle diameter of the gloss substance is smaller than 10 mu m, the metal effect of the obtained base paint film is not satisfactory. When the average particle diameter is larger than 30 µm, the case where the gloss substance is oriented in parallel in the obtained base film is reduced, and the metal effect of the obtained base paint film is not satisfactory. In particular, more preferably, the average particle diameter of the gloss material may be 15 to 20 μm.

It may be desirable for the base paint to include a nonvolatile composition, and the nonvolatile composition includes 10 to 50 weight percent of a glossy material. If the nonvolatile composition comprises less than 10% by weight of the gloss material, the metal effect of the resulting base paint film is not satisfactory. When the non-volatile composition comprises more than 50% by weight of the gloss material, the excessively included gloss material is less oriented in parallel in the obtained base paint film, and the metal effect of the obtained base paint film is not satisfactory. In particular, the nonvolatile composition may more preferably comprise a gloss material in an amount of about 20 to 40 weight percent.

It may also be desirable for the base paint film to have a brightness of 20 or greater, indicated by an L value. If the brightness indicated by the L value of the base paint film is less than 20, since the gloss material in the base paint film is hardly observed through the decorative layer, the obtained base paint film has no metallic effect. It should be noted that the base paint film has a hiding effect that is low enough that the underlying layer can be observed through the base paint film. At this time, the L value means the L value of the base paint film which can see the lower layer.

Decorative paints are not particularly limited to particular paints. For example, the decorative paint may be ink commonly used in the ink-jet method. Decorative paint is applied such that the decorative layer is formed to a thickness thinner than the concealed thickness. In addition, the thickness of the decorative layer may be preferably 5㎛ or less, more preferably 0.1 to 3㎛. Thus, the base paint film below the decorative layer can be seen through the decorative layer. As a result, the obtained decorative paint film has a unique metal effect. The concealment thickness of the decorative paint depends on the specific pigment contained in the decorative pigment and the concentration of this particular pigment.

When the particular pigment is a yellow or red pigment, the decorative pigment comprises a nonvolatile composition, which nonvolatile composition may comprise the specific pigment in a concentration of preferably 30 to 70% by weight, more preferably 40 to 50% by weight. Can be. When the particular pigment is a blue pigment, the decorative pigment comprises a nonvolatile composition, which may comprise the specific pigment in a concentration of preferably 10 to 60% by weight, more preferably 20 to 30% by weight. have. When the particular pigment is a black pigment, the decorative pigment comprises a nonvolatile composition, which non-volatile composition may comprise the specific pigment in a concentration of preferably 5 to 30% by weight, more preferably 10 to 20% by weight. have. If the concentration of a particular pigment exceeds the upper limit, the decorative paint obtained has a considerably thinner concealment thickness, making it difficult to apply a decorative paint to produce a decorative layer having a thickness thinner than the concealed thickness. When the obtained decorative paint is applied such that the concentration of a particular pigment is below the minimum limit and the decorative layer has a desirable color tone, the obtained decorative layer may frequently flow. On the other hand, when the concentration of a specific pigment is between the highest or lowest limit, the amount of decorative pigment injected can be adjusted to apply a decorative pigment of a specific color in turn to apply decorative paint to form a decorative layer thinner than the concealed thickness. have. In addition, it should be noted that the thickness of the decorative layer thus prepared is an optimum thickness such that the obtained decorative layer has a desirable color tone and hardly flows.

In addition, in the present decorative paint film forming method, clear paint may be applied to the surface of the decorative layer to form a clear paint film. At this time, it is preferable that the thickness of a clear paint film is 20-100 micrometers.

Hereinafter, the present invention will be described in detail through examples and comparative examples.

Example 1

Coated plates were prepared by electrodepositing the steel sheets followed by intermediate coating. Acrylmelamine organic solvent-based paint was then applied to the coated plate at a thickness of about 15 μm. The acrylic-melamine organic solvent based paint was metallic silver and contained about 40% by weight of the nonvolatile composition. The nonvolatile composition contained 14% by weight of aluminum pigment, 1% by weight of blue pigment and a small amount of black pigment with respect to 100% by weight of the total base paint.

The coated plate with the base paint was heated for 5 minutes to precure the base paint. Subsequently, a decorative paint film was applied to the surface of the base paint film obtained by the ink-jet method using a water-based ink. The aqueous ink each had a composition as shown in Table 1 below. The obtained decorative layer contained the flower pattern derived from image data. Image data was obtained by scanning a picture of a flower using an image scanner. The thickness of the decorative layer thus formed was up to about 1.5 μm (ie, less than concealed thickness).

Yellow ink Red ink Blue ink Black ink Pigment Concentration (PHR) ^* 50 50 30 15 Suzy Water soluble acrylic resin Organic solvent 14 wt% water 76 wt% ^* PHR means parts for 100 parts of resin.

Subsequently, an acrylic-melamine organic solvent-based clear paint was applied to the surface of the formed decorative layer and the base paint film surface on which the decorative layer was not formed, respectively, at a thickness of about 30 μm. Finally, the coated paint plate with clear paint was baked at 140 ° C. for 30 minutes and dried to complete the decorative paint film of Example 1.

The decorative paint film thus prepared is schematically shown in FIG. 1. The decorative paint film is composed of an intermediate paint film 1, a base paint film 2, a decoration layer 3 and a clear paint film 4. The base paint film 2 was formed on the surface of the intermediate paint film 1. The decorative layer 3 was partially formed on the surface of the base paint film 2. The clear paint film 4 was formed on the surface of the decorative layer 3 and the surface of the base paint film 2.

In the obtained decorative paint film, the decorative layer 3 could be seen through the clear paint film 4. Also, the base paint film 2 could be seen through the decorative layer 3. Furthermore, in the part where the decorative layer 3 was not formed, the base paint film 2 was seen through the clear paint film 4. Therefore, the floral pattern contained in the decorative layer 3 could be observed clearly in metallic silver of the base paint film 2. At the same time, the metallic luster obtained from the aluminum pigment could be observed in the decorative layer 3. Therefore, this decorative paint film had the decorativeness which did not exist previously.

Example 2

After applying the base paint, it was baked at 140 ° C. for 30 minutes and dried. Unless otherwise stated, the decorative paint film of Example 2 was completed in the same manner as in Example 2.

As a result, decorativeness formed the decorative paint film like Example 1.

Example 3

After applying the base paint, a decorative paint film was applied without preheating, and after application of the clear paint, it was baked and dried at 140 ° C. for 30 minutes to integrate three layers (ie, base paint film, decorative layer and clear paint film). . Unless otherwise stated, the decorative paint film of Example 3 was completed in the same manner as in Example 1.

As a result, the decorative paint film thus produced was slightly blurry but had decorativeness that was not present. Slightly blurry was apparent because the decorative layer was stained with base paint and clear paint.

Example 4

Plate-shaped products were prepared. The product was made of polypropylene and coated with monomers. This monomer mainly included chlorinated polypropylene. An acrylic-melamine organic solvent based paint was then applied on a plate-shaped article at a thickness of about 15 μm. The acrylic-melamine organic solvent based paint exhibited a metallic cumulus color and included 40% by weight of the nonvolatile composition. The nonvolatile composition contained 2% by weight aluminum pigment, 6% by weight mica pigment and 20% by weight red pigment, relative to 100% by weight of the total base paint.

The acrylic-melamine organic solvent-based clear paint was then applied at a thickness of about 30 μm on the plate-shaped article to which the base paint was applied. The product was then heated at 120 ° C. for 30 minutes to integrally bake and dry the base paint film and clear paint film.

The geometric pattern was then applied to the clear paint film surface by ink-jet method using water based ink. The water-based ink had the same composition as in Example 1. Geometric patterns were made on computer monitors. The thickness of the decorative layer thus formed was up to about 2 μm (ie, less than concealed thickness).

Finally, acrylic-melamine organic solvent-based clear paint was applied to the formed decorative layer surface and the first (or middle) clear paint film surface without the decorative layer, each about 30 μm thick. The decorative paint film of Example 4 was then completed by heating the plate-shaped product at 120 ° C. for 30 minutes.

2 schematically shows the decorative paint film prepared above. In the obtained decorative paint film, the decorative layer 3 could be observed through the clear paint film 4. In addition, the base paint film 2 could be observed through the decorative layer 3 and the intermediate clear paint film 5. In addition, the part in which the decorative layer 3 is not formed was able to observe the base paint film 2 through the clear paint film 4 and the intermediate clear paint film 5. Thus, the geometric patterns included in the decorative layer 3 could be clearly observed in the metallic cumulus color of the base paint film 2. At the same time, the metallic luster derived from the aluminum pigment and the mica pigment could be observed in the decorative layer 3. Thus, the decorative paint film had a decoration that did not exist previously.

Examples 5-14

Examples 5 to 9 were prepared in the same manner as in Example 1, except that the pigment concentration of the ink used as the decorative paint was varied as shown in Table 2 below.

Thus, except that the pigment concentration of the ink used as the decorative paint is varied as shown in Table 2, Examples 10 to 14 were prepared in the same manner as in Example 4.

Pigment concentration (% by weight) observe evaluation Yellow ink Red ink Blue ink Black ink Preferred Examples 5 and 10 30 30 20 10 Although a decorative paint film having a metallic effect was produced, the overall color was bright. Great Preferred Examples 6 and 11 40 40 30 20 A decorative paint film having a metal effect was produced, but a slightly lighter color as a whole Great Preferred Examples 7 and 12 50 30 20 20 A decorative paint film with a metallic effect was prepared, but the color was slightly dark yellow. Great Preferred Examples 8 and 13 30 50 20 10 A decorative paint film with a metallic effect was prepared, but the overall slightly reddish color Great Preferred Examples 9 and 14 50 50 50 30 A decorative paint film with a metallic effect was prepared, but a slightly dark blue color as a whole. Great

From Table 2, decorative paint films with decorativeness not present were prepared in Examples 5-14. It should be noted that the decorative paint film thicknesses of Examples 5 to 14 are thinner than the concealment thickness even in the portions where a large number of color inks overlap.

Example 15

As the base paint, another acrylic-melamine mica metal base paint was used. The acrylic-melamine mica metal base paint contained 40% by weight of the nonvolatile composition. The nonvolatile composition contained 4.4% by weight of aluminum pigment, 4.3% by weight of mica, 0.1% by weight of red pigment, 0.2% by weight of yellow pigment and 3.4% by weight of white pigment, based on 100% by weight of the total base paint. This aluminum pigment had an average particle diameter of 15 µm. The dolomite pigment had an average particle diameter of 18 μm. Unless otherwise stated, the decorative paint film of Example 15 was prepared in the same manner as in Example 1. It should be noted that the base paint film of Example 15 has a brightness represented by an L value of 55 and the thickness of the decorative layer is at most about 2 μm (ie less than concealed thickness).

In the decorative paint film thus prepared, a flower pattern having a unique metal effect was drawn on the metallic mica color. Thus, the decorative paint film had a decoration that did not exist previously.

Example 16

As the base paint, another acrylic-melamine mica metal base paint was used. The acrylic-melamine mica metal base paint contained 40% by weight of the nonvolatile composition. The nonvolatile composition contained 1.0 wt% of aluminum pigment, 3.0 wt% of red mica pigment and 8.0 wt% of red pigment, based on 100 wt% of the total base paint. This aluminum pigment had an average particle diameter of 11 micrometers. The cumulus pigment had an average particle diameter of 15 µm. Unless otherwise stated, the decorative paint film of Example 16 was prepared in the same manner as in Example 1. It should be noted that the base paint film of Example 16 has a brightness indicated by the L value of 25 and the thickness of the decorative layer is at most about 2 μm (ie less than concealed thickness).

In the decorative paint film thus prepared, a flower pattern having a unique metal effect was drawn on the metallic cumulus color. Thus, the decorative paint film had a decoration that did not exist previously.

Example 17

As the base paint, another acrylic-melamine mica metal base paint was used. The acrylic-melamine mica metal base paint contained 40% by weight of the nonvolatile composition. This nonvolatile composition contained 19.0 wt% of aluminum pigment, 1.0 wt% of blue pigment, and trace amounts of black pigment with respect to 100 wt% of the total base paint. This aluminum pigment had an average particle diameter of 11 micrometers. Unless otherwise stated, the decorative paint film of Example 17 was prepared in the same manner as in Example 1. It should be noted that the base paint film of Example 17 has a brightness represented by an L value of 74 and the thickness of the decorative layer is at most about 2 μm (ie less than concealed thickness).

In the decorative paint film thus prepared, a flower pattern having a unique metal effect was drawn on the metallic blue color. Thus, the decorative paint film had a decoration that did not exist previously.

Example 18

As the base paint, another acrylic-melamine mica metal base paint was used. The acrylic-melamine mica metal base paint contained 40% by weight of the nonvolatile composition. The nonvolatile composition contained 4.2 wt% of aluminum pigment, 1.0 wt% of blue pigment and 4.0 wt% of white pigment, based on 100 wt% of the total base paint. This aluminum pigment had an average particle diameter of 22 µm. Unless otherwise stated, the decorative paint film of Example 18 was prepared in the same manner as in Example 1. It should be noted that the base paint film of Example 18 has a brightness indicated by the L value of 68 and the thickness of the decorative layer is at most about 2 μm (ie less than the concealed thickness).

In the decorative paint film thus prepared, a flower pattern having a unique metal effect was drawn on the metallic blue color. Thus, the decorative paint film had a decoration that did not exist previously.

Example 19

As the base paint, another acrylic-melamine mica metal base paint was used. The acrylic-melamine mica metal base paint contained 40% by weight of the nonvolatile composition. This nonvolatile composition contained 10.0% by weight of red mica pigment and 9.0% by weight of red pigment, respectively, relative to 100% by weight of the total base paint. This red mica pigment had an average particle diameter of 15 µm. Unless otherwise stated, the decorative paint film of Example 19 was prepared in the same manner as in Example 1. It should be noted that the base paint film of Example 19 has a brightness indicated by the L value of 46 and the thickness of the decorative layer is at most about 2 μm (ie less than the concealed thickness).

In the decorative paint film thus prepared, a flower pattern having a unique metal effect was drawn on the metallic cumulus color. Thus, the decorative paint film had a decoration that did not exist previously.

Example 20

Coated plates were prepared by electrodepositing the steel sheets followed by intermediate coating. The white polyester-melamine paint was then applied to the coated plate at a thickness of about 35 μm and baked at 140 ° C. for 30 minutes. Mica base paint was then applied to the surface of the white polyester-melamine paint film at a thickness of about 15 μm. Mica base paints contained 40% by weight of nonvolatile composition. The nonvolatile composition included 6.0 wt% of the respective mica pigments relative to 100 wt% of the total base paint. The white mica pigment was 18 micrometers in average particle diameter. Unless otherwise stated, the decorative paint film of Example 20 was prepared in the same manner as in Example 1. Note that the base paint film of Example 20, formed on the white polyester-melamine paint film, has a brightness indicated by the L value of 79 and the thickness of the decorative layer is at most about 2 μm (ie, less than concealed thickness). shall.

In the decorative paint film thus prepared, a flower pattern having a unique metallic effect was drawn in metallic dolomite color. Thus, the decorative paint film had a decoration that did not exist previously.

Example 21

As the base paint, another acrylic-melamine metal base paint was used. The acrylic-melamine metal base paint contained 40% by weight of the nonvolatile composition. The nonvolatile composition contained 3.0 wt% of aluminum pigment, 0.1 wt% of red pigment, 0.2 wt% of yellow pigment and 3.4 wt% of white pigment, based on 100 wt% of the total base paint. This aluminum pigment had an average particle diameter of 15 µm. Unless otherwise stated, the decorative paint film of Example 21 was prepared in the same manner as in Example 1. It should be noted that the base paint film of Example 21 has a brightness of 48 indicated by the L value, and the thickness of the decorative layer is at most about 2 μm (ie, less than the concealed thickness).

In the decorative paint film thus prepared, a flower pattern having a unique metallic effect was drawn in metallic color. The decorative paint film was not exactly equivalent to Examples 15-20 but had decorativeness that was not present.

Example 22

As the base paint, another acrylic-melamine metal base paint was used. The acrylic-melamine metal base paint contained 40% by weight of the nonvolatile composition. The nonvolatile composition contained 25.0 wt% of aluminum pigment, 0.1 wt% of red pigment, 0.2 wt% of yellow pigment and 3.4 wt% of white pigment, based on 100 wt% of the total base paint. This aluminum pigment had an average particle diameter of 11 micrometers. Unless otherwise stated, the decorative paint film of Example 22 was prepared in the same manner as in Example 1. It should be noted that the base paint film of Example 22 has a brightness represented by an L value of 65 and the thickness of the decorative layer is at most about 2 μm (ie less than concealed thickness).

In the decorative paint film thus prepared, a flower pattern having a unique metallic effect was drawn in metallic color. The decorative paint film was not exactly equivalent to Examples 15-20 but had decorativeness that was not present.

Example 23

As the base paint, another acrylic-melamine metal base paint was used. The acrylic-melamine metal base paint contained 40% by weight of the nonvolatile composition. The nonvolatile composition contained 20.0 wt% of aluminum pigment, 0.1 wt% of red pigment, 0.2 wt% of yellow pigment and 3.4 wt% of white pigment, based on 100 wt% of the total base paint. This aluminum pigment had an average particle diameter of 8 micrometers. Unless otherwise stated, the decorative paint film of Example 23 was prepared in the same manner as in Example 1. It should be noted that the base paint film of Example 23 has a brightness represented by an L value of 52 and the thickness of the decorative layer is at most about 2 μm (ie, less than concealed thickness).

In the decorative paint film thus prepared, a flower pattern having a unique metallic effect was drawn in metallic color. The decorative paint film was not exactly equivalent to Examples 15-20 but had decorativeness that was not present.

Example 24

As the base paint, another acrylic-melamine mica metal base paint was used. The acrylic-melamine mica metal base paint contained 40% by weight of the nonvolatile composition. This nonvolatile composition contained 10.0% by weight of red mica pigment and 9.0% by weight of red pigment, respectively, based on 100% by weight of the total base paint. This red mica pigment had an average particle diameter of 35 µm. Unless otherwise stated, the decorative paint film of Example 24 was prepared in the same manner as in Example 1. It should be noted that the base paint film of Example 23 has a brightness indicated by an L value of 34 and the thickness of the decorative layer is at most about 2 μm (ie less than concealed thickness).

In the decorative paint film thus prepared, a flower pattern having a unique metal effect was drawn on the metallic cumulus color. The decorative paint film was not exactly equivalent to Examples 15-20 but had decorativeness that was not present.

Example 25

As the base paint, another acrylic-melamine mica metal base paint was used. The acrylic-melamine mica metal base paint contained 40% by weight of the nonvolatile composition. This non-volatile composition comprises 3.0 weight percent of white mica pigment, 3.0 weight percent of blue mica pigment, 2.0 weight percent of black pigment, 0.2 weight percent of green pigment and 2.0 weight percent of blue pigment, based on 100 weight percent of the total base paint. It became. This blue mica pigment was 17 micrometers in average particle diameter. Unless otherwise stated, the decorative paint film of Example 25 was prepared in the same manner as in Example 1. It should be noted that the base paint film of Example 25 has a brightness indicated by the L value of 14 and the thickness of the decorative layer is at most about 2 μm (ie less than concealed thickness).

In the decorative paint film thus prepared, a flower pattern having a unique metallic effect was drawn in metallic color. The decorative paint film was not exactly equivalent to Examples 15-20 but had decorativeness that was not present.

Table 3 below summarizes the gloss content in the base paints used in Examples 15-25, the average particle diameter of the gloss material and the L value of the resulting base paint film.

division Al pigment Mica pigment L-value, Bayesian film Decoration Content (% by weight) Average particle size (㎛) Content (% by weight) Average particle size (㎛) Preferred Example 15 4.4 15 4.3 18 55 Great Preferred Example 16 1.0 11 3.0 15 25 Great Preferred Example 17 19.0 11 - - 74 Great Preferred Example 18 4.2 22 - - 68 Great Preferred Example 19 - - 10.0 15 46 Great Preferred Example 20 - - 6.0 18 79 Great Preferred Example 21 3.0 15 - - 48 Superior or inferior Preferred Example 22 25.0 11 - - 65 Superior or inferior Preferred Example 23 20.0 8 - - 52 Superior or inferior Preferred Example 24 - - 10.0 35 34 Superior or inferior Preferred Example 25 - - 6.0 17 14 Superior or inferior

As a result of evaluation of the decorative paint film of Examples 15-25, it is preferable that the present method of forming a decorative paint film is defined as follows. For example, the content of the gloss material is preferably in the range of 10 to 50% by weight, more preferably 20 to 40% by weight, relative to 100% by weight of the nonvolatile composition of the base paint. The average particle diameter of the gloss substance is preferably in the range of 15 to 20 µm, more preferably 15 to 20 µm. As for L value by a base paint film, 20 or more are preferable.

Example 26

Plate-shaped products were prepared. The product was made of polypropylene and coated with monomers. This monomer mainly included chlorinated polypropylene. The product was then preheated at 120 ° C. for 5 minutes. An acrylic-melamine organic solvent based paint was then applied to the product at a thickness of about 15 μm. The acrylic-melamine organic solvent based paint exhibited a metallic silver color and included 40% by weight of the nonvolatile composition. The nonvolatile composition contained 14% by weight of aluminum pigment, 1% by weight of blue pigment and a small amount of black pigment with respect to 100% by weight of the total base paint.

The acrylic-melamine organic solvent-based clear paint was then applied onto a plate-like article with a base paint applied to a thickness of about 30 μm. The product was then heated at 120 ° C. for 30 minutes to integrally bake and dry the base paint film and clear paint film.

A decorative layer was then formed on the plate-shaped article having the base paint film and the intermediate clear paint film by ink-jet method using water-based ink. The water-based ink contained pigments of the concentrations shown in Table 1 above. The obtained decorative layer contained a flower pattern derived from image data. Similar to Example 1, image data was created by scanning flower photos using an image scanner. The thickness of the decorative layer thus formed was up to about 1.5 μm (ie, less than concealed thickness).

Finally, an acrylic-melamine organic solvent-based clear paint was applied to a base paint film, an intermediate clear paint film, and a plate-shaped article coated with a decorative layer at a thickness of about 30 μm. The clear paint was then baked at 120 ° C. for 30 minutes to complete the decorative paint film of Example 26.

As a result, the decorative paint film thus prepared contained a flower pattern clearly drawn in metallic silver. The floral pattern also showed a unique metal effect. Thus, the decorative paint film had decorativeness that could not be obtained by conventional coating methods.

Example 27

After applying silver metal base paint and acrylic-melamine clear paint on the plate-shaped product, an organic solvent-based ink is used to form a decorative layer, and the water-based clear paint is finally applied to the base paint film, the intermediate clear paint film and the decorative layer. The decorative paint film of Example 27 was completed in the same manner as in Example 26, except that the decorative paint film of Example 27 was formed on the product having the outermost clear paint film.

As a result, the decorative paint film thus prepared contained a flower pattern vividly painted in metallic silver. The floral pattern also showed a unique metal effect. Thus, the decorative paint film had decorativeness that could not be obtained by conventional coating methods.

Example 28

Plate-shaped products were prepared. The product was made of polypropylene and coated with monomers. This monomer mainly included chlorinated polypropylene. The product was then preheated at 120 ° C. for 5 minutes. The acrylic-melamine organic solvent based paint was then applied to the product at a thickness of about 15 μm and preheated at 120 ° C. for 5 minutes. The acrylic-melamine organic solvent based paint exhibited a metallic silver color and included 40% by weight of the nonvolatile composition. The nonvolatile composition contained 14% by weight of aluminum pigment, 1% by weight of blue pigment and a small amount of black pigment with respect to 100% by weight of the total base paint.

Subsequently, a water-based ink was used to form a decorative layer on the plate-shaped article having the base paint film by the ink-jet method. The water-based ink contained pigments of the concentrations shown in Table 1 above. The obtained decorative layer contained a flower pattern derived from image data. Similar to Example 1, image data was created by scanning flower photos using an image scanner. The thickness of the decorative layer thus formed was up to about 1.5 μm (ie, less than concealed thickness).

Finally, acrylic-melamine organic solvent-based clear paint was applied to a plate-shaped article having a base paint film and a decorative layer at a thickness of about 30 μm. The clear paint film, base paint film and decorative layer were then baked at 120 ° C. for 30 minutes to complete the decorative paint film of Example 28.

As a result, the decorative paint film thus prepared contained a flower pattern clearly drawn in metallic silver. The floral pattern also showed a unique metal effect. Thus, the decorative paint film had decorativeness that could not be obtained by conventional coating methods.

Example 29

The decorative paint film of Example 29 was prepared, except that the silver metal base paint was not previously dried and the silver metal base paint was applied on the plate-shaped product to immediately form a decorative layer using water-based ink. 28 was completed in the same manner.

As a result, the decorative paint film thus prepared contained a flower pattern vividly painted in metallic silver. The floral pattern also showed a unique metal effect. Therefore, the decorative paint film had a decoration which was not obtained by conventional coating methods.

Example 30

The decorative paint of Example 30, except that the silver metal base paint film is formed using an aqueous paint, the decorative layer is formed using an organic solvent ink, and the clear paint film is formed using an aqueous clear paint. The film was completed in the same manner as in the preferred embodiment.

As a result, the produced decorative paint film had a floral pattern clearly drawn in metallic silver. The flower pattern also exhibited a unique metallic effect. Therefore, the decorative paint film of this invention had the decorativeness which could not be obtained by the conventional coating method.

Example 31

A water-based paint is used to form a metallic silver base paint film, and the metallic silver base film is not dried in advance, and the metallic silver base paint is applied onto the plate-shaped workpiece, and immediately after the organic solvent-based ink is used to form a decorative layer. Then, it carried out similarly to Example 28 except having formed a clear paint film using water-based clear paint, and completed the decorative paint film of Example 31.

As a result, the produced decorative paint film had a floral pattern clearly drawn in metallic silver. The flower pattern also exhibited a unique metallic effect. Therefore, the decorative paint film of this invention had the decorativeness which could not be obtained by the conventional coating method.

Example 32

The decorative paint film of Example 32 was completed in the same manner as in Example 28 except that a decorative layer was formed using an organic solvent-based ink and a clear paint film was formed using an organic solvent-based clear paint. .

As a result, the produced decorative paint film had a floral pattern clearly drawn in metallic silver. The flower pattern also exhibited a unique metallic effect. The sharpness and the metallic effect of the floral pattern appearing in the decorative paint film of Example 32 did not correspond exactly to those of Examples 28 to 31, but the decorative paint film had decorative properties that could not be obtained by conventional coating methods.

Example 33

A decorative paint film of Example 33 was completed in the same manner as in Example 28 except that a decorative layer was formed using water-based ink and a clear paint film was formed using water-based clear paint.

As a result, the produced decorative paint film had a floral pattern clearly drawn in metallic silver. The flower pattern also exhibited a unique metallic effect. The sharpness and the metallic effect of the floral pattern appearing in the decorative paint film of Example 33 did not correspond exactly to those of Examples 28 to 31, but the decorative paint film had decorative properties that could not be obtained by conventional coating methods.

Example 34

As in Example 28, except that a metallic silver paint film is formed using an organic solvent paint, a decorative layer is formed using an organic solvent ink, and a clear paint film is formed using an aqueous clear paint. It carried out and completed the decorative paint film of Example 34.

As a result, the produced decorative paint film had a floral pattern clearly drawn in metallic silver. The flower pattern also exhibited a unique metallic effect. The sharpness and the metallic effect of the floral pattern appearing in the decorative paint film of Example 34 did not correspond exactly to that of Examples 28 to 31, but the decorative paint film had decorative properties that could not be obtained by conventional coating methods.

Example 35

The same procedure as in Example 28 was carried out except that a metallic silver paint film was formed using an organic solvent paint, a decorative layer was formed using an aqueous ink, and a clear paint film was formed using an aqueous clear paint. , The decorative paint film of Example 35 was completed.

As a result, the produced decorative paint film had a floral pattern clearly drawn in metallic silver. The flower pattern also exhibited a unique metallic effect. The sharpness and the metallic effect of the floral pattern appearing in the decorative paint film of Example 35 did not correspond exactly to those of Examples 28 to 31, but the decorative paint film had decorative properties that could not be obtained by conventional coating methods.

Example 36

The same procedure as in Example 28 was carried out except that a metallic silver paint film was formed using water-based paint, a decorative layer was formed using water-based ink, and a clear paint film was formed using organic solvent-based clear paint. , The decorative paint film of Example 36 was completed.

As a result, the produced decorative paint film had a floral pattern clearly drawn in metallic silver. The flower pattern also exhibited a unique metallic effect. The sharpness and the metallic effect of the floral pattern appearing in the decorative paint film of Example 36 did not correspond exactly to those of Examples 28 to 31, but the decorative paint film had decorative properties that could not be obtained by conventional coating methods.

Example 37

Organic solvent-based paints are used to form metallic silver base paint films, without drying the metallic silver base paint films, and immediately after applying the metallic silver base paint films to the plate-shaped workpieces, the organic layer-based ink is used to form the decorative layer. It carried out similarly to Example 28 except having formed and forming a clear paint film using water-based clear paint, and completed the decorative paint film of Example 37.

As a result, the produced decorative paint film had a floral pattern clearly drawn in metallic silver. The flower pattern also exhibited a unique metallic effect. The sharpness and the metallic effect of the floral pattern appearing in the decorative paint film of Example 37 did not correspond exactly to those of Examples 28 to 31, but the decorative paint film had decorative properties that could not be obtained by conventional coating methods.

Example 38

The organic solvent-based paint is used to form the metallic silver base paint film, without drying the metallic silver base paint film, and after the metallic silver base paint is applied onto the plate-like workpiece, a water-based ink is used to form a decorative layer. , The same procedure as in Example 28 was carried out except that a clear paint film was formed using water-based clear paint to complete the decorative paint film of Example 38.

As a result, the produced decorative paint film had a floral pattern clearly drawn in metallic silver. The flower pattern also exhibited a unique metallic effect. The sharpness and the metallic effect of the floral pattern appearing in the decorative paint film of Example 38 did not correspond exactly to those of Examples 28 to 31, but the decorative paint film had decorative properties that could not be obtained by conventional coating methods.

Example 39

Water-based paint is used to form a metallic silver base paint film, without drying the metallic silver base paint film, immediately after applying the metallic silver base paint on the plate-like workpiece, a water-based ink is used to form a decorative layer, and organic The decorative paint film of Example 39 was completed in the same manner as in Example 28 except that the clear paint film was formed using a solvent-based clear paint.

As a result, the produced decorative paint film had a floral pattern clearly drawn in metallic silver. The flower pattern also exhibited a unique metallic effect. The sharpness and floral effect of the floral pattern appearing in the decorative paint film of Example 39 did not correspond exactly to that of Examples 28 to 31, but the decorative paint film had decorative properties that could not be obtained by conventional coating methods.

Example 40

Except for forming a metallic silver paint film using an organic solvent paint, forming a decorative layer using an organic solvent ink, and forming a clear paint film using an organic solvent clear paint. It carried out similarly and completed the decorative paint film of Example 40.

As a result, the produced decorative paint film had a floral pattern clearly drawn in metallic silver. The flower pattern also exhibited a unique metallic effect. The sharpness and floral effect of the floral pattern appearing in the decorative paint film of Example 40 did not correspond exactly to that of Examples 28 to 31, but the decorative paint film had decorative properties that could not be obtained by the conventional coating method.

Example 41

Organic solvent-based paints are used to form metallic silver paint films, and the metallic silver base paint film is not dried, and the organic solvent-based ink is used to form a decorative layer immediately after applying the metallic silver base paint onto a plate-like workpiece. Then, it carried out similarly to Example 28 except having formed the clear paint film using organic solvent type clear paint, and completed the decorative paint film of Example 41.

As a result, the produced decorative paint film had a floral pattern clearly drawn in metallic silver. The flower pattern also exhibited a unique metallic effect. The sharpness and the metallic effect of the floral pattern appearing in the decorative paint film of Example 41 did not correspond exactly to those of Examples 28 to 31, but the decorative paint film had decorative properties that could not be obtained by conventional coating methods.

Example 42

Implemented in the same manner as in Example 28, except that a metallic silver paint film was formed using water-based paint, a decorative layer was formed using water-based ink, and a clear paint film was formed using water-based clear paint. The decorative paint film of Example 42 was completed.

As a result, the produced decorative paint film had a floral pattern clearly drawn in metallic silver. The flower pattern also exhibited a unique metallic effect. Although the sharpness and the metallic effect of the floral pattern appearing in the decorative paint film of Example 42 did not correspond exactly to those of Examples 28 to 31, the decorative paint film had decorative properties that could not be obtained by conventional coating methods.

Example 43

Water-based paint is used to form a metallic silver paint film, without drying the metallic silver base paint film, and after applying the metallic silver base paint on the plate-like workpiece, a water-based ink is used to form a decorative layer, and the aqueous clear The decorative paint film of Example 43 was completed in the same manner as in Example 28, except that the paint was used to form a clear paint film.

As a result, the produced decorative paint film had a floral pattern clearly drawn in metallic silver. The flower pattern also exhibited a unique metallic effect. The sharpness and the metallic effect of the floral pattern appearing in the decorative paint film of Example 43 did not correspond exactly to that of Examples 28 to 31, but the decorative paint film had decorative properties that could not be obtained by conventional coating methods.

Having described the contents of the present invention in detail, those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention including the claims.

According to the present invention, it is possible to obtain a decorative paint film in which a metallic effect is superimposed on a decorative layer color tone and an elegant decorative effect appears.

Claims (18)

Applying a base paint comprising a gloss material to form a base paint film having a constant surface; Applying a decorative paint on the surface of the base paint film to form a decorative layer having a predetermined surface and a thickness thinner than the concealed thickness. The method of claim 1, The average particle diameter of the said glossiness substance is 10-30 micrometers, The formation method of the decorative paint film characterized by the above-mentioned. The method of claim 1, Wherein said base paint comprises a volatile composition, said volatile composition comprising from 10 to 50% by weight of said gloss material. The method of claim 1, The brightness of the said base paint film is 20 or more by L value, The formation method of the decorative paint film characterized by the above-mentioned. The method of claim 1, And the decorative layer is laminated on the base paint film by a wet method, and the paint film formed of the water-based base paint, and the paint film formed of the organic solvent paint are coated alternately. The method of claim 1, Wherein said decorative paint comprises a nonvolatile composition, said volatile composition comprising from 30 to 70 weight percent of a yellow pigment. The method of claim 1, Wherein said decorative paint comprises a non-volatile composition, said volatile composition comprising from 30 to 70% by weight of a red pigment. The method of claim 1, Wherein said decorative paint comprises a non-volatile composition, said non-volatile composition comprising from 10 to 60% by weight of a blue pigment. The method of claim 1, Wherein said decorative paint comprises a non-volatile composition, said non-volatile composition comprising 5 to 30 weight percent of a black pigment. The method of claim 1, The thickness of the base paint film is 10 to 30㎛ characterized in that the forming method of the decorative paint film. The method of claim 1, The thickness of the said decorative layer is 5 micrometers or less, The formation method of the decorative paint film characterized by the above-mentioned. The method of claim 1, Applying a clear paint to the surface of the decorative layer to form a clear paint film. The method of claim 12, The thickness of the said clear paint film is 20-100 micrometers, The formation method of the decorative paint film characterized by the above-mentioned. The method of claim 12, A method of forming a decorative paint film, wherein the decorative paint is preheated before the clear paint application. The method of claim 12, Baking decorative paint prior to application of said clear paint. The method of claim 1, And the base paint is preheated before the decorative paint is applied. The method of claim 1, Baking a base paint prior to applying said decorative paint. Applying a base paint comprising a gloss material to form a base paint film having a constant surface; Applying a clear paint on the surface of the base paint film to form a clear paint film having a constant surface; Applying a decorative paint on the surface of the clear paint film to form a decorative layer having a thickness that is thinner than a constant surface and a concealed thickness.