JPH07292294A - Metallic coating material having color flip-flop characteristic - Google Patents

Abstract

PURPOSE:To obtain a metallic coating material that varies in hue depending upon the viewing angle by dispersing at least two scaly colored metallic pigments different in color and/or a color pigment having a color different therefrom in a paint vehicle component. CONSTITUTION:This coating material contains at least two scaly colored metallic pigments (A) different in color, or a scaly colored metallic pigment of one color or those of two or more colors and a color pigment (B) different therefrom in color. The component A comprises metallic pigments each obtained by allowing a color pigment to be adsorbed on the surface of a scaly metallic pigment. The film of a coating material containing it varies in the brightness and tone of color depending on the viewing angle, i.e., the film exhibits so-called color flip-flop characteristics, since the pigments are arranged parallel to a base plate. It is desirable that the amounts of component A and component B respectively to be mixed are 10-50 pts.wt. and 0.5-100 pts.wt. based on 100 pts.wt. vehicle component resin. The color pigment adsorption on component A is preferably at least 10wt.% from the viewpoint of chroma.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel color flip-flop type metallic paint which is excellent in color flip-flop property and which can give a metallic coating film having excellent glitter.

[0002]

2. Description of the Related Art It is well known that a coating film obtained by applying a metallic paint using a flaky metal pigment exhibits flip-flop properties. Here, the flip-flop property is a property that the brightness of the coating film surface changes depending on the viewing angle.
Metallic paints exhibiting such properties are widely used as automotive paints. For example, there is a conventional mixture of a scale-like metallic pigment and a colored pigment, an interference mica whose surface is coated with titanium oxide, and a metallic paint using a colored mica whose surface is coated with iron oxide or an organic pigment. Further, a coating containing only a scale-like colored aluminum pigment (JP-A-2-142862) or a coating using a scale-like colored aluminum pigment in combination with mica (JP-A-5-70719) has been proposed.

[0003]

In recent years, the demand for cosmetics has become high, and it is strongly desired to develop a paint that forms a coating film having a color flip-flop property rather than a metallic feeling and a simple flip-flop property. ing. Here, the color flip-flop property is a property in which the hue of the coating film surface changes depending on the viewing angle. But,
It is impossible to form a coating film having such a color flip-flop property with the conventional paint as described above.

Generally, the so-called "color" is the hue, brightness,
Colors are classified according to saturation, and the basic hues are red, yellow, and blue if the pigments of each hue are mixed, red and yellow are orange, red and blue are purple, and yellow and blue are green, and three colors are mixed. It is well known that the color is achromatic (white to gray to black). In addition, red and blue are distinguished as dark red or dark blue, even if the lightness is diminished, as it is clear from the word that there is dark red or dark blue, but yellow is dark when the lightness diminishes. As is clear from the absence of the expression "yellow", it is also well known that it is easily identified as an achromatic color. Therefore, in a coating film formed of a paint containing two or more of these colored pigments, only the intermediate color is observed, and the color flip-flop property is not observed. Further, also in a coating film formed of a paint containing a colored pigment and a metallic pigment, due to the flip-flop property of the metallic pigment, the brightness of the color depending on the viewing angle is observed, but the color flip-flop property is not observed.

Further, a scale-like colored metallic pigment is disclosed in JP-A 1-3
As disclosed in 15470, it is a metallic pigment colored by adsorbing a colored pigment on the surface of a scaly metallic pigment, and the surface of the metallic pigment is covered by the colored pigment. Achromatic metallic pigments are not observed in the coating film formed with the coating composition, and metallic color tone and high color tone are observed. However, also in this case, as in the case of the coating film formed by the paint containing the colored pigment and the metallic pigment, the light and shade of the color depending on the viewing angle is observed due to the flip-flop property, but the color flip-flop property is hardly observed.

[0006]

Means for Solving the Problems As a result of earnest studies to develop a metallic coating material satisfying the above-mentioned demands, the inventors of the present invention have found that the scale-like colored metal pigment (Am) and one or more different color flakes. The present invention has been completed by discovering that the object can be achieved by applying a paint containing a colored metallic pigment (An) or a colored pigment (Bo) having a different color. That is, the present invention is a scale-like colored metal pigment (A
m) and (Am), one or more colors of scaly colored metallic pigments (An: n is an integer) and / or colored pigments (Bo) different from (Am, An). It is a characteristic color flip-flop type metallic paint.

As described above, the scaly colored metallic pigment used in the present invention is a metallic pigment colored by adsorbing a colored pigment on the surface of the scaly metallic pigment, and a coating film coated with a paint containing this. Then, the pigments are arranged in parallel with the substrate. Therefore, as in the case of the coating film formed by the paint containing the metallic pigment, the brightness of the color depending on the viewing angle is observed due to the flip-flop property. Then, for example, a coating film containing two-color scale-like colored metal pigments is specularly reflected by the light source (9
When viewed in the state of being reflected at an angle of 0 degree), the colors of all the colored pigments adsorbed on the surface of the scale-like colored metal pigment are observed, so that an intermediate color between them is observed. However, when viewed from an angle other than specular reflection, the amount of light reaching the eyes is reduced and bright colors are difficult to discern, and thus winning colors such as red and blue are observed. That is, a coating film formed of a paint containing two or more scale-like colored metallic pigments exhibits a so-called color flip-flop property in which the color changes depending on the viewing angle.

When a coating film containing scale-like colored metallic pigments and colored pigments of different colors is viewed in a state of regular reflection with respect to a light source, the transparency of the colored pigments used and scale-like colored metallic pigments are used. Depending on the blending ratio with, a large amount of light is transmitted through the coating film containing the colored pigment and is reflected from the scaly colored metallic pigment, so an intermediate color slightly similar to the color of the scaly colored metallic pigment is observed. . When viewed at an angle other than specular reflection, since the scale-like colored metal pigments are arranged in parallel to the substrate, almost no light reflected by the scale-like colored metal pigments is observed and the light diffusely reflected by the colored pigments. Only reaches the eye. That is, when a coating film containing a scale-like colored metal pigment and a colored pigment having a different color from that of the scale-like colored metal pigment is viewed in a regular reflection state with respect to a light source, an intermediate color from the color of the scale-like colored metal pigment is observed, and the regular reflection is performed. At angles other than the above, the color of the colored pigment darkened by the decrease in the amount of light is observed, and the coating film exhibits a color flip-flop property.

The scale-like colored metallic pigment used in the present invention is
A color pigment is attached to the surface of a scaly metal for pigments, and scaly color pigments of various colors can be obtained depending on the color of the pigment. Adsorption amount of color pigment to scale-like metal is 1
It is preferably 0% by weight or more. When a scale-like colored metal pigment having a small amount of adsorbing a coloring pigment is used in the coating material of the present invention, the resulting coating film has a high lightness but a low chroma and a poor color flip-flop property.

The metallic coating material of the present invention comprises one kind (Am) of the above-mentioned scale-like colored metal pigments and one or more kinds of scale-like colored metal pigments (An: n is 1 to 4) of a color different from that (Am). (Integer) and / or scale-like colored metallic pigments (Am, An) and a colored pigment (Bo) having a different color, and specifically, they are obtained by mixing and dispersing these in a vehicle component. . By mixing scale-like colored metallic pigments having different colors, the color flip-flop property is exhibited, but by using the ordinary colored pigments in combination, a delicate color tone with further excellent aesthetic properties is exhibited. As the colored pigment used in the present invention, known organic pigments and inorganic pigments can be used.

As the vehicle component, any known resin can be used as long as it is a highly transparent resin for paints. For example, a composition comprising one or more base resins selected from acrylic resins, alkyd resins, polyester resins and modified resins thereof, and a cross-linking agent selected from a polyisocyanate compound also containing an amino resin and a block compound. And so on.

In the present invention, the total amount of the scaly colored metallic pigment is preferably 5 to 70 parts by weight, more preferably 10 to 50 parts by weight, based on 100 parts by weight of the resin solid content of the vehicle component. . When used in combination with a colored pigment, the blending amount of the colored pigment is 0.1 to 150 parts by weight, particularly 0.5.
-100 parts by weight is preferred.

[0013]

The coating film obtained by the metallic coating material of the present invention exhibits a metallic effect with a variety of hues and saturations by combining the scale-like colored metallic pigments of different colors, and also depends on the viewing angle. Provided is a color tone which has a color flip-flop property in which the hue changes and which is excellent in beauty and has a wide variety of colors. Further, the same effect can be obtained by combining the scale-like colored metal pigment with a colored pigment having a different color.

[0014]

EXAMPLES The present invention will be described below with reference to Examples and Comparative Examples relating to the present invention. Table 1 collectively shows the major components of the scale-like metallic pigments, color pigments, coating resin monomers and vehicles used in this example, manufacturers and trade names.
Further, the same scale-like metal pigments (A1 to
A4) was obtained. The method for producing the scale-like metallic pigment is described in JP-A 1-3
It was produced by the method disclosed in 15470, and Table 2 shows the amount of the scale-like metal pigment, the amount of the adsorbed pigment, the amount of the coating resin, and the like.

[0015]

[Table 1]

[0016]

[Table 2]

Examples 1 to 6 Color flip-flop metallic paints prepared by mixing and dispersing 2 to 4 types (colors) of the above scale-like colored metallic pigments (A1 to A4) and the vehicle of Table 1 The mixing ratio (parts by weight) of is shown in Table 3. The color tone of the coating film using these color flip-flop metallic paints was evaluated.

[0018]

[Table 3]

The coating film for evaluation was prepared by first applying the coating material shown in Table 3 to a double-sided coated paper with a doctor blade of 4 mil, and then, after a lapse of about 20 minutes, Table 1 Was coated with a 9 mil doctor blade and then dried. The change in color tone was examined by visual observation of the obtained coating film. The color tone change is specular reflection when observed at an angle of 90 degrees to the incident light, and the observation angle is 15 degrees from the specular reflection (75 degrees for the incident light) to 110 degrees (minus for the incident light). The hue was visually determined by changing the color to 20 degrees. Further, in Examples 2, 5 and 6, the hue was also measured by a gonio color difference meter (X-Rite MA68, manufactured by X-Rite Co., USA). This device is 45
Incident white light at 15 degrees (75 degrees for incident light), 25 degrees (65 degrees for the same), 45 degrees (45 degrees for the same), 75 degrees (15 degrees for the same) , And 11
Light reflected at an angle of 0 degree (also minus 20 degrees) is split into three colors of red, blue, and green and measured, and L (brightness), a
And b (hue and saturation). L is
The larger the value is, the brighter it is. When a and b are + (plus), they are red and yellow respectively, and when- (minus), they are green and blue respectively. , Indicates that the saturation is high (vivid). The results of these measurements are shown in Table 4.

[0020]

[Table 4]

(Examples 7 to 12) One kind (color) of the scale-like colored metal pigments (A1 to A3) shown in Table 2 and one kind (color) of the colored pigments (B1 to B3) shown in Table 1 and The vehicles of Table 1 were mixed and dispersed to produce a color flip-flop type metallic paint. The blending ratio (parts by weight) is shown in Table 3.
The color tone of the coating film using these color flip-flop metallic paints was evaluated in the same manner as in Examples 1 to 6. The results are also shown in Table 4.

(Examples 13 to 15) Two kinds (colors) of the scale-like colored metallic pigments (A1 to A4) shown in Table 2 and one kind (color) of the colored pigments (B1 to B3) shown in Table 1 and The vehicles of Table 1 were mixed and dispersed to produce a color flip-flop type metallic paint. The blending ratio (parts by weight) is shown in Table 3. The color tone of the coating film using these color flip-flop metallic paints was evaluated in the same manner as in Examples 1 to 4. The results are also shown in Table 4.

(Comparative Examples 1 and 2) The scale-like metallic pigment (A), green pigment (B4) and vehicle shown in Table 1 were also used.
The scale-like green metal pigment (A4D507GR) and the vehicle shown in Table 2 were mixed and dispersed to prepare green metallic paints (Comparative Examples 1 and 2 respectively). Mixing ratio (parts by weight)
Is shown in Table 3. The color tone of the coating film using these metallic paints was evaluated in the same manner as in Examples 1 to 6. The results are also shown in Table 4.

[0024]

EFFECTS OF THE INVENTION According to the present invention, a coating film having excellent color flip-flop properties can be obtained, which greatly contributes to expanding the sales channels of automobiles and home electric appliances.

Claims (3)

[Claims] 1. A scale-like colored metal pigment (Am), (A)
m) one or more scale-like colored metallic pigments (A)
n), and a color flip-flop type metallic paint. 2. A scale-like colored metal pigment (Am), (A)
m) and a colored pigment (Bn) having a different color tone, a color flip-flop metallic coating. 3. A scale-like colored metal pigment (Am), (A)
m) one or more scale-like colored metallic pigments (A)
n) and a colored pigment (Bo) having a color tone different from that of (Am or An), a color flip-flop type metallic paint.