JP3297826B2 - Deep feeling improvement coating - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-layer coating film having an excellent sense of depth and depth, and is particularly useful for finishing high-grade paint on automobile outer panels.

[0002]

2. Description of the Related Art Munsell value (V) is 0
By applying a metallic paint containing a tabular mica-like iron oxide pigment to the colored coating films of Nos. To 6, it is possible to obtain a multi-layered coating film that shows a glittering glitter under the direct sunlight and has a three-dimensional effect. It is already known (for example, JP-A-1-254279). However, the coating process is complicated because the colored coating film and the metallic coating film have a multi-layer structure, and the feeling of depth is not sufficient because the clear coating film containing no coloring pigment contains a bright pigment. Have the following defects.

[0003] In particular, in a high-end passenger car, there is a strong demand that a coating film having an excellent sense of depth and depth be finished, and the above-mentioned conventional method is insufficient.

An object of the present invention is to form a coating film having a single layer and excellent depth and depth. As a result, the Munsell value (V) is set to 0 to 6 and the area of the brilliant pigment is increased. Ratio or area ratio and particle size distribution range, and the area of the brilliant pigment in each area divided in area order is included in the specific range from the average value, or each divided area The object ratio can be achieved by taking the area ratio of the brilliant pigment contained in the vertical axis as Log (logarithmic) on the vertical axis and adjusting the slope of the regression line for each point of the graph arranged in the horizontal axis on the area order. And completed the present invention.

[0005] That is, the present invention provides the following coating film for improving the sense of depth.

[0006]

(1) including a glitter pigment and a coloring pigment,
The Munsell value (V) is in the range of 0 to 6, and the particle size distribution of the glittering pigment is included in each of the divided areas obtained by equally dividing a plurality of the glittering pigments in the area order of the glittering pigments. The area ratio of the total area of the brilliant pigment to a predetermined range is calculated, and the difference (maximum deviation) between the average value of the area ratios in all the divided areas and the area ratio in each of the divided areas is 0.89.
% Or less, having a sense of depth.

(2) including a glitter pigment and a coloring pigment,
The Munsell value (V) is in the range of 0 to 6, and the area ratio of the glittering pigment on the formed coating surface is 0.1 to 20.
%, And the area of the total area of the glittering pigment included in each of the divided areas obtained by equally dividing the particle size distribution of the glittering pigment into the area of each glittering pigment in a predetermined range. The difference (maximum deviation) between the average value of the area ratios in all the divided areas and the area ratio in each of the divided areas is 0.89% or less. Layer coating.

(3) including a glitter pigment and a coloring pigment,
The Munsell value (V) is in the range of 0 to 6, and the area ratio of the glittering pigment on the formed coating surface is 0.1 to 20.
% And the glittering pigment has an average particle size distribution of 1
１４０140 μm, calculating the area ratio of the total area of the glittering pigments contained in each of the divided areas obtained by equally dividing the glittering pigments in the order of the area of each glittering pigment to a predetermined range, and dividing the entire area thereof The difference (maximum deviation) between the average value of the area ratio in the area and the area rate in each of the divided areas is 0.89.
% Or less, having a sense of depth.

(4) including a glitter pigment and a coloring pigment,
The Munsell value (V) is in the range of 0 to 6, and is included in each divided area obtained by equally dividing the particle size distribution range of the glitter pigment into a plurality of areas in the area of each glitter pigment. The area ratio of the total area of the bright pigment to a predetermined range is calculated, and the vertical axis represents the log (logarithmic) area ratio, and the horizontal axis represents the points of the graph arranged in order from the divided areas in the area order of the bright pigment. The slope of the regression line is -4.92 × 10 ^-5
(1 / μm ² ) or more, a single-layer coating film having a sense of depth.

(5) a glitter pigment and a color pigment,
The Munsell value (V) is in the range of 0 to 6, and the area ratio of the glittering pigment on the formed coating surface is 0.1 to 20.
%, And a predetermined range of the total area of the glittering pigment included in each divided area obtained by equally dividing the particle size distribution range of the glittering pigment into a plurality of areas in the order of the area of each glittering pigment. The area ratio is calculated, and the vertical axis is Log (logarithmic).
Area ratio, the horizontal axis indicates that the slope of the regression line with respect to each point of the graph arranged in order from the divided areas in the area of the glitter pigment is -4.92 × 10 ⁻⁵ (1 / μm ² ) or more. A single-layer coating with a characteristic depth.

(6) including a glitter pigment and a coloring pigment,
The Munsell value (V) is in the range of 0 to 6, and the area ratio of the glittering pigment on the formed coating surface is 0.1 to 20.
% And the glittering pigment has an average particle size distribution of 1
１４０140 μm, calculate the area ratio to a predetermined range of the total area of the glitter pigments included in each divided area obtained by equally dividing the glitter pigments into the plurality of areas in the order of the area of the glitter pigments. Log (logarithmic) area ratio, and the abscissa indicates the slope of the regression line for each point of the graph arranged in order from the divided area of the glittering pigment in the order of -4.92 × 10 ^-5 (1
/ Μm ² ) or more.

(7) A multilayer coating film formed by forming a clear coating film on the coating surface of any of the above (1) to (6) .

The single-layer coating film of (1) to (6) of the present invention is a liquid film obtained by dissolving or dispersing a glitter pigment, a coloring pigment, and a resin composition in a solvent (organic solvent and / or water). It is formed by applying paint to the object,
It is necessary to use the above specific pigment as the glitter pigment.

The brilliant pigment is a metallic pigment having a brilliant brilliant sensation and showing a particularly remarkable brilliance in sunlight, and specifically includes mica-like iron oxide (MIO), thick aluminum and the like. can give.

In the single-layer coating films (1) to (3) of the present invention, the glitter pigment particularly preferably satisfies all of the following conditions (a) to (c).

(A) The area ratio on the formed coated surface is 0.1 to
20%. When the area ratio is less than 0.1%, the brilliant feeling is reduced, and when the area ratio is more than 20%, the sense of depth is reduced, and in any case, the object of the present invention is difficult to achieve.

The area ratio is an area ratio of the visible glitter pigment occupying a predetermined range of the formed cured coating film surface or the formed coating surface, and is set in the single-layer coating film and is not visible. Pigments are not included. Here, the area ratio is determined by the following method.

The "predetermined range" is defined as a painted surface (width 32 mm × 2).
6 mm) image area (512 x 480 pixels)
That is.

Light is radiated from the light source onto the coating film, the light is received at an angle at which specularly reflected light is not incident, and a predetermined range of the coating film is binarized into a high-luminance portion and a low-luminance portion according to luminance. The number ni of dots of each area Si of the island-shaped high-brightness portion surrounded by is obtained, and the total area (Si × n) of the high-brightness portion is determined.
i) / Area ratio is determined by the area of a predetermined range.

FIG. 1 shows a specific example of an apparatus for measuring the area of a brilliant pigment in a coating film. The coated plate 1 having a coating film is placed at an angle θ with respect to a horizontal plane, and illuminates the coated plate 1 with the pseudo sunlight 4 from a light source 2 in a vertical direction. The light source 2 is a solar simulator, and emits light substantially equivalent to sunlight. CCD to receive at an angle where regular reflection light does not enter
A camera (television camera) 3 is arranged. The CCD camera 3 is located at a position where the regular reflection light of the light 4 emitted from the light source 2 on the coating film surface is not received. The CCD camera 3
Is divided into the above-described pixels, and the luminance of each pixel is converted into a binary value of 0 (low luminance portion) and 1 (high luminance portion), and the binary value is input to the frame memory and stored. The binarized data stored in the frame memory is converted into corresponding electric signals, respectively, and input to a computer, and the area and number of each high-luminance section, the total area of the high-luminance section based thereon, and a predetermined range (standard The area ratio of the high-luminance portion in (area) is calculated.

For example, simulated sunlight 4 is applied from a light source 2 to a painted plate 1.
32m of the coating surface by CCD camera 3 while irradiating
F number 16, focal length 50mm in the range of mx 26mm
The photograph is taken at a magnification of 0.4 times with the lens. Angle θ is 2
It can be varied from 0 to 35 °. The captured image is divided into 512 × 480 pixels and subjected to computer processing. The luminance of each pixel is divided into a high luminance part (1) and a low luminance part (0), and is surrounded by (0). A portion consisting of only the island-shaped (1) is examined, and the number of pixels of (1) in the portion is calculated to be a photographing area of one pixel of 3.4722 × 10 ³ μm.
^{The value} obtained by multiplying ² is defined as the dot area, that is, the individual area Si of the glitter pigment. Then, the number ni of dots was obtained for each Si of each area, an area histogram was created, Si × ni was calculated for each area Si, and the area ratio was calculated by dividing by a predetermined area A.

(B) The average particle size distribution range is 1 to 140 μm
That. Outside this range, the object of the present invention is difficult to achieve. The measurement of the particle size range can be performed by a method known per se.

(C) The area ratio of the total area of each of the glitter pigments contained in each of the divided areas obtained by equally dividing the glitter pigment into a plurality of areas in the area of the glitter pigments with respect to a predetermined range. Is calculated, and the difference between the average value of the area ratios in all the divided areas and the area ratio in each of the divided areas is equal to 0.
89% or less. That is, the glitter pigment is divided into a plurality (preferably three or more) in the order of the area of each glitter pigment. Next, the total area ratio of the brilliant pigment in each of the divided areas is determined as described above.
Then, the average value of the obtained area ratios of the brilliant pigment in each area is obtained, and the difference between the average value and the area ratio of the brilliant pigment in each area is included in 0.89% or less. It is necessary. If the difference between the average value and the area of the brilliant pigment in each area is larger than 0.89%, the sense of depth and the sense of depth are reduced, and the object of the present invention is difficult to achieve.

The method for preparing a metallic pigment satisfying the conditions (a) to (c) can be carried out, for example, according to the conditions for synthesizing these pigments and the conditions for extending the pigments.

It is particularly preferable that the glitter pigment used in the single-layer coating film of the above (4) to (6) has the above conditions (a) and (b) and the following condition (d).

(D) Calculating the area ratio of the total area of the glittering pigment included in each of the divided areas obtained by equally dividing the glittering pigment into a plurality of areas in the area of the glittering pigment with respect to a predetermined range. The vertical axis represents the Log (logarithmic) area ratio, and the horizontal axis represents the slope of the regression line at -4.92 × for each point of the graph sequentially arranged from the divided areas in the area of the glittering pigment.
It should be 10 ^-5 (1 / μm ² ) or more.

The area ratio of the total area of the brilliant pigments contained in each of the divided areas to the predetermined range is determined in the same manner as described in the above (A). Is measured and divided by a predetermined range. The log (logarithmic) area ratio is plotted on the vertical axis, and the gradient of the regression line with respect to each point of the graph obtained by plotting the respective area ratios is determined by arranging the divided areas in order of the area of the glitter pigment on the horizontal axis. But-
It is necessary to be 4.92 × 10 ⁻⁵ (1 / μm ² ) or more. This inclination is -4.92 × 10 ^-5 (1 / μm ² )
A smaller size is not preferred because the feeling of depth and depth of the coating film is reduced.

[0029] The single-layer coating film of the present invention comprises
It is formed by applying a liquid paint which is mixed and dispersed with a coloring pigment, a resin composition and a solvent (organic solvent and / or water).

The coloring pigment is used for adjusting the Munsell value (V) of the formed coating film within the range of 0 to 6. The Munsell value (V) is the lightness of the three components of color (lightness, hue and saturation). If the Munsell value (V) is larger than 6, it is not preferable because it is too bright and the depth and depth of the glittering pigment cannot be sufficiently exhibited. As the pigment, known pigments can be used, and the lightness can be adjusted by their type, ratio, and blending amount.

The resin composition is a main component for forming the single-layer coating film, and is particularly preferably a thermosetting resin composition capable of forming a coating film having excellent finished appearance and durability. A thermosetting resin composition comprising a base resin such as an acrylic resin, a polyester resin, or an alkyd resin and a crosslinking agent such as an amino resin or a polyisocyanate compound (including a blocked product) is preferable. The solvent is preferably an organic solvent, but may be water. These liquid paints can be applied in a solvent solution form, a non-aqueous dispersion form, an aqueous dispersion form, an aqueous form and the like.

In the present invention, the single-layer coating film may be directly formed on an object to be coated such as metal or plastic.
It is preferable that an undercoat, an intermediate paint, or the like is applied to these substrates in advance to form these coating films. The single-layer coating film is formed by dissolving or dispersing the glitter pigment, the coloring pigment, and the resin composition in a solvent (organic solvent and / or water), by spray coating, electrostatic coating, dip coating. It is usually formed by coating at a temperature of 100 to 180 ° C.

In the present invention, a clear paint can be further applied to the single-layer coating film to form a multilayer coating film. As the clear coating, a thermosetting resin composition capable of forming a coating film having excellent finished appearance and durability is preferable,
For example, a thermosetting resin composition comprising a base resin such as an acrylic resin, a polyester resin, or an alkyd resin and a crosslinking agent such as an amino resin or a polyisocyanate compound (including a blocked product) is preferable. The solvent is preferably an organic solvent, but may be water. These clear paints can be applied in a solvent solution form, a non-aqueous dispersion form, an aqueous dispersion form, an aqueous solution form and the like. In addition, it is preferable to add a coloring pigment or a dye to the clear coating so as not to hinder the transparency, since the depth and the depth can be further improved. The multi-layer coating film is obtained by applying a liquid coating and a clear coating for forming the single-layer coating film in a two-coat one-bake system or a two-coat two-bake system. These coating and curing methods can be performed in the same manner as described above.

[0034]

【The invention's effect】

(1) Since the Munsell value (V) was adjusted to 0 to 6 and the size distribution of the glitter pigment was adjusted as described above, a coating film having an excellent depth and depth was obtained.

(2) Since it is a single-layer coating film, the coating process is simplified.

[0036]

Next, examples of the present invention and comparative examples will be described.

Examples 1 to 3 and Comparative Example 1 An epoxypolyamine-based cationic electrodeposition paint (trade name “Electron No. 9000 Black”,
(Manufactured by Kansai Paint Co., Ltd.) (hardened film thickness: 20 μm) and aminoalkyd resin intermediate coating (trade name “ES Primer TP-16 Gray”, manufactured by Kansai Paint Co., Ltd.)
A steel sheet coated with (cured film thickness 30 μm) is prepared. Both of these coatings were cured by heating.

Then, a brilliant organic solvent type thermosetting paint obtained by mixing and dispersing the compositions shown in Table 1 below was spray-coated on the coated steel sheet so as to have a film thickness of about 20 μm (cured coating film). After leaving at room temperature for several minutes, it was cured by heating at 140 ° C. for 30 minutes.

[0039]

[Table 1]

The product of the individual area of the glitter pigment and the number of the glitter pigments contained in each of the divided areas equally divided into a plurality of areas in the order of the area of the glitter pigment is determined for each of the divided areas, and Table 2 shows the area ratio (%) divided by the area.

[0041]

[Table 2]

In Table 2, M1 to M4 are all 17
Evenly divided. Division 1 is the smallest grain and then progressively larger, and division 17 is the largest. The width of each divided area is 5.2083 × 10 ³ μm ² / piece.

Examples 4 to 6 and Comparative Example 2 The glitter pigments used in the above Examples and Comparative Examples were replaced with those shown in Table 3 below to prepare glitter organic solvent type thermosetting paints. Painted.

[0044]

[Table 3]

The slope of the regression line in Table 3 is shown in FIGS.

Examples 7 to 12 and Comparative Examples 3 to 4 In the same manner as in the above Examples and Comparative Examples, a brilliant organic solvent type thermosetting paint was applied, left at room temperature for 5 minutes, and further subjected to a clear paint or color clear. Paint thickness 40μm
(Cured coating) was applied by spray coating and heated at 140 ° C. for 30 minutes to simultaneously cure both coatings (2 coats 1
Baking method).

The clear paint is an organic solvent type thermosetting paint mainly composed of an acrylic resin and a butylated melamine resin. The color clear paint is an organic solvent type thermosetting paint obtained by adding a small amount of phthalocyanine blue to the clear paint. It is a curable paint.

Table 4 shows the performance test results.

[0049]

[Table 4]

[0050]

[Brief description of the drawings]

FIG. 1 is a specific example of an apparatus for measuring the area of a glitter pigment in a coating film.

FIG. 2 shows a state of a slope of a regression line in Example 4 (Table 3).

FIG. 3 shows a state of a slope of a regression line in Example 5 (Table 3).

FIG. 4 shows a state of a slope of a regression line in Example 6 (Table 3).

[Explanation of symbols]

 1 painted board 2 light source 3 CCD camera 4 pseudo sunlight

Continued on the front page (72) Inventor Hiroshi Hattori 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Co., Ltd. (72) Inventor Takaaki Suzuki 41 No. 41, Chukuji Yokomichi, Nagakute-cho, Aichi-gun, Aichi 1 Toyota Chuo Co., Ltd. Inside the research institute (72) Inventor Takashi Wada 41-41, Yokomichi, Nagakute-cho, Aichi-gun, Aichi Prefecture Inside of Toyota Central Research Laboratory Co., Ltd. Inside Toyota Central R & D Labs. (72) Inventor Masato Ishiguro Kanagawa Automobile Co., Ltd. (72) Inventor Kenichi Sada Kenichi Nishiki, Yokosuka City, Kanagawa Prefecture Kansai Paint Co., Ltd. In-company (56) References JP-A-5-70719 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B05D 5/06 B05D 7/14

Claims (7)

(57) [Claims] 1. A pigment containing a glitter pigment and a coloring pigment, wherein the Munsell value (V) is in the range of 0 to 6 and the particle size distribution of the glitter pigment is evenly distributed in the order of the area of each glitter pigment. Calculate the area ratio of the total area of the brilliant pigment included in each of the plurality of divided areas with respect to a predetermined range, the average value of the area ratios in all the divided areas, and the area ratio in each of the divided areas. The difference (maximum deviation) is 0.89% or less. 2. A pigment containing a glitter pigment and a coloring pigment, wherein the Munsell value (V) is in the range of 0 to 6, and
The area ratio of the glittering pigment on the formed coating surface is 0.1 to 20%, and the particle size distribution of the glittering pigment is divided into a plurality of pieces in the order of the area of each glittering pigment. The area ratio with respect to a predetermined range of the total area of the brilliant pigment included in the area is calculated, and the difference (maximum deviation) between the average value of the area ratio in all the divided areas and the area ratio in each of the divided areas is calculated. A single-layer coating film having a sense of depth characterized by being 0.89% or less. 3. A pigment containing a glitter pigment and a coloring pigment, wherein the Munsell value (V) is in the range of 0 to 6, and
The area ratio of the glitter pigment on the formed coating surface is 0.1 to 20%, and the particle size distribution range of the glitter pigment is 1 to 14 on average.
At 0 μm, the area ratio of the total area of the glitter pigment contained in each of the divided areas obtained by equally dividing the glitter pigment into a plurality of areas in the order of the area of the glitter pigment is calculated, and the entire divided area is calculated. Wherein the difference (maximum deviation) between the average value of the area ratio and the area ratio in each of the divided areas is 0.89% or less. 4. A pigment containing a brilliant pigment and a coloring pigment, wherein the Munsell value (V) is in the range of 0 to 6, and the particle size distribution range of the brilliant pigment is equal to the area of each of the brilliant pigments. Calculate the area ratio of the total area of the brilliant pigment included in each of the plurality of divided areas with respect to a predetermined range, the ordinate indicates the Log (logarithmic) area ratio, and the abscissa indicates the area of the brilliant pigment. The slope of the regression line with respect to each point of the graph arranged in order from the first divided area is -4.92 × 10 ^-5 (1 /
μm ² ) or more. 5. A pigment containing a glitter pigment and a coloring pigment, wherein the Munsell value (V) is in the range of 0 to 6, and
The area ratio of the glitter pigment on the formed coating surface is 0.1 to 20%, and the particle size distribution range of the glitter pigment is divided into a plurality of pieces in the order of the area of each glitter pigment. The area ratio of the total area of the glitter pigments included in the divided area to a predetermined range is calculated, and the vertical axis is Log (logarithm) area ratio, and the horizontal axis is the divided areas in the order of the area of the glitter pigment. The slope of the regression line for each point in the graph
A single-layer coating film having a sense of depth characterized by being at least 4.92 × 10 ⁻⁵ (1 / μm ² ). 6. A pigment containing a glitter pigment and a coloring pigment, wherein the Munsell value (V) is in the range of 0 to 6, and
The area ratio of the glitter pigment on the formed coating surface is 0.1 to 20%, and the particle size distribution range of the glitter pigment is 1 to 14 on average.
At 0 μm, the area ratio of the total area of the brilliant pigment to the predetermined range included in each of the divided areas obtained by equally dividing the brilliant pigment in the order of the area of each brilliant pigment was calculated. (Logarithmic) area ratio, the slope of the regression line for each point of the graph in which the abscissa is arranged in order from the divided area of the glittering pigment in the area order is -4.92 × 10 ^-5 (1 / μ)
m ² ) or more. 7. A multi-layer coating film formed by forming a clear coating film on the surface of the coating film according to claim 1 .