JPH0196268A - Metallic coating compound composition - Google Patents

Abstract

PURPOSE:To obtain the titled composition providing uniform and novel appearance of coating film having excellent metallic feeling irrespective of method of coating, by blending a resin with metallic pigment consisting of scaly iron oxide having specific particle diameter and scaly metallic powder in a specific ratio. CONSTITUTION:(A) 100pts.wt. solid content of a resin is blended with (B) 50-500 pts.wt. metallic pigment consisting of (i) scaly iron oxide having 30-200mum particle size and (ii) 1-50wt.% based on sum of the components i and ii of scaly metallic powder to give the aimed composition having 20-30 poise viscosity at 20 deg.C. Stainless steel is preferable as the component ii. A resin solution dissolved in an organic solvent, resin emulsion or an aqueous solution of resin is preferable as the component A.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a metallic coating composition that provides a new metallic luster coating appearance, and more specifically, it relates to a metallic coating composition that provides a coating film appearance with a novel metallic luster. The present invention relates to a metallic coating composition that provides a coating film appearance with metallic luster.

[Conventional technology and its problems]

Conventionally, paint mixed with metal powder, commonly known as "metallic paint," is applied to the surfaces of concrete structures, plastic molded products, wood products, etc. to give these structures, molded products, products, etc. a metallic feel. is being carried out.

The metal powder used in the above metallic paint is as follows:
It is a flaky powder of aluminum, stainless steel, copper, zinc, nickel, etc., but it is cheap, it is relatively white so it is easy to color it to the desired color, and there are many types. For this reason, aluminum powder is often used, and the metallic feel of this metallic paint is due to the process in which the paint is applied and dried to form a film (
Convection occurs in the coating film during the process in which the organic solvent in organic solvent-based paints and water in water-based paints evaporates from the paint film, and this convection causes the metal powder mixed in the paint to randomly evaporate. The randomly arranged metal powder reflects light incident from each direction, creating the desired metallic feel.

The application of metallic paint to give a metallic feel is also called "metallic finish" and has been practiced for a long time.
This also has various problems as described below.

(1) In order to obtain an even and uniform metallic finish, it is necessary to arrange the metal powder in the paint film as randomly as possible. In particular, it is necessary to uniformly control the convection within the paint film layer that occurs during the drying process. It is important to. Therefore, in order to achieve this, it is necessary to apply a special spraying method so that the film thickness is uniform, and other painting methods such as brush painting, roller painting, etc. With a painting method that tends to cause unevenness, the difference in drying time causes uneven convection within the coating layer, causing metal powder to be partially aligned in the same direction, causing uneven reflection of light and creating an uneven surface. A metallic coating cannot be obtained.

(2) In addition, even with spray painting, the thickness of the paint film at the joints becomes uneven, and the arrangement of the metal powder tends to be uneven due to differences in the drying of the paint film. The problem is that it is limited to line painting.

[Problem that the invention seeks to solve]

The present invention solves the problem that the conventional metallic paints have limited coating methods, and also provides a metallic coating composition that is rich in design and can provide a novel coating appearance with an excellent metallic feel. The purpose is to provide goods.

[Means for solving problems]

That is, the metallic coating composition provided by the present invention contains scale-like iron oxide with a particle size of 30 to 200 μm and scale-like metal powder of 50 to 100 μm based on 100 parts by weight of plum fat solid content. and characterized in that the scale-like metal powder is 1 to 50 fff% of the scale-like iron oxide, thereby achieving the above object.

Although it is not necessarily clear why the metallic coating composition of the present invention having the above-mentioned structure is able to form a coating film with a uniform and even metallic feel even when the coating thickness is uneven,
It is assumed that it is approximately as follows. In other words, the scale-like iron oxide mixed in the paint exhibits a relatively slow movement with respect to the convection that occurs in the applied coating film, so even if there is a difference in convection due to drying differences, It is thought that this suppresses the occurrence of uneven arrangement of metal powder.

The resin used in the present invention is not particularly limited,
All organic solvent-based and water-based paint resins commonly used in the paint industry can be used. Specifically, synthetic resins such as nitrocellulose, ethylcellulose, alkyd resins, acrylic resins, vinyl chloride resins, vinyl acetate resins, polyamide resins, vinyl versatate resins, styrene resins, acrylonitrile resins, or natural or synthetic rubbers. These coating resins are preferably used as organic solvent solutions, emulsions, or aqueous solutions.

The scale-like iron oxide used in the present invention is available on the market, and for example, "Metaflake" manufactured by Kikuchi Color Co., Ltd., rMI OJ manufactured by Japan Inorganic Chemical Industry Co., Ltd., etc. can be used. The size of iron oxide particles is 30-200μm
, preferably 50 to 100 μm. If the particle size is less than 30 μm, the resulting coating film will have poor metallic luster;
The design becomes inferior. Also, on the contrary, 200
If it exceeds 1 IM, the coating workability will be poor and at the same time, the metallic texture will be more likely to be uneven.

Since the flaky iron oxide mentioned above is generally brownish or blackish in color, it can be used as it is as a brownish or blackish metallic paint composition with an excellent metallic feel, but in order to further enhance the design, the desired color tone can be used. It is unsuitable for coloring. Therefore, in the present invention, flaky metal powder is used in an amount of 1 to 50% by weight, preferably 5 to 30% by weight based on flaky iron oxide. Examples of flaky metal powders that can be used include white metal powders such as aluminum, stainless steel, zinc, and nickel. It is preferable to use stainless steel or nickel powder, which has excellent chemical resistance and weather resistance.

If the amount of the scale-like metal powder mixed with scale-like iron oxide is less than 1% by weight, it will be difficult to achieve the desired color tone, and if it exceeds 50% by weight, the metallic feel will become uneven and , there is a disadvantage that the price of paint will increase.

In the Metallic 40 composition of the present invention, the mixing amount of the flaky iron oxide and flaky metal powder (hereinafter referred to as "metallic pigment") is 50 to 100 parts by weight (solid content) of the coating resin. 500 parts by weight, preferably 1
If the mixing amount is less than 50 parts by weight, the absolute amount of the metallic pigment is too small and sufficient hiding properties cannot be obtained, and the disadvantage is that the arrangement of the metallic pigment is likely to be uneven. If the amount exceeds 500 parts by weight, the fluidity of the coating composition decreases, resulting in poor coating workability, and the resin component is too small, resulting in the disadvantage that the metallic pigment tends to fall off from the coating surface.

Since the metallic paint composition of the present invention uses the scale-like iron oxide and scale-like metal powder in combination as metallic pigments, it exhibits a white to gray color suitable for coloring to a desired color tone. By adding an arbitrary coloring agent, if necessary, it is possible to obtain a coating film with a metallic appearance and a color tone that is even more excellent in design. Colorants that can be used include inorganic or organic WBA I4 or dyes known in the paint industry, and specifically include azo pigments, phthalocyanine pigments, carbon black, transparent red pigments, etc.
These include various pigment pastes that are commercially available.

In particular, it is preferable to use a transparent colorant.

Furthermore, in the present invention, in addition to the above-mentioned components, various paint additives such as dispersants, antifoaming agents, leveling agents, thickeners, film-forming aids, preservatives, antifouling agents, etc. It can be used in conventional amounts.

The coating composition of the present invention can be prepared using a known dispersing machine such as a high-speed day silver, a planetary mixer, or a gate mixer.
It can be obtained by mixing and dispersing predetermined amounts of scale-like iron oxide and scale-like metal powder in the above resin. When dispersing resins and metallic pigments, dispersing machines that apply strong dispersing force, such as those that rotate a disk in a glass bead, etc., or dispersing machines such as ball mills or roll mills, are used to disperse resins and metallic pigments. This is not preferable because the iron oxide is further finely pulverized and the desired metallic feel may not be obtained.

There is no particular limitation on the viscosity of the above paint, but as the viscosity decreases, flaky iron oxide and flaky metal powder tend to settle during paint storage, so it should be set to 100 voids or more. is preferable.

There are no special restrictions on the method of applying the coating composition of the present invention,
Most coating methods known in the paint industry can be used, such as air spray, airless spray, roller coating, brush coating, trowel coating, spatula coating, and the like. Further, examples of substrates to which a metallic feel can be given by the coating composition of the present invention include concrete, ceramic materials, rubber, plastics, metals, wood, paper, cloth, and the like.

(Examples) Hereinafter, the present invention will be specifically explained with reference to Examples, but these Examples are only examples and do not limit the present invention.In addition, each component in the following Examples The blending amount is shown on a weight basis.

Examples 1 and 2 Metallic paint compositions were prepared by uniformly mixing the ingredients shown in Table 1 below in sequence using a high-speed day silver.

(Leaving space below) Table-1 Explanation of the ingredients in Table-1 (Nel) manufactured by Taisei Kako Co., Ltd., Akrit 109A02) manufactured by Dainippon Ink Chemical Co., Ltd., Boncoat (N3) manufactured by Kusumoto Kasei Co., Ltd., Disbaron 6900-0X (N4) Manufactured by Daicel Chemical Industries, Ltd., Texanol 05) Manufactured by Kikuchi Shiki Kogyo Co., Ltd., Metaflake #60 (particle size 60μ
m) (06) Kikuchi Color Industries Co., Ltd., Metaflake #80 (particle diameter 80 μm) (N7) Fukuda Metal Foil & Powder Industries Co., Ltd., stainless steel powder S530
4L (+8) Manufactured by Kusumoto Kasei Co., Ltd., Disparon 0X-70 (
+9) Manufactured by San Nobuco Co., Ltd., Nobuco Site N-54 (N10) Manufactured by San Nobuco Co., Ltd., Nopco 8034 (*) Manufactured by Yokohama Kasei Co., Ltd., Unilant 66 Blue (H2) Manufactured by Hoechst Gosei Co., Ltd., Colaneal Red FR Obtained above Each coating composition was applied to a 3 mm thick slate board by the coating method shown in Table 3 below, and the appearance of the formed coating film was evaluated. The evaluation results are also shown in Table 3.

Comparative Examples 1 and 2 In order to compare the superiority of the present invention, aluminum powder (manufactured by Toyo Aluminum Co., Ltd., flaky aluminum pigment "Alpaste 5") was used instead of flaky iron oxide and flaky metal powder.
4-452J (particle size: 30 μm) and other components similar to those in Example 1, a conventional metallic paint was mixed and dispersed in the same manner as shown in Table 2 below. It was prepared using

(The following is a blank space) Table 2 Each of the coating compositions obtained above was applied using the coating method shown in Table 3 below in the same manner as in the above example, and the appearance of the formed coating film was evaluated. The results are also shown in Table 3.

(The following is a blank space) [Effects of the Invention] The metallic paint composition of the present invention uses a specific ffi mixture of specific iron oxide powder and metal powder as a metallic pigment for giving a metallic feel. Therefore, even with coating methods that make it difficult to maintain a constant coating thickness, it is possible to obtain a uniform and even metallic feel, and it is also easy to color to the desired color tone, making it extremely practical. .

Claims (2)

[Claims] (1) Particle size 3 for 100 parts by weight of resin solid content
0 to 200 μm flaky iron oxide and flaky metal powder 5
1. A metallic coating composition containing 0 to 500 parts by weight, and characterized in that the flaky metal powder accounts for 1 to 50% by weight of the flaky iron oxide. (2) The metallic coating composition according to claim 1, wherein the flaky metal powder is stainless steel or nickel.