JP2009178618A - Coating method for obtaining metal-like product by applying coating on substrate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating method for obtaining a metal-like product by applying a coating on the substrate which overcomes the conventional problems that the feeling of cold metallic tactile cannot be obtained by the coating on a resin material, for example, the problems that the tactile becomes the plasticky feeling and that coolish feeling particular to metal cannot be obtained because the heat conductivity is small in comparison with metal. <P>SOLUTION: In the coating method for obtaining metal-like appearance by applying the coating on the substrate 1, it is characterized by forming a coating film 3 by conducting the metallic base coating on the substrate 1 after forming a coating film 2 by conducting the high heat conductive color base coating, and then applying a coating in which a glycerol ester is added to the coating comprised of a flexible resin to form a clear coating film 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a coating method in which a paint is applied on a base material such as a resin material to obtain a metallic (metallic) appearance and feel. More particularly, the present invention relates to a coating method for obtaining a metallic appearance and feel by painting a part that is made of a resin material and is required to have a metallic tone in an automobile part or the like.

  2. Description of the Related Art Conventionally, a coating method has been performed in which a paint is applied on a material that is not a metal surface, such as a synthetic resin, to give an appearance that feels metallic luster and texture.

  For example, as shown in FIG. 6 as prior art 1, a color base coating film 101 made of a polyester resin resin pigment is formed on a resin material (base material) 100 such as ABS, and acrylic or polyester resin resin glitter is formed thereon. It has been carried out by forming a metallic base coating film 102 made of a pigment and further forming a clear coating film 103 made of an acrylic resin hard resin thereon.

  JP 2004-358329 A (Prior Art 2) states that “a metallic first coat coating material containing an aluminum pigment and a fine flaky pigment, and a fine flaky pigment, or a fine flaky pigment and aluminum. A method for forming a metallic brilliant coating film, characterized in that a glittering second coating composition containing a pigment and a third coating composition, which is a clear coating composition, are sequentially applied to form a coating film and to be cured. Is disclosed.

  Furthermore, Japanese Patent Laid-Open No. 2003-19765 (Prior Art 3) states that “a base coat and a metal film are coated in this order on a substrate, and the base coat has a hydroxyl value of 91 to 203 [mgKOH / g. A metallic paint film that has a surface roughness of 0.004 to 0.148 μm, a water contact angle of 28 to 60 °, and a metal film directly coated on the undercoat film. The undercoating film contains 0.1 to 2.0% of tin chloride in the pigment weight concentration, and after forming the undercoating film on the substrate, a silver film is formed on the undercoating film by a silver mirror reaction. Manufacturing a metallic paint film. "

Further, Japanese Patent Laid-Open No. 2001-314813 (prior art 4) states that “a coating film is thinly formed on a molded product with a paint containing a metal as a base material through which light is transmitted, and the color tone of the molded product is changed from the material of the molded product. A metallic tone color is obtained by the mixed light of the reflected light reflected and the reflected light reflected from the metal in the paint.
JP 2004-358329 A (Prior Art 2) JP 2003-19765 A (Prior Art 3) JP 2001-314813 A (Prior Art 4)

  However, the conventional technique has a problem that a “metal cold tactile sensation” cannot be felt because the resin material is coated. This is because the conventional technology aims to “provide a visual metallic feeling”, and therefore a function for tactile sensation is not imparted because the appearance is important.

  For example, in the prior art, as shown in FIG. 6, since a hard resin such as an acrylic resin or a polyester resin-based resin material is overcoated on a base material (resin material), there is a problem that the tactile sensation becomes a plasticy feeling. It was.

  Furthermore, the coating with the resin material overcoated on the base material (resin material) has a problem that the “cool feeling” peculiar to the metal cannot be felt because the thermal conductivity is smaller than that of the metal.

In order to solve the above problems, in a coating method for obtaining a metallic appearance by painting a paint on a substrate,
A high thermal conductive color base coating is formed on the base material to form a coating film, then a metallic base coating is applied to form a coating film, and a coating made of a soft resin with a glycerin ester added is applied to the substrate to form a clear coating. We propose a painting method to obtain a metal preparation with a film.

  According to the present invention, in a coating method for coating on a substrate such as a resin, a metallic visual color can be obtained and a tactile sensation close to metal can be obtained.

  In addition to the softness of the resin material, which is not plastic, the surface can be softened to create a feeling of dents. I was able to get it.

  An explanation will be given based on FIGS. 1 to 5 relating to a coating method for obtaining a metallic appearance by applying a paint on a base material according to an embodiment of the present invention. FIG. 1 is an explanatory view of a coating film by the coating method of the present invention.

  In the coating method for obtaining a metallic appearance according to an embodiment of the present invention, a high thermal conductivity color base coating is performed on a base material 1 made of a hard synthetic resin material to form a high thermal conductivity color base coating film 2. The high heat conductive color base coating film 2 is made of a color base using silicone having a relatively high conductivity as a coating resin, but may be any material other than silicone that has a relatively high heat conductivity.

  Thereafter, metallic base coating is performed to form a metallic base coating film 3.

  Further, a clear coating film 4 is formed by applying a paint obtained by adding a glycerin ester to a paint made of a soft resin. The clear coating film 4 has a dent amount of 15 μm or more when the universal hardness (40 mN) is measured. Further, the clear coating film 4 is imparted with hydrophilic soot by adding a glycerin ester.

  A comparison between the coating film by the coating method of the present invention and the coating film by the metal-tone coating method of the prior art is shown in FIGS. FIG. 2 is a comparative table regarding thermal conductivity. According to the present invention, the thermal conductivity is increased by forming the high thermal conductive color base coating film 2 on the base material 1 made of a hard synthetic resin material. It can be seen that the cool feeling when touched is easier to feel than before.

  FIG. 3 is a tactile comparison table showing the presence of hydrophilic wrinkles by adding glycerin ester to the clear coating film 4, and shows the peak intensity ratio of hydroxyl groups as a result of IR analysis of the coating film surface. Yes. As shown in FIG. 3, according to the present invention, by adding a glycerin ester to the clear coating film 4, a hydrophilic wrinkle is present, and a fresh touch is imparted to the touched hand so that a cold feeling can be felt.

  FIG. 4 is a table comparing the dent amount μm of the coating film when measuring the universal hardness at 40 mN with a conventional product. As shown in FIG. 4, by forming the clear coating film 4 with a soft resin, the dent amount is three times that of the conventional one, reducing the air existing between the finger and the coating surface in contact and increasing the contact area. By doing so, the thermal conductivity can be improved.

  FIG. 5 is a comparison table comparing the feeling of cooling with a coating film formed by the coating method of the present invention, a coating film formed by the conventional coating method, and metal as a metal functional rank. As shown in FIG. 5, the coating film by the coating method of this invention is close to a metal in the cool feeling compared with the conventional product.

  The present invention is used for coating exteriors and exterior parts of automobiles and the like.

Explanatory drawing of the coating film by the coating method which is embodiment of this invention Comparison table regarding thermal conductivity of coating film by coating method of this invention and coating film by conventional coating method Comparison table of tactile sensation regarding the coating film by the coating method of the present invention and the coating film by the conventional coating method Comparison table of the dent amount regarding the coating film by the coating method of the present invention and the coating film by the conventional coating method Comparison table of metal sensory ranks regarding the coating film by the coating method of the present invention and the coating film by the conventional coating method Explanatory drawing of the coating film by the conventional metallic-tone coating method

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base material 2 High heat conductive color base coating film 3 Metallic base coating film 4 Clear coating film which added glycerol ester

Claims (1)

In a painting method to obtain a metallic appearance by painting a paint on a substrate,
A high thermal conductive color base coating is formed on the base material to form a coating film, then a metallic base coating is applied to form a coating film, and a coating made of a soft resin with a glycerin ester added is applied to the substrate to form a clear coating. A coating method to obtain a metal preparation by forming a film.

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