JPH0159355B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for applying metallic decoration to objects to be decorated such as glass and metal.

Conventionally, the following methods have been employed to apply metallic decoration to the surfaces of glass bottles, metal containers, etc. That is, aluminum or the like is first vacuum-deposited on the surface of the object to be decorated, and then an acrylic resin colored transparent paint is applied thereon. However, the decorated surface obtained by this method has the disadvantage that it has low hardness and is extremely easily damaged, resulting in a problem that the commercial value of the decorated object is low. For this reason, it was considered to use a cross-linked paint as a surface paint, which is expected to improve hardness, but in any case, since it is an organic paint, it was not possible to obtain sufficiently satisfactory surface hardness and various physical properties. .

This invention was made in view of the above circumstances,
The purpose of the present invention is to provide a decoration method that can apply metallic-like decorations that have extremely high hardness, are hard to scratch, and have a beautiful appearance on objects to be decorated, such as glass or metal. It is characterized by forming a shiny metal film on the surface, heating it, and immediately applying an organometallic compound solution to oxidize the organometallic compound to form a metal oxide film on the shiny metal film. .

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIGS. 1 and 2 show an example of the decorating method of the present invention in the order of steps. Reference numeral 1 in the figure is an object to be decorated made of glass, metal, heat-resistant plastic, or the like and molded into a desired shape. This decorated object 1
has been subjected to normal cleaning treatment to clean its surface. A glossy metal film 2 made of aluminum, copper, chromium, etc. is formed on a predetermined decorative surface 1a of this surface. This shiny metal film 2 is formed by an ion plating method,
The commonly used vacuum evaporation method is not used. This is because during heating in the next step, the glossy metal film 2 moves due to the low adhesion of the metal film formed by the vacuum evaporation method, resulting in a decrease in gloss.

The object to be decorated 1 on which the shiny metal film 2 has been formed in this manner is then heat-treated. This heating is
This is carried out by introducing the object to be decorated 1 into an ordinary electric resistance furnace or the like, but it is preferably carried out in a non-oxidizing atmosphere in order to prevent oxidative deterioration of the shiny metal film 2. The heating temperature is higher than the decomposition temperature of the organometallic compound applied in the next step and lower than the deformation temperature (yield temperature) of the object to be decorated 1, and usually
The temperature is 250-500℃. In this heat treatment, the object to be decorated 1 is sufficiently heated to a predetermined temperature.

In this way, the organometallic compound solution 3 is immediately applied onto the shiny metal film 2 of the object to be decorated 1 which has been sufficiently heated. (Figure 2) The organometallic compounds used here include aluminum acetylacetone, chromium acetylacetone, ferric acetylacetone, ferric acetylacetone,
Acetylacetone metal salts such as acetylacetone nickel, octylate metal salts such as cobalt octylate, manganese octylate, lead octylate, zinc octylate, etc. are used, and these are appropriately diluted with an organic solvent to form an organometallic compound solution 3. It is said that This solution 3 is applied onto the shiny metal film 2 by a conventional application method such as dipping, spraying, printing, or brushing. The organometallic compound solution 3 applied in this manner is rapidly oxidized and changed into a metal oxide because the object 1 to be decorated is sufficiently heated to a temperature higher than the decomposition temperature of the organometallic compound, and the shiny metal film 2
A metal oxide film 4 is formed thereon, and a desired decorative layer 5 is formed.
is obtained.

The metal oxide film 4 thus obtained has a unique color due to the metal in the organometallic compound and is transparent, so that the metallic luster of the underlying shiny metal film 4 is reflected on the surface. As a result, a very beautiful metallic-like decorative layer 5 is formed. Also,
Since the film 4 is made of metal oxide, it is hard, and therefore has extremely high surface hardness and is not easily damaged.The decorative layer 5 is also not easily damaged, and has a high commercial value.

Then, the object 1 to be decorated with the metal oxide film 4 formed thereon is heated at a temperature below the deformation temperature (yield temperature) of the object 1 to be decorated, if necessary, so that the shiny metal film 2 and the metal oxide film 4 are heated. The adhesion is improved.

In addition, in forming the metal oxide film 4, the object to be decorated 1 is first heated and then the organometallic compound solution 3 is applied because if these steps are reversed, the organometallic compound may sublimate during heating. Or, due to lack of oxygen, carbon in the organometallic compound is not completely oxidized and remains as soot on the shiny metal film 2.
This is because it may deteriorate the appearance. Further, in the above embodiment, the case where the decorative layer 5 is formed on the entire decorative surface of the object 1 to be decorated has been described, but the present invention is not limited to this. It can be formed on the decoration 1.

As explained above, according to the decorating method of the present invention, a shiny metal film is formed on the decorated surface of the object to be decorated,
Next, this object to be decorated is heated to a temperature higher than the decomposition temperature of the organometallic compound in a non-oxidizing atmosphere, and then an organometallic compound solution containing the organometallic compound is immediately applied onto the lustrous metal film. Since the metal in the metal compound is oxidized to form a metal oxide film on the shiny metal film, the unique color and transparency caused by the metal oxide in the well-formed metal oxide film can be obtained. As a result, the metallic luster of the underlying shiny metal film is reflected on the surface, and as a result, a very beautiful metallic-like decorative layer can be obtained. In addition, the upper layer metal oxide film has a homogeneous structure, has sufficiently high hardness, and is extremely hard to scratch, so that the beautiful appearance can be maintained for a long time, and a decorative object with high commercial value can be obtained.

[Brief explanation of drawings]

FIGS. 1 and 2 are schematic sectional views showing an example of the decorating method of the present invention in the order of steps. DESCRIPTION OF SYMBOLS 1... Decoration object, 2... Shiny metal film, 3... Organometallic compound solution, 4... Metal oxide film, 5...
Decoration layer.

Claims (1)

[Claims] 1. After forming a shiny metal film 2 on the decorated surface 1a of the object 1 to be decorated, and then heating the object 1 to be decorated in a non-oxidizing atmosphere to a temperature higher than the decomposition temperature of the organometallic compound,
By immediately applying an organometallic compound solution 3 containing the organometallic compound onto the shiny metal film 2, the metal in the organometallic compound is oxidized and a metal oxide film 4 is formed on the shiny metal film 2. A decoration method characterized by forming.