JPS584594B2 - Bronze Fushiyoku Die Cast - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming bronze etched die cast patterns.

Copper or copper alloys are widely used as raw materials for building materials, ornaments, Buddhist statues, etc. not only for their excellent corrosion resistance, malleability, and workability, but also for their unique texture, so-called bronze-like appearance.

In particular, copper and bronze that have turned blackish over time have a unique and elegant appearance and texture, and people are extremely fond of them.

Despite this, the main reason why these types of copper and bronze products are not widely used is that these copper and bronze products are expensive.

For this reason, decorative finishing methods that can inexpensively impart a bronze-like or even blackish color tone have been researched.

There are two currently known decorative finishing methods using paint.

One method is to apply a coating of copper or bronze powder mixed in a vehicle containing a synthetic resin binder to the material, and then acid-etch the surface to give it a corrosion-like appearance.

According to this method, it is necessary to use a strong acid such as nitric acid, sulfuric acid, or hydrochloric acid at a high concentration during etching, which poses various operational risks and also has the disadvantage that the physical properties of the coating film itself deteriorate.

Another method is to apply a solvent-based paint containing copper powder and patina to the material, polish the resulting coating to reveal the copper powder, and then apply patina and cuprous oxide on top of it. This is a method of applying paint containing

This method has the disadvantage that the cuprous oxide used lacks chemical stability, and the resulting coating film is likely to discolor, resulting in unevenness.

The present inventor has been conducting research to develop a decorative finishing method using paint that solves the above-mentioned difficulties.In this research, the inventor formed an uneven pattern on the material and After smoothing, a sealer is applied, and after drying, a blue to green paint is applied to the entire surface, and then a transparent paint containing a metal powder pigment with a copper-like metallic color such as copper powder or bronze powder is applied to achieve the desired effect. The present invention has been completed based on the discovery that the above objects can be achieved.

When carrying out the method of the present invention, first, an uneven pattern is formed on the material.

A typical method for forming an uneven pattern is to apply an inorganic or organic binder-based paint onto a material in an uneven pattern together with water or a suitable solvent as required.

The inorganic binder used at this time is cement,
Gypsum, water glass, etc. are used, and as the organic binder, synthetic resin binders such as epoxy resin, acrylic resin, polyurethane resin, etc. are used.

If necessary, extender pigments such as calcium carbonate, clay, and talc, colored pigments such as titanium dioxide, Bengara, carbon black, and phthalocyanine blue, and aggregates such as silica sand, analite, and perlite can be added to this binder. .

As a means of application, it is preferable to perform spray painting using a mortar gun, a ricing gun, or the like.

Through this step, an uneven pattern such as a large mountain range pattern, a small mountain range pattern, a lunar surface shape, an citron skin shape, and other heavy die-cast patterns are formed on the vocal material.

Next, in the present invention, this convex portion is smoothed.

By performing this smoothing step, the diamond-cast pattern becomes even more excellent.

As the smoothing means at this time, means such as a roller, a trowel, or polishing are employed.

It is preferable that the roller and trowel press be carried out before the formed uneven pattern is completely cured, and it is preferable that the polishing be carried out after the formed uneven pattern is cured.

Particularly in the present invention, when carrying out this smoothing step, means using rollers and trowels are preferable in terms of workability and work efficiency.

A sealer is then applied over this smoothed area.

This sealer stopper prevents the penetration of subsequently applied blue to green paints and clear paints having a copper or bronze-like metallic color or metal powder pigments into the smoothed area, and also prevents the smoothing of the paint. It is possible to change the surface condition of the coated portion, thereby changing the shape, color tone, and metallic feel of the resulting coating film, giving it a unique appearance.

More specifically, by applying a sealer, the gloss of the resulting coating film increases compared to when no sealer is applied, and the metallic feel is further improved.

The sealer used in the present invention has excellent sealing properties and adhesion properties, and specific examples include sealers such as epoxy resin, polyurethane resin, and wood-saturated polyester resin.

Brush coating or roller coating is preferred as the coating method.

After the sealer coating has been completed, a blue to green paint is then applied.

The paint used in this case is a blue to green pigment such as cyanine blue, cyanine green, or a mixture of these and other colors.

The method itself can be effectively applied to various methods as well.

This blue to green paint, in combination with a transparent paint containing a metal powder pigment having a copper-like metallic color applied thereon, produces a copper or bronze corrosion color.

The blue to green paint is then coated with a clear paint containing a metal powder pigment having a copper-like metallic color.

The metal powder pigment having a copper-like metallic color used in this case includes copper powder, various copper alloys such as bronze and brass, and these may be used in combination with other metals such as aluminum and stainless steel.

It is also possible to use aluminum or other metals treated to have a color tone similar to that of copper.

The particle size of these metal powders is preferably about 2 to 100 microns.

Furthermore, in the present invention, leafing metallic pigments treated with suitable processing agents such as stearic acid, organic solvents, mineral oil, etc. can also be used as long as the pigments have a copper-like metallic color. You can.

In the present invention, it is necessary to use a transparent vehicle as a vehicle in which these metal powder pigments are to be dispersed.

As these transparent vehicles, transparent vehicles mainly made of acrylic resin or polyurethane resin are used.

The ratio of the pigment to the vehicle is about 0.3 to 3% by weight in the transparent vehicle, preferably 0.5 to 3% by weight.
It is about 2.5% by weight.

The pigment volume concentration is about 0.1 to 1.7%.

At this time, if the content of the metal pigment does not reach 3% by weight, it is difficult to exhibit a copper or bronze-like appearance in the resulting coating film, and if the content of the metal pigment exceeds 3% by weight, copper or bronze corrosion-like appearance occurs. The appearance is difficult to notice.

When applying the transparent paint containing this metal pigment, it is preferable to apply it while the blue to green paint film applied in the previous step has not completely dried.

As the application means in this case, any of various application means can be effectively applied, but spray painting such as air spray or airless spray is particularly preferable in order to apply the transparent paint to the formed uneven portion.

The present invention will be specifically described below with reference to Examples.

Example: 90 parts by weight of the base of the four-tile spray paint ("Nitsushin Pony Tile" manufactured by Takashi Kubo Paint Co., Ltd.) and 10 parts of the curing agent for the appetizer.
parts by weight, and 20 parts by weight of water were added to this to give a viscosity of 5.
000 cps, and this was uniformly sprayed onto a concrete plate material (500 x 500 x 50 mm3) at an air pressure of 5 kg/cm2 using a ricing gun with a diameter of 4 mm.

Next, after drying, the same paint as above was applied with high viscosity using a mortar gun with a diameter of 10 mm at an air pressure of 5 kg/c.
A large mountain range pattern was formed by spraying at m2.

After standing for 1 hour, the formed convex portion was flattened using a plastic roller.

Next, 70 parts by weight of an epoxy resin sealer (Sunfirst SL Clear, manufactured by Takashi Kubo Paint ■) containing a liquid epoxy resin and a curing agent as main components was applied with a sponge roller and thoroughly dried.

Next, apply a blue paint of the following composition on top of this using a nozzle diameter of 1.
It was sprayed uniformly at an air pressure of 4 kg/cm2 using a 5φmm spray gun.

Composition of blue paint Two-component acrylic modified polyurethane resin Blue enamel A liquid (Pony tile topcoat No. 100 enamel A liquid: manufactured by Takashi Kubo Paint ■) 20 parts by weight Yellow enamel A
Liquid (Pony Tile Topcoat No. 100 Enamel Liquid A: manufactured by Takashi Kubo Paint ■) 24 parts by weight Black Enamel Liquid A (Pony Tile Top Coat No. 100 Enamel Liquid A: manufactured by Takashi Kubo Paint ■) 4 parts by weight White Enamel Liquid A (Pony Tile Top Coat No. 100 Enamel A liquid: manufactured by Takashi Kubo Paint ■) 32 parts by weight Two-component acrylic modified polyurethane resin Enamel liquid B (Pony tile topcoat No. 100 B liquid: 20 parts by weight manufactured by Takashi Kubo Paint ■) Thinner liquid ("Pony tile topcoat thinner": 40 140 parts by weight (manufactured by Takashi Kubo Paint) Next, a transparent paint containing metal pigments with the following composition was sprayed at an air pressure of 4 kg/cm using a spray gun with a nozzle diameter of 1.5 mm.
2 was sprayed on the uneven parts.

Metallic pigment-containing transparent paint bronze powder (Standard bronze powder "LAC KT LINING" manufactured by Asahi Etsukart Co., Ltd.) 1
．． 1 part by weight 2-component acrylic modified polyurethane resin clear liquid A (
[Pony Tile Topcoat 100 Clear Liquid A]: Manufactured by Takashi Kubo Paint ■: Solid content 33.7%) 5 6.4 parts by weight B
Liquid ("Pony Tile Top Coat Book 100B Liquid": Manufactured by Takashi Kubo Paint ■: solid content 54.0%) 14.0 parts by weight Thinning liquid ([Pony Tile Top Coat Thinner]: Manufactured by Takashi Kubo Paint ■) 2 8.5 parts by weight departmental total
100.0 parts by weight The product thus obtained had an appearance similar to so-called bronze corrosion, which is caused by the aging of copper.

Example 2 Water-based acrylic resin primer (rib cut primer;
Shin-Etsu Unit Co., Ltd.) was applied with a brush onto the material described in Example 1, and after drying for 2 hours, a paint containing a water-based acrylic copolymer resin as a binder (rib-cut embossed material;
(manufactured by Shin-Etsu Unit Co., Ltd.) was adjusted to a viscosity of 5000 cps by adding 15% water by weight, and this
It was sprayed uniformly over the entire surface at an air pressure of 5 kg/cm2 using a ricing gun.

Next, after drying, apply the same paint as above with a high viscosity and a diameter of 10φ.
A large mountain range pattern was formed by spraying with an air pressure of 5 kg/cm 2 using a mortar gun of 1.0 mm.

After standing for 18 hours, the convex portions of the coating film were flattened using an electric disc sander to obtain a gorgeous die-cast pattern.

Apply a two-component epoxy resin emulsion sealer (Hydroepoxy No. 100; manufactured by Takashi Kubo Paint Co., Ltd.) containing an epoxy resin emulsion and its curing agent as the main components to the flat part of the coating film using a roller and dry it thoroughly. Ta.

Next, a bronze corrosion approximation color and paint with the following composition were applied on top of this using a spray gun with a nozzle diameter of 1.5 mm at an air pressure of 4.
It was sprayed uniformly at kg/cm2.

Bronze corrosion approximation color paint Blue acrylic resin enamel (Acryjet enamel: manufactured by Takashi Kubo Paint ■) 25 parts by weight Yellow acrylic resin enamel (Acryjet enamel: manufactured by Takashi Kubo Paint ■) 30 parts by weight Black acrylic resin enamel (Acryjet enamel: manufactured by Takashi Kubo Paint ■) 5 parts by weight White acrylic resin enamel (Acryjet enamel: manufactured by Takashi Kubo Paint) 40 parts by weight Thinner (acryjet thinner: manufactured by Takashi Kubo Paint) 50 parts by weight Total 1
After drying 50 parts by weight, apply bronze-containing transparent paint of the following composition to a nozzle with a diameter of 1
．． Air pressure 4kg/cm2 with 5φmm spray gun
I sprayed it with

Bronze-containing transparent paint Bronze powder (Bronze Powder Resist AT: manufactured by Asahi Etsukart Co., Ltd.) 1.1 parts by weight Acrylic resin clear (Acryjet Clear: manufactured by Takashi Kubo Paint ■, solid content 37.5%) 65.9 parts by weight Thinner (Acryjet thinner: manufactured by Takashi Kubo Paint ■) 33.0 parts by weight Total: 100 parts by weight The product thus obtained had a luxurious appearance similar to so-called bronze corrosion, which occurs when bronze die casting changes over time.

Example 3 All treatments were carried out in the same manner as in Example 1 except that the amount of bronze powder used in the metal pigment-containing transparent paint used in Example 1 was changed from 1.1 parts by weight to 0.7 parts by weight.

The obtained product had a stronger bronze corrosion feel than that of Example 1, and had a bronze corrosion-like appearance with a strong ancient appearance.

Example 4 The amount of bronze powder used in Example 3 was changed from 0.7 parts by weight to 2.5 parts by weight, and all other treatments were carried out in the same manner as in Example 3.

The obtained product had a lower degree of corrosion than that of Example 1, and had the appearance that only the concave portions of the Guicast pattern were lightly corroded.

Example 5 In the bronze-containing transparent paint used in Example 2 above, copper powder (COPPEREKA CH) was used instead of bronze powder.
51/C (manufactured by Asahi Etsukart Co., Ltd.), and the other procedures were the same as in Example 2.

The obtained product was almost the same as that of Example 2 except that the reddish tone in the metal part was slightly stronger.

Example 6 In the above Example 5, 1.1 parts by weight of copper powder was replaced with 0.0 parts by weight of a bronze-colored metal powder (Fireflake Deep Gold; manufactured by Western Products, Inc., USA).
6 parts by weight was used, and all other treatments were carried out in the same manner as in Example 5.

The obtained product was almost the same as that of Example 2.

Claims (1)

[Claims] 1 After forming an uneven pattern on the material and smoothing the surface of the formed uneven area, apply a sealer to the smoothed area, then apply blue or green paint, and after drying, coat with copper or bronze-like metal. A method for forming a bronze etched die-cast pattern, which comprises applying a transparent paint containing a colored metal powder pigment.