Optical: systems and elements – Mirror – With support
Reexamination Certificate
1999-09-29
2001-07-10
Sikder, Mohammad (Department: 2872)
Optical: systems and elements
Mirror
With support
C359S884000, C359S900000
Reexamination Certificate
active
06257732
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a method for forming a metallic mirror surface on a receiving surface, substrate or an article which may be used, as coated, as a decorative object, for making interior decoration ornaments, automobile parts, household electronic appliances, Buddhist altar fittings, furniture, personal accessories and the like and more particularly relates to a method and process employing a spraying based method or process for forming a metallic mirror surface on variety of materials such as metal, synthetic resin, rubber, glass, ceramic wares, wood, leather, stone, plaster, rattan, straw and the like. Solutions, such as activating treatment agent, reacting metal salts including reacting metallic salts and reaction agents are used in the method and processes as disclosed herein.
2. Description of the Prior Art
Chrome plating or spraying of chrome paint on to a receiving surface, substrate or article is known in the art.
One example of a known chromium plating process is disclosed in U.S. Pat. No. 5,401,379 wherein the chromium plating process provides for cleaning and acid treating of a metal article prior to electroplating the acid treated metal article in an electroplating solution.
A wide variety of chrome/aluminum/gold spray paints are known in the art. Several examples of typical chrome and/or aluminum or gold spray paints and the chemical compositions thereof are set forth below in Table 1:
TABLE 1
Example
Chrome Paint Product
Chemical Composition
1
SKU Number 33873
Pigment:
Aluminum
00503
Powder 1.88%;
03-CHROME ALUMINUM-13
Vehicle:
Marine Oil,
Petroleum
Resin Varnish
7.12%
Propellant
Propane
Isobutane 35%
Other:
Volatile 91%,
Alphatic &
Hydrocarbons
29.5%,
Methylene
Chloride
26.50%
2
Instant Chrome
Pigment:
Aluminum
K-Mart Corporation
Powder (Type
II-Class B)
2. 9;
Vehicle:
Petroleum
Resin 16.2%
Propellant
Propane
Isobutane 30%
Other:
Aromatic
Hydrocarbons
32.2%,
Halogentated
Hydrocarbons
30%
3
Hanks Best,
Pigment:
Aluminum
Aluminum 1603/
Powder 3.2%;
Rust Inhibitor
Vehicle:
Keytones
15.40%
Propellant
Propane
Isobutane 23%
Other:
Aromatic
Hydrocarbons
51.50%,
Xylol Solvent
100%
4
Coast-to-Coast
Pigment:
3.16%;
Metallic Silver
Standard
S79-44078
Aluminum
Powder 100%
Vehicle:
None
Disclosed
Propellant
None
Disclosed
Other:
None
Disclosed
5
Rust-Oleum
Pigment:
Gold Pigment
7270 Gold Rush
None
Metallic
Disclosed
Vehicle:
None
Disclosed
Propellant
None
Disclosed
Other:
None
Disclosed
Conventional methods for chemical plating on plastics such as ABS resins and pretreatment methods for the same are also known in the art. These chemical plating methods involve procedures of first soaking the plastics in an etching solution for 15 minutes to 30 minutes to roughen, abrade or texture the surface, then soaking the etched plastic in stannous chloride containing hydrochloric acid solution bath, washing using water, soaking in activation bath, washing again using water, soaking in plating bath for 5 minutes to 10 minutes, removing from plating bath, washing using water, and drying.
U.S. Pat. No. 3,877,998 discloses a method for treating metal surfaces, preferably after phosphating, with an aqueous solution (preferably acidic) of a melamine-formaldehyde composition and are subsequently dried, preferably by heating. The treatment is a suitable substitute for a conventional chromate rinse.
Bellini Vernici, s.r.l located in Perugia, Italy, offers for sale and sells a wide variety of products for use in car body shops. Certain of these products, referred to as surface refinishing systems, are sold under the trademarks AUTO MAGIC, BODY MAGIC and CLAY MAGIC. These products include non-silicone dressing solutions, lubri-shine solutions, nonacid wheel cleaners, multi-purpose cleaners, body wash, transparent coating referred to a TRAPARENTE M.S., and other coating solutions identified as CATALIZZATORE M.S., DILUENTE M.S. and SOLVENTE ANTISILICONE, all of which are solutions for applying a colored or transparent coating on a motor vehicle or part thereof.
Numerous problems are associated with the known prior art chrome plating processes. One significant problem is the environmental considerations. For example, in known prior art chrome plating processes, ventilation and misting systems are required to protect the workers from and to prevent chrome fumes from emanating into the working and sourrounding environment. Further, workers are required to wear appropriate breathing masks or breathing apparatus when using the process. Elaborate rinsing and capture systems are required to control, capture and dispose of the by-products and spraying residue from a typical chrome plating process.
U.S. Pat. No. 4,221,844 discloses a decoratice coating of metal, such as a chrome plated cold rolled steel, which is accomplished throught the use of a layout fluid used in tool and die work. The layout fluid comprises organic dyes, a wet nitrocellulose vehicle, denatured alcohol solvents, butyl alcohol solvents and a hydrocarbon propellant.
In the above described chemical plating methods for plating plastic or other material receiving surfaces, substrates or articles, the plastic material is soaked in a plating bath at each step of the process and large spaces are required to set up the plating baths. The entire process is also time consuming. Additionally, maintenance requirements and environmental considerations are a factor for driving up the processing costs.
Another problem associate with known prior art chrome/aluminum/gold spray paints is that the spray paints include pigments and vehicles for binding or capturing the pigment such as petroleum resins, and propellants. The quality of the resulting sprayed chrome coated surface is poor and is not metallic mirror like, the coatings contain the petroleum resins as impurities, the paint coating adhesion is minimal and the visual appearance of the spray paints do not rise to the appearance levels attained by typical chrome plating processing of material, substrates or articles.
The use of transparent and colored coatings for motor vehicles and parts thereof wear off, are not permanent coatings and need to be periodically refreshed or replaced to maintain a desired luster coating.
The decorative coating of U.S. Pat. No. 4,221,844 utilizes organic dyes suspended in a liquid vehicle formed of ingredients or elements completely different from the method, process, mixture or paint of the present invention.
SUMMARY OF THE PRESENT INVENTION
The present invention discloses and teaches a new, novel and unique method for forming a metallic mirror surface on a receiving surface. The method comprises the steps of (a) cleaning or otherwise preparing the receiving surface to be coated with a metallic mirror surface; (b) spraying on the receiving surface an activating treatment agent, which may be in solution form, containing stannous chloride and at least one precious metal salt of palladium, gold, silver or the like; and (c) separately spraying concurrently on the receiving surface having the activating treatment agent, a reacting metal salt solution and a reducing agent solution to form the metallic mirror surface.
In addition, a novel and unique hydrochloric acid solution is disclosed and taught herein wherein the solution includes about 10 cc to about 44 cc of hydrochloric acid, about 1.5 g to about 5 g of stannous chloride and about 0.001 g to about 0.005 g of palladium chloride per 1 liter of water for use as an activating treatment agent solution for forming a metallic mirror surface on a receiving surface formed by treating the receiving surface with the above described hydrochloric acid solution, as an activating treatment agent followed by a concurrent application of a reacting metal salt solution and reducing agent solution to form a metallic mirror surface on the receiving surface.
In addition, a novel and unique metal salt solution is disclosed and taught herein wherein the metal salt solution includes about 6.0 g to about 25 g of sodium hydroxide, about 20 g to about 70 g of ammonia and about 2 g to
Kanomata Yuji
Takahagi Akihiro
American Spray Coating
Meaney, Jr. Daniel J.
Sikder Mohammad
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