NANOCOMPOSITE COATING AND THE METHOD OF COATING THEREOF
US20120027939A1
2012-02-02
13/251,845
2011-10-03
Abstract:
A nanocomposite coating and a method of coating for protecting a product with the nanocomposite coating are presented. Firstly, the nanocomposite coating is prepared, wherein the nanocomposite coating is formed by mixing 22.5˜49.5% nanometer inorganic oxide gel made by a sol-gel method, 45˜74.25% organic solvent and 1˜10% nanometer powder together. Next, the nanocomposite coating is coated onto surfaces of the product evenly by way of spraying, dipping or roll-to-rolling. Lastly, the product coated with the nanocomposite coating is subjected to a room temperature or a heating environment lower than 170 degrees centigrade to make the nanocomposite coating dry for forming nanometer protective films on the surfaces of the product.
Assignee:
- CHENG UEI PRECISION INDUSTRY CO., LTD. 169 🇹🇼 Taipei Hsien, Taiwan
Interested in similar patents?
Get notified when new applications in this technology area are published.
Classification:
C09C1/62 » CPC main
Treatment of specific inorganic materials other than fibrous fillers ; Preparation of carbon black Metallic pigments or fillers
C09D1/00 » CPC further
Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
C09D5/08 » CPC further
Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced ; Filling pastes Anti-corrosive paints
C09D7/61 » CPC further
Features of coating compositions, not provided for in group ; Processes for incorporating ingredients in coating compositions; Additives non-macromolecular inorganic
C09D7/67 » CPC further
Features of coating compositions, not provided for in group ; Processes for incorporating ingredients in coating compositions; Additives characterised by particle size Particle size smaller than 100 nm
B05D5/00 » CPC further
Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
B05D7/02 » CPC further
Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
B05D2401/32 » CPC further
Form of the coating product, e.g. solution, water dispersion, powders or the like the coating being applied in other forms than involving eliminable solvent, diluent or dispersant applied as powders
C01P2004/64 » CPC further
Particle morphology; Particles characterised by their size Nanometer sized, i.e. from 1-100 nanometer
C01P2004/84 » CPC further
Particle morphology; Particles consisting of a mixture of two or more inorganic phases two phases having the same anion, e.g. both oxidic phases one phase coated with the other
C08K3/08 » CPC further
Use of inorganic substances as compounding ingredients; Elements Metals
C08K3/22 » CPC further
Use of inorganic substances as compounding ingredients; Oxygen-containing compounds, e.g. metal carbonyls; Oxides; Hydroxides of metals
B05D3/02 IPC
Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
B82Y99/00 IPC
Subject matter not provided for in other groups of this subclass
Description
CROSS REFERENCE
This is a divisional of U.S. application Ser. No. 12/276,117, filed on Nov. 21, 2008, which is incorporated herewith by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention generally relates to a coating and uses thereof, and more particularly to a nanocomposite coating and a method of coating for protecting a product with the nanocomposite coating.
2. The Related Art
At present, lots of products are made of engineering plastic materials. However, some engineering plastic materials, such as polycarbonate and modified polyphenylene oxide, are easily corroded and damaged by some exterior chemicals, such as organic alcohol, organic ketone, acid, alkali and oil etc. In order to protect the products made of the foregoing engineering plastic materials from being corroded and damaged, a nanocomposite coating and a method of coating for protecting the products with the nanocomposite coating are required.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a nanocomposite coating and a method of coating for protecting a product with the nanocomposite coating. The nanocomposite coating is formed by mixing a nanometer inorganic oxide gel, an organic solvent and a nanometer powder together. The nanometer inorganic oxide gel is made by a sol-gel method and has 22.5˜49.5% weight in the nanocomposite coating. The organic solvent has 45˜74.25% weight in the nanocomposite coating. The nanometer powder has 1˜10% weight in the nanocomposite coating. The method is adapted to protect the product from being corroded and damaged by some exterior chemicals and is described hereinafter. Firstly, prepare the foregoing nanocomposite coating. Next, coat the nanocomposite coating onto surfaces of the product evenly by way of spraying, dipping or roll-to-rolling Lastly, subject the product coated with the nanocomposite coating to a room temperature or a heating environment lower than 170 degrees centigrade to make the nanocomposite coating dry for forming nanometer protective films on the surfaces of the product so as to protect the product from being corroded and damaged by the exterior chemicals.
As described above, the nanocomposite coating of the present invention can protect the product from being corroded and damaged by the exterior chemicals by way of forming the nanometer protective films on the surfaces of the product.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
A nanocomposite coating according to the present invention is a mixture of a nanometer inorganic oxide gel, an organic solvent and a nanometer powder, wherein the weight percentage of the nanometer inorganic oxide gel, the organic solvent and the nanometer powder in the nanocomposite coating is respectively 22.5˜49.5%, 45˜74.25% and 1˜10%. The nanometer inorganic oxide gel is made by a sol-gel method and can be any one of or a mixture of at least two selected from a nanometer silicon dioxide gel, a nanometer titanium dioxide gel and a nanometer zirconium dioxide gel. The organic solvent can be any one of or a mixture of an ethanol solvent and an isopropanol solvent. The nanometer powder has a 5˜100 nm diameter and can be any one of or a mixture of a nanometer metal powder and a nanometer metal-oxide powder, wherein the nanometer metal powder can be any one of or a mixture of at least two selected from a nanometer platinum powder, a nanometer copper powder and a nanometer nickel powder and so on, the nanometer metal-oxide powder can be any one of or a mixture of at least two selected from a nanometer silicon dioxide powder, a nanometer titanium dioxide powder and a nanometer zirconium dioxide powder and so on. Furthermore, the nanometer powder is processed by a surfactant before being mixed with the nanometer inorganic oxide gel and the organic solvent for improving a corrosion resistance thereof and further improving a corrosion resistance of the nanocomposite coating, wherein the surfactant can be any one of or a mixture of a sodium dodecylsulphonate and a polyvinyl pyrrolidone.
A method of coating for protecting a product with the foregoing nanocomposite coating is mainly adapted to protect the product from being corroded and damaged by some exterior chemicals, such as organic alcohol, organic ketone, acid, alkali and oil etc. The method is described hereinafter.
Firstly, the foregoing nanocomposite coating is prepared.
Next, the nanocomposite coating is coated onto surfaces of the product evenly by way of spraying, dipping or roll-to-rolling
Lastly, the product coated with the nanocomposite coating is subjected to a room temperature or a heating environment lower than 170 degrees centigrade to make the nanocomposite coating dry (namely, evaporated to be a gas phase) for forming nanometer protective films on the surfaces of the product so as to protect the product from being corroded and damaged by the exterior chemicals.
An unlimited embodiment is described as following. In the unlimited embodiment, the product is made of polyurethane plastic and the nanometer powder processed by the surfactant is a nanometer silicon dioxide powder having 2% weight in the nanocomposite coating and a 20 nm diameter. The product is processed by the above-mentioned method for forming nanometer protective films of 50 microns thickness on the surfaces thereof. Next, do a corrosion-resisting test to the product with and without the nanometer protective films thereon respectively. Put the product with and without the nanometer protective films thereon respectively into 100% concentration of propyl alcohol solution, 95# leadless gasoline, engine oil and 6 mol/L of sodium hydroxide solution for being reacted about 12 hours. Experiment results show that, the product with the nanometer protective films thereon is scarcely corroded and damaged, while the product without the nanometer protective films thereon is seriously corroded and damaged in the propyl alcohol solution and is more or less corroded and damaged in another three solutions. Therefore, it is known from the unlimited embodiment that the nanometer protective films formed by the nanocomposite coating can really protect the product from being corroded and damaged by the exterior chemicals well.
As described above, the nanocomposite coating of the present invention can well protect the product from being corroded and damaged by the exterior chemicals by way of forming the nanometer protective films on the surfaces of the product. Furthermore, the nanometer powder processed by the surfactant can further improve the corrosion resistance of the nanometer protective films.
Claims
What is claimed is:1. A method of coating for protecting a product with a nanocomposite coating adapted to protect the product from being corroded and damaged by some exterior chemicals, the method comprising the steps of:
preparing the nanocomposite coating which is formed by mixing a nanometer inorganic oxide gel made by a sol-gel method, an organic solvent and a nanometer powder together;
coating the nanocomposite coating onto surfaces of the product evenly by way of spraying, dipping or roll-to-rolling; and
subjecting the product coated with the nanocomposite coating to a room temperature or a heating environment lower than 170 degrees centigrade to make the nanocomposite coating dry for forming nanometer protective films on the surfaces of the product so as to protect the product from being corroded and damaged by the exterior chemicals;
wherein the weight percentage of the nanometer inorganic oxide gel, the organic solvent and the nanometer powder in the nanocomposite coating is 22.5˜49.5%, 45˜74.25% and 1˜10% respectively.
2. The method as claimed in claim 1, wherein the nanometer powder is any one of or a mixture of a nanometer metal powder and a nanometer metal-oxide powder.
3. The method as claimed in claim 2, wherein the nanometer metal powder is any one of or a mixture of at least two selected from a nanometer platinum powder, a nanometer copper powder and a nanometer nickel powder.
4. The method as claimed in claim 2, wherein the nanometer metal-oxide powder is any one of or a mixture of at least two selected from a nanometer silicon dioxide powder, a nanometer titanium dioxide powder and a nanometer zirconium dioxide powder.
5. The method as claimed in claim 1, wherein the nanometer powder is processed by a surfactant before being mixed with the nanometer inorganic oxide gel and the organic solvent to form the nanocomposite coating.
6. The method as claimed in claim 5, wherein the surfactant is any one of or a mixture of a sodium dodecylsulphonate and a polyvinyl pyrrolidone.
7. The method as claimed in claim 1, wherein the diameter of the nanometer powder is 5˜100 nm.
8. The method as claimed in claim 1, wherein the nanometer inorganic oxide gel is any one of or a mixture of at least two selected from a nanometer silicon dioxide gel, a nanometer titanium dioxide gel and a nanometer zirconium dioxide gel.
9. The method as claimed in claim 1, wherein the organic solvent is any one of or a mixture of an ethanol solvent and an isopropanol solvent.