CN1944710A - Nano mirror spray coating - Google Patents
Nano mirror spray coating Download PDFInfo
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- CN1944710A CN1944710A CN 200610140828 CN200610140828A CN1944710A CN 1944710 A CN1944710 A CN 1944710A CN 200610140828 CN200610140828 CN 200610140828 CN 200610140828 A CN200610140828 A CN 200610140828A CN 1944710 A CN1944710 A CN 1944710A
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Abstract
The nanometer mirror spraying process includes the following steps: 1. eliminating surface dust; 2. spraying primer; 3. sensitizing and activating treatment; 4. spraying solution A comprising silver nitrate solution, ammonia water solution and sodium hydroxide solution and solution B comprising sodium borohydride, potassium borohydride or p-methylaminophenol sulfate solution in the volume ratio of 1 to 1-1.7 to produce reduction; 5. shaping and developing; 6. blowing to dry; and 7. drying. The present invention has the advantages of diversified products, high corrosion resistance, suitability to mass production, high hardness, low cost, etc.
Description
Technical field
The present invention relates to a kind of method of utilizing silver mirror reaction spraying article, especially relate to nano mirror spray coating.
Background technology
Along with growth in the living standard, people have had more and more higher requirement to the outside surface glossiness of article.Recently, proposed to utilize the method for silver mirror reaction spraying article, this method can significantly improve the glossiness of article surface; This method is that the basic solution that will contain metal sprays to the article surface that resin is made, on this surface, spray the aqueous solution that contains metal ions such as silver ions and the aqueous solution that contains reductive agent simultaneously, utilize silver mirror reaction to make the metal ion reduction and precipitating metal, remove remaining component in the washing of pure water kind then, spray specific fixing agents such as sodium sulphite anhydrous 99.3, carry out clear-coated then; Wherein, the aqueous solution that contains metal ion is that concentration is 0.5～1.5% ammonia silver nitrate aqueous solution.
In addition, have now by spraying and contain the method that precious metal salts such as tin chloride and palladium carry out activation treatment, and the method that will utilize spraying method to form silver-colored face respectively by the silver mirror reaction treatment agent that solution that contains metal-salt and the solution that contains reductive agent constitute has also occurred with spraying method; Its elementary operation is as follows: add the solution that aqueous sodium hydroxide solution is configured to contain the metal-salt of predetermined concentration ammonia being added the formed solution kind of silver nitrate aqueous solution kind, then, add formaldehyde solution and be configured to reductant solution in the aqueous solution of tartrate and glucose, these two kinds of solution spray simultaneously by double head spray gun or two spray guns etc. and use.
But there is following defective in existing technology: 1) She Ji simplification, and pattern is single; 2) erosion resistance of existing spraying minute surface, hardness all have disappearance to a certain degree; 3) owing to the weak property reductive agent that mostly is that uses in the spraying process, the reaction times is grown (2～3 minutes), so have to lose a large amount of raw materials, causes the waste of raw material and the raising of cost, and production rate is slower, and industrialization is difficult to!
Summary of the invention
The technical problem to be solved in the present invention provides a kind of nano mirror spray coating, the product design variation that this method is made, can satisfy various different clients to designing requirement, the minute surface that this product forms can reach nano level, its erosion resistance and hardness are greatly improved, time with silver mirror reaction shortened within 10 seconds simultaneously, had reduced the waste of raw material greatly and had reduced cost.
For solving the problems of the technologies described above, the step of nano mirror spray coating of the present invention is as follows:
1) dust of removing article surface;
2) spraying prime coat: on the article surface after the dedusting, spray the prime coat of 10～30 micron thickness, drying with spray gun; This prime coat is the mixture of Resins, epoxy, fluorine charcoal resin or Resins, epoxy and fluorine charcoal resin;
3) sensitization, activation treatment: spraying the surface sensitizing activation solution with the article surface of spraying prime coat with atomizer, till article surface is all moistening, washing article with pure water solution then; Contain tin chloride 15～25 grams per liters in the described surface sensitizing activation solution, contain Palladous chloride 5～15 grams per liters, hydrogenchloride 65～75 grams per liters; The resistivity of described pure water solution is greater than 10 Ω cm.
4) spray gun spraying reduction reaction: spray A agent and B agent with double head spray gun or two spray guns simultaneously to sensitization and activatory article surface, form the argent coating, this argent coat-thickness is between 0.1 micron～0.3 micron;
Described A agent: the volume ratio of B agent is 1: 1～1.7, and the mixing point of described A agent, B agent sprays the distance of article between 15～25cm from quilt;
Described A agent is a silver ammino solution, this silver ammino solution is to be mixed by silver nitrate solution, ammonia soln and sodium hydroxide solution, wherein the volume ratio of ammonia soln and sodium hydroxide solution is 1: 1, and the silver ions concentration expressed in percentage by weight accounts for 0.5～1.5% in silver ammino solution;
Described B agent is that sodium borohydride, POTASSIUM BOROHYDRIDE or sulfuric acid are to the methylamino phenol solution;
5) setting is developed: with the metallic coating surface ejection sodium sulphite anhydrous 99.3 solution of spray gun to article, with the stable metal coating, strengthen the antioxidant property of protection metallic coating;
6) dry up: blow to the silver mirror surface with air blowing rifle, dry up the ponding on silver mirror surface;
7) drying: drying is 30～40 minutes in 55～65 ℃ drying oven, strengthens the sticking power of silver mirror coating layer.
The present invention compared with prior art has following advantage:
1) in the spraying prime coat, used raw material fluorine charcoal resin.Fluorine charcoal resin is highly resistant to the erosion of acid rain, atmospheric pollution and UV-light, and it is long to have duration of service, and adsorptive power is strong, and glossiness is good, ageing-resistant, the characteristics of nondiscoloration; Since fluorine charcoal resin coating surface for inferior light (glossiness is about 35) so light can form diffuse-reflectance, can not cause light pollution; Because specific molecule structure in the surperficial fluorine charcoal resin coating can not adsorb on it dust, so extremely strong self-cleaning ability is arranged at all.
2) form in the reduction process of silver specular at double head spray gun or two spray gun sprayings, used sodium borohydride as strong reductant.This is the important breakthrough of silver mirror reaction, the reductive agent that general silver mirror uses is an aldehyde compound, further used carbohydrates such as glucose, fructose afterwards, but, these reductive agents in spraying process, the reaction times generally between 2～3 minutes, so, have a large amount of spraying raw material to run off in the spraying process, the loss ratio reaches 90%～97%.Sodium borohydride is a white crystalline powder.Relative density 1.074.When 400 ℃ in vacuum, decompose; Water absorbability is arranged, stable in dry air, in wet air, decompose; Water-soluble, liquefied ammonia, amine are slightly soluble in tetrahydrofuran (THF), are insoluble to ether, benzene, hydrocarbon; Produce hydrogen with the water effect; The sodium borohydride basic solution is pale brown look; It is a kind of strong reductant.After using sodium borohydride or the reductive agent of POTASSIUM BOROHYDRIDE as silver mirror reaction, the reaction times has reduced the loss of spraying silver mirror coating layer raw material greatly within 10 seconds.The price amount of increase of the silver on the market is very big now, even the reduction greatly of the minimizing cost of significant loss is applicable to suitability for industrialized production in batches again! Use method of the present invention, cost can reduce by 2～4 times.
3) utilize sodium sulphite anhydrous 99.3 as the setting photographic developer, strengthened the lasting glossiness on silver mirror surface, also strengthened scale resistance.
Embodiment
Embodiment 1
The step of nano mirror spray coating of the present invention is as follows:
1) dust of removing article surface;
2) spraying prime coat: on the article surface after the dedusting, spray the prime coat of 10 micron thickness, drying with spray gun; This prime coat is a Resins, epoxy;
3) sensitization, activation treatment: spraying surface sensitizing, activation solution with the article surface of spraying prime coat with atomizer, till article surface is all moistening, washing article with pure water solution then; Contain tin chloride 15 grams per liters in the described surface sensitizing activation solution, contain Palladous chloride 5 grams per liters, hydrogenchloride 65 grams per liters; The resistivity of described pure water solution is greater than 10 Ω cm;
4) spray gun spraying reduction reaction: spray A agent and B agent with double head spray gun or two spray guns simultaneously to sensitization and activatory article surface, form the argent coating, this argent coat-thickness is 0.1 micron;
Described A agent: the volume ratio of B agent is 1: 1, and the mixing point of described A agent, B agent is 15cm from the distance that is sprayed article;
Described A agent is a silver ammino solution, and this silver ammino solution is to be mixed by silver nitrate solution, ammonia soln and sodium hydroxide solution, and wherein the volume ratio of ammonia soln and sodium hydroxide solution is 1: 1, and the silver ions concentration expressed in percentage by weight accounts for 0.5% in silver ammino solution;
Described B agent is a sodium borohydride solution;
5) setting is developed: with the metallic coating surface ejection sodium sulphite anhydrous 99.3 solution of spray gun to article, with stable protection metallic coating, the antioxidant property of reinforcement metal coating;
6) dry up: blow to the silver mirror surface with air blowing rifle, dry up the ponding on silver mirror surface;
7) drying: drying is 30 minutes in 55 ℃ drying oven, strengthens the sticking power of silver mirror coating layer.
Embodiment 2
The step of nano mirror spray coating of the present invention is as follows:
1) dust of removing article surface;
2) spraying prime coat: on the article surface after the dedusting, spray the prime coat of 30 micron thickness, drying with spray gun; This prime coat fluorine charcoal resin;
3) sensitization, activation treatment: spraying the surface sensitizing activation solution with the article surface of spraying prime coat with atomizer, till article surface is all moistening, washing article with pure water solution then; Contain tin chloride 25 grams per liters in the described surface sensitizing activation solution, contain Palladous chloride 15 grams per liters, hydrogenchloride 75 grams per liters; The resistivity of described pure water solution is greater than 10 Ω cm;
4) spray gun spraying reduction reaction: spray A agent and B agent with double head spray gun or two spray guns simultaneously to sensitization and activatory article surface, form the argent coating, this argent coat-thickness is 0.3 micron;
Described A agent: the volume ratio of B agent is 1: 1.7, and the mixing point of described A agent, B agent is 25cm from the distance that is sprayed article;
Described A agent is a silver ammino solution, and this silver ammino solution is to be mixed by silver nitrate solution, ammonia soln and sodium hydroxide solution, and wherein the volume ratio of ammonia soln and sodium hydroxide solution is 1: 1, and the silver ions concentration expressed in percentage by weight accounts for 1.5% in silver ammino solution;
Described B agent is a solution of potassium borohydride;
5) setting is developed: with the metallic coating surface ejection sodium sulphite anhydrous 99.3 solution of spray gun to article, with stable protection metallic coating, the antioxidant property of reinforcement metal coating;
6) blow in: blow to the silver mirror surface with air blowing rifle, dry up the ponding on silver mirror surface;
7) drying: drying is 40 minutes in 65 ℃ drying oven, strengthens the sticking power of silver mirror coating layer.
Embodiment 3
The step of nano mirror spray coating of the present invention is as follows:
1) dust of removing article surface;
2) spraying prime coat: on the article surface after the dedusting, spray the prime coat of 20 micron thickness, drying with spray gun; This prime coat is the mixture of Resins, epoxy and fluorine charcoal resin;
3) sensitization, activation treatment: spraying the surface sensitizing activation solution with the article surface of spraying prime coat with atomizer, till article surface is all moistening, washing article with pure water solution then; Contain tin chloride 20 grams per liters in the described surface sensitizing activation solution, contain Palladous chloride 10 grams per liters, hydrogenchloride 70 grams per liters; The resistivity of described pure water solution is greater than 10 Ω cm;
4) spray gun spraying reduction reaction: spray A agent and B agent with double head spray gun or two spray guns simultaneously to sensitization and activatory article surface, form the argent coating, this argent coat-thickness is 0.2 micron;
Described A agent: the volume ratio of B agent is 1: 1.3, and the mixing point of described A agent, B agent is 20cm from the distance that is sprayed article;
Described A agent is a silver ammino solution, and this silver ammino solution is to be mixed by silver nitrate solution, ammonia soln and sodium hydroxide solution, and wherein the volume ratio of ammonia soln and sodium hydroxide solution is 1: 1, and the silver ions concentration expressed in percentage by weight accounts for 1.0% in silver ammino solution;
Described B agent is that sulfuric acid is to the methylamino phenol solution;
5) setting is developed: with the metallic coating surface ejection sodium sulphite anhydrous 99.3 solution of spray gun to article, with stable protection metallic coating, the antioxidant property of reinforcement metal coating;
6) dry up: blow to the silver mirror surface with air blowing rifle, dry up the ponding on silver mirror surface;
7) drying: drying is 35 minutes in 60 ℃ drying oven, strengthens the sticking power of silver mirror coating layer.
Claims (1)
1, nano mirror spray coating is characterized in that comprising the following steps:
1) dust of removing article surface;
2) spraying prime coat: on the article surface after the dedusting, spray the prime coat of 10～30 micron thickness, drying with spray gun; This prime coat is the mixture of Resins, epoxy, fluorine charcoal resin or Resins, epoxy and fluorine charcoal resin;
3) sensitization, activation treatment: spraying the surface sensitizing activation solution with the article surface of spraying prime coat with atomizer, till article surface is all moistening, washing article with pure water solution then; Contain tin chloride 15～25 grams per liters in the described surface sensitizing activation solution, contain Palladous chloride 5～15 grams per liters, hydrogenchloride 65～75 grams per liters; The resistivity of described pure water solution is greater than 10 Ω cm.
4) spray gun spraying reduction reaction: spray A agent and B agent with double head spray gun or two spray guns simultaneously to sensitization and activatory article surface, form the argent coating, this argent coat-thickness is between 0.1 micron～0.3 micron;
Described A agent: the volume ratio of B agent is 1: 1～1.7, and the mixing point of described A agent, B agent sprays the distance of article between 15～25cm from quilt;
Described A agent is a silver ammino solution, this silver ammino solution is to be mixed by silver nitrate solution, ammonia soln and sodium hydroxide solution, wherein the volume ratio of ammonia soln and sodium hydroxide solution is 1: 1, and the silver ions concentration expressed in percentage by weight accounts for 0.5～1.5% in silver ammino solution;
Described B agent is that sodium borohydride, POTASSIUM BOROHYDRIDE or sulfuric acid are to the methylamino phenol solution;
5) setting is developed: with the metallic coating surface ejection sodium sulphite anhydrous 99.3 solution of spray gun to article, with the stable metal coating, strengthen the antioxidant property of protection metallic coating;
6) dry up: blow to the silver mirror surface with air blowing rifle, dry up the ponding on silver mirror surface;
7) drying: drying is 30～40 minutes in 55～65 ℃ drying oven, strengthens the sticking power of silver mirror coating layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101408282A CN100494489C (en) | 2006-10-11 | 2006-10-11 | Nano mirror spray coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101408282A CN100494489C (en) | 2006-10-11 | 2006-10-11 | Nano mirror spray coating |
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| CN1944710A true CN1944710A (en) | 2007-04-11 |
| CN100494489C CN100494489C (en) | 2009-06-03 |
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| CNB2006101408282A Expired - Fee Related CN100494489C (en) | 2006-10-11 | 2006-10-11 | Nano mirror spray coating |
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| CN101240142B (en) * | 2008-01-24 | 2010-12-08 | 东莞市诺奇纳米科技有限公司 | Special-purpose dope for mirror surface spraying and its preparation method and application |
| CN101922003A (en) * | 2010-07-28 | 2010-12-22 | 宁波艾尚环保科技股份有限公司 | Method for preparing silver mirror coating layer |
| CN101717928B (en) * | 2008-10-09 | 2011-05-18 | 北京有色金属研究总院 | Method for preparing compound powder used for abrasion-resistant self-lubricating coating |
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