CN1709989A - Composite electromagnetic wave shielded coating and its preparing method - Google Patents
Composite electromagnetic wave shielded coating and its preparing method Download PDFInfo
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- CN1709989A CN1709989A CN 200510050031 CN200510050031A CN1709989A CN 1709989 A CN1709989 A CN 1709989A CN 200510050031 CN200510050031 CN 200510050031 CN 200510050031 A CN200510050031 A CN 200510050031A CN 1709989 A CN1709989 A CN 1709989A
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- coupling agent
- electromagnetic wave
- ferromagnetic material
- nickel powder
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Abstract
The invention discloses a kind of new-style compounded electromagnetic wave shielding dope and its producing method. Its components include: membrane forming resin, conduct electric padding, coupling agent and dispersing agent; its characteristic is that the electric padding is micron bromine powder and ferric ferromagnetic substances 6.5 - 15.2%, membrane forming resin 29.9 - 39.5%, coupling agent 0.6 - 1.3%, and dispersing agent 0.6 - 1.3%. The preparation technical process includes preparation of coupling agent solution, the surface coupling process of bromine powder and ferric ferromagnetic substances, and the preparation of dope. The coat formed by the dope has good electromagnetic wave shielding efficiency and can effectively avoid the secondary pollution of electromagnetic wave.
Description
Technical field
The invention belongs to the electromagnetic wave screen paint field, be specifically related to a kind of new type compound electromagnetic wave screen paint that is added with the novel conductive filler and preparation method thereof.
Background technology
At present, the development of electromagnetic shielding material more and more is subject to people's attention with exploitation, discloses " raw mix of electromagnetic wave screen paint and preparation method thereof ", Chinese patent ZL 97107515 as Chinese patent ZL97107514 and discloses " raw mix of electromagnetic wave screen paint and preparation method thereof " etc.Usually, electromagnetic wave screen paint mainly is made up of film-forming resin and conductive filler material, and wherein conductive filler material is the key factor of decision coating effectiveness quality.About conductive filler material, the micron order nickel powder is generally selected for use with its good combination property and low price, but its electromagnet shield effect is lower, and can not realize shielding in wide frequency range, it mainly is to realize by reflection for shielding electromagnetic waves in addition, forms electromagnetic secondary pollution easily.
Summary of the invention
Technical problem underlying to be solved by this invention is to be at the prior art present situation, a kind of new type compound electromagnetic wave screen paint and preparation method thereof is provided, mainly be in the coating preparation process, to introduce absorbing property to contain ferromagnetic material preferably, increase the capability of electromagnetic shielding of coating on the one hand, reduce reflection loss on the other hand, can effectively avoid second environmental pollution.
For solving the problems of the technologies described above, the present invention adopts following technical proposals:
According to the electromagnetic wave shielding theory, replace single nickel powder as conductive filler material with micron order nickel powder and the mixture that contains ferromagnetic material.Electromagnetic screen coating provided by the invention, its component comprise film-forming resin, micron order nickel powder, contain ferromagnetic material, coupling agent and dispersion agent, and the weight percentage of each component is:
Micron order nickel powder 45.6～60.7%
Contain ferromagnetic material 6.5～1 5.2%
Film-forming resin 29.9～39.5%
Coupling agent 0.6～1.3%
Dispersion agent 0.6～1.3%.
Contain ferromagnetic material and be at least a kind of in Z 250, the carbonyl iron dust, particle diameter is a micron order.Micron order nickel powder and the total content that contains ferromagnetic material should be controlled between 58～70%, surpass this content and then can cause the mechanical property of coating to descend, and coating easily produces cracking, come off etc.; Be lower than this content and then do not reach desired shielding properties.The very few nickel powder that can not make of coupling agent and dispersion dosage fully disperses in system, measures the shielding properties that can make coating at most and descends.
Preparation technology's flow process of above-mentioned coating is as follows:
1, proportioning
Micron order nickel powder 45.6～60.7%
Contain ferromagnetic material 6.5～15.2%
Filmogen 29.9～39.5%
Coupling agent 0.6～1.3%
Dispersion agent 0.6～1.3%
2, the preparation of coupling agent solution
Coupling agent solution is formed through solvent cut by coupling agent, and preparation is carried out at normal temperatures, stirs to get final product; The proportioning of coupling agent and solvent is: coupling agent: solvent=1.7%～4.8%: 95.2%～98.3%;
Coupling agent can be selected a kind of in titanic acid ester, the silane coupling agent for use: solvent can be selected a kind of in ethyl acetate, methyl acetate, butylacetate, acetone, methylethylketone, the ethanol at least for use.
3, nickel powder and contain the surface treatment of ferromagnetic material
With the micron order nickel powder with contain ferromagnetic material and put into the coupling agent solution that is added with dispersion agent and stirred, disperse, filter then, dry at normal temperatures.The optimum temps of oven dry is 60～80 ℃.
4, coating preparation
The coating preparation is carried out at normal temperatures.The raw material of coating preparation is a film-forming resin, the micron order nickel powder after surface treatment, contain ferromagnetic material and solvent.These raw materials are mixed, fully disperse, add thinner at last and regulate viscosity, promptly make coating.
Film-forming resin is selected a kind of in Resins, epoxy, urethane, Synolac, resol, the acrylic resin for use; Solvent is selected a kind of in toluene, dimethylbenzene, acetone, ethanol, methyl acetate, butylacetate, the methylethylketone at least for use; Dispersion agent is selected a kind of in organobentonite and the silicon-dioxide at least for use.
With the coating of method for preparing, adopt conventional cold spray apparatus spraying during use or adopt brushing, at room temperature dry and curing.
The present invention has the following advantages:
1, the coating that is provided has good absorption in the wideband zone to hertzian wave.
2, compare with the coating that is conductive filler material with single micron order nickel powder, absorption of electromagnetic wave is increased, can effectively avoid the secondary hertzian wave of environment is polluted.
3, dry and curing is at room temperature carried out, and save energy is easy to use.
4, simple, the easy handling of the preparation method of coating, use conventional equipment fully, the cost performance height is convenient to promote.
Embodiment
Below in conjunction with embodiment the present invention is described in further detail.
Embodiment 1:
The technical process and the processing parameter of present embodiment are as follows:
1, batching
Micron order nickel powder 46.1%
Contain ferromagnetic material 13.2%
Filmogen 39.5%
Coupling agent 0.6%
Dispersion agent 0.6%
2, the preparation of coupling agent solution
Coupling agent is selected titanic acid ester for use, and solvent is selected ethyl acetate for use, and the proportioning of titanic acid ester and ethyl acetate is: titanic acid ester: ethyl acetate=3.8%: 96.2%, during preparation they are mixed at normal temperatures, and stir.
3, micron order nickel powder and contain the surface treatment of ferromagnetic material
With particle diameter is that 2 microns nickel powder and carbonyl iron dust put into the coupling agent solution for preparing, and with ball mill grinding 10 minutes, removes unnecessary solvent then, 60 ℃ of oven dry down.
4, the preparation of coating
The coating preparation is carried out at normal temperatures.Film-forming resin is selected acrylic resin for use; Solvent is selected ethyl acetate for use; Coupling agent is selected titanic acid ester for use; Dispersion agent is selected organobentonite for use.
At first, add the thinner ethyl acetate at last, regulate viscosity and can make finished product coating surface treated nickel powder and carbonyl iron dust and the acrylic resin that is added with dispersion agent ball milling 15 minutes in ball mill.Through the computational analysis of respective volume resistivity and shielding properties, in 1MHz～1000MHz scope, capability of electromagnetic shielding can reach 38～62dB when coat-thickness 200 μ m.
Embodiment 2:
The technical process and the processing parameter of present embodiment are as follows:
1, batching
Micron order nickel powder 52.8%
Contain ferromagnetic material 10.6%
Filmogen 35.2%
Coupling agent 0.7%
Dispersion agent 0.7%
2, the preparation of coupling agent solution
Coupling agent is selected titanic acid ester for use, and solvent is selected ethyl acetate for use, and the proportioning of titanic acid ester and ethyl acetate is: titanic acid ester: ethyl acetate=3.8%: 96.2%, they are mixed at normal temperatures, and stir.
3, micron order nickel powder and contain the surface treatment of ferromagnetic material
With particle diameter is that 2 microns nickel powder and carbonyl iron dust put into the coupling agent solution for preparing, and with ball mill grinding agent in 10 minutes, removes unnecessary solvent then, 60 ℃ of oven dry down.
4, the preparation of coating
The coating preparation is carried out at normal temperatures.Film-forming resin is selected acrylic resin for use; Solvent is selected ethyl acetate for use; Coupling agent is selected titanic acid ester for use; Dispersion agent is selected organobentonite for use.
At first, add the thinner ethyl acetate at last, regulate viscosity and can make finished product coating surface treated nickel powder and carbonyl iron dust and the acrylic resin that is added with dispersion agent ball milling 15 minutes in ball mill.Through the computational analysis of respective volume resistivity and shielding properties, in 1MHz～1000MHz scope, capability of electromagnetic shielding can reach 38～62dB when coat-thickness 200 μ m.
Embodiment 3:
The technical process and the processing parameter of present embodiment are as follows:
1, batching
Micron order nickel powder 60.6%
Contain ferromagnetic material 7.6%
Filmogen 30.3%
Coupling agent 0.75%
Dispersion agent 0.75%
2, the preparation of coupling agent solution
Coupling agent is selected titanic acid ester for use, and solvent is selected ethyl acetate for use, and the proportioning of titanic acid ester and ethyl acetate is: titanic acid ester: ethyl acetate=3.8%: 96.2%, during preparation they are mixed at normal temperatures, and stir.
3, the surface treatment of micron order nickel powder and ferromagnetic material
With particle diameter is that 2 microns nickel powder and carbonyl iron dust put into the coupling agent solution for preparing, and with ball mill grinding agent in 10 minutes, removes unnecessary solvent then, 60 ℃ of oven dry down.
4, the preparation of coating
The coating preparation is carried out at normal temperatures.Film-forming resin is selected acrylic resin for use; Solvent is selected ethyl acetate for use; Coupling agent is selected titanic acid ester for use; Dispersion agent is selected organobentonite for use.
At first, can reach the dispersive requirement, add the thinner ethyl acetate at last, regulate viscosity and can make finished product coating surface treated nickel powder and carbonyl iron dust and the acrylic resin that is added with dispersion agent ball milling 15 minutes in ball mill.Through the computational analysis of respective volume resistivity and shielding properties, in 1MHz～1000MHz scope, capability of electromagnetic shielding can reach 38～62dB when coat-thickness 200 μ m.
Embodiment 4:
The technical process and the processing parameter of present embodiment are as follows:
1, batching
Micron order nickel powder 45.6%
Contain ferromagnetic material 15.2%
Filmogen 36.9%
Coupling agent 1.0%
Dispersion agent 1.3%
2, the preparation of coupling agent solution
Coupling agent is selected titanic acid ester for use, and solvent is selected ethyl acetate for use, and the proportioning of titanic acid ester and ethyl acetate is: titanic acid ester: ethyl acetate=3.8%: 96.2%, during preparation they are mixed at normal temperatures, and stir.
3, the surface treatment of micron order nickel powder and ferromagnetic material
With particle diameter is that 2 microns nickel powder and carbonyl iron dust put into the coupling agent solution for preparing, and with ball mill grinding agent in 10 minutes, removes unnecessary solvent then, 60 ℃ of oven dry down.
4, the preparation of coating
The coating preparation is carried out at normal temperatures.Film-forming resin is selected acrylic resin for use; Solvent is selected methyl acetate for use; Coupling agent is selected titanic acid ester for use; Dispersion agent is selected organobentonite for use.
At first, can reach the dispersive requirement, add the thinner ethyl acetate at last, regulate viscosity and can make finished product coating surface treated nickel powder and carbonyl iron dust and the acrylic resin that is added with dispersion agent ball milling 15 minutes in ball mill.Through the analytical test of respective volume resistivity and shielding properties, in 1MHz～1000MHz scope, capability of electromagnetic shielding can reach 38～62dB when coat-thickness 200 μ m.
Embodiment 5:
The technical process and the processing parameter of present embodiment are as follows:
1, batching
Micron order nickel powder 60.7%
Contain ferromagnetic material 6.5%
Filmogen 31.5%
Coupling agent 1.3%
Dispersion agent 1.0%
2, the preparation of coupling agent solution
Coupling agent is selected titanic acid ester for use, and solvent is selected ethyl acetate for use, and the proportioning of titanic acid ester and ethyl acetate is: titanic acid ester: ethyl acetate=3.8%: 96.2%, during preparation they are mixed at normal temperatures, and stir.
3, the surface treatment of micron order nickel powder and ferromagnetic material
With particle diameter is that 2 microns nickel powder and carbonyl iron dust put into the coupling agent solution for preparing, and with ball mill grinding agent in 10 minutes, removes unnecessary solvent then, 60 ℃ of oven dry down.
4, the preparation of coating
The coating preparation is carried out at normal temperatures.Film-forming resin is selected acrylic resin for use; Solvent is selected methyl acetate for use; Coupling agent is selected titanic acid ester for use; Dispersion agent is selected organobentonite for use.
At first, can reach the dispersive requirement, add the thinner ethyl acetate at last, regulate viscosity and can make finished product coating surface treated nickel powder and carbonyl iron dust and the acrylic resin that is added with dispersion agent ball milling 15 minutes in ball mill.Through the analytical test of respective volume resistivity and shielding properties, in 1MHz～1000MHz scope, capability of electromagnetic shielding can reach 38～62dB when coat-thickness 200 μ m.
Claims (8)
1, a kind of new type compound electromagnetic wave screen paint, its component comprises film-forming resin, conductive filler material, coupling agent and dispersion agent, it is characterized in that conductive filler material is micron order nickel powder and the mixing that contains ferromagnetic material, and the weight percentage of each component is:
Micron order nickel powder 45.6～60.7%
Contain ferromagnetic material 6.5～15.2%
Film-forming resin 29.9～39.5%
Coupling agent 0.6～1.3%
Dispersion agent 0.6～1.3%.
2, electromagnetic wave screen paint according to claim 1 is characterized in that described micron order nickel powder and the total content that contains ferromagnetic material are 58～70wt%.
3, electromagnetic wave screen paint according to claim 1 and 2 is characterized in that the described ferromagnetic material that contains is a carbonyl iron dust.
4, electromagnetic wave screen paint according to claim 3 is characterized in that the described particle diameter that contains ferromagnetic material is a micron order.
5, electromagnetic wave screen paint according to claim 3 is characterized in that described coupling agent is a titanate coupling agent.
6, electromagnetic wave screen paint according to claim 3 is characterized in that described dispersion agent is an organobentonite.
7, a kind of method for preparing electromagnetic wave screen paint as claimed in claim 1 is characterized in that technical process may further comprise the steps:
(1) forms batching according to coating;
(2) preparation coupling agent solution:
Coupling agent solution is formed through solvent cut by coupling agent, and preparation is carried out at normal temperatures, stirs to get final product; The proportioning of coupling agent and solvent is: coupling agent: solvent=1.7%～4.8%: 95.2%～98.3%; Solvent is selected at least a in ethyl acetate, methyl acetate, butylacetate, acetone, methylethylketone, the ethanol for use;
(3) micron order nickel powder and the surface treatment that contains ferromagnetic material
With the micron order nickel powder with contain ferromagnetic material and put into coupling agent solution ball milling, the dispersion that is added with dispersion agent, filter then, dry at normal temperatures;
(4) coating preparation
Coating preparation is carried out at normal temperatures, with film-forming resin, after surface treatment the micron order nickel powder and contain ferromagnetic material, solvent, fully disperse, add thinner at last and regulate viscosity, promptly make coating.
8, preparation method according to claim 7, when it is characterized in that described micron order nickel powder and containing the ferromagnetic material surface treatment, the temperature of oven dry is 60～80 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100500319A CN1328330C (en) | 2005-06-10 | 2005-06-10 | Composite electromagnetic wave shielded coating and its preparing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100500319A CN1328330C (en) | 2005-06-10 | 2005-06-10 | Composite electromagnetic wave shielded coating and its preparing method |
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| CN1709989A true CN1709989A (en) | 2005-12-21 |
| CN1328330C CN1328330C (en) | 2007-07-25 |
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| CN101045845B (en) * | 2007-04-05 | 2010-06-02 | 电子科技大学 | Electromagnetic wave screen paint and preparation method thereof |
| CN102086338A (en) * | 2010-12-22 | 2011-06-08 | 浙江工业大学 | Vinyl ester resin carbon series conductive paint with high corrosion resistance and heat resistance and preparation method thereof |
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| CN101638549B (en) * | 2009-09-09 | 2012-09-05 | 中国电力科学研究院 | Anti-freezing heating functional coating for transmission line conductor |
| CN102086338A (en) * | 2010-12-22 | 2011-06-08 | 浙江工业大学 | Vinyl ester resin carbon series conductive paint with high corrosion resistance and heat resistance and preparation method thereof |
| CN102086338B (en) * | 2010-12-22 | 2012-12-12 | 浙江工业大学 | Vinyl ester resin carbon series conductive paint with high corrosion resistance and heat resistance and preparation method thereof |
| CN103666191B (en) * | 2012-09-14 | 2016-05-04 | 美的集团股份有限公司 | Internal partition and the micro-wave oven of antiradar coatings and preparation method thereof, micro-wave oven for micro-wave oven internal partition |
| CN103666191A (en) * | 2012-09-14 | 2014-03-26 | 美的集团股份有限公司 | Wave absorption coating for internal partition plate of microwave oven, preparation method thereof, internal partition plate of microwave oven and microwave oven |
| CN105331264A (en) * | 2014-08-15 | 2016-02-17 | 中国科学院城市环境研究所 | Composite electromagnetic shielding paint based on nano carbon material |
| CN105713463A (en) * | 2014-12-05 | 2016-06-29 | 中国石油天然气股份有限公司 | Electromagnetic wave shielding coating and preparation method thereof |
| CN107760149A (en) * | 2016-08-23 | 2018-03-06 | 洛阳尖端技术研究院 | A kind of antiradar coatings and preparation method thereof |
| CN106864179A (en) * | 2017-03-14 | 2017-06-20 | 上海源紊新能源科技有限公司 | A kind of automobile active safety device with electromagnetic shielding effect |
| CN107474647A (en) * | 2017-08-10 | 2017-12-15 | 炫杰复合材料（上海）有限公司 | A kind of biological magnetic nano paint and preparation method thereof |
| CN107474647B (en) * | 2017-08-10 | 2019-07-26 | 炫杰复合材料（上海）有限公司 | A kind of biology magnetic nano paint and preparation method thereof |
| CN108395807A (en) * | 2018-03-06 | 2018-08-14 | 成都理工大学 | A kind of anti-electromagnetic radiation anti-contamination function coating and preparation method thereof |
| CN109370341A (en) * | 2018-11-20 | 2019-02-22 | 南通蛇类治疗研究所 | Anti electromagnetic wave nano shielding coating |
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