CN101880499A - Alcohol-soluble electromagnetic wave shielding coating - Google Patents
Alcohol-soluble electromagnetic wave shielding coating Download PDFInfo
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- CN101880499A CN101880499A CN 201010152545 CN201010152545A CN101880499A CN 101880499 A CN101880499 A CN 101880499A CN 201010152545 CN201010152545 CN 201010152545 CN 201010152545 A CN201010152545 A CN 201010152545A CN 101880499 A CN101880499 A CN 101880499A
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Abstract
The invention discloses an alcohol-soluble electromagnetic wave shielding coating, which comprises the following components by weight percentage: 20-50 percent of conductive powder, 25-45 percent of conductive resin, 0.5-2 percent of coupling agent, 2-4 percent of dispersing agent, 0.5-3 percent of alignment agent and 17-50 percent of alcohol solvent. The invention aims to overcome the defects of the domestic electromagnetic wave shielding coating at present, and provides a coating which can shield electromagnetic waves and effectively reduce the electromagnetic radiation pollution.
Description
Technical field
The present invention relates to a kind of alcohol-soluble electromagnetic wave shielding coating.
Background technology
Widespread use along with the development of the market universalness of consumer electronics products such as mobile phone, televisor, video disc player, PC, digital audio-video, electronic game, automotive electronics, microwave oven, digital camera and electronics and information industry and hi-tech, powerful electronic electric equipment has formed the complex electromagnetic environments pollution.And electromagnetic wave outside radiating electromagnetic energy just with the speed increase of annual 7%--14%, pollute serious day by day by electromagnetic environment, and electromagnetic radiation pollution has become the fourth-largest social effects of pollution after topsoil, water pollution, noise pollution.
One of the principal pollutant that must control are listed electromagnetic radiation in United Nations's human environment conference.The high-strength magnetic ripple that electromagnetic radiation had produced when both having comprised operation such as electrical equipment such as television station, substation, hertzian wave launching tower also comprises the electromagnetic radiation that produces when household electrical appliance such as computer, televisor, mobile phone, microwave oven use.These electromagnetic radiation are full of the space, and colorless and odorless is invisible, can penetrate the multiple material that comprises human body.On the other hand, the electronic electric equipment susceptibility increase of electromagnetic environment to external world.Its major cause is, electronic electric equipment since digitizing day by day, Highgrade integration, signal level small quantization to satisfy and the requirement of high speed, lightweight and miniaturization, make it produce flase operation and be subject to outside electromagnetic interference, thereby have serious consequences; In addition, engineering plastics since in light weight, easy to process, with low cost, shape-designing flexibly and the application order in electronic and electrical equipment becomes extensive, but engineering plastics are easy to produce static and stagnant electrical phenomena in electromagnetic field, electromagnetic field is not almost had barrier action, almost is " transparent " to the hertzian wave below the 1GHz especially.
Electromagnetic environment is polluted as the world's one big public hazards, serious harm human beings'health and safety.And the electromagnetic information that causes the thus safety such as harm national politics, economy, military affairs, diplomacy of divulging a secret cause immeasurable loss.Its main harm shows:
1. Electromagnetic Interference endangers electronics.Electromagnetic interference can cause computer network to calculate and error of transmission, the TV images disorder, and phone noise etc., even also can produce serious harm to boat system of army of civil aviaton, traffic system, communication network, electrical means.
2. electromagenetic wave radiation causes information leakage.The hertzian wave that common computer leaks out can be received in certain distance and reappear.Along with constantly popularizing of computer information technology, consequent information leakage brings heavy losses can for national politics, military affairs, economy.
3. hertzian wave pollution threatens human's health.The electromagenetic wave radiation dosage of some area mobile phone can reach 600 microwatts at present, surpasses country's 15 times to the human body radiation safety standards.The resident is under the radio field intensity of 1000V/m throughout the year near TV and the broadcasting station launching tower, substantially exceeds public's level of protection value (10V/m) of regulation in the world.Electromagnetic radiation pollution is also very serious near the city electrician, medical radio-frequency equipment, and what have is above standard surplus in the of 10 times.If the human body long-term exposure is under the radiation dose that surpasses safety, cell will be killed and wounded or kill by big area.Show that according to foreign data electromagnetic radiation has become one of etiology of current harm humans health.Investigation shows that in the above hertzian wave of 2 milligauss magnetic field, the morbidity of crowd's leukemia is 2.93 times in the home, and the muscle tumor morbidity is 3.26 times in the home.Domestic and international most expert thinks that electromagnetic radiation is one of reason that causes leukemia of children, and can bring out human cancer cell's propagation, influence people's reproductive system, cause the children's intelligence incompleteness, influence people's cardiovascular systems, and people's vision system is had detrimentally affect.
Summary of the invention
The objective of the invention is in order to overcome the weak point in the domestic existing electromagnetic wave screen paint technology, a kind of energy shielding electromagnetic wave is provided, can effectively reduce the coating of electromagnetic radiation pollution.
In order to achieve the above object, the present invention adopts following scheme:
A kind of alcohol-soluble electromagnetic wave shielding coating comprises following component by weight percentage:
Conducting powder 20-50% electroconductive resin 25-45%
Coupling agent 0.5-2% dispersion agent 2-4%
Align agent 0.5-3% alcoholic solvent 17-50%.
Aforesaid a kind of alcohol-soluble electromagnetic wave shielding coating, wherein said alcoholic solvent are one or both the mixture in ethanol or the ethylene glycol.
Aforesaid a kind of alcohol-soluble electromagnetic wave shielding coating, wherein said conducting powder are micron order conducting metal powder.
Aforesaid a kind of alcohol-soluble electromagnetic wave shielding coating, wherein said micron order conducting metal powder are a kind of in fine silver powder, silver-coated copper powder or the nickel powder.
Aforesaid a kind of alcohol-soluble electromagnetic wave shielding coating, wherein said to align agent be antimony-tin oxide nano-powder material.
Aforesaid a kind of alcohol-soluble electromagnetic wave shielding coating, wherein said electroconductive resin are one or both the mixture in ethanol-soluble type vinylformic acid electroconductive resin or the ethanol-soluble type epoxy conductive resin.
Aforesaid a kind of alcohol-soluble electromagnetic wave shielding coating, wherein said coupling agent are silane coupling agent.
Aforesaid a kind of alcohol-soluble electromagnetic wave shielding coating, wherein said silane coupling agent are γ-An Bingjisanyiyangjiguiwan.
Aforesaid a kind of alcohol-soluble electromagnetic wave shielding coating, wherein said dispersion agent are the ammonium salt dispersion agent.
Coupling agent specifically is the KH-550 silane coupling agent that Nanjing really chemical industry company limited difficult to understand produces among the present invention: γ-An Bingjisanyiyangjiguiwan, it is a kind of general amino coupling agent, can be water-soluble fully, pure immediately, aromatic series and aliphatic hydrocarbon compound, extensively apply to promote the bonding of inorganic and organic polymer material.Described dispersion agent is the 1124 type ammonium salt dispersion agents that Rhom and Hass produces.Described alcoholic solvent protection ethylene glycol and ethanol (its purity is more than 95%).
Beneficial effect of the present invention:
One, uses antimony-tin oxide nano-powder material among the present invention as aligning agent, it has special photoelectric properties, the purpose that conductive powder body is reached align in the frequency range of 10MHz-1.5GHz, is used electromagnetic wave screen paint shield effectiveness is reached more than the 40-80dB;
When two, coating of the present invention formed the above coating of thickness 25 μ m, its resistivity reached 0.02 Ω cm;
Three, product of the present invention uses alcoholic solvent, has solved the sticking power problem of electromagnetic wave screen paint on plastic rubber substrates such as ABS, PC, HIPS, PS, PP, PBT;
Four, product harmful substance contents of the present invention is few, high-performances such as hardness height, wear resistance is good, the VOC discharging is low, particularly VOC discharging has only international requirement to greatest extent 1/10, the green chemical industry theory that meets low toxicity, environmental protection, cleaner production is for the producer and user have created good working environment.
Embodiment
Below in conjunction with embodiment the present invention is described further:
Embodiment 1
Alcohol-soluble electromagnetic wave shielding coating of the present invention comprises following component by weight percentage:
Silver-coated copper powder 25%
Ethanol-soluble type vinylformic acid electroconductive resin 40%
γ-An Bingjisanyiyangjiguiwan 1.5%
Ammonium salt dispersion agent 4%
Antimony-stannic oxide (ATO) nano-powder material 2%
Ethanol 27.5%.
Adopt dispersion machine with ethanol-soluble type vinylformic acid electroconductive resin high speed dispersion, add ethanol, sneak into the micro nanometer silver copper-clad conductive powder body for preparing equally then, carry out mechanical blending by high speed dispersion, add γ-An Bingjisanyiyangjiguiwan, ammonium salt dispersion agent, antimony-stannic oxide (ATO) nano-powder material then respectively successively, high speed dispersion one hour promptly gets alcohol-soluble electromagnetic wave shielding coating to mixing.
Embodiment 2
Alcohol-soluble electromagnetic wave shielding coating of the present invention comprises following component by weight percentage:
Fine silver powder 30%
Ethanol-soluble type vinylformic acid electroconductive resin 35%
γ-An Bingjisanyiyangjiguiwan 0.5%
Ammonium salt dispersion agent 2%
Antimony-stannic oxide (ATO) nano-powder material 0.5%
Ethanol 32%.
Adopt dispersion machine with ethanol-soluble type vinylformic acid electroconductive resin high speed dispersion, add ethanol, sneak into the micron order fine silver conductive powder body for preparing equally then, carry out mechanical blending by high speed dispersion, add γ-An Bingjisanyiyangjiguiwan, ammonium salt dispersion agent, antimony-stannic oxide (ATO) nano-powder material then respectively successively, high speed dispersion one hour promptly gets alcohol-soluble electromagnetic wave shielding coating to mixing.
Embodiment 3
Alcohol-soluble electromagnetic wave shielding coating of the present invention comprises following component by weight percentage:
Nickel powder 35%
Ethanol-soluble type vinylformic acid electroconductive resin 38%
γ-An Bingjisanyiyangjiguiwan 1.5%
Ammonium salt dispersion agent 3%
Antimony-stannic oxide (ATO) nano-powder material 2.5%
Ethanol 20%.
Adopt dispersion machine with ethanol-soluble type vinylformic acid electroconductive resin high speed dispersion, add ethanol, sneak into the micrometer nickel conductive powder body for preparing equally then, carry out mechanical blending by high speed dispersion, add γ-An Bingjisanyiyangjiguiwan, ammonium salt dispersion agent, antimony-stannic oxide (ATO) nano-powder material then respectively successively, high speed dispersion one hour promptly gets alcohol-soluble electromagnetic wave shielding coating to mixing.
Embodiment 4
Alcohol-soluble electromagnetic wave shielding coating of the present invention comprises following component by weight percentage:
Nickel powder 35%
Ethanol-soluble type vinylformic acid electroconductive resin 38%
γ-An Bingjisanyiyangjiguiwan 1.5%
Ammonium salt dispersion agent 3%
Antimony-stannic oxide (ATO) nano-powder material 2.5%
Ethylene glycol and alcoholic acid mixture 20%.
Adopt dispersion machine with ethanol-soluble type vinylformic acid electroconductive resin high speed dispersion, the mixture that adds ethanol and ethylene glycol, sneak into the micrometer nickel conductive powder body for preparing equally then, carry out mechanical blending by high speed dispersion, add γ-An Bingjisanyiyangjiguiwan, ammonium salt dispersion agent, antimony-stannic oxide (ATO) nano-powder material then respectively successively, high speed dispersion one hour promptly gets alcohol-soluble electromagnetic wave shielding coating to mixing.
In order to verify the excellent properties of product of the present invention, electromagnetic screen coating in the various embodiments of the present invention and domestic other electromagnetic screen coating products contrast, comparative sample 1 is the product of YL5001 for the model that Wuxi Yi Yue company produces, comparative sample 2 is the product of YL5003 for the model that Wuxi Yi Yue company produces, comparative sample 3 is the product of SS_606M for the model that Beijing Na Shengtong company produces, comparative sample 4 is the product of PB151 for the model that Chengdu Hua Yin company produces, comparative sample 5 is the product of PB152 for the model that Chengdu Hua Yin company produces, performance comparison the results are shown in Table 1, and limits of harmful substances detects (quoting the ROHS of European Union instruction) comparing result and sees Table 2 in the product.
Table 1 electromagnetic screen coating of the present invention and domestic other electromagnetic screen coating contrasts
The contrast of table 2 limits of harmful substances
Table 1 and the explanation of table 2 comparing result: high-performances such as the product of various embodiments of the present invention has strong adhesion, shield effectiveness is good, hardness is high, wear resistance is good, the VOC discharging is low, particularly VOC discharging has only international requirement to greatest extent 1/10, the green chemical industry theory that meets low toxicity, environmental protection, cleaner production is for the producer and user have created good working environment.
In order to verify that product of the present invention has good shield effectiveness, the present invention compares product among each embodiment and import like product, wherein Comparative Examples 1 model clear for Japan and that company produces is the product of opalex10, Comparative Examples 2 is the product of IsolexR65 for the model that Korea S BEE company produces, Comparative Examples 3 is the product of EcP502x for the model that TBA company produces, and Comparative Examples 3 is the product of J190 for the model that Trimite Ltd company produces.Comparing result sees Table 3:
The contrast of table 3 electromagnetic screen coating
| Technical indicator | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Comparative Examples 1 | Comparative Examples 2 | Comparative Examples 3 | Comparative Examples 3 |
| Coating system | Ethanol | Ethanol | Ethanol | Ethanol and ethylene glycol | Acetone | Toluene | Ethyl acetate | Dimethylbenzene |
| Conducting powder | The silver copper-clad | The fine silver powder | Nickel | Nickel | Copper (easily oxidation) | Nickel | Nickel | Silver |
| Shield effectiveness (dB | ??75 | ??73 | ??70 | ??80 | ??45 | ??65 | ??68 | ??75 |
| Use cost | Low | Low | Low | Low | Low | Medium | Medium | High |
Usually, specifically being categorized as of shield effectiveness: 0～10dB does not almost have shielding effect; 10～30dB has less shielding effect; 30～60dB is medium shield effectiveness, can be used for general industry or the commercial electronics of using; 60～90dB shield effectiveness is better, can be used for the shielding of aerospace and military equipment equipment; The above shielding material of 90dB then has best shield effectiveness, is applicable to require harsh high precision, high sensitive product.According to using needs, for the shielding material of most of electronic products, in 30～1000MHz range of frequency, its SE will reach 35dB above (corresponding volume specific resistance 0.02 Ω/below the cm) at least, just thinks effective shielding.
Product shield effectiveness of the present invention reaches 70-80dB, reaches 25 μ m when above at coat-thickness, and its electric conductivity of silver-colored electric conduction paint reaches that 0.02 Ω/below the cm, silver-colored copper-clad electric conduction paint electric conductivity reaches 0.2 Ω/cm, and shield effectiveness is very superior.
The solvent that solvent that the present invention selects for use and existing electromagnetic screen coating are used always has carried out a contrast, and comparing result is as follows,
The parameter of table 4 all kinds of SOLVENTS
| Solvent | Surface tension (mN/m) | Solubility parameter (J/m 3) 1/2 | Relative evaporation rate |
| Toluene | ??28.53 | ??18.21 | ??1.95 |
| Dimethylbenzene | ??22.8 | ??19.0 | ??1.38 |
| Acetone | ??23.7 | ??19.7 | ??7.2 |
| Ethyl acetate | ??23.75 | ??18.2 | ??5.25 |
| Ethylene glycol | ??22.27 | ??23.7 | ??0.45 |
| Ethanol | ??22.32 | ??26.5 | ??0.01 |
Table 4 comparing result is as can be seen: the relative evaporation rate of alcoholic solvent series is low, surface tension, solubility parameter and the most frequently used toluene are more approaching, therefore, selects the alcoholic solvent system can reach the requirement of production high-quality electromagnetic screen coating.
In sum, product of the present invention has excellent anti-electro-magnetic screen function, can effectively control electromagenetic wave radiation, reduces dysfunction and pathological lesion that human body is produced, as pathologies such as neurasthenia, oligoleukocythemia; Product of the present invention belongs to the environmentally friendly machine based on the alcohol solvent, and diluted system has also reached environmental requirement; Harmless, and can effectively reduce the discharging of unwanted volatile in the atmosphere; The sticking power of product of the present invention is better than GB/T1720-79 " paint film adhesion assay method " national standard, reaches more than the 1H; Shield effectiveness is: in the frequency range of 10MHz-1.5GHz, the electromagnetic noise decay reaches 40-80dB; Product limits of harmful substances of the present invention meets the RoHS of European Union command request.
Claims (9)
1. alcohol-soluble electromagnetic wave shielding coating is characterized in that comprising by weight percentage following component:
Conducting powder 20-50% electroconductive resin 25-45%
Coupling agent 0.5-2% dispersion agent 2-4%
Align agent 0.5-3% alcoholic solvent 17-50%.
2. a kind of alcohol-soluble electromagnetic wave shielding coating according to claim 1 is characterized in that described alcoholic solvent is one or both the mixture in ethanol or the ethylene glycol.
3. a kind of alcohol-soluble electromagnetic wave shielding coating according to claim 1 is characterized in that described conducting powder is a micron order conducting metal powder.
4. a kind of alcohol-soluble electromagnetic wave shielding coating according to claim 1 is characterized in that described micron order conducting metal powder is a kind of in fine silver powder, silver-colored copper-clad or the nickel.
5. a kind of alcohol-soluble electromagnetic wave shielding coating according to claim 1 is characterized in that described to align agent be antimony-tin oxide nano-powder material.
6. a kind of alcohol-soluble electromagnetic wave shielding coating according to claim 1 is characterized in that described electroconductive resin is one or both the mixture in ethanol-soluble type vinylformic acid electroconductive resin or the ethanol-soluble type epoxy conductive resin.
7. a kind of alcohol-soluble electromagnetic wave shielding coating according to claim 1 is characterized in that described coupling agent is a silane coupling agent.
8. a kind of alcohol-soluble electromagnetic wave shielding coating according to claim 7 is characterized in that described silane coupling agent is a γ-An Bingjisanyiyangjiguiwan.
9. a kind of alcohol-soluble electromagnetic wave shielding coating according to claim 1 is characterized in that described dispersion agent is the ammonium salt dispersion agent.
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| CN 201010152545 CN101880499B (en) | 2010-04-22 | 2010-04-22 | Alcohol-soluble electromagnetic wave shielding coating |
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| CN 201010152545 CN101880499B (en) | 2010-04-22 | 2010-04-22 | Alcohol-soluble electromagnetic wave shielding coating |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102010647A (en) * | 2010-12-08 | 2011-04-13 | 中山火炬职业技术学院 | Electromagnetic wave barrier coating and preparation method thereof |
| CN102086330A (en) * | 2011-01-21 | 2011-06-08 | 中国人民解放军63983部队 | Electro-thermal coating |
| CN102863852A (en) * | 2012-09-03 | 2013-01-09 | 南通博宇机电有限公司 | Antistatic paint |
| CN104988805A (en) * | 2015-06-08 | 2015-10-21 | 东莞市尚鑫纸业有限公司 | Release paper applied to electric field and manufacturing technology thereof |
| CN106519858A (en) * | 2016-11-02 | 2017-03-22 | 美国三和（香港）化工科技集团有限公司 | Spray paint and preparation method thereof |
| CN107236421A (en) * | 2017-07-19 | 2017-10-10 | 清华大学深圳研究生院 | A kind of electromagnetic screen coating |
| CN108285721A (en) * | 2018-02-05 | 2018-07-17 | 武汉市善恩堂科技有限公司 | Resist radiation necklace and preparation method thereof |
| KR20190024414A (en) * | 2017-08-31 | 2019-03-08 | 삼성에스디아이 주식회사 | Conductive composition for electro-magnetic shielding, electro-magnetic shielding layer prepared therefrom and circuit board laminate comprising the same |
| CN109949965A (en) * | 2019-03-12 | 2019-06-28 | 柳州呈奥科技有限公司 | A kind of new A TO nano-powder applied to electrode of solar battery |
| CN110373085A (en) * | 2019-06-12 | 2019-10-25 | 蓝海利 | A kind of surface of steel workpiece Special electromagnetic shielding coating |
| CN110713783A (en) * | 2019-11-11 | 2020-01-21 | 成都普瑞斯特新材料有限公司 | Nano low-frequency electromagnetic shielding coating and preparation method thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102010647A (en) * | 2010-12-08 | 2011-04-13 | 中山火炬职业技术学院 | Electromagnetic wave barrier coating and preparation method thereof |
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| CN107236421B (en) * | 2017-07-19 | 2019-10-15 | 清华大学深圳研究生院 | A kind of electromagnetic screen coating |
| KR20190024414A (en) * | 2017-08-31 | 2019-03-08 | 삼성에스디아이 주식회사 | Conductive composition for electro-magnetic shielding, electro-magnetic shielding layer prepared therefrom and circuit board laminate comprising the same |
| KR102084117B1 (en) * | 2017-08-31 | 2020-03-03 | 삼성에스디아이 주식회사 | Conductive composition for electro-magnetic shielding, electro-magnetic shielding layer prepared therefrom and circuit board laminate comprising the same |
| CN108285721A (en) * | 2018-02-05 | 2018-07-17 | 武汉市善恩堂科技有限公司 | Resist radiation necklace and preparation method thereof |
| CN108285721B (en) * | 2018-02-05 | 2020-07-24 | 武汉市善恩堂科技有限公司 | Radiation-resistant necklace and preparation method thereof |
| CN109949965A (en) * | 2019-03-12 | 2019-06-28 | 柳州呈奥科技有限公司 | A kind of new A TO nano-powder applied to electrode of solar battery |
| CN110373085A (en) * | 2019-06-12 | 2019-10-25 | 蓝海利 | A kind of surface of steel workpiece Special electromagnetic shielding coating |
| CN110713783A (en) * | 2019-11-11 | 2020-01-21 | 成都普瑞斯特新材料有限公司 | Nano low-frequency electromagnetic shielding coating and preparation method thereof |
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Address after: Triangle town gold carp Industrial Zone Guangdong city Zhongshan province Baohua road 528445 No. 8 Patentee after: GUANGDONG DOWAY PAINT TECHNOLOGY Co.,Ltd. Address before: 528445, Guangdong, Zhongshan Province town of golden carp Industrial Park Patentee before: Zhongshan Doway Coatings Co.,Ltd. |
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Granted publication date: 20130508 |
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| CF01 | Termination of patent right due to non-payment of annual fee |