CN102653659B - Conductive coating material based on polyurethane dispersion body - Google Patents
Conductive coating material based on polyurethane dispersion body Download PDFInfo
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- CN102653659B CN102653659B CN201210125686.8A CN201210125686A CN102653659B CN 102653659 B CN102653659 B CN 102653659B CN 201210125686 A CN201210125686 A CN 201210125686A CN 102653659 B CN102653659 B CN 102653659B
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- polyurethane dispersion
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Abstract
The invention discloses a conductive coating material based on a polyurethane dispersion body. The conductive coating material consists of sheet metal powder and a carrier solvent with the viscosity of 8000+/-1000cps, wherein the carrier solvent consists of the polyurethane dispersion body, ethanol, isopropanol, acetic ether, butanol, deionized water, an aqueous cross-linking agent, triethylamine, N-methyl pyrrolidone and a thickening agent; the polyurethane dispersion body is aqueous polyurethane dispersion or aliphatic anion polyurethane dispersion; when the polyurethane dispersion body is the aqueous polyurethane dispersion, the thickening agent is one or a mixture of polyether-urethane, hydroxyethylcellulose and hydroxy propyl cellulose; and when the polyurethane dispersion body is the aliphatic anion polyurethane dispersion, the thickening agent is one or a mixture of polyacrylic acid, formaldehyde acrylate and ether crosslinking crylic acid. The polyurethane dispersion body-based conductive coating material can be used for effectively preventing metal power from being positioned in the carrier, so that a compact metal layer can be formed on the surface, the use level of a metal medium can be prominently reduced, and the conductive shielding performance of the material can be improved.
Description
Technical field
The present invention relates to a kind of electrically conducting coating based on polyurethane dispersions, particularly a kind of shielding conductive material.
Background technology
Electrically conducting coating is eighties of last century sixties end, the development of advancing by leaps and bounds along with electronic technology, electronic product is to needs light, thin, that miniaturization is expanded, and a kind of functional coating of research and development, belong to fine chemical technology field, because the method for its construction is easy, can spray, brush, and be not subject to the restriction of material structure size shape, can be easily at non-conductive material surface coated one deck conductive layer, thus make it have the absorption as metal, conduction and the electromagnetic characteristic that decays, play the effect of shielding electromagnetic interference.
Electrically conducting coating Application Areas is very extensive, mainly used in a large number at aspects such as communication electronics, business automation equipment, industrial control equipment, medical facilities, consumer electronics product, instrument, aerospace and military hardwares, it towards material mainly contain the non-metallic material such as plastics, Bo Li steel work, pottery.
Electrically conducting coating is solvent type at the beginning of inventing, for solution and the cohesiveness of plastics material surface, often adopt corrosion type solvent, and environment and security are brought to certain impact.Along with the technical progress of the developed countries such as America and Europe, the use of coating is proposed stricter, based on the standard of environment protection and security, reliability aspect, the research and development of waterborne conductive coating just become the inexorable trend of coating industry.The waterborne conductive coating that can see is in the market water, solvent (the gentle solvent take water-base resin as binding agent, for example alcohol lipid) class of mixture diluted agent, significantly reduce the content of VOC, substantially meet environmental requirement, but in their product, the dielectric amount ratio of metal guide is higher, generally all between 25～40%, select silver-coated copper powder and fine silver powder or blending ratio to use by different requirements, to meet the requirement of dissimilar material body structure surface conductive characteristic and shielding electromagnetic wave.
Summary of the invention
The object of the invention is to provide a kind of electrically conducting coating based on polyurethane dispersions, this electrically conducting coating effectively avoids metal powder to be positioned at carrier inside, thereby more easily form fine and close metal level on surface, and can significantly reduce the usage quantity of metal medium, greatly reduce cost, and improve its conductive shield performance.
For achieving the above object, the technical solution used in the present invention is:
Based on an electrically conducting coating for polyurethane dispersions, described electrically conducting coating is that 8000 ± 1000cps carrier solvent forms by flake metal powder, viscosity, and described flake metal powder, carrier solvent quality percentage composition is separately as follows:
Flake metal powder 15%～30%;
Carrier solvent 70%～85%;
Described carrier solvent is made up of the component of following quality percentage composition:
Polyurethane dispersions 6%～25%,
Ethanol 30%～60%;
Virahol 10%～20%,
Vinyl acetic monomer 2%～8%;
Butanols 1%～4%,
Deionized water 5%～15%,
Water cross-linking agent 2%～5%,
Triethylamine 1%～3%,
N-Methyl pyrrolidone 2%～8%,
Thickening material 0.5%～2%;
The viscosity of described carrier solvent is 8000 ± 1000cps/20 ℃;
Described polyurethane dispersions is aqueous polyurethane dispersion or aliphatics anion polyurethane dispersion;
In the time that described polyurethane dispersions is aqueous polyurethane dispersion, described thickening material is a kind of in polyether-polyurethane, Natvosol, hydroxypropylcellulose or its mixture;
In the time that described polyurethane dispersions is fats anion polyurethane dispersion, described thickening material is a kind of in polyacrylic acid, formaldehyde CALCIUM ACRYLATE, ether cross-linked acrylic acid or its mixture.
In technique scheme, further improve technical scheme as follows:
1,, in such scheme, described flake metal powder is sheet silver part, flaky silver coated copper powder, Nickel Powder, zinc flake or its mixture.
2,, in such scheme, the pH value of described carrier solvent is 7.5 ~ 8.
Because technique scheme is used, the present invention compared with prior art has following advantages and effect:
1, electrically conducting coating of the present invention adopts specific formula and content to be conducive to flake metal powder in electrocondution slurry to be supported in carrier solvent surface, effectively avoid metal powder to be positioned at carrier inside, thereby more easily form fine and close metal level on surface, and can significantly reduce the usage quantity of metal medium, greatly reduce cost, and improve its conductive shield performance.
2, electrically conducting coating of the present invention adopts the double solvents by ethanol, Virahol, vinyl acetic monomer, butanols combination, reduce azeotropic point, improved evaporation rate and guaranteed that its evaporation rate is even, thereby improved the flatness of the finished product film forming, and reducing micropore, conductivity is also improved.
3, the water of the certain content of electrically conducting coating of the present invention is both as electrical conductor, due to itself and aqueous polyurethane dispersion and aliphatics anion polyurethane dispersion intermiscibility low, dispersible aqueous polyurethane dispersion or aliphatics anion polyurethane dispersion, thereby the effect of middle performance thickening material, is further conducive to surface filming; Secondly, the favourable electrically conducting coating of N-Methyl pyrrolidone of interpolation is in the bonding force of base material.
Embodiment
Below in conjunction with embodiment, the invention will be further described:
Embodiment 1: a kind of electrically conducting coating based on polyurethane dispersions, for notebook computer, the product plastic rubber substrates (PC+ABS) such as DVD, its formula is as follows:
Flaky silver coated copper powder 15%;
Carrier solvent 85%;
Described carrier solvent is made up of the component of following quality percentage composition:
Aliphatics anion polyurethane dispersion 8%,
Ethanol 55%,
Virahol 12%,
Vinyl acetic monomer 5%,
Butanols 3%,
Deionized water 8%,
Water cross-linking agent 2%,
Triethylamine 1.5%,
N-Methyl pyrrolidone 5%,
Thickening material 0.5%;
The viscosity of above-mentioned carrier solvent is 8000 ± 1000cps/20 ℃;
Above-mentioned thickening material is a kind of in polyacrylic acid, formaldehyde CALCIUM ACRYLATE, ether cross-linked acrylic acid or its mixture;
Coating spray sample test result:
Resistance: 0.02 Ω/sq(build 25um);
Sticking power: 100%, (3M600 vertically draws);
Effectiveness of shielding: 60dB above (30MHz ~ 3GHz), surface hardness >2H;
Drying temperature: 60 ℃, 20 minutes.
Embodiment 2: a kind of electrically conducting coating based on polyurethane dispersions, for e-book surface spraying PC+ glass base material, its formula is as follows:
Flaky silver coated copper powder 18%;
Carrier solvent 82%;
Described carrier solvent is made up of the component of following quality percentage composition:
Aliphatics anion polyurethane dispersion 12%,
Ethanol 50%,
Virahol 12%,
Vinyl acetic monomer 5%,
Butanols 3%,
Deionized water 8%,
Water cross-linking agent 3%,
Triethylamine 1.5%,
N-Methyl pyrrolidone 5%,
Thickening material 0.5%;
The viscosity of above-mentioned carrier solvent is 8000 ± 1000cps/20 ℃;
Above-mentioned thickening material is a kind of in polyacrylic acid, formaldehyde CALCIUM ACRYLATE, ether cross-linked acrylic acid or its mixture;
Coating spray sample test result:
Resistance: 0.3 Ω/20cm(build 25um), standard-required: resistance <0.5 Ω/20cm;
Sticking power: 100%, (3M600 adhesive tape vertically draws);
Effectiveness of shielding: 65dB above (30MHz ~ 3GHz), surface hardness >2H;
Drying temperature: 60 ℃, 20 minutes.
Embodiment 3: a kind of electrically conducting coating based on polyurethane dispersions, for glass fiber reinforced plastics product (U.S.'s Benz hybrid power box), its formula is as follows:
Flaky silver coated copper powder 22%;
Carrier solvent 78%;
Described carrier solvent is made up of the component of following quality percentage composition:
Aliphatics anion polyurethane dispersion 25%,
Ethanol 34%,
Virahol 15%,
Vinyl acetic monomer 5%,
Butanols 3%,
Deionized water 8%,
Water cross-linking agent 3%,
Triethylamine 1.5%,
N-Methyl pyrrolidone 5%,
Thickening material 0.5%;
The viscosity of above-mentioned carrier solvent is 8000 ± 1000cps/20 ℃;
Above-mentioned thickening material is a kind of in polyacrylic acid, formaldehyde CALCIUM ACRYLATE, ether cross-linked acrylic acid or its mixture.
Coating spray sample test result:
Resistance: 0.02 Ω/sq(build 25um);
Sticking power: 100%, (3M600 adhesive tape vertically draws);
Effectiveness of shielding: 71 ~ 76dB above (30MHz ~ 3GHz), surface hardness >2H;
Drying temperature: 60 ℃, 20 minutes, also can certainly do for 6 hours.
Embodiment 4: a kind of electrically conducting coating based on polyurethane dispersions, for mobile phone, military formula equipment shielding electromagnetic interference fine silver formulation for coating material, its formula is as follows:
Flake silver powder 30%;
Carrier solvent 70%;
Described carrier solvent is made up of the component of following quality percentage composition:
Aliphatics anion polyurethane dispersion 20%,
Ethanol 42%,
Virahol 12%,
Vinyl acetic monomer 5%,
Butanols 3%,
Deionized water 8%,
Water cross-linking agent 3%,
Triethylamine 1.5%,
N-Methyl pyrrolidone 5%,
Thickening material 0.5%;
The viscosity of above-mentioned carrier solvent is 8000 ± 1000cps/20 ℃;
Above-mentioned thickening material is a kind of in polyacrylic acid, formaldehyde CALCIUM ACRYLATE, ether cross-linked acrylic acid or its mixture.
Coating spray sample test result:
Resistance: 0.02 Ω/sq(build 15um);
Sticking power: 100%, (3M600 adhesive tape vertically draws);
Effectiveness of shielding: >80dB above (30MHz ~ 3GHz), surface hardness >2H;
Drying temperature: 50 ℃, certainly do for 10 minutes or 6 hours.
Embodiment 5: a kind of electrically conducting coating based on polyurethane dispersions, for ABS base material, its formula is as follows:
Flaky silver coated copper powder 18%;
Carrier solvent 82%;
Described carrier solvent is made up of the component of following quality percentage composition:
Aqueous polyurethane dispersion 12%,
Ethanol 47%,
Virahol 15%,
Vinyl acetic monomer 5%,
Butanols 3%,
Deionized water 8%,
Water cross-linking agent 3%,
Triethylamine 1.5%,
N-Methyl pyrrolidone 5%,
Thickening material 0.5%;
The viscosity of described carrier solvent is 8000 ± 1000cps/20 ℃;
Above-mentioned thickening material is a kind of in polyether-polyurethane, Natvosol, hydroxypropylcellulose or its mixture;
Coating spray sample test result:
Resistance: 0.03 Ω/sq(build 25um);
Sticking power: 100%, (3M600 adhesive tape vertically draws);
Effectiveness of shielding: 70dB above (30MHz ~ 3GHz), surface hardness >2H;
Drying temperature: 60 ℃, 20 minutes, also can certainly do for 6 hours.
Embodiment 6: a kind of electrically conducting coating based on polyurethane dispersions, for speaker net, its formula is as follows:
Nickel Powder 18%;
Carrier solvent 82%;
Described carrier solvent is made up of the component of following quality percentage composition:
Aqueous polyurethane dispersion 15%,
Ethanol 47%,
Virahol 12%,
Vinyl acetic monomer 5%,
Butanols 3%,
Deionized water 8%,
Water cross-linking agent 3%,
Triethylamine 1.5%,
N-Methyl pyrrolidone 5%,
Thickening material 0.5%;
The viscosity of described carrier solvent is 8000 ± 1000cps/20 ℃;
Above-mentioned thickening material is a kind of in polyether-polyurethane, Natvosol, hydroxypropylcellulose or its mixture;
Coating spray sample test result:
Resistance: 0.5 Ω/sq(build 25um);
Sticking power: 100%, (3M600 adhesive tape vertically draws);
Effectiveness of shielding: >40dB above (30MHz ~ 3GHz), surface hardness >2H;
Drying temperature: 50 ℃, certainly do for 10 minutes or 6 hours.
Above-mentioned thickening material is a kind of in polyether-polyurethane, Natvosol, hydroxypropylcellulose or its mixture.
Above-described embodiment is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences that spirit is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (1)
1. the electrically conducting coating based on polyurethane dispersions, is characterized in that: the carrier solvent that described electrically conducting coating is 8000 ± 1000cps by flake metal powder, viscosity forms, and described flake metal powder, carrier solvent quality percentage composition is separately as follows:
Flake metal powder 15%～30%;
Carrier solvent 70%～85%;
Described carrier solvent is made up of the component of following quality percentage composition:
Polyurethane dispersions 6%～25%,
Ethanol 30%～60%,
Virahol 10%～20%,
Vinyl acetic monomer 2%～8%,
Butanols 1%～4%,
Deionized water 5%～15%,
Water cross-linking agent 2%～5%,
Triethylamine 1%～3%,
N-Methyl pyrrolidone 2%～8%,
Thickening material 0.5%～2%;
Described polyurethane dispersions is aqueous polyurethane dispersion or aliphatics anion polyurethane dispersion;
In the time that described polyurethane dispersions is aqueous polyurethane dispersion, described thickening material is a kind of in polyether-polyurethane, Natvosol, hydroxypropylcellulose or its mixture;
In the time that described polyurethane dispersions is fats anion polyurethane dispersion, described thickening material is a kind of in polyacrylic acid, formaldehyde acrylate, ether cross-linked acrylic acid or its mixture.
2. electrically conducting coating according to claim 1, is characterized in that: described flake metal powder is flake silver powder, flaky silver coated copper powder, Nickel Powder, zinc flake or its mixture.
3. electrically conducting coating according to claim 1, is characterized in that: the pH value of described carrier solvent is 7.5 ~ 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210125686.8A CN102653659B (en) | 2012-04-26 | 2012-04-26 | Conductive coating material based on polyurethane dispersion body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210125686.8A CN102653659B (en) | 2012-04-26 | 2012-04-26 | Conductive coating material based on polyurethane dispersion body |
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| CN102653659A CN102653659A (en) | 2012-09-05 |
| CN102653659B true CN102653659B (en) | 2014-05-14 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104341862A (en) * | 2013-07-27 | 2015-02-11 | 安徽顺彤包装材料有限公司 | Antistatic coating liquid |
| CN105086567B (en) * | 2015-08-05 | 2017-11-21 | 安徽开林新材料股份有限公司 | One kind paints special radioresistance solvent and preparation method thereof |
| CN108997952A (en) * | 2017-06-06 | 2018-12-14 | 苏州艾达仕电子科技有限公司 | Low temperature high adhesion force conductive silver paste |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1760294A (en) * | 2005-11-04 | 2006-04-19 | 上海市合成树脂研究所 | Water based conductive coating |
| CN102002314A (en) * | 2010-09-29 | 2011-04-06 | 中国科学院长春应用化学研究所 | Nano dispersed water-based conductive primer for vehicle bumper and preparation method thereof |
| CN102234478A (en) * | 2010-04-20 | 2011-11-09 | 东莞市佩琦涂料有限公司 | Water-borne conductive barrier coating |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1760294A (en) * | 2005-11-04 | 2006-04-19 | 上海市合成树脂研究所 | Water based conductive coating |
| CN102234478A (en) * | 2010-04-20 | 2011-11-09 | 东莞市佩琦涂料有限公司 | Water-borne conductive barrier coating |
| CN102002314A (en) * | 2010-09-29 | 2011-04-06 | 中国科学院长春应用化学研究所 | Nano dispersed water-based conductive primer for vehicle bumper and preparation method thereof |
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