CN100432171C - Conductive coating composition and conductive film for shielding electromagnetic wave made thereof - Google Patents
Conductive coating composition and conductive film for shielding electromagnetic wave made thereof Download PDFInfo
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- CN100432171C CN100432171C CNB2005101080663A CN200510108066A CN100432171C CN 100432171 C CN100432171 C CN 100432171C CN B2005101080663 A CNB2005101080663 A CN B2005101080663A CN 200510108066 A CN200510108066 A CN 200510108066A CN 100432171 C CN100432171 C CN 100432171C
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- 239000008199 coating composition Substances 0.000 title description 2
- 239000000203 mixture Substances 0.000 claims abstract description 68
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000002245 particle Substances 0.000 claims abstract description 42
- 239000003973 paint Substances 0.000 claims abstract description 39
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 29
- 229910052709 silver Inorganic materials 0.000 claims abstract description 28
- 239000004332 silver Substances 0.000 claims abstract description 28
- 239000006185 dispersion Substances 0.000 claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 21
- 229920002635 polyurethane Polymers 0.000 claims abstract description 21
- 239000004814 polyurethane Substances 0.000 claims abstract description 21
- 239000002904 solvent Substances 0.000 claims abstract description 9
- 238000000518 rheometry Methods 0.000 claims description 18
- 229920003009 polyurethane dispersion Polymers 0.000 claims description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 9
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- 229920000728 polyester Polymers 0.000 claims description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 150000002148 esters Chemical class 0.000 claims description 4
- UAEPNZWRGJTJPN-UHFFFAOYSA-N methylcyclohexane Chemical compound CC1CCCCC1 UAEPNZWRGJTJPN-UHFFFAOYSA-N 0.000 claims description 4
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- 229920005862 polyol Polymers 0.000 claims description 4
- 150000003077 polyols Chemical class 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 125000001931 aliphatic group Chemical group 0.000 claims description 3
- 125000003118 aryl group Chemical group 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 2
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 claims description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims description 2
- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000010419 fine particle Substances 0.000 abstract 1
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- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- 208000003174 Brain Neoplasms Diseases 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 206010019233 Headaches Diseases 0.000 description 1
- 101000618467 Hypocrea jecorina (strain ATCC 56765 / BCRC 32924 / NRRL 11460 / Rut C-30) Endo-1,4-beta-xylanase 2 Proteins 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
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- 231100000869 headache Toxicity 0.000 description 1
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- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 208000032839 leukemia Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
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- 239000012266 salt solution Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
- H05K9/0083—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising electro-conductive non-fibrous particles embedded in an electrically insulating supporting structure, e.g. powder, flakes, whiskers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electromagnetism (AREA)
- Dispersion Chemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Conductive Materials (AREA)
Abstract
The present invention discloses a conductive paint composition which is used to shield the electromagnetic wave, which can effectively settle the problem of the electromagnetic interference (EMI) and radio frequency interference (RFI) caused by the electromagnetic wave that generated by the inner component of the electronic appliance. The composition contains the silver-coated copper powder which is provided with fine particle size, so it can greatly improve the durability of the conductive film which is prepared by it. The conductive paint composition contains polyurethane water dispersion, metal powder, solvent and flowing deformation control agent, wherein, the metal powder is silver-coated copper powder whose average particle size is 2 to 20 mu m or a mixture which is composed by the silver-coated copper powder and the silver powder whose average particle size is 2 to 20 mu m, and the polyurethane water dispersion is a mixture which is composed of at least two kinds of polyurethane water dispersion.
Description
Technical field
The present invention relates to a kind of conductive paint compositions of electromagnetic wave shielding, a kind of conducting film that is used for electromagnetic wave shielding and a kind of substrate that is used for electromagnetic wave shielding that contains described conducting film that makes by described composition of being used for.Especially, the present invention relates to have superior electrical conductivity, the conductive paint compositions of viscosity, substrate tackiness, wear resistance and weather resistance, it contains as the metal-powder of conducting material and a kind of polyurethane aqueous dispersion body.
Background technology
According to reports, generally speaking, the hertzian wave that produces by the inner member of various electronicss such as communication terminal, notebook computer, business equipment, medical facilities etc., can cause various diseases,, reproductive function unusual such as headache, part DE, leukemia, brain tumor, circulation descends and the VDP syndromes.For this reason, people improve just day by day for the concern of hertzian wave to the harmful effect of human body.And because the equipment integration degree is along with the electronic product weight trend that lightens improves, the electromagnetic noise that is produced by the discrete component of electronic product usually can cause the mishandle of surrounding devices, causes the interference in these equipment.
So, recently, for the shielding electromagnetic waves standard that produces by family, commercial and industrial electronic product such as computer, wireless telephony, automobile, medical facilities and multimedia device, become more strict, and, for the restriction of the emission of electromagnetic interference (EMI) and radio frequency interference (RFI), it is severeer also to become.For this reason, shield the hertzian wave method for transmitting of various electronicss and parts, just becoming an important theme of research in the future.
Know as is known to the person skilled in the art, the common method of shielding electromagnetic wave comprises plating, vacuum vapor deposition and spraying.Adopt the method for plating shielding electromagnetic wave, through using for a long time, still, there were some problems in it, because it has improved production cost, made complex manufacturingization already, and caused environmental pollution.So, need improve this method.
Simultaneously, adopt the method for vacuum vapor deposition shielding electromagnetic wave, only can be used among the very limited application, because it causes high cost and has the problem of long-term reliability.On the contrary, adopt the technology of metallize powder shielding electromagnetic wave, be used widely now, because it is easy to use and can not cause environmental problem.
Spraying method comprises a kind of coating fluid coated substrates that contains the mixture of tacky resin and conducting metal of employing.The conducting coat that is obtained by spraying method need have superior electrical conductivity, substrate tackiness and wear resistance, and, even its initial physical performance can not change yet in various varying environments.Especially, even run into the weather of variation in the circulation of electronics and use, its initial physical performance of conducting film that is coated on the electronics internal surface should not change yet.When the electroconductibility that is coated in on-chip conducting film or tackiness owing to when climate change and variation, will cause the disabler of electronics.For this reason, the weather resistance of conducting film is the physicals an of necessity.
Summary of the invention
Therefore, the present invention makes great efforts to satisfy the technical requirements of the technical field of the invention, a target of the present invention provides a kind of conductive paint compositions with excellent durability, it contain a kind of have a fine grain size be coated with the silver-bearing copper powder, and thereby can form a kind of finer and close conducting film.
Another target of the present invention provides a kind of conducting film that is used for electromagnetic wave shielding, it has excellent capability of electromagnetic shielding and weather resistance, so, in the time of on being applied to electronics, even the climate change situation that may take place in electronics circulation and use, it will keep its initial physical performance.
Another target of the present invention provides a kind of substrate that is used for electromagnetic wave shielding, and it contains above-mentioned conducting film, and thereby shows excellent electromagnetic wave shielding effect.
In order to realize above-mentioned target, on the one hand, the invention provides a kind of conductive paint compositions that contains polyurethane aqueous dispersion body, metal-powder, solvent and rheology control agent, wherein, described metal-powder can be to have average particle size particle size (D50) to be coated with the silver-bearing copper powder for 2-20 μ m, or a kind of by the described silver-bearing copper powder and have the mixture that average particle size particle size (D50) is formed for the silver powder of 2-10 μ m of being coated with, described polyurethane aqueous dispersion body is a kind of mixture of being made up of at least two kinds of polyurethane aqueous dispersion bodies.
On the other hand, the invention provides a kind of conducting film that is used for electromagnetic wave shielding, it is prepared by conductive paint compositions of the present invention.
Another aspect the invention provides a kind of substrate that is used for electromagnetic wave shielding, and it contains conducting film of the present invention.
Embodiment
Above-mentioned and other target of the present invention, feature and advantage can obtain clearer understanding from following detailed description and preferred implementation.
Conductive paint compositions of the present invention contains polyurethane aqueous dispersion body, metal-powder, solvent and rheology control agent.
Conductive paint compositions of the present invention preferably contains: the solvent of the polyurethane aqueous dispersion body of 1-60wt%, the metal-powder of 10-60wt%, 10-60wt% and the rheology control agent of 5-20wt%.
Hereinafter, will every kind of composition of conductive paint compositions of the present invention be described in detail.
As for the metal-powder in the conductive paint compositions of the present invention, the silver-bearing copper powder that is coated with fine grain size preferably uses separately or uses with a kind of form of mixtures with silver powder.
Silver powder is mainly used among the existing electric conduction paint, is used for the hertzian wave of shielded electronic equipment such as mobile telephone, and these electronicss are owing to their small size and unicircuit are easy to launching electromagnetic wave.Silver powder has the advantage of superior electrical conductivity, but exists a problem, is expensive because compare it with other material, thereby causes the raising of whole technology cost.Simultaneously, copper powder has advantage cheaply, but it also exists a problem, because it has reduced the weather resistance of conducting film, so it is difficult to use in actual applications.
For this reason, in the prior art, people attempt to be coated with the silver-bearing copper powder by use and solve this problem as metal-powder.But, in this effort, have average particle size particle size (D50) during as the thin slice powder of 30-50 μ m when using, then adopt the conductive paint compositions that contains this thin slice powder to prepare conducting film and can cause problem, because the conducting film surface is coarse, and its weather resistance reduces.
In the present invention, for disposable all these problems are solved, what have best particle size (D50) scope and be 2-20 μ m is coated with the silver-bearing copper powder, preferred uses separately or with a kind of with have the form of mixtures use of average particle size particle size as 1-10 μ m silver powder.More preferably, have average particle size particle size be 8-20 μ m be coated with that the silver-bearing copper powder uses separately or with a kind of with have the form of mixtures use of average particle size particle size as 4-10 μ m silver powder.
Have average particle size particle size and be coated with the silver-bearing copper powder if use less than 2 μ m, then use the economical effectiveness of copper powder, will can not realize owing to the quick growth of this metal-powder cost, have average particle size particle size and be coated with the silver-bearing copper powder if use greater than 20 μ m, the then surface of coating electrically conductive film meeting roughen, and its weather resistance can reduce, as mentioned above.
The specific examples that is coated with the silver-bearing copper powder that can be used among the present invention comprises (but being not limited to these): AgCu-400, AgCu-500 and AgCu-550 (can be from Ferro Corp., USA buys).The specific examples that can be used for the silver powder among the present invention comprises (but being not limited to these): and SF-70A, SF-9ED and SF-9 (Ferro Corp., USA) and SF-162 (HRP Co.).
When use by described have the regulation particle size be coated with mixture that silver-bearing copper powder and described silver powder forms as metal-powder of the present invention the time, the described blending ratio that is coated with silver-bearing copper powder and described silver powder is preferably 99: 1-30: within the scope of 70 (w/w).If in described metal powder mixture, be coated with silver-bearing copper powder ratio, then be coated with the economical effectiveness that the silver-bearing copper powder obtains and just can not realize by use less than 30 weight %.
And the metal-powder in the conductive paint compositions of the present invention can adopt C
4-C
22Use after the surface treatment of lipid acid.Using its surface had been favourable through the metal-powder of employing fatty acid treatment already, oxidized because this metal-powder can be avoided, and tacky resin was had the affinity of raising.Can be used for lipid acid example of the present invention and comprise (but being not limited to these) oleic acid, stearic acid etc.
The consumption of metal-powder preferably accounts for the 10-60wt% of conductive paint compositions gross weight of the present invention.If the metal-powder consumption is less than 10wt%, then the electroconductibility of described composition can variation, if its consumption greater than 60wt%, then the production cost of described composition can increase.
Another kind of component polyurethane water dispersion as for electrically conductive composition of the present invention can use a kind of mixture of being made up of at least two kinds of polyurethane aqueous dispersion bodies.
Preferably, can use a kind of by at least a polyurethane dispersions (A) and at least a mixture by the isocyanic ester and the polyurethane dispersions (B) of the polyester based polyol reaction acquisition with aliphatic structure are formed by isocyanic ester and the polyester based polyol reaction with aromatic structure are obtained.
In this, dispersion (A) and blending ratio (B), preferably 70: 30-20: in 80 (w/w) scope, and solid content is 1-50wt% in the polyurethane dispersions.Being used in combination of aforesaid at least two kinds of polyurethane dispersions with different structure, the use of more single polyurethane dispersions can improve tackiness and resistance to salt water.
The product of selling as polyurethane dispersions (A) comprises (but being not limited to these): PS-3 and PS-6 (Ortec Inc.) and SANCURE 1591 (Noveon Inc.), the product as polyurethane dispersions (B) of sale comprises (but being not limited to these): SANCURE 12954 and SANCURE 2715 (Noveon Inc.) and Neorez-R-9679 (Avecia Inc.).
The consumption of polyurethane dispersions is preferably the 1-60wt% of conductive paint compositions gross weight of the present invention.If the polyurethane dispersions consumption is less than 1wt%, then described composition will variation to the tackiness of substrate and wear resistance, if its consumption greater than 60wt%, then it can cause that resistance increases.
Another kind of composition solvent as for conductive paint compositions of the present invention can use at least a material that is selected from the group of being made up of following substances: methyl alcohol, ethanol, Virahol, ethyl acetate, methyl-2-pyrrolidone, acetone, methylcyclohexane, ethyl cellosolve and ethylene glycol butyl ether.
Solvent load is preferably the 10-60wt% of conductive paint compositions gross weight of the present invention.
The another kind of composition rheology control agent of conductive paint compositions of the present invention can be a kind of acrylate copolymer, but is not limited thereto.The specific examples of selling as rheology control agent comprises (but being not limited to these) EX-2 and C676 (Carbopol) and Rheolate 5000 (Rhenox).
Rheology control agent preferably uses with paste form.Use rheology control agent with paste form, can prevent the rheology control agent gathering, when using, will assemble with powder type.Described rheology control agent can be made paste according to the known any conventional method of prior art.
Described rheology control agent consumption is preferably the 5-20wt% of conductive paint compositions gross weight of the present invention, is preferably 8-15wt%.If metal-powder precipitation, then will take place less than 5wt% in described rheology control agent consumption, if its consumption greater than 20wt%, then it will cause that resistance increases.
Simultaneously, if desired, conductive paint compositions of the present invention also can contain other additive of 0.1-10wt%, as flow agent and dispersion agent, as long as they do not have a negative impact to the present invention.
Through this conductive paint compositions of the present invention for preparing, by the plastic casing (forming) of coating mobile telephone, PDA, notebook computer, automobile navigation apparatus, GPS device etc., can be used for the purpose of shielding electromagnetic wave by polycarbonate or carbonate mixture, acrylonitrile-butadiene-styrene (ABS) mixture etc.
Hereinafter, by using embodiment, will be for a more detailed description to the present invention.But, be noted that these embodiment only are for the illustrations purpose provides, and can not be interpreted as limitation of the scope of the invention.
The paste of preparation rheology control agent (Carbopol EZ-2)
Prepare a kind of rheology control agent of the present invention that is used in the following manner.
950g ethanol is put in the special container,, adopted high speed agitator to stir simultaneously with the 700rpm peripheral speed then to the Carbopol EZ-2 that wherein adds 20g.After stirring 30 minutes, adopt the Ethomeen of 30g with the 800rpm peripheral speed
C-25 (Akzo) neutralizes to this solution.After adding amine, mixture stirred 1 hour with the 1000rpm peripheral speed, thereby prepared the paste of rheology control agent.
Embodiment 1
In Dispermat D-51580 model (VMA GETZMANN GMBH), add the 70g polyurethane aqueous dispersion body, this dispersion is by SANCURE 12954 (Noveon Inc., USA) and REACTISOL PS-3 (Ortec Inc., USA) mixture of forming with 2: 1 (w/w).Then, adding 125g has average particle size particle size (D50) and is coated with silver-bearing copper powder (AgCu-550 for being purchased of 8-15 μ m; Ferro Corp., USA), mixture stirred 30 minutes with the 2000rpm peripheral speed.In this stirred solution, add 245g ethanol, then stirred 10 minutes with the 500rpm peripheral speed.In gained solution, add the above-mentioned Carbopol paste that makes of 60g, stirred 30 minutes, control the viscosity of this solution simultaneously with the 1000rpm peripheral speed.
Prepared sample dilutes in 100vol% ethanol, and diluent is sprayed to polycarbonate thin plate (15cm wide * 6cm length * 2mm is thick), to dry coating thickness be 12.5 μ m.Sample application in drying oven in 60 ℃ of dryings 15 minutes.Physicals to the gained sample application is estimated, and the gained result is shown in following table 1.
Embodiment 2
In Dispermat D-51580 model (VMA GETZMANN GMBH), add the 85g polyurethane aqueous dispersion body, this dispersion is by SANCURE 12954 (Noveon Inc., USA) and REACTISOL PS-3 (Ortec Inc., USA) mixture of forming with 2: 1 (w/w).Then, be purchased silver powder (SF-70A to wherein adding 100g; Ferro Corp. USA) has average particle size particle size (D50) with 100g and is coated with silver-bearing copper powder (AgCu-550 for being purchased of 8-15 μ m; Ferro Corp., USA), mixture stirred 30 minutes with the 2000rpm peripheral speed.In this stirred solution, add 140g ethanol, then stirred 10 minutes with the 500rpm peripheral speed.In gained solution, add the above-mentioned Carbopol paste that makes of 75g, stirred 30 minutes, control the viscosity of this solution simultaneously with the 1000rpm peripheral speed.
Prepared sample dilutes in 100vol% ethanol, and diluent is sprayed to polycarbonate thin plate (15cm wide * 6cm length * 2mm is thick), to dry coating thickness be 12.5 μ m.Sample application in drying oven in 60 ℃ of dryings 15 minutes.Physicals to the gained sample application is estimated, and the gained result is shown in following table 1.
Comparative Examples 1
Repeat the step of embodiment 1, difference is to use that a kind of to have average particle size particle size (D50) be that being purchased of 35 μ m is coated with silver-bearing copper powder (AgCu-250; Ferro Co. is USA) as described metal-powder.
Comparative Examples 2
Repeat the step of embodiment 2, difference is to use 100g to be purchased silver powder (SF-70A; Ferro Corp., USA) having average particle size particle size (D50) with 100g is that being purchased of 45 μ m is coated with silver-bearing copper powder (AgCu-200; Ferro Co. is USA) as described metal-powder.
Comparative Examples 3
Repeat the step of embodiment 1, difference is to use separately SANCURE12954, and (Noveon Inc. is USA) as described polyurethane aqueous dispersion body.
Comparative Examples 4
Repeat the step of embodiment 1, difference is to use separately REACTISOL PS-3, and (Ortec Inc. is USA) as described polyurethane aqueous dispersion body.
Comparative Examples 5
Repeat the step of embodiment 1, difference be to use separately SANCURE12954 (Noveon Inc., USA) as described polyurethane aqueous dispersion body and use a kind of have average particle size particle size (D50) be 35 μ m be coated with silver-bearing copper powder (AgCu-250; Ferro Corp. is USA) as described metal-powder.
(table 1)
| Resistance | Tackiness | |
| Embodiment 1 | 0.050 | 5B |
| Embodiment 2 | 0.015 | 5B |
| Comparative Examples 1 | 0.050 | 5B |
| Comparative Examples 2 | 0.015 | 5B |
| Comparative Examples 3 | 0.050 | 2B |
| Comparative Examples 4 | 0.050 | 2B |
| Comparative Examples 5 | 0.060 | 1B |
[physical property evaluation]
*Resistance: adopt the surface resistivity evaluation of volt ohm-milliammeter with unit surface.
*Tackiness: adopt ASTM D3359 to estimate.
The weather resistance of the conducting film that embodiment 1-2 and Comparative Examples 1-5 are obtained is estimated, and the result is shown in following table 2.
*Performance when high temperature and high humidity: estimate after under 85 ℃ and 85%RH condition, having 72 hours.
*Thermal shock resistance: after 20 circulations, estimate, each circulation by-20 ℃ 1 hour and formed in 1 hour at 80 ℃.
*Resistance to salt water: in being positioned over 25 ℃ 5% salt solution 72 hours and then estimate after 20 minutes in 60 ℃ of dryings.
(table 2)
As shown in table 2, be the conducting film that the existing electric conduction paint membrane prepare that is coated with the silver-bearing copper powder of 30-50 μ m obtains by containing average particle size particle size, in that resistance increases and the tackiness reduction through showing after the durability evaluation.On the contrary, be the conducting film of the present invention that the electric conduction paint membrane prepare that is coated with the silver-bearing copper powder of 2-20 μ m obtains by containing average particle size particle size, through still keeping their initial physical performance after the durability evaluation.And, use and a kind ofly have polyurethane dispersions that the polyester based polyvalent alcohol of aromatic structure obtains and have the situation of the mixture of the polyurethane dispersions that the polyester based polyvalent alcohol of aliphatic structure obtains by polymerization by polymerization, compare with the situation that polyurethane dispersions uses separately, have excellent tackiness and resistance to salt water.
As described above in detail as can be known, by the conducting film that conductive paint compositions of the present invention prepares, have excellent electric property and substrate tackiness, and its initial physical performance does not change in durability evaluation.Like this, the conducting film by coating compositions of the present invention prepares can shield the hertzian wave from several MHz to several GHz.Therefore, conductive paint compositions of the present invention can solve electromagnetic interference (EMI) and radio frequency interference (RFI) problem that the hertzian wave that produced by the inner member of various device such as communication terminal, notebook computer, automobile navigation apparatus, business equipment and medical facilities and so on causes effectively.
Though for the purpose of illustrations is described preferred implementation of the present invention,, as long as the multiple improvement of those skilled in the art, interpolation and to substitute all be possible be not away from the described scope of the invention of appended claim book and spirit.
Claims (13)
1. conductive paint compositions, contain polyurethane aqueous dispersion body, metal-powder, solvent and rheology control agent, wherein, described metal-powder be a kind of have average particle size particle size be 2-20 μ m be coated with the silver-bearing copper powder or a kind of to be coated with the silver-bearing copper powder and to have average particle size particle size be the mixture that the silver powder of 2-10 μ m is formed by described, described polyurethane aqueous dispersion body is a kind of mixture of being made up of at least two kinds of polyurethane aqueous dispersion bodies.
2. the described conductive paint compositions of claim 1, wherein, the described average particle size particle size that is coated with the silver-bearing copper powder is 8-20 μ m, and the average particle size particle size of described silver powder is 4-10 μ m.
3. the described conductive paint compositions of claim 1, wherein, the described weight blending ratio that is coated with silver-bearing copper powder and described silver powder is 99: 1-30: 70.
4. the described conductive paint compositions of claim 1, wherein, described metal-powder is to use C
4-C
22Lipid acid carries out surface-treated.
5. the described conductive paint compositions of claim 1, wherein, described polyurethane aqueous dispersion body is a kind of by at least a polyurethane dispersions (A) and at least a mixture of forming by the polyurethane dispersions (B) that isocyanic ester and the polyester based polyol reaction with aliphatic structure are obtained by isocyanic ester and the polyester based polyol reaction with aromatic structure are obtained.
6. the described conductive paint compositions of claim 5, wherein, described polyurethane dispersions (A) is 70 with the weight blending ratio of described polyurethane dispersions (B): 30-20: 80.
7. the described conductive paint compositions of claim 1, wherein, the solid content in the described polyurethane dispersions is 1-50wt%.
8. the described conductive paint compositions of claim 1, wherein, described solvent is at least a material that is selected from the group of being made up of following substances: methyl alcohol, ethanol, Virahol, ethyl acetate, methyl-2-pyrrolidone, acetone, methylcyclohexane, ethyl cellosolve and ethylene glycol butyl ether.
9. the described conductive paint compositions of claim 1, wherein, described rheology control agent is a kind of acrylate copolymer.
10. the described conductive paint compositions of claim 9, wherein, described rheology control agent is paste form.
11. the described conductive paint compositions of claim 1, it contains: the polyurethane aqueous dispersion body of 1-60wt%; The metal-powder of 10-60wt%; The solvent of 10-60wt%; Rheology control agent with 5-20wt%.
12. the conducting film that is used for electromagnetic wave shielding for preparing by the arbitrary described conductive paint compositions of claim 1-11.
13. a substrate that is used for electromagnetic wave shielding, it contains the described conducting film that is used for electromagnetic wave shielding of claim 12.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20040116623 | 2004-12-30 | ||
| KR2004116623 | 2004-12-30 | ||
| KR2004-116623 | 2004-12-30 | ||
| KR2005-70188 | 2005-08-01 | ||
| KR200570188 | 2005-08-01 |
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| CN1796477A CN1796477A (en) | 2006-07-05 |
| CN100432171C true CN100432171C (en) | 2008-11-12 |
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| CNB2005101080663A Expired - Fee Related CN100432171C (en) | 2004-12-30 | 2005-09-29 | Conductive coating composition and conductive film for shielding electromagnetic wave made thereof |
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| Country | Link |
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| KR (1) | KR100624316B1 (en) |
| CN (1) | CN100432171C (en) |
| TW (1) | TWI296641B (en) |
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| KR20080055238A (en) * | 2006-12-15 | 2008-06-19 | (주)파낙스이엠 | Composition for emi shield paint |
| TW201121405A (en) * | 2009-09-18 | 2011-06-16 | Toyo Ink Mfg Co | Electro-magnetic wave shielding film and wiring board |
| CN102424740A (en) * | 2011-11-25 | 2012-04-25 | 珠海天威飞马打印耗材有限公司 | Outer-layer protective water-based conductive coating for hard rubber charging roller |
| CN105399925B (en) * | 2015-12-02 | 2018-12-14 | 南京航空航天大学 | It can rapid curing polyurethane gamma ray shielding composite material and preparation method |
| CN105623406B (en) * | 2016-03-18 | 2018-06-15 | 信和新材料股份有限公司 | A kind of waterborne conductive type electromagnetic shielding building coating and its production method based on graphene |
| KR101904606B1 (en) * | 2016-10-11 | 2018-10-04 | 주식회사 케이씨씨 | Water soluable paint composition |
| KR101938341B1 (en) | 2017-05-22 | 2019-04-10 | 한밭대학교 산학협력단 | Lacquer Paint Composition for Shielding Electromagnetic Waves and the Fabrication Method Thereof |
| CN112795263A (en) * | 2021-02-05 | 2021-05-14 | 昆山睿翔讯通通信技术有限公司 | Metal shielding camera and manufacturing method thereof |
| CN112808551A (en) * | 2021-02-05 | 2021-05-18 | 昆山睿翔讯通通信技术有限公司 | Metal shielding camera and manufacturing method thereof |
| CN114213953A (en) * | 2021-12-30 | 2022-03-22 | 广州千顺工业材料有限公司 | Black water-based high-performance electromagnetic wave shielding coating and preparation method thereof |
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|---|---|---|---|---|
| US4715989A (en) * | 1986-01-22 | 1987-12-29 | The B.F. Goodrich Company | Coating for EMI shielding |
| US4950423A (en) * | 1986-01-22 | 1990-08-21 | The B. F. Goodrich Company | Coating of EMI shielding and method therefor |
| CN1224038A (en) * | 1997-11-13 | 1999-07-28 | 纳幕尔杜邦公司 | Water-based thick film conductive compositions |
| CN1441014A (en) * | 2002-02-27 | 2003-09-10 | 海尔科化工程塑料国家工程研究中心股份有限公司 | Environment protecting nano conducting paint composite and its prepn |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100455338B1 (en) * | 2001-11-21 | 2004-11-06 | 제일모직주식회사 | Conductive paint composition for shielding a substrate against EMI/RFI |
| KR100505117B1 (en) * | 2002-12-20 | 2005-07-29 | 제일모직주식회사 | A Conductive Paints Composition |
| KR100638393B1 (en) * | 2004-11-02 | 2006-10-26 | 주식회사 이엠씨플러스 | Paint for electromagnetic interference shielding and manufacturing method for the same |
-
2005
- 2005-08-01 KR KR1020050070188A patent/KR100624316B1/en active IP Right Grant
- 2005-09-29 CN CNB2005101080663A patent/CN100432171C/en not_active Expired - Fee Related
- 2005-09-30 TW TW094134367A patent/TWI296641B/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4715989A (en) * | 1986-01-22 | 1987-12-29 | The B.F. Goodrich Company | Coating for EMI shielding |
| US4950423A (en) * | 1986-01-22 | 1990-08-21 | The B. F. Goodrich Company | Coating of EMI shielding and method therefor |
| CN1224038A (en) * | 1997-11-13 | 1999-07-28 | 纳幕尔杜邦公司 | Water-based thick film conductive compositions |
| CN1441014A (en) * | 2002-02-27 | 2003-09-10 | 海尔科化工程塑料国家工程研究中心股份有限公司 | Environment protecting nano conducting paint composite and its prepn |
Also Published As
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|---|---|
| KR20060079068A (en) | 2006-07-05 |
| TW200621921A (en) | 2006-07-01 |
| TWI296641B (en) | 2008-05-11 |
| CN1796477A (en) | 2006-07-05 |
| KR100624316B1 (en) | 2006-09-13 |
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