CN108485357A - A kind of electromagnetic shielding grounded screen conductive coating and preparation method thereof - Google Patents
A kind of electromagnetic shielding grounded screen conductive coating and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of electromagnetic shielding grounded screen conductive coatings and preparation method thereof, are related to conductive coating technical field, which includes following raw material：Fluorocarbon resin, styrene-acrylic copolymer, vinylacetate, Modify bone glue, rosin, butter of tin, aerosil, aluminium-coated glass-fibre, igneous rock powder, ferrocene, anti-settling Aluminate ASA, crosslinking agent, dispersant, antifoaming agent and retarder thinner.Preparation method is by made from the ground and mixed to raw material.The conductive coating of the present invention prepares simple and convenient, with excellent adhesive strength, water proof anti-seepage, the performances such as corrosion-resistant, conducts electricity very well, service life is long, has the function of good security protection and electromagnetic shielding, and environmental suitability is strong, and application scenario is wide in range.
Description
Technical field
The present invention relates to conductive coating technical fields, and in particular to a kind of electromagnetic shielding grounded screen conductive coating and its system
Preparation Method.
Background technology
Currently, China, due to resource, economic dispatch, the material used in grounded screen is mainly ordinary carbon steel.Such material
Grounding body be embedded in underground be very easy to aoxidized and corroded.To prevent the corrosion of grounding body, it is necessary to take anti-corrosion measure, such as
Corrosion-resistant material is compared using copper etc., or in carbon steel surface spraying coating.At abroad, mostly using full copper mesh ground connection.Copper connects
Although ground body has antiseptic property, but since grounding body is embedded in underground humidity and various corrosive environment, copper-made grounding device
It can not equally avoid being corroded, only delay the speed being corroded；Welding and a large amount of non-ferrous metals of consume simultaneously.And
And copper-made grounding device cost is high, is unsuitable for large-scale use at home；Therefore the country mostly uses the grounding bodies such as copper clad steel, zinc Baogang；
But in actual moving process, coating inevitably wrecks and causes the corrosion of grounding body.In recent years, one kind answers
The anti-corrosion method that earthing or grounding means is surface-treated with corrosion-resistant conductive coating, because it is at low cost, efficient, construction is convenient
The characteristics of, it is received significant attention in earth mat anti-corrosion.And existing grounded screen on the market is improving its anti-corrosion more with conductive coating
Performance, there are many deficiencies for electromagnetic wave shielding, influence the work operation of grounding body, therefore, it is necessary to improve.
Invention content
For problems of the prior art, the present invention provides a kind of electromagnetic shielding grounded screen conductive coating and its
Preparation method, this kind of conductive coating prepare simple and convenient, high comprehensive performance, and service life is long.
In order to achieve the above object, the present invention is achieved through the following technical solutions：
A kind of electromagnetic shielding grounded screen conductive coating, including following raw material by weight：Fluorocarbon resin 40-50
Part, 10-15 parts of copolymer in cinnamic acrylic ester, 8-12 parts of vinylacetate, 4-6 parts of Modify bone glue, 1-2 parts of rosin, four
1.5-2 parts of stannic chloride, 3-5 parts of aerosil, 2-3 parts of aluminium-coated glass-fibre, 1.5-2.5 parts of igneous rock powder, ferrocene
0.3-0.5 parts, ASA0.6-0.8 parts of anti-settling Aluminate, 1-2 parts of crosslinking agent, 1-1.5 parts of dispersant, antifoaming agent 0.2-0.3
6-8 parts of part and retarder thinner；
Above-mentioned Modify bone glue is epoxychloropropane grafting, copolymerization and modification gelatine；
Above-mentioned copolymer in cinnamic acrylic ester is 2-3 by mass ratio:1 the first cinnamic acrylic ester and the second benzene
Ethylene-acrylate forms, and the content of acrylate is in 52-56%, melt index 115- in the first cinnamic acrylic ester
125g/10min；The content of acrylate is in 63-67%, melt index 120-130g/ in second cinnamic acrylic ester
10min。
Further, above-mentioned conductive coating includes following raw material by weight：45 parts of fluorocarbon resin, styrene-the third
12 parts of olefin(e) acid ester copolymer, 10 parts of vinylacetate, 5 parts of Modify bone glue, 1.5 parts of rosin, 1.75 parts of butter of tin, gas phase two
4 parts of silica, 2.5 parts of aluminium-coated glass-fibre, 2 parts of igneous rock powder, 0.4 part of ferrocene, 0.7 part of anti-settling Aluminate ASA,
7 parts of 1.5 parts of crosslinking agent, 1.25 parts of dispersant, 0.25 part of antifoaming agent and retarder thinner.
Further, above-mentioned copolymer in cinnamic acrylic ester is 2 by mass ratio:1 the first cinnamic acrylic ester
It is formed with the second cinnamic acrylic ester, the content of acrylate is melted 54% in first cinnamic acrylic ester
Index is 120g/10min；The content of acrylate is in 65%, melt index in second cinnamic acrylic ester
125g/10min。
Preferably, above-mentioned crosslinking agent is using any one of trimethylolpropane, dipentaerythritol or m-xylene diamine.
Preferably, above-mentioned dispersant is using any one of sodium tripolyphosphate, calgon or lignin.
Preferably, above-mentioned antifoaming agent uses tributyl phosphate or polydimethyl siloxane fluid.
Preferably, above-mentioned retarder thinner is using a kind of or a kind of in butyl acetate, cyclohexanone, ethyl acetate, acetone
More than.
Further, above-mentioned retarder thinner is butyl acetate, cyclohexanone in mass ratio 1:1 is blended.
Further, the length of above-mentioned aluminium-coated glass-fibre is 100-200 microns, draw ratio 10-12:1；Igneous rock powder
Grain size≤60 micron.
A kind of preparation method of above-mentioned electromagnetic shielding grounded screen conductive coating, follows the steps below：
(1) raw material is weighed by above-mentioned weight；
(2) it grinds：
Ⅰ：Aerosil, aluminium-coated glass-fibre, igneous rock powder, ferrocene, dispersant and retarder thinner are delivered to
Milled processed 4-6min in three-roll grinder obtains batch mixing A；
Ⅱ：Remaining other materials are added in three-roll grinder and are mixed with batch mixing A, co-ground to fineness of materials≤10
μm；
(3) material after grinding is added in reaction kettle, vacuum degree be 0.085-0.095MPa, temperature 85-90
2.5-3h is mixed under the conditions of DEG C.
The present invention has following advantageous effect：
(1) conductive coating of the invention by selection to raw materials for production and assembles, and selects that compatibility is good, performance is stablized
For the ingredients such as fluorocarbon resin, copolymer in cinnamic acrylic ester as raw material, the improvement of the outer adding assistant of compatibility and production technology is real
Having showed macromolecular chain in ingredient, the state in balance and stability improves group while reducing internal stress in the case of a high temperature
Structural strength is knitted, the percent thermal shrinkage of finished product conductive coating is reduced, makes it have excellent thermal stability, heat-resisting quantity, waterproof
Impervious and sealing flexibility, substantially prolongs service life of the conductive coating on grounding body, has good safety anti-
The effect of shield and electromagnetic shielding；
(2) conductive coating adhesion of the invention is good, and adhesive strength is high, wear-resisting scratch-resistant, can meet larger machinery punching
Vibrations are hit, are conducted electricity very well, anti-high electrical breakdown, and have excellent physical and chemical stability is salt spray resistance, acid ＆ alkali liquid, oil stain, mould
The corrosion such as bacterium, chemical reagent, weather-proof anti-aging, environmental suitability is strong, and application scenario is wide in range；
(3) conductive coating of the invention is prepared simple and convenient, zero-emission in production process, pollution-free, and preparation and it
Any toxic, noxious volatile gas is not will produce during use afterwards, green safe, compatibility performance is good between raw material, Gu
It is fast to change rate, it is convenient using coating.
Specific implementation mode
The specific implementation mode of the present invention is further described with reference to embodiment, following embodiment is only used for more
Technical scheme of the present invention is clearly demonstrated, and not intended to limit the protection scope of the present invention.
Embodiment 1
A kind of electromagnetic shielding grounded screen conductive coating, including following raw material：Fluorocarbon resin 40kg, Styrene And Chloroalkyl Acrylates
Ester copolymer 10kg, vinylacetate 8kg, epoxychloropropane grafting, copolymerization and modification gelatine 4kg, rosin 1kg, butter of tin
1.5kg, aerosil 3kg, aluminium-coated glass-fibre 2kg, igneous rock powder 1.5kg, ferrocene 0.3kg, anti-settling aluminic acid
Ester ASA 0.6kg, crosslinking agent 1kg, dispersant 1kg, antifoaming agent 0.2kg and retarder thinner 6kg；
Above-mentioned part material nature parameters and selection are as follows：
(1) copolymer in cinnamic acrylic ester：It is 2 by mass ratio:1 the first cinnamic acrylic ester and the second benzene
Ethylene-acrylate forms, and the content of acrylate is 52% in the first cinnamic acrylic ester, melt index 115g/
10min；The content of acrylate is 63% in second cinnamic acrylic ester, melt index 120g/10min.
(2) crosslinking agent：Dipentaerythritol.
(3) dispersant：Lignin.
(4) antifoaming agent：Tributyl phosphate.
(5) retarder thinner：Butyl acetate.
(6) length of aluminium-coated glass-fibre is 100 microns, draw ratio 10:1.
(7) grain size of igneous rock powder is 60 microns.
A kind of preparation method of above-mentioned electromagnetic shielding grounded screen conductive coating, follows the steps below：
(1) it grinds：The above-mentioned raw material weighed is carried out with next stage milled processed
Ⅰ：First aerosil, aluminium-coated glass-fibre, igneous rock powder, ferrocene, dispersant and retarder thinner are conveyed
To milled processed 4min in three-roll grinder, batch mixing A is obtained；
Ⅱ：Remaining other materials are added in three-roll grinder again and are mixed with batch mixing A, co-ground to fineness of materials≤
10μm；
(2) material after grinding is added in reaction kettle after, vacuum degree is 0.085MPa, temperature is 85 DEG C of conditions
Lower mixing 3h.
Embodiment 2
A kind of electromagnetic shielding grounded screen conductive coating, including following raw material：Fluorocarbon resin 45kg, Styrene And Chloroalkyl Acrylates
Ester copolymer 12kg, vinylacetate 10kg, epoxychloropropane grafting, copolymerization and modification gelatine 5kg, rosin 1.5kg, four chlorinations
Tin 1.75kg, aerosil 4kg, aluminium-coated glass-fibre 2.5kg, igneous rock powder 2kg, ferrocene 0.4kg, anti-settling aluminium
Acid esters ASA 0.7kg, crosslinking agent 1.5kg, dispersant 1.25kg, antifoaming agent 0.25kg and retarder thinner 7kg；
Above-mentioned part material nature parameters and selection are as follows：
(1) copolymer in cinnamic acrylic ester：It is 2 by mass ratio:1 the first cinnamic acrylic ester and the second benzene
Ethylene-acrylate forms, and the content of acrylate is in 54%, melt index in first cinnamic acrylic ester
120g/10min；The content of acrylate is 65% in second cinnamic acrylic ester, melt index 125g/
10min。
(2) crosslinking agent：Trimethylolpropane.
(3) dispersant：Sodium tripolyphosphate.
(4) antifoaming agent：Polydimethyl siloxane fluid.
(5) retarder thinner：Butyl acetate, cyclohexanone in mass ratio 1:1 is blended.
(6) length of aluminium-coated glass-fibre is 150 microns, draw ratio 11:1.
(7) grain size of igneous rock powder is 50 microns.
A kind of preparation method of above-mentioned electromagnetic shielding grounded screen conductive coating, follows the steps below：
(1) it grinds：The above-mentioned raw material weighed is carried out with next stage milled processed
Ⅰ：First aerosil, aluminium-coated glass-fibre, igneous rock powder, ferrocene, dispersant and retarder thinner are conveyed
To milled processed 5min in three-roll grinder, batch mixing A is obtained；
Ⅱ：Remaining other materials are added in three-roll grinder again and are mixed with batch mixing A, co-ground to fineness of materials≤
10μm；
(2) material after grinding is added in reaction kettle after, vacuum degree is 0.09MPa, temperature is 88 DEG C of conditions
Lower mixing 2.8h.
Embodiment 3
A kind of electromagnetic shielding grounded screen conductive coating, including following raw material：Fluorocarbon resin 50kg, Styrene And Chloroalkyl Acrylates
Ester copolymer 15kg, vinylacetate 12kg, epoxychloropropane grafting, copolymerization and modification gelatine 6kg, rosin 2kg, butter of tin
2kg, aerosil 5kg, aluminium-coated glass-fibre 3kg, igneous rock powder 2.5kg, ferrocene 0.5kg, anti-settling Aluminate
ASA 0.8kg, crosslinking agent 2kg, dispersant 1.5kg, antifoaming agent 0.3kg and retarder thinner 8kg；
Above-mentioned part material nature parameters and selection are as follows：
(1) copolymer in cinnamic acrylic ester：It is 3 by mass ratio:1 the first cinnamic acrylic ester and the second benzene
Ethylene-acrylate forms, and the content of acrylate is 56% in the first cinnamic acrylic ester, melt index 125g/
10min；The content of acrylate is 67% in second cinnamic acrylic ester, melt index 130g/10min.
(2) crosslinking agent：M-xylene diamine.
(3) dispersant：Calgon.
(4) antifoaming agent：Polydimethyl siloxane fluid.
(5) retarder thinner：Ethyl acetate, acetone in mass ratio 2:1 is blended.
(6) length of aluminium-coated glass-fibre is 200 microns, draw ratio 12:1.
(7) grain size of igneous rock powder is 50 microns.
A kind of preparation method of above-mentioned electromagnetic shielding grounded screen conductive coating, follows the steps below：
(1) it grinds：The above-mentioned raw material weighed is carried out with next stage milled processed
Ⅰ：First aerosil, aluminium-coated glass-fibre, igneous rock powder, ferrocene, dispersant and retarder thinner are conveyed
To milled processed 6min in three-roll grinder, batch mixing A is obtained；
Ⅱ：Remaining other materials are added in three-roll grinder again and are mixed with batch mixing A, co-ground to fineness of materials≤
10μm；
(2) material after grinding is added in reaction kettle after, vacuum degree is 0.095MPa, temperature is 90 DEG C of conditions
Lower mixing 2.5h.
Performance detection
Grounded screen made from above-described embodiment 1-3 is as follows with conductive coating practical application parameter：
1) adhesive strength：≥110N/cm；
2) breakdown voltage strength：≥102KV/mm；
3) coating heatproof section DEG C：[-60,120]；
4) moisture permeable coefficient：≤0.1ng/(m.h.pa)；
5) electromagnet shield effect (10GHz)：≥85dB；
6) acid-alkali salt and accelerated aging test：Coating falls off without blistering.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although with reference to aforementioned reality
Applying example, invention is explained in detail, for those skilled in the art, still can be to aforementioned each implementation
Technical solution recorded in example is modified or equivalent replacement of some of the technical features.All essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (10)
1. a kind of electromagnetic shielding grounded screen conductive coating, which is characterized in that including following raw material by weight：Fluorine carbon tree
40-50 parts of fat, 10-15 parts of copolymer in cinnamic acrylic ester, 8-12 parts of vinylacetate, 4-6 parts of Modify bone glue, rosin
1-2 parts, 1.5-2 parts of butter of tin, 3-5 parts of aerosil, 2-3 parts of aluminium-coated glass-fibre, 1.5-2.5 parts of igneous rock powder,
0.3-0.5 parts of ferrocene, 0.6-0.8 parts of anti-settling Aluminate ASA, 1-2 parts of crosslinking agent, 1-1.5 parts of dispersant, antifoaming agent
0.2-0.3 parts and 6-8 parts of retarder thinner；
The Modify bone glue is epoxychloropropane grafting, copolymerization and modification gelatine；
The copolymer in cinnamic acrylic ester is 2-3 by mass ratio:1 the first cinnamic acrylic ester and the second benzene second
Alkene-acrylate forms, and in 52-56%, melt index is the content of acrylate in first cinnamic acrylic ester
115-125g/10min；In 63-67%, melt index is the content of acrylate in second cinnamic acrylic ester
120-130g/10min。
2. a kind of electromagnetic shielding grounded screen conductive coating according to claim 1, which is characterized in that including pressing weight below
Measure the raw material of part meter：45 parts of fluorocarbon resin, 12 parts of copolymer in cinnamic acrylic ester, 10 parts of vinylacetate, Modify bone glue 5
Part, 1.5 parts of rosin, 1.75 parts of butter of tin, 4 parts of aerosil, 2.5 parts of aluminium-coated glass-fibre, 2 parts of igneous rock powder,
0.4 part of ferrocene, 0.7 part of anti-settling Aluminate ASA, 1.5 parts of crosslinking agent, 1.25 parts of dispersant, 0.25 part of antifoaming agent and dilute
Release 7 parts of solvent.
3. a kind of electromagnetic shielding grounded screen conductive coating according to claim 1, which is characterized in that the styrene-
Acrylate copolymer is 2 by mass ratio:1 the first cinnamic acrylic ester and the second cinnamic acrylic ester form, institute
The content of acrylate in the first cinnamic acrylic ester is stated 54%, melt index 120g/10min；The second benzene second
The content of acrylate is 65% in alkene-acrylate, melt index 125g/10min.
4. a kind of electromagnetic shielding grounded screen conductive coating according to claim 1, which is characterized in that the crosslinking agent is
Any one of trimethylolpropane, dipentaerythritol or m-xylene diamine.
5. a kind of electromagnetic shielding grounded screen conductive coating according to claim 1, which is characterized in that the dispersant is
Any one of sodium tripolyphosphate, calgon or lignin.
6. a kind of electromagnetic shielding grounded screen conductive coating according to claim 1, which is characterized in that the antifoaming agent is
Tributyl phosphate or polydimethyl siloxane fluid.
7. a kind of electromagnetic shielding grounded screen conductive coating according to claim 1, which is characterized in that the retarder thinner
One or more than one kinds of in butyl acetate, cyclohexanone, ethyl acetate, acetone.
8. a kind of electromagnetic shielding grounded screen conductive coating according to claim 7, which is characterized in that the retarder thinner
For butyl acetate, cyclohexanone in mass ratio 1:1 is blended.
9. a kind of electromagnetic shielding grounded screen conductive coating according to claim 1, which is characterized in that the aluminum plating glass
The length of fiber is 100-200 microns, draw ratio 10-12:1；Grain size≤60 micron of igneous rock powder.
10. a kind of preparation method being electromagnetically shielded grounded screen conductive coating according to claim 1-9 any one of them, special
Sign is, includes the following steps：
(1) raw material is weighed by the parts by weight；
(2) it grinds：
Ⅰ：At aerosil, aluminium-coated glass-fibre, igneous rock powder, ferrocene, dispersant and retarder thinner mixed grinding
4-6min is managed, batch mixing A is obtained；
Ⅱ：Remaining other materials are mixed with batch mixing A, co-ground to fineness of materials≤10 μm；
(3) 2.5- is mixed under the conditions of vacuum degree is 0.085-0.095MPa, temperature is 85-90 DEG C in the material after grinding
3h。
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101250357A (en) * | 2008-04-03 | 2008-08-27 | 惠州市长润发涂料有限公司 | Electromagnetic shielding electrically-conducting paint |
| US8921481B2 (en) * | 2010-08-19 | 2014-12-30 | James Nohak PAK | Composition for forming non-flammable coating, and non-flammable coating obtained therefrom |
| CN104263119A (en) * | 2014-10-29 | 2015-01-07 | 国家电网公司 | Anticorrosion conductive coating for grounding grid and preparation method thereof |
| CN105957592A (en) * | 2016-06-30 | 2016-09-21 | 安徽埃克森科技集团有限公司 | Oil-proof cable and preparation method thereof |
-
2018
- 2018-05-04 CN CN201810417758.3A patent/CN108485357A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101250357A (en) * | 2008-04-03 | 2008-08-27 | 惠州市长润发涂料有限公司 | Electromagnetic shielding electrically-conducting paint |
| US8921481B2 (en) * | 2010-08-19 | 2014-12-30 | James Nohak PAK | Composition for forming non-flammable coating, and non-flammable coating obtained therefrom |
| CN104263119A (en) * | 2014-10-29 | 2015-01-07 | 国家电网公司 | Anticorrosion conductive coating for grounding grid and preparation method thereof |
| CN105957592A (en) * | 2016-06-30 | 2016-09-21 | 安徽埃克森科技集团有限公司 | Oil-proof cable and preparation method thereof |
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Application publication date: 20180904 |