CN107099175B - High-temperature-resistant and anti-corrosion type electric heating belt coating and coating method thereof - Google Patents
High-temperature-resistant and anti-corrosion type electric heating belt coating and coating method thereof Download PDFInfo
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- 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
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- 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
- C09D5/08—Anti-corrosive paints
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- 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
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
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- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
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- C08K3/00—Use of inorganic substances as compounding ingredients
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- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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Abstract
A high-temperature-resistant anticorrosive electric heating tape coating and a coating method thereof are disclosed, wherein the coating is composed of the following raw materials in parts by weight: 100-135 parts of glue, 25-27 parts of modified phenolic resin, 35-38 parts of sodium silicate, 20-35 parts of modified inorganic filler, 5-10 parts of nano silicon carbide, 5-10 parts of nano boron nitride and 10-15 parts of silicon dioxide; the coating method comprises the following steps: the coating is contained in a spray gun kettle, and is repeatedly sprayed on a plurality of layers of electric heating bands, and then is cured for 24-48 h at 200 ℃. The coating prepared by the invention can be sprayed by a spray gun, and compared with the existing manual brush coating, the uniformity of the coating is improved; the coating has good binding force at high temperature and does not fall off; the electrical insulation property is good at high temperature, and the breakdown is avoided within 1000V-hour; the thermal conductivity is good, and the thermal conductivity can reach 20 w/m.k; the cost is low.
Description
Technical Field
The invention relates to the technical field of electric heating tapes, in particular to a high-temperature-resistant anticorrosive electric heating tape coating and a coating method thereof.
Background
The electric heating belt is an electric heating element of a self-limiting heating belt, a core belt made of semiconductor PTC material with positive temperature coefficient is evenly extruded between two parallel metal buses, and the electric heating belt can be widely applied to heat preservation, heat tracing, heating and the like of pipe tanks, pump valves, instruments, tanks, house geothermal heat and the like for storing and conveying media such as oil, water, gas and the like.
The electric heating belt is generally divided into a parallel connection type and a series connection type according to the structure, and is divided into a self-limiting type and a constant power type according to the heating value. The wire core of the self-limiting electric heating belt is a very complex high molecular polymer, and a semiconductor wire core is made after specific chemical change and physical treatment, and two wires form a heating circuit which keeps continuous and parallel and can change along with the change of environmental temperature. The constant power electric heating belt is formed by winding an electric heating wire on the surface of a power bus which is two or two parallel insulated copper wires, and the heating value of the electric heating wire per unit length is constant. The self-limiting electric heating belt and the constant-power electric heating belt are both provided with multiple layers of insulation.
During the use process of the electric heating belt, accidents caused by high-temperature ignition are the biggest potential safety hazards, and the reasons include the following aspects: because the service life is too long, the environment is polluted by sundries, the insulation is sealed and baked at high temperature for a long time, or the insulation is affected by moisture and corrosion, the insulation aging and deterioration lose the insulation capability, and the short circuit and the fire are caused; or the electric heating tape is exposed outdoors, and the insulation of the electric heating tape can be broken down to form instant short circuit due to overvoltage action such as lightning stroke; and fire and even explosion can be caused by the fact that the lightning discharge current is extremely large and the thermal effect similar to the short-circuit current but stronger than the short-circuit current exists. In order to prevent the problem that the electric heating tape is oxidized and burned off at a high temperature, a layer of glue is generally coated on the existing electric heating tape, but the electric heating tape has the following defects: the paint can not be sprayed and can only be brushed; poor binding force at high temperature; poor thermal conductivity at high temperatures; electrical insulation is not good; the cost is high.
Disclosure of Invention
The invention provides a high-temperature-resistant anticorrosive electric heating tape coating and a coating method thereof, aiming at overcoming the defects in the prior art.
The technical scheme adopted by the invention for solving the problems is as follows: the high-temperature-resistant anticorrosive electric heating tape coating comprises the following raw materials in parts by weight: 100-135 parts of glue, 25-27 parts of modified phenolic resin, 35-38 parts of sodium silicate, 20-35 parts of modified inorganic filler, 5-10 parts of nano silicon carbide, 5-10 parts of nano boron nitride and 10-15 parts of silicon dioxide.
A coating method of a high-temperature-resistant anticorrosive electric heating belt coating comprises the following steps:
weighing organic silicon resin, adding an inorganic filler which is 1.5-2.0 times of the weight of the organic silicon resin into the organic silicon resin, stirring to obtain a mixture, adding a nano modifier which is 1-3% of the total weight of the mixture, adding deionized water which is 1.5-3 times of the weight of the mixture, uniformly stirring, ball-milling, filtering and drying to obtain powder, placing the powder into a reaction kettle, adding ethanol, glycerol and a surfactant, heating the reaction kettle to 70-85 ℃ under 1.2-1.5 atmospheric pressures, reacting for 4-5 hours, stopping heating, standing for 2-3 hours, taking out the material, washing with deionized water, and drying to obtain a modified inorganic filler for later use;
step two, according to the step 1: 4: 3, weighing nano microcapsule powder, phenolic resin and absolute ethyl alcohol, mixing, performing ultrasonic dispersion for 30-35 min, performing suction filtration, stopping suction filtration when no ethanol drops drip, taking out a filtrate, drying in an oven, and naturally cooling to room temperature to prepare modified phenolic resin for later use;
step three, weighing the raw materials according to the weight parts, uniformly mixing glue and sodium silicate, then sequentially adding the modified phenolic resin, the nano silicon carbide and the nano boron nitride prepared in the step two, uniformly mixing, then adding the modified inorganic filler and the silicon dioxide prepared in the step one, mixing and stirring for 30-50 min to prepare a coating, putting the coating in a spray gun kettle, repeatedly spraying a plurality of layers on an electric heating belt, and then curing for 24-48 h at 200 ℃.
The inorganic filler in the first step is composed of magnesium oxide, zinc oxide and aluminum oxide, wherein the weight ratio of the magnesium oxide to the zinc oxide to the aluminum oxide is 10-20: 5-7: 5 to 8.
If the electric heating tape is damaged by stretching and the like, the capsule powder is broken, the phenolic resin serving as the core material of the electric heating tape is coupled with the glue, the binding force between the coating and the electric heating tape is enhanced, the coating is prevented from being peeled off, and the short circuit phenomenon caused by the damage of the insulating layer of the electric heating tape can be further prevented to the maximum extent.
The magnesium oxide is added, so that the stress at definite elongation of the glue can be increased, the heat-resistant and ageing-resistant performance is improved, and the glue has higher plasticity and better storage stability; the zinc oxide can improve the heat resistance and aging resistance, and the magnesium oxide and the zinc oxide are used simultaneously to improve the crosslinking strength of the coating. The raw materials of the invention take alumina, magnesia and zinc oxide as auxiliary agents, after being acted by high temperature, the raw materials can decompose nontoxic inert gas and decompose by heating, phase change absorbs consumed heat, the surface layer can gradually form a carbonization layer to further form an expanded foaming layer, and the flame retardant main body is separated from a heat source, thereby delaying or stopping the decomposition of polymers, effectively reducing the heat conduction and reducing the temperature rising rate of the flame retardant main body.
The nano boron nitride, the modified inorganic filler and the nano silicon carbide can be uniformly dispersed in a resin matrix and glue, so that the surface of the coated coating presents lower surface energy, and water vapor and the like can be in a non-wetting state with the surface of the coated coatingAnd the phenomenon of insulation aging and deterioration caused by the corrosion of the electric heating tape due to humidity and the like is avoided. Meanwhile, the high-temperature insulation property of boron nitride is good, and the temperature of the boron nitride is 10 ℃ at 25 DEG C14Omega cm, 2000 ℃ can reach 103Ω·cm。
The coating prepared by the invention contains Si-O bonds, has high polarity and bond energy, is not easy to break at high temperature, and improves the thermal stability of the coating. Simultaneously, the silica bond can be strengthened to the sodium silicate that adds, and sodium silicate is dispersed sheet structure before not reaching its melting point, and under the high temperature condition near its melting point, the sodium silicate fusion film-forming plays the effect of high temperature protection, has certain anticorrosive.
The invention uses sodium silicate and metal oxide as film forming substances, realizes film forming by inorganic high molecular polymer formed by water evaporation and intermolecular silicon-oxygen bond combination, has good stability to light and heat, and has good heat resistance, aging resistance and adhesive force.
The coating prepared by the invention can be sprayed by a spray gun, and compared with the existing manual brush coating, the uniformity of the coating is improved; the coating has good binding force at high temperature and does not fall off; the electrical insulation property is good at high temperature, and the breakdown is avoided within 1000V-hour; the thermal conductivity is good, and the thermal conductivity can reach 20 w/m.k; the cost is low.
Detailed Description
The present invention is further described with reference to specific examples to enable those skilled in the art to better understand the present invention and to practice the same, but the examples are not intended to limit the present invention.
The high-temperature-resistant anticorrosive electric heating tape coating comprises the following raw materials in parts by weight: 100-135 parts of glue, 25-27 parts of modified phenolic resin, 35-38 parts of sodium silicate, 20-35 parts of modified inorganic filler, 5-10 parts of nano silicon carbide, 5-10 parts of nano boron nitride and 10-15 parts of silicon dioxide.
Example 1
A coating method of a high-temperature-resistant anticorrosive electric heating belt coating comprises the following steps:
weighing organic silicon resin, adding inorganic filler with the weight 2.0 times of that of the organic silicon resin, stirring to obtain a mixture, then adding a nano modifier with the weight 2.5% of the total weight of the mixture, adding deionized water with the weight 3 times of that of the mixture, uniformly stirring, ball-milling, filtering and drying to obtain powder, placing the powder into a reaction kettle, adding ethanol, glycerol and a surfactant, heating the reaction kettle to 85 ℃ under 1.3 atmospheric pressures, reacting for 4 hours, stopping heating, standing for 2.5 hours, taking out the material, washing with deionized water, and drying to obtain the modified inorganic filler for later use; the inorganic filler is composed of magnesium oxide, zinc oxide and aluminum oxide, wherein the weight ratio of the magnesium oxide to the zinc oxide to the aluminum oxide is 15: 6: 7.
step two, according to the step 1: 4: 3, weighing nano microcapsule powder, phenolic resin and absolute ethyl alcohol, mixing, performing ultrasonic dispersion for 35min, performing suction filtration, stopping suction filtration when no more ethyl alcohol drops drip, taking out a filtrate, drying in an oven, and naturally cooling to room temperature to prepare modified phenolic resin for later use;
step three, weighing the following raw materials in parts by weight: 125 parts of glue, 26 parts of modified phenolic resin prepared in the step two, 37 parts of sodium silicate, 30 parts of modified inorganic filler prepared in the step one, 8 parts of nano silicon carbide, 7 parts of nano boron nitride and 12 parts of silicon dioxide; and (2) uniformly mixing the weighed glue and sodium silicate, then sequentially adding the modified phenolic resin prepared in the step two, nano silicon carbide and nano boron nitride, uniformly mixing, then adding the modified inorganic filler and silicon dioxide prepared in the step one, mixing and stirring for 30min to prepare a coating, placing the coating in a spray gun kettle, spraying a layer of the coating on an electric heating belt, and then curing for 24h at 200 ℃.
Example 2
A coating method of a high-temperature-resistant anticorrosive electric heating belt coating comprises the following steps:
weighing organic silicon resin, adding inorganic filler with the weight 1.7 times that of the organic silicon resin into the organic silicon resin, stirring to obtain a mixture, then adding a nano modifier with the weight 1% of the total weight of the mixture, adding deionized water with the weight 2.0 times that of the mixture, uniformly stirring, ball-milling, filtering and drying to obtain powder, placing the powder into a reaction kettle, adding ethanol, glycerol and a surfactant, heating the reaction kettle to 75 ℃ under 1.5 atmospheric pressures, reacting for 4.5 hours, stopping heating, standing for 2 hours, taking out the material, washing with deionized water, and drying to obtain the modified inorganic filler for later use; the inorganic filler is composed of magnesium oxide, zinc oxide and aluminum oxide, wherein the weight ratio of the magnesium oxide to the zinc oxide to the aluminum oxide is 10: 5: 5.
step two, according to the step 1: 4: 3, weighing nano microcapsule powder, phenolic resin and absolute ethyl alcohol, mixing, performing ultrasonic dispersion for 30min, performing suction filtration, stopping suction filtration when no more ethyl alcohol drops drip, taking out a filtrate, drying in an oven, and naturally cooling to room temperature to prepare modified phenolic resin for later use;
step three, weighing the following raw materials in parts by weight: 100 parts of glue, 25 parts of modified phenolic resin prepared in the second step, 35 parts of sodium silicate, 20 parts of modified inorganic filler prepared in the first step, 5 parts of nano silicon carbide, 5 parts of nano boron nitride and 10 parts of silicon dioxide; and (2) uniformly mixing the weighed glue and sodium silicate, then sequentially adding the modified phenolic resin, the nano silicon carbide and the nano boron nitride prepared in the step two, uniformly mixing, then adding the modified inorganic filler and the silicon dioxide prepared in the step one, mixing and stirring for 45min to prepare a coating, putting the coating in a spray gun kettle, repeatedly spraying two layers on an electric heating belt, and then curing for 24h at 200 ℃.
Example 3
A coating method of a high-temperature-resistant anticorrosive electric heating belt coating comprises the following steps:
weighing organic silicon resin, adding inorganic filler with the weight 1.5 times that of the organic silicon resin into the organic silicon resin, stirring to obtain a mixture, then adding a nano modifier with the weight 3% of the total weight of the mixture, adding deionized water with the weight 1.5 times that of the mixture, uniformly stirring, ball-milling, filtering and drying to obtain powder, placing the powder into a reaction kettle, adding ethanol, glycerol and a surfactant, heating the reaction kettle to 70 ℃ under 1.2 atmospheric pressures, reacting for 5 hours, stopping heating, standing for 3 hours, taking out the material, washing with deionized water, and drying to obtain the modified inorganic filler for later use; the inorganic filler is composed of magnesium oxide, zinc oxide and aluminum oxide, wherein the weight ratio of the magnesium oxide to the zinc oxide to the aluminum oxide is 20: 7: 8.
step two, according to the step 1: 4: 3, weighing nano microcapsule powder, phenolic resin and absolute ethyl alcohol, mixing, performing ultrasonic dispersion for 35min, performing suction filtration, stopping suction filtration when no more ethyl alcohol drops drip, taking out a filtrate, drying in an oven, and naturally cooling to room temperature to prepare modified phenolic resin for later use;
step three, weighing the following raw materials in parts by weight: 135 parts of glue, 27 parts of modified phenolic resin prepared in the second step, 38 parts of sodium silicate, 35 parts of modified inorganic filler prepared in the first step, 10 parts of nano silicon carbide, 10 parts of nano boron nitride and 15 parts of silicon dioxide; and (2) uniformly mixing the weighed glue and sodium silicate, then sequentially adding the modified phenolic resin, the nano silicon carbide and the nano boron nitride prepared in the step two, uniformly mixing, then adding the modified inorganic filler and the silicon dioxide prepared in the step one, mixing and stirring for 50min to prepare a coating, containing the coating in a spray gun kettle, repeatedly spraying at least three layers on an electric heating belt, and then curing for 48h at 200 ℃.
The coating of the invention has the heat resistance of the organic silicon resin and the chemical resistance of the phenolic resin. The added aluminum oxide can be fused with silicon dioxide to generate a Si-O-Al alloy layer, so that the binding force of the coating and the electric heating belt substrate is improved.
When the electric heating tape coated with the coating in the embodiment 1-3 is immersed in water, an ultraviolet aging test is carried out for 120 days, and the foaming, falling and cracking conditions of the electric heating tape after the test are observed, so that the electric heating tape is free of any foaming, falling and cracking phenomena.
On the electric heating tape coated with the coating in the embodiments 1-3, 6mol/L hydrochloric acid solution and 40% sodium hydroxide solution are respectively dripped by a dropper into different positions, and the coating is observed after 5min and 5h, and no phenomena of light loss, bubbling, falling off and yellowing are found.
Claims (3)
1. The high-temperature-resistant and anti-corrosion type electric heating tape coating is characterized in that: the composite material is prepared from the following raw materials in parts by weight: 100-135 parts of glue, 25-27 parts of modified phenolic resin, 35-38 parts of sodium silicate, 20-35 parts of modified inorganic filler, 5-10 parts of nano silicon carbide, 5-10 parts of nano boron nitride and 10-15 parts of silicon dioxide;
wherein the preparation of the modified inorganic filler comprises:
weighing organic silicon resin, adding inorganic filler with the weight 1.5-2.0 times of that of the organic silicon resin, stirring to obtain a mixture, adding a nano modifier with the weight 1-3% of the total weight of the mixture, adding deionized water with the weight 1.5-3 times of that of the mixture, uniformly stirring, ball-milling, filtering and drying to obtain powder, placing the powder into a reaction kettle, adding ethanol, glycerol and a surfactant, heating the reaction kettle to 70-85 ℃ under 1.2-1.5 atmospheric pressures, reacting for 4-5 hours, stopping heating, standing for 2-3 hours, taking out the material, washing with deionized water, and drying to obtain the modified inorganic filler;
the inorganic filler consists of magnesium oxide, zinc oxide and aluminum oxide, and the weight ratio of the magnesium oxide to the zinc oxide to the aluminum oxide is 10-20: 5-7: 5-8;
the preparation of the modified phenolic resin comprises the following steps:
weighing nano microcapsule powder, phenolic resin and absolute ethyl alcohol according to the weight ratio of 1: 4: 3, mixing, performing ultrasonic dispersion for 30-35 min, performing suction filtration, stopping suction filtration when no ethanol drops drop, taking out a filtrate, drying in an oven, and naturally cooling to room temperature to obtain the modified phenolic resin.
2. The method for applying the high-temperature-resistant and corrosion-resistant electric heating belt coating as claimed in claim 1, which comprises the following steps:
weighing organic silicon resin, adding an inorganic filler which is 1.5-2.0 times of the weight of the organic silicon resin into the organic silicon resin, stirring to obtain a mixture, adding a nano modifier which is 1-3% of the total weight of the mixture, adding deionized water which is 1.5-3 times of the weight of the mixture, uniformly stirring, ball-milling, filtering and drying to obtain powder, placing the powder into a reaction kettle, adding ethanol, glycerol and a surfactant, heating the reaction kettle to 70-85 ℃ under 1.2-1.5 atmospheric pressures, reacting for 4-5 hours, stopping heating, standing for 2-3 hours, taking out the material, washing with deionized water, and drying to obtain a modified inorganic filler for later use;
step two, weighing nano microcapsule powder, phenolic resin and absolute ethyl alcohol according to the weight ratio of 1: 4: 3, mixing, performing ultrasonic dispersion for 30-35 min, performing suction filtration, stopping suction filtration when no ethanol drops drip, taking out a filtrate, drying in an oven, and naturally cooling to room temperature to prepare modified phenolic resin for later use;
step three, weighing the raw materials according to the weight part of claim 1, uniformly mixing glue and sodium silicate, then sequentially adding the modified phenolic resin, the nano silicon carbide and the nano boron nitride prepared in the step two, uniformly mixing, then adding the modified inorganic filler and the silicon dioxide prepared in the step one, mixing and stirring for 30-50 min to prepare a coating, filling the coating in a spray gun kettle, repeatedly spraying a plurality of layers of the coating on an electric heating belt, and then curing for 24-48 h at 200 ℃.
3. The coating method of the high-temperature-resistant and corrosion-resistant electric heating belt coating as claimed in claim 2, characterized in that: the inorganic filler in the first step consists of magnesium oxide, zinc oxide and aluminum oxide, wherein the weight ratio of the magnesium oxide to the zinc oxide to the aluminum oxide is 10-20: 5-7: 5-8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710386853.7A CN107099175B (en) | 2017-05-26 | 2017-05-26 | High-temperature-resistant and anti-corrosion type electric heating belt coating and coating method thereof |
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| CN201710386853.7A CN107099175B (en) | 2017-05-26 | 2017-05-26 | High-temperature-resistant and anti-corrosion type electric heating belt coating and coating method thereof |
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| CN107099175B true CN107099175B (en) | 2020-10-09 |
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| CN108696623A (en) * | 2018-08-01 | 2018-10-23 | 南通理工学院 | A kind of call maintenance instrument |
| CN114369414A (en) * | 2021-12-10 | 2022-04-19 | 浙江亚欣包装材料有限公司 | Plate seam adhesive tape and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1052877A (en) * | 1991-02-04 | 1991-07-10 | 中国科学院西安光学精密机械研究所 | High temperature resistant insulating composite coating |
| CN103881426A (en) * | 2013-06-07 | 2014-06-25 | 赵志海 | High-temperature-resistant heat insulation coating |
| CN105368309A (en) * | 2015-11-17 | 2016-03-02 | 国网河南省电力公司周口供电公司 | High temperature resistant and wear resistant ultrahigh voltage insulation coating and preparation method thereof |
| CN105885343A (en) * | 2016-05-19 | 2016-08-24 | 东南大学 | Heat-resistant composite material and preparation method thereof |
-
2017
- 2017-05-26 CN CN201710386853.7A patent/CN107099175B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1052877A (en) * | 1991-02-04 | 1991-07-10 | 中国科学院西安光学精密机械研究所 | High temperature resistant insulating composite coating |
| CN103881426A (en) * | 2013-06-07 | 2014-06-25 | 赵志海 | High-temperature-resistant heat insulation coating |
| CN105368309A (en) * | 2015-11-17 | 2016-03-02 | 国网河南省电力公司周口供电公司 | High temperature resistant and wear resistant ultrahigh voltage insulation coating and preparation method thereof |
| CN105885343A (en) * | 2016-05-19 | 2016-08-24 | 东南大学 | Heat-resistant composite material and preparation method thereof |
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