CN110760236A - High-thermal-conductivity coating and preparation method thereof - Google Patents
High-thermal-conductivity coating and preparation method thereof Download PDFInfo
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- CN110760236A CN110760236A CN201910981456.3A CN201910981456A CN110760236A CN 110760236 A CN110760236 A CN 110760236A CN 201910981456 A CN201910981456 A CN 201910981456A CN 110760236 A CN110760236 A CN 110760236A
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- conductivity coating
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
- 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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- 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
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
Abstract
The invention discloses a high-thermal-conductivity coating, which comprises the following components in percentage by weight: 18-50% of organic carrier, 15-20% of nano conductive carbon black, 8-15% of graphite powder, 5-15% of auxiliary agent and 15-30% of solvent a; wherein the organic carrier is 100 percent, and comprises the following components in percentage by weight: 35-40% of solvent b, 20-30% of epoxy modified organic silicon resin, 20-30% of bisphenol A epoxy resin, 10-20% of isocyanate resin curing agent and 2-8% of substituted urea curing accelerator. By adopting the formula, the invention obtains bright black flowable slurry, namely the high-thermal-conductivity coating. The high-thermal-conductivity coating can be used at the temperature of 100 ℃ and 800 ℃ for a long time, and has uniform heating temperature, so that power recession cannot occur after long-term use.
Description
Technical Field
The invention relates to the field of electrothermal coatings, in particular to a high-thermal-conductivity coating and a preparation method thereof.
Background
The electrothermal paint widely used in the market at present is a functional paint which takes carbon materials such as carbon black, graphite and the like as conductive agents, is uniformly dispersed in an organic carrier, is simultaneously coated on insulating base materials such as PET, epoxy glass fiber boards, ceramic panels and the like in a coating, silk-screen printing, gravure and other modes, takes a conductive copper strip as two-end electrodes, and applies voltage to two ends of the electrodes so as to stably generate heat. The electrothermal conversion efficiency of the heating coating adopting the carbon-series conductive agent can reach more than 90 percent, and far infrared light with the wavelength of 8-13um can be radiated, so the electrothermal coating is widely applied to the fields of floor heating, seed heating plates, pet heat-insulating pads, heating carpets and the like. However, the common heating carbon-based slurry in the market has the defects of insufficient heating temperature, nonuniform heating, long service time, easy power decline and the like when the heating carbon-based slurry is heated at the working temperature of 40-60 ℃.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The invention aims to provide a high-thermal-conductivity coating and a preparation method thereof, and aims to solve the problems of insufficient heating temperature and nonuniform heating of the conventional electric heating coating.
In order to achieve the purpose, the invention provides the following technical scheme: the high-thermal-conductivity coating comprises the following components in percentage by weight:
wherein the organic carrier is 100 percent, and comprises the following components in percentage by weight:
preferably, the high thermal conductive coating comprises the following components in percentage by weight:
wherein the organic carrier is 100 percent, and comprises the following components in percentage by weight:
wherein the solvent a is a high boiling point solvent and comprises one or more of cyclohexanone, dimethylformamide and N-methylpyrrolidone.
Wherein the solvent b at least comprises one of dimethylformamide and N-methylpyrrolidone.
Wherein the auxiliary agent is selected from one or more of a defoaming agent, a dispersing agent, a rheological agent and a drier;
a preparation method of a high-thermal-conductivity coating comprises the following steps:
step A, according to the proportion, taking a solvent b in a container, placing the solvent b in a water bath at 90 ℃ for heating, and adding 10-20% of isocyanate resin curing agent; 2-8% of substituted urea curing accelerator is dispersed by a dispersion machine at the same time;
step B, after the curing agent solid is dissolved, adding 20-30% of epoxy modified organic silicon resin; 20-30% of bisphenol A epoxy resin, and uniformly dispersing by a dispersion machine to obtain an organic carrier;
step C, putting the prepared organic carrier into another container, adding an auxiliary agent and a solvent a, and uniformly dispersing by using a dispersion machine;
and D, after uniform dispersion, adding the nano conductive carbon black and the graphite powder while slowly dispersing, after pre-dispersing for 15-30min, transferring the formed slurry to a three-roller machine for grinding and dispersing until the fineness of the slurry is less than 10 mu m, and obtaining bright black flowable slurry, namely the high-temperature electric heating coating.
Compared with the prior art, the invention has the following beneficial effects: by adopting the formula, the invention obtains bright black flowable slurry, namely the high-thermal-conductivity coating. The high-thermal-conductivity coating can be used at the temperature of 100 ℃ and 800 ℃ for a long time, and has uniform heating temperature, so that power recession cannot occur after long-term use.
Detailed Description
The technical solutions of the present invention will be described clearly and completely in the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A preparation method of a high thermal conductive coating is used for preparing 100 jin of high thermal conductive coating, and comprises the following steps: step A, preparing an organic carrier, namely taking 14 jin of solvent b in a container by taking 100% of the organic carrier, placing the container in a water bath at 90 ℃ for heating, and adding 4.8 jin of isocyanate resin curing agent; 3.2 jin of substituted urea curing accelerator is dispersed by a dispersion machine at the same time;
step B, after the curing agent solid is dissolved, adding 8 jin of epoxy modified organic silicon resin; 10 jin of bisphenol A type epoxy resin is uniformly dispersed by a dispersion machine to obtain 40 jin of organic carrier;
step C, according to the weight percentage of the raw materials of the high-thermal-conductivity coating, 40 jin of the prepared organic carrier is taken to be put into another container, 10 jin of the auxiliary agent and 15 jin of the solvent are added, and the mixture is uniformly dispersed by a dispersion machine;
and D, after uniform dispersion, adding 20 jin of nano conductive carbon black and 15 jin of graphite powder while slowly dispersing, after pre-dispersing for 15-30min, transferring the formed slurry to a three-roller machine for grinding and dispersing until the fineness of the slurry is less than 10 mu m, and obtaining bright black flowing slurry, namely the high-temperature electrothermal coating.
Example 2
A preparation method of a high-thermal-conductivity coating comprises the following steps: step A, preparing an organic carrier, namely taking 13.3 jin of solvent b in a container by taking 100% of the organic carrier, placing the container in a water bath at 90 ℃ for heating, and adding 4.2 jin of isocyanate resin curing agent; 1.75 jin of substituted urea curing accelerator is dispersed by a dispersion machine at the same time;
step B, after the curing agent solid is dissolved, adding 7 jin of epoxy modified organic silicon resin; 8.75 jin of bisphenol A epoxy resin is uniformly dispersed by a dispersion machine to obtain 35 jin of organic carrier;
step C, according to the weight percentage of the raw materials of the high-thermal-conductivity coating, 35 jin of the prepared organic carrier is taken to be put into another container, 15 jin of the auxiliary agent and 20 jin of the solvent are added, and the mixture is uniformly dispersed by a dispersion machine;
and D, after uniform dispersion, adding 15 jin of nano conductive carbon black and 15 jin of graphite powder while slowly dispersing, after pre-dispersing for 15-30min, transferring the formed slurry to a three-roller machine for grinding and dispersing until the fineness of the slurry is less than 10 mu m, and obtaining bright black flowing slurry, namely the high-temperature electrothermal coating.
Example 3
A preparation method of a high-thermal-conductivity coating comprises the following steps: step A, preparing an organic carrier, namely taking 15.2 jin of solvent b in a container by taking 100% of the organic carrier, placing the container in a water bath at 90 ℃ for heating, and adding 5.2 jin of isocyanate resin curing agent; 0.8 jin of substituted urea curing accelerator is dispersed by a dispersion machine at the same time;
step B, after the curing agent solid is dissolved, 8.8 jin of epoxy modified organic silicon resin is added; 10 jin of bisphenol A type epoxy resin is uniformly dispersed by a dispersion machine to obtain 40 jin of organic carrier;
step C, according to the weight percentage of the raw materials of the high-thermal-conductivity coating, 40 jin of the prepared organic carrier is taken to be put into another container, 12 jin of the auxiliary agent and 20 jin of the solvent are added, and the mixture is uniformly dispersed by a dispersion machine;
and D, after uniform dispersion, adding 18 jin of nano conductive carbon black and 10 jin of graphite powder while slowly dispersing, after pre-dispersing for 15-30min, transferring the formed slurry to a three-roller machine for grinding and dispersing until the fineness of the slurry is less than 10 mu m, and obtaining bright black flowing slurry, namely the high-temperature electrothermal coating.
The performance of the electrothermal coating of the high-thermal-conductivity coating in the embodiment 1-3 is detected, a grid test of a paint film is carried out by referring to the national standard GB/T9286-1998, the adhesive force is measured to be 0-5 grade, and the adhesive force is gradually reduced;
the hardness of the electric heating coating is detected by utilizing a coating hardness pencil measuring method according to the national standard GB/T6737-2006, and the hardness is gradually increased from 9B-8B-7B-6B-5B-4B-3B-2B-HB-F-H-2H-3H-4H-5H-6H-7H-8H-9H;
measuring the volume resistivity of the high-thermal-conductivity coating by referring to the national standard GB/T1410-2006;
and (3) detecting the fire resistance time of the coating according to the method of the national standard GB/T14907-2018.
The comparative example is a conventional electrothermal coating.
According to the experimental data, the high-thermal-conductivity coating has the advantages of strong adhesive force, high hardness and long fire-resistant and high-temperature-resistant time. In example 3, the high thermal conductive coating has the strongest adhesive force, the highest hardness and the longest refractory time, which is the best example, wherein the preparation of 100 jin of high thermal conductive coating is taken as an example, and the coating comprises the following components:
wherein the organic carrier is 100 percent, and comprises the following components:
although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The high-thermal-conductivity coating is characterized in that: the coating comprises the following components in percentage by weight:
wherein the organic carrier is 100 percent, and comprises the following components in percentage by weight:
2. the high thermal conductivity coating according to claim 1, wherein: the coating comprises the following components in percentage by weight:
wherein the organic carrier is 100 percent, and comprises the following components in percentage by weight:
3. the high thermal conductivity coating according to claim, wherein: the solvent a is a high-boiling point solvent and comprises one or more of cyclohexanone, dimethylformamide and N-methylpyrrolidone.
4. The high thermal conductivity coating according to claim, wherein: the solvent b at least comprises one of dimethylformamide and N-methylpyrrolidone.
5. The high thermal conductivity coating according to claim, wherein: the auxiliary agent is selected from one or more of a defoaming agent, a dispersing agent, a rheological agent and a drier.
6. A preparation method of a high-thermal-conductivity coating is characterized by comprising the following steps: the specific method comprises the following steps: step A, according to the proportion, taking a solvent b in a container, placing the solvent b in a water bath at 90 ℃ for heating, and adding 10-20% of isocyanate resin curing agent; 2-8% of substituted urea curing accelerator is dispersed by a dispersion machine at the same time;
step B, after the curing agent solid is dissolved, adding 20-30% of epoxy modified organic silicon resin; 20-30% of bisphenol A epoxy resin, and uniformly dispersing by a dispersion machine to obtain an organic carrier;
step C, putting the prepared organic carrier into another container, adding an auxiliary agent and a solvent a, and uniformly dispersing by using a dispersion machine;
and D, after uniform dispersion, adding the nano conductive carbon black and the graphite powder while slowly dispersing, after pre-dispersing for 15-30min, transferring the formed slurry to a three-roller machine for grinding and dispersing until the fineness of the slurry is less than 10 mu m, and obtaining bright black flowable slurry, namely the high-temperature electric heating coating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910981456.3A CN110760236A (en) | 2019-10-16 | 2019-10-16 | High-thermal-conductivity coating and preparation method thereof |
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| CN201910981456.3A CN110760236A (en) | 2019-10-16 | 2019-10-16 | High-thermal-conductivity coating and preparation method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148551A (en) * | 2007-11-01 | 2008-03-26 | 湖南大学 | Carbon series electric heating coating |
| CN101402720A (en) * | 2008-11-14 | 2009-04-08 | 天津大学 | Process for producing cold curing watersoluble solidifying agent of epoxy resin |
| CN106243836A (en) * | 2016-08-15 | 2016-12-21 | 青岛德通纳米技术有限公司 | A kind of graphene conductive carbon slurry and preparation method thereof |
| CN107502150A (en) * | 2017-09-28 | 2017-12-22 | 深圳市兴鸿昌电器有限公司 | A kind of high-temp. electro-heating coating and preparation method thereof |
| CN108003701A (en) * | 2017-12-16 | 2018-05-08 | 深圳埃法智能科技有限公司 | A kind of far infrared heat conduction slurry and its preparation method and application |
| CN108084823A (en) * | 2017-12-18 | 2018-05-29 | 中南大学 | A kind of electric-heating coatings and its preparation method and application |
-
2019
- 2019-10-16 CN CN201910981456.3A patent/CN110760236A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148551A (en) * | 2007-11-01 | 2008-03-26 | 湖南大学 | Carbon series electric heating coating |
| CN101402720A (en) * | 2008-11-14 | 2009-04-08 | 天津大学 | Process for producing cold curing watersoluble solidifying agent of epoxy resin |
| CN106243836A (en) * | 2016-08-15 | 2016-12-21 | 青岛德通纳米技术有限公司 | A kind of graphene conductive carbon slurry and preparation method thereof |
| CN107502150A (en) * | 2017-09-28 | 2017-12-22 | 深圳市兴鸿昌电器有限公司 | A kind of high-temp. electro-heating coating and preparation method thereof |
| CN108003701A (en) * | 2017-12-16 | 2018-05-08 | 深圳埃法智能科技有限公司 | A kind of far infrared heat conduction slurry and its preparation method and application |
| CN108084823A (en) * | 2017-12-18 | 2018-05-29 | 中南大学 | A kind of electric-heating coatings and its preparation method and application |
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Application publication date: 20200207 |