CN117701146A - Water-based single-component high-temperature-resistant strippable coating and preparation method thereof - Google Patents
Water-based single-component high-temperature-resistant strippable coating and preparation method thereof Download PDFInfo
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- CN117701146A CN117701146A CN202311791654.6A CN202311791654A CN117701146A CN 117701146 A CN117701146 A CN 117701146A CN 202311791654 A CN202311791654 A CN 202311791654A CN 117701146 A CN117701146 A CN 117701146A
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- 238000000576 coating method Methods 0.000 title claims abstract description 61
- 239000011248 coating agent Substances 0.000 title claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 8
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 51
- 239000011521 glass Substances 0.000 claims abstract description 24
- 239000000919 ceramic Substances 0.000 claims abstract description 20
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 12
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 11
- 238000002844 melting Methods 0.000 claims abstract description 9
- 239000003973 paint Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 239000011259 mixed solution Substances 0.000 claims description 9
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 8
- 238000000498 ball milling Methods 0.000 claims description 7
- 230000002378 acidificating effect Effects 0.000 claims description 6
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 5
- 230000009477 glass transition Effects 0.000 claims description 5
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 claims description 5
- 239000002202 Polyethylene glycol Substances 0.000 claims description 4
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 4
- YYLGKUPAFFKGRQ-UHFFFAOYSA-N dimethyldiethoxysilane Chemical compound CCO[Si](C)(C)OCC YYLGKUPAFFKGRQ-UHFFFAOYSA-N 0.000 claims description 4
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 4
- 229920001223 polyethylene glycol Polymers 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 claims description 4
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 claims description 4
- JJQZDUKDJDQPMQ-UHFFFAOYSA-N dimethoxy(dimethyl)silane Chemical compound CO[Si](C)(C)OC JJQZDUKDJDQPMQ-UHFFFAOYSA-N 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 3
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 claims description 3
- 235000019333 sodium laurylsulphate Nutrition 0.000 claims description 3
- 229940048086 sodium pyrophosphate Drugs 0.000 claims description 3
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 3
- 235000019818 tetrasodium diphosphate Nutrition 0.000 claims description 3
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 3
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 claims description 3
- VCZQFJFZMMALHB-UHFFFAOYSA-N tetraethylsilane Chemical compound CC[Si](CC)(CC)CC VCZQFJFZMMALHB-UHFFFAOYSA-N 0.000 claims description 2
- 239000000758 substrate Substances 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000007751 thermal spraying Methods 0.000 description 11
- 239000000945 filler Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000011230 binding agent Substances 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 125000000524 functional group Chemical group 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000027455 binding Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
- 239000000156 glass melt Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004017 vitrification Methods 0.000 description 1
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- Paints Or Removers (AREA)
Abstract
The invention discloses a water-based single-component high-temperature resistant strippable coating and a preparation method thereof, wherein the coating comprises, by weight, 1-8 parts of silicate, 1-8 parts of a silane coupling agent, 1-6 parts of ceramic powder, 1-6 parts of low-melting glass powder, 0.1-1 part of silica sol and 0.1-0.5 part of an auxiliary agent. Compared with the common organic paint, the single-component inorganic paint provided by the invention has higher use temperature, and the coating is self-peeled off through the stress effect, so that temporary protection is provided for a substrate at a higher temperature, or the coating is quickly peeled off after being damaged, and favorable conditions are provided for repairing the coating again.
Description
Technical Field
The invention belongs to the technical field of inorganic coatings, and particularly relates to a water-based single-component high-temperature-resistant strippable coating and a preparation method thereof.
Background
Thermal spraying is a method of forming a coating by heating a spray material to a molten or semi-molten state using a heat source and spray depositing the spray material onto a pretreated substrate surface at a certain rate. Because the temperature range of the heat source is very wide, the coating material which can be sprayed almost comprises all solid engineering materials such as metal, alloy, ceramic, plastic, composite materials composed of the metal, the alloy, the ceramic, the plastic and the like, and can endow various functional surfaces such as wear resistance, corrosion resistance, high temperature resistance, oxidation resistance, insulation, heat insulation, biocompatibility, infrared absorption and the like to a substrate.
In the actual spraying process, the surface of the substrate is usually provided with the surface to be sprayed with the coating and the surface not to be sprayed with the coating at the same time, the surface not to be sprayed is required to be shielded and protected, the surface not to be sprayed in the spraying process is prevented from being polluted by the coating material, and the shielding object is removed after the spraying is finished. Common methods include adhesive self-adhesive tape application, peelable coating application, and the like. The self-adhesive tape and the strippable coating are usually made of organic polymer materials, so that the high temperature resistance of the self-adhesive tape is limited. In the thermal spraying process, the shielding object fails under the action of high temperature, and the phenomena of falling off, burning, carbonization pollution and the like appear.
Disclosure of Invention
In view of the above, the invention discloses and provides a water-based single-component high-temperature resistant strippable coating and a preparation method thereof, so as to improve the high-temperature adaptability of a thermal spraying substrate and improve the thermal spraying efficiency.
The technical scheme of the invention is that the aqueous single-component high-temperature resistant strippable coating comprises, by weight, 1-8 parts of silicate, 1-8 parts of silane coupling agent, 1-6 parts of ceramic powder, 1-6 parts of low-melting glass powder, 0.1-1 part of silica sol and 0.1-0.5 part of auxiliary agent.
Preferably, the silicate is one or more of tetramethyl orthosilicate, tetraethyl orthosilicate and silicon-40.
Preferably, the silane coupling agent is one or more of methyltrimethoxysilane, dimethyldimethoxysilane, methyltriethoxysilane, dimethyldiethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane and phenyltrimethoxysilane.
4. The aqueous single-component high-temperature-resistant strippable coating according to claim 1, wherein the ceramic powder is one or more of ceramic powder, alumina powder, zirconia powder and silica powder.
Preferably, the glass powder with a low expansion coefficient has a glass transition temperature of 300 to 600 ℃.
Preferably, the silica sol is an acidic silica sol, and the ph value is 2-4.
Preferably, the auxiliary agent is one or more of sodium dodecyl sulfate, sodium tripolyphosphate, sodium pyrophosphate and polyethylene glycol.
The invention also provides a method for preparing the aqueous single-component high-temperature-resistant strippable coating, which comprises the following steps:
step 1: according to the weight portions, fully and uniformly stirring and mixing silicate, silane coupling agent and silica sol, wherein the stirring speed is 200-400r/min, and the stirring time is 30-60min to obtain a mixed solution;
step 2: according to the weight portions, the ceramic powder, the low-melting glass powder, the auxiliary agent and the mixed solution are mixed by ball milling, the dispersion is uniform, the ball milling speed is 30-80r/min, and the time is 120-240min, so that the high-temperature resistant strippable coating is obtained.
The invention provides a water-based single-component high-temperature-resistant strippable coating and a preparation method thereof, wherein the coating can protect the parts which are forbidden to be sprayed in the thermal spraying process of a metal matrix and prevent the parts from being polluted by the thermal spraying coating. After the spraying is finished, the coating can be peeled off by itself. The coating has the advantages of high temperature resistance, no pollution, simple coating preparation process and the like, and can greatly solve the shielding protection problem of the base material in a high-temperature environment in the metal thermal spraying process.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure of the invention as claimed.
Detailed Description
Exemplary embodiments will be described in detail herein. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of systems consistent with aspects of the invention as detailed in the accompanying claims.
Aiming at the shielding protection problem of a metal matrix in the selective thermal spraying process, the embodiment provides a high-temperature-resistant strippable coating, and the aqueous single-component high-temperature-resistant strippable coating comprises the following specific raw materials in parts by weight:
1-8 parts of silicate, 1-8 parts of silane coupling agent, 1-6 parts of ceramic powder, 1-6 parts of low-melting glass powder, 0.1-1 part of silica sol and 0.1-0.5 part of auxiliary agent
The silicate is tetramethyl orthosilicate, tetraethyl orthosilicate, silicon-40 and the like, and comprises one or a mixture of more than one of the tetramethyl orthosilicate, the tetraethyl orthosilicate, the silicon-40 and the like.
The silane coupling agent is methyltrimethoxysilane, dimethyldimethoxysilane, methyltriethoxysilane, dimethyldiethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, phenyltrimethoxysilane, and the like, and comprises one or a mixture of more than one of the methyltrimethoxysilane, dimethyldiethoxysilane, vinyltriethoxysilane, phenyltrimethoxysilane, and the like.
The ceramic powder is ceramic powder, alumina powder, zirconia powder, silica powder and the like, and comprises one or a mixture of more of the ceramic powder, the alumina powder, the zirconia powder, the silica powder and the like. The ceramic powder is natural mineral ceramic powder such as quartz powder, feldspar powder, etc
The low-melting-point glass powder is glass powder with a glass transition temperature of 300-600 ℃ and a low expansion coefficient, and the low expansion coefficient is less than 5 x 10 < -6 >/DEG C; the silica sol is acidic silica sol, and the ph value is 2-4.
The auxiliary agent is one or more of sodium dodecyl sulfate, sodium tripolyphosphate, sodium pyrophosphate, polyethylene glycol and the like.
The method for preparing the aqueous single-component high-temperature-resistant strippable coating comprises the following steps:
1. the silicate, the silane coupling agent and the silica sol are fully and uniformly stirred and mixed according to the weight portions, the stirring speed is 200-400r/min, and the stirring time is 30-60min, so as to obtain a mixed solution
2. According to the weight portions, the ceramic powder, the low-melting glass powder, the auxiliary agent and the mixed solution are ball-milled and mixed, the dispersion is uniform, the ball milling speed is 30-80r/min, and the time is 120-240min, thus obtaining the high-temperature resistant strippable coating
3. The prepared coating is stored in a sealing way, and is coated on the surface of a matrix according to the requirement when in use, and is dried and cured at room temperature.
According to the water-based single-component high-temperature-resistant strippable coating, silicate and a silane coupling agent are used for preparing a coating binder under the catalysis of acidic silica sol, and the coating binder can bond a wrapped filler on the surface of a substrate to provide the bonding performance of the coating in a low-temperature stage. And three components: the structure of the acid ester, the silane coupling agent, the silica sol and the filler is similar, and the functional groups of the three components can react with the surface functional groups of the filler powder, so that the filler of the coating can be better wrapped by the mixed solution of the three components. The ceramic powder is used as high-temperature filler to provide protective performance for the high-temperature stage of the coating. The acidic silica sol not only plays a role in preparing the binder, but also serves as a catalyst in the coating curing stage to catalyze the reaction of the coating and moisture in the air. The low-melting glass powder is used as a filler in the low-temperature stage of the coating, is filled in the coating, softens and becomes sticky when the using temperature exceeds the vitrification temperature of the coating, provides bonding capability for the coating in the high-temperature stage, and becomes brittle when the temperature is reduced, but the coating and the substrate generate great stress due to the fact that the thermal expansion coefficient of the glass powder is greatly different from that of the substrate, and the coating and the substrate are peeled off. The coating auxiliary agent can enable filler powder to be fully and uniformly dispersed in the coating, and improve the construction performance of the coating.
The paint of the invention uses the characteristic of low-temperature glass powder, takes the low-temperature glass powder as filler, takes the high-temperature glass powder as binder, and self-peels off due to the stress effect when the temperature is reduced. Can provide the protection for the substrate when high temperature, self-peeling off when resume the room temperature, resume the substrate original appearance, have convenient to use, waterborne environmental protection can self-peeling off, and the temperature resistance is very much higher than other organic can peel off the characteristics of coating, can very big solution metal thermal spraying in-process, the shielding protection problem of substrate under high temperature environment. Improving the high temperature adaptability of the thermal spraying base material and improving the thermal spraying efficiency.
The action of the glass frit in this embodiment is in three stages:
the glass frit is still in a solid state and fills the paint coating when the temperature is below the low temperature stage of the glass transition temperature.
When the temperature reaches and exceeds the glass transition temperature, the glass melts, softens and becomes viscous, changing from a filling action to a binding action.
When the temperature is changed from high to low, the glass solidifies, hardens and becomes brittle, and the glass generates a large stress due to a large difference in expansion coefficient from the substrate. Brittle glass cannot resist such large stresses, under which the glass breaks and peels off
The ceramic powder plays a role in filling in the whole stage;
the present invention is further illustrated by the following specific examples, which are not intended to limit the scope of the invention.
Example 1
1. 1 part of tetraethyl orthosilicate, 4 parts of methyltrimethoxysilane and 0.2 part of acidic silica sol are fully and uniformly stirred and mixed according to the mass ratio, the stirring speed is 300r/min, and the stirring time is 40min, so as to obtain a mixed solution
2. Mixing 2 parts of alumina powder, 3 parts of low-melting glass powder, 0.1 part of sodium dodecyl sulfate, 0.1 part of polyethylene glycol and the mixed solution according to the mass ratio, ball milling, uniformly dispersing, and carrying out ball milling at the speed of 40r/min for 180min to obtain the high-temperature-resistant strippable coating
3. The prepared coating is stored in a sealing way, and is coated on the surface of a matrix according to the requirement when in use, and is dried and cured at room temperature.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
Claims (8)
1. The water-based single-component high-temperature-resistant strippable paint is characterized by comprising, by weight, 1-8 parts of silicate, 1-8 parts of a silane coupling agent, 1-6 parts of ceramic powder, 1-6 parts of low-melting-point glass powder, 0.1-1 part of silica sol and 0.1-0.5 part of an auxiliary agent.
2. The aqueous single-component high-temperature-resistant strippable coating of claim 1, wherein the silicate is one or more of tetramethyl orthosilicate, tetraethyl orthosilicate and silicon-40.
3. The aqueous single-component high-temperature-resistant strippable coating according to claim 1, wherein the silane coupling agent is one or more of methyltrimethoxysilane, dimethyldimethoxysilane, methyltriethoxysilane, dimethyldiethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane and phenyltrimethoxysilane.
4. The aqueous single-component high-temperature-resistant strippable coating according to claim 1, wherein the ceramic powder is one or more of ceramic powder, alumina powder, zirconia powder and silica powder.
5. The aqueous single-component high-temperature resistant strippable coating of claim 1, wherein the glass transition temperature of the low-melting glass frit is 300-600 ℃ and the glass frit has a low expansion coefficient.
6. The aqueous single-component high-temperature-resistant strippable coating of claim 1, wherein the silica sol is an acidic silica sol and has a ph of 2 to 4.
7. The aqueous single-component high-temperature-resistant strippable coating according to claim 1, wherein the auxiliary agent is one or more of sodium dodecyl sulfate, sodium tripolyphosphate, sodium pyrophosphate and polyethylene glycol.
8. A method of preparing the aqueous one-component high temperature resistant strippable coating of claims 1-7 comprising:
step 1: according to the weight portions, fully and uniformly stirring and mixing silicate, silane coupling agent and silica sol, wherein the stirring speed is 200-400r/min, and the stirring time is 30-60min to obtain a mixed solution;
step 2: according to the weight portions, the ceramic powder, the low-melting glass powder, the auxiliary agent and the mixed solution are mixed by ball milling, the dispersion is uniform, the ball milling speed is 30-80r/min, and the time is 120-240min, so that the high-temperature resistant strippable coating is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311791654.6A CN117701146A (en) | 2023-12-25 | 2023-12-25 | Water-based single-component high-temperature-resistant strippable coating and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311791654.6A CN117701146A (en) | 2023-12-25 | 2023-12-25 | Water-based single-component high-temperature-resistant strippable coating and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117701146A true CN117701146A (en) | 2024-03-15 |
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ID=90145949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311791654.6A Pending CN117701146A (en) | 2023-12-25 | 2023-12-25 | Water-based single-component high-temperature-resistant strippable coating and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117701146A (en) |
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2023
- 2023-12-25 CN CN202311791654.6A patent/CN117701146A/en active Pending
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