CN112063300A - Polysilazane high-temperature resistant coating and preparation method thereof - Google Patents
Polysilazane high-temperature resistant coating and preparation method thereof Download PDFInfo
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- CN112063300A CN112063300A CN202011027034.1A CN202011027034A CN112063300A CN 112063300 A CN112063300 A CN 112063300A CN 202011027034 A CN202011027034 A CN 202011027034A CN 112063300 A CN112063300 A CN 112063300A
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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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/16—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers in which all the silicon atoms are connected by linkages other than oxygen atoms
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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
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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Abstract
The invention discloses a polysilazane high-temperature resistant coating and a preparation method thereof, wherein the polysilazane high-temperature resistant coating is composed of the following raw materials in parts by weight: 25-40 parts of polysilazane resin, 6-12 parts of mica powder, 6-11 parts of talcum powder, 5-10 parts of kaolin, 8-15 parts of dimethylbenzene, 2-4 parts of butyl acetate, 12-18 parts of high-temperature resistant black pigment, 1-2 parts of fumed silica and 1-2 parts of dispersing agent. The polysilazane high-temperature resistant coating disclosed by the invention has a normal paint film at a high temperature of 1200 ℃, and has good high-temperature resistance. The silazane high-temperature-resistant coating prepared by the method disclosed by the invention has the advantages that the coating does not change color, crack or fall off at the temperature of 700-1200 ℃, and the high-temperature-resistant performance is very good.
Description
Technical Field
The invention belongs to the technical field of chemical coatings, and particularly relates to a polysilazane high-temperature-resistant coating and a preparation method thereof.
Background
The polysilazane high-temperature resistant coating is a coating taking polysilazane resin as a main film forming substance, has excellent performances of heat resistance, radiation resistance, water resistance, chemical corrosion resistance, electric insulation and the like, and is rapidly developed in recent years. But the heat-resistant temperature of the pure organic silicon resin is lower at present, only about 300 ℃, the temperature can reach 400-500 ℃ after the high-temperature resistant pigment and filler are added, and the coating is easy to discolor, crack and fall off at the higher temperature of 600 ℃. Therefore, a polysilazane high-temperature resistant coating capable of resisting the high temperature of more than 1000 ℃ needs to be developed to meet the market demand.
Disclosure of Invention
The invention provides a polysilazane high-temperature resistant coating and a preparation method thereof, aiming at overcoming the defects of the prior art and overcoming the defect of poor heat resistance of the traditional organosilicon high-temperature resistant coating.
The invention is realized by the following technical scheme: the invention discloses a polysilazane high-temperature resistant coating which is prepared from the following raw materials in parts by weight: 25-40 parts of polysilazane resin, 6-12 parts of mica powder, 6-11 parts of talcum powder, 5-10 parts of kaolin, 8-15 parts of dimethylbenzene, 2-4 parts of butyl acetate, 12-18 parts of high-temperature resistant black pigment, 1-2 parts of fumed silica and 1-2 parts of dispersing agent.
As a preferred embodiment of the invention, the polysilazane high-temperature resistant coating comprises the following raw materials in parts by weight: 28-35 parts of polysilazane resin, 8-10 parts of mica powder, 7-10 parts of talcum powder, 6-9 parts of kaolin, 10-12 parts of dimethylbenzene, 2.5-3 parts of butyl acetate, 13-17 parts of high-temperature resistant black pigment, 1.2-1.8 parts of fumed silica and 1.3-1.7 parts of dispersing agent.
As the best mode of the invention, the polysilazane high-temperature resistant coating comprises the following raw materials in parts by weight: 30 parts of polysilazane resin, 9 parts of mica powder, 8 parts of talcum powder, 7 parts of kaolin, 11 parts of dimethylbenzene, 2.8 parts of butyl acetate, 14 parts of high-temperature resistant black pigment, 1.5 parts of fumed silica and 1.4 parts of dispersant.
The invention also discloses a preparation method of the polysilazane high-temperature resistant coating, which comprises the following steps:
the method comprises the following steps: weighing the raw materials according to the weight parts of the components of the polysilazane high-temperature resistant coating raw materials, then respectively placing the pigment and the filler in a dry and clean tray, placing the tray in a vacuum oven for drying, respectively bagging and sealing after natural cooling for later use, and carrying out corresponding identification;
step two: adding polysilazane resin and a dispersant into a charging basket, adding a part of solvent, stirring for 15min at a low speed by using a high-speed stirrer, adding the dried raw materials in the step one after uniform dispersion, stirring for 30min at a rotating speed of 1200-1500r/min, grinding until the fineness of the coating is below 30 microns after uniform dispersion, adjusting the viscosity to 200-800cp by using the residual solvent, filtering and packaging after qualified detection.
The invention has the beneficial effects that: in the prior art, although a paint film of the traditional organosilicon high-temperature resistant paint has no bubbling, cracking or falling at 600 ℃, the traditional organosilicon high-temperature resistant paint is carbonized at high temperature, so that the paint film has a fading phenomenon and loses bonding strength, and the paint film falls off after being scratched in hundreds of grids. The polysilazane high-temperature resistant coating disclosed by the invention has a normal paint film at a high temperature of 1200 ℃, and has good high-temperature resistance. The silazane high-temperature-resistant coating prepared by the method disclosed by the invention has the advantages that the coating does not change color, crack or fall off at the temperature of 700-1200 ℃, and the high-temperature-resistant performance is very good.
Detailed Description
The present invention will be described in detail with reference to specific examples.
Example 1: the polysilazane high-temperature resistant coating is prepared from the following components in parts by weight: 30 parts of polysilazane resin, 10 parts of mica powder, 15 parts of talcum powder, 15 parts of kaolin, 8 parts of dimethylbenzene, 5 parts of butyl acetate, 14 parts of high-temperature resistant black pigment, 1.5 parts of fumed silica and 1 part of dispersant.
The preparation method of the polysilazane high-temperature resistant coating comprises the following steps: weighing the raw materials according to the weight parts of the raw materials of the coating, then respectively placing the pigment and the filler in a dry and clean tray, placing the tray in a vacuum oven for drying, respectively bagging and sealing after natural cooling for later use, and carrying out corresponding identification; secondly, adding polysilazane resin and a dispersant into a charging basket, adding part of a solvent, stirring for 15min at a low speed by using a high-speed stirrer, adding the dried raw materials after uniform dispersion, stirring for 30min at a rotating speed of 1200-1500r/min, grinding until the coating fineness is below 30 microns after uniform dispersion, adjusting the viscosity to 200-800cp by using the residual solvent, filtering and packaging after qualified detection.
Example 2: the polysilazane high-temperature resistant coating is prepared from the following components in parts by weight: 40 parts of polysilazane resin, 7 parts of mica powder, 10.5 parts of talcum powder, 13 parts of kaolin, 8 parts of dimethylbenzene, 5 parts of butyl acetate, 14 parts of high-temperature resistant black pigment, 1.5 parts of fumed silica and 1 part of dispersant.
The preparation method of the polysilazane high-temperature resistant coating comprises the following steps: weighing the raw materials according to the weight parts of the raw materials of the coating, then respectively placing the pigment and the filler in a dry and clean tray, placing the tray in a vacuum oven for drying, respectively bagging and sealing after natural cooling for later use, and carrying out corresponding identification; secondly, adding polysilazane resin and a dispersant into a charging basket, adding part of a solvent, stirring for 15min at a low speed by using a high-speed stirrer, adding the dried raw materials after uniform dispersion, stirring for 30min at a rotating speed of 1200-1500r/min, grinding until the coating fineness is below 30 microns after uniform dispersion, adjusting the viscosity to 200-800cp by using the residual solvent, filtering and packaging after qualified detection.
Example 3: the polysilazane high-temperature resistant coating is prepared from the following components in parts by weight: 35 parts of polysilazane resin, 8 parts of mica powder, 12.5 parts of talcum powder, 15 parts of kaolin, 8 parts of dimethylbenzene, 5 parts of butyl acetate, 14 parts of high-temperature resistant black pigment, 1.5 parts of fumed silica and 1 part of dispersant.
The preparation method of the polysilazane high-temperature resistant coating comprises the following steps: weighing the raw materials according to the weight parts of the raw materials of the coating, then respectively placing the pigment and the filler in a dry and clean tray, placing the tray in a vacuum oven for drying, respectively bagging and sealing after natural cooling for later use, and carrying out corresponding identification; secondly, adding polysilazane resin and a dispersant into a charging basket, adding part of a solvent, stirring for 15min at a low speed by using a high-speed stirrer, adding the dried raw materials after uniform dispersion, stirring for 30min at a rotating speed of 1200-1500r/min, grinding until the coating fineness is below 30 microns after uniform dispersion, adjusting the viscosity to 200-800cp by using the residual solvent, filtering and packaging after qualified detection.
Comparative example 1: an organic silicon high-temperature resistant coating is prepared from the following components in parts by weight: 35 parts of organic silicon (siloxane) resin, 7 parts of mica powder, 10 parts of talcum powder, 13.5 parts of kaolin, 10 parts of dimethylbenzene, 7 parts of butyl acetate, 15 parts of high-temperature resistant black pigment, 1.5 parts of fumed silica and 1 part of dispersing agent.
The preparation method of the organic silicon high-temperature resistant coating comprises the following steps: adding organic silicon (siloxane) resin and a dispersing agent into a charging basket, adding a part of solvent, stirring at a low speed for 15 minutes by using a high-speed stirrer, adding pigment and filler raw materials after uniform dispersion, stirring at a rotating speed of 1200-1500r/min for 30 minutes, grinding until the fineness of the coating is below 30 micrometers after uniform dispersion, adjusting the viscosity to 200-800cp by using the residual solvent, filtering and packaging after qualified detection.
Comparative example 2: an organic silicon high-temperature resistant coating is prepared from the following components in parts by weight: 40 parts of organic silicon (siloxane) resin, 6 parts of mica powder, 8.5 parts of talcum powder, 11 parts of kaolin, 10 parts of dimethylbenzene, 7 parts of butyl acetate, 15 parts of high-temperature resistant black pigment, 1.5 parts of fumed silica and 1 part of dispersing agent.
The preparation method of the organic silicon high-temperature resistant coating comprises the following steps: adding organic silicon (siloxane) resin and a dispersing agent into a charging basket, adding a part of solvent, stirring at a low speed for 15 minutes by using a high-speed stirrer, adding pigment and filler raw materials after uniform dispersion, stirring at a rotating speed of 1200-1500r/min for 30 minutes, grinding until the fineness of the coating is below 30 micrometers after uniform dispersion, adjusting the viscosity to 200-800cp by using the residual solvent, filtering and packaging after qualified detection.
Table 1 shows the performance test results of the polysilazane high temperature-resistant coating prepared in the inventive example and the comparative example:
table 1: performance test results of each polysilazane high-temperature-resistant coating
From the experimental results in table 1, the conventional high temperature resistant silicone (siloxane) coating has no blistering, cracking and falling off at 600 ℃, but the silicone (siloxane) resin is carbonized at high temperature, so that the paint film has a fading phenomenon, loses bonding strength and falls off after being scratched in hundreds of grids; the polysilazane high-temperature resistant coating disclosed by the invention has a normal paint film at 1200 ℃, and has good high-temperature resistance.
Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, and that the simple modifications or equivalent substitutions of the technical solutions of the present invention by those of ordinary skill in the art can be made without departing from the spirit and scope of the technical solutions of the present invention.
Claims (4)
1. A high-temperature polysilazane coating is characterized in that: the polysilazane high-temperature resistant coating is composed of the following raw materials in parts by weight: 25-40 parts of polysilazane resin, 6-12 parts of mica powder, 6-11 parts of talcum powder, 5-10 parts of kaolin, 8-15 parts of dimethylbenzene, 2-4 parts of butyl acetate, 12-18 parts of high-temperature resistant black pigment, 1-2 parts of fumed silica and 1-2 parts of dispersing agent.
2. The polysilazane high-temperature resistant coating according to claim 1, wherein: the polysilazane high-temperature resistant coating is composed of the following raw materials in parts by weight: 28-35 parts of polysilazane resin, 8-10 parts of mica powder, 7-10 parts of talcum powder, 6-9 parts of kaolin, 10-12 parts of dimethylbenzene, 2.5-3 parts of butyl acetate, 13-17 parts of high-temperature resistant black pigment, 1.2-1.8 parts of fumed silica and 1.3-1.7 parts of dispersing agent.
3. A polysilazane high-temperature resistant coating according to claim 2, characterized in that: the polysilazane high-temperature resistant coating is composed of the following raw materials in parts by weight: 30 parts of polysilazane resin, 9 parts of mica powder, 8 parts of talcum powder, 7 parts of kaolin, 11 parts of dimethylbenzene, 2.8 parts of butyl acetate, 14 parts of high-temperature resistant black pigment, 1.5 parts of fumed silica and 1.4 parts of dispersant.
4. The method for preparing a polysilazane high-temperature resistant coating according to claim 1, wherein: the preparation method of the polysilazane high-temperature resistant coating comprises the following steps:
the method comprises the following steps: weighing the raw materials according to the weight parts of the components of the polysilazane high-temperature resistant coating raw materials, then respectively placing the pigment and the filler in a dry and clean tray, placing the tray in a vacuum oven for drying, respectively bagging and sealing after natural cooling for later use, and carrying out corresponding identification;
step two: adding polysilazane resin and a dispersant into a charging basket, adding a part of solvent, stirring for 15min at a low speed by using a high-speed stirrer, adding the dried raw materials in the step one after uniform dispersion, stirring for 30min at a rotating speed of 1200-1500r/min, grinding until the fineness of the coating is below 30 microns after uniform dispersion, adjusting the viscosity to 200-800cp by using the residual solvent, filtering and packaging after qualified detection.
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| CN202011027034.1A CN112063300A (en) | 2020-09-26 | 2020-09-26 | Polysilazane high-temperature resistant coating and preparation method thereof |
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| CN202011027034.1A CN112063300A (en) | 2020-09-26 | 2020-09-26 | Polysilazane high-temperature resistant coating and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113717639A (en) * | 2021-09-15 | 2021-11-30 | 库贝化学（上海）有限公司 | Polysilazane high-temperature resistant paint for carbon fiber composite material and preparation method thereof |
| CN115636941A (en) * | 2022-11-01 | 2023-01-24 | 杭州清瓷新材料科技有限公司 | Synthesis method of high-silicon-hydrogen polysilazane and prepared single-component ceramic coating |
| CN115819093A (en) * | 2022-10-17 | 2023-03-21 | 杭州清瓷新材料科技有限公司 | Ceramic aerogel prepared from polysilazane, preparation method and heat insulation coating thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113717639A (en) * | 2021-09-15 | 2021-11-30 | 库贝化学（上海）有限公司 | Polysilazane high-temperature resistant paint for carbon fiber composite material and preparation method thereof |
| CN115819093A (en) * | 2022-10-17 | 2023-03-21 | 杭州清瓷新材料科技有限公司 | Ceramic aerogel prepared from polysilazane, preparation method and heat insulation coating thereof |
| CN115819093B (en) * | 2022-10-17 | 2023-10-24 | 杭州清瓷新材料科技有限公司 | Ceramic aerogel prepared from polysilazane, preparation method and heat insulation coating thereof |
| CN115636941A (en) * | 2022-11-01 | 2023-01-24 | 杭州清瓷新材料科技有限公司 | Synthesis method of high-silicon-hydrogen polysilazane and prepared single-component ceramic coating |
| CN115636941B (en) * | 2022-11-01 | 2024-01-23 | 杭州清瓷新材料科技有限公司 | Synthesis method of high-silicon hydrogen polysilazane and single-component ceramic coating prepared by same |
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