CN103594142A - Method for preparing heat-resistant insulating paint - Google Patents
Method for preparing heat-resistant insulating paint Download PDFInfo
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- CN103594142A CN103594142A CN201310491874.7A CN201310491874A CN103594142A CN 103594142 A CN103594142 A CN 103594142A CN 201310491874 A CN201310491874 A CN 201310491874A CN 103594142 A CN103594142 A CN 103594142A
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Abstract
The invention provides a method for preparing heat-resistant insulating paint. The method includes the following steps that firstly, a pink collosol solution is prepared; secondly, dark brown collosol is prepared; thirdly, xerogel fine powder is prepared; fourthly, a sheet is formed and undergoes heat processing. The method for preparing the heat-resistant insulating paint is friendly to environment, advanced and easy and convenient to implement. The insulating performance of the heat-resistant insulating paint prepared with the collosol-gel method is obviously improved and the heat-resistance temperature can reach 800 DEG C.
Description
Technical field
The present invention relates to a kind of coatings, relate in particular to a kind of preparation method of high-temperature-resistant insulating paint, belong to insulating material technical field.
Background technology
High-temperature-resistant insulating paint has been widely used in the protective layer of high-tension bus-bar, the coating varnish of the protective layer of subterranean cable, heater etc. as a kind of H class F insulating material F.In recent years, in a lot of high-temperature-resistant insulating paints, add inorganic material, because of inorganic material, there is the performances such as good heat-resisting, insulation, resistance to chemical attack and mechanically stable, can effectively improve the high temperature resistant electrical insulation capability of coatings.
At present, although prepare the method for high-temperature-resistant insulating paint, obtained very fast development, but majority system Preparation Method equipment is complicated, to environment, generation is polluted, Technology for Heating Processing is unreasonable, technology is difficult to promote, the high-temperature-resistant insulating paint of preparation or be that electrical insulation capability reaches requirement, but resistance to elevated temperatures does not reach requirement; Be that resistance to elevated temperatures reaches requirement, but electrical insulation capability is not ideal enough.
Summary of the invention
For the demand, the invention provides a kind of preparation method of high-temperature-resistant insulating paint, this preparation method's environmental protection is advanced, is easy to implement, and the high-temperature-resistant insulating paint electrical insulation capability of preparing by sol-gel process is significantly improved, and thermal endurance can reach 800 ℃.
The present invention is a kind of preparation method of high-temperature-resistant insulating paint, and described preparation method comprises the steps: a) to prepare pink sol solution, b) prepares dark brown colloidal sol, c) prepares xerogel fine powder, d) in blocks and heat treatment.
In a preferred embodiment of the present invention, in described step a), pink sol solution composition and the proportioning of preparation are: tetraethoxysilane 18～22%, ethanol 30～33%, deionized water 45～52%, sodium nitrate 1～2g/L, potassium nitrate 1～2g/L, aluminum nitrate 1～2g/L, cobalt nitrate 1～2g/L, boric acid 3～4g/L.
In a preferred embodiment of the present invention, in described step b), dark brown colloidal sol adds 2.8～3.3g/L chromium oxide to make in pink sol solution.
In a preferred embodiment of the present invention, in described step c), prepare xerogel fine powder and comprise the steps: 1) be dried dark brown colloidal sol and produce xerogel; 2) grind xerogel and produce xerogel fine powder.
In a preferred embodiment of the present invention, described dry treatment temperature is 120 ℃, and the dry processing time is 8～10h, and grinding the xerogel powder particle size of producing is 180 orders.
In a preferred embodiment of the present invention, in described step d), in blocks and heat treatment step comprises: compressed dry gel fine powder is in blocks, heat treatment, silver-plated, dry; Wherein, heat treatment temperature is 800 ℃, and heat treatment time is 30min.
The present invention has disclosed a kind of preparation method of high-temperature-resistant insulating paint, and this preparation method's environmental protection is advanced, is easy to implement, and the high-temperature-resistant insulating paint electrical insulation capability of preparing by sol-gel process is significantly improved, and thermal endurance can reach 800 ℃.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation:
Fig. 1 is embodiment of the present invention high-temperature-resistant insulating paint preparation method's process figure.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present invention is described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention is made to more explicit defining.
Fig. 1 is embodiment of the present invention high-temperature-resistant insulating paint preparation method's process figure; This preparation method comprises the steps: a) to prepare pink sol solution, b) prepares dark brown colloidal sol, c) prepares xerogel fine powder, d) in blocks and heat treatment.
Embodiment 1
Concrete preparation method is as follows:
A) prepare pink sol solution, concrete preparation process is: first 18% tetraethoxysilane, 30% ethanol and 52% deionized water are mixed, and constantly stir, then in whipping process, add successively 1g/L sodium nitrate, 1g/L potassium nitrate, 1g/L aluminum nitrate, the inorganic raw materials such as 1g/L cobalt nitrate and 3g/L boric acid, make peach vitreosol solution
B) prepare dark brown colloidal sol, concrete preparation process is: first 2.8g/L chromium oxide is slowly joined in the pink sol solution of preparing in step a), and stir 30min, it is mixed, then static 30min makes auburn colloidal sol.
C) prepare xerogel fine powder, prepare xerogel fine powder and comprise the steps: 1) be dried dark brown colloidal sol and produce xerogel; The dark brown colloidal sol preparing in step b) is placed in the drying box of 120 ℃, after dry 8h, takes out and form xerogel.2) grind xerogel and produce xerogel fine powder; The xerogel of producing in step 1) is levigate by it with agate mortar, cross 180 mesh sieves and obtain xerogel fine powder.
D) in blocks and heat treatment, concrete preparation process is: first the xerogel fine powder of producing in step c) is utilized the pressurize 10min compacting under the pressure of 15MPa of hydraulic pressure tablet press machine in blocks, during compacting, add a certain amount of adhesive polyvinyl alcohol, then heat treatment 30min at 800 ℃, finally, to carrying out in flakes silver-plated and dry processing after heat treatment, make high-temperature-resistant insulating paint.
Embodiment 2
Concrete preparation method is as follows:
A) prepare pink sol solution, concrete preparation process is: first 22% tetraethoxysilane, 33% ethanol and 45% deionized water are mixed, and constantly stir, then in whipping process, add successively 2g/L sodium nitrate, 2g/L potassium nitrate, 2g/L aluminum nitrate, the inorganic raw materials such as 2g/L cobalt nitrate and 4g/L boric acid, make peach vitreosol solution
B) prepare dark brown colloidal sol, concrete preparation process is: first 3.3g/L chromium oxide is slowly joined in the pink sol solution of preparing in step a), and stir 30min, it is mixed, then static 30min makes auburn colloidal sol.
C) prepare xerogel fine powder, prepare xerogel fine powder and comprise the steps: 1) be dried dark brown colloidal sol and produce xerogel; The dark brown colloidal sol preparing in step b) is placed in the drying box of 120 ℃, after dry 10h, takes out and form xerogel.2) grind xerogel and produce xerogel fine powder; The xerogel of producing in step 1) is levigate by it with agate mortar, cross 180 mesh sieves and obtain xerogel fine powder.
D) in blocks and heat treatment, concrete preparation process is: first the xerogel fine powder of producing in step c) is utilized the pressurize 10min compacting under the pressure of 15MPa of hydraulic pressure tablet press machine in blocks, during compacting, add a certain amount of adhesive polyvinyl alcohol, then heat treatment 30min at 800 ℃, finally, to carrying out in flakes silver-plated and dry processing after heat treatment, make high-temperature-resistant insulating paint.
The present invention has disclosed a kind of preparation method of high-temperature-resistant insulating paint, and this preparation method's environmental protection is advanced, is easy to implement, and the high-temperature-resistant insulating paint electrical insulation capability of preparing by sol-gel process is significantly improved, and thermal endurance can reach 800 ℃.
The above; it is only the specific embodiment of the present invention; but protection scope of the present invention is not limited to this; any those of ordinary skill in the art are in the disclosed technical scope of the present invention; the variation that can expect without creative work or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range that claims were limited.
Claims (6)
1. a preparation method for high-temperature-resistant insulating paint, is characterized in that, described preparation method comprises the steps: a) to prepare pink sol solution, b) prepares dark brown colloidal sol, c) prepares xerogel fine powder, d) in blocks and heat treatment.
2. the preparation method of high-temperature-resistant insulating paint according to claim 1, it is characterized in that, in described step a), pink sol solution composition and the proportioning of preparation are: tetraethoxysilane 18～22%, ethanol 30～33%, deionized water 45～52%, sodium nitrate 1～2g/L, potassium nitrate 1～2g/L, aluminum nitrate 1～2g/L, cobalt nitrate 1～2g/L, boric acid 3～4g/L.
3. the preparation method of high-temperature-resistant insulating paint according to claim 1, is characterized in that, in described step b), dark brown colloidal sol adds 2.8～3.3g/L chromium oxide to make in pink sol solution.
4. the preparation method of high-temperature-resistant insulating paint according to claim 1, is characterized in that, in described step c), prepares xerogel fine powder and comprises the steps: 1) be dried dark brown colloidal sol and produce xerogel; 2) grind xerogel and produce xerogel fine powder.
5. the preparation method of high-temperature-resistant insulating paint according to claim 4, is characterized in that, described dry treatment temperature is 120 ℃, and the dry processing time is 8～10h, and grinding the xerogel powder particle size of producing is 180 orders.
6. the preparation method of high-temperature-resistant insulating paint according to claim 1, is characterized in that, in described step d), in blocks and heat treatment step comprises: compressed dry gel fine powder is in blocks, heat treatment, silver-plated, dry; Wherein, heat treatment temperature is 800 ℃, and heat treatment time is 30min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310491874.7A CN103594142A (en) | 2013-10-21 | 2013-10-21 | Method for preparing heat-resistant insulating paint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310491874.7A CN103594142A (en) | 2013-10-21 | 2013-10-21 | Method for preparing heat-resistant insulating paint |
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| CN103594142A true CN103594142A (en) | 2014-02-19 |
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| CN201310491874.7A Pending CN103594142A (en) | 2013-10-21 | 2013-10-21 | Method for preparing heat-resistant insulating paint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108892979A (en) * | 2018-06-19 | 2018-11-27 | 张文霞 | One kind is for environment friendly heat resistant refractory coating and preparation method thereof |
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2013
- 2013-10-21 CN CN201310491874.7A patent/CN103594142A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108892979A (en) * | 2018-06-19 | 2018-11-27 | 张文霞 | One kind is for environment friendly heat resistant refractory coating and preparation method thereof |
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Application publication date: 20140219 |