CN104262908A - Preparation method for epoxy cast resin of alternating current high-voltage sleeve - Google Patents
Preparation method for epoxy cast resin of alternating current high-voltage sleeve Download PDFInfo
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- CN104262908A CN104262908A CN201410567651.9A CN201410567651A CN104262908A CN 104262908 A CN104262908 A CN 104262908A CN 201410567651 A CN201410567651 A CN 201410567651A CN 104262908 A CN104262908 A CN 104262908A
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Abstract
The invention discloses a preparation method for epoxy cast resin of an alternating current high-voltage sleeve. According to the method, a large amount of powdered filler is added, and the processing of raw materials is convenient, so that the resin cost is lowered; the mechanical property and the conductivity of resin are greatly improved; furthermore, the adopted raw materials are non-toxic, cannot be volatilized and are green and environment-friendly; by adoption of cycloaliphatic epoxide resin, a product is extremely high in weather resistance and dielectric property. The alternating current high-voltage sleeve prepared from the cast resin prepared by the preparation method is extremely high in impact strength, electrical strength and flame retardancy, is also excellent in conductivity, and can meet the requirement on the performance of alternating current high-voltage sleeve equipment; moreover, due to the extremely low content of volatile substances, the use safety and the environment friendliness of the epoxy cast resin are guaranteed; the epoxy cast resin can be widely used in the field of electrical equipment.
Description
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Technical field
The present invention relates to a kind of preparation method of casting resin, be specifically related to a kind of preparation method of AC high voltage sleeve epoxy casting resin.
Background technology
Along with the continuous growth of Electricity Demand, require also more and more higher to the electric service having safe and high quality, the number of stoppages such as power failure power-off require fewer and feweri, in conventional sleeve pipe use procedure, potential safety hazard is comparatively large, maintenance cost is higher, the accidents such as easy generation irregularly has a power failure, bushing explosion is hurted sb.'s feelings, need to develop the bushing of explosion-proof, antidetonation, pollution-free, environmental type for this reason.
General outdoor high-voltage sleeve pipe adopts ceramic, and the bushing of epoxy goods, the advantages such as not only it is lightweight, and volume is little, and shock-resistance is good, and simple for production, mechanical property and excellent electrical properties.
The quality of bushing, depends on the insulating material used in bushing to a great extent, wherein especially with the embodiment that its casing property is final especially of the choice for use of resin material, especially than indispensable.And the epoxy resin not having suitable species at present prepares bushing.
Summary of the invention
The technical issues that need to address of the present invention are just the defect overcoming prior art, a kind of preparation method of AC high voltage sleeve epoxy casting resin is provided, the method adds a large amount of powdery type filler, process convenient and reduce resin cost, greatly improving mechanical property and the thermal conductivity of resin; And the advantages of nontoxic raw materials adopted is non-volatile, environmental protection; Adopt cycloaliphatic epoxy resin, make product have splendid weathering resistance and dielectric properties.
For solving the problem, the present invention adopts technical scheme to be:
The preparation method of AC high voltage sleeve epoxy casting resin, the step of this preparation method is:
(1) powder pre-treatment: pure powder is carried out drying treatment, by the powder of humidity in baking oven metal sheet upper berth generate skim, the thickness of this powder thin layer is less than 150mm, then open baking oven and drying treatment is carried out to powder, drying temperature is 130 ~ 150 DEG C, time of drying is 12 ~ 24 h, be cooled to after drying completes 60 ~ 80 DEG C for subsequent use; Powdery type filler can reduce the manufacturing cost of resin greatly, can greatly improve product mechanical property and thermal conductivity, reducing the contraction caused because of cold and hot because being dispersed in resin, thus makes workpiece tightr, ensure that the optimum performance of casting resin product.
(2) thermal pretreatment: by resin and dried powder, be placed on respectively in baking oven and be preheating to 60 ~ 80 DEG C, insulation treats that lower step uses;
(3) mix degassed: the resin adding 100 mass fractions in mixing tank, start stirring, more slowly add the powder of 350 ~ 450 mass fractions in mixing tank; Mixture in mixing tank is by stirring under the condition of vacuum pump evacuation, and vacuum tightness is 1 ~ 10mbar, churning time 2 ~ 3h, stirring velocity 50 revs/min, removes volatile constituent in mixture, remaining moisture and gas; The volatile gases vacuumizing extraction is carried out collection and treatment, realize paint having no volatile substances in production process to overflow, guarantee the feature of environmental protection of production process, simultaneously, also the volatile component minimum content in final casting resin product can be guaranteed, to ensure the security that casting resin product uses and the feature of environmental protection;
(4) cool: after mixing tank has mixed, mixture in mixing tank is cooled to 40 ~ 60 DEG C, recover normal pressure and add solidifying agent and promotor in mixing tank, after continuing to stir 30min, the temperature keeping mixture is 40 ~ 50 DEG C, obtained required AC high voltage sleeve epoxy casting resin, the cast that namely can be used for AC high voltage sleeve uses.
Resin is cycloaliphatic epoxy resin.Cycloaliphatic epoxy resin is the mixture of one or more materials in the polymkeric substance of hexanaphthene-1,2-dicarboxylic acid 2-glycidyl ester, polypropylene glycol and formaldehyde and epoxy chloropropane and phenol.Above-mentioned cycloaliphatic epoxy resin is the epoxy systems resin for outdoor, not only good weatherability, and resin purity is high, and not chloride, sodium plasma, has higher dielectric properties.Can guarantee that final casting resin has splendid weathering resistance and dielectric properties.
Powder is the mineral filler of silicon class.The mineral filler of silicon class is silicon-dioxide and/or aerosil, and particle diameter is 0.02 ~ 50um.The addition of powder has accounted for 60 ~ 70% of casting resin total mass, powdery type filler can reduce the manufacturing cost of resin greatly, because being dispersed in resin and can greatly improving product mechanical property and thermal conductivity, reduce the contraction caused because of cold and hot, thus make workpiece tightr, ensure that the optimum performance of casting resin product.
Preferably, solidifying agent is hexahydro phthalic anhydride and/or six hydrogen-4-methylphthalic acids, and addition is 75 ~ 88 mass fractions.
Preferably, promotor is benzyldimethylamine, and addition is 0.1 ~ 0.6 mass fraction.
Preferably, cycloaliphatic epoxy resin is 600mPa.s ± 100 the viscosity of 25 DEG C.Can ensure that casting resin is easy to operate when pouring into a mould, and non-volatile, nontoxic, belong to environmental type product.
Advantage of the present invention and beneficial effect are:
In preparation method of the present invention, the addition of powder is adopted to account for 60 ~ 70% of casting resin total mass, powdery type filler can reduce the manufacturing cost of resin greatly, because being dispersed in resin and can greatly improving product mechanical property and thermal conductivity, reduce the contraction caused because of cold and hot, thus make AC high voltage sleeve product tightr, ensure that the optimum performance of AC high voltage sleeve product;
Preparation method of the present invention, the cycloaliphatic epoxy resin of employing is the epoxy systems resin for outdoor, not only good weatherability, and resin purity is high, and not chloride, sodium plasma, has higher dielectric properties.Can guarantee that final AC high voltage sleeve product has splendid weathering resistance and dielectric properties, the service requirements of electrical equipment can be met.
Preparation method of the present invention, the cycloaliphatic epoxy resin adopted is 600mPa.s ± 100 the viscosity of 25 DEG C, can ensure that casting resin is easy to operate when pouring into a mould, and non-volatile, nontoxic, belong to environmental type product, AC high voltage sleeve product can be prepared by convenient and efficient.
Preparation method of the present invention, in mixing degassing operation process, adopt vacuumize degassing, the volatile gases in resin is discharged, guarantee that the volatile matter content in final casting resin product is extremely low, ensure that the feature of environmental protection of casting resin and AC high voltage sleeve product thereof.
Embodiment
The following example will further illustrate the present invention.
embodiment 1
The present invention adopts technical scheme to be the preparation method of AC high voltage sleeve epoxy casting resin, and the step of this preparation method is:
(1) powder pre-treatment: pure powder is carried out drying treatment, by the powder of humidity in baking oven metal sheet upper berth generate skim, the thickness of this powder thin layer is less than 150mm, then open baking oven and drying treatment is carried out to powder, drying temperature is 130 DEG C, time of drying is 24 h, be cooled to after drying completes 60 DEG C for subsequent use;
Powder is the silicon-dioxide in the mineral filler of silicon class, and particle diameter is 0.02 ~ 50um.
(2) thermal pretreatment: by resin and dried powder, be placed on respectively in baking oven and be preheating to 60 DEG C, insulation treats that lower step uses;
(3) mix degassed: the resin adding 100 mass fractions in mixing tank, start stirring, more slowly add the powder of 350 mass fractions in mixing tank; Mixture in mixing tank is by stirring under the condition of vacuum pump evacuation, and vacuum tightness is 1 ~ 10mbar, churning time 2 ~ 3h, stirring velocity 50 revs/min, removes volatile constituent in mixture, remaining moisture and gas;
Resin is hexanaphthene-1, the 2-dicarboxylic acid 2-glycidyl ester in cycloaliphatic epoxy resin.Cycloaliphatic epoxy resin is 600mPa.s ± 100 the viscosity of 25 DEG C.
(4) cool: after mixing tank has mixed, mixture in mixing tank is cooled to 40 DEG C, recover normal pressure and add solidifying agent and promotor in mixing tank, after continuing to stir 30min, the temperature keeping mixture is 40 DEG C, obtained required AC high voltage sleeve epoxy casting resin, the cast that namely can be used for AC high voltage sleeve uses.
Solidifying agent is hexahydro phthalic anhydride, and addition is 75 mass fractions.Promotor is benzyldimethylamine, and addition is 0.1 mass fraction.
embodiment 2
The preparation method of AC high voltage sleeve epoxy casting resin, the step of this preparation method is:
(1) powder pre-treatment: pure powder is carried out drying treatment, by the powder of humidity in baking oven metal sheet upper berth generate skim, the thickness of this powder thin layer is less than 150mm, then open baking oven and drying treatment is carried out to powder, drying temperature is 150 DEG C, time of drying is 12 h, be cooled to after drying completes 80 DEG C for subsequent use;
Powder be silicon-dioxide in the mineral filler of silicon class and aerosil according to mass ratio 85:15 mixture, particle diameter is 0.02 ~ 50um.
(2) thermal pretreatment: by resin and dried powder, be placed on respectively in baking oven and be preheating to 80 DEG C, insulation treats that lower step uses;
(3) mix degassed: the resin adding 100 mass fractions in mixing tank, start stirring, more slowly add the powder of 450 mass fractions in mixing tank; Mixture in mixing tank is by stirring under the condition of vacuum pump evacuation, and vacuum tightness is 1 ~ 10mbar, churning time 2 ~ 3h, stirring velocity 50 revs/min, removes volatile constituent in mixture, remaining moisture and gas;
Resin is the polymkeric substance of formaldehyde and epoxy chloropropane and phenol.This resin is 600mPa.s ± 100 the viscosity of 25 DEG C.
(4) cool: after mixing tank has mixed, mixture in mixing tank is cooled to 60 DEG C, recover normal pressure and add solidifying agent and promotor in mixing tank, after continuing to stir 30min, the temperature keeping mixture is 50 DEG C, obtained required AC high voltage sleeve epoxy casting resin, the cast that namely can be used for AC high voltage sleeve uses.
Solidifying agent is six hydrogen-4-methylphthalic acids, and addition is 88 mass fractions.Promotor is benzyldimethylamine, and addition is 0.6 mass fraction.
embodiment 3
The preparation method of AC high voltage sleeve epoxy casting resin, the step of this preparation method is:
(1) powder pre-treatment: pure powder is carried out drying treatment, by the powder of humidity in baking oven metal sheet upper berth generate skim, the thickness of this powder thin layer is less than 150mm, then open baking oven and drying treatment is carried out to powder, drying temperature is 142 DEG C, time of drying is 19 h, be cooled to after drying completes 73 DEG C for subsequent use;
Powder is silicon-dioxide in the mineral filler of silicon class and the aerosil mixture according to mass ratio 95:5, and particle diameter is 0.02 ~ 50um.
(2) thermal pretreatment: by resin and dried powder, be placed on respectively in baking oven and be preheating to 73 DEG C, insulation treats that lower step uses;
(3) mix degassed: the resin adding 100 mass fractions in mixing tank, start stirring, more slowly add the powder of 422 mass fractions in mixing tank; Mixture in mixing tank is by stirring under the condition of vacuum pump evacuation, and vacuum tightness is 1 ~ 10mbar, churning time 2 ~ 3h, stirring velocity 50 revs/min, removes volatile constituent in mixture, remaining moisture and gas;
Resin is the mixture of the quality such as hexanaphthene-1,2-dicarboxylic acid 2-glycidyl ester, polypropylene glycol in cycloaliphatic epoxy resin.Cycloaliphatic epoxy resin is 600mPa.s ± 100 the viscosity of 25 DEG C.
(4) cool: after mixing tank has mixed, mixture in mixing tank is cooled to 52 DEG C, recover normal pressure and add solidifying agent and promotor in mixing tank, after continuing to stir 30min, the temperature keeping mixture is 46 DEG C, obtained required AC high voltage sleeve epoxy casting resin, the cast that namely can be used for AC high voltage sleeve uses.
Solidifying agent is the mixture of the quality such as hexahydro phthalic anhydride and six hydrogen-4-methylphthalic acids, and addition is 82 mass fractions.Promotor is benzyldimethylamine, and addition is 0.45 mass fraction.
embodiment 4
The preparation method of AC high voltage sleeve epoxy casting resin, the step of this preparation method is:
(1) powder pre-treatment: pure powder is carried out drying treatment, by the powder of humidity in baking oven metal sheet upper berth generate skim, the thickness of this powder thin layer is less than 150mm, then open baking oven and drying treatment is carried out to powder, drying temperature is 138 DEG C, time of drying is 21 h, be cooled to after drying completes 68 DEG C for subsequent use;
Powder is the mineral filler of silicon class, and the mineral filler of silicon class is silicon-dioxide, and particle diameter is 0.02 ~ 50um.
(2) thermal pretreatment: by resin and dried powder, be placed on respectively in baking oven and be preheating to 68 DEG C, insulation treats that lower step uses;
(3) mix degassed: the resin adding 100 mass fractions in mixing tank, start stirring, more slowly add the powder of 388 mass fractions in mixing tank; Mixture in mixing tank is by stirring under the condition of vacuum pump evacuation, and vacuum tightness is 1 ~ 10mbar, churning time 2 ~ 3h, stirring velocity 50 revs/min, removes volatile constituent in mixture, remaining moisture and gas;
Resin is the polypropylene glycol in cycloaliphatic epoxy resin.Cycloaliphatic epoxy resin is 600mPa.s ± 100 the viscosity of 25 DEG C.
(4) cool: after mixing tank has mixed, mixture in mixing tank is cooled to 47 DEG C, recover normal pressure and add solidifying agent and promotor in mixing tank, after continuing to stir 30min, the temperature keeping mixture is 43 DEG C, obtained required AC high voltage sleeve epoxy casting resin, the cast that namely can be used for AC high voltage sleeve uses.
Solidifying agent is hexahydro phthalic anhydride, and addition is 78 mass fractions.Promotor is benzyldimethylamine, and addition is 0.3 mass fraction.
After the casting resin cast cured explosive obtained to the embodiment of the present invention 1 to 4 obtains AC high voltage sleeve product, AC high voltage sleeve product performance are detected, comprise following Detection of content:
(1) shock strength detects: adopt shock-testing machine model XJ50D to test by the concrete detection method of GB 15022.2-2007.
(2) electrical strength detects: adopt puncture test machine HT-100 to test by the concrete detection method of GB 15022.2-2007.
(3) flammable detection: detect according to the concrete detection method of GB GB/T15022.2-2007, GB/T2406.2-2009.
(4) environmental-protecting performance: adopt baking oven BGF-140 to measure inner VOC content according to GB GB/T15022.2-2007.
(5) heat conductivility: adopt thermal conductivity instrument TC3500 to detect according to ASTM C 177.
According to above detection method, what the casting resin prepared embodiment 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5 poured into a mould that the AC high voltage sleeve product that obtains detects the results are shown in Table 1.
Table 1:
| Test item | Embodiment 1 product | Embodiment 2 product | Embodiment 3 product | Embodiment 4 product |
| Shock strength (kJ/m 2） | 12.6 | 13.0 | 14.3 | 15.1 |
| Electrical strength (MV/m) | 19.7 | 21.1 | 18.2 | 17.6 |
| Flammability class | HB | HB | HB | HB |
| Environmental-protecting performance VOC content (%) | 0.008 | 0.011 | 0.010 | 0.008 |
| Heat conductivility W/mK | 0.18 | 0.22 | 0.23 | 0.22 |
Can draw according to the detection data in table 1, the AC high voltage sleeve that casting resin prepared by the present invention obtains, there is splendid shock strength, electrical strength, flame retardant properties, there is splendid thermal conductivity simultaneously, the performance requriements of AC high voltage sleeve equipment can be met, and, there is extremely low volatile matter content, ensure that its security used and the feature of environmental protection, can widely use in electrical equipment.
Last it is noted that obviously, above-described embodiment is only for example of the present invention is clearly described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of amplifying out or variation be still among protection scope of the present invention.
Claims (8)
1. the preparation method of AC high voltage sleeve epoxy casting resin, is characterized in that, the step of this preparation method is:
(1) powder pre-treatment: pure powder is carried out drying treatment, by the powder of humidity in baking oven metal sheet upper berth generate skim, the thickness of this powder thin layer is less than 150mm, then open baking oven and drying treatment is carried out to powder, drying temperature is 130 ~ 150 DEG C, time of drying is 12 ~ 24 h, be cooled to after drying completes 60 ~ 80 DEG C for subsequent use;
(2) thermal pretreatment: by resin and dried powder, be placed on respectively in baking oven and be preheating to 60 ~ 80 DEG C, insulation treats that lower step uses;
(3) mix degassed: the resin adding 100 mass fractions in mixing tank, start stirring, more slowly add the powder of 350 ~ 450 mass fractions in mixing tank; Mixture in mixing tank is by stirring under the condition of vacuum pump evacuation, and vacuum tightness is 1 ~ 10mbar, churning time 2 ~ 3h, stirring velocity 50 revs/min, removes volatile constituent in mixture, remaining moisture and gas;
(4) cool: after mixing tank has mixed, mixture in mixing tank is cooled to 40 ~ 60 DEG C, recover normal pressure and add solidifying agent and promotor in mixing tank, after continuing to stir 30min, the temperature keeping mixture is 40 ~ 50 DEG C, obtained required AC high voltage sleeve epoxy casting resin, the cast that namely can be used for AC high voltage sleeve uses.
2. the preparation method of AC high voltage sleeve epoxy casting resin as claimed in claim 1, it is characterized in that, resin is cycloaliphatic epoxy resin.
3. the preparation method of AC high voltage sleeve epoxy casting resin as claimed in claim 2, it is characterized in that, cycloaliphatic epoxy resin is the mixture of one or more materials in the polymkeric substance of hexanaphthene-1,2-dicarboxylic acid 2-glycidyl ester, polypropylene glycol and formaldehyde and epoxy chloropropane and phenol.
4. the preparation method of AC high voltage sleeve epoxy casting resin as claimed in claim 3, it is characterized in that, powder is the mineral filler of silicon class.
5. the preparation method of AC high voltage sleeve epoxy casting resin as claimed in claim 4, it is characterized in that, the mineral filler of silicon class is silicon-dioxide and/or aerosil, and particle diameter is 0.02 ~ 50um.
6. the preparation method of AC high voltage sleeve epoxy casting resin as claimed in claim 5, it is characterized in that, solidifying agent is hexahydro phthalic anhydride and/or six hydrogen-4-methylphthalic acids, and addition is 75 ~ 88 mass fractions.
7. the preparation method of AC high voltage sleeve epoxy casting resin as claimed in claim 6, it is characterized in that, promotor is benzyldimethylamine, and addition is 0.1 ~ 0.6 mass fraction.
8. the preparation method of AC high voltage sleeve epoxy casting resin as claimed in claim 7, it is characterized in that, cycloaliphatic epoxy resin is 600mPa.s ± 100 the viscosity of 25 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410567651.9A CN104262908A (en) | 2014-10-23 | 2014-10-23 | Preparation method for epoxy cast resin of alternating current high-voltage sleeve |
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| CN201410567651.9A CN104262908A (en) | 2014-10-23 | 2014-10-23 | Preparation method for epoxy cast resin of alternating current high-voltage sleeve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108250410A (en) * | 2018-01-19 | 2018-07-06 | 台州永创电气有限公司 | Integrated transformer platform prefabricated busbar and preparation method thereof |
| CN112825284A (en) * | 2019-11-20 | 2021-05-21 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Production process of high-current high-voltage bushing of glass fiber reinforced plastic transformer |
| CN113912982A (en) * | 2021-10-29 | 2022-01-11 | 固德电材系统（苏州）股份有限公司 | Flame-retardant epoxy resin composition for high-voltage bushing and preparation method and application thereof |
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| CN102515626A (en) * | 2012-01-06 | 2012-06-27 | 桂林理工大学 | High heat-conductivity epoxy casting material for dry power transformer and preparation method thereof |
| CN103059513A (en) * | 2013-02-17 | 2013-04-24 | 桂林理工大学 | Castable for manufacturing high-voltage motor nano composite main insulation |
| CN103709608A (en) * | 2013-12-30 | 2014-04-09 | 江西腾德实业有限公司 | Electric-insulation epoxy resin castable for outdoor mutual inductor |
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2014
- 2014-10-23 CN CN201410567651.9A patent/CN104262908A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102515626A (en) * | 2012-01-06 | 2012-06-27 | 桂林理工大学 | High heat-conductivity epoxy casting material for dry power transformer and preparation method thereof |
| CN103059513A (en) * | 2013-02-17 | 2013-04-24 | 桂林理工大学 | Castable for manufacturing high-voltage motor nano composite main insulation |
| CN103709608A (en) * | 2013-12-30 | 2014-04-09 | 江西腾德实业有限公司 | Electric-insulation epoxy resin castable for outdoor mutual inductor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108250410A (en) * | 2018-01-19 | 2018-07-06 | 台州永创电气有限公司 | Integrated transformer platform prefabricated busbar and preparation method thereof |
| CN108250410B (en) * | 2018-01-19 | 2020-07-31 | 台州永创电气有限公司 | Prefabricated bus for integrated transformer platform and preparation method thereof |
| CN112825284A (en) * | 2019-11-20 | 2021-05-21 | 中国南方电网有限责任公司超高压输电公司贵阳局 | Production process of high-current high-voltage bushing of glass fiber reinforced plastic transformer |
| CN113912982A (en) * | 2021-10-29 | 2022-01-11 | 固德电材系统（苏州）股份有限公司 | Flame-retardant epoxy resin composition for high-voltage bushing and preparation method and application thereof |
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Application publication date: 20150107 |