CN1264938C - High voltage insulator coating composition and preparation and application thereof - Google Patents
High voltage insulator coating composition and preparation and application thereof Download PDFInfo
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- CN1264938C CN1264938C CN 01124282 CN01124282A CN1264938C CN 1264938 C CN1264938 C CN 1264938C CN 01124282 CN01124282 CN 01124282 CN 01124282 A CN01124282 A CN 01124282A CN 1264938 C CN1264938 C CN 1264938C
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- voltage insulator
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Abstract
The present invention relates to a composition of paint for high voltage insulation objects, a preparation method thereof and the application thereof. The main components of the composition comprise 28 to 32 parts by weight of polydimethyl siloxane, 31 to 35 parts by weight of dry hibbsite, 2 to 3.6 parts by weight of dye paste, 1.5 to 2.5 parts by weight of filling material, 1 to 3 parts by weight of organosilicon crosslinking agent, 0.5 to 1.5 parts by weight of adhesive accelerating agent, 0.08 to 0.15 parts by weight of condensation catalyst and 5 to 35 parts by weight of dry hydrocarbon solvent. The composition can be used to coat high-voltage insulators used under the condition that the voltage is higher than 69KV, and the composition has the advantages of electrical leakage inhibition, sparking inhibition, improvement of the electrical property in a polluted and moist environment and excellent anticreep performance.
Description
Technical field
The invention relates to a kind of synthetics and compound method and application of high voltage insulator coating; it is to use the organic poly-silicone rubber synthetics of a room temperature vulcanizing type; under general room temperature, carry out crosslinking reaction, form a protective layer, can improve its electrical properties in the high voltage insulator surface.
Background technology
As everyone knows, traditional high voltage insulator is generally the structure of porcelain and glass, and porcelain and glass produce the arbitrary shape of insulant outward appearance easily, under general situation, the insulant of porcelain and glass structure is exposed to extraneous light contamination no matter be, electric stress and electric leakage situation, can both be arranged one long work-ing life, but if when being polluted, in order to prevent the situation of excessive electric leakage, the compound of regular cleaning or coating one deck silicon shape is necessary, become electric power major obstacle without interruption so isolator pollutes, aspect glass and ceramics insulator, usually in power system, used, when the climate condition of humidity makes insulator surface or pollutent occurs, uncontrollable leaky be can produce, as shown in Figure 1, and electronics arcing or power breakdown caused.
The loss that this type power breakdown is caused is very serious, for example, continue 1/4th seconds power breakdown, can be so that the shut-down of the manufactory of a semiconductor crystal wafer, cause a few hours machinery to stop to produce, and may cause structure deteriorate, on wafer production, cause the loss of millions of unit meter.
Had at present most organopolysiloxane rubber compositions of planting the coating of the electrical specification that improves electronic body to be disclosed, in all publications, hibbsite is pointed out to have the electrical specification of improvement electronic body.
As Niemi in United States Patent (USP) the 4th, 476, in No. 155, described that a kind of the mean particle size of its synthetics is 5 μ m by having mixed the polydimethylsiloxane that contains the hydrogen-oxygen terminal group and the synthetics of hibbsite, its leaky is less, as shown in Figure 2, its major defect is:
Grind to form the following fineness of 5 μ m, manufacturing cost is higher, is not suitable for using widely;
Adkins is in United States Patent (USP) the 4th, 822, disclose in No. 830 in organic poly-silicone rubber that to add the granular size scope be 2-10 μ m, and after best granular size scope is the hibbsite of 2-5 μ m, have the resistivity of improving cementability, contact angle, accelerating maturing speed, the electric arc resistance of improving, long service life, anti-arc and improving electric leakage.Its major defect is:
Grind to form the following fineness of 2-10 μ m, manufacturing cost is higher, is not suitable for using widely;
Mistry is at United States Patent (USP) the 5th, 326, provides that to add mean particle size in the organic poly-silicone rubber be the hibbsite of 13m in No. 804, has the improvement electrical specification, and its major defect is:
Its result of use is relatively poor, and the electric leakage degree is higher, as shown in Figure 3.
General assessment coating usefulness and about application isolator usefulness the best and worst-ranking, effective means is to impose fixing high-tension energy, observe it in testing chamber continuity salt fog phenomenon, nozzle in the testing chamber, with high-pressure air gasification fixedly salinity salt solution and produce salt fog, isolator imposes energy with high voltage variable electrical equipment, the insulator coating surface is subjected to continuous salt fog influence, and the situation of generation leakage current, monitor with Data Collection System, consult shown in Figure 1, its be isolator the ceramic coating surface leakage electrically and the variation diagram of salt fog time, as shown in Figure 1-Figure 3, it has shown typical results.
Therefore, how a kind of synthetics of high voltage insulator coating of novelty is proposed at the problems referred to above, not only can improve the electrical properties of high voltage insulator when polluting, can improve electrical properties when humidity again, be not to use for a long time the person eagerly to look forward to and the inventor is devoted to the problem that will solve always, the inventor is based on the research of engaging in isolator coating related products for many years, exploitation and sell practical experience, through research and design, special topic discussion in many ways, create technical scheme of the present invention finally.
Summary of the invention
Main purpose of the present invention provides a kind of synthetics and compound method and application of high voltage insulator coating, the high voltage insulator coating of organic poly-silicone rubber of the present invention, it mainly is used in the above high-voltage insulator insulation of 69KV coating, reaching provides the high voltage insulator coating with bigger opposing leakage current characteristic, and when pollution or humidity, the purpose that its electrical properties can't be influenced.
Second purpose of the present invention provides a kind of synthetics of high voltage insulator coating, and the high voltage insulator coating of organic poly-silicone rubber of its formation reaches the purpose that suppresses electric leakage and arcing generation.
The 3rd purpose of the present invention provides a kind of synthetics of high voltage insulator coating, the high voltage insulator coating of organic poly-silicone rubber of its formation, the purpose of the electrical properties when reaching improvement pollution and humidity.
The 4th purpose of the present invention provides a kind of application of synthetics of high voltage insulator coating, and the high voltage insulator coating of organic poly-silicone rubber of its formation reaches the purpose with bigger anti-electric leakage.
The object of the present invention is achieved like this: a kind of synthetics of high voltage insulator coating is characterized in that: it contains the exsiccant hydrocarbon cosolvent of adhesion promoters, 0.08-0.15 condensation catalyst and 5-35 of organosilicon cross-linking agent, the 0.5-1.5 of weighting material, the 1-3 of dyestuff paste, the 1.5-2.5 of exsiccant hibbsite, the 2-3.6 of polydimethylsiloxane, the 31-35 of following compositions in portion by weight: 28-32; The particulate size of this exsiccant hibbsite is 8-10 μ m.
The structural formula of this polydimethylsiloxane is HO[(CH
3)
2SiO]
nOH, wherein n is its polymerization degree, below 500.The content of this polydimethylsiloxane is the 29-31 parts by weight.This polydimethylsiloxane is 18-22Pa.S in 25 ℃ viscosity.The content of this exsiccant hibbsite is the 31-34 parts by weight.This exsiccant hibbsite be contain 34.5% combination water aluminium sesquioxide.The proportion of this exsiccant hibbsite is 2.42g/cm
3This dyestuff paste be selected from titanium dioxide or acetylene black one of them mix with polydimethylsiloxane.This dyestuff paste is 1Pa.S in 25 ℃ viscosity.This weighting material is SiO
2, proportion is 2.2g/cm
3, the particulate size is 0.5-10 μ m.The content of this weighting material is the 1.5-2.0 parts by weight.The content of this organosilicon cross-linking agent is the 1.6-2.0 parts by weight.The molecular formula of this organosilicon cross-linking agent is: R
1Si (CH=CR
2)
3, R wherein
1With R
2Be alkyl.The content of this adhesion promoters is the 0.6-1.0 parts by weight.The molecular formula of this adhesion promoters is H
2N (CH
2)
2NH (CH
2)
3Si (OMe)
3, wherein Me is a methyl.The content of this condensation catalyst is the 0.08-0.10 parts by weight.This condensation catalyst is an organic tin salt.The molecular formula of this organic tin salt is (C
4H
9)
2Sn (00CC
10H
20CH
3)
2This exsiccant hydrocarbon cosolvent is a naphtha.This exsiccant hydrocarbon cosolvent is mainly as the dispersion media of synthetics.
A kind of compound method of synthetics of high voltage insulator coating, it is characterized in that: it comprises the steps: polydimethylsiloxane, exsiccant hibbsite, dyestuff paste and each composition of exsiccant hydrocarbon cosolvent are put in the reactor under anhydrous state, reacts 15 minutes; Organosilicon cross-linking agent and adhesion promoters are added subsequently, stirred 15 minutes; Weighting material is slowly added again, stirred 15 minutes; At last, condensation catalyst is added again, stirred 10 minutes; The synthetics of gained is with airtight metal tin packing and storing.
A kind of application of synthetics of high voltage insulator coating, it is characterized in that: when this synthetics is applied on the isolator, via spraying, coating and dip-dye one of them, at room temperature reach and carry out crosslinking reaction under the normal atmosphere, form the elastomer coating of a kind of bond to insulator surface.
The present invention provides one under contaminated and moisture conditions, has organic poly-silicone rubber synthetics and the manufacture method and the application of the high-voltage electronic body coated material of improvement electrical specification.
Describe in detail below in conjunction with preferred embodiment and accompanying drawing.
Description of drawings
Fig. 1 be the prior art isolator the ceramic coating surface leakage electrically and the variation diagram of salt fog time;
Fig. 2 be prior art United States Patent (USP) 4,476,155 organopolysiloxane elastomer coating surface leakage electrically and the variation synoptic diagram of salt fog time;
Fig. 3 be prior art United States Patent (USP) 5,326,804 organopolysiloxane elastomer coating surface leakage electrically and the variation synoptic diagram of salt fog time;
Fig. 4 is the preparation process synoptic diagram of synthetics of the present invention;
Fig. 5 is the variation synoptic diagram of ceramic surface electric leakage property and hibbsite filler particle size;
Fig. 6 be organopolysiloxane elastomer coating surface leakage of the present invention electrically and the variation synoptic diagram of salt fog time.
Embodiment
Consult Fig. 4-shown in Figure 6, at first, the relation of experiment filler particle size and leakage current.Be suspended on ceramics insulator in the SaltSprayTest chamber and execute the energy of 10KV (400V/cm), salt fog comes from the salt solution of gasification, and its conductance is 250 μ S/cm, and leakage current monitors with Data Collection System.
Consult shown in Figure 5, it is the variation diagram of ceramic surface electric leakage property and hibbsite filler particle size, isolator changes weighting material from 1-13 μ m via under the above-mentioned 400V/cm with different mean sizes, hangs the relation of the mean particle size of leakage current generation required time and hibbsite weighting material on the ceramics insulator coatingsurface;
The granular size of SU-101 is 4.5 μ m, and its electric leakage time is promptly can leak electricity within 100 hours;
The SU-103 granular size is 9 μ m, and its electric leakage time is promptly can leak electricity within 200-250 hour;
The big 13 μ m of the particle of SU-104, its electric leakage time is promptly can leak electricity within 100-150 hour;
The granular size of SU-105 is 1 μ m, and its electric leakage time is promptly can leak electricity within 50-100 hour;
Show from above-mentioned experiment:
Weighting material all can cause the generation of leakage current, so its ideal granular size scope 8-11 μ m is the best with 9 μ m at short notice no matter be greater than or less than best size.So in the technical scheme of the present invention, select comparatively ideal granular size scope 8-11 μ m, be the best with 9 μ m.
Organopolysiloxane synthetics of the present invention is to mix each composition to form under the exsiccant air, under malaria, to the siloxanes of aqueous vapor sensitivity crosslinking reaction can take place, thus must keep anhydrous gaseity when synthetic, before slaking reaction.
Consult shown in Figure 4ly, it is the schematic flow sheet of preferred embodiment of the present invention, and the concrete preparation procedure step of the synthetics of high voltage insulator coating of the present invention is as follows:
Step 1: with the polydimethylsiloxane of the hydrogen-oxygen terminal group of 30 parts by weight, viscosity is 20Pa.S in the time of its 25 ℃, it is added 33 parts by weight and the particulate size is that 9 μ m and proportion are 2.42g/cm
3Exsiccant hibbsite weighting material in, and this hibbsite is the aluminium sesquioxide that contains 34.5% combination water; The white dyestuff paste that adds the polydimethylsiloxane that contains titanium dioxide, methyl terminal group of 2.4 parts by weight then, viscosity is 1Pa.S in the time of its 25 ℃, and add the exsiccant naphtha solvent of 30 parts by weight, slowly mix 15 minutes to form base comp;
Step 2: the organosilicon cross-linking agent [methyl trik-(methylethyl ketoxime) silane] that adds 1.8 parts by weight then, with the adhesion promoters [N (2-aminoethyl-3-aminopropyl) trimethoxysilane] of 0.8 parts by weight, add this base comp and stirred 15 minutes;
Step 3: slowly add 1.9 parts by weight proportions and be 2.2 weighting material SiO
2, its granular size is 0.5 to 1.5 μ m, about 15 minutes of high-speed stirring;
Step 4: add the condensation catalyst [disbutyltindi laurate] of 0.1 parts by weight at last, stir about 10 minutes.
The synthetics of gained is the organopolysiloxane rubber composition, range of viscosities is 1 to 1.5Pa.S in the time of 25 ℃, be 30 minutes the duration of contact (Tack Free Time) under 25 ℃ of relative humidity 50%, and the skinning time (Skin over Time) under 25 ℃ of relative humidity 50% is 15 minutes.
Organopolysiloxane rubber composition of the present invention, with airtight metal tin packing and storing, this synthetics is at the stabile material of saving as of exsiccant air, when it is applied in isolator,, under general room temperature, can carry out crosslinking reaction via spraying, coating or dip-dye, form the elastomer coating of a kind of bond at insulator surface, it provides the high voltage insulator coating with bigger opposing leakage current characteristic, and is polluting or when moist, its electrical properties can't be influenced.
Certainly, each composition of organopolysiloxane rubber composition of the present invention can arbitrarily conversion proportioning, and for example the compositions in portion by weight proportioning is as follows:
The polydimethylsiloxane of 29-31;
The exsiccant hibbsite of 31-34;
2.5-3.0 the dyestuff paste;
1.5-2.0 weighting material;
1.6-2.0 organosilicon cross-linking agent;
0.6-1.0 adhesion promoters;
0.08-0.10 condensation catalyst;
The exsiccant hydrocarbon cosolvent of 10-30.
Experimental results show that; Can also change composition proportion wherein arbitrarily as required, or use and the similar surrogate of mentioned component, the effect that all is well used, since similar, so do not repeat.
Consult Fig. 6, its be organopolysiloxane elastomer coating surface leakage of the present invention electrically and the variation diagram of salt fog time, when having proved that application of paints of the present invention is to isolator, the leakage current degree is lower than prior art formula coating.
In sum; the invention relates to a kind of synthetics of high voltage insulator coating; it is to use a room temperature vulcanizing type organopolysiloxane rubber composition, can carry out crosslinking reaction and form a protective layer in the high voltage insulator surface under general room temperature, can improve its electrical properties.So the present invention one has the innovative technology of novelty, creativeness and industrial utilization.
The above is preferred embodiment of the present invention only, is not to be used for limiting scope of the invention process, and all equalizations of doing according to described feature of the scope of the invention and spirit change and modify, and all should be included within protection scope of the present invention.
Claims (22)
1, a kind of synthetics of high voltage insulator coating is characterized in that: it contains following compositions in portion by weight:
The exsiccant hydrocarbon cosolvent of adhesion promoters, 0.08-0.15 condensation catalyst and the 5-35 of the weighting material of the exsiccant hibbsite of the polydimethylsiloxane of 28-32,31-35, the dyestuff paste of 2-3.6,1.5-2.5, the organosilicon cross-linking agent of 1-3,0.5-1.5; The particulate size of this exsiccant hibbsite is 8-10 μ m.
2, the synthetics of high voltage insulator coating according to claim 1 is characterized in that: the structural formula of this polydimethylsiloxane is HO[(CH
3)
2SiO]
nOH, wherein n is the polymerization degree, below 500.
3, the synthetics of high voltage insulator coating according to claim 1 is characterized in that: the content of this polydimethylsiloxane is the 29-31 parts by weight.
4, the synthetics of high voltage insulator coating according to claim 1 is characterized in that: this polydimethylsiloxane is 18-22Pa.S in 25 ℃ viscosity.
5, the synthetics of high voltage insulator coating according to claim 1 is characterized in that: the content of this exsiccant hibbsite is the 31-34 parts by weight.
6, the synthetics of high voltage insulator coating according to claim 1 is characterized in that: this exsiccant hibbsite be contain 34.5% combination water aluminium sesquioxide.
7, the synthetics of high voltage insulator coating according to claim 1 is characterized in that: the proportion of this exsiccant hibbsite is 2.42g/cm
3
8, the synthetics of high voltage insulator coating according to claim 1 is characterized in that: this dyestuff paste be selected from titanium dioxide or acetylene black one of them mix with polydimethylsiloxane.
9, the synthetics of high voltage insulator coating according to claim 1 is characterized in that: this dyestuff paste is 1Pa.S in 25 ℃ viscosity.
10, the synthetics of high voltage insulator coating according to claim 1 is characterized in that: this weighting material is SiO
2, proportion is 2.2g/cm
3, the particulate size is 0.5-10 μ m.
11, the synthetics of high voltage insulator coating according to claim 1 is characterized in that: the content of this weighting material is the 1.5-2.0 parts by weight.
12, the synthetics of high voltage insulator coating according to claim 1 is characterized in that: the content of this organosilicon cross-linking agent is the 1.6-2.0 parts by weight.
13, the synthetics of high voltage insulator coating according to claim 1 is characterized in that: the molecular formula of this organosilicon cross-linking agent is: R
1Si (CH=CR
2)
3, R wherein
1With R
2Be alkyl.
14, the synthetics of high voltage insulator coating according to claim 1 is characterized in that: the content of this adhesion promoters is the 0.6-1.0 parts by weight.
15, the synthetics of high voltage insulator coating according to claim 1 is characterized in that: the molecular formula of this adhesion promoters is H
2N (CH
2)
2NH (CH
2)
3Si (OMe)
3, wherein Me is a methyl.
16, the synthetics of high voltage insulator coating according to claim 1 is characterized in that: the content of this condensation catalyst is the 0.08-0.10 parts by weight.
17, the synthetics of high voltage insulator coating according to claim 1 is characterized in that: this condensation catalyst is an organic tin salt.
18, the synthetics of high voltage insulator coating according to claim 17 is characterized in that: the molecular formula of this organic tin salt is (C
4H
9)
2Sn (OOCC
10H
20CH
3)
2
19, the synthetics of high voltage insulator coating according to claim 1 is characterized in that: this exsiccant hydrocarbon cosolvent is a naphtha.
20, the synthetics of high voltage insulator coating according to claim 1 is characterized in that: this exsiccant hydrocarbon cosolvent is mainly as the dispersion media of synthetics.
21, the compound method of the synthetics of the described high voltage insulator coating of a kind of claim 1, it is characterized in that: it comprises the steps: parts by weight is that the polydimethylsiloxane of 28-32, the exsiccant hibbsite of 31-35, the dyestuff paste of 2-3.6 and each composition of exsiccant hydrocarbon cosolvent of 5-35 are put into reactor under anhydrous state, reacts 15 minutes; The organosilicon cross-linking agent of 1-3 and the adhesion promoters of 0.5-1.5 are added subsequently, stirred 15 minutes; The weighting material of 1.5-2.5 is slowly added again, stirred 15 minutes; At last, the condensation catalyst of 0.08-0.15 is added again, stirred 10 minutes; The synthetics of the high voltage insulator coating of gained is with airtight metal tin packing and storing.
22, the application of the synthetics of the described high voltage insulator coating of a kind of claim 1, it is characterized in that: when this synthetics is applied on the isolator, via spraying, coating and contaminate one of them, under room temperature and normal pressure, carry out crosslinking reaction, form the elastomer coating of a kind of bond to insulator surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01124282 CN1264938C (en) | 2001-08-23 | 2001-08-23 | High voltage insulator coating composition and preparation and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01124282 CN1264938C (en) | 2001-08-23 | 2001-08-23 | High voltage insulator coating composition and preparation and application thereof |
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| CN1264938C true CN1264938C (en) | 2006-07-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101821818B (en) * | 2007-10-08 | 2013-10-30 | Abb研究有限公司 | Surface modified electrical insulation system with improved tracking and erosion resistance |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101177588B (en) * | 2007-10-29 | 2010-11-17 | 南京优玛贸易有限公司 | Special caring agent for automobile engine lines and preparation method thereof |
| CN101260278B (en) * | 2008-04-23 | 2010-06-16 | 成都硅宝科技股份有限公司 | Method for preparing high storage stability room temperature dehydration sulfureted organic silicon coat |
| CN101591504B (en) * | 2008-05-30 | 2011-12-28 | 成都拓利正基材料科技有限公司 | Single-component organic silicon flame-retardant coating type paint |
-
2001
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101821818B (en) * | 2007-10-08 | 2013-10-30 | Abb研究有限公司 | Surface modified electrical insulation system with improved tracking and erosion resistance |
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| CN1407041A (en) | 2003-04-02 |
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