CN114133861B - Weather-proof and anti-icing composite insulator umbrella skirt sheath and preparation method and application thereof - Google Patents
Weather-proof and anti-icing composite insulator umbrella skirt sheath and preparation method and application thereof Download PDFInfo
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- CN114133861B CN114133861B CN202111619454.3A CN202111619454A CN114133861B CN 114133861 B CN114133861 B CN 114133861B CN 202111619454 A CN202111619454 A CN 202111619454A CN 114133861 B CN114133861 B CN 114133861B
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/02—Suspension insulators; Strain insulators
- H01B17/04—Chains; Multiple chains
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/38—Fittings, e.g. caps; Fastenings therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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Abstract
The invention provides a weather-resistant and anti-icing composite insulator shed sheath and a preparation method and application thereof, wherein the composite insulator shed sheath is prepared from specific parts of a combination of hexafunctional group urethane acrylate, light-moisture dual-curing acrylate, fluorine modified acrylate, trimethylolpropane triacrylate, isobornyl acrylate and an initiator; through mutual collocation of the components, the obtained composite insulator umbrella skirt sheath has the advantages of high curing speed and completeness, the surface tension is low, the composite insulator umbrella skirt sheath further has excellent anti-icing performance, the hardness is high, the wear resistance and the weather resistance are excellent, and the application requirement of long-term exposure in outdoor severe environment is completely met.
Description
Technical Field
The invention belongs to the technical field of insulators, and particularly relates to a weather-resistant and anti-icing composite insulator umbrella skirt sheath as well as a preparation method and application thereof.
Background
Line insulators are mainly classified into three types, including composite insulators, glass insulators, and ceramic insulators. The composite insulator is a novel insulator which is developed rapidly in recent years and is applied more and more widely in the power department, the composite insulator is composed of a core rod, an umbrella skirt sheath and a hardware fitting, and the umbrella skirt sheath is used as an external insulation part of the composite insulator and mainly composed of silicon rubber or fluororubber materials.
The shed sheath needs to be exposed to outdoor severe environment for a long time, so that the shed sheath needs to have good weather resistance, and meanwhile, in rainy and snowy weather, particularly rainy and snowy freezing severe weather, the insulator also needs to have good ice and sleet resistance. Therefore, the ice-coating-proof material is coated on the umbrella skirt sheath of the composite insulator as a new method, so that the faults of equipment damage, power-on lines and the like caused by ice coating accumulation can be effectively prevented, and the composite insulator has good wear resistance and weather resistance.
At present, the common method is mainly to add filler or anti-aging agent on the material of the umbrella skirt sheath and adjust fluorine or silicon rubber in the material. CN105001470A discloses a reinforced umbrella skirt sheath base material and a preparation method of an umbrella skirt sheath, wherein the reinforced umbrella skirt sheath base material comprises the following components in parts by weight: 20-40 parts of isoprene rubber and/or butadiene rubber, 5-10 parts of ammonium phosphate flame retardant, 8-12 parts of magnesium hydroxide, 3-8 parts of antioxidant 1010, 3-12 parts of sensitizer, 2-7 parts of stabilizer and 5-20 parts of filler silicon dioxide or aluminum trioxide; the umbrella skirt prepared by the method has better mechanical property, insulating property and flame retardant property. CN112143172A discloses an insulator sheath material with low water absorption and a preparation method thereof, wherein the insulator sheath material with low water absorption comprises the following components in parts by weight: 100-200 parts of epoxy resin; 80-100 parts of curing agent; 0.1-1 part of an accelerant; 30-100 parts of filler; wherein the filler is modified aluminum hydroxide with 2000 meshes and/or 8000 meshes. According to the invention, aluminum hydroxide with a small mesh number is added on the basis of the epoxy resin sheath material, so that the water absorption rate of the sheath material can be greatly reduced, the service life of the epoxy resin insulator is prolonged, and the safe operation of a power transmission line is ensured. CN112980148A discloses a composite insulator low temperature resistant hard sheath alicyclic epoxy resin injection material and preparation method, which comprises: epoxy resin, a curing agent, a toughening agent, an accelerator, a flame retardant, a silane coupling agent, silicon dioxide and aluminum hydroxide filler; the epoxy resin comprises a material a and a material b, wherein the material a accounts for 30-95% of the weight of the epoxy resin, the material b accounts for 5-70% of the weight of the epoxy resin, the material a is one or more of 3, 4-epoxy cyclohexyl formic acid-3 ',4' -epoxy cyclohexyl methyl ester, bis ((3, 4-epoxy cyclohexyl) methyl) adipate, a polymerization product of 3, 4-epoxy cyclohexyl methyl-3, 4-epoxy cyclohexyl methyl formate and caprolactone, cyclohexane-1, 2-dicarboxylic acid diglycidyl ester and hydrogenated bisphenol A epoxy resin, and the material b is one or more of polyether polyol, polyethylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether and epoxy terminated polyether. The hard sheath made of the injection material has better tensile property and low temperature resistance, and avoids cracking when bearing tensile load.
However, the sheath material provided in the prior art still needs to be improved in weather resistance, and is difficult to be applied outdoors in harsh environment for a long time, so that the service life of the shed sheath is short, and the cost is high.
Therefore, it is an urgent technical problem in the art to develop a composite insulator shed sheath having excellent weather resistance, anti-icing property and wear resistance.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a weather-resistant and ice-coating-resistant composite insulator shed sheath and a preparation method and application thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
on the first aspect, the invention provides a weather-resistant and anti-icing composite insulator shed sheath, which comprises the following raw materials in parts by weight:
wherein the hexafunctional urethane acrylate may be 21 parts by weight, 22 parts by weight, 23 parts by weight, 24 parts by weight, 25 parts by weight, 26 parts by weight, 27 parts by weight, 28 parts by weight, 29 parts by weight, or the like.
The photo-moisture dual-curable acrylate may be 16 parts by weight, 17 parts by weight, 18 parts by weight, 19 parts by weight, 20 parts by weight, 21 parts by weight, 22 parts by weight, 23 parts by weight, 24 parts by weight, 25 parts by weight, or the like.
The fluorine-modified acrylate may be 21 parts by weight, 22 parts by weight, 23 parts by weight, 24 parts by weight, 25 parts by weight, 26 parts by weight, 27 parts by weight, 28 parts by weight, 29 parts by weight, or the like.
The trimethylolpropane triacrylate may be 17, 19, 21, 23, 25, 27, 29, or the like.
The isobornyl acrylate may be 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight, 10 parts by weight, 11 parts by weight, 12 parts by weight, 13 parts by weight, 14 parts by weight, or the like.
The initiator may be 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, or 10.5 parts by weight, or the like.
Firstly, the weather-resistant anti-icing composite insulator shed sheath provided by the invention can improve the curing efficiency of the material by introducing hexa-functional group urethane acrylate into the preparation raw materials, increase the crosslinking density of the material, enable the material to easily form a compact structure, improve the density of the material, and further improve the scratch resistance and wear resistance of the prepared shed sheath; secondly, by introducing light-moisture dual-curing acrylate into the preparation raw materials, the component shape limited shadow region can be cured, the light-moisture dual-curing has good synergistic effect, the problem that the component shape is difficult to cure due to the shape shadow can be solved, and the curing is more comprehensive; finally, fluorine modified acrylate resin with a specific part is added in the preparation raw materials, so that the composite insulator shed sheath has good weather resistance, stain resistance and icing resistance, and the service life of the composite insulator shed sheath in outdoor use is obviously prolonged.
Preferably, the initiator comprises a combination of 2-hydroxy-2-methyl-1-phenyl-1-propanone (photoinitiator 1173) and (2, 4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide (photoinitiator TPO).
As a preferred technical scheme of the invention, the combination of the photoinitiator 1173 and the photoinitiator TPO is selected as the initiator, so that the purpose of the photoinitiator 1173 is that the surface curing is short-wavelength, the purpose of the photoinitiator TPO is deep curing, and the purpose of the photoinitiator is long-wavelength, and the combination of the two can enable the curing effect to be more excellent. Preferably, the content of the 2-hydroxy-2-methyl-1-phenyl-1-propanone in the raw materials for preparing the shed sheath of the composite insulator is 5 to 10 parts by weight, such as 5.5 parts by weight, 6 parts by weight, 6.5 parts by weight, 7 parts by weight, 7.5 parts by weight, 8 parts by weight, 8.5 parts by weight, 9 parts by weight or 9.5 parts by weight.
Preferably, the (2, 4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide is contained in an amount of 0.2 to 1 part by weight, for example, 0.3 part by weight, 0.4 part by weight, 0.5 part by weight, 0.6 part by weight, 0.7 part by weight, 0.8 part by weight, or 0.9 part by weight, etc., in the raw material for preparing the shed sheath for a composite insulator.
Preferably, the raw materials for preparing the umbrella skirt sheath of the composite insulator further comprise a solvent and a leveling agent.
Preferably, the solvent is a mixed solvent.
Preferably, the mixed solvent includes a combination of ethyl acetate, butyl acetate, and ethylene glycol monobutyl ether.
Preferably, the mass ratio of the ethyl acetate to the butyl acetate to the ethylene glycol monobutyl ether is 3 (2-4) to 1-3.
Wherein the mass ratio of ethyl acetate to butyl acetate can be 3.
The mass ratio of ethyl acetate to ethylene glycol monobutyl ether can be 3.
Preferably, the content of the solvent in the raw materials for preparing the shed sheath of the composite insulator is 40-60 parts by weight, such as 42 parts by weight, 44 parts by weight, 46 parts by weight, 48 parts by weight, 50 parts by weight, 52 parts by weight, 54 parts by weight, 56 parts by weight or 58 parts by weight.
Preferably, the leveling agent comprises polyether modified polydimethylsiloxane.
Preferably, the leveling agent is contained in the raw material for preparing the shed sheath of the composite insulator in an amount of 0.2 to 1 part by weight, for example, 0.3 part by weight, 0.4 part by weight, 0.5 part by weight, 0.6 part by weight, 0.7 part by weight, 0.8 part by weight, or 0.9 part by weight.
In a second aspect, the invention provides a method for preparing the shed sheath of the composite insulator as described in the first aspect, the method comprising the following steps:
(1) Mixing hexafunctional group urethane acrylate, light-moisture dual-curing acrylate, fluorine modified acrylate, trimethylolpropane triacrylate, isobornyl acrylate, an initiator, an optional solvent and an optional leveling agent, and filtering to obtain a coating solution;
(2) And (2) coating the coating liquid obtained in the step (1) on a base material, and performing thermosetting and photocuring to obtain the composite insulator umbrella skirt sheath.
Preferably, the mixing of step (1) is carried out under stirring.
Preferably, the mixing of step (1) is carried out under ambient temperature and in the absence of light.
Preferably, the mixing time in step (1) is 1-2 h, such as 1.1h, 1.2h, 1.3h, 1.4h, 1.5h, 1.6h, 1.7h, 1.8h or 1.9h, etc.
Preferably, the filtration in the step (1) is performed by using a 200-mesh filter screen.
Preferably, the temperature for the thermal curing in step (2) is 60 to 80 ℃, such as 62 ℃, 64 ℃, 66 ℃, 68 ℃,70 ℃, 72 ℃, 74 ℃, 76 ℃ or 78 ℃, etc.
Preferably, the time for the thermal curing in step (2) is 5-10 min, such as 5.5min, 6min, 6.5min, 7min, 7.5min, 8min, 8.5min, 9min or 9.5 min.
Preferably, the photocuring of step (2) is ultraviolet photocuring.
Preferably, the coating mode of the step (2) is curtain coating or spraying.
Preferably, the energy of the ultraviolet light curing is 300-500 MJ/cm 2 E.g. 320MJ/cm 2 、340MJ/cm 2 、360MJ/cm 2 、380MJ/cm 2 、400MJ/cm 2 、420MJ/cm 2 、440MJ/cm 2 、460MJ/cm 2 Or 480MJ/cm 2 And the like.
The photocuring time is preferably 10 to 15 seconds, for example, 10.55 seconds, 11 seconds, 11.5 seconds, 12 seconds, 12.5 seconds, 13 seconds, 13.5 seconds, 14 seconds, 14.5 seconds, or 14.5 seconds, and more preferably 11 to 13 seconds. Preferably, the method further comprises a step of placing at normal temperature after the photocuring is finished.
Preferably, the standing time at normal temperature is 20-26 h, such as 20.5h, 21h, 21.5h, 22h, 22.5h, 23h, 23.5h, 24h, 24.5h, 25h or 25.5 h.
As a preferred technical scheme, the preparation method of the composite insulator shed sheath provided by the invention comprises the following steps:
(1) Mixing hexa-functional group urethane acrylate, light-moisture dual-curing acrylate, fluorine modified acrylate resin, trimethylolpropane triacrylate, isobornyl acrylate, an initiator, an optional solvent and an optional leveling agent for 1-2 hours under the conditions of normal temperature and light resistance, and filtering by adopting a 200-mesh filter screen to obtain a coating solution;
(2) Coating the coating liquid obtained in the step (1) on a base material in a spraying or curtain coating mode, and performing thermocuring at 60-80 ℃ for 5-10 min at the energy of 300-500 MJ/cm 2 And (3) carrying out photocuring for 10-15 s under ultraviolet rays, and standing at normal temperature for 20-26 h to obtain the composite insulator umbrella skirt sheath.
In a third aspect, the present invention provides a use of a composite insulator shed sheath according to the first aspect in an electrical power system.
Compared with the prior art, the invention has the following beneficial effects:
(1) The preparation raw materials of the weather-resistant anti-icing composite insulator shed sheath comprise a combination of hexafunctional group urethane acrylate, light-moisture dual-curing acrylate, fluorine modified acrylate, trimethylolpropane triacrylate, isobornyl acrylate and a photoinitiator in specific parts; firstly, utilizing hexa-functional group polyurethane acrylate to improve the curing rate of the material and increase the crosslinking density of the material, thereby improving the hardness and wear-resisting property of the umbrella skirt sheath of the composite insulator; the problem that a shadow area is difficult to be completely cured due to the shape is solved by matching the light-moisture dual-curing acrylate with a dual-curing system and utilizing the synergistic effect of different curing mechanisms, so that the curing is more comprehensive; in addition, fluorine modified acrylate resin is introduced, so that the surface tension of the shed sheath of the composite insulator is reduced, the water contact angle of the surface of the shed sheath is increased, and the anti-icing effect and the weather resistance of the shed sheath are improved.
(2) Specifically, the pencil hardness of the umbrella skirt sheath of the composite insulator is 1H-2H, the adhesion force is as high as 3B-5B, the wear resistance is 3500-5000 g, the water contact angle is 108-115 degrees, and the weather resistance test delta B is 2.1-3.5.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitation of the present invention.
Example 1
A weather-resistant and anti-icing composite insulator umbrella skirt sheath comprises the following components in parts by weight:
the preparation method of the umbrella skirt sheath of the composite insulator provided by the embodiment comprises the following steps:
(1) Mixing hexa-functional group urethane acrylate (yot, FSP 8293), photo-moisture dual-curing acrylate (zechner, ebecryl 4150), fluorine-modified acrylate (chang, 61998), trimethylolpropane triacrylate, isobornyl acrylate, an initiator 1173, an initiator TPO, a solvent (composed of ethyl acetate, butyl acetate and ethylene glycol monobutyl ether in a mass ratio of 3;
(2) Spraying the coating liquid obtained in the step (1) on a substrate, baking for 7.5min at 70 ℃, wherein the energy is 400MJ/cm 2 And (3) curing for 12s by ultraviolet irradiation, and standing at normal temperature for 24h to obtain the composite insulator umbrella skirt sheath.
Example 2
A weather-resistant and anti-icing composite insulator umbrella skirt sheath comprises the following components in parts by weight:
the preparation method of the umbrella skirt sheath of the composite insulator provided by the embodiment comprises the following steps:
(1) Mixing hexafunctional group urethane acrylate (yoro, FSP 8293), light-moisture dual-curing acrylate (Zhanxin, ebecryl 4150), fluorine modified acrylate (Changxing, 61998), trimethylolpropane triacrylate, isobornyl acrylate, an initiator 1173, an initiator TPO, a solvent (consisting of ethyl acetate, butyl acetate and ethylene glycol monobutyl ether in a mass ratio of 3;
(2) Spraying the coating liquid obtained in the step (1) on a base material, baking for 10min at 60 ℃, wherein the energy is 300MJ/cm 2 And (3) curing for 12s by ultraviolet irradiation, and standing at normal temperature for 24h to obtain the composite insulator umbrella skirt sheath.
Example 3
A weather-resistant and anti-icing composite insulator umbrella skirt sheath comprises the following components in parts by weight:
the preparation method of the composite insulator shed sheath provided by the embodiment comprises the following steps:
(1) Mixing hexafunctional group urethane acrylate (yoro, FSP 8293), light-moisture dual-curing acrylate (Zhanxin, ebecryl 4150), fluorine modified acrylate (Changxing, 61998), trimethylolpropane triacrylate, isobornyl acrylate, an initiator 1173, an initiator TPO, a solvent (consisting of ethyl acetate, butyl acetate and ethylene glycol monobutyl ether in a mass ratio of 3;
(2) The coating liquid obtained in the step (1) is coated on a base material in a curtain coating mode, and the base material is baked for 5min at the temperature of 80 ℃, wherein the energy is 300MJ/cm 2 And (3) curing for 12s by ultraviolet irradiation, and standing at normal temperature for 24h to obtain the composite insulator umbrella skirt sheath.
Example 4
A weather-resistant and anti-icing composite insulator shed sheath is different from that of example 1 only in that an initiator 1173 is not added, the addition amount of an initiator TPO is 8 parts by weight, and other components, the use amounts and the preparation method are the same as those of example 1.
Example 5
The weather-resistant and ice-coating-resistant composite insulator shed sheath is different from that of example 1 only in that no initiator TPO is added, the addition amount of the initiator 1173 is 8 parts by weight, and other components, the use amounts and the preparation method are the same as those of example 1.
Comparative example 1
A weather-resistant and ice-covering-resistant composite insulator shed sheath is different from that in example 1 in that monofunctional urethane acrylate (Changxing, 61758) is adopted to replace hexafunctional urethane acrylate, and other components, the using amount and the preparation method are the same as those in example 1.
Comparative example 2
A weather-resistant and anti-icing composite insulator shed sheath is different from that in example 1 in that bifunctional urethane acrylate (Changxing, 6112-100) is adopted to replace the hexafunctional urethane acrylate, and other components, the using amount and the preparation method are the same as those in example 1.
Comparative example 3
A weather-resistant and anti-icing composite insulator shed sheath is different from that of example 1 in that light-moisture dual-curing acrylate is replaced by light-curing acrylate (Sandoma, CN 996), and other components and using amounts are the same as those of example 1;
the preparation method of the composite insulator shed sheath provided by the comparative example comprises the following steps:
(1) Mixing hexa-functional group urethane acrylate (Ruinor, FSP 8293), photocuring acrylate (Sartomer, CN 996), fluorine modified acrylate resin (Changxing, 61998), trimethylolpropane triacrylate, isobornyl acrylate, an initiator 1173, an initiator TPO, a solvent (consisting of ethyl acetate, butyl acetate and ethylene glycol monobutyl ether in a mass ratio of 3;
(2) The coating liquid obtained in the step (1) is coated on a base material in a flow coating mode, and the energy is 400MJ/cm 2 And (3) curing for 12s by ultraviolet irradiation, and standing at normal temperature for 24h to obtain the composite insulator umbrella skirt sheath.
Comparative example 4
A weather-resistant anti-icing composite insulator umbrella skirt sheath is different from that of the composite insulator umbrella skirt sheath in example 1 in that moisture curing acrylate (Dongguan macro, HD-611) is adopted to replace light-moisture dual curing acrylate, and other components and the using amount are the same as those of the composite insulator umbrella skirt sheath in example 1;
the preparation method of the composite insulator umbrella skirt sheath provided by the comparative example comprises the following steps:
(1) Mixing hexa-functional group urethane acrylate (Ruinox, FSP 8293), moisture curing acrylate (Dongguan macro, HD-611), fluorine modified acrylate resin (Changxing, 61998), trimethylolpropane triacrylate, isobornyl acrylate, an initiator 1173, an initiator TPO, a solvent (consisting of ethyl acetate, butyl acetate and ethylene glycol monobutyl ether with a mass ratio of 3;
(2) And (2) spraying the coating liquid obtained in the step (1) on a base material, baking at 70 ℃ for 7.5min, and standing at normal temperature for 24h to obtain the umbrella skirt sheath of the composite insulator.
Comparative example 5
A weather-resistant and anti-icing composite insulator shed sheath is different from that in example 1 in that fluorine modified acrylate is not added, and other components, the weight ratio of the components and the preparation method are the same as those in example 1.
And (4) performance testing:
(1) Adhesion force: testing was carried out according to the test method provided in Standard ASTM D3363-00 (3M-600);
(2) Weather resistance: testing the yellowing value delta b after UV irradiation of 1W/m for 200 h;
(3) Water contact angle: testing was performed according to the test method provided in standard ASTM D5946-2009;
(4) Pencil hardness: testing is carried out according to the method provided in the standard GB/T6739-2006;
(5) Wear resistance: the mass number of scratches generated by different weights.
The composite insulator shed sheaths obtained in examples 1 to 5 and comparative examples 1 to 5 were tested according to the above test method, and the test results are shown in table 1:
according to the data in table 1, the weather-resistant and ice-covering-resistant composite insulator shed sheath provided by the invention has the advantages of higher hardness and wear resistance, larger water contact angle, excellent hydrophobicity, smaller yellowing resin, excellent weather resistance and higher adhesive force.
Specifically, the composite insulator shed sheaths obtained in examples 1 to 5 have pencil hardness of 1H to 2H, adhesion force of 3B to 5B, abrasion resistance of 3500 to 5000g, water contact angle of 108 to 115 degrees and weather resistance test Delta B of 2.1 to 3.5.
Comparing example 1, comparative example 1 and comparative example 2, it can be seen that the pencil hardness of the shed sheath of the composite insulator obtained by replacing hexa-functional urethane acrylate with mono-functional urethane acrylate (comparative example 1) and di-functional urethane acrylate (comparative example 2) is greatly reduced, and the abrasion resistance and weather resistance are also poor.
Comparing example 1, comparative example 3 and comparative example 4, it can be seen that the pencil hardness of the composite insulator shed sheath obtained by using the photo-curable acrylate (comparative example 3) and the moisture-curable acrylate (comparative example 4) instead of the photo-moisture dual-curable acrylate is also greatly reduced, and the abrasion resistance and weather resistance are also poor.
Comparing example 1 with comparative example 5, it can be seen that the composite insulator shed sheath obtained without adding the fluorine modified acrylate has a small water contact angle, which indicates that the sheath has poor hydrophobicity, and a high yellowing value, which indicates that the composite insulator shed sheath has poor weather resistance.
Further comparison of examples 1 and 4 to 5 shows that the composite insulator shed sheath obtained using only one photoinitiator has reduced pencil hardness, abrasion resistance, weather resistance and hydrophobicity.
The applicant states that the invention is described by the above embodiments as a weather-resistant and ice-covering-resistant composite insulator shed sheath, and a preparation method and application thereof, but the invention is not limited to the above embodiments, that is, the invention is not limited to the above embodiments. It should be understood by those skilled in the art that any modifications of the present invention, equivalent substitutions of the raw materials of the product of the present invention, and the addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (22)
1. The weather-resistant and ice-covering-resistant composite insulator shed sheath with the water contact angle of 108-115 degrees is characterized by comprising a base material and a coating coated on the base material, wherein the coating is prepared from the following raw materials in parts by weight:
20 to 30 parts by weight of hexafunctional group urethane acrylate
15-25 parts by weight of light-moisture dual-curing acrylate
20 to 30 parts by weight of fluorine-modified acrylate
15-30 parts by weight of trimethylolpropane triacrylate
5 to 15 parts by weight of isobornyl acrylate
5.2 to 11 parts by weight of initiator
40 to 60 parts by weight of solvent
0.2 to 1 weight part of leveling agent;
the initiator comprises a combination of 2-hydroxy-2-methyl-1-phenyl-1-propanone and (2, 4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide.
2. The composite insulator shed sheath of claim 1, wherein the content of 2-hydroxy-2-methyl-1-phenyl-1-acetone in the raw materials for preparing the composite insulator shed sheath is 5 to 10 parts by weight.
3. The composite insulator shed sheath according to claim 1, wherein the content of (2, 4, 6-trimethylbenzoyl chloride) diphenylphosphine oxide in the raw materials for preparing the composite insulator shed sheath is 0.2 to 1 part by weight.
4. The composite insulator shed sheath of claim 1, wherein the solvent is a mixed solvent.
5. The composite insulator shed sheath of claim 4, wherein the mixed solvent comprises a combination of ethyl acetate, butyl acetate, and ethylene glycol monobutyl ether.
6. The umbrella-type sheath for the composite insulator of claim 5, wherein the mass ratio of the ethyl acetate to the butyl acetate to the ethylene glycol monobutyl ether is 3 (2 to 4) to (1 to 3).
7. The composite insulator shed sheath of claim 1, wherein the leveling agent comprises polyether modified polydimethylsiloxane.
8. A preparation method of the composite insulator umbrella skirt sheath as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
(1) Mixing hexa-functional group urethane acrylate, light-moisture dual-curing acrylate, fluorine modified acrylate, trimethylolpropane triacrylate, isobornyl acrylate, an initiator, a solvent and a leveling agent, and filtering to obtain coating liquid;
(2) And (2) coating the coating liquid obtained in the step (1) on a base material, and performing thermosetting and photocuring to obtain the composite insulator umbrella skirt sheath.
9. The method according to claim 8, wherein the mixing in step (1) is carried out under stirring.
10. The method according to claim 8, wherein the mixing in step (1) is carried out under ambient temperature and protected from light.
11. The method according to claim 8, wherein the mixing in step (1) is carried out for 1 to 2 hours.
12. The method according to claim 8, wherein the filtration in step (1) is performed with a 200 mesh filter screen.
13. The preparation method according to claim 8, wherein the coating in step (2) is performed by curtain coating or spray coating.
14. The method according to claim 8, wherein the temperature for the thermosetting in step (2) is 60 to 80 ℃.
15. The method according to claim 8, wherein the heat curing time in step (2) is 5 to 10 min.
16. The method according to claim 8, wherein the photo-curing of step (2) is UV photo-curing.
17. The method for preparing a polyurethane foam according to claim 16, wherein the UV curing energy is 300 to 500MJ/cm 2 。
18. The method according to claim 8, wherein the photocuring time is 10 to 15 seconds.
19. The method according to claim 8, wherein the photocuring time is 11 to 13 seconds.
20. The method according to claim 8, further comprising a step of standing at room temperature after the photocuring.
21. The preparation method according to claim 20, wherein the standing time at normal temperature is 20 to 26 hours.
22. Use of the composite insulator shed sheath of any one of claims 1 to 7 in an electric power system.
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