CN111471262A - Preparation method of low-thermal-resistance filling material for high-voltage cable - Google Patents
Preparation method of low-thermal-resistance filling material for high-voltage cable Download PDFInfo
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- CN111471262A CN111471262A CN202010416385.5A CN202010416385A CN111471262A CN 111471262 A CN111471262 A CN 111471262A CN 202010416385 A CN202010416385 A CN 202010416385A CN 111471262 A CN111471262 A CN 111471262A
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
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Abstract
The invention relates to the field of material preparation, in particular to a preparation method of a high-voltage cable low-thermal-resistance filling material; the preparation method of the high-voltage cable low-thermal-resistance filling material takes polyisoprene grafted monomethyl maleate as main base resin, takes a modified heat-conducting filler as heat-conducting particles, is formed by combining various different fillers according to a proportion, greatly improves the compatibility with organic resin materials through surface modification, can effectively improve a heat-conducting passage, reduces the interface thermal resistance and improves the thermal conductivity of the interface material; the low-thermal-resistance filling material provided by the invention is simple in use method, wide in application range, capable of being directly applied to various cable grooves and cable calandria, strong in applicability and feasible for comprehensive popularization and use.
Description
Technical Field
The invention relates to the field of material preparation, in particular to a preparation method of a low-thermal-resistance filling material for a high-voltage cable.
Background
The filling material is used for filling, because the cable core of the cable is formed by twisting a plurality of insulated wire cores, gaps are inevitably generated in the cabling process, and if the gaps are not tightly filled with the material, the cable core of the cable is unstable, and the service life of the cable in the use process is shortened.
CN108117707A discloses a cable filling material, which comprises the following raw materials in parts by weight: 50-80 parts of PVC plastic, 30-40 parts of epoxy resin, 5-10 parts of graphite, 1-8 parts of foaming agent, 2-6 parts of flame retardant, 5-15 parts of white carbon black, 6-9 parts of light calcium carbonate, 5-15 parts of hollow glass microsphere, 15-25 parts of functional master batch, 6-8 parts of paraffin, 1-3 parts of CPE modifier, 6-15 parts of mica stone powder, 3-8 parts of phenol, 6-9 parts of fine talcum powder and 1-3 parts of thickener. The cable filling material disclosed by the invention has the advantages of good waterproof and moistureproof effects, good flame retardant property and good stability, and can well protect cables.
CN108017822A discloses a filling material for cables, which comprises, by weight, 50-80 parts of L DPE plastic, 30-40 parts of epoxy resin, 5-10 parts of graphite, 1-8 parts of foaming agent, 2-6 parts of flame retardant, 3-8 parts of carbon black, 1-3 parts of stabilizer, 2-5 parts of modified filler, 1-3 parts of plasticizer, 3-15 parts of zinc borate, 1-3 parts of environment-friendly stabilizer, 6-15 parts of water glass, 5-9 parts of silicon resin, 2-4 parts of melamine, 2-6 parts of straw ash and 6-15 parts of mullite powder.
CN110922105A discloses a multifunctional cable filling material and a preparation method thereof. According to the respective solubility properties of the color developing material, the paraffin/expanded graphite composite phase change heat absorbing material, the bentonite, the quartz sand, the agar and the cement, the adding proportion and adding time of the components in the preparation process are optimized, so that the obtained slurry has expected viscosity, and has the characteristic of low thermal resistance after solidification. In addition, all the raw materials and additives adopted by the invention are substances which have low cost, are environment-friendly, and are nontoxic and harmless. The filling material prepared by the invention adopts the paraffin/expanded graphite composite phase change heat absorption material as a phase change heat storage system, the latent heat absorbed or released by the phase change material during phase change is utilized for heat storage, and in the process of heat exchange, the system temperature is approximately stable, and the filling material has the advantages of large heat storage density, approximately isothermal heat storage and release process, easily controlled process, repeated use and the like.
The cable filling material produced by the above patents and the prior art mainly emphasizes the waterproof and moistureproof effects, flame retardant properties and stability of the material, and the heat conduction effect is often poor, but when the high-voltage power cable is in operation, the wire core is lost, heat is generated to establish a heat flow field, and the heat flow field generates temperature drop at each layer, so that the temperature of a cable conductor is far higher than the ambient temperature of the cable. If the cable insulation is operated at high temperatures for a long period of time, the cable will age more rapidly, the insulation life will be greatly reduced, and the transport capacity will also be reduced.
Disclosure of Invention
In order to solve the problems, the invention provides a preparation method of a low-thermal-resistance filling material for a high-voltage cable.
A preparation method of a low-thermal-resistance filling material for a high-voltage cable mainly adopts the following scheme:
adding 50-70 parts of polyisoprene grafted monomethyl maleate, 5-10 parts of ethylene-vinyl acetate copolymer and 20-50 parts of polyisoprene rubber into a mixing roll according to the mass parts, mixing for 10-30min at the temperature of 100 ℃ and 120 ℃,
then adding 12-18 parts of vulcanizing agent, 5-12 parts of vulcanizing assistant and 150-260 parts of modified heat-conducting filler; 1-5 parts of boric acid, 10-50 parts of white carbon black, 3-8 parts of lubricant, 0.5-3 parts of coupling agent and 1-4 parts of anti-aging agent 1-naphthylaminobenzene, and then mixing for 5-20min at the temperature of 120-; after the completion, preparing a filling material blank from the mixed material through an extruder; then vulcanizing the mixture for 10 to 30min at the pressure of 5 to 8MPa and the temperature of 100-120 ℃ to obtain the high-voltage cable low-thermal-resistance filling material.
The low-thermal-resistance filling material for the high-voltage cable uses 1-phenyl-2-butene-1-ketone as a raw material.
The low-thermal-resistance filling material for the high-voltage cable uses mercaptopropyl silane as a raw material.
The low-thermal-resistance filling material for the high-voltage cable uses isocyanate ethyl acrylate as a raw material.
The preparation method of the modified heat-conducting filler comprises the following steps:
according to the mass parts, under the protection of high-purity nitrogen, 5-11 parts of 1-phenyl-2-butene-1-one, 7-12 parts of mercaptopropylsilane and 260-370 parts of n-butyl alcohol are added, the mixture is stirred for 10-30min and then evenly mixed, high-purity nitrogen is introduced for protection, the temperature is controlled to be 70-85 ℃, then 3-6 parts of 12-18% chloroplatinic acid n-butyl alcohol solution is slowly added into a reaction kettle, 1-5 parts of isocyanate ethyl acrylate is added, the temperature is controlled to be 70-80 ℃, the reaction lasts for 10-15h, 55-120 parts of alumina and 10-20 parts of expanded graphite powder are added, the temperature is controlled to be 70-80 ℃, the reaction lasts for 1-3h, and the modified heat-conducting filler can be obtained after filtration and drying.
The modified heat-conducting filler modifier adopts 1-phenyl-2-butene-1-ketone, mercaptopropylsilane and isocyanate ethyl acrylate to perform hydrosilylation, and partial reaction is shown as follows:
the vulcanizing agent is sulfur or N, N-m-phenylene bismaleimide or dicumyl peroxide.
The vulcanizing assistant is triethylene diamine or stannous octoate or vanadium acetylacetonate.
The mixing roll is a double-rotor continuous mixing roll.
The lubricant is stearamide, calcium stearate or magnesium stearate.
The coupling agent is isopropyl tri (dioctyl pyrophosphoryl oxy) titanate or 3- (methacryloyloxy) propyl trimethoxy silane.
The preparation method of the high-voltage cable low-thermal-resistance filling material takes polyisoprene grafted monomethyl maleate as main base resin, takes a modified heat-conducting filler as heat-conducting particles, is formed by combining various different fillers according to a proportion, greatly improves the compatibility with organic resin materials through surface modification, can effectively improve a heat-conducting passage, reduces the interface thermal resistance and improves the thermal conductivity of the interface material; the low-thermal-resistance filling material provided by the invention is simple in use method, wide in application range, capable of being directly applied to various cable grooves and cable calandria, strong in applicability and feasible for comprehensive popularization and use.
Drawings
FIG. 1 is a Fourier infrared spectrum of a modifier for a modified thermally conductive filler prepared in example 3.
At 641cm-1An absorption peak of alumina exists nearby, which indicates that the alumina participates in the reaction; at 1462cm-1The expansion and contraction absorption peak of benzene ring skeleton is present nearby, and is 1719cm-1The absorption peak of the ketone carbonyl group is in the vicinity of 2942cm-1A flexible absorption peak of the hydrocarbon exists nearby, which indicates that the 1-phenyl-2-butene-1-ketone participates in the reaction; at 725cm-1The expansion and contraction absorption peak of silicon carbon exists nearby and is at 2158cm-1The expansion and contraction absorption peak of silicon hydrogen exists nearby, and is 2549cm-1A stretching absorption peak of the hydrogen sulfide exists nearby, which indicates that the mercaptopropyl silane participates in the reaction; at 1372/1085cm-1An absorption peak of extension and contraction of a carbon-nitrogen single bond in the vicinity of 1170cm-1An antisymmetric telescopic absorption peak of ester carbon oxygen exists nearby, and is 2294cm-1An antisymmetric telescopic absorption peak of carbon-nitrogen double bond of isocyanic acid radical exists nearby, which shows that isocyanate ethyl acrylate participates in the reaction; at 1641cm-1No obvious absorption peak of carbon-carbon double bonds exists nearby, which indicates that the double bonds are all involved in the reaction.
Detailed Description
The invention is further illustrated by the following specific examples:
the experiment was carried out to test the thermal resistivity of the material according to GB 10297-1998. The compressive strength of the material in the dry state was tested according to GB 177-85.
Example 1
A preparation method of a low-thermal-resistance filling material for a high-voltage cable mainly adopts the following scheme:
adding 50kg of polyisoprene grafted monomethyl maleate, 5kg of ethylene-vinyl acetate copolymer and 20kg of polyisoprene rubber into a mixing roll, mixing for 10min at 100 ℃,
then 12kg of vulcanizing agent, 5kg of vulcanizing assistant and 150kg of modified heat-conducting filler are added; 1kg of boric acid, 10kg of white carbon black, 3kg of lubricant, 0.5kg of coupling agent and 1kg of anti-aging agent 1-naphthylaminobenzene, and then mixing for 5min at the temperature of 120 ℃; after the completion, preparing a filling material blank from the mixed material through an extruder; and vulcanizing at 100 ℃ for 10min under the pressure of 5MPa to obtain the high-voltage cable low-thermal-resistance filling material.
The preparation method of the modified heat-conducting filler comprises the following steps:
under the protection of high-purity nitrogen, adding 5kg of 1-phenyl-2-butene-1-one, 7kg of mercaptopropylsilane and 260kg of n-butyl alcohol, stirring for 10min, uniformly mixing, introducing high-purity nitrogen for protection, controlling the temperature to be 70 ℃, then slowly adding 3kg of 12% n-butyl alcohol solution of chloroplatinic acid into a reaction kettle, adding 1kg of isocyanate ethyl acrylate, controlling the temperature to be 70 ℃, reacting for 10h, adding 55kg of alumina and 10kg of expanded graphite powder, controlling the temperature to be 70 ℃, stirring for 1h, filtering, and drying to obtain the modified heat-conducting filler.
The vulcanizing agent is sulfur.
The vulcanization auxiliary agent is triethylene diamine.
The mixing roll is a double-rotor continuous mixing roll.
The lubricant is stearamide.
The coupling agent is isopropyl tri (dioctyl pyrophosphato acyloxy) titanate.
The thermal resistance coefficient of the low thermal resistance filling material prepared by the experiment is 23.4 K.cm/W, and the compressive strength is 12.4 MPa.
Example 2
A preparation method of a low-thermal-resistance filling material for a high-voltage cable mainly adopts the following scheme:
then 15kg of vulcanizing agent, 7kg of vulcanizing assistant and 180kg of modified heat-conducting filler are added; 2kg of boric acid, 43kg of white carbon black, 6kg of lubricant, 1kg of coupling agent and 1.6kg of anti-aging agent 1-naphthylaminobenzene, and then mixing for 15min at the temperature of 126 ℃; after the completion, preparing a filling material blank from the mixed material through an extruder; and vulcanizing the mixture for 16min at the temperature of 107 ℃ under the pressure of 7MPa to obtain the high-voltage cable low-thermal-resistance filling material.
The preparation method of the modified heat-conducting filler comprises the following steps:
under the protection of high-purity nitrogen, adding 8kg of 1-phenyl-2-butene-1-one, 9kg of mercaptopropylsilane and 285kg of n-butyl alcohol, stirring for 16min, uniformly mixing, introducing high-purity nitrogen for protection, controlling the temperature to be 78 ℃, then slowly adding 5kg of 15% n-butyl alcohol solution of chloroplatinic acid into a reaction kettle, adding 2kg of isocyanate ethyl acrylate, controlling the temperature to be 75 ℃, reacting for 12h, adding 120kg of alumina and 15kg of expanded graphite powder, controlling the temperature to be 74 ℃, stirring for 1.5h, filtering, and drying to obtain the modified heat-conducting filler.
The vulcanizing agent is N, N-m-phenylene bismaleimide.
The vulcanizing aid is stannous octoate.
The mixing roll is a double-rotor continuous mixing roll.
The lubricant is calcium stearate.
The coupling agent is 3- (methacryloyloxy) propyl trimethoxy silane.
The thermal resistance coefficient of the low thermal resistance filling material prepared by the experiment is 21.8 K.cm/W, and the compressive strength is 13.2 MPa.
Example 3
A preparation method of a low-thermal-resistance filling material for a high-voltage cable mainly adopts the following scheme:
then adding 18kg of vulcanizing agent, 12kg of vulcanizing assistant and 260kg of modified heat-conducting filler; 5kg of boric acid, 50kg of white carbon black, 8kg of lubricant, 3kg of coupling agent and 4kg of anti-aging agent 1-naphthylaminobenzene, and then mixing for 20min at the temperature of 140 ℃; after the completion, preparing a filling material blank from the mixed material through an extruder; and vulcanizing the mixture at 120 ℃ for 30min under the pressure of 8MPa to obtain the high-voltage cable low-thermal-resistance filling material.
The preparation method of the modified heat-conducting filler comprises the following steps:
under the protection of high-purity nitrogen, adding 11kg of 1-phenyl-2-butene-1-one, 12kg of mercaptopropylsilane and 370kg of n-butyl alcohol, stirring for 30min, uniformly mixing, introducing high-purity nitrogen for protection, controlling the temperature to be 85 ℃, then slowly adding 6kg of 18% chloroplatinic acid n-butyl alcohol solution into a reaction kettle, adding 5kg of isocyanate ethyl acrylate, controlling the temperature to be 80 ℃, reacting for 15h, adding 120kg of alumina and 20kg of expanded graphite powder, controlling the temperature to be 80 ℃, stirring for 3h, filtering, and drying to obtain the modified heat-conducting filler.
The vulcanizing agent is dicumyl peroxide.
The vulcanizing assistant is vanadium acetylacetonate.
The mixing roll is a double-rotor continuous mixing roll.
The lubricant is magnesium stearate.
The coupling agent is 3- (methacryloyloxy) propyl trimethoxy silane.
The thermal resistance coefficient of the low thermal resistance filling material prepared by the experiment is 21.2 K.cm/W, and the compressive strength is 13.5 MPa.
Comparative example 1
A preparation method of a low-thermal-resistance filling material for a high-voltage cable mainly adopts the following scheme:
adding 50kg of polyisoprene grafted monomethyl maleate, 5kg of ethylene-vinyl acetate copolymer and 20kg of polyisoprene rubber into a mixing roll, mixing for 10min at 100 ℃,
then 12kg of vulcanizing agent, 5kg of vulcanizing assistant and 150kg of modified heat-conducting filler are added; 1kg of boric acid, 10kg of white carbon black, 3kg of lubricant, 0.5kg of coupling agent and 1kg of anti-aging agent 1-naphthylaminobenzene, and then mixing for 5min at the temperature of 120 ℃; after the completion, preparing a filling material blank from the mixed material through an extruder; and vulcanizing at 100 ℃ for 10min under the pressure of 5MPa to obtain the high-voltage cable low-thermal-resistance filling material.
The preparation method of the modified heat-conducting filler comprises the following steps:
under the protection of high-purity nitrogen, adding 7kg of mercaptopropyl silane and 260kg of n-butyl alcohol, stirring for 10min, uniformly mixing, introducing high-purity nitrogen for protection, controlling the temperature to be 70 ℃, then slowly adding 3kg of 12% n-butyl alcohol solution of chloroplatinic acid into a reaction kettle, adding 1kg of isocyanate ethyl acrylate, controlling the temperature to be 70 ℃, reacting for 10h, adding 55kg of alumina and 10kg of expanded graphite powder, controlling the temperature to be 70 ℃, stirring for 1h, filtering, and drying to obtain the modified heat-conducting filler.
The vulcanizing agent is sulfur.
The vulcanization auxiliary agent is triethylene diamine.
The mixing roll is a double-rotor continuous mixing roll.
The lubricant is stearamide.
The coupling agent is isopropyl tri (dioctyl pyrophosphato acyloxy) titanate.
The thermal resistance coefficient of the low thermal resistance filling material prepared by the experiment is 35.7 K.cm/W, and the compressive strength is 11.8 MPa.
Comparative example 2
A preparation method of a low-thermal-resistance filling material for a high-voltage cable mainly adopts the following scheme:
adding 50kg of polyisoprene grafted monomethyl maleate, 5kg of ethylene-vinyl acetate copolymer and 20kg of polyisoprene rubber into a mixing roll, mixing for 10min at 100 ℃,
then 12kg of vulcanizing agent, 5kg of vulcanizing assistant and 150kg of modified heat-conducting filler are added; 1kg of boric acid, 10kg of white carbon black, 3kg of lubricant, 0.5kg of coupling agent and 1kg of anti-aging agent 1-naphthylaminobenzene, and then mixing for 5min at the temperature of 120 ℃; after the completion, preparing a filling material blank from the mixed material through an extruder; and vulcanizing at 100 ℃ for 10min under the pressure of 5MPa to obtain the high-voltage cable low-thermal-resistance filling material.
The heat conducting filler is 120kg of alumina and 20kg of expanded graphite powder which are uniformly mixed.
The vulcanizing agent is sulfur.
The vulcanization auxiliary agent is triethylene diamine.
The mixing roll is a double-rotor continuous mixing roll.
The lubricant is stearamide.
The coupling agent is isopropyl tri (dioctyl pyrophosphato acyloxy) titanate.
The thermal resistance coefficient of the low thermal resistance filling material prepared by the experiment is 50.7 K.cm/W, and the compressive strength is 7.1 MPa.
Comparative example 3
A preparation method of a low-thermal-resistance filling material for a high-voltage cable mainly adopts the following scheme:
a preparation method of a low-thermal-resistance filling material for a high-voltage cable mainly adopts the following scheme:
adding 50kg of polyisoprene grafted monomethyl maleate, 5kg of ethylene-vinyl acetate copolymer and 20kg of polyisoprene rubber into a mixing roll, mixing for 10min at 100 ℃,
then 12kg of vulcanizing agent, 5kg of vulcanizing assistant and 150kg of modified heat-conducting filler are added; 1kg of boric acid, 10kg of white carbon black, 3kg of lubricant, 0.5kg of coupling agent and 1kg of anti-aging agent 1-naphthylaminobenzene, and then mixing for 5min at the temperature of 120 ℃; after the completion, preparing a filling material blank from the mixed material through an extruder; and vulcanizing at 100 ℃ for 10min under the pressure of 5MPa to obtain the high-voltage cable low-thermal-resistance filling material.
The preparation method of the modified heat-conducting filler comprises the following steps:
under the protection of high-purity nitrogen, adding 5kg of 1-phenyl-2-butene-1-one, 7kg of mercaptopropylsilane and 260kg of n-butyl alcohol, stirring for 10min, uniformly mixing, introducing high-purity nitrogen for protection, controlling the temperature to be 70 ℃, then slowly adding 3kg of 12% chloroplatinic acid n-butyl alcohol solution into a reaction kettle, controlling the temperature to be 70 ℃, reacting for 10h, adding 55kg of alumina and 10kg of expanded graphite powder, controlling the temperature to be 70 ℃, stirring for 1h, filtering and drying to obtain the modified heat-conducting filler.
The vulcanizing agent is sulfur.
The vulcanization auxiliary agent is triethylene diamine.
The mixing roll is a double-rotor continuous mixing roll.
The lubricant is stearamide.
The coupling agent is isopropyl tri (dioctyl pyrophosphato acyloxy) titanate.
The thermal resistance coefficient of the low thermal resistance filling material prepared by the experiment is 34.7 K.cm/W, and the compressive strength is 10.7 MPa.
Comparative example 4
A preparation method of a low-thermal-resistance filling material for a high-voltage cable mainly adopts the following scheme:
adding 50kg of polyisoprene grafted monomethyl maleate, 5kg of ethylene-vinyl acetate copolymer and 20kg of polyisoprene rubber into a mixing roll, mixing for 10min at 100 ℃,
then 12kg of vulcanizing agent, 5kg of vulcanizing assistant and 150kg of modified heat-conducting filler are added; 1kg of boric acid, 10kg of white carbon black, 3kg of lubricant, 0.5kg of coupling agent and 1kg of anti-aging agent 1-naphthylaminobenzene, and then mixing for 5min at the temperature of 120 ℃; after the completion, preparing a filling material blank from the mixed material through an extruder; and vulcanizing at 100 ℃ for 10min under the pressure of 5MPa to obtain the high-voltage cable low-thermal-resistance filling material.
The preparation method of the modified heat-conducting filler comprises the following steps:
under the protection of high-purity nitrogen, adding 5kg of 1-phenyl-2-butene-1-one and 260kg of n-butyl alcohol, stirring for 10min, uniformly mixing, introducing high-purity nitrogen for protection, controlling the temperature to be 70 ℃, then slowly adding 3kg of 12% n-butyl alcohol solution of chloroplatinic acid into a reaction kettle, adding 1kg of isocyanate ethyl acrylate, controlling the temperature to be 70 ℃, reacting for 10h, adding 55kg of alumina and 10kg of expanded graphite powder, controlling the temperature to be 70 ℃, stirring for 1h, filtering, and drying to obtain the modified heat-conducting filler.
The vulcanizing agent is sulfur.
The vulcanization auxiliary agent is triethylene diamine.
The mixing roll is a double-rotor continuous mixing roll.
The lubricant is stearamide.
The coupling agent is isopropyl tri (dioctyl pyrophosphato acyloxy) titanate.
The thermal resistance coefficient of the low thermal resistance filling material prepared by the experiment is 43.2 K.cm/W, and the compressive strength is 9.3 MPa.
Claims (7)
1. A preparation method of a low-thermal-resistance filling material for a high-voltage cable mainly adopts the following scheme:
adding 50-70 parts of polyisoprene grafted monomethyl maleate, 5-10 parts of ethylene-vinyl acetate copolymer and 20-50 parts of polyisoprene rubber into a mixing roll according to the mass parts, mixing for 10-30min at the temperature of 100 ℃ and 120 ℃,
then adding 12-18 parts of vulcanizing agent, 5-12 parts of vulcanizing assistant and 150-260 parts of modified heat-conducting filler; 1-5 parts of boric acid, 10-50 parts of white carbon black, 3-8 parts of lubricant, 0.5-3 parts of coupling agent and 1-4 parts of anti-aging agent 1-naphthylaminobenzene, and then mixing for 5-20min at the temperature of 120-; after the completion, preparing a filling material blank from the mixed material through an extruder; then vulcanizing the mixture for 10 to 30min at the pressure of 5 to 8MPa and the temperature of 100-120 ℃ to obtain the high-voltage cable low-thermal-resistance filling material.
2. The preparation method of the high-voltage cable low-thermal-resistance filling material according to claim 1, characterized in that: the preparation method of the modified heat-conducting filler comprises the following steps:
according to the mass parts, under the protection of high-purity nitrogen, 5-11 parts of 1-phenyl-2-butene-1-one, 7-12 parts of mercaptopropylsilane and 260-370 parts of n-butyl alcohol are added, the mixture is stirred for 10-30min and then evenly mixed, high-purity nitrogen is introduced for protection, the temperature is controlled to be 70-85 ℃, then 3-6 parts of 12-18% chloroplatinic acid n-butyl alcohol solution is slowly added into a reaction kettle, 1-5 parts of isocyanate ethyl acrylate is added, the temperature is controlled to be 70-80 ℃, the reaction lasts for 10-15h, 55-120 parts of alumina and 10-20 parts of expanded graphite powder are added, the temperature is controlled to be 70-80 ℃, the reaction lasts for 1-3h, and the modified heat-conducting filler can be obtained after filtration and drying.
3. The preparation method of the high-voltage cable low-thermal-resistance filling material according to claim 1, characterized in that: the vulcanizing agent is sulfur or N, N-m-phenylene bismaleimide or dicumyl peroxide.
4. The preparation method of the high-voltage cable low-thermal-resistance filling material according to claim 1, characterized in that: the vulcanizing assistant is triethylene diamine or stannous octoate or vanadium acetylacetonate.
5. The preparation method of the high-voltage cable low-thermal-resistance filling material according to claim 1, characterized in that: the mixing roll is a double-rotor continuous mixing roll.
6. The preparation method of the high-voltage cable low-thermal-resistance filling material according to claim 1, characterized in that: the lubricant is stearamide, calcium stearate or magnesium stearate.
7. The preparation method of the high-voltage cable low-thermal-resistance filling material according to claim 1, characterized in that: the coupling agent is isopropyl tri (dioctyl pyrophosphoryl oxy) titanate or 3- (methacryloyloxy) propyl trimethoxy silane.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023014628A1 (en) * | 2021-08-04 | 2023-02-09 | Dow Global Technologies Llc | Polyolefin formulation containing crotophenone compound |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023014628A1 (en) * | 2021-08-04 | 2023-02-09 | Dow Global Technologies Llc | Polyolefin formulation containing crotophenone compound |
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