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CN-122011602-A - 150KV ultra-high voltage ethylene propylene rubber cable material and preparation method and application thereof

CN122011602ACN 122011602 ACN122011602 ACN 122011602ACN-122011602-A

Abstract

The invention discloses a 150kV ultrahigh-voltage ethylene propylene rubber cable material, and a preparation method and application thereof, and belongs to the technical field of cable insulation materials. The 150kV ultra-high voltage ethylene propylene rubber cable material is obtained by selecting the specific ethylene propylene rubber and cooperatively matching with other components, has good electrical performance and high voltage resistance, and meanwhile, the rigidity, toughness, oil resistance, acid and alkali resistance, weather resistance, mechanical property and wear resistance of the 150kV ultra-high voltage ethylene propylene rubber cable material can be obviously improved by adding the methyl methacrylate-butadiene-styrene copolymer, the chlorotrifluoroethylene-ethylene copolymer and the acrylic ester copolymer into the 150kV ultra-high voltage ethylene propylene rubber cable material, and the active group and other group effects on the surface of modified kaolin further improve the mechanical performance of the 150kV ultra-high voltage ethylene propylene rubber cable material, so that the ethylene propylene rubber cable material has good application prospect.

Inventors

  • YAO ZHANGQING
  • ZHOU QIUXIANG

Assignees

  • 湖北联上科技有限公司

Dates

Publication Date
20260512
Application Date
20260228

Claims (10)

  1. 1. The 150kV ultra-high voltage ethylene propylene rubber cable material is characterized by comprising, by weight, 80-120 parts of ethylene propylene rubber, 30-40 parts of modified kaolin, 5-15 parts of methyl methacrylate-butadiene-styrene copolymer, 4-16 parts of trifluorochloroethylene-ethylene copolymer, 3-10 parts of acrylic ester copolymer, 3-12 parts of zinc oxide, 2-15 parts of anti-aging agent, 2-10 parts of Fischer-Tropsch wax, 0.5-5 parts of silane coupling agent, 0.1-0.3 part of anti-copper agent, 0.5-5 parts of cross-linking agent and 0.5-2 parts of cross-linking auxiliary agent; Wherein the ethylene content in the ethylene propylene rubber is 70-78%, and the third monomer content is 0.5-2.5%.
  2. 2. The 150kV ultra-high voltage ethylene propylene rubber cable material according to claim 1, wherein the preparation of the modified kaolin comprises the steps of sequentially carrying out acid treatment and low-temperature plasma treatment on kaolin to obtain the modified kaolin; The acid treatment step specifically comprises the steps of adding the kaolin into acid liquor for soaking to obtain the kaolin after acid treatment, wherein the mass ratio of the kaolin to the acid liquor is 1 (6-8), the mass concentration of the acid liquor is 8-12%, the acid liquor comprises at least one of sulfuric acid solution, nitric acid solution and hydrochloric acid solution, and the soaking time is 6-10h.
  3. 3. The 150kV ultra-high voltage ethylene propylene rubber cable material according to claim 2, wherein in the step of sequentially carrying out acid treatment and low-temperature plasma treatment on kaolin, the low-temperature plasma treatment specifically comprises the steps of placing the kaolin subjected to the acid treatment in low-temperature plasma equipment, introducing gas, setting glow discharge power, vacuumizing, and treating for 3-5min to obtain the modified kaolin.
  4. 4. A 150kV ultra-high voltage ethylene propylene rubber cable material according to claim 3, wherein the gas comprises at least one of oxygen, carbon dioxide, hydrogen and methane, and the flow rate of the gas is 1-2L/min, and the power of the glow discharge is 100-150W.
  5. 5. The 150kV ultra-high voltage ethylene propylene rubber cable material according to claim 1, wherein the anti-aging agent comprises ethoxyquinoline, and the silane coupling agent comprises at least one of vinyltriethoxysilane and vinyltrimethoxysilane.
  6. 6. The 150kV ultra-high voltage ethylene propylene rubber cable material according to claim 1, wherein the anti-copper agent comprises a zinc salt of 2-mercaptobenzimidazole.
  7. 7. The 150kV ultra-high voltage ethylene propylene rubber cable material according to claim 1, wherein the crosslinking agent comprises dicumyl peroxide and the crosslinking auxiliary agent comprises triallyl cyanurate.
  8. 8. A method for preparing a 150kV ultra-high voltage ethylene propylene rubber cable material according to any one of claims 1-7, comprising the steps of: S1, providing a dust-free purified production workshop; S2, mixing ethylene propylene rubber, methyl methacrylate-butadiene-styrene copolymer, trifluoro vinyl chloride-ethylene copolymer, acrylic ester copolymer, modified kaolin, zinc oxide, an anti-aging agent, fischer-Tropsch wax and an anti-copper agent in the production workshop, performing first mixing, adding a silane coupling agent, performing second mixing, continuously adding a cross-linking agent and a cross-linking auxiliary agent, performing third mixing to obtain a mixture, and extruding and granulating the mixture in a double-screw extruder to obtain the 150kV ultrahigh-voltage ethylene propylene rubber cable material.
  9. 9. The method according to claim 8, wherein in step S1, the clean-free production plant has a cleanliness class of ISO 3-5 and/or, In the step S2, the temperature of the first mixing is 125-155 ℃ for 1-2min, the temperature of the second mixing is 125-155 ℃ for 3-4min, the temperature of the third mixing is 90-100 ℃ for 1-2.5min, and the temperature of the extrusion granulation is 80-100 ℃.
  10. 10. Use of the 150kV ultra-high voltage ethylene propylene rubber cable material according to any one of claims 1-7 or the 150kV ultra-high voltage ethylene propylene rubber cable material prepared by the preparation method according to any one of claims 8-9 in offshore wind power and/or pumped storage power stations.

Description

150KV ultra-high voltage ethylene propylene rubber cable material and preparation method and application thereof Technical Field The invention belongs to the technical field of cable insulating materials, and particularly relates to a 150kV ultrahigh-voltage ethylene propylene rubber cable material and a preparation method and application thereof. Background Ethylene Propylene Rubber (EPR) is known to have excellent electrical properties, a small dielectric constant and a small dielectric loss tangent, and to have excellent water resistance, corona resistance, mechanical properties, aging resistance and the like, and has become one of the main insulating materials for high-voltage cables. With the rapid development of Chinese 'double carbon' targets and new energy sources such as offshore wind power, pumped storage power stations and the like, the demand on a high-voltage and ultra-high-voltage (35 kV, 66kV, 110kV and even 150 kV) ethylene propylene rubber insulated power cable current collection system is multiplied, the whole industry gradually shifts to deep-open sea development, because the high-voltage transmission can effectively improve the output efficiency, reduce the current, greatly reduce the line loss and reduce the power loss of a power transmission cable, and because the high-voltage ethylene propylene rubber insulating material is basically from foreign import, the technical difficulty of the formula is high, and water trees are easy to be produced relative to crosslinked polyethylene, manufacturers for developing the product in China hardly see related standards and documents. Besides the main material EPR, other raw materials such as filling reinforcing agents and the like are also required to be matched in the ethylene propylene rubber cable material, and the common filling reinforcing agents include white carbon black, calcium carbonate, kaolin, talcum powder and the like. The surface of the carbon black particles contains carbonyl, hydroxyl, quinone groups and other groups, and the groups can perform mutual bonding action with molecular chains in rubber molecules to form combined rubber, so that the mechanical strength and wear resistance of the rubber material can be obviously improved. Functional additives, plasticizers and the like can be added to further improve the performance of the material. However, no research report on 150kV ultra-high voltage ethylene propylene rubber cable materials is available at present. Disclosure of Invention The invention aims to provide a 150kV ultrahigh-voltage ethylene propylene rubber cable material, and a preparation method and application thereof. The method is used for solving the problem that 150kV ultrahigh-voltage ethylene propylene rubber cable materials are lacked in the prior art. In the first aspect, the invention provides a 150kV ultra-high voltage ethylene propylene rubber cable material, which comprises, by weight, 80-120 parts of ethylene propylene rubber, 30-40 parts of modified kaolin, 5-15 parts of methyl methacrylate-butadiene-styrene copolymer, 4-16 parts of trifluorochloroethylene-ethylene copolymer, 3-10 parts of acrylic ester copolymer, 3-12 parts of zinc oxide, 2-15 parts of anti-aging agent, 2-10 parts of Fischer-Tropsch wax, 0.5-5 parts of silane coupling agent, 0.1-0.3 part of copper inhibitor, 0.5-5 parts of cross-linking agent and 0.5-2 parts of cross-linking auxiliary agent, wherein the ethylene content in the ethylene propylene rubber is 70-78%, and the third monomer content is 0.5-2.5%. According to the invention, the inventor researches and discovers that the 150kV ultra-high voltage ethylene propylene rubber cable material is obtained by selecting the specific ethylene propylene rubber and cooperatively matching with other components, the cable material has good electrical performance and high voltage resistance, meanwhile, after the methyl methacrylate-butadiene-styrene copolymer, the chlorotrifluoroethylene-ethylene copolymer and the acrylic ester copolymer are added into the 150kV ultra-high voltage ethylene propylene rubber cable material, the performance of the 150kV ultra-high voltage ethylene propylene rubber cable material can be obviously improved through the synergistic effect of the three, wherein the methyl methacrylate-butadiene-styrene copolymer has good rigidity and toughness, oil resistance, acid and alkali resistance, the chlorotrifluoroethylene-ethylene copolymer has good strength and corrosion resistance, the acrylic ester copolymer is used as a compatilizer, the methyl methacrylate-butadiene-styrene copolymer and the chlorotrifluoroethylene-ethylene copolymer can be crosslinked, and further the weather resistance and mechanical performance of the 150kV ultra-high voltage ethylene propylene rubber cable material are improved, in addition, after the modified kaolin and the silane coupling agent act, the wear resistance of the 150kV ultra-high voltage ethylene propylene rubber cable material can be