Ultrahigh-voltage flame-retardant cable material and preparation method thereof

A flame-retardant cable material and ultra-high voltage technology, applied in the field of power cables, can solve the problems of fire scale expansion and poor flame resistance, and achieve the effects of improving flame retardancy and mechanical properties, good weather resistance, and improving weather resistance

Inactive Publication Date: 2020-03-24
庄明磊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the EHV cable material used in a large amount is a polyolefin material added with a flame retardant. This type of material is light in weight and halogen-free, excellent in electrical insulation performance and chemical corrosion resistance, low in price, and easy to form and process. However,

Method used

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  • Ultrahigh-voltage flame-retardant cable material and preparation method thereof

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Effect test

Embodiment 1

[0030] A method for preparing an ultra-high voltage flame-retardant cable material, comprising the steps of:

[0031] Step S1, polycondensation of 3,3'-(2,4-diamino-6,7-pteridinediyl)diphenol and carboxyl-terminated polyurethane: 3,3'-(2,4-diamino-6,7 -pteridinediyl)diphenol 1kg, carboxyl-terminated polyurethane 1kg, N,N-diisopropylethylamine 0.6kg, 4-dimethylaminopyridine 0.3kg are dissolved in dimethyl sulfoxide 8kg to form a solution, and then the solution Put it into the reaction kettle, replace the air in the kettle with nitrogen, then react at 130°C under normal pressure for 3 hours, then add 0.5kg of thiophosphonate into the reaction system, then raise the temperature to 240°C, and carry out polycondensation reaction at 300Pa for 15 hour, then cooled to room temperature, adjusted to normal pressure, precipitated in water, washed the precipitated polymer with ethanol for 3 times, and finally placed in a vacuum drying oven at 80°C to dry to constant weight to obtain a pol...

Embodiment 2

[0037] A method for preparing an ultra-high voltage flame-retardant cable material, comprising the steps of:

[0038] Step S1, polycondensation of 3,3'-(2,4-diamino-6,7-pteridinediyl)diphenol and carboxyl-terminated polyurethane: 3,3'-(2,4-diamino-6,7 -pteridinediyl)diphenol 1kg, carboxyl-terminated polyurethane 1kg, N,N-diisopropylethylamine 0.6kg, 4-dimethylaminopyridine 0.3kg dissolved in N,N-dimethylformamide 9kg to form Solution, then add the solution into the reaction kettle, replace the air in the kettle with helium, then react at 135°C under normal pressure for 3.5 hours, then add 0.5kg of thiophosphoramide to the reaction system, and then raise the temperature to 250°C, at 350Pa The polycondensation reaction was carried out at room temperature for 17 hours, then cooled to room temperature, adjusted to normal pressure, and precipitated in water. After the precipitated polymer was washed with ethanol for 4 times, it was finally placed in a vacuum drying oven at 83°C and...

Embodiment 3

[0044] A method for preparing an ultra-high voltage flame-retardant cable material, comprising the steps of:

[0045] Step S1, polycondensation of 3,3'-(2,4-diamino-6,7-pteridinediyl)diphenol and carboxyl-terminated polyurethane: 3,3'-(2,4-diamino-6,7 -pteridinediyl)diphenol 1kg, carboxyl-terminated polyurethane 1kg, N,N-diisopropylethylamine 0.6kg, 4-dimethylaminopyridine 0.3kg are dissolved in N-methylpyrrolidone 10kg to form a solution, and then Put the solution into the reaction kettle, replace the air in the kettle with neon, then react at 140°C under normal pressure for 4 hours, then add 0.5kg of phosphorous acid into the reaction system, then raise the temperature to 255°C, and carry out polycondensation reaction at 400Pa for 17.5 hours , then cooled to room temperature, adjusted to normal pressure, precipitated in water, washed the precipitated polymer with ethanol for 5 times, and finally placed in a vacuum drying oven at 85°C to dry to constant weight to obtain a pol...

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Abstract

The invention discloses a preparation method of an ultrahigh-voltage flame-retardant cable material. The preparation method comprises the following steps: S1, polycondensation of 3,3'-(2,4-diamino-6,7-pteridinediyl)bisphenol and carboxyl-terminated polyurethane; S2, preparation of an intermediate; S3, modification of a polyurethane-based polycondensate; and S4, forming of the cable material. The invention also discloses the ultrahigh-voltage flame-retardant cable material prepared by the preparation method. The ultrahigh-voltage flame-retardant cable material disclosed by the invention is excellent in comprehensive performance, good in flame retardance and insulativity, good in performance stability, long in service life, and safe and environment-friendly in production and use processes.

Description

technical field [0001] The invention relates to the technical field of power cables, in particular to an ultra-high voltage flame-retardant cable material and a preparation method thereof. Background technique [0002] In recent years, with the advancement of science and technology and the development of society, my country's electric power industry has developed rapidly, the operating voltage level of the power grid system has been continuously improved, and the network scale has gradually expanded. The ultra-high or ultra-high voltage transmission network is the skeleton and core of the smart grid that State Grid is building. The construction of an ultra-high voltage transmission network can greatly improve the transmission capacity of my country's power grid and reduce the loss of long-distance power transmission. However, higher voltage levels and DC transmission poses a major challenge to the safety and reliability of cable materials widely used in electrical equipment. ...

Claims

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Application Information

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IPC IPC(8): C08L77/12C08L77/00C08K3/36C08K5/544C08G69/44C08G69/48H01B3/30
CPCC08G69/44C08G69/48C08K2201/011C08L77/12C08L2201/02C08L2201/08C08L2203/202C08L2205/02H01B3/305C08L77/00C08K3/36C08K5/544
Inventor 庄明磊
Owner 庄明磊
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