Semi-conductive rubber, and preparation method and application thereof

A semi-conductive and rubber technology, which is applied in the field of semi-conductive rubber and its preparation, can solve the problems of reduced mechanical properties and electrical properties of the rubber compound, and the inability to meet the use conditions of the rubber compound.

Active Publication Date: 2021-09-10
长沙长缆电工绝缘材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the amount of carbon black is reduced, the mechanical properties and electrical properties of the rubber will be greatly reduced, which cannot meet the conditions of use of the rubber in the high-voltage field.

Method used

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  • Semi-conductive rubber, and preparation method and application thereof
  • Semi-conductive rubber, and preparation method and application thereof
  • Semi-conductive rubber, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] In this example, a semi-conductive rubber is prepared, and the specific preparation raw materials include:

[0075] EPDM rubber with grade 4520 of Dow Chemical: 100 parts;

[0076] Zinc oxide: 4 parts;

[0077] Antiaging agent RD: 1 part;

[0078] Composite plasticizer: paraffin oil: 12 parts, dioctyl sebacate: 8 parts;

[0079] Superconducting carbon black: 28 parts;

[0080] Vulcanizing agent: dicumyl peroxide: 6 parts;

[0081] Composite auxiliary crosslinking agent: triallyl isocyanurate: 1.5 parts, sulfur: 0.5 parts.

[0082] Wherein, the superconducting carbon black is Czech AC-80 superconducting carbon black. In this embodiment, the added amount of superconducting carbon black is 17.4%.

[0083] The performance parameters of superconducting carbon black and ordinary carbon black are shown in Table 1.

[0084] Table 1

[0085]

[0086] The preparation method of the above-mentioned low-hardness, high-strength and high-electricity EPDM insulating rubber c...

Embodiment 2

[0093] This example adopts the same preparation method as in Example 1 to prepare a semiconductive rubber, and the specific preparation raw materials include:

[0094] EPDM rubber with grade 4520 of Dow Chemical: 100 parts;

[0095] Zinc oxide: 4 parts;

[0096] Antiaging agent RD: 1 part;

[0097] Composite plasticizer: white naphthenic oil: 12 parts, polyisobutylene: 8 parts;

[0098] Carbon black: 30 parts;

[0099] Vulcanizing agent: dicumyl peroxide: 6 parts;

[0100] Composite auxiliary crosslinking agent: triallyl isocyanurate: 1.5 parts, sulfur: 0.5 parts.

[0101] Wherein, the superconducting carbon black is Czech AC-80 superconducting carbon black. In this embodiment, the added amount of superconducting carbon black is 18.4%.

Embodiment 3

[0103] This example adopts the same preparation method as in Example 1 to prepare a semiconductive rubber, and the specific preparation raw materials include:

[0104] EPDM rubber with grade 4520 of Dow Chemical: 100 parts;

[0105] Zinc oxide: 4 parts;

[0106] Antiaging agent RD: 1 part;

[0107] Composite plasticizer: paraffin oil: 12 parts, dioctyl sebacate: 8 parts;

[0108] Superconducting carbon black: 28 parts;

[0109] Vulcanizing agent: di-tert-butyl peroxide: 7 parts;

[0110] Composite auxiliary crosslinking agent: triallyl isocyanurate: 2 parts, tetramethylthiuram disulfide: 2 parts.

[0111] Wherein, the superconducting carbon black is Czech AC-80 superconducting carbon black. In this embodiment, the superconducting carbon black is added in an amount of 17.1%.

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Abstract

The invention provides semi-conductive rubber, and a preparation method and application thereof. According to the semiconductive rubber, the volume resistivity is smaller than or equal to 500 omega.cm, the Shore A hardness is smaller than or equal to 75, and the preparation raw materials of the semiconductive rubber contain superconductive carbon black. In order to obtain a low-hardness technical index, in formula design, the use amount of a reinforcing agent is generally reduced, such as the use amount of carbon black is reduced. However, due to the reduction of the consumption of the carbon black, the mechanical property and the aging property of the rubber can be reduced, and meanwhile, the volume resistivity of the rubber can be increased, so that the semi-conductive performance requirement cannot be met. In order to solve the problem, superconductive carbon black with large specific surface area and superconductivity is used in the invention. The superconductive carbon black is large in specific surface area, good in reinforcing effect and excellent in conductivity, so that the mechanical property and the electrical property of the rubber can meet the requirements even if the addition amount is small.

Description

technical field [0001] The invention belongs to the technical field of cable accessories, and in particular relates to a semiconductive rubber and its preparation method and application. Background technique [0002] Power cable accessories are products that connect cables with power transmission and distribution lines and related power distribution devices. Generally, they refer to the intermediate connection and terminal connection of various cables in the cable line. Together with the cables, they form a power transmission network. Cable accessories are mainly based on the characteristics of the cable structure, which can not only restore the performance of the cable, but also ensure the extension of the cable length and the connection of the terminal. The reliability of high-voltage cable accessories can be judged from the aspects of electrical performance, sealing and moisture-proof performance, mechanical performance and process performance. Commonly used cable access...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L91/06C08L23/20C08K3/22C08K3/04
CPCC08L23/16C08K2201/001C08K2003/2296C08L91/06C08K3/22C08K3/04C08L23/22Y02A30/14
Inventor 贺志文乐新波
Owner 长沙长缆电工绝缘材料有限公司
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