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A kind of semi-conductive rubber and its preparation method and application

A semi-conductive and rubber technology, which is applied in the field of semi-conductive rubber and its preparation, can solve the problems such as the reduction of the mechanical properties and electrical properties of the rubber material, and the inability to meet the use conditions of the rubber material, etc., and achieve the effect of excellent anti-aging performance

Active Publication Date: 2022-06-07
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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  • A kind of semi-conductive rubber and its preparation method and application
  • A kind of semi-conductive rubber and its preparation method and application
  • A kind of semi-conductive rubber and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

[0076] Zinc oxide: 4 parts;

[0077] Anti-aging 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 part, sulfur: 0.5 part.

[0082] Among them, the superconducting carbon black is the Czech AC-80 superconducting carbon black. In this example, 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 above-mentioned preparation method of EPDM insulating rubber with low hardness, high strength and high electrical per...

Embodiment 2

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

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

[0095] Zinc oxide: 4 parts;

[0096] Anti-aging 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 part, sulfur: 0.5 part.

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

Embodiment 3

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

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

[0105] Zinc oxide: 4 parts;

[0106] Anti-aging agent RD: 1 part;

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

[0108] Superconducting carbon black: 28 parts;

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

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

[0111] Among them, the superconducting carbon black is the Czech AC-80 superconducting carbon black. In this example, the added amount of superconducting carbon black is 17.1%.

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Abstract

The invention provides a semiconductive rubber, a preparation method and application thereof. The semiconductive rubber of the present invention has a volume resistivity of ≤500Ω·cm and a Shore A hardness of ≤75, and the raw material for the semiconductive rubber contains superconductive carbon black. In order to obtain low hardness technical indicators, in formula design, the amount of reinforcing agent is usually reduced, such as reducing the amount of carbon black. However, the reduction of the amount of carbon black will not only reduce the mechanical properties and aging properties of the rubber, but also increase the volume resistivity of the rubber, thus failing to meet the performance requirements of semi-conductivity. To solve this problem, the present invention uses superconducting carbon black with large specific surface area and superconducting properties. Due to its large specific surface area, superconducting carbon black has good reinforcing effect and excellent electrical conductivity. Even if it is added in a small amount, it can make the mechanical and electrical properties of rubber meet the requirements.

Description

technical field [0001] The invention belongs to the technical field of cable accessories, and particularly relates to a semi-conductive rubber and a preparation method and application thereof. Background technique [0002] Power cable accessories are products that connect cables with power transmission and distribution lines and related power distribution devices. They generally refer to the intermediate connections and terminal connections of various cables in cable lines, which together with cables 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 Patents(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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