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Fire-resistant silicon rubber and preparation method thereof and cable

A technology of silicone rubber and silicone rubber insulating layer, which is applied in the direction of insulating cables, rubber insulators, cables, etc., can solve the problems of high cost, poor physical and mechanical properties, and poor bending performance of cables, and achieve huge economic and social benefits. Loss of life and property, effects of fire resistance stabilization

Active Publication Date: 2010-07-21
浙江元通线缆制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the mineral insulated cable has a high service temperature and maintains a long-term power supply ability after a fire, it has the following disadvantages: 1) The manufacturing length is limited and the processing technology is relatively complicated; 2) The cable joint is difficult; 3 ) The cost is expensive; 4) The cable has poor bending performance and high construction requirements, so it is subject to many restrictions in practical applications
However, the mechanical properties of silicone rubber such as tensile strength and tear resistance are poor, and its physical and mechanical properties are not as good as most synthetic rubbers at room temperature. poor

Method used

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  • Fire-resistant silicon rubber and preparation method thereof and cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Prepare refractory silicone rubber raw materials according to formula 1 in Table 1.

[0057] The preparation method of refractory silicone rubber is as follows:

[0058] (1) Mix 500 kg of methyl vinyl silicone rubber on an internal mixer for 5 minutes, then add 5 kg of hydrogen-containing silicone oil and 20 kg of hydroxyl silicone oil, and mix evenly;

[0059] (2) Add fumed white carbon black 100kg and silicon micropowder 100kg in the mixed rubber obtained in (1), mix for 30 minutes, and make high-tear high-strength silicone rubber mixed rubber;

[0060] (3) Add nano-montmorillonite 150kg and silicon carbide 100kg in the mixed rubber obtained in (2), mix 20 minutes;

[0061] (4) heat-treating the mixed rubber obtained in (3) at 180° C. for 1 hour, and then cooling;

[0062] (5) The rubber material obtained in (4) was remilled for the second time, and 5 kg of vulcanizing agent 2,4-dichlorobenzoyl and 0.05 kg of chloroplatinic acid were added to obtain a refractory sil...

Embodiment 2

[0067] Prepare refractory silicone rubber raw materials according to formula 2 in Table 1.

[0068] The preparation method of refractory silicone rubber is as follows:

[0069] (1) Mix 400 kg of methyl vinyl silicone rubber on an internal mixer for 5 minutes, then add 4 kg of hydrogen-containing silicone oil and 16 kg of hydroxyl silicone oil, and mix evenly;

[0070] (2) Add fumed white carbon black 80kg and silicon micropowder 120kg in the mixed rubber obtained in (1), and mix for 30 minutes to obtain high-tear high-strength silicone rubber mixed rubber;

[0071] (3) Add nano-montmorillonite 200kg and silicon carbide 100kg in the mixed rubber obtained in (2), and mix for 15 minutes;

[0072] (4) heat-treating the mixed rubber obtained in (3) at 180° C. for 1 hour, and then cooling;

[0073] (5) The rubber material obtained in (4) was remilled for the second time, and 4kg of vulcanizing agent 2,4-dichlorobenzoyl and 0.05kg of chloroplatinic acid were added to obtain a refra...

Embodiment 3

[0078] Prepare refractory silicone rubber raw materials according to formula 3 in Table 1.

[0079] The preparation method of refractory silicone rubber is as follows:

[0080] (1) Mix 500 kg of methyl vinyl silicone rubber on an internal mixer for 6 minutes, then add 8 kg of hydrogen-containing silicone oil and 10 kg of hydroxyl silicone oil, and mix evenly;

[0081] (2) add fumed white carbon black 150kg and silicon micropowder 50kg in the mixed rubber obtained in (1), mix for 40 minutes, make the silicone rubber mixed rubber of high tearing strength;

[0082] (3) Add nano-montmorillonite 100kg and silicon carbide 150kg in the mixed rubber obtained in (2), mix for 12 minutes;

[0083] (4) heat-treating the mixed rubber obtained in (3) at 130° C. for 4 hours, and then cooling;

[0084] (5) The rubber material obtained in (4) was remilled for the second time, and 5 kg of vulcanizing agent 2,4-dichlorobenzoyl and 0.05 kg of chloroplatinic acid were added to obtain a refractor...

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Abstract

The invention discloses a fire-resistant silicon rubber, which is prepared by the following raw materials by weight: 100 parts of silicon rubber, 0.1 to 3 parts of hydrogen-containing silicone oil, 2 to 15 parts of hydroxy silicone oil, 10 to 30 parts of pyrogenic silica, 10 to 30 parts of silicon epitaxy material, 20 to 50 parts of nanomontmorillonite, 10 to 30 parts of silicon carbide, 1 part of vulcanizing agent and less than 50 ppm of platinum compound calculating at the platinum quantity compared with the silicon rubber. The invention also provides a preparation method of the silicon rubber and a fire-resistant cable prepared with the silicon rubber. The fire-resistant silicon rubber has the performances such as stable fire resistance and good insulation performance, and has simple preparation method. The cable which is prepared with the fire-resistant silicon rubber has simple structure and convenient process. Particularly the reliability of the fire-resistant cable can be greatly improved.

Description

technical field [0001] The invention belongs to the field of refractory materials, and in particular relates to a refractory silicone rubber and a cable prepared therefrom. Background technique [0002] Wires and cables are widely distributed in every corner of power plants, underground facilities, buildings, etc. Once a fire breaks out and spreads rapidly, it will bring huge losses to people's lives and property. The fire-resistant cable is a cable that can still ensure the normal operation of the line for a certain period of time when a fire occurs, and can continue to transmit electrical energy and signals in the event of a fire. [0003] Copper core copper sheathed magnesium oxide insulated cable, called MI cable abroad, domestically referred to as mineral insulated cable or fireproof cable, it uses copper with high conductivity as conductor, inorganic magnesium oxide as insulation, seamless copper tube as sheath, Modern building wiring cables and cables for special ind...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08K13/02C08K3/36C08K3/34H01B3/28H01B7/295
Inventor 李伟刚何加英
Owner 浙江元通线缆制造有限公司
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