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Silicone rubber cable sheath for aerospace

A cable sheath, aerospace technology, applied in the direction of insulated cables, rubber insulators, cables, etc., can solve the problems of poor mechanical properties such as tensile strength and tear strength of silicone rubber, inferior physical and mechanical properties, and low environmental pollution. , to achieve good physical and mechanical properties, high vulcanization activity, and low environmental pollution.

Inactive Publication Date: 2015-07-22
ANHUI TIANCAI CABLE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The outstanding performance of silicone rubber is that it has a wide temperature range and can be used for a long time at -60°C to 250°C. However, the mechanical properties of silicone rubber such as tensile strength and tear strength are poor, and its physical and mechanical properties are not as good as most at room temperature. Synthetic rubber, silicone rubber molecular chain contains a lot of C and H, so silicone rubber itself is flammable, how to prepare a silicone rubber cable sheath with high tensile strength, tear resistance, flame retardancy, and less environmental pollution becomes Current technical issues to be resolved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A silicone rubber cable sheath for aerospace, its raw materials include by weight: 80 parts of methyl vinyl silicone rubber, 20 parts of acrylonitrile grafted EPDM rubber, 1.5 parts of hydrogen-containing silicone oil, 10 parts of hydroxyl silicone oil, 15 parts of fumed white carbon black, 20 parts of silicon micropowder, 30 parts of modified magnesium oxide, 28 parts of silicon carbide, 0.5 parts of DCP, 1.5 parts of bis-24, 20 parts of magnesium hydroxide / platinum complex;

[0019] Wherein the mass fraction of platinum complex in the magnesium hydroxide / platinum complex is 1.2×10 -16 The molecular weight of methyl vinyl silicone rubber is 450,000, wherein the vinyl content is 0.24mol%; the grafting rate of acrylonitrile grafted EPDM rubber is 9.75; the pH value of silicon micropowder is neutral, and two of them The content of silicon oxide is 84.5wt%, and the content of magnesia is 6.8wt%. In the silicon micropowder, the silicon micropowder with particle diameter les...

Embodiment 2

[0025] A silicone rubber cable sheath for aerospace, its raw materials include by weight: 82 parts of methyl vinyl silicone rubber, 18 parts of acrylonitrile grafted EPDM rubber, 2.5 parts of hydrogen-containing silicone oil, 9 parts of hydroxyl silicone oil, 20 parts of fumed white carbon black, 18 parts of micro-silicon powder, 35 parts of modified magnesium oxide, 27 parts of silicon carbide, 0.85 parts of DCP, 1.25 parts of double 24, 27 parts of magnesium hydroxide / platinum complex;

[0026] Wherein the mass fraction of platinum complex in the magnesium hydroxide / platinum complex is 1.2×10 -16 The molecular weight of methyl vinyl silicone rubber is 630,000, wherein the vinyl content is 0.18mol%; the grafting ratio of acrylonitrile grafted EPDM rubber is 11.43; the pH value of silicon micropowder is neutral, and two of them The content of silicon oxide is 78wt%, and the content of magnesia is 7.1wt%. Among the silicon micropowder, the silicon micropowder with particle diam...

Embodiment 3

[0032] A silicone rubber cable sheath for aerospace, its raw materials include by weight: 90 parts of methyl vinyl silicone rubber, 10 parts of acrylonitrile grafted EPDM rubber, 2.8 parts of hydrogen-containing silicone oil, 6 parts of hydroxyl silicone oil, 23 parts of fumed white carbon black, 15 parts of micro-silicon powder, 45 parts of modified magnesium oxide, 20 parts of silicon carbide, 1.2 parts of DCP, 1 part of double 24, 30 parts of magnesium hydroxide / platinum complex;

[0033] Wherein the mass fraction of platinum complex in the magnesium hydroxide / platinum complex is 1.2×10 -16 The molecular weight of methyl vinyl silicone rubber is 480,000, wherein the vinyl content is 0.22mol%; the grafting rate of acrylonitrile grafted EPDM rubber is 11; the pH value of silicon micropowder is neutral, and two of them The content of silicon oxide is 79.2wt%, and the content of magnesia is 6.85wt%. In the silicon micropowder, the silicon micropowder with a particle diameter le...

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Abstract

The invention discloses a silicone rubber cable sheath for aerospace. The silicone rubber cable sheath comprises the following raw materials by weight: 80 to 90 parts of methyl vinyl silicone rubber, 10 to 20 parts of acrylonitrile grafted EPDM rubber, 1.5 to 2.8 parts of hydrogen-containing silicone oil, 6 to 10 parts of hydroxyl silicone oil, 15 to 23 parts of fumed silica, 15 to 20 parts of fine silicon powder, 30 to 45 parts of modified magnesium oxide, 20 to 28 parts of silicon carbide, 0.5 to 1.2 parts of DCP, 1 to 1.5 parts of DCBP and 20 to 30 parts of a magnesium hydroxide / platinum complex, wherein the mass fraction of a platinum complex in the magnesium hydroxide / platinum complex is 1.2 * 10<-16>. The silicone rubber cable sheath has high tensile strength and tear strength, is flame-retardant, produces small environmental pollution and is simple to prepare.

Description

technical field [0001] The invention relates to the technical field of silicone rubber cable sheaths, in particular to a silicone rubber cable sheath for aerospace. 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 it is burning. It can continue to transmit electric energy and signals in the event of a fire. The main chain of silicone rubber is composed of silicon and oxygen atoms alternately. On the silicon atoms With organic groups, silicone rubber is widely used in the aerospace field due to its unique chemical stability, high and low temperature resistance, weather resistance, insulation and physiological inertness. The outstanding performance of silicone ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L51/06C08L83/05C08L83/06H01B3/28H01B7/295C08K13/06C08K9/06C08K9/00C08K3/22C08K3/36C08K3/02C08K3/34C08K5/00
Inventor 林新国
Owner ANHUI TIANCAI CABLE GRP
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