A flame-retardant single-component moisture-cured silicone rubber and its construction method and application

A moisture-curing and moisture-curing technology, which is applied in the field of flame-retardant one-component moisture-curing silicone rubber and its construction, can solve the problems of difficulty in meeting practical application requirements, low comprehensive indicators, and short service life. The effect of flexible construction method, high electrical insulation strength and simple formula

Active Publication Date: 2020-11-06
HUNAN AEROSPACE SANFENG SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the defects of complicated construction, high repair rate, short service life, low comprehensive index and difficulty in meeting practical application requirements existing in current insulation and repair products of live facilities and equipment. Form-stable, flame-retardant, one-component moisture-curing silicone rubber

Method used

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  • A flame-retardant single-component moisture-cured silicone rubber and its construction method and application
  • A flame-retardant single-component moisture-cured silicone rubber and its construction method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Raw material pretreatment

[0028] Mix 90 parts of α, ω-terminated hydroxyl polydimethylsiloxane I (kinetic viscosity η = 800000cp), 10 parts of α, ω-terminated hydroxyl polydimethylsiloxane II (dynamic viscosity η = 500000cp), 30 parts Parts of hydrophobic fumed silica R974, 29 parts of activated superfine calcium carbonate, 38 parts of decabromodiphenylethane, and 2 parts of colored carbon black were placed in an oven at 120°C for 8 hours to dry for later use.

[0029] (2) Kneading and mixing of rubber materials

[0030] Put the α, ω-hydroxyl-terminated polydimethylsiloxane I and II pretreated in step (1) into the chamber of the vacuum kneader at one time, adjust the blade speed of the kneader, and heat it to 110°C. After mixing polydimethylsiloxane Ⅰ and Ⅱ evenly, add fumed white carbon black, superfine calcium carbonate, decabromodiphenylethane and colored carbon black powder raw materials in 5 times. The materials in the cavity have been kneaded into a paste....

Embodiment 2

[0034] (1) Raw material pretreatment

[0035] Mix 80 parts of α, ω-terminated hydroxyl polydimethylsiloxane I (kinetic viscosity η = 750000cp), 20 parts of α, ω-terminated hydroxyl polydimethylsiloxane II (dynamic viscosity η = 550000cp), 25 parts Parts of hydrophobic fumed silica R106, 25 parts of superfine silica powder, 32 parts of decabromodiphenylethyl ether, and 1.5 parts of colored carbon black were placed in an oven at 110°C for 6 hours and dried for later use.

[0036] (2) Kneading and mixing of rubber materials

[0037] Put the α, ω-hydroxyl-terminated polydimethylsiloxane I and II pretreated in step (1) into the chamber of the vacuum kneader at one time, adjust the blade speed of the kneader, and heat it to 105°C. After mixing polydimethylsiloxane Ⅰ and Ⅱ evenly, add fumed white carbon black, ultrafine silicon micropowder, decabromodiphenylethyl ether and colored carbon black powder in 4 times. The materials inside have been kneaded into a paste. After the powder...

Embodiment 3

[0041] (1) Raw material pretreatment

[0042] 100 parts of α, ω-terminated hydroxyl polydimethylsiloxane (kinetic viscosity η = 900000cp), 26 parts of hydrophobic fumed silica TS-720, 32 parts of activated nano-calcium carbonate, 24 parts of decabromodiphenylethylene Alkanes, 8 parts of antimony trioxide, and 1.2 parts of colored carbon black were placed in an oven at 125°C and dried for 10 hours, and set aside.

[0043] (2) Kneading and mixing of rubber materials

[0044] Put all the α, ω-terminated hydroxyl polydimethylsiloxane pretreated in step (1) into the material chamber of the vacuum kneader, adjust the speed of the blade of the kneader, and wait until the temperature is raised to 100°C, the gas phase silica , Nano-calcium carbonate, decabromodiphenylethane, antimony trioxide and colored carbon black powder raw materials are added in 5 times, and it should be ensured that the materials in the material cavity have been kneaded into a paste before each powder is added. ...

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Abstract

The invention provides a flame-retardant single-component moisture-curable silicone rubber and a preparation method and application thereof and belongs to the field of organic silicon rubber materials. The preparation method of the flame-retardant single-component moisture-curable silicone rubber is characterized in that alpha,omega-hydroxyl-terminated polydimethylsiloxane serves as a basic resin, alkoxy silane serves as a cross-linking agent, organic tin serves as a catalyst, meanwhile reinforcing filler, increment filler, a fire retardant, hydroxyl scavenging agent and other components are adopted for matching, and the silicone rubber is obtained through vacuum kneading and mixing, extrusion and lamination and vacuum package. The silicone rubber is a single-component band-shaped or flaky material, is stable in appearance, has a certain initial strength and flexibility, and has good insulativity, weather resistance, heat resistance, acid-base resistance and flame retardant properties after moisture curing. The silicone rubber has good appearance and plasticity, can be attached in a planar mode, wound and bound, or be plugged, blocked and filled in joints and has the wide application prospect in the fields of cable damage repairing, insulated protection of exposed electrical connecting points and the like. The flame-retardant single-component moisture-curable silicone rubber is simple in preparation process and is especially suitable for industrial production, and the raw materials are wide in source.

Description

technical field [0001] The invention relates to a flame-retardant single-component moisture-cured silicone rubber and its construction method and application, belonging to the field of silicone rubber materials. Background technique [0002] During the long-term use of urban power supply lines and cables, the insulating layer is easily damaged by various external factors. In addition, exposed live facilities and equipment such as high-voltage overhead lines, line clamps or line support insulators usually need to maintain a certain isolation space from the surrounding environment to prevent accidental electric shock from endangering personal or property safety. At present, there are some products on the market trying to solve this kind of problem, such as polyvinyl chloride electric tape for wrapping, polyurethane waterstop, etc., but these materials generally have poor weather resistance. Under the long-term effects of snow, frost, etc., it is easy to age and fall off, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/06C08K13/02C08K3/36C08K3/26C08K5/03C08K3/04
CPCC08K2003/265C08L83/06C08L2201/02C08L2201/08C08L2203/20C08L2205/025C08K13/02C08K3/36C08K3/26C08K5/03C08K3/04
Inventor 张刚罗绵卫阳区袁欢欢范金泽
Owner HUNAN AEROSPACE SANFENG SCI & TECH CO LTD
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