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Two-component flame-retardant liquid silicone rubber for insulator and preparation method thereof

A liquid silicone rubber, two-component technology, applied in the field of two-component flame retardant liquid silicone rubber and its preparation, can solve the problems of high viscosity of rubber compound, no mention of flame retardant performance, damage to internal components of insulators, etc.

Active Publication Date: 2019-01-04
CHENGDU GUIBAO SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN104744943A mentions a thermally vulcanized silicone rubber for insulators, which has excellent electrical properties and flame retardancy up to V-0 level, but the rubber has a high viscosity and is molded, which may easily cause damage to the internal components of the insulator
Patent CN1730561A mentions a liquid silicone rubber that can be used for insulators, but does not mention its flame retardancy

Method used

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  • Two-component flame-retardant liquid silicone rubber for insulator and preparation method thereof
  • Two-component flame-retardant liquid silicone rubber for insulator and preparation method thereof
  • Two-component flame-retardant liquid silicone rubber for insulator and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] 1. Use the mixed silicone oil obtained by mixing 0.5Pa·s and 6Pa·s vinyl silicone oil to prepare the base rubber

[0033] a) Add 100 parts of mixed vinyl silicone oil to a kneader and knead for 3 minutes;

[0034] b) Set the specific surface area to 150m 2 g -1 50 parts of fumed white carbon black, 8 parts of hexamethyldisilazane, 1.2 parts of tetramethyldivinylsilazane and 4 parts of water were added to the kneader several times and fully kneaded after each addition. Knead at room temperature for 1 hour after the addition is complete;

[0035] c) heating up to 80°C and kneading for 2 hours;

[0036] d) Raise the temperature to 150°C, vacuumize for 2 hours, cool down and release the gel to obtain the basic silica gel.

[0037] 2. Preparation of component A: 100 parts of basic silica gel, 15 parts of mixed vinyl silicone oil, 10 parts of hydrogen-containing silicone oil with a viscosity of 20mPa·s and a hydrogen content of 0.45%, 8 parts of a flame retardant (m 1 =2...

Embodiment 2

[0041] 1. Use the mixed silicone oil obtained by mixing 2Pa s and 20Pa s vinyl silicone oil to prepare the base rubber

[0042] a) Add 100 parts of mixed vinyl silicone oil to a kneader and knead for 3 minutes;

[0043] b) Set the specific surface area to 300m 2 g -1 40 parts of fumed white carbon black, 10 parts of hexamethyldisilazane, 1.5 parts of tetramethyldivinylsilazane and 3 parts of water were added to the kneader several times, fully kneaded after each addition, and Knead at room temperature for 1 hour after completion;

[0044] c) heating up to 80°C and kneading for 2 hours;

[0045] d) Raise the temperature to 150°C, vacuumize for 2 hours, cool down and release the gel to obtain the basic silica gel.

[0046] 2. Preparation of component A: 100 parts of basic silica gel, 20 parts of mixed vinyl silicone oil, 5 parts of flame retardant (m 1 =50,m 2 =100, n=1), 8 parts of hydrogen-containing silicone oil with a hydrogen content of 0.72%, and 0.05 parts of an inh...

Embodiment 3

[0050] 1. Use the mixed silicone oil obtained by mixing 1Pa s and 200Pa s vinyl silicone oil to prepare the base rubber

[0051] a) Add 100 parts of mixed vinyl silicone oil to a kneader and knead for 3 minutes;

[0052] b) Set the specific surface area to 200m 2 g -1 60 parts of fumed white carbon black, 6 parts of hexamethyldisilazane, 1.5 parts of tetramethyldivinylsilazane and 3 parts of water were added to the kneader several times, fully kneaded after each addition, and added Knead at room temperature for 1 hour after completion;

[0053] c) heating up to 80°C and kneading for 2 hours;

[0054] d) Raise the temperature to 150°C, vacuumize for 2 hours, cool down and release the gel to obtain the basic silica gel.

[0055] 2. Preparation of component A: 100 parts of basic silica gel, 5 parts of mixed vinyl silicone oil, 20 parts of flame retardant (m 1 =10, m 2 =100, n=2), 6 parts of hydrogen-containing silicone oil with a hydrogen content of 0.8%, and 0.05 parts of ...

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Abstract

The invention discloses a preparation method of two-component flame-retardant liquid silicone rubber for an insulator. The preparation method includes: preparing a component A: adding 100 parts of basic silica gel, 0-50 parts of ethylene silicone oil, 5-20 parts of flame retardant, 4-20 parts of crosslinking agent, 0-12 parts of chain extender and 0.01-5 parts of inhibitor into a planetary stirreror a high-speed diperser for vacuum stirring for 0.5-2h, stirring well, de-bubbling, and filtering to remove impurities; preparing a component B: adding 100 parts of basic silica gel, 5-50 parts of ethylene silicone oil, 5-20 parts of flame retardant and 0.05-2 parts of platinum complex for vacuum stirring for 0.5-2h, stirring well, de-bubbling, and filtering to remove impurities. The silicone rubber is long in operable time at normal temperature, can quickly solidify in a few minutes at high temperature, is in high insulativity and excellent in flame-retardant performance and meets using requirements of an electrical insulator.

Description

technical field [0001] The invention relates to a two-component flame-retardant liquid silicone rubber, in particular to a two-component flame-retardant liquid silicone rubber used for electrical equipment insulators and a preparation method thereof. Background technique [0002] Silicone rubber has good high and low temperature resistance, weather resistance, insulation and other excellent properties, so that silicone rubber can be used to make electrical equipment insulators. Patent CN104744943A mentions a thermally vulcanized silicone rubber for insulators, which has excellent electrical properties and flame retardancy up to V-0 level, but the rubber has a high viscosity and is easy to cause damage to the internal components of the insulator when it is molded. Patent CN1730561A mentions a liquid silicone rubber that can be used for insulators, but does not mention its flame retardancy. [0003] The present invention relates to a two-component flame-retardant liquid silic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08K9/06C08K3/36
CPCC08L83/04C08L2201/02C08L2205/025C08L2205/035C08K9/06C08K3/36
Inventor 陈相全邓博夫黄强骆捷罗晓锋王有治
Owner CHENGDU GUIBAO SCI & TECH