Transparent double-component flame-retardant liquid silicone rubber perfusion material and preparation method thereof

A liquid silicone rubber, two-component technology, applied in the field of addition-type silicone rubber, can solve the problems of low tensile strength and tear strength of silicone rubber, unsuitable for electronic components, and ineffective flame retardancy, etc., to improve tensile strength Strength and tear strength, improvement of mechanical vibration resistance, improvement of hardness

Inactive Publication Date: 2021-04-20
浙江中特化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention has the advantages of providing an addition-type liquid silicone rubber with strong poison resistance, strong bonding performance, fast vulcanization speed, high transparency, good plumpness, and high mechanical strength, but its leveling property is poor. The tensile strength and tear strength of silicone rubber are relatively low, and it cannot be effectively flame-retardant in high-voltage or high-temperature environments, so it is not suitable for potting of electronic components

Method used

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  • Transparent double-component flame-retardant liquid silicone rubber perfusion material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: first add 50 parts of 10000mPa·s high-viscosity vinyl silicone oil, 30 parts of 5000mPa·s low-viscosity vinyl silicone oil, and 10 parts of fumed silica into the double planetary stirring tank, stir and mix for 20min, and then add 5 parts of 10000mPa·s vinyl silicone resin and 1 part of platinum catalyst, stir and mix for 15min, and finally keep the vacuum degree in the stirring tank at -0.1MPa, remove air bubbles, and prepare A component; similarly, first mix 50 parts of 10000mPa s high-viscosity vinyl silicone oil, 30 parts of 5000mPa·s low-viscosity vinyl silicone oil, and 10 parts of fumed silica were stirred and mixed for 20 minutes to form a base material, and then 5 parts of hydrogen-containing silicone oil with a hydrogen content of 1.5%, 0.02 1 part of inhibitor and 3 parts of tricresyl phosphate, stirred and mixed for 15 minutes and kept the vacuum degree in the kettle at -0.1 MPa to remove air bubbles to obtain component B. Fill component A and com...

Embodiment 2

[0042] Example 2: first add 10 parts of 100000mPa·s high-viscosity vinyl silicone oil, 70 parts of 500mPa·s low-viscosity vinyl silicone oil, and 5 parts of fumed silica into the double planetary stirring tank, stir and mix for 20min, and then add 15 parts of 5000mPa·s vinyl silicone resin and 2 parts of platinum catalyst, stirred and mixed for 15 minutes, and finally kept the vacuum degree in the stirred tank at -0.1MPa, and removed air bubbles to prepare A component; s high-viscosity vinyl silicone oil, 70 parts of 500mPa·s low-viscosity vinyl silicone oil, and 5 parts of fumed silica were stirred and mixed for 20 minutes to form a base material, and then 15 parts of hydrogen-containing silicone oil with a hydrogen content of 0.3%, 0.2 1 part of inhibitor and 1 part of benzotriazole, stirred and mixed for 15 minutes and kept the vacuum degree in the kettle at -0.1MPa to remove air bubbles to obtain component B. Fill component A and component B into a two-component rubber tub...

Embodiment 3

[0043]Example 3: first add 20 parts of 30000mPa·s high-viscosity vinyl silicone oil, 60 parts of 2000mPa·s low-viscosity vinyl silicone oil, and 8 parts of fumed silica into the double planetary stirring tank, stir and mix for 20min, and then add Mix 10 parts of 6500mPa·s vinyl silicone resin and 3 parts of platinum catalyst for 15 minutes, and finally keep the vacuum degree in the stirred tank at -0.1MPa to remove air bubbles to obtain component A; similarly, first mix 20 parts of 30000mPa·s s high-viscosity vinyl silicone oil, 60 parts of 2000mPa·s low-viscosity vinyl silicone oil, and 8 parts of fumed silica were stirred and mixed for 20 minutes to form a base material, and then 10 parts of hydrogen-containing silicone oil with a hydrogen content of 0.6%, 0.15 parts Inhibitor and 1.6 parts of triphenyl phosphate, stir and mix for 15 minutes and keep the vacuum degree in the kettle at -0.1MPa to remove air bubbles, and obtain component B. Fill component A and component B int...

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Abstract

The invention relates to the technical field of addition type silicone rubber, and discloses a transparent double-component flame-retardant liquid silicone rubber perfusion material which is composed of the following components: a component A comprising the following components: 10-50 parts of high-viscosity vinyl silicone oil, 30-70 parts of low-viscosity vinyl silicone oil, 5-15 parts of vinyl silicone resin, 5-15 parts of fumed silica and 1-5 parts of a catalyst; and the component B comprising the following components: 10-50 parts of high-viscosity vinyl silicone oil, 30-70 parts of low-viscosity vinyl silicone oil, 5-15 parts of hydrogen-containing silicone oil, 5-15 parts of fumed silica, 0.02-0.2 part of an inhibitor and 1-3 parts of a flame retardant. The prepared silicone rubber pouring material has good leveling property, silicone rubber formed after mixing and curing of the silicone rubber perfusion material has the characteristics of high tensile strength, high tearing strength, excellent flexibility, good mechanical vibration resistance, high transparency and good flame retardant effect, and is suitable for pouring of electronic components; and the practicability of the transparent double-component flame-retardant liquid silicone rubber pouring material is enhanced.

Description

technical field [0001] The invention relates to the technical field of addition-type silicone rubber, in particular to a transparent two-component flame-retardant liquid silicone rubber pouring material and a preparation method thereof. Background technique [0002] Liquid silicone rubber is a kind of elastomer rubber with excellent performance formed by crosslinking and curing based on medium and low viscosity linear polyorganosiloxane. It has excellent insulation, moisture permeability, chemical resistance, high temperature resistance and cold resistance. and many other advantages. According to the cross-linking mechanism, it can be divided into two types: condensation type and addition type. Among them, the condensation type liquid silicone rubber is cross-linked and cured by absorbing moisture in the environment, and the curing time is long, so it is not suitable for some occasions that require rapid curing. Correspondingly, the addition-type liquid silicone rubber can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/05C08K7/26C08K9/06C08K5/523C08K5/3475
Inventor 杨玉龙
Owner 浙江中特化工有限公司
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