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High temperature resistant silicone rubber and preparation method thereof

A technology of high temperature resistant silicone rubber and silicone rubber, applied in the field of silicone rubber, can solve the problem of unsatisfactory high temperature resistance, and achieve the effects of improving heat resistance, good mechanical strength and processability, and preventing cross-linking and degradation.

Inactive Publication Date: 2019-10-15
DONGGUAN TIANAN SILICONES TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high temperature resistance of general silicone rubber is at 200-220 ° C. In the fields of aviation, aerospace, metallurgy, chemical processing and other fields, its high temperature resistance still cannot meet the existing production needs.

Method used

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  • High temperature resistant silicone rubber and preparation method thereof
  • High temperature resistant silicone rubber and preparation method thereof
  • High temperature resistant silicone rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A kind of high temperature resistant silicon rubber, described high temperature resistant silicon rubber comprises the raw material of following weight part:

[0050]

[0051]

[0052] The silicone rubber is a mixture of methyl vinyl silicone rubber A, methyl vinyl silicone rubber B and methyl vinyl silicone rubber C in a weight ratio of 20:50:30; wherein the methyl vinyl The vinyl content of silicone rubber A is 0.02%, and the molecular weight is 650,000; the vinyl content of the methyl vinyl silicone rubber B is 0.16%, and the molecular weight is 850,000; the vinyl content of the methyl vinyl silicone rubber C is The content is 0.04%, and the molecular weight is 550,000.

[0053] The reinforcing agent is a mixture of fumed white carbon black and precipitated white carbon black at a weight ratio of 1:3, and the specific surface area of ​​the fumed white carbon black is 200m 2 / g, the specific surface area of ​​the precipitated silica is 160m 2 / g; the platinum v...

Embodiment 2

[0072] A kind of high temperature resistant silicon rubber, described high temperature resistant silicon rubber comprises the raw material of following weight portion:

[0073]

[0074] The silicone rubber is a mixture of methyl vinyl silicone rubber A, methyl vinyl silicone rubber B and methyl vinyl silicone rubber C in a weight ratio of 25:47:28; wherein the methyl vinyl The vinyl content of silicone rubber A is 0.03%, and the molecular weight is 680,000; the vinyl content of the methyl vinyl silicone rubber B is 0.15%, and the molecular weight is 830,000; the vinyl content of the methyl vinyl silicone rubber C is The content is 0.05%, and the molecular weight is 580,000.

[0075] The reinforcing agent is a mixture of fumed white carbon black and precipitated white carbon black at a weight ratio of 1:3.2, and the specific surface area of ​​the fumed white carbon black is 220m 2 / g, the specific surface area of ​​the precipitated silica is 170m 2 / g; the platinum vinyl c...

Embodiment 3

[0095] A kind of high temperature resistant silicon rubber, described high temperature resistant silicon rubber comprises the raw material of following weight part:

[0096]

[0097] The silicone rubber is a mixture of methyl vinyl silicone rubber A, methyl vinyl silicone rubber B and methyl vinyl silicone rubber C in a weight ratio of 30:45:25; wherein the methyl vinyl The vinyl content of silicone rubber A is 0.04%, and the molecular weight is 700,000; the vinyl content of the methyl vinyl silicone rubber B is 0.15%, and the molecular weight is 800,000; the vinyl content of the methyl vinyl silicone rubber C is The content is 0.06%, and the molecular weight is 600,000.

[0098]The reinforcing agent is a mixture of fumed white carbon black and precipitated white carbon black at a weight ratio of 1:3.5, and the specific surface area of ​​the fumed white carbon black is 250m 2 / g, the specific surface area of ​​the precipitated silica is 180m 2 / g; the platinum vinyl compl...

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Abstract

The invention relates to the technical field of silicone rubber, and in particular relates to high-temperature resistant silicone rubber and a preparation method thereof. The high temperature resistant silicone rubber comprises the following raw materials in parts by weight: 90-100 parts of silicone rubber, 20-25 parts of a reinforcing agent, 3-8 parts of a high temperature resistant agent, 0.5-1.0 parts of a platinum vinyl complex, 0.3-0.8 part of hexaphenyl cyclotrisiloxane, 0.1-0.5 part of zinc stearate, 1-1.5 parts of a structure control agent, 10-12 parts of a synergist, 2-3 parts of a coupling agent and 2-4 parts of a vulcanizing agent. The high-temperature resistant silicone rubber prepared by the method is nontoxic and environment-friendly, has excellent high-temperature resistantperformance, has better tensile strength, elongation at break, tear strength and other properties, has high mechanical strength, simultaneously has flame retardant and fireproof properties, and has high stability.

Description

technical field [0001] The invention relates to the technical field of silicone rubber, in particular to a high-temperature-resistant silicone rubber and a preparation method thereof. Background technique [0002] Because silicone rubber products have excellent comprehensive performance and good technical and economic effects, they have been widely used in atomic energy, electrical appliances, electronics, instruments, automobiles, machinery, medical and health, and daily life, and are closely related to people's lives. , remote controls, keyboards, POS machines, scanners, mobile phones, electronic dictionaries, mobile phone cases, etc. are all related to silicone rubber products. [0003] Silicone rubber is a silicone polymer with Si-O bond as the main chain. The side groups are usually composed of methyl, phenyl, trifluoropropyl and other substituents. Its molecular main chain is composed of silicon atoms and oxygen atoms alternately. (-Si-O-Si-), so that silicone rubber ...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08K13/06C08K9/04C08K3/22C08K3/40C08K7/26C08K3/36
CPCC08K2003/2213C08K2003/2272C08K2201/003C08K2201/006C08K2201/011C08L83/04C08L2201/08C08L2205/025C08L2205/03C08L2312/00C08K13/06C08K9/04C08K3/22C08K3/40C08K7/26C08K3/36
Inventor 成家新
Owner DONGGUAN TIANAN SILICONES TECH
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