Single-component room-temperature-vulcanized fluorosilicone rubber and preparation method thereof

A room temperature vulcanization, fluorosilicone rubber technology, applied in the field of one-component room temperature vulcanized fluorosilicone rubber and its preparation, can solve the problems of reduced tear strength, poor cold resistance of fluororubber, poor compatibility between fluororubber and silicone rubber, etc. , to achieve the effect of good performance, good sealing and bonding performance, and excellent oil resistance

Active Publication Date: 2014-08-27
安徽斯迈特新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fluorine rubber and silicone rubber have poor compatibility, even if they are mixed, the mechanical strength, tensile strength, tear strength and other properties of the mixed rubber will be significantly reduced, and will delaminate during use
In addition, after mixed use, the cold resistance of fluorine rubber deteriorates
At present, there is no domestic patent report on the preparation of one-component room temperature vulcanized fluorosilicone rubber. US5342879 and US6369155 are organopolysiloxanes with trifluoropropyl groups added with fillers and vulcanizing agents to prepare oil-resistant fluorine-containing high-temperature vulcanized silicon rubber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Under the protection of dry nitrogen, 1500 grams of hydroxyl-terminated fluoropolysiloxane (25 ° C, 50000 mpa s), 300 grams of heavy calcium, 150 grams of LM-150 (gas-phase silica, produced by Cabot Corporation), Add 150 grams of methyl tributyl ketoxime silane, 30 grams of vinyl tributyl ketoxime silane, 30 grams of KH550, 15 grams of KH560, 3 grams of dibutyltin dilaurate and 20 grams of methyl fluorine-containing silicone oil into the high-speed dispersion After dispersing evenly in the kettle at high speed, use polyethylene plastic bottles for airtight packaging. The performance test of the obtained one-component room temperature vulcanized fluorosilicone rubber is shown in Table 1.

Embodiment 2

[0024] Under the protection of dry nitrogen, 1,500 grams of hydroxyl-terminated fluoropolysiloxane (25 ° C, 50,000 mpa s), 300 grams of titanium dioxide, 150 grams of LM-150 (gas-phase silica, produced by Cabot Corporation), Add 120 grams of methyltriacetoxysilane, 40 grams of KH560, 3 grams of tin acetate and 20 grams of methyl fluorine-containing silicone oil into the high-speed dispersion kettle in sequence. After uniform dispersion at high speed, use polyethylene plastic bottles for airtight packaging. The performance test of the obtained one-component room temperature vulcanized fluorosilicone rubber is shown in Table 1.

Embodiment 3

[0026] Under the protection of dry nitrogen, 1000 grams of hydroxyl-terminated fluoropolysiloxane with a viscosity of 80000mpa·s, 500 grams of hydroxyl-terminated fluoropolysiloxane with a viscosity of 20000mpa·s, and 300 grams of nano-calcium (modified light calcium carbonate), 150 grams of LM-150 (fumed white carbon black, produced by Cabot), 150 grams of methyltrimethoxysilane, 30 grams of isopropyl titanate, 30 grams of KH550, 15 grams of KH560, 3 grams Add dibutyltin dilaurate and 20 grams of methyl fluorine-containing silicone oil into the high-speed dispersion kettle in sequence, and after high-speed dispersion is uniform, use polyethylene plastic bottles for airtight packaging. The performance test of the obtained one-component room temperature vulcanized fluorosilicone rubber is shown in Table 1.

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Abstract

The invention discloses a one-component room temperature vulcanized fluorosilicone rubber, which is made of the following raw materials in parts by weight: 100 parts of hydroxyl-terminated fluorine-containing polysiloxane; 1-30 parts of inorganic filler; 3-30 parts of crosslinking agent 15 parts; 2-5 parts of silane coupling agent; 0-3 parts of titanate coupling agent; 0.1-0.5 parts of catalyst; 0-2 parts of methyl fluorine-containing silicone oil. The one-component room temperature vulcanized fluorosilicone rubber is in a closed high-speed disperser under the protection of dry nitrogen at room temperature, and the raw materials are evenly dispersed and then sealed in a package. The one-component room temperature vulcanized fluorosilicone rubber of the present invention has excellent oil resistance and good sealing and bonding performance, and can be used for fuel-resistant seals such as aircraft and automobile fuel tank seals, oil depots and oil tanker pipeline seals, and can be cured into elasticity at room temperature It is easy to process and apply, and has good performance. It is an indispensable oil-resistant sealing material for my country's aviation industry and automobile industry.

Description

technical field [0001] The invention relates to a one-component room temperature vulcanized fluorosilicone rubber and a preparation method thereof. Background technique [0002] Room temperature vulcanized silicone rubber (RTV) is a silicone rubber product that came out in the 1960s. This rubber has good heat resistance, cold resistance and excellent electrical insulation properties of silicone rubber. More importantly, it is easy to use and can be used at room temperature. It can be vulcanized without heat or pressure. One-component room temperature vulcanized silicone rubber is made by mixing all its components evenly and packing them in a sealed container. When used, it is extruded from the sealed container and cross-linked into a silicone elastomer after contacting water in the air. Because fluororubber has excellent heat resistance, oil resistance, fuel resistance, compression recovery and other properties, fluororubber is widely used as some parts of automobiles, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/08C08K13/02C08K5/54
Inventor 田建国侯智杰
Owner 安徽斯迈特新材料股份有限公司
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