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High temperature mixing silicone rubber as well as preparation method and application thereof

A technology of mixing silicone rubber and high temperature, which is applied in the field of high temperature mixing silicone rubber and its preparation, can solve the problems of low compression deformation performance, etc., and achieve the effect of improving service life, prolonging time and prolonging service life

Active Publication Date: 2015-07-08
XINAN TIANYU SILICONE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ordinary silicone rubber cannot meet the requirements for the use of automotive seals, because automotive seals require low compression deformation performance in addition to the above-mentioned high temperature resistance below 250°C, small deformation after long-term use, and moreover require the ability to prevent water vapor, etc. Dirt soaks into the connectors, causing risks such as short circuits, improving automotive safety performance

Method used

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  • High temperature mixing silicone rubber as well as preparation method and application thereof
  • High temperature mixing silicone rubber as well as preparation method and application thereof
  • High temperature mixing silicone rubber as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Masterbatch

[0024] 70 parts of methyl vinyl raw rubber, molar vinyl content 0.09%; 10 parts of methyl vinyl raw rubber, molar vinyl content 1.0%; 20 parts of phenyl vinyl raw rubber, molar vinyl content 0.09%, molar benzene Base content of 30%, hydrophobic fumed silica 39 parts, BET specific surface area of ​​300; hydroxyl silicone oil 3.5 parts, hydroxyl molar content of 9.5%.

[0025] Put the raw material composed of masterbatch into the internal mixer and knead evenly at a temperature not higher than 100°C. The hydrophobic white carbon black is put into the internal mixer in 6 times; then the temperature is raised to 170°C, mixed for 3 hours, and then cooled to Below 30°C.

[0026] 2. Secondary cold refining

[0027] 100 parts of masterbatch; 5 parts of anti-aging additives (50wt% of cerium oxide, 25wt% of titanium dioxide; 25wt% of ferroferric oxide); 5 parts of low compression set additives (25wt% of magnesium oxide, 25wt% of calcium oxide, 5 parts of vi...

Embodiment 2

[0034] 1. Masterbatch

[0035] 80 parts of methyl vinyl raw rubber, molar vinyl content 0.09%; 10 parts of methyl vinyl raw rubber, molar vinyl content of 1.0%; 10 parts of phenyl vinyl raw rubber, molar vinyl content of 0.09%, molar benzene base content 30%; hydrophobic fumed silica 39 parts, BET specific surface area 300; hydroxyl silicone oil 3.5 parts, hydroxyl molar content 9.5%.

[0036] Put the raw material composed of masterbatch into the internal mixer and knead evenly at a temperature not higher than 100°C. The hydrophobic white carbon black is put into the internal mixer in 6 times; then the temperature is raised to 170°C, mixed for 3 hours, and then cooled to Below 30°C.

[0037] 2. Secondary cold refining

[0038] 100 parts of masterbatch; 8 parts of anti-aging additives (80wt% of cerium oxide, 15wt% of titanium dioxide; 5wt% of iron oxide); 8 parts of low compression set additives (30wt% of magnesium oxide, 40wt% of calcium oxide, vinyl silicon Oxane accounted...

Embodiment 3

[0044] 1. Masterbatch

[0045] 50 parts of methyl vinyl raw rubber, 0.23% molar vinyl content; 50 parts of phenyl vinyl raw rubber, 0.23% molar vinyl content, 30% molar phenyl content, 46 parts of hydrophobic fumed silica, BET ratio The surface area is 300; the hydroxyl silicone oil is 4.9 parts, and the hydroxyl molar content is 9.5%.

[0046] Put the raw material composed of masterbatch into the internal mixer and knead evenly at a temperature not higher than 100°C. The hydrophobic white carbon black is put into the internal mixer in 6 times; then the temperature is raised to 170°C, mixed for 3 hours, and then cooled to Below 30°C.

[0047] 2. Secondary cold refining

[0048] 100 parts of masterbatch; 3 parts of anti-aging additives (65wt% of cerium oxide, 10wt% of titanium dioxide; 25wt% of iron oxide); 3 parts of low compression set additives (50wt% of magnesium oxide, 30wt% of calcium oxide, vinyl silicon Oxane accounts for 20wt%) 2 parts; 8 parts of phenyl silicone...

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Abstract

The invention discloses high temperature mixing silicone rubber as well as a preparation method and an application thereof. According to the high temperature mixing silicone rubber disclosed by the invention, raw methyl phenyl vinyl silicone rubbers with different proportions are added in the raw methyl vinyl silicone rubber to serve as raw rubber, hydrophobic gas phase white carbon black is used as fillers, and ageing resistant additives are added, so that the obtained high temperature mixing silicone rubber has excellent high temperature ageing resistance. The high temperature mixing silicone rubber disclosed by the invention has the advantages of good high temperature ageing resistance, long service life, ultralow permanent compression deformation and is capable of automatically forming an oil film to isolate water vapor, and the like, and the high temperature mixing silicone rubber is particularly suitable for automobile sealing elements and has a good application prospect.

Description

[0001] technical field [0002] The invention relates to the field of silicone rubber production, in particular to a high-temperature mixing silicone rubber used for automobile seals and a preparation method thereof. Background technique [0003] With the development of the modern automobile industry, automobiles are no longer just a means of transportation, and consumers have higher and higher requirements for the appearance, interior space and safety performance of automobiles. However, the increase of the internal space is bound to compress the space of other parts or parts of the car, and these parts, especially electronic components, must generate a lot of heat when they work, which will inevitably lead to an increase in the working temperature in a small space, sometimes even Up to 200-250°C, at which temperatures the seals that connect individual electronic components, such as harness connectors, are subjected to the greatest impact. As we all know, seals are gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L83/06C08L83/04C08K13/02C08K3/36C08K3/22C08K5/5425
Inventor 周游何东冯文海吴家伟
Owner XINAN TIANYU SILICONE CO LTD
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