Oil-resistant silicon rubber

A silicone rubber and oil-resistant technology, applied in the field of oil-resistant silicone rubber, can solve the problems of high cost and low temperature resistance of rubber materials

Inactive Publication Date: 2012-07-18
上海旭创高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The first object of the present invention is to obtain a kind of oil-resistant silicone rubber composition, this rubber material solves the characteristics of the high temp

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0087] The third aspect of the present invention provides a method for preparing the oil-resistant silicone rubber of the present invention, which includes the following steps:

[0088] Provide the components of the present invention;

[0089] The components are kneaded at 110-175°C, and then vacuumed and molded to obtain oil-resistant silicone rubber.

[0090] Preferably, the components are kneaded at 110-120°C.

[0091] In a specific embodiment of the present invention, the components are fed in a multiple feeding manner.

[0092] In a specific embodiment, the raw rubber 0.08% and 0.16% are put into the kneader, and the white carbon black is added in batches about 3-4 times. After each agglomeration, the next white carbon black is added. When adding white carbon black, start adding hydroxy silicone oil, and finally adding hydrogen-containing silicone oil and dimethyl silicone oil when forming a dough. Finally, the temperature in the kneader is about 110-120°C, the rubber material bec...

Example Embodiment

[0098] Example 1

[0099] Summary of the invention: The formula is as follows by improving the ratio of silica gel and raw materials:

[0100] Use methyl vinyl rubber 0.08% 71 parts, 0.16% 29 parts, molecular weight 580-62 million, hydroxy silicone oil 2.2 parts, hydrogen silicone oil 1.4 parts, methyl silicone oil 1.1 parts, zinc stearate 0.42 parts, Degu 42 parts of Sai 928 white carbon black, 29 parts of 3000 mesh clay, 9 parts of polytetrafluoroethylene, silane coupling agent A-1721.2 parts.

[0101] The glue process is as follows:

[0102] Put the raw rubber 0.08% and 0.16% into the kneader, add the white carbon black in batches about 3-4 times, add the next white carbon black after each agglomeration, and start adding the white carbon black the second time Hydroxy silicone oil, add hydrogen-containing silicone oil and methyl silicone oil when the final agglomeration is formed, and finally the temperature in the kneader is about 110-120℃, the rubber material becomes a large grou...

Example Embodiment

[0106] Example 2

[0107] Summary of the invention: The formula is as follows by improving the ratio of silica gel and raw materials:

[0108] Use methyl vinyl raw rubber 0.07% 71 parts, 0.15% 29 parts, molecular weight between 580 and 620,000, hydroxy silicone oil 2.2 parts, hydrogen silicone oil 1.4 parts, methyl silicone oil 1.1 parts, precipitation method white carbon black 42 parts, 3000 29 parts of mesh clay, 9 parts of polytetrafluoroethylene, and silane coupling agent A-1721.2 parts.

[0109] The glue process is as follows:

[0110] Put the raw rubber 0.08% and 0.16% into the kneader, add the white carbon black in batches about 3-4 times, add the next white carbon black after each agglomeration, and start adding the white carbon black the second time Hydroxy silicone oil, add hydrogen-containing silicone oil and methyl silicone oil when the final agglomeration is formed, and finally the temperature in the kneader is about 110-120℃, the rubber material becomes a large group, a...

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PUM

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Abstract

The invention provides an oil-resistant silicon rubber composition. The composition comprises the following components in parts by weight: (a) crude methylvinyl silicon rubber including 71+/-2 parts of methylvinyl silicon rubber containing 0.07-0.09 percent of vinyl and 29+/-2 parts of methylvinyl silicon rubber containing 0.15-0.17 percent of vinyl, wherein the number average molecular weights of the two types of rubber are 580,000-620,000, (b) 2.2+/-0.5 parts of hydroxyl silicon oil, (c) 1.4+/-0.2 parts of hydrogen-containing silicon oil and (d) an oil-resistant component including 42+/-10 parts of white carbon black which is precipitated white carbon black, 1.1+/-0.2 parts of dimethyl silicon oil of which the polymerization degree is between 150 and 300, 9+/-2 parts of pot clay of 3000+/-500 meshes, and 5+/-0.5 parts of polytetrafluoroethylene, wherein the total weight of the components (a), (b), (c) and (d) accounts for 90-100 percent of the total weight of the composition. The invention further provides oil-resistant silicon rubber and a preparation method and an application thereof.

Description

technical field [0001] The invention relates to a silicone rubber, in particular to an oil-resistant silicone rubber. The oil-resistant silicone rubber can be used to make O-rings, ignition coils, rubber rollers, gaskets and the like. Background technique [0002] At present, there is a wide demand for oil-resistant adhesives. There are also many types of oil-resistant rubber on the market, the main varieties are nitrile, hydrogenated nitrile, and fluorosilicone rubber. Among them, nitrile rubber, hydrogenated nitrile rubber, etc. have good oil resistance, but cannot withstand high temperature; meanwhile, the cost of hydrogenated nitrile and fluorosilicone is very high. [0003] The current silicone rubber is kneaded by methyl vinyl raw rubber, white carbon black, hydroxyl silicone oil, hydrogen-containing silicone oil and zinc stearate through a kneader at high temperature, but the obtained silicone rubber has poor oil resistance. [0004] To sum up, there is a lack of a...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/06C08L83/05C08L83/04C08L27/18C08K3/36C08K3/34
Inventor 黄丽赵福臻
Owner 上海旭创高分子材料有限公司
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