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Oil resistant silicone rubber

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

Inactive Publication Date: 2016-04-06
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 temperature resistance of the above rubber materials, and also solves the high cost problem of some rubber materials, also has good processing technology, and has good oil resistance

Method used

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preparation example Construction

[0087] A 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] providing the components described in the present invention;

[0089] The components are kneaded at 110-175° C., vacuumized 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 multi-feeding manner.

[0092] In a specific embodiment, 0.08% and 0.16% of raw rubber are put into the kneader, and the white carbon black is added in batches for about 3-4 times. When adding white carbon black, start to add hydroxyl silicone oil, and finally add hydrogen-containing silicone oil and dimethyl silicone oil when forming a group. Finally, the temperature in the kneader is about 110-120 ° C, and the rubber material is formed into a large group. Start vacuuming, ...

Embodiment 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 raw rubber 0.08% 71 parts, 0.16% 29 parts, molecular weight between 580,000 and 620,000, 2.2 parts of hydroxyl silicone oil, 1.4 parts of hydrogen-containing silicone oil, 1.1 parts of methyl silicone oil, 0.42 parts of zinc stearate, Degu Sai 928 white carbon black 42 parts, 3000 mesh clay 29 parts, polytetrafluoroethylene 9 parts, silane coupling agent A-1721.2 parts.

[0101] The glue process is as follows:

[0102] Put 0.08% and 0.16% raw rubber into the kneader, add the silica in batches for about 3-4 times, add the next silica after each formation, and start adding the silica for the second time Hydroxyl silicone oil, add hydrogen-containing silicone oil and methyl silicone oil when forming a group at the end, the temperature in the kneader is about 110-120 ℃, the rubber material forms a large group, start vacuuming, the vacuum deg...

Embodiment 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 580,000-620,000, 2.2 parts of hydroxyl silicone oil, 1.4 parts of hydrogen-containing silicone oil, 1.1 parts of methyl silicone oil, 42 parts of precipitated white carbon black, 3000 29 parts of clay, 9 parts of polytetrafluoroethylene, 1721.2 parts of silane coupling agent A-172.

[0109] The glue process is as follows:

[0110] Put 0.08% and 0.16% raw rubber into the kneader, add the silica in batches for about 3-4 times, add the next silica after each formation, and start adding the silica for the second time Hydroxyl silicone oil, add hydrogen-containing silicone oil and methyl silicone oil when forming a group at the end, the temperature in the kneader is about 110-120 ℃, the rubber material forms a large group, start vacuuming, the vacuum degree is -0.075±0.002, and the v...

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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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Patent Type & Authority Patents(China)
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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