Production formula and production process of silicone rubber

Abstract

The invention discloses a production formula and a production process of silicone rubber, and belongs to the technical field of silicone rubber production. The formula comprises the following raw materials: silicone rubber, magnesium hydroxide, an A-171 silane coupling agent, simethicone, fumed silica, an A-151 silane coupling agent, an activating agent and vinyl silicone oil. The activating agentis a magnesium oxide activating agent, the magnesium oxide activating agent can improve the vulcanization speed of the rubber material and can improve the strength and the hardness of the vulcanizedrubber. The weight ratio of the raw materials are as follows in parts by weight: 100 parts of silicon rubber, 90-115 parts of magnesium hydroxide, 1-6 parts of the A-171 silane coupling agent, 3-6 parts of simethicone, 28-35 parts of fumed silica, 1-6 parts of A-151 the silane coupling agent, 4-10 parts of the activating agent and 1-6 parts of vinyl silicone oil. The prepared silicone rubber has the advantages of high temperature resistance, ozone resistance, weather resistance, electrical properties, favorable hydrophobicity, simple production technique and high efficiency, and is convenientfor adding raw materials and taking out the silicone rubber.

Description

technical field [0001] The invention relates to the technical field of silicone rubber production, and more specifically, relates to a production formula of silicone rubber and a production process thereof. Background technique [0002] Silicone rubber refers to the rubber whose main chain is composed of silicon and oxygen atoms alternately, and there are usually two organic groups attached to the silicon atoms. Ordinary silicone rubber is mainly composed of silicone chains containing methyl groups and a small amount of vinyl groups. The introduction of phenyl can improve the high and low temperature resistance of silicone rubber, and the introduction of trifluoropropyl and cyano can improve the temperature and oil resistance of silicone rubber. Silicone rubber has good low temperature resistance, and generally can still work at -55°C. After introducing phenyl, it can reach -73°C. The heat resistance of silicone rubber is also outstanding. It can work for a long time at 1...

AI Technical Summary

Problems solved by technology

In the prior art, in order to increase the tracking resistance of insulating rubber, a large amount of aluminum hydroxide is usually added to the formula, but this design improves the tracking resistance of the product, but at the same time due to the combination of aluminum hydroxide and The compatibility of silicone rubber is poor. This powdery filler greatly reduces the hydrophobicity of composite insulators. In the production process of silicone rubber, it is very troublesome to add raw materials and take out silicone rubber after production, which reduces production. efficiency

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