Silicon rubber with excellent electric arc resistant performance and preparation method thereof

Abstract

The invention provides silicon rubber with excellent electric arc resistant performance and a preparation method thereof. The silicon rubber comprises the following raw materials in parts by weight: 100 parts of crude silicon rubber, 50-200 parts of ATH (Aluminum Hydroxide), 25-100 parts of BN (Boron Nitride), 0.5-3.5 parts of vulcanizer, 1-3 parts of TAIC (Triallyisocyanurate), 1-5 parts of hydroxyl silicone oil, 1-5 parts of silane coupling agent and 100 parts of inorganic filler, wherein the inorganic filler is composed of the ATH and the BN. According to the silicon rubber provided by theinvention, an emulsion and the crude silicon rubber is directly subjected to emulsion blending on a double roller rubber mixing mill, thereby improving the dispersion and avoiding rising of nano-particles; by adding the BN on the basis of filling the ATH, the silicon rubber has less mass loss after high-voltage low current arc resistance test; meanwhile, the electric arc is always disassociated on the surface of the material in the electric arc ablation process; furthermore, the surface of the material has no burning phenomenon; the surface of the material only appears little yellowing after the test; and little black residue appears near an electrode.

Description

【Technical field】 [0001] The invention belongs to the field of electrical insulating polymer materials, in particular to a silicone rubber and a preparation method thereof. 【Background technique】 [0002] Silicone rubber materials have excellent comprehensive properties and are widely used in the field of electrical insulation, and have shown a rising trend in recent years. Since the main chain of silicone rubber is composed of silicon-oxygen bonds, silicon-oxygen bonds have greater bond energy than C-C bonds, and the Si element itself is not flammable, so silicone rubber has very good properties, such as its heat resistance, cold resistance Resistance, ozone aging resistance, weather resistance and good electrical insulation properties, as well as corona resistance and arc resistance. At the same time, silicone rubber also has a very wide temperature range, from -50°C to 300°C, which determines that silicone rubber is a very good electrical insulating material. [0003] A...

AI Technical Summary

Problems solved by technology

Although silicone rubber itself has certain corona resistance and arc resistance, in the case of arc ablation, its own arc resistance is far from meeting the requirements.

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