Refractory silicone rubber, preparation method therefor and conducting wire

Abstract

The invention discloses refractory silicone rubber, a preparation method therefor and a conducting wire. The refractory silicone rubber is prepared from the following raw materials in parts by weight:100 parts of methylvinyl silicone rubber, 10-70 parts of reinforcing filler, 20-150 parts of porcelain forming filler, 0-50 parts of silica micropowder, 3-20 parts of structuring control agent, 0.1-5parts of couplant, 3 ppm to 200 ppm of platinum compound or complex by content of platinum and 0.5-5 parts of vulcanizer. According to the technical scheme of the invention, through effectively matching the above-mentioned several kinds of materials, the refractory silicone rubber with excellent mechanical and processing properties, high porcelain forming speed, no sintering cracking and high residue level can be obtained.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a refractory silicone rubber, a preparation method thereof, and a wire prepared from the refractory silicone rubber. Background technique [0002] With the progress of society and the improvement of people's living standards, the country pays more and more attention to safety. Especially in the field of wire and cable, once a fire occurs during operation, it may cause chain combustion, affect fire protection and rescue of personnel, and cause unpredictable loss of human life and property. Fire-resistant wire and cable has become an inevitable trend in the field of wire and cable. [0003] The traditional refractory materials used to produce fire-resistant wires and cables are mainly mica tape, magnesium oxide, and refractory mud, but there are complex processing techniques, cumbersome production equipment, expensive laying costs, complex cable structures, easy moist...

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Problems solved by technology

[0003] The traditional refractory materials used to produce fire-resistant wires and cables are mainly mica tape, magnesium oxide, and refractory mud, but there are complex processing techniques, cumbersome production equipment, expensive laying costs, complex cable structures, easy moisture absorption, and easy to fall off after ablation, etc. Disadvantages: In recent years, the emerging ceramic refractory silicone rubber and ceramic polyolefin polymer composite materials have solved the above problems to a large extent and have been successfully used in medium and low voltage fire-resistant cables.

[0004] At present, the existing ceramic silica gel and other polymer composite materials on the market generally have the disadvantages of easy cracking after burning candles, poor ductility, high sintering temperature, slow sintering speed, and easy breakdown to cause short circuit, so the application is limited, especially In the fire-resistant wire industry with simple structure, it cannot meet the test requirements of BS6387 and GB / T19216 and other fire-resistant standards

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