Preparation method of ceramizing fire-resistant silicon rubber

Abstract

The invention relates to a preparation method of ceramizing fire-resistant silicon rubber. The rubber comprises the following components in parts by weight: 100 parts of methyl vinyl silicon rubber, 20-50 parts of white carbon black, 2-10 parts of hydroxyl silicone oil, 1-5 parts of a coupling agent, 25-100 parts of ceramizing powder, 2-5 parts of a heat stabilizer, 10-40 parts of a fire retardant, and 1-2 parts of a vulcanizer. The preparation method includes the following steps: adding the methyl vinyl silicon rubber in a kneading machine; then adding the white carbon black and the hydroxyl silicone oil; mixing for 30 minutes at the temperature of 80 DEG C; then adding the coupling agent, the ceramizing powder, the heat stabilizer and the fire retardant; mixing for 1-1.5 hours; raising the temperature to be 100 DEG C and keeping high vacuum for 30 minutes; and after cooling to room temperature, adding the vulcanizer on an open mixing machine for mixing to obtain the ceramizing fire-resistant silicon rubber. The rubber has good mechanical property and electrical property at normal temperature, does not contain halogen, is smokeless and non-toxic during combustion, can be extinguished quickly and forms a ceramizing shell to guarantee integrity of the inside.

Description

technical field [0001] The invention relates to a novel polymer refractory material, in particular ceramicized refractory silicone rubber and a preparation method thereof. Background technique [0002] The flame retardancy and fire resistance of polymers play a vital role in many fields of national production and life. With the rapid growth of urban population, high-rise buildings, hotels, large supermarkets, hospitals, stations, and airports continue to increase. Subway, With the construction of tunnel traffic, as well as the increase of large-scale public entertainment venues and public transportation facilities, the importance of fire safety is highlighted. In the case of a fire, how to ensure the smooth flow of power and communication within a certain period of time, to maximize the precious time, to reduce casualties and loss of life and property, this is a subject that people have been constantly exploring. [0003] At present, most of the fire-resistant wires and cab...

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Problems solved by technology

[0005] Silicone rubber itself is not easy to ignite, its oxygen index is higher than that of rubber with carbon as the main chain, and it has good thermal stability. When burning, the heat release rate is low, the burning speed is slow, and there is no dripping phenomenon. No toxic gas is produced during the burning process. Flue gas is CO without any pollution to the environment 2 and H 2 O, has the characteristics of being a good flame retardant material, but the residual product silica after combustion is powdery with no strength, which limits its application in refractory materials

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