Method for preparing ceramifiable silicon rubber refractory material by adopting radiation crosslinking process

Abstract

The invention relates to a method for preparing a ceramifiable silicon rubber refractory material by adopting a radiation crosslinking process and belongs to the field of fire-resistant wires and cables. The method comprises the specific steps of: A-, evenly mixing 100 parts of methyl vinyl silicone rubber, 40-60 parts of ceramic powder, 40-65 parts of reinforcing filler, 3-5 parts of cyclosilazane and (5-20)*(10-5) parts of chloroplatinic acid to prepare daub-shaped silicon rubber; B-, extruding the daub-shaped silicon rubber to obtain a molded initial product of the ceramifiable silicon rubber refractory material; and C-, performing irradiation on the initial product by high-energy rays to obtain a product of the ceramifiable silicon rubber refractory material. The method for preparing the ceramifiable silicon rubber refractory material by adopting the radiation crosslinking process is convenient and energy-saving, is lower in cost, is easy in crosslinking degree control and is high in crosslinking efficiency. Toxic chemical additives are not used in the crosslinking process, and thus, the prepared vulcanizing silicone rubber is stable in physicochemical properties and is good in mechanical property and electrical property. The product is strong in weather fastness, ageing resistance and fatigue durability and is also longer in service life.

Description

technical field [0001] The invention relates to a vitrified silicon rubber refractory material and a preparation method thereof, in particular to a novel vitrified silicon rubber refractory material prepared by radiation crosslinking technology, which belongs to the field of fire-resistant wires and cables. Background technique [0002] Fire-resistant cables are widely used in important departments and public places such as high-rise buildings, subways, power plants, and nuclear power plants. Maintaining normal operation for a certain period of time will help rescue work and minimize casualties and property losses. [0003] At present, magnesium hydroxide mineral insulated fire-resistant cables are mostly used at home and abroad, and fire-resistant cables with mica tape wrapped with plastic or rubber composite insulation are used. The former has high manufacturing costs and is difficult to lay; the latter has certain instability. The mica tape is relatively thick, with high...

AI Technical Summary

Problems solved by technology

Because this method adopts the vulcanization method of introducing vulcanizing agent in silicone rubber, its disadvantages are: 1. The vulcanizing agent used has certain toxicity, which poses a threat to the health of the staff, and the vulcanizing agent produced in production The discharge of harmful gases and waste water will also pollute the environment

2. Using large-scale hot steam vulcanization equipment, the energy utilization rate is low

3. Compared with the radiation crosslinking method, the crosslinking speed of thermally vulcanized rubber is slower and the production efficiency is lower

4. The electrical properties of vulcanized silicone rubber treated with hot steam will be reduced to a certain extent

[0009] However, there have been no relevant reports on the application of radiation crosslinking technology to improve the performance of porcelain-able silicone rubber.

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