Fireproof damping silicone rubber and preparation method thereof

Abstract

The invention belongs to the technical field of rubber products, and particularly relates to a fireproof damping silicone rubber and a preparation method thereof. The fireproof damping silicone rubberis prepared from following components in parts by weight: 115-155 parts of a base material, 10-15 parts of a vitrification filler, 7-13 parts of a fluxing agent, 3-8 parts of a reinforcing agent and1-2 parts of a vulcanizing agent; wherein the base material is phenyl silicone rubber; the vitrification filler is a montmorillonite modified material; the fluxing agent is red mud, calcium oxide, lithium carbonate and potassium chloride; and the reinforcing agent is hydroxyapatite and serpentine powder. The provided silicone rubber has excellent fireproof and flame-retardant properties, high-temperature resistance, water resistance, oxidation resistance, mechanical properties, crusting properties, softening resistance and low-temperature resistance, is difficult to produce obvious cracks, does not crack or peel off even in case of mechanical vibration and water spraying, and can be applied to extreme environments.

Description

technical field [0001] The invention belongs to the technical field of rubber products, in particular to a fire-proof and shock-absorbing silicone rubber and a preparation method thereof. Background technique [0002] Silicone rubber is widely used in national defense, medical and health, industrial and agricultural production and people's daily life, and plays an increasingly important role in modern medicine. is the CO produced by the combustion of the side chain groups 2 and H 2 O, no toxic gas is produced, and it will not pollute the environment, so it is produced and applied in large quantities. [0003] In recent years, with the continuous increase of public transportation facilities, fire safety has become increasingly important. Fire-resistant cables at home and abroad mainly include magnesium oxide mineral-insulated fire-resistant cables and mica tape-wrapped inorganic-insulated fire-resistant cables. Although mineral-insulated fire-resistant cables have good fire...

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Problems solved by technology

[0003] In recent years, with the continuous increase of public transportation facilities, fire safety has become increasingly important. Fire-resistant cables at home and abroad mainly include magnesium oxide mineral insulated fire-resistant cables and mica tape-wrapped inorganic-insulated fire-resistant cables. Although mineral-insulated fire-resistant cables have good fire resistance performance, but its manufacturing process is complicated, the production cost is high, and the construction is very difficult, so it is difficult to be widely used

Although the mica tape-wrapped fire-resistant cable has a simple process, there is a common disadvantage of the mica tape. It becomes brittle after being burned at high temperature, and it is easy to pulverize and fall off after being subjected to severe vibration, resulting in poor fire-resistant effect. Therefore, we urgently need to study a fire-resistant and flame-retardant cable. The material provides greater protection for fire safety

[0004] Although silicone rubber has excellent mechanical properties, high temperature resistance, insulation, etc., the interaction force between the molecules of silicone rubber raw rubber is weak, and the molecular chain is extremely unstable, which makes the performance of silicone rubber poor. Patent CN104817844A discloses a fire-proof and heat-insulating silicone rubber, including the following components in mass percentage: base material 45-55%, high temperature resistant functional filler 10-15%, flame retardant 15-25%, reinforcing agent 10% -20%, other additives 1-5%, and the sum of the percentages of the above components is 100%. Although the silicone rubber product has fire-proof and heat-insulating properties, its hardness and tensile strength are poor. If the mechanical properties are low , when subjected to vibration or water at the fire scene, it may cause cracking and peeling of the wrapping layer, which cannot guarantee the normal operation of the line, or cracks will cause water to soak into the wire, and a short circuit will easily occur

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