Preparation process for silicone rubber cable sheath used for ship

Abstract

The invention discloses a preparation process for a silicone rubber cable sheath used for a ship. The preparation process comprises the following steps: mixing methyl vinyl silicone rubber, liquid silicone rubber, hydrogen-containing silicone oil, vinyl-terminated silicone oil and branched-chain vinyl silicone oil for 5 to 8 mi, then adding acetylene carbon black and modified magnesium hydroxide and carrying out mixing for 30 to 50 min so as to obtain premixed rubber; adding white carbon black, modified corundum powder and silicon carbide into the premixed rubber, carrying out uniform mixing so as to obtain mixed stock, heating the mixed stock to a temperature of 150 to 160 DEG C and maintaining the temperature for 1 to 4 h so as to obtain a rubber compound; and subjecting the rubber compound to secondary remilling, then adding an organic peroxide vulcanizing agent and a platinum compound and successively carrying out uniform mixing, extrusion molding and vulcanization so as to obtain the silicone rubber cable sheath used for the ship. The silicone rubber cable sheath prepared in the invention has the advantages of stable fire resistance, good insulating properties and good mechanical properties; and the preparation process is simple and poses little environmental pollution.

Description

technical field [0001] The invention relates to the technical field of silicone rubber cable sheaths, in particular to a preparation process for a silicone rubber cable sheath for ships. Background technique [0002] The main chain of silicone rubber is composed of silicon and oxygen atoms alternately, with organic groups on the silicon atoms. Silicone rubber is widely used in the field of ships due to its unique chemical stability, high and low temperature resistance, weather resistance, insulation and physiological inertia. The outstanding performance of silicone rubber is that it can be used in a wide temperature range and can be used for a long time at -60°C to 250°C. However, the mechanical properties of silicone rubber such as tensile strength and tear strength are poor, and its physical and mechanical properties are not as good as large at room temperature. Most synthetic rubbers have very high requirements for the flame retardancy and arc ablation resistance of silic...

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Problems solved by technology

[0002] The main chain of silicone rubber is composed of silicon and oxygen atoms alternately, with organic groups on the silicon atoms. Silicone rubber is widely used in the field of ships due to its unique chemical stability, high and low temperature resistance, weather resistance, insulation and physiological inertia. The outstanding performance of silicone rubber is that it can be used in a wide temperature range and can be used for a long time at -60°C to 250°C. However, the mechanical properties of silicone rubber such as tensile strength and tear strength are poor, and its physical and mechanical properties are not as good as large at room temperature. Most synthetic rubbers have very high requirements for the flame retardancy and arc ablation resistance of silicone rubber materials used in high-voltage fields. However, silicone rubber molecular chains contain a large amount of C and H, so silicone rubber itself has Flammability, if it encounters an open flame, it will continue to burn. It is a flammable substance, which greatly limits its application range

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