High-performance flame-retardant silicone rubber self-adhesive tape and preparation process therefor

Abstract

The invention discloses a high-performance flame-retardant silicone rubber self-adhesive tape and a preparation process therefor. The high-performance flame-retardant silicone rubber self-adhesive tape comprises the following raw materials in parts by weight: 40-60 parts of silicone rubber crude rubber I, 10-30 parts of silicone rubber crude rubber II, 40-60 parts of white carbon black, 2-5 partsof structure controller, 3-5 parts of nano-scale flame retardant, 1-3 parts of heat resisting agent, 1-3 parts of tackifier, 0.01% to 0.5% of flame-retardant synergist, 0.01% to 0.3% of inhibitor and1.0% to 1.5% of vulcanizer, wherein the silicone rubber crude rubber I is methylvinyl silicone rubber and has the molecular weight of 450,000 to 600,000 and the vinyl content of 0.05% to 0.15%, and the silicone rubber crude rubber II is methylphenylvinyl silicone rubber and has the molecular weight of 350,000 to 400,000, the vinyl content of 0.1% to 0.2% and the phenyl content of 30% to 50%. The flame-retardant silicone rubber self-adhesive tape prepared by the preparation process has no need of adding a large amount of flame retardant and has the characteristics of good flame retardance, light specific weight, good fluidity, high tensile strength, good resilience, high self-adhesion, excellent electrical properties, organic solvent resistance and long shelf life and service life.

Description

technical field [0001] The invention relates to a high-performance flame-retardant silicone rubber self-adhesive tape and a preparation process thereof, belonging to the technical field of organic silicon polymer materials. Background technique [0002] Silicone rubber self-adhesive tape has incomparable advantages over other insulating tapes. It has the characteristics of temperature resistance range -60-260℃, outdoor aging life of more than 10 years, high electric breakdown, anti-corona, etc., but ordinary silicone rubber itself does not resist Once an open flame is ignited, it will continue to burn. At present, the silicone rubber flame retardants on the market are mainly metal hydroxides (mainly aluminum hydroxide), nitrogen phosphorus flame retardants, bromine flame retardants, etc.; bromine flame retardants Due to environmental protection issues, the use is restricted, and nitrogen phosphorus flame retardants and aluminum hydroxide flame retardants need to be added to ...

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Problems solved by technology

[0002] Silicone rubber self-adhesive tape has incomparable advantages over other insulating tapes. It has the characteristics of temperature resistance range -60-260℃, outdoor aging life of more than 10 years, high electric breakdown, anti-corona, etc., but ordinary silicone rubber itself does not resist Once an open flame is ignited, it will continue to burn. At present, the silicone rubber flame retardants on the market are mainly metal hydroxides (mainly aluminum hydroxide), nitrogen phosphorus flame retardants, bromine flame retardants, etc.; bromine flame retardants Due to environmental protection issues, the use is restricted, and nitrogen phosphorus flame retardants and aluminum hydroxide flame retardants need to be added to silicone rubber in a high proportion to achieve flame retardant V0 level. Silicone rubber self-adhesive tapes are filled with a large amount of aluminum hydroxide flame retardants Or nitrogen and phosphorus flame retardants will cause problems such as poor self-adhesiveness, no self-melting, short shelf life, poor rebound, etc. Outdoor dressings are easy to loosen and enter water, causing safety accidents

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