Halogen-free flame retardant silicone rubber composition

Abstract

The invention discloses a halogen-free flame retardant silicone rubber composition, comprising the ingredients in parts by weight as follows: 100 parts of unvulcanized methylphenylvinyl silicone rubber, 10-20 parts of halogen-free flame retardant, 1-4 parts of calcium carbonate, 5-7 parts of diatomite, 1-5 parts of hydroxyl silicone oil, 0.5-4 parts of vulcanization crosslinking agent and 20-30 parts of fumed silica, wherein the unvulcanized methylphenylvinyl silicone rubber is taken as a main material and an organic phosphates additive is added to prepare the halogen-free flame retardant silicone rubber composition. The obtained silicone rubber composition is good in flame retardance; the additives used by the composition disclosed by the invention do not influence processability and physical mechanical performance of the silicone rubber; and the silicone rubber composition disclosed by the invention does not generate toxic and harmful gas and smoke when being burned and does not cause environment pollution.

Description

[0001] technical field [0002] The invention relates to the technical field of silicone rubber, in particular to a halogen-free flame-retardant silicone rubber composition. Background technique [0003] As a polymer material with both inorganic and organic properties, silicone rubber has excellent high temperature resistance, weather resistance, aging resistance, low compression set and electrical insulation properties compared with general organic rubber. Thermoplastic elastomers prepared with silicone rubber as the main component have more excellent properties than ordinary thermoplastic elastomers. Some flame-retardant silicone rubbers in the prior art are added with halogen-containing flame retardants, which produce a large amount of toxic gases and smoke during the flame-retardant process, causing pollution to the environment. When aluminum hydroxide and magnesium hydroxide are used as flame retardants, it is necessary to add Only a large amount can achieve a good fl...

AI Technical Summary

Problems solved by technology

Some flame-retardant silicone rubbers in the prior art are added with halogen-containing flame retardants, which produce a large amount of toxic gases and smoke during the flame-retardant process, causing pollution to the environment. When aluminum hydroxide and magnesium hydroxide are used as flame retardants, it is necessary to add Only a large amount can achieve a good flame retardant effect, which will affect the processing performance and physical and mechanical properties of silicone rubber