Self-extinguishing flame-retardant cable sheath material and preparation method thereof

Abstract

The invention discloses a self-extinguishing flame-retardant cable sheath material, comprising the following raw materials in parts by weight: 75-100 parts of dimethyl siloxane-methyl vinyl siloxane copolymer, 20-30 parts of fumed silica 15-20 parts of precipitated white carbon black, 11-15 parts of octamethylcyclotetrasiloxane, 4-10 parts of zinc oxide, 35-45 parts of talcum powder, 2-3 parts of hydroxyl silicone oil, 0.11-0.15 parts of selenium oxide, 1-1.8 parts of polysiloxane, 0.00024-0.0005 parts of platinum catalyst, 18-23 parts of aluminium hydroxide, 20-30 parts of magnesium hydrate, and 30-50 parts of calcium metasilicate. The invention also discloses a preparation method of the self-extinguishing flame-retardant cable sheath material. The self-extinguishing flame-retardant cable sheath material disclosed by the invention is free of pollution, good in high-temperature self-extinguishing effect, and simple in preparation process, and has certain strength and support ability after being sintered.

Description

technical field [0001] The invention relates to the technical field of cable sheath materials, in particular to a self-extinguishing flame-retardant cable sheath material and a preparation method thereof. Background technique [0002] With the improvement of social safety awareness, many application fields have clearly put forward the flame retardant performance requirements for the rubber materials used. Usually, halogen-containing rubber matrix is ​​used or halogen flame retardant is added to the rubber matrix to achieve excellent flame retardant effect. , although the effect is very good, it emits a large amount of poisonous and corrosive gas when burning, accompanied by a large amount of smoke. [0003] With the increasingly stringent environmental protection and recycling regulations and the continuous emergence of new sheath materials, traditional cable materials are facing huge challenges. The current technology mainly uses halogen-free low-smoke flame-retardant rubbe...

AI Technical Summary

Problems solved by technology

[0002] With the improvement of social safety awareness, many application fields have clearly put forward the flame retardant performance requirements for the rubber materials used. Usually, halogen-containing rubber matrix is ​​used or halogen flame retardant is added to the rubber matrix to achieve excellent flame retardant effect. , although the effect is very good, it emits a large amount of poisonous and corrosive gas when burning, accompanied by a large amount of smoke

[0003] With the increasingly stringent environmental protection and recycling regulations and the continuous emergence of new sheath materials, traditional cable materials are facing huge challenges. The current technology mainly uses halogen-free low-smoke flame-retardant rubber, mainly silicone rubber and ethylene-propylene rubber. And ethylene-vinyl acetate rubber, etc. These rubbers have flame retardancy and self-extinguishing properties in fire, and have a certain effect in fire, but after continuous high-temperature combustion, the burnt residue has no mechanical strength and turns into ashes, which will It will cause more dangerous secondary hazards. The protection of personal and property safety in fire is a major concern of people. How to prepare a cable sheath material that is pollution-free, has a good high-temperature self-extinguishing effect, and has a certain strength and support after burning has become a current demand. Technical issues resolved