Halogen-free flame retarding type thermoplastic elastomer and preparation method thereof

Abstract

The invention discloses a halogen-free flame retarding type thermoplastic elastomer and a preparation method thereof. The halogen-free flame retarding type thermoplastic elastomer is prepared throughthe following steps: selecting an EPDM / PP / SEPS (Ethylene-Propylene-Diene Monomer / Polypropylene / Styrene-Ethylene-Propylene-Styrene) high molecular composite system, a conductive carbon black / white carbon black / aramid pulp reinforcing conductive system and a compound flame-retarding system without halogen and antimony as main components of the thermoplastic elastomer; dynamically vulcanizing for 2 to 3min under the conditions that the rotary speed of an internal mixer is 40rpm and the temperature is 160 to 165 DEG C through a technological process of preparing EPDM master batch, carrying out silane modification treatment on a flame retardant, carrying out high-speed mixing and pre-plasticizing, carrying out combined dynamic vulcanization of the internal mixer and an extruder and the like; then dynamically vulcanizing through the extruder; dynamically vulcanizing for 5 to 7min under the conditions that the rotary speed of a screw rod is 30 to 50rpm and the temperature is 165 to 180 DEG C.The product prepared by the preparation method has good physical and mechanical performance, safety performance and environment-friendly performance, and meets the performance requirements of coal mine rubber products, automobile rubber products and rail transit rubber products on the thermoplastic elastomer are met.

Description

technical field [0001] The invention relates to the technical field of thermoplastic elastomers, in particular to a halogen-free flame-retardant thermoplastic elastomer and a preparation method thereof. Background technique [0002] Flame-retardant thermoplastic elastomers are important materials for coal mine rubber products, automotive rubber products, home appliance rubber products, rail transit rubber products and cables, and have a great market demand. At present, most of the flame-retardant thermoplastic elastomers used and produced in my country contain halogen and antimony. Either use halogen-containing subject materials, or add halogen- and antimony-containing flame retardants. Once ignited, a large amount of toxic and harmful gases will be produced. It affects people's health and life safety, pollutes the environment and corrodes mechanical equipment, causing serious secondary disasters. Some existing halogen-free flame-retardant thermoplastic elastomers, due to th...

AI Technical Summary

Problems solved by technology

At present, most of the flame-retardant thermoplastic elastomers used and produced in my country contain halogen and antimony. Either use halogen-containing subject materials, or add halogen- and antimony-containing flame retardants. Once ignited, a large amount of toxic and harmful gases will be produced. Affect people's health and life safety, pollute the environment and corrode mechanical equipment, causing serious secondary disasters

Some existing halogen-free flame-retardant thermoplastic elastomers, due to the addition of a large amount of inorganic flame retardants, greatly reduce the mechanical properties, and cannot be used to manufacture important products such as flame-retardant conveyor belts, cables, auto parts, and rail transit shock absorbers.