A kind of flame-retardant and shock-absorbing EPDM vulcanizate and preparation method thereof

Abstract

The invention discloses flame-retardant shock-absorption EPDM vulcanized rubber. The flame-retardant shock-absorption EPDM vulcanized rubber is mainly prepared from the following raw materials in parts by weight: 100 parts of ethylene propylene diene monomer, 5-40 parts of an organophosphorus ester flame retardant, 20-60 parts of an inorganic flame retardant, 5-40 parts of a smoke suppression agent, 25-45 parts of a reinforcing filling agent, 6-12 parts of an active agent, 0.3-5 parts of a vulcanizing agent and 1.5-4 parts of an accelerant. A preparation method of the flame-retardant shock-absorption EPDM vulcanized rubber comprises the following steps: mixing the ethylene propylene diene monomer, the active agent and an anti-ageing agent; adding the reinforcing filling agent, the inorganic flame retardant, the organophosphorus ester flame retardant and the smoke suppression agent, and mixing to obtain a first-stage rubber compound; mixing the first-stage rubber compound with the vulcanizing agent and the accelerant, and carrying out mill run or / and triangle package hitting, so as to prepare a second-stage rubber compound; and finally vulcanizing the second-stage rubber compound, so as to obtain the flame-retardant shock-absorption EPDM vulcanized rubber. The flame-retardant shock-absorption EPDM vulcanized rubber has good flame retardance and smoke suppression effects and good physical and mechanical properties.

Description

technical field [0001] The invention relates to the field of rubber, in particular to a flame-retardant and shock-absorbing EPDM vulcanized rubber with low smoke and low toxicity and a preparation method thereof. Background technique [0002] With the rapid development of high-speed railways, people's requirements for safety are getting higher and higher, and the railway industry's requirements for train fire protection are becoming more and more stringent. And EPDM (hereinafter referred to as EPDM) is as the commonly used material in the railway industry, although it has good shock absorption and noise reduction performance, it is flammable, and there is a fire hazard unavoidably in the use process. Therefore, to improve The flame retardancy of EPDM products is imperative. [0003] At present, EPDM materials are mainly improved by adding halogen-containing flame retardants and filling a large amount of inorganic flame retardants to improve their flame-retardant properties....

AI Technical Summary

Problems solved by technology

And EPDM (hereinafter referred to as EPDM) is as the commonly used material in the railway industry, although it has good shock absorption and noise reduction performance, it is flammable, and there is a fire hazard unavoidably in the use process. Therefore, to improve The flame retardant performance of EPDM products is imperative

[0003] At present, EPDM materials are mainly improved by adding halogen-containing flame retardants and filling a large amount of inorganic flame retardants to improve their flame-retardant properties. The smoke and toxic and corrosive gases will easily lead to corrosion of circuit system switches and other metal objects and pollution to the environment. It will also cause certain harm to the human respiratory tract and other organs, and even cause people to threaten their lives due to suffocation. ; while inorganic flame retardants are mainly inorganic metal hydroxides, which have low flame retardant efficiency and need to be added in large quantities to achieve good flame retardant and smoke suppression effects, but a large amount of inorganic flame retardants will affect the tensile strength of EPDM. , Compression set, springback and heat generation will have adverse effects, which will affect the dynamic performance and fatigue performance of vibration-damping EPDM products

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