Environment-friendly flame-retardant ethylene-propylene-diene monomer rubber vibration-absorptive material and preparation method thereof

Abstract

The invention discloses an environment-friendly flame-retardant ethylene-propylene-diene monomer rubber vibration-absorptive material. The environment-friendly flame-retardant ethylene-propylene-dienemonomer rubber vibration-absorptive material is prepared from the following components in parts by weight: 150 to 220 parts of ethylene-propylene diene copolymer, 10 to 20 parts of carbon black, 10 to 15 parts of a red phosphorus flame retardant RL-EP, 70 to 80 parts of modified magnesium hydroxide powder, 120 to 180 parts of aluminum hydroxide, 10 to 15 parts of white carbon black, 30 to 40 parts of naphthenic oil, 3 to 5 parts of an antiager RD, 8 to 10 parts of zinc oxide, 1.5 to 2.5 parts of zinc stearate, 1 to 2 parts of an active agent PEG-4000, 4 to 5 parts of magnesium oxide, 2 to 3 parts of a release agent L-24, 1 to 2 parts of a release agent KL-3Q, 1 to 2 parts of a vulcanizer S-80 and 3 to 5 parts of an accelerant.

Description

technical field [0001] The invention relates to the technical field of flame-retardant and shock-absorbing rubber, in particular to an environment-friendly flame-retardant EPDM rubber shock-absorbing material and a preparation method thereof. Background technique [0002] With the rapid development of industry, vibration and noise have become serious problems in various fields. It affects product quality, reduces operating accuracy, shortens product life, endangers product safety, pollutes the environment and affects personal health. In order to prevent the noise and vibration produced by automobiles, home appliances and other vehicles and industrial machinery, in addition to reducing or eliminating the vibration of the vibration source, it is more practical to develop and utilize various shock-absorbing products, among which rubber shock-absorbing products are particularly important. made of. The elasticity of rubber has the characteristics of both elasticity and viscosity...

AI Technical Summary

Problems solved by technology

[0003] Due to its excellent aging resistance and easy filling, EPDM rubber can be vulcanized by peroxide to provide better compression resistance. It is gradually used in shock-absorbing products, but EPDM rubber has poor damping properties and is too The oxide vulcanization system reduces the deformation ability of the rubber, and the fatigue resistance of the rubber material decreases during the vibration process, which cannot meet the performance requirements. At the same time, because the shock-absorbing rubber material absorbs excess vibration, it is more likely to heat up and has a potential danger of burning.

At present, red phosphorus is mostly used as a flame retardant for vibration-damping rubber compounds. Its advantage is that it does not damage the vibration-damping properties and heat generation durability of vibration-damping rubber, and can also suppress the generation of toxic gases. However, its flame-retardant effect is still Not as good as halogen flame retardants, in order to obtain a high flame retardant effect, it must be used in large quantities, which inevitably reduces the performance of the rubber compound and further reduces its damping performance

Some researchers use the red phosphorus / magnesium hydroxide compound as a high-efficiency flame retardant to improve the flame retardancy of the rubber system. A small amount of red phosphorus can be used with a relatively large amount of magnesium hydroxide to achieve a good flame retardant effect. However, the molecular binding between magnesium hydroxide and EPDM rubber is poor, and it is easy to precipitate and fail.

"Synthetic Rubber Industry" published in 2004, Volume 27, Issue 6, "The Effect of Magnesium Hydroxide Particle Size on the Mechanical Properties and Flame Retardant Properties of Filled EPDM Composite Materials" shows that the smaller the particle size of magnesium hydroxide The smaller the reinforcement and the better the flame retardancy, and the surface modification treatment of magnesium hydroxide with silane coupling agent, although the compatibility with EPDM rubber has been improved, but it is also caused by the introduction of organic matter. When the material burns, the heat transfer is easier, the ignition time is shortened, and the flame retardancy is affected

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