A kind of waste butyl rubber regeneration process and preparation method thereof

Abstract

The present invention relates to a regeneration process of waste butyl rubber. The components and contents used in the present invention are calculated in parts by weight: 100 parts of waste butyl rubber, 2-3 parts of vegetable oil, 2-3 parts of vegetable ester, high-efficiency 3-4 parts of water reducing agent, 2-3 parts of special effect activator and 4-6 parts of mineral oil, lignin of 0.1-0.2 parts by weight is also added in the present invention, and by controlling vegetable oil and vegetable ester and vegetable oil and The mass ratio of lignin makes the prepared butyl reclaimed rubber have good comprehensive properties. The present invention also provides a preparation method of waste butyl rubber regeneration process, which adopts low-temperature continuous mixing and refining to regenerate waste Butyl rubber, in the present invention, the process of continuous regeneration of waste butyl rubber by using internal mixer, twin-screw extruder, rubber filter and refining machine replaces the traditional reaction kettle under high temperature and high pressure, so as to realize the selectivity of chemical bonds Fracture, and then realize the low-temperature environmental protection regeneration of waste butyl rubber.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a waste butyl rubber regeneration process and a preparation method thereof. Background technique [0002] Butyl rubber is a copolymer of polybutene and a small amount of polyisoprene. A large number of large-scale arrangements of methyl groups in its molecular structure make butyl rubber have low air permeability, good thermal stability, good shock absorption performance, and ozone resistance. And other advantages, has been widely used in aerospace, transportation, mechanical equipment, construction engineering and daily life and other fields. In recent years, due to the rising price of the international oil market, the price of butyl rubber has also been rising. Although the price of butyl rubber products has risen, the overall price increase is far less than that of butyl rubber. Many companies have turned their attention to the best alternative to butyl rubber - butyl reclaime...

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Problems solved by technology

[0004] However, the current actual production adopts a high-temperature regeneration process. High temperature means high energy consumption, which will waste energy and cause environmental pollution. For example, Chinese patent application 2015107589702 discloses a method for producing environmentally friendly high-strength butyl reclaimed rubber at high temperature and normal pressure In the production process, the latter can control the temperature at 250-350°C for desulfurization. High temperature will generate high-temperature gas, which will affect the environment to a certain extent and is not conducive to environmental protection.

[0005] In the process of rubber regeneration production, waste rubber needs to be crushed. The smaller the crushed particle size, the more conducive to production and the more thorough the regeneration process. However, the more thoroughly the waste rubber is crushed, the more energy it consumes, which is not conducive to environmental protection, such as A production method of environmentally friendly butyl reclaimed rubber disclosed in Chinese patent application 2014100399882, in the production process, the waste butyl is crushed to a fineness below 0.4mm, and the smaller the particle size of the waste butyl in the production process, the greater the energy consumption. Big, not conducive to environmental protection

[0006] Chinese patent application 201510714323.1 relates to the technical field of low-temperature desulfurization to prepare reclaimed rubber, especially a method for preparing reclaimed rubber through low-temperature desulfurization of waste tires. After the waste tires are treated with ethanol, Tween 80 is added, and microwave radiation is used to make the waste tires The bond energy of the S-S bond and S-C bond in the tire rubber block has been reduced, and the activation energy of the colloid molecules and the S-S bond and S-C bond in the tire rubber block has been reduced. Low-temperature treatment greatly reduces the molecular activation energy of sulfur-containing components in waste tires and improves the efficiency of subsequent desulfurization. Combined with crushing, magnetic separation, and grinding steps, combined with ultrasonic catalytic treatment, and zinc oxide, acetic acid With the addition of , the removal rate of waste tires is higher, and the energy consumption in the desulfurization process is lower, so that the tensile strength and elongation at break of the reclaimed rubber are greatly improved, and the performance of the reclaimed rubber is also improved. However, the regeneration process is relatively complicated, the production efficiency is not high, and the cost of chemical microwave radiation treatment is relatively high, and it is difficult to realize the general experimental conditions

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