A kind of waste rubber regeneration process and preparation method thereof

Abstract

The invention relates to a waste rubber regeneration process and a preparation method thereof. The components and contents used in the invention are, in parts by weight, 100 parts of waste rubber, 2-3 parts of vegetable oil, 2-3 parts of vegetable ester, and decoupling. 3-4 parts of agent, 2-3 parts of special activator and 4-6 parts of accelerator, lignin with a weight fraction of 0.1-0.2, and by controlling the mass ratio of vegetable oil to vegetable fat and vegetable oil to lignin, the prepared The reclaimed rubber has excellent physical and mechanical properties and processing properties, and the present invention also provides a method for preparing waste rubber regeneration. The reaction kettle under high temperature and high pressure adopts the regeneration process technology combining mechanical delinking and chemical depolymerization to selectively break cross-linking bonds with weaker bond energy, avoid the breakage of the main chain of rubber molecules, and realize the strong strength of waste rubber under low temperature conditions. Environmentally friendly and efficient regeneration.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a waste rubber regeneration process and a preparation method thereof. Background technique [0002] my country is a big consumer of rubber resources, but also a country that is very scarce in rubber resources. China's consumption of rubber resources is about 24% of the world's rubber consumption, while my country's self-produced rubber resources are less than 10%. The production of reclaimed rubber can make up for the shortage of rubber resources and realize the high-value recycling of rubber resources. At present, the biggest problem facing the reclaimed rubber industry is high energy consumption, low output, and serious secondary pollution. In recent years, although the innovation of regeneration technology has been continuously carried out, it has not been able to get rid of the current production situation of high consumption and low energy, and the production of waste gas, w...

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Problems solved by technology

The method of the present invention has the advantages of high efficiency, energy saving, and no pollution, but it has high requirements on the speed of internal mixer and other processes, and the regeneration quality needs to be improved

[0003] In the process of rubber regeneration production, waste rubber needs to be crushed. For the existing regeneration process, the smaller the crushing particle size, the more conducive to production and the more thorough the regeneration process. However, the more thoroughly the waste rubber is crushed, the higher the energy consumption and the more It is not conducive to environmental protection. For example, in the production method of an environmentally friendly butyl reclaimed rubber disclosed in Chinese patent application 2014100399882, the waste butyl is crushed to a fineness below 0.4mm during the production process.

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 The addition of the waste tire makes the removal rate of waste tires 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, but the process of this method is relatively complicated. The cost of microwave radiation treatment is high, and the general experimental conditions are difficult to achieve

However, it does not disclose the technical scheme of using a gear pump to filter, thereby increasing the uniformity of the rubber material and the effect of plasticizing and decoupling, nor does it disclose that it contains a variety of active functional groups, thereby promoting the rubber macromolecular chains and the rubber molecular chains and sulfur in the regeneration process. Regenerated delinker formulation for bond decrosslinking

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