Regenerative vulcanized butadiene nitrile rubber and preparation thereof

Abstract

The invention discloses a method for preparing renewable vulcanized nitrile rubber; waste vulcanized nitrile rubbers are sorted, cleaned and classified, then cut and crushed by an open-type rubber mixing or open-type fluted roll rubber breaking machine; the particle size of the crushed rubber compounds are 4-20-mesh granules or small strip blocks; the crushed rubber compounds are put into a self-heating mixer and stirred, then desulfurizers are added, followed cocatalysts, promoters and softeners; the mixture is stirred constantly, then after solid tackifiers, plasticizers, active modifiers are added into the mixture, the reaction is terminated and the materials are discharged and cooled; then, the rubber compounds terminated by reactive plasticization are discharged into the cylinder of a cooling machine for cooling; after being discharged from the cylinder, the materials are continuously cooled and stacked to avoid natural burning; the plasticized rubber compounds are mixed with rubber compounds of masterbatches and added into an open-type rubber refiner for production; then finished products are obtained through kneading, refining, mixing, plasticating, defilming and packaging. The method of the invention has the advantages of low energy consumption, energy saving effect, no pollution, good physical properties, as well as simple and safe process, which enables production in normal temperature and pressure and uses waste to treat waste to achieve comprehensive utilization.

Description

technical field [0001] The invention relates to a processing method of waste rubber, in particular to a regenerated vulcanized nitrile rubber and a preparation method thereof. technical background [0002] my country is a big rubber consumption country, and the waste rubber produced by waste tires and other rubber products is about 5 million tons per year. If the waste rubber is not handled properly, it will cause great pressure on the improvement of the ecological environment, and even increase the environmental pollution. Since waste tires have strong heat resistance, mechanical resistance, and degradation resistance, they will not be eliminated naturally for decades, which will occupy a large amount of land, and are prone to breeding mosquitoes, infectious diseases, and fire hazards. [0003] At the same time, my country is a country with a relative shortage of natural rubber resources. Almost 60% of the annual rubber consumption needs to be imported. Especially since th...

AI Technical Summary

Problems solved by technology

However, the ideal regeneration effect cannot be achieved for the waste tire fluidized rubber with synthetic rubber as the main body, especially the highly saturated butyl rubber and ethylene-propylene rubber used in the tire process, which bring difficulties to vulcanization for traditional regeneration methods. As a result, the quality of reclaimed rubber produced by traditional methods is poor and its use is limited

[0020] The production and popularization of radial tires with steel wire as the skeleton material, and the crushing of waste radial tires have brought difficulties to the traditional recycling industry (high crushing costs). Therefore, traditional reclaimed rubber cannot be used in the production of radial tires, which makes the reclaimed rubber produced by traditional methods lose the market for this part of the tire manufacturing industry.

In addition, traditional regeneration methods have the disadvantages of high energy consumption and serious pollution