Technology for preparing high-performance reclaimed rubber by activating waste rubber powder

Abstract

The invention discloses a technology for preparing high-performance reclaimed rubber by activating waste rubber powder. The technology comprises the four steps of preparing powder, activating, desulfurizing and refining. The invention adopts a hydrogen peroxide / potassium ferrate compound oxidization system for oxidizing the waste rubber powder, a large quantity of active groups are exposed on the surface thereof, the desulfurizing reaction is performed under the synergistic effect of the ingredients prepared from the components, such as, an activating agent, rare earth tailing powder, rubber oil and benzaldehyde, the desulfurized rubber powder is refined so that the high-performance reclaimed rubber can be acquired. The performances, such as, tensile strength, elongation at break and mooney viscosity, of the reclaimed rubber are all better than those of the single or reused reclaimed rubber acquired in the manner of treating with a traditional activating agent, the content of harmful substances in the reclaimed rubber can be effectively reduced, the harmful odor is reduced and the environmental protection property of the production is higher.

Description

technical field [0001] The invention relates to the technical field of reclaimed rubber preparation, in particular to a process for preparing high-performance reclaimed rubber by activating waste rubber powder. Background technique [0002] my country is a big country in tire production and automobiles. With the rapid increase of family car ownership, a large number of waste tires are produced every year. How to effectively recycle these waste tires and prevent environmental pollution has very important practical significance and huge economic value. . At present, the more common waste tire recycling methods mainly include direct utilization of prototypes, incineration to generate heat, retreading of old tires, production of recycled rubber, and production of vulcanized rubber powder. Among them, recycled rubber has always been an important raw material for the world rubber industry and an important substitute for rubber. products, which can effectively alleviate the current...

AI Technical Summary

Problems solved by technology

[0003] Diphenyl disulfides containing phenolic hydroxyl groups such as 420, 480, and 510 are currently more commonly used regeneration activators, and their regeneration effect is better, but the composition is complex, and strong odors are produced during the production process, causing greater pollution.

"Research on the Structure and Properties of Recycled Waste Tire Rubber Powder Combined with Octadecylamine / Diphenylguanidine / DBD" published in Volume 36, Issue 6 of "Special Rubber Products" in 2015 When benzoguanidine / DBD is used as an activator, the regeneration effect is comparable to that of 480 / 510, but a relatively good regeneration effect can only be achieved when the amount of the composite activator is large, which undoubtedly increases the production cost. The performance of reclaimed rubber is closely related. On the basis of paying attention to environmental protection, the process and formula should be fully combined to obtain reclaimed rubber products with excellent comprehensive performance.