Activated rubber particle, preparation method and application thereof

Abstract

The invention relates to an activated rubber particle, a preparation method and an application thereof, wherein the particle comprises the following components in parts by weight: 100 parts of car tire rubber powder, 10-40 parts of petroleum resin, 0.5-1 parts of activator and 0.5-3 parts of compatibilizer; above raw materials are extruded by a double-screw extruder and moulded to obtain a product that is the activated rubber particle. By adding the product to asphalt, shearing and stirring to disperse uniformly, property of the asphalt can be improved, and petroleum asphalt can be replaced partly. Compared with the prior art, the activated rubber particle not only ensures the waste car tire to improve the property of the modified asphalt, but also has low cost and simple using process, thereby realizing high efficient utilization of the waste resources.

Description

technical field [0001] The invention relates to the field of polymer rubber, in particular to an activated rubber particle, a preparation method thereof and an application in modified asphalt. Background technique [0002] Petroleum asphalt has the characteristics of being brittle at low temperature and easy to flow at high temperature. The addition of polymer modifiers can effectively improve the high and low temperature performance of asphalt. However, with the rise of crude oil prices and the sharp consumption of oil resources, the prices of common road modifiers such as SBS and PE have also risen sharply. In addition, the amount of waste tires in my country is increasing year by year, and a large amount of solid waste has brought huge environmental and social pressures. The use of waste tire rubber powder in asphalt modification can not only improve the temperature-sensitive performance of asphalt, increase the service life of the road surface, but also realize the rati...

AI Technical Summary

Problems solved by technology

The pyrolysis process of waste tires generally requires high temperature and high pressure, which not only consumes a lot of energy, but also wastes rubber resources seriously. At the same time, the operation is dangerous, so it is not the best way to recycle car tires

[0004] The main reason why car tire rubber powder has not been used in road construction on a large scale is that the car tire powder yield is low, the natural rubber content is low, it is difficult to interact with asphalt, and the modification effect on asphalt is poor; in addition, due to the high fiber content, the modified Unstable asphalt performance

Chinese patent CN1896143A provides a method for preparing a heat-storage-stable rubber powder-asphalt composition, wherein the rubber powder used is rubber powder after demetallization and defiberization; Chinese patent CN101870818 provides a durable rubber asphalt and its preparation method , the content of fiber and dust is required to be less than 1.5wt%. In the car tire industry, fibers generally play a role in increasing the strength of the sidewall, mainly including polyester fiber, nylon, rayon, viscose fiber, etc., which require good adhesion with rubber. Adhesion to ensure that there will be no peeling during use and affect the performance. Therefore, after the waste car tires are crushed at room temperature, most of the fibers are still attached to the surface of the rubber powder. Using the known fiber removal methods in the rubber powder industry will not only increase production and operation costs, but also cannot To achieve the desired effect, even if the fiber is separated, the fiber contains rubber powder which makes it difficult to use effectively

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