Waste tyre rubber powder plasticizing reaction modifying method

Abstract

The invention relates to a multipurpose utilization method of waste rubber tyre, in particular to a modification method of rubber powder under plastifying reaction of waste tyre, which removes the working procedures of kneading and refining and homogenizes the surface of the modified rubber powder particle. Forty to sixty mesh of waste tyre powder are taken as the basal quantity and the weight rate of the components is as following: forty to sixty mesh waste tyre powder 100 shares, plasticizer A-dipentene 2 to 4 shares, plasticizer B-oxydic tallol 6 to 10 shares, plasticizing addition agent tributyl-amine 0.5 to 1.5 shares, plasticizing addition agent cuprous chloride 0.3 to 0.6 share and dilution dispersant ethanol 3 to 5 shares. The forty to sixty mesh waste tyre powder in the above proportion is put into a high speed shear equipment and heated to 60 to 80 degree C. Then the plasticizing addition agent tributyl-amine, the solution of the plasticizing addition agent cuprous chloride and the dilution dispersant ethanol, the plasticizer A-dipentene and the plasticizer B-oxydic tallol are orderly added, the temperature is controlled between 70 to 130 degree C and the reaction time is controlled between 10 to 15 minutes. The plastifying reaction modified rubber powder can be obtained after cooling and discharging. The multipurpose utilization method of waste rubber tyre has the advantages of good compatibility with the new rubber and high physical and mechanical properties and can replaces the caoutchouc to make rubber product.

Description

Technical field: [0001] The invention relates to a method for comprehensive utilization of waste rubber. In particular, a plasticizing reaction modification method of waste tire rubber powder. Background technique: [0002] Scrap tires belong to a large category of industrial hazardous solid waste. If the waste tires are directly crushed without any modification and directly blended into new rubber to make vulcanized rubber, since the crushed rubber powder still maintains a cross-linked state, only the bonds on the surface are broken, so it is compatible with the new rubber. The compatibility is not good, and it is used in the production of rubber products. The structure of vulcanized rubber is uneven. Due to the existence of this inhomogeneity, when the vulcanized rubber is deformed by an external force, the interface between the rubber powder and the edge area of ​​the rubber material is prone to fracture, thereby affecting the physical and mechanical properties of the v...

AI Technical Summary

Problems solved by technology

[0004] At present, the modification of waste tire rubber powder crushed from waste tires is mainly used to produce recycled rubber. The production process generally needs to go through crushing-high temperature desulfurization-kneading-refining and other processes to modify waste tire rubber powder and produce During the process, due to the existence of desulfurization reaction, sulfur dioxide gas is produced, causing secondary pollution to the environment, and the physical and mechanical properties of the obtained reclaimed rubber are not good, especially the dynamic performance is not stable enough

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