Method for preparing rubber floor by utilizing rubber reclaimed from old tires

Abstract

The invention discloses a method for preparing a rubber floor by utilizing rubber reclaimed from old tires. The method comprises the following steps: firstly carrying out normal temperature smashing rubber of the old tires under normal temperature condition, activating by utilizing potassium hydroxide, and then carrying out magnetic separation, so that rubber powder with larger specific surface area is obtained; then adding a desulfurization catalyst into the old tire rubber powder under microwave condition, carrying out high-speed shearing, and cutting off sulfur-sulfur bonds and sulfur-carbon bonds by utilizing microwave energy without destroying carbon-carbon bonds, so that the aim of regenerating is achieved; and finally compounding ingredients such as the old tire rubber powder, liquid polyurethane, nano kaolin and zinc oxide by virtue of a scientific and reasonable composition proportion, and achieving moulding effect under the actions of a polyurethane curing agent and a curingagent, so that performance of the rubber floor is improved. Compared with a common rubber floor production technology, discharge of odor and discharge of volatile matters are reduced, technological conditions of each step are strictly controlled, and the defect of delamination of the rubber floor due to high ash content and defects such as no wear resistance and low intensity are avoided.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a method for preparing a rubber floor from recycled rubber from old tires. Background technique [0002] With the rapid development of my country's automobile industry, the number of automobiles has increased year by year, and the demand for tires for automobile accessories has increased rapidly, so the output of waste tires has also increased year by year. On the one hand, my country is a country seriously short of rubber, with an annual consumption of about 5 million tons of rubber, of which 70% is dependent on imports; on the other hand, the output of waste tires is increasing sharply at a rate of 6%. waste tires, the quality is 12 million tons, and by 2020, the output of waste tires in my country will reach 20 million tons. The accumulation of waste tires not only easily breeds mosquitoes and causes environmental pollution, but also easily causes fires and poses hidden dangers...

AI Technical Summary

Problems solved by technology

Because waste tire rubber materials have high relative molecular weight, high viscosity, poor fluidity, and are difficult to process and reuse, they must be desulfurized first to break the three-dimensional structure before they can be used. Traditional high-temperature dynamic desulfurization is seriously polluted, and the regenerated rubber obtained is stinky. , the processing working conditions are very bad