Environment-friendly regenerated rubber and preparation method

Abstract

The invention relates to a regenerated rubber and a preparation method. The method comprises the following steps of: adding 20-40-mesh waste rubber powder into a piece of heating thermal insulation high-speed mixing equipment based on 100 weight parts; adding 0.5-4 parts of regeneration activating agent, 5-30 parts of regeneration swelling agent and 1-10 parts of other processing aids, and setting the temperature of a heating medium in the regeneration equipment to 180 DEG C; feeding the premix into the device through a first opening of a waste rubber net structure reestablishing device; after incompletely-sealed normal-pressure regeneration, discharging the material from a second opening part of the device; and performing water cooling on the regenerated material in a follow-up cooling device, wherein the whole regeneration time of the material is 30 minutes.

Description

technical field [0001] The invention relates to a reclaimed rubber and a preparation method. Background technique [0002] The regeneration of waste rubber refers to the use of physical, chemical or other methods to open the S-S bond and S-C bond in the cross-linked network to regain processability, and strive to reduce the breakage of the main chain to realize the reuse of rubber. The existing waste rubber recycling technologies are classified into physical methods, chemical methods and biological methods. [0003] The current production methods of recycled rubber mainly include high temperature dynamic desulfurization method, atmospheric pressure high temperature continuous method, extrusion method, chemical treatment method, microwave method, etc. The main method currently used in our country is the high temperature dynamic desulfurization method, and the most widely used method is the dynamic desulfurization method, which has the following disadvantages: [0004] ① Pot...

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Problems solved by technology

[0004] ① Potential safety hazard: high production pressure (2.5-5MPa); in order to pursue the output of a single machine, the tank body is getting bigger and bigger (2.5-7 cubic meters);

[0005] ② Low performance of regenerated rubber: due to long-term high temperature "desulfurization", thermal oxygen aging causes serious decline in the strength of regenerated rubber;

[0006] ③The quality of recycled rubber is unstable: the temperature and process are not easy to control, and local high temperature (above 200°C) can easily cause carbonization or coking on the surface of the rubber powder, resulting in unstable quality and performance;

[0007] ④Intermittent production, not continuous production;

[0008] ⑤ high energy consumption;

[0009] ⑥ Severe pollution, producing waste water, waste gas, and foul smell (coal tar)

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