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A low-temperature and high-efficiency composite regeneration activator for waste rubber

A regenerative activator and compound regeneration technology, applied in the field of regenerated rubber, can solve the problems of environmental pollution, stickiness, unfavorable automatic weighing and transportation, and poor performance of reclaimed rubber, and achieve good effect, easy automatic weighing and transportation, Good viscosity stability effect

Active Publication Date: 2021-03-26
XUZHOU COLLEGE OF INDAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of high-temperature regeneration of waste rubber polluting the environment and poor performance of reclaimed rubber, and to overcome the disadvantages of traditional regenerated activators that are viscous and unfavorable for automatic weighing and transportation, the present invention provides a reclaimed rubber with excellent performance, no pollution, and easy Automatic weighing and transportation, simple processing technology, energy-saving composite regeneration activator, it is made of primary and secondary regeneration activators according to the mass ratio, so that the regenerated rubber can retain the mechanical properties and high performance of rubber at low temperature Elastic properties, quickly and efficiently obtain Mooney viscosity suitable for processing with small rebound

Method used

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  • A low-temperature and high-efficiency composite regeneration activator for waste rubber
  • A low-temperature and high-efficiency composite regeneration activator for waste rubber
  • A low-temperature and high-efficiency composite regeneration activator for waste rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Put 50 parts by mass of the main regenerative activator NS into a heating agitator at a stirring speed of 100-200 rpm, and heat to 50-90°C while stirring; then add 50 parts by mass of stearic acid into the agitator Mix and stir at 50-90°C for 5 minutes; stop heating, continue stirring, and wait for the temperature of the material to drop to room temperature, and let it stand for 1-1.5 hours to obtain a powdery composite regeneration activator.

[0020] Add 2 parts by mass of the composite regeneration activator to 100 parts by mass of 26-mesh tire top rubber powder on an open mill and disperse evenly for 1 min to obtain activated rubber powder. Then add 20.0 parts by mass of tall oil to 102 parts by mass of activated rubber powder in the desulfurization tank, and then add 20 parts by mass of water to generate a regeneration pressure of 0.20MPa, desulfurize and regenerate at the regeneration pressure and regeneration temperature (130±5°C) 30min, then cool down to 70°C an...

Embodiment 2

[0022] Put 50 parts by mass of regenerated activator NS into a heating agitator at a stirring speed of 100-200 rpm, and heat to 50-90°C while stirring; then add 50 parts by mass of stearic acid into the agitator Mix and stir for 5 minutes at 50-90°C; stop heating, continue stirring, and wait for the temperature of the material to drop to room temperature, and let it stand for 1-1.5 hours to obtain a powdery composite regeneration activator.

[0023] Add 1.4 parts by mass of the composite regeneration activator to 100 parts by mass of 26-mesh tire top rubber powder on an open mill and uniformly disperse for 1 min to obtain activated rubber powder. Then add 20.0 parts by mass of tall oil to 102 parts by mass of activated rubber powder in the desulfurization tank, and then add 20 parts by mass of water to generate a regeneration pressure of 0.20MPa, desulfurize and regenerate at the regeneration pressure and regeneration temperature (130±5°C) 30min, then cool down to 70°C and dis...

Embodiment 3

[0025] Put 50 parts by mass of regenerated activator NS into a heating agitator at a stirring speed of 100-200 rpm, and heat to 50-90°C while stirring; then add 50 parts by mass of stearic acid into the agitator Mix and stir for 5 minutes at 50-90°C; stop heating, continue stirring, and wait for the temperature of the material to drop to room temperature, and let it stand for 1-1.5 hours to obtain a powdery composite regeneration activator.

[0026] Add 3.0 parts by mass of the composite regeneration activator to 100 parts by mass of 26-mesh tire top rubber powder on an open mill and uniformly disperse for 1 min to obtain activated rubber powder. Then add 20.0 parts by mass of tall oil to 102 parts by mass of activated rubber powder in the desulfurization tank, and then add 20 parts by mass of water to generate a regeneration pressure of 0.20MPa, desulfurize and regenerate at the regeneration pressure and regeneration temperature (130±5°C) 30min, then cool down to 70°C and dis...

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Abstract

The invention discloses a low-temperature and high-efficiency composite regeneration activator for waste rubber. The main regeneration activator is N-tert-butyl-2-benzothiazole sulfenamide (NS), and the secondary regeneration activator is stearic acid ( SA), the best mass ratio is 1:1. The composite regeneration activator has the following advantages: low temperature synergistic regeneration effect is good. The regeneration temperature is 110-130°C and the time is 30 minutes, and the Mooney viscosity (35-75) suitable for processing can be quickly obtained. NS / SA and its reclaimed rubber at low temperature comply with EU REACH regulations. Regeneration at low temperatures preserves the mechanical properties of the rubber. The tensile strength can reach 15.24MPa, and the elongation at break can reach 415.6%. The obtained regenerated rubber has good Mooney viscosity stability, and the 30-day Mooney rebound is 0.5-10. It is in powder form, with simple processing technology and no waste gas and wastewater discharge. Easy automatic weighing and conveying. Compared with the high temperature and high pressure dynamic desulfurization process, low temperature regeneration saves 50% of energy.

Description

technical field [0001] The invention relates to a low-temperature and high-efficiency composite regeneration activator for waste rubber, which belongs to the technical field of recycled rubber. Background technique [0002] At present, most of the various regenerative activators on the domestic market in China use the by-products of rubber additives as raw materials. The ingredients of the raw materials are complex. The production of traditional recycled rubber for rubber products uses dynamic desulfurization tanks to desulfurize at high temperature (200 to 300°C) for 4 hours, and changes the elastomer into a plastic body, which will easily lead to unstable product quality, low mechanical properties of recycled rubber, and large Mooney rebound. and other quality issues. This production process also produces a large amount of toxic waste gas and waste water, which seriously pollutes the environment and affects the health of the company, especially the health of the operating...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J11/26C08J11/28C08L17/00
CPCC08J11/26C08J11/28C08J2317/00C08J2319/00Y02W30/62
Inventor 王艳秋祝木伟张小萍丛后罗翁国文徐同萍靳玲孙鹏曹卫东
Owner XUZHOU COLLEGE OF INDAL TECH