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Waste rubber low-temperature efficient compound regeneration activating agent

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

Active Publication Date: 2018-07-31
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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  • Waste rubber low-temperature efficient compound regeneration activating agent
  • Waste rubber low-temperature efficient compound regeneration activating agent
  • Waste rubber low-temperature efficient compound regeneration activating agent

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 waste rubber low-temperature efficient compound regeneration activating agent. A main regeneration activating agent is N-tert-butylbenzothiazole-2-sulphenamide (NS), a subsidiary regeneration activating agent is stearic acid (SA), and a best weight proportion is 1:1. The compound regeneration activating agent has the advantages of being good in low-temperature coordination regeneration effect. A regeneration temperature is 110-130 DEG C, the time is 30 min, and Mooney viscosity (35-75) suitable for processing can be fast obtained. NS / SA and regeneration rubber thereofat the low temperature accord with the European Union REACH regulation. The mechanical property of the rubbers can be reserved after regeneration at the low temperature. The tensile strength can reach 15.24 Mpa, elongation at break can reach 415.6%, the obtained regeneration rubber is good in Mooney viscosity stability, Mooney rebound after 30 days is 0.5-10, and the regeneration rubber is in a powder state; the processing technology is simple, no waste gas or waste water is discharged, and the regeneration rubber is easy to automatically weigh and convey. Compared with a high-temperature high-pressure dynamic desulfurization technology, the processing technology can save energy by 50% through the low temperature.

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 Applications(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
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