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High-performance regenerated rubber preparation method

A reclaimed rubber, high-performance technology, applied in the field of material forming and processing, can solve problems such as environmental hazards, unstable reclaimed rubber properties, and C-C bond breakage.

Active Publication Date: 2018-08-07
TIANTAI KUNRONG RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the recycling process of vulcanized rubber mostly adopts mechanochemical method, adding disulfides, such as diphenyl disulfide, dibenzyl disulfide, etc., to waste rubber. Sometimes, some C-C bonds will be broken, and the performance of the obtained reclaimed rubber is unstable. Therefore, how to recycle waste rubber stably and efficiently is the development direction of the rubber industry in the future.

Method used

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  • High-performance regenerated rubber preparation method

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preparation example Construction

[0018] The invention provides a method for preparing high-performance regenerated rubber, comprising the following steps: mixing 80-120 parts by weight of rubber powder, 6-10 parts by weight of softener, 2-5 parts by weight of activator, 1-3 parts by weight of antioxidant agent, 2-5 parts by weight modifier, and 6-10 parts by weight modified nano-montmorillonite are put into a stirring device equipped with a microwave device, stirred, and high-performance regenerated rubber is obtained after the reaction, and the softener is naphthene A mixture of oil and coumarone resin, the activator is modified stearic acid, and the modifier is zinc diacrylate.

[0019] The invention adopts the microwave stirring desulfurization method to reuse the regenerated rubber. At a certain temperature, the energy provided by the microwave can cut off the C-S bond without cutting off the main chain of the rubber to play the role of desulfurization. Due to the inability to accurately control the tempe...

Embodiment 1

[0039] Dissolve 10 parts by weight of stearic acid in 100ml of absolute ethanol, fully heat and stir for 10-30min, the heating temperature is 60°C, after the stearic acid is fully mixed, add a small amount of coupling agent KH-560 and 5 parts by weight of alumina powder, React for 40-60 minutes, filter and dry after the reaction is complete to obtain modified stearic acid.

[0040] Dissolve 1 part by weight of coupling agent in 100ml of absolute ethanol, heat and stir for 10-15 minutes at a temperature of 60°C, add 8 parts by weight of nano-montmorillonite, stir and react for 30-50 minutes, and filter and dry after the reaction is complete. Modified nano-montmorillonite.

[0041] Wash the waste rubber tires for 10-20 minutes, dry them after cleaning, grind the dried waste rubber tires on the machine, and collect the coarse tread rubber powder.

[0042] The tread coarse powder is subjected to magnetic separation to remove iron to obtain the screened tread coarse powder.

[00...

Embodiment 2

[0047] Dissolve 10 parts by weight of stearic acid in 100ml of absolute ethanol, fully heat and stir for 10-30min, the heating temperature is 60°C, after the stearic acid is fully mixed, add a small amount of coupling agent KH-560 and 5 parts by weight of alumina powder, React for 40-60 minutes, filter and dry after the reaction is complete to obtain modified stearic acid.

[0048] Dissolve 1 part by weight of coupling agent in 100ml of absolute ethanol, heat and stir for 10-15 minutes at a temperature of 60°C, add 8 parts by weight of nano-montmorillonite, stir and react for 30-50 minutes, and filter and dry after the reaction is complete. Modified nano-montmorillonite.

[0049] Wash the waste rubber tires for 10-20 minutes, dry them after cleaning, grind the dried waste rubber tires on the machine, and collect the coarse tread rubber powder.

[0050] The tread coarse powder is subjected to magnetic separation to remove iron to obtain the screened tread coarse powder.

[00...

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Abstract

The invention discloses a high-performance regenerated rubber preparation method which includes the steps: placing rubber powder, softeners, activators, antioxidants, modifiers and modified nano-montmorillonite into a stirring device with a microwave device; stirring the materials; performing reaction to obtain high-performance regenerated rubber. Friction force among rubber particles is increasedby adding the nano-montmorillonite, so that the materials are more sufficiently mixed. Besides, owing to coupling agents, the modified nano-montmorillonite can be more uniformly dispersed in a regenerated rubber packing layer. Owing to a special laminated structure of the nano-montmorillonite, the processing performance of rubber is greatly improved by the nano-montmorillonite uniformly dispersedin the rubber. Besides, as ZDA (zinc acrylate) has high hydroxyl-affinity in the vulcanization process of the rubber powder, a hydroxy-metal ion complex can be formed, dispersion of the modified nano-montmorillonite in the rubber is greatly enhanced, and the service performance of the vulcanized rubber is improved. Therefore, the prepared high-performance regenerated rubber has the advantages ofgood processing performance and high strength.

Description

technical field [0001] The invention relates to the technical field of material molding and processing, in particular to a preparation method of high-performance recycled rubber. Background technique [0002] The main source of waste rubber is the production of scrap tires, rubber hoses, tapes, shoe soles, industrial rubber miscellaneous parts, and materials from rubber factories. In recent years, about 1 million tons of waste rubber is produced in my country every year. These waste rubber products have not been fully utilized. In some places, waste rubber is used as fuel and mixed with coal, causing serious secondary pollution and waste of resources. The recycling of waste rubber not only expands the source of rubber raw materials, reduces production costs, but also protects the environment. [0003] At present, the recycling process of vulcanized rubber mostly adopts mechanochemical method, adding disulfides, such as diphenyl disulfide and dibenzyl disulfide, to waste rubb...

Claims

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Application Information

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IPC IPC(8): C08L17/00C08L91/00C08L45/02C08K9/06C08K3/34C08K5/098C08J11/26C08J11/16
CPCC08J11/16C08J11/26C08J2317/00C08K2201/011C08L17/00C08L2205/03C08L91/00C08L45/02C08K9/06C08K3/346C08K5/098Y02W30/62
Inventor 孔永胜孔荣坤杨登盛许琦
Owner TIANTAI KUNRONG RUBBER CO LTD