Method for continuously preparing liquid reclaimed rubber by aid of screw extruder

A technology of screw extrusion and reclaimed rubber, which is applied in the field of desulfurization and regeneration of waste rubber, can solve the problems of discontinuity and large pollution, and achieve the effects of reducing smoke pollution, reducing energy consumption, and significant economic benefits

Active Publication Date: 2012-07-25
宿迁绿金人橡塑机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the disadvantages of large pollution and discontinuity in the prior art, provide a metho...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1: Use 100 parts of waste tire tread rubber powder with a particle size of 0.1 mm, add 20 parts of pine tar, 4 parts of rosin, 6 parts of dipentene, and 0.5 part of disulfide alkylphenol (activator 420) for regeneration agent, mixed and stirred in the mixer at 60°C for 30min, then stood at 80°C for 6h, and then fed it into the co-rotating twin-screw extruder (D=30mm, L / D=52 / 1, 6 pieces Heating section): the screw speed is 100r / min. The temperature of each heating section is set to 120°C, 150°C, 200°C, 250°C, 150°C, 100°C respectively, and the maximum pressure reaches 4.5MPa. After reacting for 12 minutes, extrude through the die of a screw extruder to obtain liquid reclaimed rubber. Its properties as asphalt are as follows: softening point 50.3°C, penetration (0.1mm) 64.3, ductility at 15°C > 100cm. After being used with 50 parts of base asphalt, the properties are as follows: softening point 49.6°C, penetration (0.1mm) 66.9, ductility at 15°C > 100cm.

[001...

Embodiment 2

[0018] Embodiment 2: 100 parts of waste tire tread rubber powder with a particle size of 1 mm are used, 6 parts of pine tar, 4 parts of naphthenic oil, 0.5 part of phenyl mercaptan, and 0.5 part of n-butylamine are used as regenerants, and 100 parts in a mixer After mixing and stirring for 10 min at ℃, place it at 50 ℃ for 36 h. Then it is added into a co-rotating twin-screw extruder (D=30mm, L / D=52 / 1, six heating sections) by a feeding device: the screw speed is 150r / min, so that the temperature of each heating section is respectively Set to 120°C, 180°C, 230°C, 280°C, 150°C, 100°C, change the internal thread composition of the screw and add right-handed thread elements to make the maximum pressure reach 7.5Mpa. After reacting for 5 minutes, extrude through the die of the screw extruder to obtain liquid reclaimed rubber. Its properties as asphalt are as follows: softening point 50.7°C, penetration (0.1mm) 61.9, ductility at 15°C > 100cm. After being used with 50 parts of ba...

Embodiment 3

[0020] Example 3: Use 100 parts of waste ethylene-propylene rubber with a particle size of 1 mm, add 15 parts of paraffin oil, 5 parts of paraffin oil, and 1 part of alkylphenol disulfide as a regenerant, mix and stir in a mixer at 150 ° C for 15 minutes, and then place it at 120 ° C Let stand for 36h. It was then fed into a co-rotating twin-screw extruder (D=30 mm, L / D=52 / 1, six heating zones) through a feeding device. The screw speed is 120r / min. The temperature of each heating section is set to 140°C, 200°C, 280°C, 380°C, 200°C, 150°C respectively, and the maximum pressure reaches 6.0MPa. After reacting for 10 minutes, the liquid ethylene-propylene reclaimed rubber can be obtained after extruding from the die of the screw extruder. It is used together with 20 parts of pure ethylene-propylene rubber, and the properties are as follows: tensile strength 12.8Mpa, elongation at break 350%, aging in hot air (80°C×168h) tensile strength change rate -25%, elongation at break Rat...

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Abstract

The invention relates to a method for continuously preparing liquid reclaimed rubber by the aid of a screw extruder, which belongs to the field of waste rubber recycling. The method is characterized in that a cross-linked network of pretreated waste rubber powder is crushed to obtain the liquid reclaimed rubber under the combined action of temperature, pressure, shearing and desulfurizer in the screw extruder by means of a physical and chemical linkage method and by the aid of the screw extruder. The method is simple in technical process and has the advantages of high desulfurization and depolymerization degree, energy conservation, environmental protection and continuity. The obtained liquid reclaimed rubber can be used with asphalt or replaces the asphalt for paving, and can be used with pure rubber to manufacture waterproof anticorrosion materials and the like.

Description

Technical field: [0001] The invention relates to a new method for desulfurization and regeneration of waste rubber, in particular to a new method and process for preparing liquid regenerated rubber through continuous desulfurization and depolymerization of a screw extruder, belonging to the field of waste rubber recycling. Background technique [0002] The comprehensive utilization of waste rubber is the core of the circular economy of the rubber industry, which is of great significance for saving fossil resources and protecting the environment. According to statistics, in 2009 my country produced 233 million waste tires with a weight of about 8.6 million tons. Accelerating the comprehensive utilization of waste tires will help reduce my country's dependence on foreign rubber resources, prevent and control environmental pollution, and have huge social and economic benefits. [0003] Rubber desulfurization and regeneration is the process of using physical, chemical or biolog...

Claims

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Application Information

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IPC IPC(8): B29C47/92B29C47/38C08L17/00B29C48/92B29C48/395
CPCB29C48/55B29C48/92B29C2948/92514B29C2948/92561B29C2948/92704B29C2948/92895
Inventor 张立群史金炜任冬云王尧于强王士军
Owner 宿迁绿金人橡塑机械有限公司
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