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Waste vulcanized butyl rubber desulfurization regeneration and preparation method and equipment thereof

A technology of regeneration equipment and vulcanization, which is applied in the chemical industry, can solve the problems of carbonization, complexity, and impact on product quality of rubber powder, and achieve the effect of overcoming carbonization, uniform desulfurization, and reasonable production process design.

Inactive Publication Date: 2010-06-16
沧州市元亨橡胶有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the existing technology and solve the problem that the existing waste vulcanized butyl rubber desulfurization an

Method used

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  • Waste vulcanized butyl rubber desulfurization regeneration and preparation method and equipment thereof
  • Waste vulcanized butyl rubber desulfurization regeneration and preparation method and equipment thereof
  • Waste vulcanized butyl rubber desulfurization regeneration and preparation method and equipment thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Choose two twin-screw extruders, the front twin-screw extruder is a twin-screw extruder with a screw diameter of 60mm, a screw length-to-diameter ratio of L / D=30, a compression ratio of 3, and a speed of 100 to 400 rpm. The rear twin-screw extruder is a twin-screw extruder with a screw diameter of 50 mm, a screw length-to-diameter ratio of L / D=30, a compression ratio of 3, and a rotation speed of 100 to 400 rpm. After the outlet head is connected to the feed port of the twin-screw extruder, the two twin-screw extruders are connected in series to form a twin-screw extrusion line (see attached figure 1 ).

[0025] The random sampling test indicators of waste vulcanized butyl rubber sheets or rings (car inner tubes of waste butyl rubber) to be recycled are: Mooney viscosity ML[(1+4)100°C] 67.25; tensile strength 10.01Mpa; Elongation 500.05%.

[0026] Preparation method: Put the waste vulcanized butyl rubber sheet into the front twin-screw extruder for forward and reverse...

Embodiment 2

[0028] The selected front screw extruder is a twin-screw extruder with a screw diameter of 60mm, a screw length-to-diameter ratio of L / D=30, a compression ratio of 3, and a rotation speed of 100-400 rpm. The rear screw extruder is a twin-screw extruder with a screw diameter of 50mm, the length-to-diameter ratio of the screw is L / D=30, the compression ratio is 3, and the speed is 100-400 rpm twin-screw extruder. The front twin-screw extruders are connected in series to form a twin-screw extruder.

[0029] The waste vulcanized butyl rubber (capsules of waste butyl rubber) to be regenerated is randomly sampled and tested as follows: Mooney viscosity ML[(1+4)100°C] 56.2; tensile strength 9.7Mpa; elongation at break 500.4% .

[0030] Preparation method: Add waste vulcanized butyl rubber into the front twin-screw extruder for forward and reverse multi-stage screw mixed extrusion. After the temperature of the material reaches 210° and the pressure is 3.0Mpa in the mechanism, the mate...

Embodiment 3

[0032] See attached figure 1, the preceding twin-screw extruder that the present invention selects is screw diameter 60mm, and screw rod length-diameter ratio L / D=30, and compression ratio is 3, and rotating speed is the twin-screw extruding mechanism of 100~400 revs / min, and the rear is three-screw extruder The variable-frequency speed-regulating three-screw extruder is meshed and connected in the shape of an inverted "pin", the diameter of the screw is 60mm, and the two extruders are connected in series to form a screw extrusion line.

[0033] The random sampling test indicators of waste vulcanized butyl rubber sheets (waste butyl rubber inner tubes) to be recycled are: Mooney viscosity ML[(1+4)100°C] 66.75; tensile strength 9.85Mpa; elongation at break 489.4% .

[0034] Preparation method: Put the waste vulcanized butyl rubber sheet into the front twin-screw extruder for forward and reverse multi-stage screw mixed extrusion. After the material temperature reaches 200° and ...

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Abstract

The invention provides a waste vulcanized butyl rubber desulfurization regeneration and preparation method and equipment thereof, belonging to the technical field of chemical industry and aiming at solving the problems of complex production process equipment, rubber powder carbonization and influenced product quality in the current waste vulcanized butyl rubber desulfurization regeneration and preparation method. The invention uses two screw extruders which are connected in series to form a screw extrusion on line, and the preparation method is as follows: adding waste vulcanized butyl rubber powder in a first screw extruder for multistage screw mixed extrusion propelling forwards and backwards; entering a second screw extruder for secondary multistage screw mixed extrusion propelling forwards and backwards after extruding from a handpiece when temperature of the inside of the extruder and the materials reaches 180-210 DEG C, and the pressure is 2.0-3.0 MPa; and discharging to prepare the desulfurated-regenerated butyl rubber when the temperature of the inside of the extruders and the materials reaches 220-250 DEG C and the pressure reaches 3.3-5.0MPa. The preparation method in the invention has simple equipment and is suitable for preparing desulfurated-regenerated butyl rubber.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to a preparation method and equipment for the desulfurization and regeneration of waste vulcanized butyl rubber. Background technique [0002] Butyl rubber (IIR) is a synthetic rubber made by copolymerization of isobutylene and isoprene. It has good air tightness, low air permeability, heat resistance, aging resistance, acid resistance, alkali resistance and polarity resistance. Solvent and other characteristics, widely used in the manufacture of tires, capsules, medical bottle stoppers, etc. With the wide application of butyl rubber products, a large amount of waste vulcanized butyl rubber is also produced, so it is very important to recycle it to prepare butyl regenerated rubber. In the known technology, the existing desulfurization and regeneration preparation methods of waste vulcanized butyl rubber mainly include chemical regeneration, physical regeneration, and biologi...

Claims

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Application Information

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IPC IPC(8): C08J11/10C08L23/22B29C47/92B29C47/60B29C48/40B29C48/92
CPCB29C48/92B29C2948/92704B29C48/385B29C48/40B29C48/655B29C2948/92514B29C2948/92895B29C2948/92904B29C48/43
Inventor 魏秀茹孙玉林马志国王国宝梁若萍
Owner 沧州市元亨橡胶有限责任公司
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