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Pelleting method of rubber tetramethylthiuram disulfide (TMTD)

A rubber vulcanization and accelerator technology, which is applied in the direction of mold extrusion granulation, special binder granulation, etc., can solve the problems of failure to achieve the purpose of granulation, long mixing time, insufficient cohesive force, etc., and achieve granulation High rate, no effect on product performance, low pulverization rate

Inactive Publication Date: 2011-08-17
KEMAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the granulation process, if too much binder is added or the selection is inappropriate, the granules will be too hard and it will be difficult to disperse. During the transportation and handling process, the particles re-dispersed, failing to achieve the purpose of granulation
[0004] In the process of application, TMTD granules are difficult to disperse due to the hardness of the granules, and the mixing time is long. Therefore, there is an urgent need for a granulation method for the rubber vulcanization accelerator TMTD that is easy to disperse and has a short mixing time.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Prepare the binder according to the attached table 1, add the prepared binder to the weight of the TMTD dry product at a ratio of 0.25% and the water mass content to 5%, and add the TMTD wet material to the stirring pot together, after fully stirring and mixing , put into the granulator, through the screw conveying, the wet material is extruded from the die plate hole of the machine head into uniform cylindrical particles with a diameter of 2±0.2mm, and after being dried by a belt dryer at 80°C, the wet product is passed through a vibrating screen. Separation of granules and powder, the granular products on the sieve are directly packaged as finished products, and the powder under the sieve is returned to the stirring pot for re-stirring and granulation. The one-time granulation rate of granulated products using this method is as high as 80%, and the average hardness is about 2.0N, which can fully meet the requirements of users, and the product performance is no differen...

Embodiment 2

[0028] Prepare the binder according to the attached table 2, add the prepared binder into the mixing pot with the weight of 1.5% of the weight of the TMTD dry product and the TMTD wet material with a water mass content of 25%, and stir and mix thoroughly , put it into the granulator, convey the wet material through the screw conveying, and extrude the uniform cylindrical granules with a diameter of 2±0.2mm from the die plate hole of the machine head. Separation of granules and powder, the granular products on the sieve are directly packaged as finished products, and the powder under the sieve is returned to the stirring pot for re-stirring and granulation. The one-time granulation rate of granulated products using this method is as high as 81.8%, and the average hardness is about 2.00N, which can fully meet the requirements of users, and the product performance is no different from that of TMTD powder.

[0029] Attached Table 2: Binder Composition

[0030] Element ...

example 3

[0032] Prepare the binder according to the attached table 3, add the prepared binder to the mixing pot with the TMTD wet material with a water mass content of 15% in the proportion of 3% of the weight of the TMTD dry product, and fully stir and mix , put it into the granulator, convey the wet material through the screw conveying, and extrude the uniform cylindrical granules with a diameter of 2±0.2mm from the die plate hole of the machine head. Separation of granules and powder, the granular products on the sieve are directly packaged as finished products, and the powder under the sieve is returned to the stirring pot for re-stirring and granulation. The one-time granulation rate of the granulated product using this method is as high as 83.3%, and the average hardness is about 2.0N, which can fully meet the user's requirements, and the product performance is no different from that of TMTD powder.

[0033] Attached Table 3: Binder Composition

[0034] Element

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Abstract

The invention discloses a pelleting method of a rubber tetramethylthiuram disulfide (TMTD), which comprises the following steps of: 1, adding a binding agent into a TMTD wet material, fully stirring, adding into a pelleting machine, extruding out uniform cylindrical particles; and 2, drying, separating through a screen, directly packaging the particles to prepare finished products. The binding agent is prepared from the following components in parts by mass: 80-110 parts of polyvinyl alcohol, 80-110 parts of povidone, 50-65 parts of vinylacetate, 40-50 parts of liquid paraffin, 1-5 parts of emulsifying agent, 0.5-1 part of polyoxyethylene, 1-4 parts of dispersing agent, 0.1-0.5 part of NaHCO3 and 150-180 parts of water. The invention has the advantages of saving manpower and material resources, reducing energy consumption and being high in once-granulating rate of the material; and the obtained TMTD has the advantages of high strength, low pulverization rate and no any influence on physicochemical properties and vulcanization reaction property of products, and accords with the environmental protection policy of China.

Description

technical field [0001] The invention relates to a granulation method of a rubber vulcanization accelerator-tetramethylthiuram vulcanization (TMTD) and a binder for granulation, belonging to the technical field of TMTD granulation production. Background technique [0002] Accelerator TMTD is an excellent second accelerator for thiazole accelerators, and can be used together with other accelerators as an accelerator for continuous vulcanization rubber. It is used as a vulcanization accelerator for natural rubber, synthetic rubber and latex, and can be used as a vulcanizing agent. This product is also an excellent fungicide. With the increasingly stringent requirements of environmental protection management and industrial use process, more and more powder products are replaced by granular products in the industry. Compared with powder products, granular products have the following advantages: no dust flying during use, and are user-friendly products; granular products have no ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J2/28B01J2/22C08K9/08C08K5/40C08L21/00
Inventor 孙风娟李桂平
Owner KEMAI CHEM
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