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Method for granulating rubber vulcanization accelerator TETD (Tetraethylthiuram Disulfide)

A technology of rubber vulcanization and accelerator, applied in the direction of special adhesive granulation, etc., can solve the problems of failure to achieve the purpose of granulation, insufficient cohesion, long mixing time, etc., and achieves low pulverization rate, good effect, No effect on product performance

Inactive Publication Date: 2011-05-18
KEMAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 application process of TETD particles, due to the hardness of the particles, there are problems such as difficult dispersion and long mixing time. Therefore, there is an urgent need for a promoter that is easy to disperse, has a high granulation rate, and has strong compatibility with various rubbers. The granulation method of agent TETD

Method used

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  • Method for granulating rubber vulcanization accelerator TETD (Tetraethylthiuram Disulfide)

Examples

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Effect test

Embodiment 1

[0021] The granulation method of rubber vulcanization accelerator TETD comprises the following steps:

[0022] Prepare the binder according to the attached table 1, add the prepared binder into the mixing pot together with the TETD wet material with a water mass content of 5% in the proportion of 0.5% by weight of the TETD dry product, and stir and mix thoroughly , put it into the granulator, and convey the wet material through the screw conveying to 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 80%, and the average hardness is about 2.00N, which can fully meet the requirements of users, and the product performance is no ...

Embodiment 2

[0027] The granulation method of rubber vulcanization accelerator TETD comprises the following steps:

[0028] Prepare the binder according to the attached table 2, add the prepared binder to the mixing pot with the weight of 1% of the TETD dry product and the TETD wet material with a water mass content of 25%, and after fully stirring and mixing, Put it into the granulator, convey the wet material through the screw to extrude uniform cylindrical particles with a diameter of 2±0.2mm from the die plate hole of the machine head, and separate it with a vibrating screen after drying in a belt dryer at 45°C Granules and powders, 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 81.7%, and the average hardness is about 2.00N, which can fully meet the user's requirements, an...

Embodiment 3

[0033] The granulation method of rubber vulcanization accelerator TETD comprises the following steps:

[0034] Prepare the binder according to the attached table 3, add the prepared binder to the mixing pot with the weight of 3% of the TETD dry product and the TETD wet material with a water mass content of 20%, after fully stirring and mixing, Put it into the granulator, convey the wet material through the screw to extrude uniform cylindrical particles with a diameter of 2±0.2mm from the die plate hole of the machine head, and separate it with a vibrating screen after drying in a belt dryer at 50°C Granules and powders, 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 83.5%, and the average hardness is about 2.00N, which can fully meet the requirements of users, and the...

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Abstract

The invention discloses a method for granulating a rubber vulcanization accelerator TETD (Tetraethylthiuram Disulfide), comprising the following steps of: (1) adding a cementing agent into a TETD wet material, sufficiently stirring, and adding into a granulator to ensure that the material is squeezed out from a machine head template hole to form even cylindrical granules through screw conveying; and (2) drying, separating by utilizing screen cloth and directly packaging the granular product to obtain an end product, wherein the TETD is an abbreviation of tetraethylthiuram disulfide and the cementing agent is made from the following constituents in parts by mass: 80-100 parts of polyvinyl alcohol, 80-100 parts of povidone, 70-90 parts of vinyl acetate, 40-50 parts of liquid paraffin, 1-5 parts of emulsifying agent, 0.5-1 part of polyoxyethylene, 0.1-0.5 part of NaHCO3 and 180-200 parts of water. By means of the method for granulating the rubber vulcanization accelerator TETD, the manpower and material resources are saved; the energy consumption is reduced; the once granulation rate of the product is high; the average hardness is about 2N and the quality index accords with the standard of a first-grade product in China.

Description

technical field [0001] The invention relates to a granulation method of a rubber vulcanization accelerator tetraethylthiuram disulfide (TETD) and a binder for granulation, belonging to the technical field of TETD granulation production. Background technique [0002] Tetraethylthiuram disulfide (TETD) is a super-accelerator for natural rubber, styrene-butadiene rubber, nitrile rubber, butadiene rubber and latex, and can also be used as a vulcanizing agent. The effective sulfur content is 11% of its weight. When used as an accelerator, its performance is similar to that of the accelerator TMTD, but its activity is slightly lower, it is not easy to burn, safe to operate, and less prone to blooming. This product is an excellent second accelerator for thiazole accelerators, and can also activate aldehydes, amines, and guanidine accelerators. Zinc oxide is required when using this product as the first accelerator, but lead monoxide can inhibit it. This product is easy to dispers...

Claims

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Application Information

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IPC IPC(8): B01J2/28
Inventor 张超义王琰
Owner KEMAI CHEM
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