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Method for granulating accelerator CBS (N-Cyclohexyl-2-benzothiazole) and binder adopted in method

A binder and accelerator technology, which is applied in the field of direct granulation of wet material CBS, can solve the problems of failure to achieve the purpose of granulation, long mixing time, difficulty in dispersion, etc., and achieve good effect and elongation at break The advantage of high efficiency and the effect of less dosage

Inactive Publication Date: 2011-04-27
KEMAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] During the application process of CBS granules, the hardness of the granules is too high, resulting in difficulty in dispersion, unevenness, and long mixing time. Purpose

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Prepare the binder according to the attached table 1, add the prepared binder into the mixing pot together with the CBS wet material (moisture ≤ 18%) at a ratio of 4‰ of the weight of the dry CBS material, and mix thoroughly , put it into the granulator, and convey the wet material through the screw conveying to extrude uniform cylindrical particles 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 82%, and the average hardness is about 2.00N, which can fully meet the user's requirements, and the product performance is no different from that of CBS powder.

[0037] Attached Table 1: Binder Composition

[0038] Element

Embodiment 2

[0040] Prepare the binder according to the attached table 2, add the prepared binder into the mixing pot together with the CBS wet material (moisture ≤ 18%) at a ratio of 1.5% of the weight of the CBS dry product, and after fully stirring and mixing, Put it into the granulator, convey the wet material through the screw conveying, extrude the uniform cylindrical granules 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 70°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 82.9%, and the average hardness is about 2.00N, which can fully meet the requirements of users, and the product performance has no difference compared with CBS powder.

[0041] Attached T...

Embodiment 3

[0045] Prepare the binder according to the attached table 3, add the prepared binder into the mixing pot together with the CBS wet material (moisture ≤ 18%) at a ratio of 3% of the weight of the CBS dry product, and after fully stirring and mixing, Put it into the granulator, convey the wet material through the screw conveying, extrude the uniform cylindrical granules 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 80°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 83.8%, and the average hardness is about 2.00N, which can fully meet the requirements of users, and the product performance has no difference compared with CBS powder.

[0046] Attached Tab...

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Abstract

The invention discloses a method for granulating accelerator CBS (N-Cyclohexyl-2-benzothiazole) and a binder adopted in the method. The method comprises the following steps: preparing the binder by povidone, vinyl acetic ester, saline cross linking agent, liquid paraffin, emulsifier, polyvinyl alcohol, dispersant, sodium bicarbonate and water; adding the prepared binder and a CBS wet material in a stir tank to sufficiently stir and uniformly mix; adding into a granulator to extrude cylindrical particles; after the particles are dried in a belt dryer, separating particles and powder by a vibration screen; and directly packaging the particle products on the screens to form finished products, and returning the screened powder to the stir tank to stir and granulate once again. The binder has reasonable formula, has strong compatibility with a plurality of rubbers, the product has high one-time granulating rate, the binder has no adverse influence on the product, and the application performance of the product has a certain advantage; the one-time granulating rate of the product granulated by the granulating method reaches over 82 percent, and the average hardness is about 2N, and no crushed particle is found in the actual process of moving the package, and the quality index of the package accords with the standard of national first grade products.

Description

technical field [0001] The invention relates to a granulation method of a rubber vulcanization accelerator CBS (the chemical name is N-cyclohexyl-2-benzothiazole sulfenamide). The production method of raw material CBS direct granulation. Background technique [0002] Accelerator CBS is a highly active post-effect semi-overspeed accelerator with excellent anti-scorch performance, safe processing and short vulcanization time. Due to the low density of CBS dust, easy to fly, easy to thermally decompose, easy to adhere to the metal surface, easy to cause allergic symptoms and other characteristics, so with the increasingly stringent requirements of environmental protection management and industrial use process, powder products are becoming more and more popular in the industry. Many are replaced by granular products. Compared with powder products, granular products have the following advantages: no dust flying during use, and are user-friendly products; granular products have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F271/02C08K13/02C08K5/5419C08K5/5425C08K3/26C08K9/00C08K5/47C08L29/04C08L21/00C08L51/00
Inventor 尹红伟李全成
Owner KEMAI CHEM
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