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Granulation binder for accelerator NOBS (N-(Oxidiethylene)-2-Benzothiazolyl Sulfenamide) and NOBS granulation method

A technology of accelerator and binder, applied in special adhesive granulation, adhesive, non-polymer organic compound adhesive, etc., can solve the problems of insufficient hardness, low granulation rate, difficult dispersion, etc. Advantages of elongation, high granulation rate at one time, easy industrialization effect

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

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] During the application process of NOBS 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

example 1

[0030] Prepare the binder according to the attached table 1, add the prepared binder into the mixing pot together with the NOBS wet material at a ratio of 1‰ of the weight of the NOBS dry product. The NOBS wet material has a water content of 25% and is fully stirred. After mixing, put it into the granulator, and 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. After drying at 70°C in a belt dryer, use The vibrating sieve separates 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 by this method is as high as 80%, 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 NOBS powder.

[0031...

example 2

[0034] Prepare the binder according to the attached table 2, add the prepared binder into the mixing pot together with the NOBS wet material at a ratio of 5‰ of the weight of the NOBS dry product, and the NOBS wet material has a water content of 10%; after fully stirring After mixing, put it into the granulator, and 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. After drying at 75°C with a belt dryer, use The vibrating sieve separates 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 81.7%, 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 NOBS powde...

example 3

[0039] Prepare the binder according to the attached table 2, add the prepared binder into the mixing pot together with the NOBS wet material at a ratio of 2% by weight of the NOBS dry product, the NOBS wet material has a water content of 5%, and stir thoroughly After mixing, put it into the granulator, and 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. After drying in a belt dryer at 85°C, use The vibrating sieve separates 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 83.5%, 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 NOBS powder.

[0040]...

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Abstract

The invention relates to a granulation binder for an accelerator NOBS (N-(Oxidiethylene)-2-Benzothiazolyl Sulfenamide) and an NOBS granulation method. The novel composite binder comprises the components of polyvinyl alcohol, vinylacetate, liquid paraffin, an emulsifier, polyoxyethylene, a dispersing agent, NaHCO3 and water. The NOBS granulation method comprises the steps of: adding the binder into an NOBS wet material, fully and uniformly stirring, adding into a granulator, conveying by a screw to ensure that the wet material is extruded from a nose template hole to form cylindrical granules with the uniform diameter of 2+ / -0.2mm, drying by a belt type dryer at 70-85 DEG C, separating granules and powder with a vibrating screen, directly packaging granular products on the screen to obtain the finished product, returning powder below the screen to an agitator kettle, and stirring and granulating again. The granulation method provided by the invention has simple process and is easy for industrialization, and the NOBS product granulated with the method has the primary granulation rate up to above 80%, the average hardness to be about 2N and the diameter to be 2+ / -0.2mm, can completely meet user requirements, has no granule breakage phenomenon in the actual packaging and moving processes, and is proved to be in accordance with a first-class standard on quality indexes in China through assay and measurement.

Description

technical field [0001] The invention relates to a granulation method of a rubber vulcanization accelerator N-oxybis(1,2-ethylene)-2-benzothiazole sulfenamide (NOBS), in particular to an accelerator NOBS granulation binder and NOBS granulation method. Background technique [0002] This product NOBS is an aftereffect rapid vulcanization accelerator. Less activity, greater delay, strong scorch resistance, safe operation, easy to disperse, no blooming, slight discoloration. The vulcanizate has good physical properties and aging resistance. It is mainly used in the manufacture of tires, inner tubes, rubber shoes, tapes, rubber materials for retreading tires, etc. With the increasingly stringent requirements for environmental health management and industrial use, because NOBS will produce nitrosamine carcinogens during the vulcanization process, in order to avoid dust and other problems, more and more powder products are replaced by granular products in the industry. . Compar...

Claims

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Application Information

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IPC IPC(8): C09J4/06B01J2/28C08L21/00C08K5/47
Inventor 朱军李树东
Owner KEMAI CHEM
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