Method for preparing dispersible insoluble sulfur with high polymer material coating

A high-molecular material and high-dispersion technology, which is applied in the treatment of dyed high-molecular organic compounds, dyed low-molecular organic compounds, and fibrous fillers. Performance and other issues, to achieve the effect of facilitating rubber processing, improving dispersion, and simple operation

Active Publication Date: 2012-02-15
SHANDONG SUNSINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The insoluble sulfur product produced by this method has the advantages of high content, good thermal stability, low acidity, etc., but poor dispersion in rubber
The poor dispersion of insoluble sulfur can easily cause uneven vulcanization of the rubber compound, which affects the processing performance of the rubber compound, thereby affecting the performance of rubber products

Method used

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  • Method for preparing dispersible insoluble sulfur with high polymer material coating
  • Method for preparing dispersible insoluble sulfur with high polymer material coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1. After dissolving 0.1% (relative to the mass of sulfur) stearic acid with carbon disulfide, it is added to the drying tank of insoluble sulfur, and the carbon disulfide is condensed by a drying condenser for repeated use. The semi-finished product after drying and crushing is filled with 20% (relative to the total mass) of naphthenic oil to obtain the finished product of insoluble sulfur.

Embodiment 2

[0016] Example 2. After dissolving 0.3% (relative to the mass of sulfur) paraffin in chloroform, it was added to a drying tank for insoluble sulfur, and the chloroform was condensed by a drying condenser and reused. The semi-finished product after drying and pulverization is filled with 20% (relative to the total mass) oil to obtain the finished product of insoluble sulfur.

Embodiment 3

[0017] Example 3, after dissolving 0.5% (relative to the mass of sulfur) EVA resin in chloroform, it was added to the drying tank of insoluble sulfur, and the chloroform was condensed by a drying condenser and reused. The semi-finished product after drying and pulverization is filled with 20% (relative to the total mass) oil to obtain the finished product of insoluble sulfur.

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Abstract

The invention provides a method for improving the dispersibility of insoluble sulfur, characterized by adding a high polymer material coating agent in the drying process of preparation of the insoluble sulfur to carry out coating on IS powder, wherein, the high polymer material is added in the IS powder through dissolving with a solvent, and the addition of the high polymer material coating agent is 0.1-5 %. The high polymer material coating agent comprises stearic acid, paraffin, EVA resin, hydroxypropyl ethyl cellulose, polyethylene glycol, polyvinyl acetal resin, polyvinyl resin, natural rubber, polysulfide rubber, chloroprene rubber, butadiene-acrylonitrile rubber, styrene butadiene rubber and other high polymer substances. The solvent can be recycled after drying and condensation. The method has the advantages of simple operation and high efficiency, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a production method of insoluble sulfur, in particular to a method for preparing highly dispersible insoluble sulfur by covering with polymer materials. Background technique [0002] Insoluble sulfur is an allotrope of ordinary sulfur. It is a linear polymer formed by the polymerization of a large number of sulfur atoms. It is insoluble in carbon disulfide and insoluble in rubber, so it is called insoluble sulfur or polymeric sulfur. The scientific name is INSOLUBIESULFUR is polymeric sulfur (English name is INSOLUBIESULFUR, referred to as IS), it is mainly used as a vulcanizing agent in the rubber industry and is widely used in the production of rubber products such as tires. IS is usually produced by heating and vaporizing molten liquid sulfur, spraying it into a cooling medium, solidifying, extracting, drying, pulverizing, and oil-filling to obtain insoluble sulfur products. For specific production methods, please refer to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/00C09C3/10C09C3/08C08K9/10C08K3/06
Inventor 徐承秋刘经福王前文安松渠马跃彬张颂王波
Owner SHANDONG SUNSINE CHEM
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