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Preparation method of wrapping sulphur vulcanizing agent capable of being used for production of rubber

A technology of vulcanizing agent and sulfur, which is applied in the field of preparation of coated sulfur vulcanizing agent, can solve the problems of unfavorable rubber products widely used, dangerous production operation, high price, etc., to avoid the problem of early vulcanization, the process is simple and feasible, and the compatibility is good Effect

Inactive Publication Date: 2019-03-19
BEIJING RES & DESIGN INST OF RUBBER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the disadvantages of high energy consumption and serious equipment corrosion; at the same time, carbon disulfide is flammable, explosive, and highly toxic, making the production operation very dangerous
In addition, the price of IS is very expensive, generally several to ten times that of ordinary sulfur, which is not conducive to the wide application of rubber products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] (1) Preparation of stable natural latex solution: add 200g natural latex solution (28.0% dry content), 80g water, 0.2g gelatin aqueous solution (mass fraction 10%) into the container, and stir under high-speed shear at 300 rpm , after stirring for 10 minutes, a stable natural rubber latex solution (dry content of 20%) was obtained and set aside;

[0013] (2) Preparation of sulfur suspension: Add 50g of ordinary sulfur and 450g of water into the container, stir and disperse with a shear emulsifier at 4000 rpm for 15min to obtain a stable sulfur dispersion suspension (mass fraction 10%), set aside;

[0014] (3) Mixing of latex solution and sulfur suspension: mix 200g of sulfur suspension and 60g of natural latex solution under high-speed stirring, add 0.01g of sodium lauryl sulfate, and carry out high-speed stirring at a stirring speed of 1500rpm for 20 minutes;

[0015] (4) After the sulfur suspension and the latex solution are mixed, they are coagulated, washed and drie...

Embodiment 2

[0017] (1) Preparation of stable natural rubber latex solution: add 175g natural rubber latex solution (31.2% dry content), 73.2g water, 0.175g gelatin aqueous solution (mass fraction 10%) into the container, stir under high-speed shear, and rotate at 200 rpm, after stirring for 10 minutes, a stable natural rubber latex solution (22% in dry content) was obtained and set aside;

[0018] (2) Preparation of sulfur suspension: Add 50g of ordinary sulfur and 450g of water into the container, stir and disperse with a shear emulsifier at 4000 rpm for 15min to obtain a stable sulfur dispersion suspension (mass fraction 10%), set aside;

[0019] (3) Mixing of latex solution and sulfur suspension: 200g of sulfur suspension and 63.63g of natural rubber latex solution were stirred at high speed, and 0.01g of sodium lauryl sulfate was added, and stirred at a high speed at 1500rpm for 20min;

[0020] (4) After the sulfur suspension and the latex solution are mixed, they are coagulated, wash...

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Abstract

The invention discloses a preparation method of a wrapping sulphur vulcanizing agent capable of being used for production of rubber. The preparation method comprises the step of preparing a wrapping sulphur product through a physical sedimentation method by taking common sulphur as a core material and taking rubber latex as a wall material. The process is simple, and the cost is low. The preparedwrapping sulphur product wraps a shell layer at a certain temperature, can melt and release sulphur, and can be used as a rubber vulcanizing agent.

Description

technical field [0001] The invention belongs to a preparation method of a coated sulfur vulcanizing agent that can be used in rubber production, and particularly relates to a preparation method of latex-coated sulfur microcapsules. Background technique [0002] Sulfur is a major rubber vulcanizing agent and is widely used in the vulcanization of rubber products. When the amount of sulfur is less than the solubility in rubber, the sulfur is in a stable dissolved state and will not migrate out. When the amount of sulfur is greater than the saturation solubility and is supersaturated, the sulfur is in an unstable dissolved state in the rubber compound. At this time, the temperature drops will cause the sulfur to crystallize and migrate to the surface of the rubber to form sulfur spray. The solubility of sulfur in rubber is affected by its crystal form. Ordinary sulfur has an S8 ring structure at room temperature, which is an orthorhombic-sulfur crystal, which is soluble in rub...

Claims

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Application Information

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IPC IPC(8): C08K9/10C08K3/06C08L21/00
CPCC08K3/06C08K9/10C08L21/00
Inventor 王永伟陆铭王婷李岩磊陈宏李花婷
Owner BEIJING RES & DESIGN INST OF RUBBER IND
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