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Vulcanizing agent containing selenium and preparing method and application thereof

A technology of vulcanizing agent and selenium powder, applied in organic chemistry and other directions, can solve the problems of easy sublimation of elemental sulfur, inactivation of catalysts, harmful to human body, etc., and achieve the effect of solving the problem of waste of raw materials, easy industrial production and good chemical stability.

Active Publication Date: 2016-06-22
SOUTH CHINA INST OF COLLABORATIVE INNOVATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although elemental sulfur has the following advantages as a vulcanizing agent: high sulfur content, wide and cheap sources of raw materials, less environmental pollution, stable storage in the air, and convenient storage and transportation, etc., many disadvantages of elemental sulfur also limit its application as a vulcanizing agent. : First, elemental sulfur is easy to sublimate during the vulcanization process, which can easily cause a large loss of sulfur raw materials and block the pipeline; secondly, the sublimated elemental sulfur will chemically react with oxygen in the air under high temperature conditions to generate SO 2 Toxic gas is not only harmful to the human body but also pollutes the environment; third, the intense heat release of the reaction will easily burn the metal on the catalyst and cause the catalyst to lose its activity

Method used

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  • Vulcanizing agent containing selenium and preparing method and application thereof
  • Vulcanizing agent containing selenium and preparing method and application thereof
  • Vulcanizing agent containing selenium and preparing method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) Sulfur powder (95% of sulfur content) and selenium powder (95% of selenium content) are mixed by mass ratio after being 25:1, be placed in autoclave, then add the NaOH solution that pH is 8.0 and mix evenly, obtain Mixture; Wherein, the consumption of NaOH solution is 3% of the total mass of sulfur and selenium powder;

[0030] (2) Inject isobutene gas into the autoclave in step (1), and the amount of isobutene is 40% of the total molar weight of sulfur and selenium powder; the temperature of the reaction system is slowly raised to 245°C and then reacted at a constant temperature for 300min to obtain selenium-containing Vulcanizing agent, wherein the mass percent of selenium is 2.18%.

[0031] The decomposition temperature of the selenium-containing vulcanizing agent prepared in this example is shown in Table 1. Compared with n-butyl mercaptan and dimethyl disulfide, the thermal stability of the selenium-containing vulcanizing agent prepared in this example is signi...

Embodiment 2

[0035] (1) after sulfur powder (95% of sulfur content) and selenium powder (95% of selenium content) are mixed by mass ratio after being 15:1, be placed in autoclave, then add the NaOH solution that pH is 8.5 and mix evenly, obtain Mixture; Wherein, the consumption of NaOH solution is 3% of the total mass of sulfur and selenium powder;

[0036] (2) Inject isobutene gas into the autoclave in step (1), and the amount of isobutene is 40% of the total molar weight of sulfur and selenium powder; the temperature of the reaction system is slowly raised to 250°C and then reacted at a constant temperature for 300min to obtain selenium-containing Vulcanizing agent, wherein, the mass percent of selenium is 5.41%;

[0037] The decomposition temperature of the selenium-containing vulcanizing agent prepared in this example is shown in Table 2. Compared with n-butyl mercaptan and dimethyl disulfide, the thermal stability of the selenium-containing vulcanizing agent prepared in this example i...

Embodiment 3

[0041] (1) After mixing sulfur powder (95% of sulfur content) and selenium powder (95% of selenium content) by mass ratio, it is placed in an autoclave, and then adding a NaOH solution with a pH of 9.0 and mixing to obtain Mixture; Wherein, the consumption of NaOH solution is 3% of the total mass of sulfur and selenium powder;

[0042] (2) Inject isobutene gas into the autoclave in step (1), and the amount of isobutene is 40% of the total molar weight of sulfur and selenium powder; the temperature of the reaction system is slowly raised to 250°C and then reacted at a constant temperature for 300min to obtain selenium-containing Vulcanizing agent, wherein the mass percentage of selenium is 13.97%.

[0043] The decomposition temperature of the selenium-containing vulcanizing agent prepared in this example is shown in Table 1. Compared with n-butyl mercaptan and dimethyl disulfide, the thermal stability of the selenium-containing vulcanizing agent prepared in this example is sign...

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Abstract

The invention belongs to the field of rubber materials, and particularly relates to a vulcanizing agent containing selenium and a preparing method and application thereof.After sulfur is mixed with selenium powder, the catalyst strong base solution is added, then reaction with gas-state olefin lasts for 180-360 min at 245-250 DEG C, and then the vulcanizing agent containing selenium is obtained.The vulcanizing agent containing selenium is prepared by replacing the sulfur elementary substance with sulfur homdogy matter, the preparing method is easy to operate and low in cost, and industrial production can be achieved easily.The vulcanizing agent containing selenium is not softened easily at high temperature, heat stability is high, and chemical stability is high.

Description

technical field [0001] The invention belongs to the field of rubber materials, and in particular relates to a selenium-containing vulcanizing agent and its preparation method and application. Background technique [0002] Studies have shown that the earliest used vulcanizing agent is elemental sulfur, which is in a molten state at 130-160°C, with the lowest viscosity and best fluidity. In the absence of hydrogen, the hydrogenation catalyst is brought into contact with molten elemental sulfur. Since there are pores on the catalyst, when the molten elemental sulfur contacts the catalyst, part of the liquid sulfur will flow into the pores of the catalyst. In the process, the sulfur element in the molten state solidifies in the pores of the catalyst after the temperature is cooled. [0003] Although elemental sulfur has the following advantages as a vulcanizing agent: high sulfur content, wide and cheap sources of raw materials, less environmental pollution, stable storage in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C391/00C08K3/30C08L21/00
CPCC07C391/00C08K3/30C08K2003/3009C08L21/00
Inventor 朱立新石川
Owner SOUTH CHINA INST OF COLLABORATIVE INNOVATION
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