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Tellurium-containing vulcanizing agent, and preparation method and application thereof

A technology of vulcanizing agent and tellurium powder, applied in the field of rubber materials, can solve the problems of catalyst inactivation, easy sublimation of elemental sulfur, harmful to human body, etc., and achieves the effects of easy industrial production, good chemical stability, and good thermal stability.

Active Publication Date: 2016-06-08
SOUTH CHINA INST OF COLLABORATIVE INNOVATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] As a vulcanizing agent, it has the following advantages: high sulfur content, wide and cheap sources of raw materials, less environmental pollution, can be placed stably in the air, convenient for storage and transportation, etc. However, many shortcomings of sulfur single substance also limit its application as a vulcanizing agent: its First, elemental sulfur is easy to sublime during the vulcanization process, which may easily cause a large loss of sulfur raw materials and block the pipeline; second, the sublimated elemental sulfur will chemically react with oxygen in the air under high temperature conditions to form 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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  • Tellurium-containing vulcanizing agent, and preparation method and application thereof
  • Tellurium-containing vulcanizing agent, and preparation method and application thereof
  • Tellurium-containing vulcanizing agent, and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0033] (1) After mixing sulfur powder (95% sulfur content) and tellurium powder (95% tellurium content) in a mass ratio of 25:1, they are placed in a high-pressure reactor, and NaOH solution with a pH of 8.0 is added to obtain a mixture; wherein , the consumption of NaOH solution is 1% of the total mass of sulfur and tellurium powder;

[0034] (2) Inject isobutene gas into the high-pressure reactor in step (1), and the amount of isobutene is 40% of the total molar weight of sulfur and tellurium powder; slowly raise the temperature of the reaction system to 480° C. and then react at a constant temperature for 300 minutes to obtain tellurium-containing Vulcanizing agent, wherein, the mass percentage of tellurium is 1.57%;

[0035] The decomposition temperature of the tellurium-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 tellurium-containing vulcanizing agent prepar...

Embodiment 2

[0039] (1) After mixing sulfur powder (95% sulfur content) and tellurium powder (95% tellurium content) in a mass ratio of 10:1, they are placed in a high-pressure reactor, and NaOH solution with a pH of 8.5 is added to obtain a mixture; wherein , the consumption of NaOH solution is 3% of the total mass of sulfur and tellurium powder;

[0040] (2) Inject isobutene gas into the autoclave in step (1), and the isobutene consumption is 40% of the total molar weight of sulfur and tellurium powder; the temperature of the reaction system is slowly raised to 485° C. and then reacted at a constant temperature for 300 minutes to obtain a mixture containing Tellurium vulcanizing agent, wherein, the mass percentage of tellurium is 3.14%;

[0041] The decomposition temperature of the tellurium-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 tellurium-containing vulcanizing agent ...

Embodiment 3

[0045] (1) After mixing sulfur powder (95% sulfur content) and tellurium powder (95% tellurium content) in a mass ratio of 5:1, they are placed in a high-pressure reactor, and NaOH solution with a pH of 9.0 is added to obtain a mixture; wherein , the consumption of NaOH solution is 5% of the total mass of sulfur and tellurium powder;

[0046] (2) Inject isobutene gas into the high-pressure reactor in step (1), and the amount of isobutene is 40% of the total molar weight of sulfur and tellurium powder; slowly raise the temperature of the reaction system to 490° C. and then react at a constant temperature for 300 minutes to obtain tellurium-containing Vulcanizing agent, wherein, the mass percentage of tellurium is 7.77%;

[0047] The decomposition temperature of the tellurium-containing vulcanizing agent prepared in this example is shown in Table 3. Compared with n-butyl mercaptan and dimethyl disulfide, the thermal stability of the tellurium-containing vulcanizing agent prepare...

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Abstract

The invention belongs to the field of rubber materials, and particularly relates to a tellurium-containing vulcanizing agent, and a preparation method and application thereof. The preparation method comprises the following steps: mixing sulfur and tellurium powder, adding a catalyst strong alkali solution, and carrying out reaction with gas olefins at 480-490 DEG C for 180-360 minutes, thereby obtaining the tellurium-containing vulcanizing agent. The tellurium with the same family as sulfur is used instead of the sulfur simple substance to prepare the tellurium-containing vulcanizing agent. Thus, the preparation method is simple to operate and low in cost, and can easily implement industrial production. The tellurium-containing vulcanizing agent has the advantages of low softening tendency at high temperature, favorable heat stability and favorable chemical stability.

Description

technical field [0001] The invention belongs to the field of rubber materials, and in particular relates to a tellurium-containing vulcanizing agent and its preparation method and application. Background technique [0002] In recent years, the industrial status of the automobile industry in my country has become increasingly important. However, the quality of automobile tires is directly related to the driving performance and quality performance of automobiles. The main functions of tires are to support loads and relieve automobile momentum. [0003] After more than 60 years of development, my country has become a major tire producer in the world. In the tire manufacturing industry, my country vigorously applies new technologies to improve the industrial system, focuses on safety and environmental protection economy, keeps pace with the development of the world tire industry, and has achieved some internationally leading scientific research results through continuous resear...

Claims

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Application Information

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IPC IPC(8): C08K5/48C08L21/00
CPCC08K5/48C08L2201/08C08L21/00
Inventor 朱立新石川
Owner SOUTH CHINA INST OF COLLABORATIVE INNOVATION
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