Preparation method of novel rubber vulcanizing activator

A rubber vulcanization and active agent technology, which is applied in the field of low-temperature preparation of new vulcanization active agents, can solve the problems of aquatic species threat, environmental pollution, waste of resources, etc., and achieve the effects of protecting the environment, improving mechanical properties, and reducing agglomeration

Inactive Publication Date: 2018-03-20
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, traditional zinc oxide cannot fully participate in the vulcanization reaction in rubber, resulting in a large waste of resources. Most importantly, the remai

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  • Preparation method of novel rubber vulcanizing activator
  • Preparation method of novel rubber vulcanizing activator
  • Preparation method of novel rubber vulcanizing activator

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preparation example Construction

[0025] A method for preparing a novel vulcanization activator based on silicon dioxide dispersion of the present invention comprises the following steps: 1) dispersing the ground silicon dioxide in ethanol, and adding zinc sulfate solution after continuously stirring the suspension for 1 hour at room temperature , and then warm up and add sodium hydroxide solution; 2) heat up and age, wash and filter, and dry into powder.

[0026] In order to obtain the optimal dispersion effect, the ratio of the new vulcanization activator to silicon dioxide was adjusted several times, and the best experimental parameters were obtained by comparing the experimental results.

Embodiment 1

[0029] 1) Preparation of silica suspension

[0030] Add 8 g of silicon dioxide ground for 1 h into 200 ml of absolute ethanol, ultrasonically disperse for 5 min, transfer to a flask at room temperature and continue magnetic stirring for 6 h at a stirring rate of 800 r / min.

[0031] 2) Preparation of new vulcanization activator

[0032] Add 28.7g of zinc sulfate heptahydrate to 10ml of deionized water, then add 90ml of absolute ethanol to dilute, ultrasonically dissolve, and 8.0g of sodium hydroxide to make a sodium hydroxide solution according to the above steps. First, add the zinc sulfate solution into the suspension in step 1), heat up and stir for 5 minutes, then quickly push the sodium hydroxide solution into the mixture with a medical syringe, and continue stirring for 30 minutes.

[0033] 3) Post-aging treatment

[0034] For the mixed solution in step 2), the temperature is raised to 100° C. for aging treatment, and at the same time, it is condensed and refluxed, and ...

Embodiment 2

[0039] 1) Preparation of silica suspension

[0040] Add 6 g of silicon dioxide ground for 1 h into 200 ml of absolute ethanol, ultrasonically disperse for 10 min, transfer to a 5 L flask and stir at room temperature for 30 min at a stirring rate of 2000 r / min.

[0041] 2) Preparation of new vulcanization activator

[0042] Add 14.5g of zinc sulfate heptahydrate to 10ml of deionized water, then add 90ml of absolute ethanol to dilute, ultrasonically dissolve, and 4.0g of sodium hydroxide to prepare a sodium hydroxide solution according to the above steps. First, zinc sulfate solution was added to the suspension in step 1), heated to 80° C. and stirred for 5 minutes, and then sodium hydroxide solution was injected into the mixture within 30 minutes using a medical syringe, and stirred for 30 minutes.

[0043] 3) Post-aging treatment

[0044] For the mixed liquid in step 2), the temperature is raised to 100° C. for aging treatment, and the stirring is continued for about 1 h. F...

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Abstract

The invention discloses a preparation method of a novel rubber vulcanizing activator. A final product can be applied to the rubber vulcanizing process. The preparation method of the novel rubber vulcanizing activator comprises the following steps of (1) dispersing the ground silicon dioxide powder into an ethyl alcohol solution, and sufficiently stirring at normal temperature, so as to obtain a uniformly-dispersed suspension liquid with certain concentration; (2) adding a zinc sulfate ethyl alcohol solution into the silicon dioxide suspension liquid in step (1), heating, and continuing to stir; (3) adding a sodium hydroxide, water and ethyl alcohol mixed solution into a mixing solution in step (2), stirring for certain time, heating to certain temperature, and aging; (4) washing and filtering the mixing solution, and placing into an oven to dry, so as to obtain a final silicon dioxide-dispersed novel vulcanizing activator. The novel rubber vulcanizing activator has the advantages thatthe novel rubber vulcanizing activator is synthesized at low temperature and is used for replacing the existing vulcanizing activator, the synthesizing method is simple, the usage amount of zinc is reduced, the environment is favorably protected, and the production cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of using zinc-containing minerals as rubber vulcanization activators, in particular to a method for preparing a novel vulcanization activator at low temperature. Background technique [0002] Zinc oxide has a good effect as a rubber vulcanization activator with sulfur as a vulcanizing agent, and it is also the most commonly used vulcanization activator in the rubber field today. As a vulcanization activator of rubber, zinc oxide can not only increase the crosslink density of rubber, change the density and distribution of crosslink bonds, but also improve the thermodynamic properties of rubber. Therefore, zinc oxide is widely used in the rubber industry. However, traditional zinc oxide cannot fully participate in the vulcanization reaction in rubber, resulting in a large waste of resources. Most importantly, the remaining zinc oxide is released into the environment after rubber is used and scrapped, causing e...

Claims

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Application Information

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IPC IPC(8): C08K3/36C08K3/22C08K7/00C08K9/02C08L21/00
CPCC08K3/36C08K3/22C08K7/00C08K9/02C08K2003/2296C08K2201/011C08L21/00
Inventor 姜海波李春忠崔健周梅芳
Owner EAST CHINA UNIV OF SCI & TECH
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