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Loaded-type rubber vulcanization accelerant as well as preparation method and application thereof

A rubber vulcanization and accelerator technology, applied in the field of loaded rubber vulcanization accelerator and its preparation, can solve the problems of environmental pollution, promotion efficiency to be improved, single function, etc., achieve large specific surface area, increase apparent crosslinking density, Improve the effect of the reinforcing effect

Active Publication Date: 2013-10-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages and deficiencies of current rubber vulcanization accelerators, such as the need to improve the promotion efficiency, single function, and pollute the environment, and provide a method for preparing a new-type loaded rubber vulcanization accelerator with high efficiency, multifunctionality and environmental friendliness.

Method used

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  • Loaded-type rubber vulcanization accelerant as well as preparation method and application thereof
  • Loaded-type rubber vulcanization accelerant as well as preparation method and application thereof
  • Loaded-type rubber vulcanization accelerant as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 20g of precipitated silica (SiO 2 ) was dispersed in 300ml of ethanol, 4g of γ-chloropropyltriethoxysilane was added, and reacted at 70°C for 10 hours to obtain coupling agent modified silica (m-SiO 2 ). Then add 2.8g vulcanization accelerator 2-mercaptobenzothiazole (M) and react at 80°C for 18 hours. The product is centrifuged and washed with ethanol, and dried in a vacuum oven to constant weight to obtain a supported vulcanization accelerator. SiO 2 -g-M.

[0024] The infrared spectrum of the above-mentioned loaded vulcanization accelerator after solvent extraction (attached figure 1 ) shows that at 1457cm -1 and 1515cm -1 The absorption band is added at , which corresponds to the vibration absorption of the benzene ring in the accelerator M, indicating that the accelerator M is successfully grafted on the surface of silica through the bridging effect of the coupling agent, and the synthesized product is the target product. Thermogravimetric analysis (attached ...

Embodiment 2

[0034] Dissolve 15g of γ-chloropropyltrimethoxysilane in 80g of acetone, mix it with 150g of halloysite nanotubes (HNTs), stir and react at 50°C for 20 hours, and obtain coupling agent-modified halloysite nanotubes (m-HNTs) dispersion. Then 12 g of vulcanization accelerator M (2-mercaptobenzothiazole) was added, and the reaction was stirred at 50° C. for 20 hours. The product was filtered and dried to constant weight to obtain the supported vulcanization accelerator HNTs-g-M.

[0035] Infrared spectrum showed that the synthesized product was the target product. Thermogravimetric analysis showed that the mass fraction of accelerator M in HNTs-g-M was 3.78%. The basic formula of the styrene-butadiene rubber / halloysite composite material prepared with HNTs-g-M is shown in Table 4, and the vulcanization parameters of the corresponding compound are shown in Table 5. It can be seen from Table 5 that compared with the same amount of unloaded vulcanization accelerator M, HNTs-g-M c...

Embodiment 3

[0044] Dissolve 12g of γ-mercaptopropyltriethoxysilane in 300ml of toluene, then add 45g of fumed silica and stir to disperse into a mixed solution, react at 90°C for 8 hours, then add 12g of vulcanization accelerator N-cyclohexane Base-2-benzothiazole sulfenamide (accelerator CZ), stirred and reacted at 80°C for 8 hours under nitrogen protection. The product is filtered and dried to obtain the final product loaded accelerator SiO 2 -g -CZ.

[0045] Infrared spectroscopy and nuclear magnetic resonance showed that the synthesized product was the target product SiO 2 -g -CZ. Thermogravimetric analysis showed that the mass fraction of N-cyclohexyl-2-benzothiazole sulfenamide in the supported rubber vulcanization accelerator was 3.14%. Table 7 shows that compared with the same amount of unloaded vulcanization accelerator CZ, HNTs-g-CZ can significantly increase the vulcanization rate, shorten the normal vulcanization time Tc90 of the compound, and maintain a longer scorch time ...

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Abstract

The invention relates to a loaded-type rubber vulcanization accelerant as well as a preparation method and an application thereof. The loaded-type rubber vulcanization accelerant is prepared by firstly, blending a silane coupling agent and an organic solvent into a 0.5-30% by mass solution, mixing with an inorganic carrier and forming into a mixture with a solid content of 2-80%, stirring for 6-30 hours at 40-100 DEG C, subsequently adding a rubber vulcanization accelerant with a mole number which is 1.0-1.8 times of that of the coupling agent into a product of the reaction, reacting for 10-20 hours under the protection of nitrogen at 50-80 DEG C, and finally filtering and drying the reaction product. The loaded-type rubber vulcanization accelerant is capable of remarkably improving the vulcanization acceleration efficiency of rubber and reducing environment pollution caused by an ordinary accelerant, has the functions of a reinforcing agent, an interfacial modifier and the like, is an efficient, multifunctional, environment-friendly and novel rubber chemical, and has a wide application prospect in the rubber industry.

Description

technical field [0001] The invention relates to the fields of rubber additives and rubber vulcanization, in particular to a loaded rubber vulcanization accelerator and its preparation method and application. Background technique [0002] Vulcanization accelerator is the most important variety of rubber additives, which has many advantages such as promoting rubber vulcanization, shortening vulcanization time, lowering vulcanization temperature, reducing the amount of vulcanizing agent and improving the physical and mechanical properties of vulcanized rubber. However, the rubber vulcanization accelerators commonly used in industry have the disadvantages of further improvement in promotion efficiency, single function, and pollution to the environment. With the continuous improvement of modern industry and national defense requirements for the production and use of rubber products, the preparation of new rubber vulcanization accelerators with high efficiency, multi-function, env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/12C08K9/06C08K3/36C08K5/47C08K5/31C08L7/00C08L9/06
Inventor 贾志欣钟邦超罗远芳贾德民
Owner SOUTH CHINA UNIV OF TECH
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