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Supported rubber anti-aging agent, as well as preparation method and application thereof

A rubber anti-aging agent, load-type technology, applied in the synthesis of rubber additives and rubber anti-aging fields, can solve the problems of environmental pollution, single function, low efficiency, etc., achieve large specific surface area, reduce pollution, reduce fire and explosion hazards Effect

Active Publication Date: 2013-11-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies of current rubber antioxidants such as low efficiency, single function, polluting the environment, and easy migration, and provide a new type of loaded rubber with high efficiency, multi-function, environmental friendliness, low migration, and low cost. The preparation method of antioxidant

Method used

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  • Supported rubber anti-aging agent, as well as preparation method and application thereof
  • Supported rubber anti-aging agent, as well as preparation method and application thereof
  • Supported rubber anti-aging agent, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 20g of precipitated silica (SiO 2 ) was dispersed in 300ml of ethanol, 4g of γ-chloropropyltrimethoxysilane was added, and the mixture was stirred and reacted at 60°C for 10 hours. Then 2.8 g of rubber anti-aging agent 2-mercaptobenzimidazole (MB) was added, and stirred and reacted for 12 hours under nitrogen protection and 80°C. The product was separated by centrifugation and washed with ethanol, and dried in a vacuum oven to constant weight to obtain the loaded antioxidant SiO 2 -g -MB. attached figure 1 It shows that the MB grafting rate of the antioxidant is 3.0%.

[0038] with SiO 2 - The basic formula of the styrene-butadiene rubber / silica composite material prepared by g-MB is shown in Table 1, and the unit of the dosage of each component is phr. attached figure 2 and 3 It is the change of the tensile strength and elongation at break retention rate of several vulcanizates aged at 100°C for different days. It can be seen that the SiO 2 -g-MB's SBR vulcan...

Embodiment 2

[0047] Disperse 100 g of halloysite nanotubes (HNTs) into 70 ml of acetone, add 15 g of γ-aminopropyltriethoxysilane, and react at 45° C. for 18 hours. Then add 8g of rubber anti-aging agent 2-mercaptobenzimidazole (MB), stir and react under nitrogen protection at 50°C for 20 hours, the product is centrifuged and washed with acetone, and dried in a vacuum oven to constant weight to obtain the final product HNTs-g -MB.

[0048] Raman spectrum showed that the synthesized product was the target product; thermogravimetric analysis showed that the mass fraction of MB contained in HNTs-g-MB was 3.18%.

[0049] The basic formulation of the natural rubber / halloysite composite material prepared with HNTs-g-MB is shown in Table 3, and the unit of the dosage of each component is phr. Table 4 shows the retention rate of tensile strength and elongation at break of the vulcanizate after aging at 100°C for different days. It can be seen that the thermal oxygen antiaging effect of HNTs-g-MB...

Embodiment 3

[0057] 10 grams of fumed silica (SiO 2 ) was dispersed in 200 ml of ethanol, 4 g of mercaptopropyltrimethoxysilane was added, stirred at 80°C for 12 hours, and then 50 ml of ethanol solution containing 3.2 g of 2-mercaptobenzimidazole (MB) was added dropwise at 50°C And 0.2 mole of hydrogen peroxide, the dropwise addition process is completed within 1 hour, after the dropwise addition is completed, keep the temperature and react for another 6 hours, the product is centrifugally washed with absolute ethanol, put into a vacuum oven and dry to constant weight to obtain the final product, namely Loaded multifunctional rubber additive SiO 2 -s -MB.

[0058] Product SiO 2 -S-MB prepared styrene-butadiene rubber / silica (SBR / SiO 2 ) The basic formula of the composite material is shown in Table 5, and the unit of the dosage of each component is phr. Table 6 is the vulcanization characteristic parameters of each sample. It can be seen from Table 6 that the loaded multifunctional ru...

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Abstract

The invention relates to a preparation method of a supported rubber anti-aging agent and an application thereof. The preparation method comprises the following steps of: firstly preparing a solution with the mass concentration of 0.5%-30% from a silane coupling agent and an organic solvent, further mixing with an inorganic carrier to form a mixture with the solid content of 2%-80%, and performing stirring reaction for 6-24h at the temperature of 40 DEG C-100 DEG C; then adding the rubber anti-aging agent in the molar concentration which is equivalent to 0.6-1.5 times of that of the coupling agent into a reaction product, and reacting for 10-20h at the temperature of 50 DEG C-80 DEG C under the protection of nitrogen; and finally filtering, washing and drying the reaction product to obtain the supported rubber anti-aging agent. The supported rubber anti-aging agent can significantly improve the aging protection effect of the anti-aging agent against rubber, integrates the functions of a reinforcing agent, an interface modifier and the like, reduces the environmental pollution and migration of the rubber anti-aging agent, becomes a high-efficient, multifunctional and environment-friendly novel rubber auxiliary, and has extensive application prospects in the rubber industry.

Description

technical field [0001] The invention relates to the synthesis of rubber additives and the fields of rubber anti-aging, in particular to loaded rubber anti-aging agents and their preparation methods, as well as their application in rubber. Background technique [0002] During the processing, storage and use of raw rubber and rubber products, due to the influence of heat, oxygen, light, ozone and other factors, it is easy to cause damage to the composition and structure of the rubber, causing performance degradation and gradually losing performance. The phenomenon is called aging of rubber. The substance that can prevent or delay the aging of rubber is called anti-aging agent. Antiaging agent is one of the main varieties of rubber additives. At present, the commonly used rubber anti-aging agents in the industry have the disadvantages of low anti-aging efficiency, single function, pollution to the environment, and easy migration. With the continuous improvement of the servic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L21/00C08L9/06C08K5/5455C07F7/10
Inventor 贾志欣钟邦超罗远芳贾德民
Owner SOUTH CHINA UNIV OF TECH
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