Modified rubber composition and preparation method thereof

A technology for modifying rubber and composition, which is applied in the field of rubber composition with composite powder and its preparation, which can solve problems not involved in the application of composite powder, and achieve the effects of low cost, easy industrialization, and easy operation

Inactive Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of composite powder in rubber is not involved

Method used

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  • Modified rubber composition and preparation method thereof
  • Modified rubber composition and preparation method thereof
  • Modified rubber composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Sodium-based montmorillonite (produced by Qinghe Chemical Factory in Zhangjiakou, Hebei Province, with an average thickness of 1 nm layer) was mixed with water at a concentration of 5% by weight, dispersed by a high-shear disperser, and left for a period of time. 4Kg of commercially available styrene-butadiene rubber latex (produced by Shanghai Gaoqiao Petrochemical Company, trade mark: styrene-butadiene-5050) with a solid content of 45% by weight is placed in the container, and 54g of trimethylolpropane triacrylate is added dropwise under stirring. , after the dropwise addition was completed, stirring was continued for one hour. Then irradiate with cobalt source, the dose is 0.5 Mrad, and the dose rate is 50Gy / min. The gel content of the rubber particles in the latex after irradiation was 85%, and the average particle size of the particles was 100 nm. Mix the irradiated latex and sodium-based montmorillonite slurry according to the ratio of 70:30 of their dry weight, ...

Embodiment 2

[0041] The commercially available nitrile rubber latex (Lanhua Latex Development Center, trade mark: nitrile-26) 4Kg that solid content is 45% weight is placed in the container, drips trimethylol propane triacrylate 72g under the limit stirring, After the dropwise addition was complete, stirring was continued for one hour. Then irradiate with cobalt source, the dose is 1Mrad, and the dose rate is 50Gy / min. The gel content of the rubber particles in the latex after irradiation was 86%, and the average particle size of the particles was 100 nm. Coordinate the nitrile rubber latex after irradiation with calcium carbonate slurry (Beijing Nanotek Nano Technology Co., Ltd., the average size of calcium carbonate particles on one dimension is 40-60nm) according to the ratio of 40:60 of their dry weight, stir One hour, then spray the mixed solution through a spray dryer, the inlet temperature of the spray dryer is 140-160°C, the outlet temperature is 40-60°C, and the dried nitrile rub...

Embodiment 3

[0043] The nitrile rubber latex (with embodiment 2) after irradiation is matched with magnesium hydroxide slurry (Yixing chemical auxiliary agent factory, solid content 12.5%) by the ratio of 40: 60 of respective dry weight, stirs one hour, then The mixed solution is spray-dried by a spray dryer. The inlet temperature of the spray dryer is 140-160°C, and the outlet temperature is 40-60°C. The spray-dried nitrile rubber magnesium hydroxide composite powder is collected in the cyclone separator ( Composite powder 3 ).

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Abstract

The invention provides a rubber composition and a preparation method thereof. The rubber composition comprises the following components according to parts by weight: 100 parts of rubber and 40 to150 parts of composite powder; the composite powder includes inorganic nanoparticles and rubber particles; the method for preparing the composite powder comprises the following steps of evenly mixing the irradiated synthetic rubber latex and the serosity of the inorganic nanoparticles to obtain the mixed latex, and then drying the mixed latex; the weight ratio between the rubber particles and the inorganic nanoparticles is 70:30 to 30:70; the composite powder has good rubber reinforcement effect to rubber, and the unmodified inorganic nanoparticles in the composite powder can be evenly dispersed in the rubber; and meanwhile, the method for preparing the rubber composition is simple in process, easy to operate, low in cost, wide in application range and feasible for industrialization.

Description

technical field [0001] The present invention relates to a kind of modified rubber, more particularly, relates to a kind of rubber composition added composite powder and its preparation method. Background technique [0002] The main feature of nanocomposite materials is that the size of the dispersed phase in the composite system is less than 100nm in at least one dimension. Due to the nanoscale effect, large specific surface area and strong interface interaction, its performance is more significantly improved than traditional composite materials. . [0003] At present, the traditional reinforcing agents in the rubber industry include carbon black and white carbon black, but due to the low apparent density of these two reinforcing agents, flying is easy to occur during processing, which will inevitably cause harm to the operator's body, so , the use of new reinforcing agents has always been the focus of attention. Since the inorganic fillers widely used in the rubber indust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/04C08L9/08C08L23/08C08L31/04C08K3/26C08K3/34C08J3/26C08J3/28
Inventor 乔金樑东为富张晓红宋志海高建明赖金梅蔡传伦张红彬王亚黄源
Owner CHINA PETROLEUM & CHEM CORP
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