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Method for preparing modified white carbon black

A technology of silica and modification, applied in the field of preparation of modified silica, can solve problems such as poor compatibility, and achieve the effect of preventing agglomeration and improving interfacial adhesion.

Inactive Publication Date: 2010-09-01
甘肃银光聚银化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most inorganic nanofillers are poorly compatible with polymer matrices, so surface modification is required to improve their compatibility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Activate 100g of white carbon black, then heat to 250°C under the protection of nitrogen, activate for 4 hours, then stir and mix the activated white carbon black with 10g of toluene isocyanate, add 500mL of anhydrous xylene to the mixture, Under the protection of nitrogen, stir and disperse at a high speed at room temperature, then heat to the reaction temperature of 60°C, filter after 20 minutes, and wash with anhydrous xylene solvent to remove the modifier with weak surface binding. Drying is carried out in a vacuum environment to obtain toluene isocyanate modified white carbon black after drying.

Embodiment 2

[0012] Activate 100g of white carbon black, then heat it to 300°C under the protection of nitrogen, activate for 4h, then stir and mix the activated white carbon black with 15g of TDI, add 500mL of anhydrous Toluene, under the protection of nitrogen, first stir and disperse at room temperature at high speed, then heat to the reaction temperature of 70 ° C, after 20 minutes, filter, wash with anhydrous toluene solvent to remove the modifier with weak surface binding, and vacuum at about 40 ° C The environment is dried, and TDI modified white carbon black is obtained after drying.

Embodiment 3

[0014] Activate 50g of white carbon black, then heat it to 250°C under the protection of nitrogen, activate for 4 hours, then stir and mix the activated white carbon black with 10g of toluene isocyanate, add 300mL to the reactor containing the mixture Anhydrous toluene, under the protection of nitrogen, first stir and disperse at room temperature at a high speed, then heat to a reaction temperature of 85°C, filter after 60 minutes, and wash with anhydrous toluene solvent to remove the modifier with weak surface binding, Drying is carried out in a vacuum environment at about 40°C, and the toluene isocyanate-modified white carbon black is obtained after drying.

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PUM

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Abstract

The invention discloses a method for preparing modified white carbon black, which comprises the following steps of: under the protection of nitrogen, heating and activating white carbon black for 4 to 5 hours; mixing the activated white carbon black and toluenediisocyanate, wherein the use amount of the toluenediisocyanate is 10 to 20 percent of that of the white carbon black; adding anhydrous dimethylbenzene into the mixture, wherein the ratio of the volume of the anhydrous dimethylbenzene to the mass of the white carbon black is 5-8:1; under the protection of nitrogen, stirring and dispersing at room temperature, and heating to the temperature of between 60 and 85 DEG C; and filtering and drying to obtain the modified white carbon black.

Description

technical field [0001] The invention relates to a preparation method of modified white carbon black. Background technique [0002] The chemical name of silica is hydrated amorphous silica or colloidal silica (SiO 2 ·nH 2 O), is a white, non-toxic, amorphous fine powder. Its SiO 2 The content is relatively large (>90%), and the primary particle size is generally 10-40nm. Because the surface contains more hydroxyl groups, it is easy to absorb water and become aggregated fine particles. Silica has excellent properties such as porosity, large internal surface area, high dispersibility, light weight, good chemical stability, high temperature resistance, non-combustibility, and good electrical insulation. It is mainly used as a filler for rubber, plastics, synthetic resins and paints, and also as a lubricant and insulating material. At present, 70% of the world's white carbon black is used in the rubber industry. It is an excellent rubber reinforcing agent, which can impro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12
Inventor 马建军冯辉霞李晓明魏云
Owner 甘肃银光聚银化工有限公司
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