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Preparation method of nano white carbon black used as rubber filler

A technology of nano-silica and rubber filler, which is applied in the field of preparation of synthetic rubber filler nano-silica with high dispersibility, can solve the problems such as easy agglomeration of nano-silica, and achieve large molecular steric hindrance effect and modification cost. Low, high connection strength effect

Pending Publication Date: 2020-04-28
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method not only solves the problem of easy agglomeration of nano-silica, but also eliminates the problem of reunion due to long-term storage

Method used

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  • Preparation method of nano white carbon black used as rubber filler
  • Preparation method of nano white carbon black used as rubber filler
  • Preparation method of nano white carbon black used as rubber filler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Preparation of grafted polystyrene: first add 100 parts of HIPS and 300 parts of xylene in the reaction kettle, and when heated to 50°C, stir for 5 hours. After the polystyrene is completely dissolved, add 5 parts of phthalic acid And 0.05 parts of DCP, after stirring for 1 hr, 5 parts of diethylhydroxylamine was added to terminate the reaction, and after suction filtration and washing, polystyrene graft a (grafting rate 0.9%) was obtained.

[0049] (2) Preparation of highly dispersed nano-silica: Take 100 parts of nano-silica (40nm), 5 parts of DINP, and 200 parts of cyclohexane into the polymerization kettle, heat up to 40 ° C, stir for 1 hr; then add 7 parts of polystyrene graft a, stirred and reacted for 2 hours, then flashed, dried and ground to obtain highly dispersed nano-silica. Sampling and analysis: standard samples were made, and the tested properties are shown in Table 1.

Embodiment 2

[0051] (1) Preparation of grafted polystyrene: with embodiment 1.

[0052] (2) Preparation of highly dispersed nano-silica: 100 parts of nano-silica (40nm), 7 parts of DINP, and 260 parts of cyclohexane were added to the polymerization kettle, the temperature was raised to 45°C, and the reaction was stirred for 1.5hr; then Add 9 parts of polystyrene graft a, stir and react for 2.5 hours, then flash, dry and grind to obtain high-dispersion nano-silica. Sampling and analysis: standard samples were made, and the tested properties are shown in Table 1.

Embodiment 3

[0054] (1) Preparation of grafted polystyrene: with embodiment 1.

[0055] (2) Preparation of highly dispersed nano-silica: 100 parts of nano-silica (40nm), 9 parts of DINP, and 260 parts of cyclohexane were added to the polymerization kettle, the temperature was raised to 45°C, and the reaction was stirred for 1.5hr; then Add 12 parts of polystyrene graft a, stir and react for 2.5 hours, then flash, dry and grind to obtain high-dispersion nano-silica. Sampling and analysis: standard samples were made, and the tested properties are shown in Table 1.

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Abstract

The invention relates to a preparation method of nano white carbon black used as a rubber filler. A purpose of the invention is to provide a modification method for high dispersity of nano white carbon black used as a rubber filler. According to the method, the surfaces of nano white carbon black particles are anchored and modified by adopting diester phthalate, then polystyrene is grafted by adopting organic dibasic acid, and finally the surfaces of the nano white carbon black particles are coated with the polystyrene to form a hard shell with high connection strength and high hindrance to isolate the nano white carbon black. The method solves the problem that the nano white carbon black particles are agglomerated again due to long-term storage, endows the nano white carbon black with dispersity in a solution polymerized styrene-butadiene rubber system, and is low in modification cost and small in environmental pollution.

Description

technical field [0001] The invention relates to a method for preparing synthetic rubber filler nano white carbon black with high dispersibility. Background technique [0002] Nano-silica is a white, non-toxic, amorphous fine powder, which is hydrated amorphous silica or colloidal silica (Si0 2 ·nH 2 0), has excellent properties such as porosity, large internal surface area, high dispersion, 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 silica is used in the rubber industry. It is an excellent rubber reinforcing agent. It can effectively reduce the hysteresis of the rubber while improving the physical and mechanical properties of the rubber. These characteristics are used as fillers in the preparation of energy saving and environmental protect...

Claims

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Application Information

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IPC IPC(8): C08K9/10C08K9/04C08K3/36C08L9/06
CPCC08K9/10C08K9/04C08K3/36C08K2201/011C08L9/06
Inventor 赵洪国李晶张华强胡海华徐典宏吴宇宋中勤
Owner PETROCHINA CO LTD
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