Modification method of nano white carbon black

A nano-silica, modification technology, applied in the direction of fibrous fillers, dyeing polymer organic compounds, etc., can solve the problems of easy agglomeration

Inactive Publication Date: 2017-10-20
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, endows nano-silica with super-dispersibility, but also eliminates the problem of re-agglomeration due to long-term storage, ensuring the stability of long-term storage

Method used

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  • Modification method of nano white carbon black
  • Modification method of nano white carbon black
  • Modification method of nano white carbon black

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Preparation of monomer pre-emulsion: put 100 parts of styrene, 1 part of sodium dodecylbenzene sulfonate, 100 parts of deionized water, 1.0 part of sodium hydroxide, and 0.01 part of potassium persulfate into the reactor. When the temperature was raised to 40°C, the reaction was stirred for 30 minutes to prepare a styrene pre-emulsion liquid a.

[0040] (2) Preparation of mixed polar monomer mixture: Take 100 parts of methyl methacrylate (MMA) and 15 parts of acrylamide into the reactor and stir and mix for 5 minutes; then add 50 parts of deionized water and 1 part of hydrogen. Sodium oxide was stirred and mixed for 10 minutes to form a mixed polar monomer mixture a (pH of the mixture a=7.2).

[0041] (3) Preparation of modified nano-silica: take 100 parts of nano-silica (40nm) and 5 parts of polar monomer mixture a, 200 parts of deionized water, and 1.0 part of sodium hydroxide into the polymerization kettle and stir. Mix for 10 minutes; then add 1 part of sodium dodec...

Embodiment 2

[0043] (1) Preparation of monomer pre-emulsion: the same as in Example 1.

[0044] (2) Preparation of mixed polar monomer mixture: the same as in Example 1.

[0045] (3) Preparation of modified nano-silica: take 100 parts of nano-silica (40nm) and 10 parts of polar monomer mixture a, 260 parts of deionized water, and 2.0 parts of sodium hydroxide into the polymerization kettle and stir. Mix for 20 minutes; then add 2 parts of sodium dodecylbenzene sulfonate and 2.0 parts of styrene pre-emulsion a, stir and heat up to 65°C, then stir and mix for 25 minutes to form the seed of a composite emulsion centered on nano-silica powder ; Then 15 parts of styrene pre-emulsion a and 0.13 parts of potassium persulfate are added, after 4.0 hours of reaction, 0.2 parts of diethylhydroxylamine are finally added, washed, dehydrated, dried, and ground to obtain modified nano-silica. Sampling analysis: Make standard samples, and see Table 1 for their tested performance.

Embodiment 3

[0047] (1) Preparation of monomer pre-emulsion: the same as in Example 1.

[0048] (2) Preparation of mixed polar monomer mixture: the same as in Example 1.

[0049] (3) Preparation of modified nano-silica: take 100 parts of nano-silica (40nm) and 12 parts of polar monomer mixture a, 270 parts of deionized water, and 2.0 parts of sodium hydroxide into the polymerization kettle and stir. Mix for 20 minutes; then add 3 parts of sodium dodecylbenzene sulfonate and 2.5 parts of styrene pre-emulsion a, stir and heat up to 65°C, then stir and mix for 25 minutes to produce the seed of a composite emulsion centered on nano-silica powder ; Then add 18 parts of styrene pre-emulsion a and 0.13 parts of potassium persulfate, after reaction for 4.0h, finally add 0.2 parts of diethylhydroxylamine, washing, dehydration, drying, grinding to obtain modified nano-silica. Sampling analysis: Make standard samples, and see Table 1 for their tested performance.

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Abstract

The invention provides a modification method of highly dispersed nano white carbon black used as rubber filler. According to the method, unsaturated acrylate polar monomers and acrylamide polar monomers are compounded, arylethene monomers are pre-emulsified, and highly dispersed nano white carbon black is prepared with an in-situ polymerization method. The method not only solves the problem that nano white carbon black is prone to agglomeration, but also solves the problem that nano white carbon black is agglomerated again due to long-term storage, nano white carbon black is endowed with super dispersity, and long-term storage stability is guaranteed. The modification method has the characteristics that fewer monomers are used, environmental pollution is small, the operation method is simple, the method is suitable for industrial production, and the like.

Description

Technical field [0001] The invention relates to a preparation method of highly dispersed synthetic rubber filler nano white carbon black. Background technique [0002] As we all know, from the perspective of the expected effect of inorganic powder filled modified rubber, the smaller the particle size of the inorganic powder particles, the better the effect of modification. However, the application of ultrafine inorganic powder will inevitably A technical problem is encountered, that is, as the particle size decreases, the specific surface area of ​​the ultrafine powder increases, the surface energy increases, and the self-aggregating ability is stronger. The more difficult it is to be mixed, infiltrated and dispersed by the rubber material. Therefore, the dispersion of ultrafine inorganic powder in rubber has become a bottleneck for the preparation of high-performance rubber materials. [0003] Nano white carbon black is a porous material, and its composition can be SiO 2 ·NH 2 O ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C3/10C08F212/08C08F220/14C08F212/12C08F220/18C08F220/56
CPCC01P2006/19C01P2006/22C08F212/08C08F212/12C08F220/14C08F220/18C08F220/1804C09C1/28C09C3/10C08F220/56
Inventor 徐典宏牛承祥郭珺朱晶孟令坤赵洪国燕鹏华
Owner PETROCHINA CO LTD
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