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Modification method of nanometer white carbon black

A nano-silica, modification technology, applied in the field of preparation of modified synthetic rubber filler nano-silica to achieve ultra-dispersion, can solve problems such as easy agglomeration

Active 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 nanometer white carbon black
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  • Modification method of nanometer white carbon black

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of monomer pre-emulsion: 100 parts of isoprene, 5 parts of sodium dodecylbenzenesulfonate, 150 parts of deionized water, 1.0 part of sodium hydroxide, and 0.01 part of ammonium persulfate were put together In the reactor, when the temperature was raised to 40° C., the reaction was stirred for 40 minutes to prepare isoprene pre-emulsion a.

[0034] (2) Preparation of compound polar monomer mixture: put 100 parts of acrylic acid (AA) and 20 parts of acrylamide into the reactor and stir and mix for 5 minutes, then add 50 parts of deionized water and 1.0 part of sodium hydroxide, and then Stir and mix for 10 minutes to form the compound polar monomer mixture a. (pH of the mixture a=7.6)

[0035] (3) Preparation of modified nano-silica: Take 100 parts of nano-silica (40nm) and 10 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 20 minutes; then add 1 part of sodi...

Embodiment 2

[0037] (1) Preparation of monomer pre-emulsion: with embodiment 1.

[0038] (2) Preparation of compounded polar monomer mixture: same as in Example 1.

[0039] (3) Preparation of modified nano-silica: 100 parts of nano-silica (40nm) and 15 parts of polar monomer mixture a, 270 parts of deionized water, and 1.7 parts of sodium hydroxide are added to the polymerization kettle and stirred Mix for 20 minutes; then add 2 parts of sodium dodecylbenzenesulfonate and 2.0 parts of isoprene pre-emulsion a, stir and heat up to 65°C, then stir and mix for 25 minutes to form a composite emulsion centered on nano-silica powder Then add 40 parts of isoprene pre-emulsion a and 0.09 parts of ammonium persulfate, after reacting for 4.0 hours, finally add 0.2 parts of diethylhydroxylamine, wash, dehydrate, dry and grind to obtain modified nano Silica. Sampling and analysis: standard samples were made, and the tested properties are shown in Table 1.

Embodiment 3

[0041] (1) Preparation of monomer pre-emulsion: with embodiment 1.

[0042] (2) Preparation of compounded polar monomer mixture: same as in Example 1.

[0043] (3) Preparation of modified nano-silica: 100 parts of nano-silica (40nm) and 18 parts of polar monomer mixture a, 270 parts of deionized water, and 1.9 parts of sodium hydroxide are added to the polymerization kettle and stirred Mix for 20 minutes; then add 2 parts of sodium dodecylbenzenesulfonate and 2.5 parts of isoprene pre-emulsion a, stir and heat up to 65°C, and then stir and mix for 25 minutes to form a composite emulsion centered on nano-silica powder Then add 43 parts of isoprene pre-emulsion a and 0.09 parts of ammonium persulfate, after reacting for 4.0 hours, finally add 0.2 parts of diethylhydroxylamine, wash, dehydrate, dry and grind to obtain modified 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 provides a modification method of highly dispersive white carbon black used as rubber filler. An unsaturated carboxylic acid polar monomer and an acrylamide polar monomer are compounded, a conjugated diene monomer is subjected to pre-emulsification treatment, and the highly dispersive white carbon black is prepared with an in-situ polymerization method. With adoption of the method, the problem of easy agglomeration of the nanometer white carbon black is solved, the nanometer white carbon black is endowed with super-dispersibility, the problem of re-agglomeration caused by long-term storage is also solved, and long-term storage stability is guaranteed. The method has the characteristics of being small in consumption of monomers, little in environment pollution, simple to operate, suitable for industrial production and the like.

Description

technical field [0001] The invention relates to a preparation method for modifying synthetic rubber filler nano-white carbon black to achieve super-dispersibility. Background technique [0002] As we all know, from the perspective of the expected effect of inorganic powder filling modified rubber, the smaller the particle size of the inorganic powder particles, the better the effect of modification, but it is inevitable in the application process of ultrafine inorganic powder Encountered a technical problem, that is, as the particle size decreases, the specific surface area of ​​ultrafine powder increases, the surface energy increases, and the self-aggregation ability is stronger, so it is more difficult for the ultrafine powder to be mixed, infiltrated and dispersed by rubber materials. Therefore, the dispersion of ultrafine inorganic powder in rubber has become a bottleneck in the preparation of high-performance rubber materials. [0003] Nano-silica is a porous substance...

Claims

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Application Information

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IPC IPC(8): C08K9/10C08K9/04C08K3/36C08L21/00C08F220/06C08F236/08C08F220/56C08F2/26C08F2/44
CPCC08F2/26C08F2/44C08F220/06C08F236/08C08K3/36C08K9/04C08K9/10C08K2201/005C08K2201/011C08L21/00C08F220/56
Inventor 李晶郭珺朱晶孟令坤蔡文婧丛日新郑红兵
Owner PETROCHINA CO LTD
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