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Modification method of nanometer white carbon black

A nano-silica and modification technology, which is applied in the field of preparation of high-dispersion synthetic rubber filler nano-silica modification, can solve the problems of complicated operation, high production cost, poor dispersion stability and the like

Active Publication Date: 2019-06-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods have improved the dispersion of nano-silica particles and enhanced the compatibility with the rubber matrix, these methods still have certain limitations. Using graft polymer modification and inorganic material surface coating to modify nano When using silica, there are disadvantages such as long reaction time, high energy consumption, and complicated operation; while using coupling agent or surfactant to modify nano-silica, there are also large dosage, high production cost, and poor dispersion stability. Easy to reunite and other disadvantages

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Preparation of monomer pre-emulsion: put 100 parts of styrene, 2.0 parts of sodium dodecylbenzenesulfonate, 200 parts of deionized water, 1.0 parts of sodium hydroxide, and 0.01 parts of potassium persulfate into the reactor , when the temperature was raised to 50°C, the reaction was stirred for 30 minutes to prepare styrene pre-emulsion a.

[0037] (2) Preparation of modified nano-silica: 100 parts of nano-silica (40nm), 1.0 part of acrylic acid (AA), 300 parts of deionized water, and 1.0 part of sodium hydroxide were added to the polymerization tank and stirred for 20 minutes; Then add 1.0 parts of sodium dodecylbenzenesulfonate and 1.5 parts of styrene pre-emulsion a, stir and heat up to 65 ° C, and then stir and mix for 20 minutes to generate the seeds of the composite emulsion centered on nano-silica powder; then Add 20 parts of styrene pre-emulsion a and 0.05 part of potassium persulfate, react for 3.0 hours, finally add 0.1 part of diethylhydroxylamine, wash,...

Embodiment 2

[0039] (1) Preparation of monomer pre-emulsion: with embodiment 1.

[0040] (2) Preparation of modified nano-silica: 100 parts of nano-silica (40nm), 2.2 parts of acrylic acid (AA), 350 parts of deionized water, and 2.0 parts of sodium hydroxide were added to the polymerization kettle and stirred for 20 minutes; Then add 2.5 parts of sodium dodecylbenzenesulfonate and 2.0 parts of styrene pre-emulsion a, stir and heat up to 65 ° C, and then stir and mix for 25 minutes to generate the seeds of the composite emulsion centered on nano-silica powder; then Add 25 parts of styrene pre-emulsion a and 0.09 part of potassium persulfate, react 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

[0042] (1) Preparation of monomer pre-emulsion: put 100 parts of styrene, 5 parts of sodium dodecylbenzenesulfonate, 240 parts of deionized water, 1.5 parts of sodium hydroxide, and 0.05 parts of potassium persulfate into the reactor , when the temperature was raised to 55°C, the reaction was stirred for 40 minutes to prepare styrene pre-emulsion b.

[0043] (2) Preparation of modified nano-silica: 100 parts of nano-silica (40nm), 2.5 parts of acrylic acid (AA), 370 parts of deionized water, and 2.5 parts of sodium hydroxide were added to the polymerization tank and stirred for 25 minutes; Then add 3 parts of sodium dodecylbenzenesulfonate and 2.5 parts of styrene pre-emulsion b, stir and heat up to 65 ° C, and then stir and mix for 25 minutes to generate the seeds of the composite emulsion centered on nano-silica powder; then Add 30 parts of styrene pre-emulsion b and 0.12 parts of potassium persulfate, react for 4.0 hours, finally add 0.25 parts of diethylhydroxylamine, wash...

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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, highly dispersed nano white carbon black is prepared from unsaturated carboxylic acid polar monomers and arylethene monomers with an in-situ polymerization method. The method solves the problem that nano white carbon black is prone to agglomeration, and nano white carbon black is endowed with high dispersity. The modification method has the characteristics that fewer arylethene 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 for modifying nano-white carbon black of highly dispersed synthetic rubber filler. 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, and its co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08K9/04C08K3/36C08L21/00C08F212/08C08F220/06C08F222/06C08F2/26C08F2/44
CPCC08F212/08C08K3/36C08K9/04C08K9/10C08K2201/005C08K2201/011C08L21/00C08F220/06C08F222/06C08F2/26C08F2/44
Inventor 梁滔丛日新郭珺朱晶孟令坤蔡文婧燕鹏华
Owner PETROCHINA CO LTD
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