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A kind of nano silicon dioxide dispersant and its preparation method and application

A technology of nano-silica and dispersant, which is applied in the treatment of dyed polymer organic compounds, coatings, fibrous fillers, etc., and can solve the problems that coatings are easily affected by solvents, the preparation method is not simple enough, and the environmental protection performance of coatings is reduced. , to achieve the effect of being beneficial to later utilization, saving time and raw materials, and not easy to settle

Active Publication Date: 2015-11-18
广东精英无机材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] To sum up, there are few studies on nano-silica dispersant, and its dispersion effect is not very good, it is easy to settle, the preparation method is not simple enough, a large amount of organic solvent is needed in the manufacturing process, and the coating is easily affected by the solvent. , and the environmental performance of coatings containing a large amount of solvents is reduced

Method used

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  • A kind of nano silicon dioxide dispersant and its preparation method and application
  • A kind of nano silicon dioxide dispersant and its preparation method and application
  • A kind of nano silicon dioxide dispersant and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of nano silicon dioxide dispersant, comprising the following steps:

[0036] (1) In a 250mL four-neck flask equipped with a stirrer, dropping funnel, thermometer and reflux condenser, add 1.1 parts of crotonic acid, 1 part of sodium methacrylate, 0.55 parts of methyl crotonate and 0.04 parts of methacrylate Add 10 parts of distilled water to sodium bisulfate, stir to dissolve, and heat to 75°C.

[0037] (2) Then slowly add an aqueous solution containing 0.15 parts of ammonium persulfate at a speed of 1 drop / second, and the addition is completed within half an hour, then stop the reaction after holding the heat for 3 hours, and cool the polymer to 40°C.

[0038] (3) Slowly add NaOH solution with a mass fraction of 30% to make the pH of the system 8-9, and finally obtain a light yellow transparent liquid, that is, obtain nano-silica dispersant A.

Embodiment 2

[0040] A preparation method of nano silicon dioxide dispersant, comprising the following steps:

[0041] (1) In a 250mL four-neck flask equipped with a stirrer, dropping funnel, thermometer and reflux condenser, add 2.2 parts of crotonic acid, 1.5 parts of sodium methacrylate, 0.85 parts of methyl crotonate and 0.06 parts of methacrylate Add 15 parts of distilled water to sodium bisulfate, stir to dissolve, and heat to 85°C.

[0042] (2) Then slowly add ammonium persulfate (0.2 parts) aqueous solution dropwise, the speed is controlled at 1 drop / second, the dropwise addition is completed within half an hour, and then the reaction is stopped after 3.5 hours of heat preservation reaction, and the temperature of the polymer is lowered to 50°C.

[0043](3) Slowly add NaOH solution with a mass fraction of 30% to make the pH of the system 8-9, and finally obtain a light yellow transparent liquid, that is, nano-silica dispersant B.

Embodiment 3

[0045] A preparation method of nano silicon dioxide dispersant, comprising the following steps:

[0046] (1) In a 250mL four-neck flask equipped with a stirrer, dropping funnel, thermometer and reflux condenser, add 3.3 parts of crotonic acid, 2 parts of sodium methacrylate, 1.1 parts of methyl crotonate and 0.08 parts of methacrylate Sodium bisulfate, add water, stir to dissolve, and heat to 80°C.

[0047] (2) Then slowly add ammonium persulfate (0.25 parts) aqueous solution dropwise, the speed is controlled at 1 drop / second, the dropwise addition is completed within half an hour, and then the reaction is stopped after the heat preservation reaction for 2.5 hours, and the temperature of the polymer is lowered to 50°C.

[0048] (3) Slowly add NaOH solution with a mass fraction of 30% to make the pH of the system 8-9, and finally obtain a light yellow transparent liquid, that is, nano-silica dispersant C.

[0049] The infrared spectrum measurement result of embodiment 1 nano-s...

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Abstract

The invention discloses a nano-silica dioxide dispersant, a preparation method and application of the nano-silica dioxide dispersant and belongs to the field of coating pigment admixtures. The structure of the nano-silica dioxide dispersant prepared by the invention comprises high-molecular polymer of main and side chains. The nano-silica dioxide dispersant is copolymerized by crotonic acid, sodium methacrylate and methyl crotonate under the action of an initiator, wherein a molecule of the dispersant is of a dendritic structure. The dispersant is high in solid content, convenient to use and high in dispersion rate. The preparation method is simple and low in environmental pollution.

Description

technical field [0001] The invention belongs to the field of paint pigment additives, in particular to a nano-silica dispersant and its preparation method and application. Background technique [0002] Coatings are widely used and can be used in various buildings, industrial products and other important large-scale equipment. With the continuous increase of coating types and people's increasing demand for high-grade coatings, the application of additives in coatings has also attracted more and more attention. The development of the coatings industry requires the use of various new additives, among which dispersants are particularly important for coatings. [0003] There are two types of dispersants: traditional dispersants and new dispersants. Traditional dispersants include: fatty acids, aliphatic amides and esters, paraffins, metal soaps, molecular waxes (such as polyethylene, polypropylene, polyphenylene, etc.) vinyl), etc. A typical representative of a new type of dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/04C08F228/02C08F220/14C09D7/12C09C1/28C09C3/10
Inventor 王斌严杰庞浩刘伟区刘化珍区菊花郑景新蒋冰艳黄清泉
Owner 广东精英无机材料有限公司
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