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Amphiphilic copolymer dispersant, preparation method and application

An amphiphilic copolymer and dispersant technology, applied in chemical instruments and methods, chemical/physical processes, transportation and packaging, etc., can solve problems such as weak adsorption on the surface of solid particles, aggregation or precipitation of solid particles, and increased production costs , to achieve the effect of rich product types, easy operation and short production cycle

Active Publication Date: 2016-07-20
山东德胜精细化工研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of traditional small molecule dispersants is that the adsorption on the surface of solid particles is not firm, and it is easy to dissociate from the surface, resulting in re-agglomeration or precipitation of solid particles
[0005] Preparation of polymer dispersant The emulsion prepared by emulsion polymerization needs to be demulsified to obtain a solid dispersant, and the process is difficult to control; using an organic solvent as a solvent for solution polymerization requires recycling of the solvent, thus increasing production costs

Method used

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  • Amphiphilic copolymer dispersant, preparation method and application
  • Amphiphilic copolymer dispersant, preparation method and application
  • Amphiphilic copolymer dispersant, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Synthesis of methacrylic acid-isooctyl acrylate-hydroxyethyl acrylate copolymer

[0038] Put 220g 45% isopropanol aqueous solution into a 500mL four-necked flask with stirring, thermometer and reflux condenser, add 0.17g dodecanethiol and 0.80g polyvinyl alcohol, heat to reflux, reflux temperature is 82℃; add 59.8 g methacrylic acid, 10.6 g isooctyl acrylate, and 17.6 g hydroxyethyl acrylate are mixed uniformly to form a mixed monomer, 3.52 g sodium persulfate is dissolved in 84.0 g deionized water, and the initiator solution is mixed uniformly. At the reflux temperature, the above mixed monomer and initiator solution was added dropwise to the four-necked flask for 2 hours. After the addition, the reaction is continued for 2.5 hours. After the heat preservation, 122.0g of 20% sodium hydroxide solution is added dropwise, and the solvent is distilled off under reduced pressure to obtain a mixture of isopropanol and water. After the dealcoholization, the pH of the system i...

Embodiment 2

[0045] Put 220g of 50% isopropanol aqueous solution into a 500mL four-necked flask with stirring, thermometer and reflux condenser, add 0.17g of dodecanethiol and 0.80g of polyvinyl alcohol, and heat to reflux. The reflux temperature is 82℃; g methacrylic acid, 15.8 g isooctyl acrylate, and 19.4 g hydroxyethyl acrylate are mixed uniformly and made into a mixed monomer. Dissolve 3.60 g sodium persulfate in 84.0 g deionized water and mix well to make an initiator solution. At the reflux temperature, the above mixed monomer and initiator solution was added dropwise to the four-necked flask for 2 hours. After the addition, the reaction was continued for 2.5 hours. After the incubation, 107.7g of 20% sodium hydroxide solution was added dropwise, and the solvent was distilled off under reduced pressure to obtain a mixture of isopropanol and water. After the dealcoholization, the pH of the system was adjusted to 7~ 8. Add appropriate amount of water to adjust to a solid content of 35%...

Embodiment 3

[0048] In a 500mL four-necked flask with stirring, thermometer and reflux condenser, add 220g of 55% isopropanol aqueous solution, add 0.80g of polyvinyl alcohol, and heat to reflux. The reflux temperature is 82℃; 48.8g of methacrylic acid, 22.0 g Isooctyl acrylate and 17.6 g hydroxyethyl acrylate are mixed uniformly and made into a mixed monomer, 4.22g sodium persulfate is dissolved in 84.0g ionized water, mixed evenly to make an initiator solution, at the reflux temperature, The above-mentioned mixed monomer and initiator solution was added dropwise to the mouth flask, and the dropping time was 2h. After the addition, the reaction was continued for 2.5 hours. After the incubation, 99.8g of 20% sodium hydroxide solution was added dropwise, and the solvent was distilled off under reduced pressure to obtain a mixture of isopropanol and water. After the dealcoholization, the pH of the system was adjusted to 7~ 8. Add appropriate amount of water to adjust to a solid content of 35%...

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Abstract

The invention discloses amphiphilic copolymer dispersant, a preparation method and application.Firstly, a water-alcohol solution is configured, chain transfer and polyvinyl alcohol is added for preheating, then initiator, methacrylic acid, iso-octyl acrylate and a functional monomer are added, after a reaction is conducted, neutralization reagent with the carboxyl carboxyl being 80-100% is added, then pressure reduction, distillation and alcohol removal are conducted, and after pH is adjusted, liquid dispersant is obtained; the liquid dispersant is dried, and solid dispersant is obtained; the functional monomer is hydroxyethyl acrylate or sodium ethylenesulphonate or combination of the hydroxyethyl acrylate and the sodium ethylenesulphonate, and the functional monomer is composed of, by mass, 20-80 parts of methacrylic acid, 10-50 parts of iso-octyl acrylate, 10-40 parts of hydroxyethyl acrylate and 10-20 parts of sodium ethylenesulphonate.According to the preparation method, a water-alcohol system is adopted, distilled and recovered solvent can be directly used without being processed, emission of waste water, waste gas and solid waste is avoided, and the production cost is lowered.The dispersant prepared from the method is good in dispersing agent, and suspension percentage can reach 98.5%.

Description

Technical field [0001] The invention relates to a polymer dispersant, in particular to an amphiphilic copolymer dispersant, a preparation method and an application. Background technique [0002] The polymer dispersant is a product introduced in the last century. Due to its long molecular chain and steric hindrance, the dispersant can form a stable interaction with solid particles and enhance the dispersion stability of solid particles. Therefore, polymer dispersants are widely used in pigments, dyes, water reducing agents, pesticides and other fields. For example, in pesticide applications, in order to keep the original drug particles of environmentally friendly pesticide formulations (such as water dispersible granules) dispersed and stable in the aqueous solution, the dispersant must have hydrophilic groups and ensure that the dispersant and the original drug There is good "similar compatibility" between them, and lipophilic groups need to be added to improve the hydrophobicit...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F220/18C08F220/28C08F228/02B01F17/52C09K23/52
CPCC08F220/06C09K23/00C08F220/281C08F220/1808C08F228/02
Inventor 张磊王晨欧阳雷杜亚洲赵波
Owner 山东德胜精细化工研究院有限公司
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