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Methacrylic acid-styrene-hydroxyethyl acrylate copolymer dispersant and preparation method and application thereof

A technology of hydroxyethyl acrylate and methacrylic acid, which is applied to carboxylate polyelectrolyte dispersants and their preparation process and application fields, can solve problems such as weak adsorption, re-agglomeration or precipitation, and dissociation of particles, and achieve total Low activation energy, short cycle, good disintegration effect

Active Publication Date: 2014-02-26
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adsorption of traditional small molecule dispersants on the surface of solid particles is not strong, and they are easily dissociated from the surface, resulting in re-agglomeration or precipitation of particles

Method used

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  • Methacrylic acid-styrene-hydroxyethyl acrylate copolymer dispersant and preparation method and application thereof
  • Methacrylic acid-styrene-hydroxyethyl acrylate copolymer dispersant and preparation method and application thereof
  • Methacrylic acid-styrene-hydroxyethyl acrylate copolymer dispersant and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] 1) Preparation of dispersant

[0045] Weigh 5 parts of sodium lauryl sulfate, 1 part of thiourea, 100 parts of monomer mixture and 2 parts of rare earth complex (cerium chloride-2-isopropylthioxanthone complex) and add to 200 parts of Fully dissolved in acetone, the composition of the monomer mixture is 10 parts of styrene, 50 parts of methacrylic acid and 40 parts of hydroxyethyl acrylate; the prepared solution is placed in a photoreaction tube, placed in an ultrasonic cleaner for 10 minutes, and the ultrasonic wave ends Pass nitrogen into the photoreaction tube to remove the air, then put it into the photoreactor and irradiate it with an ultraviolet lamp for 60min at a temperature of 10°C; add appropriate amount of water and sodium hydroxide to the viscous solution obtained to neutralize 90% molar amount of Carboxylic acid, then evaporate acetone to obtain methacrylic acid-styrene-hydroxyethyl acrylate copolymer aqueous solution product, and spray dry to obtain white ...

Embodiment 2

[0065] Weigh 1 part of sodium lauryl sulfate, 5 parts of thiourea, 100 parts of monomer mixture and 5 parts of rare earth complexes (cerium chloride-anthraquinone complex) and add them to 200 parts of n-hexane in order to fully dissolve, The composition of the monomer mixture is 30 parts of styrene, 50 parts of methacrylic acid and 20 parts of hydroxyethyl acrylate; the prepared solution is filled in a photoreaction tube, placed in an ultrasonic cleaner for 10 minutes of ultrasonic cleaning, and the photoreaction tube Nitrogen was passed through the middle to remove the air, and then placed in a photoreactor to irradiate with a UV lamp for 30 minutes at a temperature of 20°C; an appropriate amount of water and ammonia were added to the obtained viscous solution to neutralize 80% of the molar amount of carboxylic acid, and then the n-hexane was distilled off. alkane to obtain a methacrylic acid-styrene-hydroxyethyl acrylate copolymer aqueous solution product, and spray drying to...

Embodiment 3

[0072] Weigh 5 parts of calcium dodecylbenzenesulfonate, 10 parts of thiourea, 100 parts of monomer mixture and 10 parts of rare earth complex (cerium chloride-benzophenone complex) and add them to 200 parts of acetone in sequence Fully dissolved, the composition of the monomer mixture is 30 parts of styrene, 40 parts of methacrylic acid and 30 parts of hydroxyethyl acrylate; the prepared solution is placed in a photoreaction tube, placed in an ultrasonic cleaner for 10 minutes, and after the ultrasonic cleaning is completed, the Nitrogen was passed through the photoreaction tube to remove the air, and then put into the photoreactor to irradiate with a UV lamp for 120min at a temperature of 25°C; an appropriate amount of water, sodium hydroxide and diethylamine were added to the obtained viscous solution to neutralize 60% of the molar amount Carboxylic acid, then distill off acetone to obtain methacrylic acid-styrene-hydroxyethyl acrylate copolymer dispersant aqueous solution p...

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Abstract

The invention relates to a methacrylic acid-styrene-hydroxyethyl acrylate copolymer dispersant and a preparation method and application thereof. The methacrylic acid-styrene-hydroxyethyl acrylate copolymer dispersant is synthesized with styrene, methacrylic acid and hydroxyethyl acrylate as monomers, and cerous chloride-2-isopropyl-thioxanthone complex, cerous chloride-anthraquinone complex or cerous chloride-diphenyl ketone complex as a photoinitiator through photo initiated radical copolymerization. The dispersant provided by the invention can have a good dispersion effect on inorganic powder and pesticide preparations, and can be compounded with a wetter to take good dispersion effect on pesticide water-borne preparations.

Description

technical field [0001] The invention relates to a carboxylate polyelectrolyte dispersant and its preparation process and application, in particular to a carboxylate terpolymer dispersant (methacrylic acid-benzene Ethylene-hydroxyethyl acrylate copolymer dispersant) and its preparation process and application. Background technique [0002] Dispersants have important applications in pigments, dyes, pesticides and other industries, and play a role in dispersing and stabilizing the dispersed substances. The adsorption of traditional small molecule dispersants on the surface of solid particles is not strong, and they are easily dissociated from the surface, resulting in re-agglomeration or precipitation of particles. Carboxylate copolymer dispersants stabilize the system through steric hindrance and electrostatic repulsion. Compared with small molecule dispersants, it has a better dispersion effect; compared with lignosulfonate and naphthalenesulfonate formaldehyde condensate d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F212/08C08F220/28C08F2/48C08F2/44B01F17/34A01N25/04A01N25/30C09C3/10C09C1/02C09C1/36C09K23/34
Inventor 任天瑞秦跃军邢雯安珂
Owner SHANGHAI NORMAL UNIVERSITY
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