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Methacrylic acid-styrene copolymer dispersing agent, preparation method and application thereof

A technology of styrene copolymer and methacrylic acid, applied in the field of light-initiated methacrylic acid and styrene copolymer dispersant and preparation, carboxylate copolymer, which can solve the problem of weak adsorption, re-aggregation or precipitation of solid particles , no problems, etc., to achieve the effect of low total activation energy, pure product and low cost

Active Publication Date: 2012-07-04
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of traditional small molecule dispersants are: the adsorption on the surface of solid particles is not firm, and it is easy to dissociate from the surface to cause re-aggregation or precipitation
But there is no report of light-induced synthesis of methacrylic acid and styrene copolymer dispersant

Method used

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  • Methacrylic acid-styrene copolymer dispersing agent, preparation method and application thereof
  • Methacrylic acid-styrene copolymer dispersing agent, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Preparation of dispersant:

[0026] The mass ratio of methacrylic acid and styrene is 2: 1, and the total monomer is 20 g; sodium lauryl sulfate and polyethylene glycol octyl phenyl ether are used as surfactants in a weight ratio of 5: 1, and the dosage is unit 4% of the monomer; thiourea is an anti-crosslinking agent, and the consumption is 4% of the monomer; the photoinitiator consumption is 4% of the monomer; the solution is prepared as a solvent with ethanol, and the solvent consumption is equal to the monomer mass. Take 10ml of the solution in the photoreaction tube, put nitrogen into the photoreaction tube to discharge the air, and cover it; then put the photoreaction tube into a photoreactor at 15°C and irradiate it with a UV lamp for 50 minutes; a light yellow transparent viscous polymer is formed Add a triethylamine solution to neutralize 40%; remove the organic solvent, use an aqueous dispersant, and spray dry to obtain a white powder.

[0027] Wherein, ph...

Embodiment 2

[0046] The mass ratio of methacrylic acid and styrene is 7: 2.5, and the total monomer is 20 g; sodium lauryl sulfate and polyethylene glycol octyl phenyl ether are surfactants with a weight ratio of 4: 1, and the dosage is unit 5% of the total amount of the monomer; thiourea is an anti-crosslinking agent, and the amount is 9% of the monomer; the amount of the photoinitiator is 4% of the monomer; chloroform is used as a solvent to make a solution for later use, and the amount of the solvent is equal to the mass of the monomer . Take 10ml of the solution in the photoreaction tube, put nitrogen into the photoreaction tube to discharge the air, and cover it; then put the photoreaction tube into a photoreactor at 15°C and irradiate it with a UV lamp for 50 minutes; a light yellow transparent viscous polymer is formed Material dispersant, add sodium hydroxide solution to neutralize 30%. After removing the organic solvent, an aqueous solution is obtained.

[0047] Wherein, the pho...

Embodiment 3

[0051] The mass ratio of methacrylic acid and styrene is 9: 1, and the total monomer is 20 g; sodium lauryl sulfate and polyethylene glycol octyl phenyl ether are used as surfactants in a weight ratio of 3: 1, and the dosage is unit 9% of the monomer; thiourea is an anti-crosslinking agent, and the consumption is 7% of the monomer; the photoinitiator consumption is 2% of the monomer; acetone is used as a solvent to make a solution for later use, and the solvent consumption is equal to the monomer mass. Take 10ml of the solution in the photoreaction tube, pass nitrogen into the photoreaction tube to discharge the air, and cover it; then put the photoreaction tube into a photoreactor at 20°C and irradiate it with a UV lamp for 100 minutes; a light yellow transparent viscous polymer is formed Add ammonia water to neutralize 90%; remove the organic solvent to obtain a water solution, and obtain a white powder after spray drying.

[0052] Wherein, the photoinitiator is lanthanum ni...

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Abstract

The present invention relates to a copolymer dispersing agent, and discloses a methacrylic acid-styrene copolymer dispersing agent. According to the dispersing agent, methacrylic acid and styrene are adopted as monomers, a surfactant, an anti-cross-linking agent, a photoinitiator and a neutralization reagent are added, and a photo-initiation method is adopted to prepare the methacrylic acid-styrene copolymer dispersing agent. According to the method, the total activation energy is low, the polymerization can be performed at a low temperature, and advantages of simple process, high product purity, and the like are provided. The obtained dispersing agent provides good dispersing effects for inorganic powder and pesticides, can be used for preparations of aqueous pesticide preparations, and can be widely used in fields of the pesticide preparations and the like. The method of the present invention has characteristics of low cost and no pollution, and is suitable for the large-scale industrial production.

Description

technical field [0001] The invention relates to a copolymer dispersant, specifically a carboxylate copolymer, which is a photoinitiated methacrylic acid and styrene copolymer dispersant, as well as its preparation technology and application. Background technique [0002] Dispersants have important applications in pigments, dyes, pesticides and other industries. The disadvantages of traditional small molecule dispersants are: the adsorption on the surface of solid particles is not firm, and it is easy to dissociate from the surface to cause re-aggregation or precipitation. Cationic dispersants are prone to precipitation and become ineffective when used in hard water conditions. Carboxylate copolymer dispersants can stabilize the system through steric hindrance and electrostatic repulsion, and have better dispersion effects than small molecule and cationic dispersants. [0003] Our research group has synthesized a tribasic carboxylate dispersant with excellent dispersion eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F212/08C08F2/48A01N25/30A01N25/14A01N43/70A01P13/00B01F17/52C09K23/52
Inventor 任天瑞彭彤张雷南士彬邢雯
Owner SHANGHAI NORMAL UNIVERSITY
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