Quadripolymer dispersant and preparation method thereof

A dispersant and polymer technology, which is applied in the field of tetrapolymer dispersant and its preparation, can solve the problems of weak ionization, lack of heterocyclic lipophilic groups, and environmental protection, and achieve good affinity, good adsorption performance, short cycle effect

Active Publication Date: 2014-10-08
中化化工科学技术研究总院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN102911321A reports a pesticide suspension agent dispersant. Although the dispersant has good solvent chains (polyoxyethylene or polyoxypropylene chains) and anionic groups (carboxylates), it lacks heterogeneous substances that are better adsorbed with the original drug. Cyclic lipophilic group; patent CN102308798A reports polymer dispersants whose polymerized monomers are allyl polyoxyethylene ether, styrene, etc., but only carboxylate is contained in the dispersant, and the degree of ionization is weak; patent CN101601381 It is reported that the polymerized monomers are 10%~80% unsaturated carboxylic acid, 0%~50% unsaturated carboxylic ester compound, 10%~40% styrene, sodium styrene sulfonate, allyl alcohol polyoxyethylene ether ( Polyoxyethylene repeating unit number 0-40) and other dispersants, the reaction medium uses a large amount of organic solvents and oil-soluble initiators, which is not environmentally friendly

Method used

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  • Quadripolymer dispersant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The preparation of embodiment 1 dispersant D1

[0018] (1) Add 160kg of water, 104kg of ether, and 80kg of methallyl alcohol polyoxyethylene ether into a reaction kettle equipped with a stirrer, thermometer, condenser and dropping equipment (the number of polyoxyethylene repeating units is 53±4.5, that is The molecular weight is 2400±200), 80kg hydroxyethyl methacrylate, 24kg styrene, 24kg sodium styrene sulfonate, heating while stirring;

[0019] (2) When the temperature rises to 80°C, add 27kg of 3.7% sodium persulfate solution dropwise for 1.0h, and keep warm for 2h after the addition;

[0020] (3) Cool to room temperature and adjust the pH to 6.5 with sodium hydroxide, which is the dispersant D1 of the present invention.

[0021] The number-average relative molecular weight of the dispersant measured by gel permeation chromatography is 23,000.

Embodiment 2

[0022] The preparation of embodiment 2 dispersant D2

[0023] In Example 1, methallyl alcohol polyoxyethylene ether (the number of polyoxyethylene repeating units is 53±4.5, that is, the molecular weight is 2400±200) is changed to allyl alcohol polyoxyethylene ether (the number of polyoxyethylene repeating units is 53±4.5 4.5, that is, the molecular weight is 2400±200), and other things remain unchanged, it is the dispersant D2 of the present invention.

[0024] The number-average relative molecular weight of the dispersant measured by gel permeation chromatography is 22,000.

Embodiment 3

[0025] The preparation of embodiment 3 dispersant D3

[0026] In Example 1, the ether was changed to ethanol, and 80kg of methallyl alcohol polyoxyethylene ether (the number of polyoxyethylene repeating units was 53±4.5, that is, the molecular weight was 2400±200) was changed to 40kg of methallyl alcohol polyoxyethylene ether (the number of polyoxyethylene repeating units is 53±4.5, that is, the molecular weight is 2400±200), 40kg of allyl alcohol polyoxyethylene ether (the number of polyoxyethylene repeating units is 53±4.5, that is, the molecular weight is 2400±200), other things remain unchanged, It is the dispersant D3 of the present invention.

[0027] The number-average relative molecular weight of the dispersant measured by gel permeation chromatography is 22,500.

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Abstract

The invention belongs to the field of polymeric dispersants and specifically relates to a quadripolymer dispersant and a preparation method thereof. The dispersant is formed by copolymerizing 30wt%-60wt% of unsaturated polyether, 10wt%-40wt% of hydroxyethyl methacrylate, 5wt%-15wt% of styrene and 5wt%-15wt% of sodium styrenesulfonate, based on 100% in total. The number-average relative molecular weight of the copolymer is 5000-50000; the dispersant can be widely applied to a formula of suspending agents of insecticides, herbicides and fungicides.

Description

technical field [0001] The invention belongs to the field of polymer dispersants, and in particular relates to a tetrapolymer dispersant and a preparation method thereof. Background technique [0002] Dispersant is a kind of surfactant with hydrophilic group and lipophilic group. It is a substance that can prevent the aggregation of solid or liquid particles in the dispersion system. It has been widely used in food, pesticides, coatings, dyes, construction and other fields. . Pesticide suspension concentrate is a viscous suspension preparation with high dispersion in water under the action of pesticide solid particles such as dispersant. The high dispersion of the suspending agent is mainly due to the role of the polymer dispersant. The dispersant structure contains strong lipophilic groups such as cycloalkyl groups, which can be well adsorbed on the surface of pesticide particles, which is conducive to the function of the dispersant; the polyoxyethylene ether chain can pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/28C08F212/08C08F212/14
Inventor 卢忠利张宗俭
Owner 中化化工科学技术研究总院有限公司
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