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High magnification hard water resistant dispersant, and preparation method and application thereof

A dispersant and hard water technology, applied in the field of polymer compound preparation, can solve the problems of high product yield, inability to effectively reduce the relative molecular weight distribution width, uneven molecular weight distribution of the dispersant, etc., and achieve stable dispersion performance and narrow molecular weight distribution range. , the effect of preventing particle agglomeration

Pending Publication Date: 2019-10-22
YANGZHOU SPED CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problem of uneven relative molecular weight distribution of the above-mentioned existing dispersants, the present invention provides an anti-high-power hard water dispersant with uniform molecular weight distribution;
[0012] At the same time, in view of the problem that the above-mentioned existing dispersant preparation method cannot effectively reduce the relative molecular weight distribution width, the present invention discloses a preparation method of a high-power hard water dispersant, which is simple and has high product yield;

Method used

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  • High magnification hard water resistant dispersant, and preparation method and application thereof
  • High magnification hard water resistant dispersant, and preparation method and application thereof
  • High magnification hard water resistant dispersant, and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0063] The specific structural formula of the polymer dispersant PC-1 provided in the present embodiment is as follows:

[0064]

[0065] The preparation steps of above-mentioned polymer dispersant PC-1 are as follows:

[0066] (1) Use acetone as a solvent to configure dimethyl azobisisobutyrate solution (0.38g dimethyl azobisisobutyrate is dissolved in 25g acetone), and a mixed solution of methyl acrylate and 1-octene (acrylic acid Methyl ester 43g, 1-octene 22.4g);

[0067] (2) Add 3.9 g of S, S-dibenzyl trithiocarbonate, 19.6 g of maleic anhydride, 0.13 g of Dimethyl azodiisobutyrate and 60g of acetone, in N 2 Under the atmosphere, heat to 62°C and continue stirring for 55 minutes;

[0068] (3) The constant flow pump works, and starts to add dropwise the dimethyl azobisisobutyrate solution and the mixed solution of methyl acrylate and 1-octene, and the dimethyl azobisisobutyrate solution is added dropwise in 3 hours. The mixed solution of methyl acrylate and 1-octene...

Embodiment 2

[0073] The specific structural formula of the polymer dispersant PC-2 provided in the present embodiment is as follows:

[0074]

[0075] The preparation steps of above-mentioned polymer dispersant PC-2 are as follows:

[0076] (1) Use butanone as a solvent to configure azobisisobutyronitrile solution (0.37g dimethyl azobisisobutyrate is dissolved in 30g butanone), and a mixed solution of methyl methacrylate and styrene (methyl Methyl acrylate 50g, styrene 20.8g);

[0077] (2) Add 4.3 g of S, S'-bis(2-methyl-2-propionyl) trithiocarbonate, 18g of acrylic acid, 0.12g of azobisisobutyronitrile and 65g of methyl ethyl ketone, in N 2 Under atmosphere, heat to 70°C and continue to stir for 1h;

[0078] (3) The constant flow pump works, and starts to drip the mixed solution of azobisisobutyronitrile solution and methyl methacrylate and styrene, and the azobisisobutyronitrile solution is added dropwise in 3.5 hours, and methyl methacrylate and The mixed solution of styrene was ad...

Embodiment 3

[0083] The specific structural formula of the polymer dispersant PC-3 provided in the present embodiment is as follows:

[0084]

[0085] The preparation steps of above-mentioned polymer dispersant PC-3 are as follows:

[0086] (1) take isopropanol as solvent configuration dibenzoyl peroxide solution (0.36g dibenzoyl peroxide is dissolved in 25g isopropanol), and the mixed solution of acrylate-2-hydroxyethyl ester and acrylamide ( 2-hydroxyethyl acrylate 58g, acrylamide 10.6g);

[0087] (2) Add 4.1 g of S, S'-bis(α-hydroxyethyl isobutyrate) trithiocarbonate, 19.5 g Itaconic acid, 0.12g of dibenzoyl peroxide and 70g of isopropanol, in N 2 Under atmosphere, heat to 85°C and continue to stir for 30 minutes;

[0088] (3) The constant flow pump works, and starts to drop dibenzoyl peroxide solution and a mixed solution of 2-hydroxyethyl acrylate and acrylamide. The dibenzoyl peroxide solution is added dropwise in 4 hours, and the acrylic acid-2 - The mixed solution of hydroxy...

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Abstract

The invention discloses a high magnification hard water resistant dispersant, and a preparation method and application thereof, and belongs to the field of high-molecular compound preparation. An organic acid containing functionalized carboxylic acid and vinyl monomers are copolymerized by taking trisulfide with a symmetrical structure as an RAFT reagent and taking azo or peroxide as an initiatingagent to synthesize an ABA type block copolymer polymer dispersant; the ABA type block copolymer polymer dispersant is applied to triazobenzene water dispersible granules; in a processing process ofthe triazobenzene water dispersible granules, the triazobenzene water dispersible granules have higher dispersibility and persistent stability in high magnification hard water through a steric-hinerance effect and electrostatic repulsion of the high-molecular dispersant.

Description

technical field [0001] The invention relates to the field of polymer compound preparation, more specifically to an anti-highly hard water dispersant and its preparation method and application. Background technique [0002] A series of herbicides such as atrazine, atrazine and simazine have similar chemical structures and are widely used in the world. Pesticides rarely use the original drug in the process of use. Generally, the active ingredients of the pesticide are mixed with one or more auxiliary agents to prepare a stable dosage form, and then packaged and sold on the market. For example, the dosage forms that can be used for spraying include water, EC, wettable powder, soluble concentrate, suspension concentrate, water dispersible granule, etc. As a new generation of water-based preparations, water-dispersible granules have high content of active ingredients, no dust flying when used, good physical and chemical storage stability, high specific gravity, small packaging v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00C08F2/38A01N25/04
CPCC08F293/005C08F2/38A01N25/04C08F2438/03Y02A50/30
Inventor 余鹏程龙跃君沈姣姣周嘉源秦敦忠
Owner YANGZHOU SPED CHEM
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