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A kind of polycarboxylate agricultural dispersant and preparation method thereof

A technology of dispersant and polycarboxylic acid, which is applied in the field of polycarboxylate agricultural dispersant and its preparation, can solve the problems of unsafe and environmental protection, and achieve the effect of good dispersion performance and simple process synthesis

Active Publication Date: 2021-04-16
北京凯贝瑞农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the original drug is generally an organic particle insoluble in water, the dispersant needs to contain lipophilic groups in the molecule in order to better absorb and disperse the original drug. The common lipophilic groups are styrene and acrylate, and these monomers are insoluble For water, the general process needs to use solvents, which is not environmentally friendly and safe

Method used

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  • A kind of polycarboxylate agricultural dispersant and preparation method thereof
  • A kind of polycarboxylate agricultural dispersant and preparation method thereof
  • A kind of polycarboxylate agricultural dispersant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A polycarboxylate agricultural dispersant, which consists of the following components in parts by weight: 66 parts of acrylic acid, 15 parts of propyl acrylate, 17 parts of allyloxy hydroxypropyl sodium sulfonate, and 5 parts of ammonium persulfate , 31 parts of sodium hydroxide, 200 parts of water.

[0027] The preparation method of above-mentioned polycarboxylate agricultural dispersant, concrete steps are as follows:

[0028] (1) 5g ammonium persulfate is poured into 7.5g water, is mixed with 40% initiator solution;

[0029] (2) Add 192.5 g of water into the reaction kettle, then add 17 g of sodium allyloxy hydroxypropyl sulfonate, 66 g of acrylic acid, and 15 g of propyl acrylate in sequence, and start stirring at a stirring speed of 900 rpm;

[0030] (3) Airtight, heat up to 85°C;

[0031] (4) dripping initiator solution, the dropping time is 0.5h;

[0032] (5) After the dropwise addition, continue to keep the temperature and stir for 1h;

[0033] (6) Cool, add...

Embodiment 2

[0037] A polycarboxylate agricultural dispersant, which consists of the following components in parts by weight: 61 parts of acrylic acid, 18 parts of ethyl acrylate, 19 parts of allyloxy hydroxypropyl sodium sulfonate, and 15 parts of ammonium persulfate , 29 parts of ammonia, and 150 parts of water.

[0038] The preparation method of above-mentioned polycarboxylate agricultural dispersant, concrete steps are as follows:

[0039] (1) 15g ammonium persulfate is poured into 29g water, is mixed with 34% initiator solution;

[0040] (2) Add 121g of water into the reaction kettle, then add 19g sodium allyloxy hydroxypropyl sulfonate, 61g acrylic acid, and 18g ethyl acrylate by weight in sequence, start stirring, and the stirring speed is 500 rpm;

[0041] (3) airtight and heat up to 95°C;

[0042] (4) dripping initiator solution, the dropping time is 3h;

[0043] (5) After the dropwise addition, continue to keep the temperature and stir for 1h;

[0044] (6) cooling, adding amm...

Embodiment 3

[0048] A polycarboxylate agricultural dispersant, which consists of the following components in parts by weight: 44 parts of acrylic acid, 27 parts of butyl acrylate, 28 parts of allyloxy hydroxypropyl sodium sulfonate, and 10 parts of sodium persulfate , 21 parts of sodium carbonate, and 200 parts of water.

[0049] The preparation method of above-mentioned polycarboxylate agricultural dispersant, concrete steps are as follows:

[0050] (1) 10g sodium persulfate is poured into 23g water, is mixed with 30% initiator solution;

[0051] (2) Add 177g of water to the reaction kettle, then add 28g of allyloxy hydroxypropyl sodium sulfonate, 44g of acrylic acid, and 27g of butyl acrylate in turn by weight, start stirring, and the stirring speed is 900 rpm;

[0052] (3) Airtight, heat up to 100°C;

[0053] (4) dripping initiator solution, the dropping time is 2h;

[0054] (5) After the dropwise addition, continue to keep the temperature and stir for 2h;

[0055] (6) Cool, add sod...

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Abstract

The invention discloses a polycarboxylate agricultural dispersant and a preparation method thereof, belonging to the technical field of agricultural adjuvants. A polycarboxylate agricultural dispersant disclosed by the invention consists of the following components in parts by weight: 25-70 parts of acrylic acid, 15-35 parts of acrylate, 15 parts of allyloxy hydroxypropyl sodium sulfonate ~35 parts, 5-15 parts of initiator, 15-35 parts of alkali, 100-200 parts of water. The polycarboxylate agricultural dispersant disclosed by the invention has a simple synthesis process, is environmentally friendly and has good dispersion performance.

Description

technical field [0001] The invention relates to the technical field of agricultural adjuvants, in particular to a polycarboxylate agricultural dispersant and a preparation method thereof. Background technique [0002] At present, pesticide formulations are formulations that use water as the carrier, such as water suspension concentrates, water dispersible granules, and the like. These pesticide formulations are inseparable from dispersants. Because polyacrylic acid dispersant has the characteristics of adjustable monomer and molecular weight, it is the most widely used one with the best performance. [0003] Since the original drug is generally an organic particle insoluble in water, the dispersant needs to contain lipophilic groups in the molecule in order to better absorb and disperse the original drug. The common lipophilic groups are styrene and acrylate, and these monomers are insoluble For water, the general process needs to use solvents, which is not environmentally...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F220/18C08F228/02A01N25/30
CPCA01N25/30C08F220/06C08F220/18C08F228/02
Inventor 李汉承
Owner 北京凯贝瑞农业科技有限公司
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