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Agricultural preparation dispersing agent and preparation method and application thereof

A technology of dispersant and preparation, applied in the field of agricultural preparation dispersant and its preparation, can solve problems such as flocculation and paste, achieve high suspension rate, improve thermal storage stability, and inhibit Ostwald ripening effects

Inactive Publication Date: 2020-12-01
上海科沣新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using active components with low solubility and low melting point that are difficult to disperse, conventional dispersants usually have unstable factors such as flocculation and creaming

Method used

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  • Agricultural preparation dispersing agent and preparation method and application thereof
  • Agricultural preparation dispersing agent and preparation method and application thereof
  • Agricultural preparation dispersing agent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 300g cresol (industrial grade, containing 40% m-cresol) mixed with 400g sodium sulfite crystals, 400g 30% formaldehyde solution and 500g water, then filled the condenser with nitrogen, then started stirring and refluxed at 100°C for 11 hours. After the reaction was completed, it was diluted with 115 g of water at 80° C. and neutralized with sulfuric acid to obtain an aqueous dispersant solution with a pH of 8.

Embodiment 2

[0042] 320g of cresol (industrial grade, containing 40% m-cresol) was mixed with 420g of sodium sulfite crystals, 400g of 30% formaldehyde solution and 500g of water, and the reaction vessel was filled with nitrogen, then stirred at 120 degrees centigrade for condensation reaction for 11 hours. After completion of the reaction, dilute with 116g of water at 80°C to obtain an aqueous dispersant solution with a pH of 10.

Embodiment 3

[0044] With 302g cresol (industrial grade, including 40% m-cresol), 16g nonylphenol, 528g sodium sulfite and 500g 30% formaldehyde aqueous solution, add 300g water and mix, protect with nitrogen and heat 102 ℃ to 105 ℃ for 6 hours. The mixture is cooled to 80 degrees centigrade and added with 645g water for dilution, neutralized with sulfuric acid to obtain a pH7.2 dispersant aqueous solution, or dried into a solid powder using a spray tower.

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Abstract

The invention provides an agricultural preparation dispersing agent and a preparation method and application thereof. The dispersing agent is one or more of structural formulas (I), (II) and (III), wherein R1 and R2 are selected from H and alkyl groups from C1 to C12; X is-O <->,-CH < 2->,-CH < 2 > CH < 2-> or-CH < 2 > CH < 2 > CH < 3->; Y and Z are selected from SO<3-> or CH<2>SO<3->; Me is a hydrogen cation, an alkali metal cation, an alkaline earth metal cation or an ammonium cation; m and n respectively represent numbers 0, 1 or 2, and m + n is at least 1. Compared with the existing dispersing agent, the agricultural preparation dispersing agent has higher suspension rate and heat storage stability, can effectively inhibit Ostwald ripening, has a wide dispersing and stabilizing effecton special unstable crystal form active ingredients, and has high suspension rate when being used for diluting a pesticide preparation.

Description

technical field [0001] The invention belongs to the field of dispersants, in particular to a dispersant for agricultural preparations and its preparation method and application. Background technique [0002] Most of the active ingredients of pesticides are hydrophobic or insoluble in water. In order to make better use of the active ingredients, additives or dispersants are usually needed to help the active ingredients to effectively disperse in the aqueous medium for application. Most of the original drugs need to be processed into concentrated preparations such as suspension concentrates, wettable powders, and water-dispersible granules. [0003] As policies and regulations promote the development of water-based system preparations, some active substances with low water solubility (slightly soluble in hydrophobicity) and low melting point have problems. Of course, patented compounds are gradually decreasing, and preparations contain multiple active ingredients to compound,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C309/42C07C309/24C07C303/32A01N25/04A01N25/14A01N47/30A01N43/70A01N43/653A01N47/34A01N51/00A01N47/24A01N47/38A01P21/00A01P1/00A01P3/00A01P7/00
CPCC07C309/42C07C309/24C07C303/32A01N25/04A01N25/14A01N47/30A01N43/70A01N43/653A01N47/34A01N51/00A01N47/24A01N47/38
Inventor 顾必文顾奕通
Owner 上海科沣新材料有限公司
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