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Long-actingsterilizing agent based on disodium hydrogen phosphate

A technology of disodium hydrogen phosphite and fungicides, applied in biocides, plant growth regulators, plant growth regulators, etc., can solve the problems of limiting the antibacterial application of chitosan, and achieve improved crop quality, good bactericidal effect, The effect of long sterilization time

Inactive Publication Date: 2022-02-08
如东振丰奕洋化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chitosan can only be dissolved in acidic solutions with pH less than 6.5, which limits the antibacterial application of chitosan

Method used

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  • Long-actingsterilizing agent based on disodium hydrogen phosphate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Dilute 80 g of molecular weight to 1×10 4 Dissolve chitosan in acetic acid solution with a mass concentration of 2%, filter out incompatible substances, adjust pH to 5 with 1M NaOH solution to obtain chitosan solution, dissolve 1 g disodium hydrogen phosphite in water to obtain phosphorous acid Hydrogen disodium solution, 40 g poloxamer is dissolved in water to obtain a mass concentration of 20% carrier solution;

[0027] (2) Add the disodium hydrogen phosphite solution into the chitosan solution, stir for 20 min, adjust the pH to neutral, and completely precipitate the precipitate, then continue to stir for 10 min, let it stand for aging, filter, wash with water, and filter to obtain Bactericidal body;

[0028] (3) Add the bactericidal body into the carrier solution, stir, homogenize, and then spray dry to obtain a long-acting bactericide based on disodium hydrogen phosphite.

Embodiment 2

[0030] (1) The molecular weight of 100 g is 3×10 4 Dissolve chitosan in acetic acid solution with a mass concentration of 2%, filter out incompatible substances, adjust pH to 6 with 1M NaOH solution to obtain chitosan solution, dissolve 1 g disodium hydrogen phosphite in water to obtain phosphorous acid Hydrogen disodium solution, 80 g povidone is dissolved in water and obtains mass concentration and is the carrier solution of 30%;

[0031] (2) Add the disodium hydrogen phosphite solution into the chitosan solution, stir for 30 min, adjust the pH to neutral, and make the precipitation complete, then continue to stir for 20 min, let it stand for aging, filter, wash with water, and filter to obtain Bactericidal body;

[0032] (3) Add the bactericidal body into the carrier solution, stir, homogenize, and then spray dry to obtain a long-acting bactericide based on disodium hydrogen phosphite.

Embodiment 3

[0034] (1) The molecular weight of 110 g is 8×10 4 Dissolve chitosan in acetic acid solution with a mass concentration of 2%, filter out incompatible substances, adjust pH to 5.5 with 1M NaOH solution to obtain chitosan solution, dissolve 1 g of disodium hydrogen phosphite in water to obtain phosphorous acid Sodium hydrogen disodium solution, 110 g hydroxypropyl cellulose is dissolved in water and obtains the carrier solution that mass concentration is 25%;

[0035] (2) Add the disodium hydrogen phosphite solution into the chitosan solution, stir for 40 min, adjust the pH to neutral, and completely precipitate the precipitate, then continue to stir for 30 min, let it stand for aging, filter, wash with water, and filter to obtain Bactericidal body;

[0036] (3) Add the bactericidal body into the carrier solution, stir, homogenize, and then spray dry to obtain a long-acting bactericide based on disodium hydrogen phosphite.

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Abstract

The invention belongs to the technical field of bactericides, and particularly relates to a long-acting sterilizing agent based on disodium hydrogen phosphate, which is prepared by the following steps: (1) dissolving chitosan in an acid solution to obtain a chitosan solution, dissolving disodium hydrogen phosphate in water to obtain a disodium hydrogen phosphate solution, and dissolving a water-soluble carrier in water to obtain a carrier solution; (2) adding the disodium hydrogen phosphate solution into the chitosan solution, stirring for 20-40 minutes, adjusting the pH value to be neutral, continuously stirring for 10-30 minutes, standing, aging, filtering, washing with water, and filtering to obtain a sterilizing body; and (3) adding the sterilizing body into the carrier solution, stirring, homogenizing, and spray-drying to obtain the long-acting sterilizing agent. The chitosan and the disodium hydrogen phosphate are mixed in a solution state, so that the disodium hydrogen phosphate is better dispersed in the chitosan, slow release of the disodium hydrogen phosphate is facilitated, and sodium ions in the disodium hydrogen phosphate can improve the antibacterial effect of the chitosan; the water-soluble carrier is used for dispersing the sterilizing body, so that the solubility of the sterilizing body can be improved, and the sterilization effect can be better played.

Description

technical field [0001] The application belongs to the technical field of fungicides, in particular to a long-acting fungicide based on disodium hydrogen phosphite. Background technique [0002] Phosphite as a fungicide originally originated from phosphonium aluminum developed by Bayer in Germany. Later, with the expiration of the patent term for the active ingredient of phosphite, many foreign companies began to produce biocides with phosphite as the main component. As the main product in phosphite, disodium hydrogen phosphite has a certain bactericidal effect, which can stimulate plants to improve resistance to diseases and enhance disease resistance. It can be used as a systemic fungicide, but the bactericidal effect is relatively limited . [0003] Chitosan is a product of deacetylation of chitin, which has various physiological functions such as biodegradability, biocompatibility, non-toxicity, antibacterial, anticancer, lipid-lowering, and immune enhancement. Chitosan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/26A01N43/16A01N25/02A01P1/00A01P21/00
CPCA01N59/26A01N43/16A01N25/02
Inventor 杨洋赵津华
Owner 如东振丰奕洋化工有限公司
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