Molluscicide LDS sustained-release granules and preparation method thereof

Abstract

The invention belongs to the technical field of pesticides, and particularly relates to molluscicide LDS sustained-release granules. The molluscicide LDS sustained-release granules comprise LDS and auxiliary additives and comprise components in parts by weight as follows: 5-50 parts of the LDS and the balance of the auxiliary additives, wherein the auxiliary additives comprise 0.05-1 part of a surfactant, 0-10 parts of a binder, 0.2-1 part of an antifoaming agent, 0.2-10 parts of a lubricant and 30-90 parts of carriers. The LDS sustained-release granules are good in drug stability, are higher in adhesive force and rain wash resistance after scattered, have the characteristics of sustained and slow release and good effect and still have a better control effect after applied for 14 days, repeated usage is avoided, pollution is reduced, the usage cost is reduced, and the molluscicidal effect is improved.

Description

technical field

[0001] The invention belongs to the technical field of pesticides, and in particular relates to a slow-release granule of molluscicide salicylamine chloride and a preparation method thereof. Background technique

[0002] Schistosomiasis is a major infectious disease that seriously endangers the health of our people, and oncomelania is the only intermediate host of schistosomiasis. Eliminating oncomelania is an effective method to prevent and control schistosomiasis. The Chinese patent with publication number CN1958565A provides a new molluscicide quinone 4'-nitro-2', 5-dichlorosalicylanilide sodium (hereinafter referred to as chlorosalicylamine), which is Odorless and tasteless dark brown solid powder, soluble in methanol, ethanol, acetone, ethyl acetate, etc., slightly soluble in water, almost insoluble in ether, chemically stable at room temperature. Its chemical formula is C 13 h 7 N 2 Cl 2 o 4 Na, relative molecular mass M w =349.1, the structural ...

Examples

Embodiment 1

[0018] Mix 50.0g of chlorosalicylamine technical material, 30.0g of soluble starch, 10g of dextrin, 8.5g of magnesium stearate, 0.6g of sodium laurylsulfonate, and 0.9g of simethicone, and add an appropriate amount of water , while heating to 60°C-70°C, use a mixer to assist stirring evenly, then extrude and granulate, dry and grind until the particle fineness passes the pharmacopoeia sieve of 10 mesh and 24 mesh, and the particle size is 10 mesh to 24 mesh The granules are salicylamine chloride sustained-release granule products.

Embodiment 2

[0020] 50.0g of salicylamine chloride, 30.0g of amylose, 8.5g of sodium carboxymethyl starch, 0.9g of cetyltrimethylsodium bromide, 0.6g of polyoxypropylene polyoxyethylene glyceryl ether, hard Magnesium fatty acid 10.0g, mix evenly, add appropriate amount of water, stir and heat to 70°C, keep for 30 minutes, after becoming a viscous wet mass, extrude and granulate, dry and pass through a pharmacopoeia sieve, take 10 mesh and 24 mesh The granules in between are chlorinated salicylamine sustained-release granules.

Embodiment 3

[0022] With 40.0g salicylamine chloride, 40.0g amylose, 7.0g diatomaceous earth, 10.0g hydroxypropyl methylcellulose, 0.6g cetyltrimethylammonium chloride, 1.5g liquid paraffin, two Mix 0.9g of methyl silicone oil evenly, add appropriate amount of water, and heat to 70-80°C, stir to make it into a viscous mass, extrude and granulate, dry, pass through a pharmacopoeia sieve, and take between 10 mesh and 24 mesh The granules are chlorinated salicylamine sustained-release granules.

technical field

[0001] The invention belongs to the technical field of pesticides, and in particular relates to a slow-release granule of molluscicide salicylamine chloride and a preparation method thereof. Background technique

[0002] Schistosomiasis is a major infectious disease that seriously endangers the health of our people, and oncomelania is the only intermediate host of schistosomiasis. Eliminating oncomelania is an effective method to prevent and control schistosomiasis. The Chinese patent with publication number CN1958565A provides a new molluscicide quinone 4'-nitro-2', 5-dichlorosalicylanilide sodium (hereinafter referred to as chlorosalicylamine), which is Odorless and tasteless dark brown solid powder, soluble in methanol, ethanol, acetone, ethyl acetate, etc., slightly soluble in water, almost insoluble in ether, chemically stable at room temperature. Its chemical formula is C 13 h 7 N 2 Cl 2 o 4 Na, relative molecular mass M w =349.1, the structural ...

Examples

Embodiment 1

[0018] Mix 50.0g of chlorosalicylamine technical material, 30.0g of soluble starch, 10g of dextrin, 8.5g of magnesium stearate, 0.6g of sodium laurylsulfonate, and 0.9g of simethicone, and add an appropriate amount of water , while heating to 60°C-70°C, use a mixer to assist stirring evenly, then extrude and granulate, dry and grind until the particle fineness passes the pharmacopoeia sieve of 10 mesh and 24 mesh, and the particle size is 10 mesh to 24 mesh The granules are salicylamine chloride sustained-release granule products.

Embodiment 2

[0020] 50.0g of salicylamine chloride, 30.0g of amylose, 8.5g of sodium carboxymethyl starch, 0.9g of cetyltrimethylsodium bromide, 0.6g of polyoxypropylene polyoxyethylene glyceryl ether, hard Magnesium fatty acid 10.0g, mix evenly, add appropriate amount of water, stir and heat to 70°C, keep for 30 minutes, after becoming a viscous wet mass, extrude and granulate, dry and pass through a pharmacopoeia sieve, take 10 mesh and 24 mesh The granules in between are chlorinated salicylamine sustained-release granules.

Embodiment 3

[0022] With 40.0g salicylamine chloride, 40.0g amylose, 7.0g diatomaceous earth, 10.0g hydroxypropyl methylcellulose, 0.6g cetyltrimethylammonium chloride, 1.5g liquid paraffin, two Mix 0.9g of methyl silicone oil evenly, add appropriate amount of water, and heat to 70-80°C, stir to make it into a viscous mass, extrude and granulate, dry, pass through a pharmacopoeia sieve, and take between 10 mesh and 24 mesh The granules are chlorinated salicylamine sustained-release granules.

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