Bispyribac-sodium dispersible oil suspended agent and preparation method thereof

Abstract

The invention relates to an optional stem and leaf herbicide for a paddy field and a preparation method thereof, and in particular relates to a bispyribac-sodium dispersible oil suspended agent and a preparation method thereof. The bispyribac-sodium dispersible oil suspended agent comprises the following components in percentage by mass: 10-20 percent of bispyribac-sodium, 2-30 percent of emulsifier, 0.2-5 percent of a wetting agent, 0.3-5 percent of a dispersing agent, 0.5-4 percent of a thickening agent, 0.01-5 percent of a defoaming agent, 0.1-1.5 percent of a pH regulating agent, and the balance of an oil-based solvent. The preparation method comprises the following steps: adding the emulsifier, the wetting agent, the dispersing agent, the thickening agent, the defoaming agent and the pH regulating agent into the oil-based solvent, mixing and stirring; adding the bispyribac-sodium drug under stirring of a high-speed shearing machine at a rotating speed of 1,500-10,000 revolution / minute, and shearing for 10-40 minutes; and grinding the mixture by a sand mill until the grain diameter D90 is less than 8 mu m to obtain the bispyribac-sodium dispersible oil suspended agent.

Description

technical field

[0001] The invention relates to a selective stem and leaf herbicide for paddy fields and a preparation method thereof, in particular to a bispyribac ether dispersible oil suspension and a preparation method thereof. Background technique

[0002] Bispyribac (bispyribac sodium salt), other Chinese names: Yiqi, Dipyrimidine Salicylate, Nongmeili; chemical name: 2.6-bis(4.6-dimethoxypyrimidinyl-2-oxyl)benzoic acid Sodium; English name: Bispyribac-sodium; Molecular formula: C 19 h 17 N 4 NaO 8 ; Molecular weight: 452.35; Structural formula: ;CA Registration Number: 125401-75-4; Pesticide Category: Herbicide; Melting Point: 223-224℃; Storage Condition: 0-6℃; Water Solubility: 73.3 g / L (20℃); Chemical Properties: Pure It is white powdery solid, m.p.223~224℃, vapor pressure<5.05×10 -9 Pa (25°C), solubility at 25°C: methanol 26.3g / L, acetone 0.043g / L, water 73.3g / L, half-life in water is 1 year (pH value 7-9), 55°C thermal storage for 14d does not Decomposi...

Examples

Embodiment 1

[0020] After adding 716g of methyl oleate into the shear kettle, add 20g of emulsifier alkylphenol polyoxyethylene ether, 20g of calcium dodecylbenzenesulfonate, 30g of fatty alcohol polyoxyethylene ether, dispersant wood Sodium sulfonate 3g, organic bentonite 40g, long-chain alcohol defoamer 50g and citric acid 15g, mix and stir, and add 106g of bispyribac with a purity of 95% under stirring at a speed of 1500~10000 rpm in a high-speed shearing machine After medicine, cut for 10-40 minutes, and then grind to particle size D by sand mill 90 If it is less than 8 μm, a pale yellow bispyribac-encapsulant dispersible oil suspension concentrate can be obtained.

Embodiment 2

[0022] After adding 450g of methyl oleate and 85.9g of soybean oil into the shear kettle, add 300g of emulsifier sorbitan monolaurate, 1g of wetting agent sodium alkyl succinate sulfonate, fatty alcohol sulfate 1g, 50g of dispersant naphthalenesulfonate formaldehyde condensate, 5g of xanthan gum, 0.1g of silicone defoamer and 1g of triethanolamine, mix and stir, and stir at the speed of high-speed shearing machine 1500~10000 rpm After adding 106g of bispyribac with a purity of 95%, cut it for 10-40 minutes, and then grind it with a sand mill to a particle size of D 90 If it is less than 8 μm, a pale yellow bispyribac-encapsulant dispersible oil suspension concentrate can be obtained.

Embodiment 3

[0024] After adding 450g of methyl oleate and 139g of turpentine-based vegetable oil into the shear kettle, add 200g of emulsifier alkylphenol polyoxyethylene ether sodium sulfate, 30g of wetting agent calcium dodecylbenzenesulfonate, and dispersant 40g of phenol polyoxyethylene ether phosphate, 15g of fumed silicon dioxide, 10g of polyglycerin defoamer, 10g of sodium acetate, mix and stir, and add the 95% purity biscaline under stirring at a speed of 1500~10000 rpm at a high speed shear After 106g of ether, cut for 10-40 minutes, and then grind to particle size D by sand mill 90 If it is less than 8 μm, a pale yellow bispyribac-encapsulant dispersible oil suspension concentrate can be obtained.

technical field

[0001] The invention relates to a selective stem and leaf herbicide for paddy fields and a preparation method thereof, in particular to a bispyribac ether dispersible oil suspension and a preparation method thereof. Background technique

[0002] Bispyribac (bispyribac sodium salt), other Chinese names: Yiqi, Dipyrimidine Salicylate, Nongmeili; chemical name: 2.6-bis(4.6-dimethoxypyrimidinyl-2-oxyl)benzoic acid Sodium; English name: Bispyribac-sodium; Molecular formula: C 19 h 17 N 4 NaO 8 ; Molecular weight: 452.35; Structural formula: ;CA Registration Number: 125401-75-4; Pesticide Category: Herbicide; Melting Point: 223-224℃; Storage Condition: 0-6℃; Water Solubility: 73.3 g / L (20℃); Chemical Properties: Pure It is white powdery solid, m.p.223~224℃, vapor pressure<5.05×10 -9 Pa (25°C), solubility at 25°C: methanol 26.3g / L, acetone 0.043g / L, water 73.3g / L, half-life in water is 1 year (pH value 7-9), 55°C thermal storage for 14d does not Decomposi...

Examples

Embodiment 1

[0020] After adding 716g of methyl oleate into the shear kettle, add 20g of emulsifier alkylphenol polyoxyethylene ether, 20g of calcium dodecylbenzenesulfonate, 30g of fatty alcohol polyoxyethylene ether, dispersant wood Sodium sulfonate 3g, organic bentonite 40g, long-chain alcohol defoamer 50g and citric acid 15g, mix and stir, and add 106g of bispyribac with a purity of 95% under stirring at a speed of 1500~10000 rpm in a high-speed shearing machine After medicine, cut for 10-40 minutes, and then grind to particle size D by sand mill 90 If it is less than 8 μm, a pale yellow bispyribac-encapsulant dispersible oil suspension concentrate can be obtained.

Embodiment 2

[0022] After adding 450g of methyl oleate and 85.9g of soybean oil into the shear kettle, add 300g of emulsifier sorbitan monolaurate, 1g of wetting agent sodium alkyl succinate sulfonate, fatty alcohol sulfate 1g, 50g of dispersant naphthalenesulfonate formaldehyde condensate, 5g of xanthan gum, 0.1g of silicone defoamer and 1g of triethanolamine, mix and stir, and stir at the speed of high-speed shearing machine 1500~10000 rpm After adding 106g of bispyribac with a purity of 95%, cut it for 10-40 minutes, and then grind it with a sand mill to a particle size of D 90 If it is less than 8 μm, a pale yellow bispyribac-encapsulant dispersible oil suspension concentrate can be obtained.

Embodiment 3

[0024] After adding 450g of methyl oleate and 139g of turpentine-based vegetable oil into the shear kettle, add 200g of emulsifier alkylphenol polyoxyethylene ether sodium sulfate, 30g of wetting agent calcium dodecylbenzenesulfonate, and dispersant 40g of phenol polyoxyethylene ether phosphate, 15g of fumed silicon dioxide, 10g of polyglycerin defoamer, 10g of sodium acetate, mix and stir, and add the 95% purity biscaline under stirring at a speed of 1500~10000 rpm at a high speed shear After 106g of ether, cut for 10-40 minutes, and then grind to particle size D by sand mill 90 If it is less than 8 μm, a pale yellow bispyribac-encapsulant dispersible oil suspension concentrate can be obtained.

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