Paraquat cream and its preparation technology

A technology of paraquat and ointment, which is applied in the direction of herbicides, algicides, biocides, biocides, etc., can solve the problems of strong toxicity of paraquat and great threat to livestock, and achieve simple production process, prevent human and livestock from ingestion, The effect of reducing usage

Inactive Publication Date: 2013-05-01
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, paraquat is highly toxic and poses a great threat to humans and animals.

Method used

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  • Paraquat cream and its preparation technology
  • Paraquat cream and its preparation technology
  • Paraquat cream and its preparation technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1 10% paraquat ointment

[0036] The content of each component (by weight) is dispersant KY5015%, thickener SY1012%, stabilizer phenyl glycidyl ether 5%, PH regulator and deionized water are added to the reactor, the system PH=6, heated To 80 ℃, mechanical stirring and emulsification for 0.5h; then add 10% paraquat, stir evenly; finally add antifreeze agent propylene glycol 2%, chelating agent edetate disodium 2%, add deionized water to 100%. Stir evenly, and the discharged material is cooled and creamed to prepare a paraquat ointment with pH=6.

[0037] 1) Viscosity determination of the prepared paraquat ointment

[0038] The viscosity measuring instrument is the NDJ-1 rotary viscometer of Shanghai Hengping Instrument Factory.

[0039] Temperature: 25°C;

[0040] Rotor: No. 3 rotor, speed: 12 rpm;

[0041] The viscosity of the paraquat ointment that records this formula to make is 11000mPa.s,

[0042] 2) Determination of the dispersibility of the prepar...

Embodiment 2

[0047] Embodiment 2 20% paraquat ointment

[0048] The content of each component (by weight) is dispersant KY5555g, thickener SY1022g, stabilizer cresyl glycidyl ether 5g, pH regulator and deionized water were added to the reactor, the system pH=6, heated to 80 °C, emulsify with mechanical stirring for 0.5h; then add 20g of paraquat and stir evenly; finally add 2g of antifreeze ethylene glycol, 2g of disodium edetate as a chelating agent, and add deionized water to 100g. Stir evenly, and the discharged material is cooled and creamed to prepare a paraquat ointment.

[0049] The paraquat ointment prepared by this formula has a pH of 6, a viscosity of 10000mPa.s, good dispersion, no precipitation, no floc, disintegration 98.7%.

Embodiment 3

[0050] Embodiment 3 25% paraquat ointment

[0051]The content of each component (by weight) is dispersant KY6015g, thickener SY1032g, stabilizer phenyl glycidyl ether 5g, pH regulator and deionized water were added to the reactor, the system pH=6, heated to 80 °C, emulsify with mechanical stirring for 0.5h; then add 25g of paraquat and stir evenly; finally add 2g of antifreeze propylene glycol, 2g of disodium edetate as a chelating agent, and add deionized water to 100g. Stir evenly, and the discharged material is cooled and creamed to prepare a paraquat ointment.

[0052] The paraquat ointment prepared by this formula has pH=6, viscosity of 11600mPa.s, pH=6, good dispersibility, no precipitation, no flocculent, disintegration 98.5%.

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Abstract

The invention belongs to the organic pesticide field, and discloses a paraquat cream and its preparation technology. The paraquat cream comprises the following substances, by mass, 10 parts of paraquat, 0.02-10 parts of a dispersant, 0.02-10 parts of a thickening agent, 0.002-10 parts of a stabilizing agent, 0.002-10 parts of a chelating agent, and 0.002-10 parts of an anti-freezing agent. The preparation technology comprises the following steps: uniformly mixing the dispersant, the thickening agent, the stabilizing agent, a pH adjusting agent and water, adding a paraquat mother liquor, stirring for emulsification, discharging, and cooling to obtain the paraquat cream. The paraquat cream has the advantages of high flash point, difficult combustion and explosion, safe production and use, environmental protection, low cost, strong market competitiveness, easy packaging, and excellent weeding effect.

Description

technical field [0001] The invention belongs to the technical field of organic pesticide application, and relates to a pesticide dosage form containing paraquat, in particular to a paraquat ointment and a preparation process thereof. Background technique [0002] In the 21st century, the use of pesticides is still one of the main means for humans to fight against diseases, insect pests and weeds in agricultural production. Paraquat is a fast-killing herbicide with contact and systemic effects. It can be quickly absorbed by the green tissue of plants, causing them to die. Has no effect on non-green organizations. It is mainly used for weeding on orchards, mulberry fields, corn, cotton, soybeans, sugar cane and other crops. Due to its advantages of high efficiency and low price, paraquat is currently widely used in China. However, paraquat is highly toxic and poses a great threat to humans and livestock. Once poisoned, there is no specific antidote, and more than 5,000 pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/40A01N25/04A01P13/00
Inventor 任天瑞何华雄
Owner SHANGHAI NORMAL UNIVERSITY
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