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Paraquat water dispersible granules and preparation method thereof

A technology for dispersing granules and dispersing wetting agents, applied in the fields of botanical equipment and methods, herbicides, algicides, biocides, etc., can solve the problems of being easily swallowed by mistake, transportation cost of paraquat water agent, and high packaging cost , to reduce packaging costs, increase packaging costs and transportation costs, and achieve the effect of convenient use

Active Publication Date: 2014-04-02
NANJING GAOZHENG AGROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a paraquat water dispersible granule with better safety and high content for the defects of paraquat aqueous solution, such as high transportation cost, high packaging cost, and easy to be swallowed by mistake

Method used

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  • Paraquat water dispersible granules and preparation method thereof
  • Paraquat water dispersible granules and preparation method thereof
  • Paraquat water dispersible granules and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0041] Table 1

[0042] Element

Example 1

Example 2

Example 3

Paraquat dichloride

91%

91%

91%

Cationic Dispersed Wetting Agent 1

2.5%

3%

5%

Nonionic Dispersed Wetting Agent 1

0.5%

2%

2%

binder

1.5%

1.5%

1.5%

filler

4.5%

2.5%

0.5%

[0043] Table 2

[0044] Element

Example 4

Example 5

Example 6

Paraquat dichloride

91%

91%

91%

Zwitterionic Dispersed Wetting Agent 2

2.5%

3%

5%

Nonionic Dispersed Wetting Agent 2

0.5%

2%

2%

binder

1.5%

1.5%

1.5%

filler

4.5%

2.5%

0.5%

[0045] Cationic dispersing wetting agent 1 in Table 1-2: Dipolyoxyethylene lauryl methyl ammonium chloride (N=4);

[0046] Zwitterionic Dispersed Wetting Agent 2: Lauroyl Propyl Betaine

[0047] Non-ionic dispersing wetting agent 1: nonylphenol polyoxyethylene ether (ie NP...

Embodiment 7

[0056] Embodiment 7 Prevention effect embodiment

[0057] Field efficacy test:

[0058] Test medicament: the paraquat water dispersible granule prepared by example 1-6

[0059] Control drug 1: 200g / L paraquat water solution (commercially available):

[0060] Control agent 2: the formula is: paraquat dichloride 45%, NP-10 10%, Na 2 SO 4 15%, clay 5%, white carbon black 20%, the paraquat water-dispersible granule prepared according to the preparation method of Example 1 of Chinese patent ZL00813298.4.

[0061] Control drug 3: paraquat water-dispersible granules produced according to the formula and preparation method of Example 1 of Chinese patent application 201110444657.3.

[0062] Test crops: apple orchard weeds

[0063] Active ingredient dosage: each embodiment and contrast agent are 30g a.i. / mu

[0064] After the test, observe the death of weeds on 7 days, 15 days, and 30 days, and compare the herbicidal activity of various pesticides, and observe the growth of crops...

Embodiment 8

[0077] Embodiment 8 preparation property investigation embodiment

[0078] Table 7

[0079]

[0080] Table 8

[0081]

[0082]

[0083] Control drug 1: 200g / L paraquat water solution (commercially available):

[0084] Control agent 2: the formula is: paraquat dichloride 45%, NP-10 10%, Na 2 SO 4 15%, clay 5%, white carbon black 20%, the paraquat water-dispersible granule prepared according to the preparation method of Example 1 of Chinese patent ZL00813298.4.

[0085] Control drug 3: paraquat water-dispersible granules produced according to the formula and preparation method of Example 1 of Chinese patent application 201110444657.3.

[0086] Each parameter in Table 7 and Table 8 is measured as follows:

[0087] 1. Preparation stability Appearance at 54°C:

[0088] Weigh each 50 g of the preparations of Examples 1-6 and the control preparation, place them in glass bottles, and seal them. Store at 54°C for two weeks, and check to see if the appearance of the pre...

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Abstract

Disclosed are a paraquat water dispersible granules and a preparation method thereof. The paraquat water dispersible granules comprise 70%-95% by mass of paraquat positive ions, preferably 80%-95% by mass of paraquat positive ions. The preparation method of the paraquat water dispersible granules comprises: mixing a paraquat probe drug, a dispersible wetting agent, a filling agent, a binding agent, and other auxiliaries, and mixing the mixture with water to obtain a suspension or an aqueous solution; and subjecting the suspension or the aqueous solution to spray drying, pelleting, gas-solid separation, and packaging, so as to obtain the paraquat water dispersible granule product. The present invention makes paraquat into high-content water dispersible granules, which effectively reduce the packaging cost and transportation cost; therefore, environmental protection performance and safety of the paraquat granules in each link from production to application are improved, and the paraquat water dispersible granules have more significant control effect on weeds as compared with the conventional paraquat water aqua.

Description

technical field [0001] The invention belongs to the field of pesticide preparations, and relates to a paraquat water-dispersible granule and a preparation method thereof. Background technique [0002] Paraquat is a kind of bipyridinium salt quick-killing herbicide. It has contact action and certain systemic action. It can kill most grasses and broad-leaved weeds. If it rains one hour after taking the medicine, the efficacy of the medicine will not be affected. The medicinal liquid has no adverse effects on mature or brown bark and vines. Rapid passivation after contact with soil without affecting the roots of crops. It can control various annual weeds, and is mainly suitable for controlling weeds in orchards, mulberry gardens, rubber gardens, corn, sugarcane, soybeans and nursery crops. Because of this advantage, this pesticide is currently widely used in the country. Due to its excellent herbicidal properties, paraquat is the second best-selling pesticide product in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N43/40A01N25/14A01N25/30A01P13/00
CPCA01N43/40
Inventor 汪茂勤汪莘杰米春金
Owner NANJING GAOZHENG AGROCHEM
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