CN102369922B - Pyrazosulfuron water dispersible granule and preparation method thereof - Google Patents
Pyrazosulfuron water dispersible granule and preparation method thereof Download PDFInfo
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- CN102369922B CN102369922B CN 201110318643 CN201110318643A CN102369922B CN 102369922 B CN102369922 B CN 102369922B CN 201110318643 CN201110318643 CN 201110318643 CN 201110318643 A CN201110318643 A CN 201110318643A CN 102369922 B CN102369922 B CN 102369922B
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Abstract
The invention relates to a pyrazosulfuron water dispersible granule and a preparation method thereof. The pyrazosulfuron water dispersible granule consists of the following components by weight percent: 10-85 percent of pyrazosulfuron, 1-8 percent of wetting agent, 1-10 percent of dispersing agent, 0.5-20 percent of disintegrating agent, 0.5-10 percent of bonding agent, 0-5 percent of synergistic agent and remaining percent of fillers. The preparation method comprises the steps of: accurately weighing active components, assistants and carriers according to proportions in a formula and evenly mixing the materials; then grinding the materials into ultrafine powder and granulating; and finally analyzing, screening, inspecting and warehousing. The pyrazosulfuron water dispersible granule overcomes the defects of suspending agents and wettable powder and has the advantages of environmental friendliness and low use cost. When the pyrazosulfuron water dispersible granule is prepared and used, the environmental pollution is reduced and the use cost of farmers is reduced. Therefore, the pyrazosulfuron water dispersible granule is a major trend for the development of pesticide preparation formulation at present.
Description
Technical field
The present invention relates to a kind of agricultural herbicide its preparation method, specifically a kind of pyrazosulfuron water dispersible granules and preparation method thereof.
Background technology
Pyrazosulfuron, chemical name: 5-(4, the amino sulphur of 6-dimethoxypyridin base-2-carbamyl-1-methylpyrazole-4-carboxylic acid (ethyl ester), belong to sulfonylurea herbicide, for selectivity inner sucting conduction type weed killer herbicide, mainly be absorbed by root system, in weeds plant body, shift rapidly, suppress growth, weeds are dead gradually.Paddy rice can be decomposed this medicament, to almost not influence of paddy growth.Efficacy stability, safe, 25～35 days lasting periods.Can prevent and kill off annual and perennial broadleaf weed and sedge weed, as different in nature nutgrass flatsedge, Herba Cyperi Glomerati, firefly Lin, Monochoria vaginalis, Chinese celery, mexicana, angustifolia arrowhead herb, pondweed, blue or green duckweed, Eclipta prostrata.The barnyard grass grass there is certain preventive effect, invalid to moleplant seed.
At present, pyrazosulfuron in use is made generally in the wetting powder use.When wetting powder used in reality, the dust drift was more serious, and human body is caused harm greatly, made troubles to producing, transport, using.
Water dispersible granules is to grow up on the basis of wetting powder and suspending agent, this formulation has overcome the shortcoming of suspending agent and wetting powder, had both the low advantage of environmental protection and use cost, in processing and use, reduced the pollution to environment, and reduced peasant's use cost, be a main trend of present pesticidal preparations formulation development.
Summary of the invention
Purpose of the present invention is exactly to overcome the environmental pollution that exists in the prior art, be detrimental to health and shortcoming such as use cost height and a kind of environmental protection of developing availability height, and pyrazosulfuron water dispersible granules easy to use.Another object of the present invention provides a kind of preparation method of pyrazosulfuron water dispersible granules.
Technical scheme: pyrazosulfuron water dispersible granules each component with percentage by weight is: pyrazosulfuron 10～85%, and wetting agent 1～8%, dispersant 1～10%, disintegrant 0.5～20%, binding agent 0.5～10%, synergist 0～5%, surplus is filler.
Described wetting agent is one or more the combination in lauryl sodium sulfate, sulfosuccinic monooctyl ester sodium salt, dialkyl succinylsuccinate sulfonate, fatty alcohol-polyoxyethylene ether, sodium alkyl benzene sulfonate, the alkylnaphthalene sulfonate.
Described dispersant is alkylphenol polyoxyethylene formaldehyde condensation products, lignosulfonates, polycarboxylate, naphthalenesulfonate formaldehyde condensation compound, to one or more the combination in the methoxyl group fatty acyl amido benzene sulfonic acid.
Described disintegrant is one or more the above combinations in sodium sulphate, urea, sodium carboxymethyl starch, starch, sodium carbonate, ammonium sulfate, sodium chloride, calcium chloride, the bentonite.
Described binding agent is one or more the combination in polyethylene glycol, carboxymethyl cellulose, the polyvinyl alcohol.
Described synergist is a kind of in Tea Saponin, the shitosan.
Described filler is one or more the combination in kaolin, diatomite, precipitated calcium carbonate, white carbon, attapulgite, bentonite, the starch.
The preparation method of pyrazosulfuron water dispersible granules: after 10～85% pyrazosulfurons, 1～8% wetting agent, 1～10% dispersant, 0.5～20% disintegrant, 0～5% synergist, filler mixed in mixer, obtain female powder through the pulverizing of ultra micro air-flow, female powder is mixed with water and 0.5～10% binding agent, granulation then, under 60 ℃～80 ℃ conditions, be dried to water content less than 2%, screening through after the assay was approved, namely obtains required pyrazosulfuron water dispersible granules; The powder sieving thing is back to mixer after crushed to be mixed again, defective work is back to mixer after the check analysis reason mixes again, mix and adopt the method for fractional steps, the lower raw material of constituent content mix earlier dispersing aid or filler again with other mixing of materials, to guarantee the uniformity of product content, baking temperature is at 60 ℃～80 ℃, and variation of temperature and fluctuation are controlled in strictness.
Owing to added the auxiliary agent of heterogeneity, make the present invention have the active component content height in the pyrazosulfuron water dispersible granules of the present invention, environmental pollution is little, disintegration rate is fast, dispersive property reaches heat storage steady performance well, the height of weeding usefulness in use, and safety is good.
Description of drawings
Fig. 1 is preparation method's of the present invention process chart.
Embodiment
Essence for a better understanding of the present invention illustrates technology contents of the present invention with embodiment below, but content of the present invention is not limited thereto.
See Fig. 1, understand the present invention better in order to make those of ordinary skill in the art, the invention provides the preparation method for the pyrazosulfuron water dispersible granules, step is as follows.
(1), choose raw material according to the prescription of pyrazosulfuron water dispersible granules, it is mixed.
(2), after carrying out ultramicro grinding with above mixture, airslide disintegrating mill obtains female powder.
(3), the female powder that obtains after the ultramicro grinding is mixed by prescription and binding agent.
(4), the charging aperture of the material of mixing being put into Squeezinggranulator carries out granulation.
(5), the particle of producing is dried, sieved and detection, pack after qualified.
Embodiment 1:Take by weighing pyrazosulfuron 20%, wetting agent lauryl sodium sulfate 4%, dispersant polycarboxylate 3%, sodium lignin sulfonate 4%, disintegrant sodium sulphate 5%, synergist Tea Saponin 5%, the filler bentonite is supplemented to 100%, after it is mixed, obtains female powder through the airslide disintegrating mill pulverizing, after female powder and binding agent carboxymethyl cellulose 0.5%, water mixed, granulation then, oven dry, sieving obtains 20% pyrazosulfuron water dispersible granules.Be 20.05% through the check active constituent content, moisture≤2.0%, pH value 9.2, screening (by 75 μ m sieve) 〉=98%, suspensibility 〉=90%, lasting foaming characteristic (1min)≤10mL, wetability≤1min, dust≤3.0%, the acceleration heat storage stability is qualified.Being used for control paddy rice broad leaved weed, nutgrass flatsedge and barnyard grass grass dosage is 15～30 grams (active ingredient)/hectare, and preventive effect is 80%～95%.
Embodiment 2:Take by weighing pyrazosulfuron 85%, wetting agent lauryl sodium sulfate 2%, dispersant polycarboxylate 2%, sodium lignin sulfonate 2%, disintegrant urea 3%, synergist shitosan 5%, filler kaolin is supplemented to 100%, after it is mixed, obtain female powder through the airslide disintegrating mill pulverizing, with female powder and binding agent polyethylene glycol 0.5%, after water mixes, granulation then, oven dry, sieving obtains 85% pyrazosulfuron water dispersible granules.Be 85.6% through the check active constituent content, moisture≤2.0%, pH value 8.8, screening (by 75 μ m sieve) 〉=98%, suspensibility 〉=90%, lasting foaming characteristic (1min)≤10mL, wetability≤1min, dust≤3.0%, the acceleration heat storage stability is qualified.Being used for control paddy rice broad leaved weed, nutgrass flatsedge and barnyard grass grass dosage is 15～30 grams (active ingredient)/hectare, and preventive effect is 82%～96%.
Embodiment 3:Take by weighing pyrazosulfuron 10%, wetting agent fatty alcohol-polyoxyethylene ether 3%, dispersant polycarboxylate 3%, sodium lignin sulfonate 4%, disintegrant urea 10%, synergist Tea Saponin 5%, the filler attapulgite is supplemented to 100%, after it is mixed, obtains female powder through the airslide disintegrating mill pulverizing, after female powder and binding agent polyvinyl alcohol 1%, water mixed, granulation then, oven dry, sieving obtains 10% pyrazosulfuron water dispersible granules.Be 10.2% through the check active constituent content, moisture≤2.0%, pH value 8.2, screening (by 75 μ m sieve) 〉=98%, suspensibility 〉=90%, lasting foaming characteristic (1min)≤10mL, wetability≤1min, dust≤3.0%, the acceleration heat storage stability is qualified.Being used for control paddy rice broad leaved weed, nutgrass flatsedge and barnyard grass grass dosage is 15～30 grams (active ingredient)/hectare, and preventive effect is 82%～94%.
Embodiment 4:Take by weighing pyrazosulfuron 30%, wetting agent sulfosuccinic monooctyl ester sodium salt 2%, dispersant polycarboxylate 3%, to methoxyl group fatty acyl amido benzene sulfonic acid 5%, disintegrant urea 20%, synergist shitosan 2%, filler kaolin is supplemented to 100%, after it is mixed, obtains female powder through the airslide disintegrating mill pulverizing, after female powder and binding agent polyvinyl alcohol 1%, water mixed, granulation then, oven dry, sieving obtains 30% pyrazosulfuron water dispersible granules.Be 30.4% through the check active constituent content, moisture≤2.0%, pH value 8.1, screening (by 75 μ m sieve) 〉=98%, suspensibility 〉=90%, lasting foaming characteristic (1min)≤10mL, wetability≤1min, dust≤3.0%, the acceleration heat storage stability is qualified.Being used for control paddy rice grassy weed and part broad leaved weed dosage is 15～30 grams (active ingredient)/hectare, and preventive effect is 79%～96%.
Claims (1)
1. a pyrazosulfuron water dispersible granules is characterized in that: take by weighing pyrazosulfuron 20%, wetting agent lauryl sodium sulfate 4%, dispersant polycarboxylate 3%, sodium lignin sulfonate 4%, disintegrant sodium sulphate 5%, synergist Tea Saponin 5%, the filler bentonite is supplemented to 100%, after it is mixed, pulverize through airslide disintegrating mill and to obtain female powder, after female powder and binding agent carboxymethyl cellulose 0.5%, water are mixed, granulation then, oven dry, sieving obtains 20% pyrazosulfuron water dispersible granules; Above content is weight percentage.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103444708A (en) * | 2013-08-01 | 2013-12-18 | 广东中迅农科股份有限公司 | Water dispersible granule containing chitosan |
| CN103651482A (en) * | 2013-12-30 | 2014-03-26 | 孙蒙蒙 | Corn field herbicide |
| CN106376552A (en) * | 2016-08-26 | 2017-02-08 | 安徽久易农业股份有限公司 | Pyrazosulfuron water dispersible granule |
| CN106376587A (en) * | 2016-08-29 | 2017-02-08 | 广东中迅农科股份有限公司 | Weeding composition for sugarcane field |
| CN109730096B (en) * | 2019-01-30 | 2021-09-28 | 湖南省农业生物技术研究所 | Herbicide composition containing chamomile essential oil and pyrazosulfuron-ethyl and application thereof |
| CN113041956A (en) * | 2021-05-31 | 2021-06-29 | 江西鼎峰智能装备有限公司 | Continuous dry granulation system and granulation method for traditional Chinese medicine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1393133A (en) * | 2001-06-29 | 2003-01-29 | 浙江乐吉化工股份有限公司 | Composite herbicide for rice field |
| CN1393132A (en) * | 2001-06-29 | 2003-01-29 | 浙江乐吉化工股份有限公司 | Composite herbicide for rice field |
| CN1781375A (en) * | 2005-03-31 | 2006-06-07 | 河北宣化农药有限责任公司 | Bicao mixture |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1393133A (en) * | 2001-06-29 | 2003-01-29 | 浙江乐吉化工股份有限公司 | Composite herbicide for rice field |
| CN1393132A (en) * | 2001-06-29 | 2003-01-29 | 浙江乐吉化工股份有限公司 | Composite herbicide for rice field |
| CN1781375A (en) * | 2005-03-31 | 2006-06-07 | 河北宣化农药有限责任公司 | Bicao mixture |
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Owner name: JIANGXI ZHONGXUN AGRO-CHEMICAL CO., LTD. Free format text: FORMER OWNER: GUANGDONG ZHONGXUN AGRICULTURAL TECHNOLOGY CO., LTD. Effective date: 20140917 |
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Effective date of registration: 20140917 Address after: 330500 Jiangxi city of Nanchang province Anyi County Industrial Park metal materials industry base Patentee after: JIANGXI ZHONGXUN AGROCHEMICAL CO., LTD. Address before: 516000 Guangdong province Huizhou Zhongkai hi tech Development Zone No. 24 District Patentee before: Guangdong Zhongxun Agricultural Technology Co., Ltd. |