CN101278671A - Plural gel preparation for delaying release of herbicide and method of preparing the same - Google Patents
Plural gel preparation for delaying release of herbicide and method of preparing the same Download PDFInfo
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- CN101278671A CN101278671A CNA2008100604326A CN200810060432A CN101278671A CN 101278671 A CN101278671 A CN 101278671A CN A2008100604326 A CNA2008100604326 A CN A2008100604326A CN 200810060432 A CN200810060432 A CN 200810060432A CN 101278671 A CN101278671 A CN 101278671A
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- weed killer
- killer herbicide
- gel preparation
- preparation
- plural gel
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Abstract
The invention discloses a compound gel preparation used for deferring the release of weedicide, which is confected by the raw materials with the following weight percentage of 15 to 60 percent of modified bentonite, 10 to 50 percent of carboxymethyl cellulose, 15 to 60 percent of the weedicide and 0.1 to 15 percent of water. The invention also discloses a preparation method of the compound gel preparation used for deferring the release of the weedicide. The compound gel preparation of the invention has the advantages of being capable of deferring the release of the weedicide, reducing medicine dosage, prolonging action time, improving the utilization efficiency of the weedicide and relieving the pollution to the environment caused by the weedicide.
Description
Technical field
The present invention relates to a kind of plural gel preparation that delays weed killer herbicide release and preparation method thereof.
Background technology
Existing weed killer herbicide is based on conventional dosage forms such as missible oil, after being administered to plant or soil, most of herbicidal activity composition is with the loss of surface runoff or with the soil moisture leaching loss that moves both vertically, enter the face of land or groundwater regime, reduce the weed killer herbicide utilization ratio on the one hand, brought the serious environmental pollution problem on the other hand.
Summary of the invention
The object of the present invention is to provide a kind of plural gel preparation that delays weed killer herbicide release and preparation method thereof, the present invention has the release that can delay weed killer herbicide, reduce formulation rate, prolong action time, improve the weed killer herbicide utilization ratio, alleviate the pollution characteristics of weed killer herbicide environment.
In order to achieve the above object, technical scheme of the present invention is: utilize carboxymethyl cellulose and crosslinking agent, comprise the cross-linking reaction preparation of multivalent metal cation such as iron ion.
A kind of plural gel preparation that delays weed killer herbicide release, it is formulated by following weight percentages:
Modified alta-mud 15-60%;
Carboxymethyl cellulose 10-50%;
Weed killer herbicide 15-60%;
Moisture 0.1-15%.
Wherein weed killer herbicide be meant use in the agricultural production to eliminate weeds, protection crops normal growth all kinds of natural or synthesis of chemicals as purpose.
The described raw material that delays the plural gel preparation of weed killer herbicide release, preferred weight percent is:
Modified alta-mud 25-50%;
Carboxymethyl cellulose 20-45%;
Weed killer herbicide 25-50%;
Moisture 0.1-10%.
Described modified alta-mud is meant to improve the organic purpose that is adsorbed as, and by the product of bentonite through the ion-exchange reactions preparation, adopts a kind of in acidifying bentonite, hydroxy metal pillared bentonite, the organobentonite.Both the acidifying bentonite adopted bentonite and sulfuric acid reaction preparation, the hydroxide prepared in reaction of metals such as hydroxy metal pillared bentonite employing bentonite and iron, aluminium, organobentonite adopts bentonite and cationic surfactant (or claiming organic cation) prepared in reaction.
Described carboxymethyl cellulose is a kind of water-soluble cellulose derivative that contains hydroxyl and carboxyl, and the cation on its carboxyl can be sodium ion or potassium ion, and average molecular mass is 10, and 000-800 is between 000.Carboxymethyl cellulose can generate gel by the chemical crosslinking effect, and product can be used as water-loss reducer and plants the clothing agent.The present invention utilizes its gel characteristic, with the preparation gel that is combined with each other such as modified alta-mud, and is used for bag and carries a weed killer herbicide and prepare gel preparation.
A kind of preparation method who delays the plural gel preparation of weed killer herbicide release, comprise following processing step: modified alta-mud and herbicidal activity composition are added in the entry, mix and make the suspension that solid contents is 1-10%, add carboxymethyl cellulose again, stirring is dissolved fully until carboxymethyl cellulose, after mixing with crosslinking agent, react 0-48h down at 10-99 ℃, then at 40-130 ℃ of following dry 0.5-12h, dried product can cut into granular, sheet or bulk by instructions for use and occasion.
Described crosslinking agent is a multivalent metal cation, comprises one or more combinations with arbitrary proportion and form in iron ion or aluminum ions water soluble salt compounds, epoxychloropropane, the glutaraldehyde.
Beneficial effect of the present invention is: can be extended to by several hours of conventional cream preparation more than 360 hours the release time of weed killer herbicide, reduced the number of times and the consumption of repetitive administration weed killer herbicide; Next obtains the gel preparation of moulding, can obtain granular, sheet or bulk product according to producing needs; By the rate of release of control weed killer herbicide, reduce loss and the leaching loss amount of weed killer herbicide in soil once more, helped alleviating the environmental pollution that agricultural chemicals brings.
Embodiment
Embodiment 1
(2,4-D) 4g adds in the 100mL water, fully mixes to be unit for uniform suspension, adds the 2g sodium carboxymethylcellulose, stirs and dissolves fully until sodium carboxymethylcellulose with acidifying bentonite 3g, weed killer herbicide 2,4 dichlorophenoxyacetic acid.Adding concentration is 25% ferric nitrate (crosslinking agent) aqueous solution 1mL, after mixing, react 8h down at 40 ℃, at 60 ℃ of following dry 1h, each components contents is respectively in the plural gel preparation that obtains: acidifying bentonite 30.9%, carboxymethyl cellulose 20.6%, weed killer herbicide 40.2%, moisture 8.3% then.
Plural gel preparation with preparation carries out release experiment then, sampling 0.2g puts into 1L water, water sampling analysis weed killer herbicide quality wherein behind the certain hour of interval, calculate the release rate (promptly being discharged into the percentage that weed killer herbicide quality in the water accounts for initial quality in the preparation) of weed killer herbicide under the different time, the results are shown in Table 1.The weed killer herbicide analytical method can adopt the well-known chromatographic process of analysis of agricultural drugs technical field.
Embodiment 2
Get hydroxyl-aluminum pillared bentonite 2g, weed killer herbicide Acetochlor 2.5g, add in the 100mL water, fully mix and be unit for uniform suspension, add the 2g sodium carboxymethylcellulose, stir and dissolve fully until sodium carboxymethylcellulose.Adding concentration is 18% aluminum nitrate (crosslinking agent) aqueous solution 1mL, after mixing, react 6h down at 40 ℃, at 60 ℃ of following dry 1.5h, each components contents is respectively in the plural gel preparation that obtains: hydroxyl-aluminum pillared bentonite 28.5%, carboxymethyl cellulose 28.5%, weed killer herbicide 34.3%, moisture 8.7% then.Adopt embodiment 1 described method to carry out release experiment, obtain the release rate of weed killer herbicide under the different time, the results are shown in Table 1.
Embodiment 3
Get iron carbonyl pillared bentonite 4g, weed killer herbicide isopropyl methoxalamine 4.5g, add in the 100mL water, fully mix and be unit for uniform suspension, add the 2g sodium carboxymethylcellulose, stir and dissolve fully until sodium carboxymethylcellulose.Adding concentration is 30% glutaraldehyde (crosslinking agent) aqueous solution 1.8mL, after mixing, react 12h down at 60 ℃, at 80 ℃ of following dry 2h, each components contents is respectively in the plural gel preparation that obtains: iron carbonyl pillared bentonite 35.8%, carboxymethyl cellulose 18.3%, weed killer herbicide 40.3%, moisture 5.6% then.Adopt embodiment 1 described method to carry out release experiment, obtain the release rate of weed killer herbicide under the different time, the results are shown in Table 1.
Embodiment 4
Get organobentonite 2g, herbicide atrazine 1.8g, add in the 100mL water, fully mix and be unit for uniform suspension, add the 2.5g sodium carboxymethylcellulose, stir and dissolve fully until sodium carboxymethylcellulose.Adding concentration is 30% epoxychloropropane (crosslinking agent) aqueous solution 2.5mL, after mixing, react 24h down at 40 ℃, at 50 ℃ of following dry 1h, each components contents is respectively in the plural gel preparation that obtains: organobentonite 28.6%, carboxymethyl cellulose 35.7%, weed killer herbicide 25.0%, moisture 10.7% then.Adopt embodiment 1 described method to carry out release experiment, obtain the release rate of weed killer herbicide under the different time, the results are shown in Table 1.
Comparative examples 1
Utilize conventional method that commercially available 50% acetochlor ec preparation 80mg is added in the 1L water, water sampling analysis Acetochlor quality wherein behind the certain hour of interval, the release rate of Acetochlor the results are shown in Table 1 under the calculating different time.
Table 1
| Time, hour | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Comparative examples 1 |
| 3 | 11.3％ | 10.3％ | 13.6％ | 8.5％ | 92.8％ |
| 24 | 28.5％ | 26.3％ | 34.5％ | 22.8％ | 99.6％ |
| 48 | 40.1％ | 38.8％ | 46.5％ | 33.0％ | -- |
| 96 | 50.5％ | 48.5％ | 62.1％ | 44.5％ | -- |
| 144 | 58.6％ | 59.6％ | 72.5％ | 53.0％ | -- |
| 216 | 69.0％ | 67.3％ | 81.8％ | 61.9％ | -- |
| 288 | 76.2％ | 76.5％ | 89.6％ | 70.8％ | -- |
| 360 | 83.8％ | 83.2％ | 93.2％ | 78.5％ | -- |
| 456 | 89.5％ | 88.7％ | 95.9％ | 83.9％ | -- |
Claims (6)
1, a kind of plural gel preparation that delays weed killer herbicide release is characterized in that it is formulated by following weight percentages:
Modified alta-mud 15-60%;
Carboxymethyl cellulose 10-50%;
Weed killer herbicide 15-60%;
Moisture 0.1-15%.
2, the plural gel preparation that delays weed killer herbicide release as claimed in claim 1 is characterized in that: described raw material, and percentage by weight is:
Modified alta-mud 25-50%;
Carboxymethyl cellulose 20-45%;
Weed killer herbicide 25-50%;
Moisture 0.1-10%.
3, the plural gel preparation that delays weed killer herbicide release as claimed in claim 1, it is characterized in that: described modified alta-mud is meant to improve the organic purpose that is adsorbed as, by the product of bentonite, adopt a kind of in acidifying bentonite, hydroxy metal pillared bentonite, the organobentonite through ion-exchange reactions preparation.
4, the plural gel preparation that delays weed killer herbicide release as claimed in claim 1, it is characterized in that: described carboxymethyl cellulose is a kind of water-soluble cellulose derivative that contains hydroxyl and carboxyl, cation on its carboxyl can be sodium ion or potassium ion, average molecular mass is 10,000-800 is between 000.
5, a kind of preparation method who delays the plural gel preparation of weed killer herbicide release as claimed in claim 1, it is characterized in that comprising following processing step: modified alta-mud and herbicidal activity composition are added in the entry, mix and make the suspension that solid contents is 1-10%, add carboxymethyl cellulose again, stirring is dissolved fully until carboxymethyl cellulose, after mixing with crosslinking agent, react 0-48h down at 10-99 ℃, at 40-130 ℃ of following dry 0.5-12h, dried product can cut into granular by instructions for use and occasion then, sheet, or it is block.
6, a kind of preparation method who delays the plural gel preparation of weed killer herbicide release as claimed in claim 1, it is characterized in that: described crosslinking agent is a multivalent metal cation, comprises one or more combinations with arbitrary proportion and form in iron ion or aluminum ions water soluble salt compounds, epoxychloropropane, the glutaraldehyde.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100604326A CN101278671A (en) | 2008-04-09 | 2008-04-09 | Plural gel preparation for delaying release of herbicide and method of preparing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100604326A CN101278671A (en) | 2008-04-09 | 2008-04-09 | Plural gel preparation for delaying release of herbicide and method of preparing the same |
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| CN101278671A true CN101278671A (en) | 2008-10-08 |
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| CNA2008100604326A Pending CN101278671A (en) | 2008-04-09 | 2008-04-09 | Plural gel preparation for delaying release of herbicide and method of preparing the same |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010003499A3 (en) * | 2008-06-17 | 2011-02-17 | Syngenta Participations Ag | Agrochemical formulation |
| CN102939961A (en) * | 2012-11-06 | 2013-02-27 | 绍兴文理学院 | Pesticide microparticle preparation having core-shell structure and preparation method thereof |
| CN102939960A (en) * | 2012-11-06 | 2013-02-27 | 绍兴文理学院 | Sustained-release herbicide microparticle preparation and preparation method thereof |
| CN103109806A (en) * | 2013-02-27 | 2013-05-22 | 苏州朗信医药科技有限公司 | Sustained-release pellet for weed inhibitor and preparation method thereof |
| CN103518712A (en) * | 2013-10-30 | 2014-01-22 | 绍兴文理学院 | Sustained-release chloroacetamide herbicide water dispersible granule and preparation method thereof |
| CN110800666A (en) * | 2019-11-16 | 2020-02-18 | 汪辉 | Carrier replacement type ecological breeding method for pearl mussel breeding |
-
2008
- 2008-04-09 CN CNA2008100604326A patent/CN101278671A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010003499A3 (en) * | 2008-06-17 | 2011-02-17 | Syngenta Participations Ag | Agrochemical formulation |
| CN102939961A (en) * | 2012-11-06 | 2013-02-27 | 绍兴文理学院 | Pesticide microparticle preparation having core-shell structure and preparation method thereof |
| CN102939960A (en) * | 2012-11-06 | 2013-02-27 | 绍兴文理学院 | Sustained-release herbicide microparticle preparation and preparation method thereof |
| CN102939960B (en) * | 2012-11-06 | 2014-07-02 | 绍兴文理学院 | Sustained-release herbicide microparticle preparation and preparation method thereof |
| CN102939961B (en) * | 2012-11-06 | 2014-07-30 | 绍兴文理学院 | Pesticide microparticle preparation having core-shell structure and preparation method thereof |
| CN103109806A (en) * | 2013-02-27 | 2013-05-22 | 苏州朗信医药科技有限公司 | Sustained-release pellet for weed inhibitor and preparation method thereof |
| CN103518712A (en) * | 2013-10-30 | 2014-01-22 | 绍兴文理学院 | Sustained-release chloroacetamide herbicide water dispersible granule and preparation method thereof |
| CN110800666A (en) * | 2019-11-16 | 2020-02-18 | 汪辉 | Carrier replacement type ecological breeding method for pearl mussel breeding |
| CN110800666B (en) * | 2019-11-16 | 2021-10-01 | 汪辉 | Carrier replacement type ecological breeding method for pearl mussel breeding |
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Open date: 20081008 |