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A kind of preparation method of penoxsulam-polyvinyl alcohol hydrogel composite preparation

A penoxsulam and polyvinyl alcohol technology, applied in the fields of botanical equipment and methods, herbicides and algicides, chemical instruments and methods, etc. The composition of the agent is complex and cannot be retained for a long time, so as to achieve the effects of convenient preparation, low harm and extended validity period.

Active Publication Date: 2022-07-01
南京元素力生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Penoxsulam is rapidly absorbed by the soil and is less leaching in most paddy application soils
Penoxsulam is easy to migrate in the soil and cannot stay for a long time; and its half-life is short, so it is easy to be decomposed
However, the components of the effervescent tablet prepared by this method are complex, including wetting and dispersing agent, acid source, carbon dioxide source, disintegrant, binding agent, lubricant, synergist and carrier
And also will use jet mill and tabletting machine etc. in preparation process, has improved its production cost
Moreover, during the application process, the slow-release effect is extremely poor, and penoxsulam is easy to lose and decompose

Method used

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  • A kind of preparation method of penoxsulam-polyvinyl alcohol hydrogel composite preparation
  • A kind of preparation method of penoxsulam-polyvinyl alcohol hydrogel composite preparation
  • A kind of preparation method of penoxsulam-polyvinyl alcohol hydrogel composite preparation

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Experimental program
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Effect test

Embodiment 1 5

[0024] Embodiment 1 The preparation method of penoxsulam-polyvinyl alcohol hydrogel composite preparation

[0025] (1) Weigh 4g of polyvinyl alcohol and dissolve it in 100mL of deionized water, stir and heat it at 100°C to dissolve it completely, then cool to 30°C to obtain a polyvinyl alcohol aqueous solution;

[0026] (2) take by weighing 500mg penoxsulam and 5mg sodium polystyrene sulfonate and dissolve in 5mL dimethyl sulfoxide to obtain solution A;

[0027] (3) adding penoxsulam and solution A to the polyvinyl alcohol solution, and reacting at 30°C for 1 hour;

[0028] (4) Place the above solution in a refrigerator at -20°C for 12h;

[0029] (5) Washing the hydrogel prepared in step (4) with water twice to obtain a penoxsulam-polyvinyl alcohol hydrogel composite preparation.

Embodiment 2 5

[0030] Embodiment 2 The preparation method of penoxsulam-polyvinyl alcohol hydrogel composite preparation

[0031] (1) Weigh 20g of polyvinyl alcohol and dissolve it in 100mL of deionized water, stir and heat at 200°C to dissolve it completely, then cool to 40°C to obtain an aqueous solution of polyvinyl alcohol;

[0032] (2) take by weighing 500mg penoxsulam and 5mg sodium polystyrene sulfonate and dissolve in 5mL dimethyl sulfoxide solution A;

[0033] (3) Add penoxsulam and solution A to the polyvinyl alcohol solution, and react at 40°C for 2 hours;

[0034] (4) Place the above solution in a refrigerator at -20°C for 12h;

[0035] (5) Washing the hydrogel prepared in step (4) with water twice to obtain a penoxsulam-polyvinyl alcohol hydrogel composite preparation.

Embodiment 3 5

[0036] Embodiment 3 The preparation method of penoxsulam-polyvinyl alcohol hydrogel composite preparation

[0037] (1) Weigh 4g of polyvinyl alcohol and dissolve it in 100mL of deionized water, stir and heat it at 100°C to dissolve it completely, then cool to 30°C to obtain an aqueous solution of polyvinyl alcohol;

[0038] (2) take by weighing 1g penoxsulam and 10mg Tween-80 solution A in 5mL dimethyl sulfoxide;

[0039] (3) adding the mixed solution of penoxsulam and sodium polystyrene sulfonate to the polyvinyl alcohol solution, and reacting at 30°C for 1 hour;

[0040] (4) Place the above solution in a refrigerator at -20°C for 12h;

[0041] (5) Washing the hydrogel prepared in step (4) with water twice to obtain a penoxsulam-polyvinyl alcohol hydrogel composite preparation.

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Abstract

The invention belongs to the technical field of pesticide preparations, and provides a preparation method of a penoxsulam-polyvinyl alcohol hydrogel composite preparation. The hydrogel composite preparation is prepared by mixing penoxsulam, surfactant and polyvinyl alcohol, specifically, mixing penoxsulam, surfactant and polyvinyl alcohol solution, and stirring, freezing, After the washing treatment, the penoxsulam-polyvinyl alcohol hydrogel composite preparation is obtained. Compared with the prior art, the present invention effectively improves the immobilization rate of penoxsulam and enhances the slow-release performance of penoxsulam through the embedding method. In addition, polyvinyl alcohol as a carrier material for penoxsulam is an excellent soil conditioner. Moreover, the penoxsulam-polyvinyl alcohol hydrogel composite preparation of the present invention has lower preparation cost and is convenient for transportation and storage.

Description

technical field [0001] The invention belongs to the technical field of pesticide preparations, and in particular relates to a preparation method of a penoxsulam-polyvinyl alcohol hydrogel composite preparation. Background technique [0002] In recent years, weeds have frequently occurred in rice fields planted across the country. Field weeds will compete with rice for glory, fertilizer, and water, which seriously affects the growing environment of rice and greatly reduces the yield and quality of rice. Penoxsulam plays an extremely important role in the agricultural field. It is a broad-spectrum herbicide for paddy fields and is effective against barnyardgrass, annual sedge weeds, and many broad-leaved weeds. Penoxsulam can be rapidly absorbed by soil and has weak leaching in most paddy-applied soils. Penoxsulam is easy to migrate in soil and cannot be retained for a long time; and its half-life is short and easy to be decomposed. These phenomena seriously affected the app...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N43/90A01N25/22C09K17/20A01P13/00
CPCA01N43/90A01N25/22C09K17/20
Inventor 曹逊
Owner 南京元素力生物科技有限公司