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Water dispersed tablet of sulfonylurea and/or sulfamide herbicide and its prepn

A technology of sulfonylureas and sulfonamides, which is applied in the field of water-dispersible tablets and their preparation, can solve the problems of poor control of dosage, inconvenient environment, and inconvenient transportation, and achieve reduced losses, less environmental pollution, and easy to carry convenient effect

Active Publication Date: 2009-01-21
张宗俭
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commercial preparations currently developed are mainly wettable powders, suspension concentrates, water-dispersible granules, etc. Due to their high activity, the dosage per mu is only about 0.1-10 grams, and it is very difficult to weigh when used by farmers in small areas. In addition, there are disadvantages such as inconvenient storage and transportation and easy to cause environmental pollution.
[0003] In order to overcome the shortcomings of existing dosage forms such as poor control of dosage, inconvenient storage and transportation, and easy environmental pollution, the present invention provides a new dosage form of water-dispersible tablets of sulfonylurea and / or sulfonamide herbicides

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh each component raw material according to the following proportioning ratio:

[0039] Tribesulfuron 40g

[0040] 12 g microcrystalline cellulose

[0041] Polyvinylpyrrolidone 2 grams

[0042] NaHCO 3 3 grams

[0043] 3 g citric acid

[0044] NNO 5g

[0045] Sodium Lignosulfonate 5g

[0046] Sodium dodecylbenzene sulfonate 1 g

[0047] Magnesium stearate 2 g

[0048] Talc powder 2 grams

[0049] Light calcium carbonate 25g

[0050] The above-mentioned components were fully mixed, and after ultrafine pulverization to 325 meshes, they were directly compressed into 1000 tablets to obtain the tribenuron-methyl water-dispersible tablet.

Embodiment 2

[0052] Weigh each component raw material according to the following proportioning ratio:

[0053] Tribesulfuron 30g

[0054] 12 g microcrystalline cellulose

[0055] Polyvinylpyrrolidone 2 grams

[0056] NaHCO 3 3 grams

[0057] 3 g citric acid

[0058] NNO 5g

[0059] Sodium dodecylbenzene sulfonate 1 g

[0060] Magnesium stearate 2 g

[0061] Silicone 2 grams

[0062] Light calcium carbonate 40g

[0063]According to the method described in Example 1, 1000 pieces of the above-mentioned tribenuron-methyl water-dispersible tablets were prepared from the raw materials of each component in the above proportioning ratio.

Embodiment 3

[0065] Weigh each component raw material according to the following proportioning ratio:

[0066] Tribesulfuron 25g

[0067] 12 g microcrystalline cellulose

[0068] Polyvinylpyrrolidone 2 grams

[0069] NaHCO 3 3 grams

[0070] 3 g citric acid

[0071] NNO 5g

[0072] Sodium dodecylbenzene sulfonate 1 g

[0073] Magnesium stearate 2 g

[0074] Silicone 2 grams

[0075] Talc powder 2 grams

[0076] Light calcium carbonate 43 grams

[0077] According to the method described in Example 1, 1000 pieces of the above-mentioned tribenuron-methyl water-dispersible tablets were prepared from the raw materials of each component in the above proportioning ratio.

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PUM

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Abstract

The present invention relates to new preparation form of sulfonylurea and / or sulfamide herbicide, and is especially one kind of water dispersed tablet of sulfonylurea and / or sulfamide herbicide and its preparation process. The water dispersed tablet is prepared with sulfonylurea and / or sulfamide herbicide as the herbicide components, disintegrant, adhesive, effervescent agent, wetting agent, disperser and stuffing, and through mixing, crushing and tabletting. It has simple preparation process, high herbicidal effect, accurate use amount, less environmental pollution and other advantages.

Description

technical field [0001] The present invention relates to a new dosage form of sulfonylurea and / or sulfonamide herbicides and a preparation method thereof, in particular to a water-dispersible tablet of sulfonylurea and / or sulfonamide herbicides and its preparation method. Background technique [0002] Sulfonylurea and sulfonamide herbicides are ultra-efficient and selective herbicides developed in the 1980s. At present, there are more than 40 commercial varieties, which are widely used in wheat, rice, soybean, rape, corn and other crops and orchards and non-cultivated land to control various weeds. The commercial preparations currently developed are mainly wettable powders, suspension concentrates, water-dispersible granules, etc. Due to their high activity, the dosage per mu is only about 0.1-10 grams, and it is very difficult to weigh when used by farmers in small areas. , In addition, there are disadvantages such as inconvenient storage and transportation and easy to cau...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N47/28A01N25/34
Inventor 张宗俭王勇王龙根张文革李钟华黄文耀
Owner 张宗俭
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