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Polyurethane diolame controlled-release fertilizer containing herbicide and preparation method thereof

A technology for controlled-release fertilizers and herbicides, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of increasing and weakening of herbicidal effects, and achieve the effects of inhibiting growth, excellent controlled-release performance, and good promotion prospects.

Active Publication Date: 2013-09-25
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although as early as the 1950s in the United States, a small amount of mixed herbicides and chemical fertilizers had been released, but there have always been doubts about whether the herbicides and fertilizers can be stable after mixing, and whether the weeding effect will increase or decrease.

Method used

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  • Polyurethane diolame controlled-release fertilizer containing herbicide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 1 kg of compound fertilizer particles with a particle size of 3 to 4 mm, and place them in a water chestnut sugar coating machine with a diameter of 400 mm. Turn on the rotary switch and heating switch of the sugar coating machine to preheat the fertilizer. The speed of the sugar coating machine is 46r / min. Until the fertilizer temperature reaches 75℃ and keep it warm;

[0028] Weigh 12.5g castor oil, 0.8g butachlor, 0.6g microcrystalline paraffin to form coating liquid A, and heat to 75℃ to melt microcrystalline paraffin completely; Weigh 6.1g polymethylene polyphenyl polyisocyanate , Which is the coating liquid B, heated to 75°C. The mass ratio of the polyol in the coating liquid A to the isocyanate in the coating liquid B is 2.05:1. The coating liquids A and B are sprayed onto the surface of the fertilizer particles simultaneously by spraying, and the temperature is maintained at 75°C for in-situ polymerization and curing for 6 minutes, and the surface of the fer...

Embodiment 2

[0030] Weigh 1 kg of compound fertilizer particles with a particle size of 3 to 4 mm, and place them in a water chestnut sugar coating machine with a diameter of 400 mm. Turn on the rotary switch and heating switch of the sugar coating machine to preheat the fertilizer. The speed of the sugar coating machine is 46r / min. Until the fertilizer temperature reaches 80℃ and keep it warm;

[0031] Weigh 13g castor oil, 1g butachlor and 0.7g microcrystalline paraffin to form coating liquid A. Heat to 80°C to melt microcrystalline paraffin completely; weigh 5.3g polymethylene polyphenyl polyisocyanate, that is It is the coating liquid B, heated to 80°C. The mass ratio of the polyol in the coating liquid A to the isocyanate in the coating liquid B is 2.45:1. The uniformly heated coating liquids A and B were sprayed onto the surface of the fertilizer particles at the same time by spraying, and the temperature was maintained at 80°C for in-situ polymerization and curing for 6 minutes. The ...

Embodiment 3

[0033] Weigh 1 kg of compound fertilizer particles with a particle size of 3 to 4 mm, and place them in a water chestnut sugar coating machine with a diameter of 400 mm. Turn on the rotary switch and heating switch of the sugar coating machine to preheat the fertilizer. The speed of the sugar coating machine is 46r / min. Until the fertilizer temperature reaches 85℃ and keep it warm;

[0034] Weigh 14g castor oil, 1.4g butachlor, 1.1g microcrystalline paraffin to form coating liquid A, heat it to 85°C to completely melt microcrystalline paraffin; weigh 6g polymethylene polyphenyl polyisocyanate, that is For coating liquid B, heat to 85°C. The mass ratio of polyol in coating liquid A to isocyanate in coating liquid B is 2.33:1. The uniformly heated coating liquids A and B are sprayed onto the surface of the fertilizer particles at the same time by spraying, and the temperature is maintained at 85°C for in-situ polymerization and curing for 5 minutes. The surface of the fertilizer ...

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Abstract

The invention discloses a polyurethane diolame controlled-release fertilizer containing herbicide and a preparation method of the fertilizer, and relates to a diolame controlled-release fertilizer and a preparation method thereof. The polyurethane diolame controlled-release fertilizer containing the herbicide comprises fertilizer grains, wherein the fertilizer grains are externally provided with a polyurethane diolame with the herbicide; the polyurethane diolame containing the herbicide is 1-20% of the mass of the grain fertilizer according to percentage by mass. The polyurethane diolame controlled-release fertilizer containing the herbicide is prepared by putting the fertilizer grains into a sugarcoating machine, starting the sugarcoating machine to preheat, respectively heating a polyurethane diolame liquid A with the herbicide and a polyurethane diolame liquid B with the herbicide, respectively spraying the heated polyurethane diolame liquids A and B on the surface of fertilizer grains, and repeatedly coating for 2-6 times after the polyurethane diolame liquids with the herbicide are reacted and cured. The polyurethane diolame controlled-release fertilizer can well inhibit the growth of field weeds and eliminate field plant weeds, and has the double advantages of herbicide and a controlled-release fertilizer.

Description

Technical field [0001] The invention relates to a coated controlled release fertilizer and a preparation method thereof, in particular to a polyurethane coated controlled release fertilizer containing a herbicide and a preparation method thereof. Background technique [0002] In modern agriculture, herbicides and fertilizers have always been the basic materials commonly used in agricultural production. Among them, herbicides are substances used to eliminate the growth of plant weeds; fertilizers are substances that provide at least one nutrient element for crops, improve soil properties, and improve soil fertility. [0003] According to the estimates of the Food and Agriculture Organization of the United Nations, the 55% increase in food production in developing countries is due to the result of chemical fertilizers, and my country basically conforms to this law. As a large agricultural country, my country's rapid growth in agricultural production is of great significance to my co...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/08C05G3/90
Inventor 黎四芳林键
Owner XIAMEN UNIV
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