Fat-mass film-coated slow-release fertilizer

A coating and chemical fertilizer technology, which is applied in fertilization devices, fertilizer mixtures, agriculture, etc., can solve the problems of high penetrating ability of amino resin, short release period of slow-release chemical fertilizer, and no practical value, and achieves low cost and low cost. , the effect of high resistance to fertilizer

Inactive Publication Date: 2010-05-26
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Amino resin is a slow-release nitrogen fertilizer. The fertilizer-coated slow-release fertilizer can be made by using amino resin coating, but the amino resin has a large fertilizer penetration ability, and the release period of the slow-release fertilizer made by using pure amino resin coating alone is too short. , has no real practical value

Method used

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  • Fat-mass film-coated slow-release fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add spherical industrial urea with a particle size of 2.0 to 3.0mm into the drum coating equipment, rotate the drum to make the spherical urea in a flowing state, and keep the temperature of the spherical urea in the drum at 95°C. Slowly spray the polyvinyl alcohol-modified urea-formaldehyde resin prepolymer aqueous solution containing montmorillonite (SM-LV type) on the surface of spherical urea until the polyvinyl alcohol-modified urea-formaldehyde resin-montmorillonite composite film is formed. (The mass ratio of montmorillonite: polyvinyl alcohol-modified urea-formaldehyde resin is 1:99) The quality reaches 20% of the total mass of the finished fertilizer-coated slow-release urea. Fully dry to remove water in the film layer, and fully solidify the polyvinyl alcohol modified urea-formaldehyde resin in the film layer to obtain the fertilizer-coated slow-release urea of ​​the present invention.

Embodiment 2

[0030] Add spherical industrial urea with a particle size of 2.0 to 3.0mm into the drum coating equipment, rotate the drum to make the spherical urea in a flowing state, and keep the temperature of the spherical urea in the drum at 95°C. Slowly spray the polyvinyl alcohol-modified urea-formaldehyde resin prepolymer aqueous solution containing montmorillonite (SM-LV type) on the surface of spherical urea until the polyvinyl alcohol-modified urea-formaldehyde resin-montmorillonite composite film is formed. (The mass ratio of montmorillonite: polyvinyl alcohol modified urea-formaldehyde resin is 1: 49) The quality reaches 20% of the total mass of the finished fertilizer coated slow-release urea. Fully dry to remove water in the film layer, and fully solidify the polyvinyl alcohol modified urea-formaldehyde resin in the film layer to obtain the fertilizer-coated slow-release urea of ​​the present invention.

Embodiment 3

[0032] Add spherical industrial urea with a particle size of 2.0 to 3.0mm into the drum coating equipment, rotate the drum to make the spherical urea in a flowing state, and keep the temperature of the spherical urea in the drum at 95°C. Slowly spray the polyvinyl alcohol-modified urea-formaldehyde resin prepolymer aqueous solution containing montmorillonite (SM-LV type) on the surface of spherical urea until the polyvinyl alcohol-modified urea-formaldehyde resin-montmorillonite composite film is formed. (The mass ratio of montmorillonite: polyvinyl alcohol-modified urea-formaldehyde resin is 1:9) reaches 20% of the total mass of the final finished fertilizer-coated slow-release urea. Fully dry to remove water in the film layer, and fully solidify the polyvinyl alcohol modified urea-formaldehyde resin in the film layer to obtain the fertilizer-coated slow-release urea of ​​the present invention.

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Abstract

The invention discloses a fat-mass film-coated slow-release fertilizer comprising a fertilizer core and a fertilizer core outer capsule. The capsule is an amine resin-montmorillonite composite film or a composite layer of the amine resin-montmorillonite composite film and a degradable polymer film and can be compounded with a sulfur film and/or a high-resistance permeable organic film layer with preferable thickness not more than 20um; high-resistance permeable organic matter can be also mixed in the amine resin-montmorillonite composite film; the mass fraction of the montmorillonite in the high-resistance permeable organic film layer is preferably not more than 50% and optimally 0.5-30%; the total thickness of the capsule is preferably not less than 30um; and the thickness of the sulfur film is preferably 0-50um. The capsule body of the fat-mass film-coated slow-release fertilizer is (basically) harmless to the environment, is a fertilizer constituent and has low cost and long release period.

Description

1. Technical field [0001] The invention relates to a coating-type slow-release chemical fertilizer, in particular to a fertilizer-coated slow-release chemical fertilizer, which belongs to the field of chemical fertilizer industry. 2. Background technology [0002] Slow-release chemical fertilizers meet the requirements of environmental protection and sustainable agricultural development, and are the development direction of agricultural chemical fertilizers in the world. Among them, coated slow-release chemical fertilizers will be the mainstream of slow-release chemical fertilizers in the future. However, the coatings of the current coated slow-release fertilizer products are useless to crops, and most of them cannot be degraded by the environment and will remain in the soil to pollute the environment, such as epoxy resin, polyurethane, polyethylene, polypropylene, polyvinyl chloride, etc. The fertilizer plastid is used as the coating, which is harmless to the environment an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
Inventor 应宗荣彭永才刘海生
Owner NANJING UNIV OF SCI & TECH
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