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Functional composite coated controlled-release fertilizer with polyolefin wax as priming coat and production method of functional composite coated controlled-release fertilizer

A technology of coating controlled-release fertilizer and polyolefin wax, which is applied in urea compound fertilizer, layered/coated fertilizer, nitrogen fertilizer, etc., can solve the difficulty of asynchronous regulation of nutrient and biostimulant release, and can sustainably develop polymer residual film Slow degradation, affecting the effect of controlled release of fertilizers, etc., to achieve sustainable development, promote environmentally friendly development, and low prices

Active Publication Date: 2018-09-28
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The functional composite film-coated controlled-release fertilizer of the present invention is based on polyolefin wax as the base coat, starch-based polyurethane and epoxy resin composite film, and between the polyolefin wax coating and the starch-based polyurethane layer or the starch-based polyurethane layer Add biostimulant between the epoxy resin layer to realize the functional upgrade of the coated slow-release fertilizer, which solves the problem that the current international controlled-release fertilizer has a single function, high cost, difficult to promote, and extrusion wear during transportation, which seriously affects the fertilizer. Controlled release effect, soil pollution caused by adding harmful dyes, dependence on petrochemical products is difficult for sustainable development, and the key technical problems of slow degradation of excessive polymer film
At the same time, it solves the problems of easy inactivation of biostimulants in direct contact with soil and fertilizers, and difficulty in asynchronous regulation of nutrient and biostimulant release.

Method used

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  • Functional composite coated controlled-release fertilizer with polyolefin wax as priming coat and production method of functional composite coated controlled-release fertilizer
  • Functional composite coated controlled-release fertilizer with polyolefin wax as priming coat and production method of functional composite coated controlled-release fertilizer
  • Functional composite coated controlled-release fertilizer with polyolefin wax as priming coat and production method of functional composite coated controlled-release fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Add 100g of diethylene glycol, 80g of wheat starch and 1g of concentrated sulfuric acid into a three-necked flask equipped with mechanical stirring and a condenser, and stir to make them evenly mixed. React at 140-150°C for 30 minutes, then cool to about 100°C with an ice-water bath. Put 1000g of large granular urea with a diameter of 2-4mm into the drum and heat it to 50-70°C; then pour 1.2g of paraffin evenly, and after about 3-7 minutes, the paraffin is evenly coated; then coat 3.21g of wheat starch mixed with 6.79g of curing agent polymethylene polyphenyl polyisocyanate, sprayed quickly on the surface of urea particles, 8-10 minutes later, it can be directly reacted and solidified on the fertilizer surface to form a film, and the spray film process was repeated 3 times; then 50.0 mg / mL cyclic dipeptide solution, a total of 10mL is sprayed on the outside of the film, and it can be dried after 8-10 minutes. Repeat this process 4 times; then mix 9.55g glycerol epoxy re...

Embodiment 2

[0071] Add 100g of ethylene carbonate, 80g of sweet potato starch and 1.5g of concentrated sulfuric acid into a three-necked flask equipped with a mechanical stirrer and a condenser, and stir to make them evenly mixed. React at 120-130° C. for 30 minutes, and then cool to about 100° C. in an ice-water bath to obtain sweet potato starch coating solution. Put 1000g of potassium chloride particles with a diameter of 2-4mm into the drum, heat to 50-70°C; then pour 2.5g of wood wax evenly, and after about 3-7 minutes, the wood wax is evenly coated; then add 50.0mg / Spray 20 mL of cyclic dipeptide solution on the outside of the film, and dry it after 8-10 minutes. Repeat this process twice; then mix 4.66 g of sweet potato starch coating solution with 5.34 g of curing Mix phenyl polyisocyanate and spray it quickly on the surface of urea granules. After 8-10 minutes, it can be directly reacted and solidified to form a film on the surface of the fertilizer. The spraying process is repe...

Embodiment 3

[0073] Add 80g of polyethylene glycol, 20g of glycerol, 100g of cornstarch and 1g of concentrated sulfuric acid into a three-necked flask equipped with a mechanical stirrer and a condenser, and stir to make them evenly mixed. React at 140-150°C for 45 minutes, then cool to about 100°C with an ice-water bath to obtain a cornstarch coating solution. Put 1000g of large granular urea with a diameter of 2-4mm into the drum and heat it to 50-70°C; then pour 5.7g of paraffin evenly, and after about 3-7 minutes, the paraffin is evenly coated; then coat 4.66g of cornstarch Mix the solution with 5.34g curing agent diphenylmethane diisocyanate, spray it on the surface of urea granules quickly, and after 8-10 minutes, it can be directly reacted and solidified on the surface of the fertilizer to form a film. The spraying process is repeated twice; then 8.06g bisphenol Mix A-type epoxy resin with 1.84g of ethylenediamine, and quickly spray it on the surface of urea granules. After 5-6 minut...

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Abstract

The invention discloses a functional composite coated controlled-release fertilizer with a polyolefin wax as a priming coat. The functional composite coated controlled-release fertilizer comprises fertilizer granules and a coating material, wherein the coating material is sprayed to the surfaces of fertilizer granules; the coating material is composed of a polyolefin wax coating, a starch-based polyurethane layer and an epoxy resin layer which are sequentially sprayed to the surfaces of the fertilizer granules; biological stimulin is sprayed between the polyolefin wax coating and the starch-based polyurethane layer or between the starch-based polyurethane layer and the epoxy resin layer. By adopting the functional composite coated controlled-release fertilizer disclosed by the invention, the technical difficulties that a conventional international controlled-release fertilizer is single in function, high in cost and hard to popularize, the controlled-release effect of the fertilizer can be seriously affected by extrusion abrasion in the transportation process, soil pollution can be caused by harmful dyes, sustainable development is hard to achieve as the fertilizer depends on petrochemicals, and excessive residual macromolecule membranes are resulted and are slow to degrade, can be solved, moreover, the problems that the biological stimulin is liable to deactivation when beingin direct contact with soil and fertilizers, release paces of nutrients and stimulin are hard to regulate and control, and the like, can be solved.

Description

technical field [0001] The invention relates to the field of controlled-release fertilizer production, in particular to a functional compound-coated controlled-release fertilizer with polyolefin wax as an undercoat layer and a production method thereof. Background technique [0002] my country is a large agricultural country, but due to the large population base and the small area of ​​arable land, in order to meet the needs of food growth, a large amount of chemical fertilizers must be used in farming. However, most of the traditional chemical fertilizers are water-soluble, and they are easy to lose and decompose after being applied to the soil. Or fixed, so that the nutrient utilization rate is reduced, a large number of unreasonable fertilizer application not only caused a waste of resources but also caused environmental pollution. The invention, production and use of coated slow-release fertilizers can well solve the problems of waste of resources and environmental pollut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05C9/00C05D1/02C05G5/30
Inventor 刘之广田虹雨张民
Owner SHANDONG AGRICULTURAL UNIVERSITY
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