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Preparation method for biological-optical difunctional degradable slow-releasing membrane for fertilizer

A biodegradable, dual-functional technology, applied in the direction of fertilizer mixture, application, fertilization device, etc., can solve the problems of resin coating that is difficult to degrade, soil quality damage, environmental pollution, etc.

Inactive Publication Date: 2016-02-10
SINOCHEM SHANDONG FERTILIZER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the gradual use of this type of fertilizer, some outstanding problems of the fertilizer itself are gradually exposed, such as: after the use period of the fertilizer, the outer resin coating (such as polyethylene, polypropylene, polystyrene, etc.) Degradation, the continuous accumulation of the resin coating can easily cause soil compaction and soil damage. At the same time, the tiny coating floats into the surrounding environment during the soil plowing process, which has formed environmental pollution. function, and a slow-release coating that degrades rapidly after the period of use is necessary

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 500L trichlorethylene solvent to the coating solution reactor, stir and heat to 100 o C, add 12.55kg of polyethylene, after the polyethylene is completely dissolved, add 12.55kg of polyadipate / butylene terephthalate, 0.075kg of iron stearate, and 0.035kg of oleic acid in sequence, and wait until the above materials are dissolved and mixed After uniformity, continue to add 2kg of calcium carbonate powder, 1kg of zinc sulfate, and 1kg of magnesium sulfate. After stirring evenly, add 0.75kg of ethylene acrylic acid copolymer, keep stirring, and heat to 150 o C, until a uniform coating solution is formed and set aside. Take by weighing 970kg of large particle urea, join in the fluidized bed, open blower fan and air heater, make the large particle urea in the fluidized bed be in boiling state, keep fluidizing air temperature to be 80 o C. Spray the coating liquid onto the surface of large particles of urea. The solvent trichlorethylene is blown and volatilized by hot ai...

Embodiment 2

[0023] Add 1000L trichlorethylene solvent into the coating solution reactor, stir and heat to 100 o C, add polyethylene 25kg, after the polyethylene is completely dissolved, add polyadipate / butylene terephthalate 25kg, iron stearate 0.15kg, oleic acid 0.07kg, after the above materials are dissolved and mixed uniformly , continue to add 4kg of calcium carbonate powder, 2kg of zinc sulfate, and 2kg of magnesium sulfate. After stirring evenly, add 1.5kg of ethylene acrylic acid copolymer, keep stirring, and heat to 150 o C, until a uniform coating solution is formed and set aside. Take by weighing 940kg of large particle urea, join in the fluidized bed, open blower fan and air heater, make the large particle urea in the fluidized bed be in boiling state, keep the vulcanization air temperature to be 80 o C. Spray the coating liquid onto the surface of large particles of urea. The solvent tetrachlorethylene is blown and volatilized by hot air. After subsequent condensation and rec...

Embodiment 3

[0025] Add 1000L trichlorethylene solvent into the coating solution reactor, stir and heat to 100 o C. Add 18kg of polypropylene. After the polyethylene is completely dissolved, add 28kg of polycaprolactone, 0.2kg of iron stearate, and 0.07kg of oleic acid in sequence. After the above materials are dissolved and mixed uniformly, continue to add 6kg of calcium carbonate powder, sulfuric acid Zinc 2kg, magnesium sulfate 2kg, borax 2kg, after stirring evenly, add ethylene acrylic acid copolymer 1.8kg, keep stirring, heat to 150 o C, until a uniform coating solution is formed and set aside. Take by weighing 940kg of large particle urea, join in the fluidized bed, open fan and air heater, make the large particle urea in the fluidized bed be in boiling state, keep the vulcanization air temperature to be 80 o C. Spray the coating liquid onto the surface of large particles of urea. The solvent tetrachlorethylene is blown and volatilized by hot air. After subsequent condensation and r...

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PUM

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Abstract

The invention discloses a formula of a slow-releasing fertilizer coating with a biological-optical difunctional degradable property and a preparation method. The coating material is composed of polyolefin, a biodegradable polymer, a photo-degradation accelerant, an inorganic powder additive, a thermal oxidization accelerant and a crosslinking agent, wherein a solvent is an organic solvent; a preparation method for a coating liquid comprises the steps of: heating a certain amount of solvent to 100-120 DEG C; then successively adding polyolefin, the biodegradable polymer, the photo-degradation accelerant, the thermal oxidization accelerant, the inorganic powder additive and the crosslinking agent in sequence, and continuously stirring the mixture to 140-160 DEG C to form a stable and uniform coating liquid; and coating the coating material to the surface of a fertilizer by using a fluidized bed to form a coating fertilizer, wherein the solvent is recovered. The coating material has a biological and optical difunctional degradable property and prevents secondary pollution brought by the fertilizer coating.

Description

technical field [0001] The invention relates to a method for preparing a fertilizer degradable slow-release coating, in particular to a method for preparing a bio-photobifunctional degradable slow-release film for fertilizers. Background technique [0002] Chemical fertilizer is one of the most important raw materials for agricultural production. In recent years, with the rapid increase of the total population and the decrease of arable land, the contradiction between supply and demand of food has been intensified, making agriculture increasingly dependent on chemical fertilizers. However, with the use of chemical fertilizers In the process of increasing, the effective utilization rate of ordinary conventional fertilizers has not been effectively improved. The large loss of chemical fertilizers in the use process has led to a great waste of non-renewable resources on the one hand, and environmental pollution on the other hand. In order to effectively improve the utilization ...

Claims

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Application Information

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IPC IPC(8): C05G3/00
Inventor 朱年祥曲树栋李洪顺焦卫平苗全青李乾和朱志锋张国林阚洪福
Owner SINOCHEM SHANDONG FERTILIZER
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