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Organic polymer coating material as well as method of coating fertilizer by using coating material

A technology of coating materials and polymers, applied in the direction of fertilizer mixture, application, fertilization equipment, etc., can solve the problems of large-scale production, etc., and achieve the effect of low price, fast coating speed and wide source of raw materials

Active Publication Date: 2014-01-22
NINGXIA VIKO GREEN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 1974, academician Li Qingxuan of the Nanjing Soil Research Institute of the Chinese Academy of Sciences and others mixed 5% dolomite cooked powder into ammonium bicarbonate, granulated with a double-roller granulator, polished in a drum or disc, and granulated fertilizer with phosphoric acid. The surface is acidified, coated with calcium magnesium phosphate fertilizer powder with low solubility, covered with molten paraffin-asphalt, and then made into a slow-release ammonium bicarbonate coated fertilizer, which provides the fertilizer needed for rice growth and has a good yield-increasing effect. It not only effectively inhibits ammonia volatilization, and has a good fertilizer effect, but has not formed a large-scale production

Method used

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Examples

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Effect test

preparation example Construction

[0024] A method for preparing organic polymer coating materials and coating various granular fertilizers is carried out in sequence as follows:

[0025] a. First put the granular fertilizer in the suspension tank, spray an appropriate amount of atomized water to moisten the surface of the granular fertilizer, add the attapulgite clay and potassium dihydrogen phosphate or the raw material powder that provides phosphorus, potassium and other nutrients into the suspension tank, They are evenly wrapped on the surface of granular fertilizer;

[0026] b. Preheat the granular fertilizer to 40-80℃;

[0027] c. Heat the alkyl epoxy resin branch polyether to 40-60°C in a closed light-shielding tank, and then spray it evenly on the preheated fertilizer surface in the suspension tank in the form of atomization through a pressure nozzle;

[0028] d. Pass the polyamide curing agent liquid through a pressure nozzle and spray it uniformly on the preheated fertilizer surface in the suspension tank in ...

Embodiment 1

[0032] Add 200 kg of 2-4 cm microelement fertilizer particles (copper-zinc particles, 10% copper, 5% Zn, purchased from Henan Lifu Technology Co., Ltd.) into the suspension tank, according to the granular fertilizer, atomized water, bump The weight ratio of the rod clay and the raw material powder that provides phosphorus and potassium nutrients is 9:0.5:0.3:0.2. The sprayed water wets the surface of the granular fertilizer. Add the attapulgite clay and potassium dihydrogen phosphate powder into the suspension tank and wrap them evenly On the surface of the granular fertilizer, heat to 40°C, and then heat 4 kg of cycloaliphatic epoxy resin in a closed light-shielding tank to 40°C, and then spray it evenly into the suspension tank in the form of atomization through a pressure nozzle. Hot fertilizer surface, then 1.5 kg of polyamide curing agent liquid is sprayed evenly on the surface of the preheated fertilizer in the suspension tank in the form of atomization through the pressur...

Embodiment 2

[0035] Add 200 kg of 2-4 cm fertilizer (large granular urea) granules into the suspension tank, and the weight ratio of the granular fertilizer, atomized water, attapulgite clay, and the raw material powder that provides phosphorus and potassium nutrients is 9:0.5:0.3: 0.2. Spray water to wet the surface of the granular fertilizer, add the attapulgite clay and potassium phosphate potassium nitrate powder into the suspension tank, wrap them evenly on the surface of the granular fertilizer, heat it to 60℃, and then add 9 kg of alicyclic epoxy resin Heated to 50℃ in a closed light-shielding tank, then sprayed uniformly on the preheated fertilizer surface in the suspension tank in the form of atomization through a pressure nozzle, and then 2.7 kg of polyamide curing agent liquid was passed through the pressure nozzle to mist Spray evenly on the surface of the preheated fertilizer in the suspension tank, and spray 2.7 kg of liquid paraffin melted at 120°C evenly on the surface of the...

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Abstract

The invention relates to an organic polymer coating material as well as a method of coating a fertilizer by using the coating material. The organic polymer coating material is characterized by comprising the following components in percent by weight: 10%-32% of a polyamide curing agent, 8%-20% of paraffin and the balance being cycloaliphatic epoxy resin. The invention provides an organic polymer coating material which is cheap, free from white pollution and capable of precisely controlling degradation rate and time, and has dewatering and water-blocking functions. The invention further provides a method of uniformly spraying an organic polymer, the curing agent and a sealing material on various granulated fertilizer surfaces to form an organic-polymer-coated granulated fertilizer which has a controlled release function. The coated fertilizer prepared by using the method disclosed by the invention has a nutrient release period of 2-3 months, can promote the degradation of putamina in soil and does not damage a soil structure and a plant root. Besides, the coating speed is high, the yield is high and the cost is low.

Description

Technical field [0001] The invention relates to an organic polymer coating material and a method for coating fertilizer with the organic polymer coating material. Background technique [0002] Coated fertilizer is a granular fertilizer of elemental or compound fertilizer as the core, and the surface is coated with a layer of low water-soluble inorganic substances or organic polymers, or the fertilizer is evenly integrated and decomposed into the polymer by chemical methods to form a porous network system , And can set various mechanisms and measures in advance according to the degradation of the polymer, so that the fertilizer nutrient release law is basically synchronized with the crop nutrient absorption; that is, the release mode is usually to promote the release during the rapid growth of the crop. The slow release mode is achieved when the plant grows slowly or stops. This ensures that the release mode of fertilizer is basically the same as the law of crop absorption, so as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
Inventor 李刚
Owner NINGXIA VIKO GREEN TECH CO LTD
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