Biodegradation sustained-release fertilizer coating material containing soybean oil polyhydric alcohol and preparation process thereof

A technology of soybean oil polyol and coating material, applied in the field of controlled release fertilizer, can solve the problems of unreachable, poor strength and stability of starch coating material, poor controlled release performance, etc. The effect of better thermal decomposition and thermal oxidation performance and lower swelling property

Active Publication Date: 2014-05-07
MAOSHI AGRI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The strength and stability of the starch-coated material are poor, and the controlled-release performance is poor, which cannot meet the requiremen

Method used

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  • Biodegradation sustained-release fertilizer coating material containing soybean oil polyhydric alcohol and preparation process thereof
  • Biodegradation sustained-release fertilizer coating material containing soybean oil polyhydric alcohol and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1

[0034] (1) Preparation of biodegradable controlled-release fertilizer coating material

[0035] Add 24 kg of soybean oil polyol and 11 kg of isocyanate (the amount of coating material corresponding to 1 ton of urea) into the reaction kettle, stir at 68 ° C for 8 s, and mix evenly to obtain a biodegradable slow and controlled release containing soybean oil polyol Fertilizer coating material.

[0036] (2) Preparation of coated slow-release fertilizer

[0037] Add granular urea with a particle size of 2-4.7mm into a high-efficiency coating machine and heat it to about 65°C, and pump the prepared slow-and-controlled-release fertilizer coating material containing soybean oil polyol biodegradation into the continuously moving fertilizer in batches On the surface, the coating material is quickly and evenly distributed on the surface of each fertilizer, the input amount of the coating material is 1wt% of the total weight of the granular fertilizer, and the coating...

Example Embodiment

[0043] Example 2

[0044] (1) Preparation of biodegradable controlled-release fertilizer coating material

[0045] Add 18.5 kg of soybean oil polyol and 5.5 kg of castor oil into the reaction kettle, mix and stir for 6 minutes, then add 11 kg of isocyanate, and stir at 70 ° C for 10 s to obtain a slow-controlled release fertilizer bag containing soybean oil polyol biodegradation. clothing material.

[0046] (2) Preparation of coated slow-release fertilizer

[0047] Add granular urea with a particle size of 2-4.7mm into a high-efficiency coating machine and heat it to about 68°C, and pump the prepared slow-and-controlled-release fertilizer coating material containing soybean oil polyol biodegradation into the continuously moving fertilizer in batches On the surface, the coating material is quickly and evenly distributed on the surface of each fertilizer, the input amount of the coating material is 1wt% of the total weight of the granular fertilizer, and the coating is repeate...

Example Embodiment

[0052] Example 3

[0053] (1) Preparation of biodegradable controlled-release fertilizer coating material

[0054] Add 15kg of soybean oil polyol, 3.5kg of castor oil, and 5.5kg of polyether polyol into a reaction kettle, mix and stir for 8 minutes, then add 11kg of isocyanate, and stir at 72°C for 10 seconds to obtain the biodegradable soybean oil-containing polyol. slow-release fertilizer coating material.

[0055] (2) Preparation of coated slow-release fertilizer

[0056] Add granular urea with a particle size of 2-4.7mm into a high-efficiency coating machine and heat it to about 70°C, and pump the prepared slow-and-controlled-release fertilizer coating material containing soybean oil polyol biodegradation into the constantly moving fertilizer in batches On the surface, the coating material is quickly and evenly distributed on the surface of each fertilizer, the input amount of the coating material is 2wt% of the total weight of the granular fertilizer, and the coating is...

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Abstract

The invention relates to a biodegradation sustained-release fertilizer coating material containing soybean oil polyhydric alcohol and a preparation process thereof. The coating material is prepared by stirring a material A and a material B for 5s to 15s under the condition of 65 to 75 DEG C, wherein the material A accounts for 50 to 75 percent of the weight of the coating material, and the material B accounts for 25 to 50 percent of the weight of the coating material; the material A is one or combination of soybean oil polyhydric alcohol, polyether polyhydric alcohol and castor oil, and the material B is isocyanate. The soybean polyhydric alcohol prepared from the soybean oil which is low in price and easy to obtain is strong in water resistance, the coating material which is prepared from multiple functional groups and isocyanate is high in strength and biological degradability and environmentally friendly. By adopting the coating technology, no special equipment is needed, so that not only can the equipment investment cost be greatly reduced, but also the waste of solvent in the recycling process can be avoided, and the biodegradation sustained-release fertilizer coating material is free from polluting the soil, plants and the environment after being utilized for a long time.

Description

technical field [0001] The invention relates to a biodegradable slow-release fertilizer coating material containing soybean oil polyols and a preparation process thereof, belonging to the technical field of controlled-release fertilizers. Background technique [0002] my country is the largest country in the use of fertilizers. The low utilization rate of fertilizers not only causes an astonishing waste of resources, but also causes serious pollution to the environment. Therefore, my country urgently needs the promotion and popularization of new fertilizers. The emergence of slow and controlled release fertilizers has improved the utilization rate of fertilizers, which is conducive to reducing environmental pollution, ensuring food security, and also meeting the actual needs of farmers. The so-called "slow release" means that the release rate of chemical substances and nutrients is much lower than the release rate of instant fertilizers converted into available plant nutrien...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/36C08G18/48C05G3/00
CPCC05G5/00C08G18/36C08G18/4804C08G18/4891C08G18/6696
Inventor 钟成虎崔涛于红梅李欣吕琳琳张航
Owner MAOSHI AGRI TECH CO LTD
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