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A biodegradable slow-release fertilizer coating material containing soybean oil polyol and its preparation process

A soybean oil polyol and coating material technology, applied in the field of controlled-release fertilizers, can solve the problems of poor strength and stability of starch-coated materials, poor controlled-release performance, and unreachable performance, and achieve thermal decomposition and heat resistance. Better oxidation performance, low swelling, and low production cost

Active Publication Date: 2016-07-20
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 requirements of the national standard GB / T23348-2009 for slow-release fertilizers and the industry standard HG / T4215-2011 for controlled-release fertilizers.

Method used

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  • A biodegradable slow-release fertilizer coating material containing soybean oil polyol and its preparation process
  • A biodegradable slow-release fertilizer coating material containing soybean oil polyol and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0035] Add 24kg of soybean oil polyol and 11kg of isocyanate (the amount of coating material corresponding to 1 ton of urea) into the reaction kettle, stir at 68°C for 8s, and mix well to prepare a biodegradable slow-controlled release product 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 the high-efficiency coating machine and heat it to about 65°C, and pump the prepared slow-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 to the surface of each fertilizer, and the input amount of the coating material is 1wt% of the total weight of the granular fertilizer, and it is repeatedly coated until the coating m...

Embodiment 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 reactor, mix and stir for 6 minutes, then add 11 kg of isocyanate, and stir for 10 seconds at 70°C to prepare a biodegradable slow-release fertilizer bag containing soybean oil polyol clothing material.

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

[0047] Add granular urea with a particle size of 2-4.7mm into the high-efficiency coating machine and heat it to about 68°C, and pump the prepared slow-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 to the surface of each fertilizer. The input amount of the coating material is 1wt% of the total weight of the granular fertilizer, and it is repeatedly coated until the coating material accounts for 4% of the...

Embodiment 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 the reaction kettle, mix and stir for 8 minutes, then add 11kg of isocyanate, and stir for 10s at 72°C to obtain a biodegradable polyol containing soybean oil 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 the high-efficiency coating machine and heat it to about 70°C, and pump the prepared slow-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 to the surface of each fertilizer, and the input amount of the coating material is 2wt% of the total weight of the granular fertilizer, and it is repeatedly coated until the coating material ...

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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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Patent Type & Authority Patents(China)
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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