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Preparation method of urea formaldehyde and polyolefin coating material of fertilizers

A coating material, polyolefin technology, applied in fertilizer mixtures, layered/coated fertilizers, fertilization devices, etc., can solve the problems of human food pollution, resource waste, economic loss, fertilizer loss, etc., and achieve a simple and easy preparation method. Industrialized production, the effect of a wide range of sources

Inactive Publication Date: 2017-03-22
王兵
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in recent years, due to the loss and inefficient use of fertilizers, serious resource waste and huge economic losses have been caused, and more importantly, serious pollution has been caused to the human body, the atmosphere, soil and food

Method used

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  • Preparation method of urea formaldehyde and polyolefin coating material of fertilizers

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Effect test

Embodiment 1

[0009] A preparation method of urea-formaldehyde and polyolefin as a fertilizer coating material, comprising the following raw materials in parts by weight: 80 parts of urea-formaldehyde, 20 parts of polyolefin, and 5 parts of crosslinking agent. Put parts by weight of urea-formaldehyde and polyolefin in a reaction kettle, add water to stir and mix evenly, heat to 80°C, gelatinize, then add parts by weight of cross-linking agent, reflux at 100°C to make cross-linking Afterwards, stirring, cooling and discharging to obtain a dispersion of urea-formaldehyde and polyolefin coating material in water. The prepared urea-formaldehyde / polyolefin coating material aqueous dispersion is coated on the surface of fertilizer particles by spraying to prepare a coated slow-release fertilizer.

Embodiment 2

[0011] A preparation method of urea-formaldehyde and polyolefin as a fertilizer coating material, comprising the following raw materials in parts by weight: 70 parts of urea-formaldehyde, 10 parts of polyolefin, and 3 parts of crosslinking agent. Put parts by weight of urea-formaldehyde and polyolefin in a reaction kettle, add water to stir and mix evenly, heat to 70°C, gelatinize, then add parts by weight of cross-linking agent, reflux at 90°C to make cross-linking Afterwards, stirring, cooling and discharging to obtain a dispersion of urea-formaldehyde and polyolefin coating material in water. The prepared urea-formaldehyde / polyolefin coating material aqueous dispersion is coated on the surface of fertilizer particles by spraying to prepare a coated slow-release fertilizer.

Embodiment 3

[0013] A preparation method of urea-formaldehyde and polyolefin as a fertilizer coating material, comprising the following raw materials in parts by weight: 75 parts of urea-formaldehyde, 15 parts of polyolefin, and 3 parts of crosslinking agent. Put parts by weight of urea-formaldehyde and polyolefin in a reaction kettle, add water, stir and mix evenly, heat to 70°C, gelatinize, then add parts by weight of cross-linking agent, and reflux at 100°C to make cross-linking Afterwards, stirring, cooling and discharging to obtain a dispersion of urea-formaldehyde and polyolefin coating material in water. The prepared urea-formaldehyde / polyolefin coating material aqueous dispersion is coated on the surface of fertilizer particles by spraying to prepare a coated slow-release fertilizer.

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Abstract

The invention belongs to the technical fields of materials and fertilizers, and particularly relates to a preparation method of a urea formaldehyde and polyolefin coating material of fertilizers. The coating material comprises the following raw materials in parts by weight: 70 to 80 parts of urea formaldehyde, 10 to 20 parts of polyolefin and 1 to 5 parts of a cross-linking agent. The preparation method comprises the steps of putting urea formaldehyde and polyolefin into a reaction kiln in parts by weight, adding water, carrying out uniform stirring and mixing, heating the mixture to 70 DEG C to 80 DEG C, carrying out gelatinization, adding the cross-linking agent in parts by weight, and carrying out reflux at the temperature of 90 DEG C to 100 DEG C to enable the materials to perform cross-linking reaction; and then, carrying out stirring and cooling discharge, so as to obtain a dispersion liquid of the urea formaldehyde and polyolefin coating material in water. Slow and controlled release fertilizers of different release periods can be prepared through adjustment of component composition of the coating material and ratio of the coating material to fertilizer particles. According to the prepared slow and controlled release fertilizers, the utilized raw materials are wide in source, cheap, and easy to obtain, the preparation method is simple, the slow and controlled release effect is excellent, and industrial production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of materials and fertilizers, and in particular relates to a preparation method of urea-formaldehyde and polyolefin as a coating material for fertilizers. Background technique [0002] With the development of science and technology, higher requirements are put forward for the performance of fertilizers. Fertilizer is one of the most important means of production in agricultural production and the cornerstone of sustainable agricultural development. However, in recent years, due to the loss and inefficient use of fertilizers, serious waste of resources and huge economic losses have been caused, and more importantly, serious pollution has been caused to the human body, the atmosphere, soil and food. Therefore, how to improve the utilization rate of fertilizers and organically combine the application of fertilizers with the yield, quality and environmental protection of crops has become the focus of special at...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05G5/37
Inventor 王兵董木琴
Owner 王兵
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