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Environment-friendly type degradable slow release fertilizer envelope agent and preparing method thereof

A technology of slow-release fertilizers and coating agents, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of complex production process of slow-release fertilizers, inability to popularize and apply them in a large area, poor slow-release and controlled-release effects, etc., and achieve Easy to popularize and apply in a large area, low production cost and low application cost

Inactive Publication Date: 2007-09-12
INST OF SOIL & FERTILIZER SHANDONG ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages: nutrient release is faster, especially in paddy fields or areas with severe leaching, the effect of slow release and controlled release is poor
Disadvantages: high requirements for processing equipment, complicated process, although waste materials can be used, but due to the high cost of organic solvents and raw materials used, poor environmental protection, it cannot be widely used
The methods of these patent documents generally have disadvantages such as poor slow-release and controlled-release effects, complicated production process, and high production cost.
[0011] In short, the main problem affecting the development of slow-release fertilizers at present is the complicated production process and high production cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The degradable slow-release fertilizer coating agent has the following components, all in parts by weight:

[0053] 10 parts of methyl methacrylate, 10 parts of polyvinyl alcohol, 5 parts of dodecyl alcohol, 3 parts of water-based resin, 2 parts of fatty alcohol, 6 parts of cement, and 90 parts of water. Wherein the cementing agent is starch, cooked rubber powder, sodium hydroxide, borax by weight 1 part, 0.5 part, 0.2 part, 0.3 part, and 70 parts of water dissolved at normal temperature in a liquid combination.

[0054] The preparation method is as follows:

[0055] Add 60 parts of water and polyvinyl alcohol into No. 1 reactor by weight, stir and heat up to 90°C to dissolve, and at the same time, add 30 parts of water, methyl methacrylate, dodecyl alcohol fat, water-based resin, fatty alcohol, cement The agent is added to the No. 2 reactor in order by weight, stirred and heated to 40°C to dissolve, and then the solutions of the No. 1 and No. 2 reactors are pumped int...

Embodiment 2

[0057] The preparation method is as described in Example 1, except that the components are as follows, all in parts by weight:

[0058] 12 parts of methyl methacrylate, 6 parts of polyvinyl alcohol, 0.8 parts of lauryl alcohol, 5 parts of water-based resin, 4 parts of fatty alcohol, 3 parts of binder, and 120 parts of water. During the preparation process, 70 parts of water were added to No. 1 reactor, and 450 parts of water were added to No. 2 reactor.

[0059] Wherein the cementing agent is starch, cooked rubber powder, sodium hydroxide, borax according to the weight of 1 part, 1 part, 0.2 part, 0.1 part and the liquid combination after adding 78 parts of water at normal temperature and dissolving.

Embodiment 3

[0061] The preparation method is as described in Example 1, except that the components are as follows, all in parts by weight:

[0062] 6 parts of methyl methacrylate, 8 parts of polyvinyl alcohol, 3 parts of dodecyl alcohol, 0.6 parts of water-based resin, 1 part of fatty alcohol, 5 parts of cement, and 80 parts of water. During the preparation process, 50 parts of water were added to No. 1 reactor, and 30 parts of water were added to No. 2 reactor.

[0063] Wherein the cementing agent is starch, cooked rubber powder, sodium hydroxide, borax by weight 1 part, 1.5 part, 0.2 part, 0.4 part and the liquid combination after adding 85 parts of water at normal temperature and dissolving.

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PUM

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Abstract

This invention relates to an envelope agent of an environment protection degradable slow released fertilizer and its preparation method composed of MMA, PVA, dodecyl alcohol ester, water-base resin, fat alcohol and a binder, in which, compositions are thermal-dissolved in a reaction kettle then cooled and mixed to get a liquid product, which can envelope mineral compositions(CaO, MgO and ZnO) outside of particle fertilizers by a special enveloping machine so as to release nutrition of fertilizer slowly.

Description

technical field [0001] The invention relates to an environment-friendly degradable slow-release fertilizer coating agent and a preparation method thereof, belonging to the technical field of slow-release fertilizers. Background technique [0002] Slow-release fertilizer is a kind of fertilizer with slow-release function produced by physical, chemical and biological methods, new technology, new materials and new process equipment. The nutrient release rate of this kind of fertilizer is basically consistent with the law of crop fertilizer demand, so as to improve the utilization rate of fertilizer resources, enhance the buffer of soil and the stress resistance of crops. [0003] Slow-release fertilizer is a high-quality product among fertilizers and a hope for the development of fertilizer industry; the development of slow-release fertilizer in China is very rapid, and it has entered a new stage of industrial production and popularization and application from the past mainly b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C08L29/04C08K5/10C08L3/02
Inventor 杨果崔荣宗魏建林李彦管力生徐长英孙明
Owner INST OF SOIL & FERTILIZER SHANDONG ACAD OF AGRI SCI
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