Coating agent and preparation method thereof

A technology of coating agent and disintegrating agent, applied in the field of coating agent and its preparation, can solve the problems of destroying soil structure, difficult degradation of coating agent, and poor slow and controlled release effect.

Inactive Publication Date: 2018-09-11
陈建峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a coating agent and its preparation method in view of the problems that the commonly used coating agent is difficult to degrade in soil, long-term application will destroy the soil structure, and the slow and controlled release effect is poor.

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0019] Preparation of polyurethane emulsion: in parts by mass, take 4 to 10 parts of dimer acid polyester diol, dry in vacuum, add 5 to 12 parts of polyisocyanate and 3 to 7 parts of isophorone diisocyanate, and control the temperature at 80~90℃, stirring reaction for 2~2.5h, cooling down to 40~50℃, adding 5~8 parts of acetone, 8~17 parts of 1,4-butanediol, 10~15 parts of dimethylol propionic acid, stirring Mix, control the temperature at 65~70℃, react for about 3~4h, add 3~10 parts of acetone, cool down to 25~30℃, add 5~10 parts of triethylamine, 18~25 parts of water, and use 110~120r / min stirring to obtain polyurethane emulsion.

[0020] A kind of preparation method of coating agent comprises the steps:

[0021] (1) According to the number of parts by mass, take 6~13 parts of slow-release component compound, 5~10 parts of sodium carboxymethyl starch, 2~6 parts of polyvinylpyrrolidone, 7~14 parts of surfactant, 30~40 parts Deionized water, 8~15 parts of polyurethane emulsi...

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PUM

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Abstract

The invention discloses a coating agent and a preparation method thereof, and belongs to the field of chemical industry. The preparation method comprises the following steps: taking 6-13 parts of a sustained-release component complex, 5-10 parts of a disintegrant, 7-14 parts of a surfactant, 30-40 parts of deionized water, 8-15 parts of a polyurethane emulsion, 5-10 parts of tannin acid; stirringand mixing the above components at 20-25 DEG C, heating to 110-120 DEG C, carrying out heat insulation for 1.5-2h, cooling to 30-40 DEG C, adding the polyurethane emulsion and tannic acid, stirring and mixing, and cooling to 20-25 DEG C to obtain the coating agent. The problem that commonly used coating agents are difficult to degrade in the soil, will destroy the soil structure after long-term application and have poor controlled release effect is solved in the invention.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a coating agent and a preparation method thereof. Background technique [0002] Because traditional chemical fertilizers are prone to leaching and volatilization in the soil, it causes serious loss of fertilizer nutrients and serious environmental pollution; on the other hand, with the increase of labor costs, many times The use of traditional chemical fertilizers keeps the cost of agricultural production high. Slow-release fertilizers have the advantages of reducing the frequency of fertilization, increasing the utilization rate of fertilizers, and reducing the production cost of agriculture and forestry. The development and production of coated fertilizers have been carried out successively at home and abroad. [0003] Currently commonly used coating materials are polyolefin, ethylene-vinyl acetate copolymer, alkyd resin, sulfur powder, chitosan, polyvinyl alcohol,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05G5/30
Inventor 陈建峰陈炎刘红妹
Owner 陈建峰
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