Polymer coated controlled release fertilizer based on water-based reaction for forming films and preparation method thereof

Abstract

The invention provides a polymer coated controlled release fertilizer based on water-based reaction for forming films and a preparation method thereof. The polymer coated controlled release fertilizer comprises fertilizers and high polymer coating. The fertilizer is characterized in that the high polymer coating comprises the following raw materials in parts by mass: 100 parts of acrylic monomers, 10-16 parts of emulsifiers, 0.5-1.2 parts of initiators, 50-200 parts of water, 0-30 parts of organosilicon and 0-5 parts of crosslinking agents; and the raw materials of the high polymer coating account for 5-15% of the fertilizer by mass. The preparation process comprises preparation of coating mother liquid, preparation of coating liquid and preparation of the coated fertilizer. Release of the fertilizer nutrients is effectively controlled and the fertilizer nutrients can be continuously released for more than 30 days in the water at 25 DEG C. In the invention, the acrylic substance is used as the coated polymer body, water-based reaction for forming films is adopted to produce the polymer coating and secondary pollution caused by organic solvents does not exist in the production process. In addition, the hydrophobicity of the coated materials is effectively controlled and the controlled release effect is good.

Description

Polymer-coated controlled-release fertilizer based on water-based reaction film-forming technology and preparation method thereof technical field The invention belongs to the technical field of fertilizer manufacture, and in particular relates to a polymer-coated controlled-release fertilizer based on water-based reaction film-forming technology, and a preparation method of the coated controlled-release fertilizer. Background technique Controlled-release fertilizers can effectively improve nutrient utilization, reduce environmental effects, and save labor, and are widely used in horticultural plants and economic crops. At present, the controlled release of fertilizer nutrients can be divided into three categories: one is to make fertilizer into organic nitrogen compounds, the other is encapsulation method, and the third is carrier method. Each has many realization mechanisms, and the use of polymers to coat fertilizers is a kind of encapsulation method, and it is also the ...

AI Technical Summary

Problems solved by technology

Although the controlled release effect of the above polymer-coated fertilizers is better, these polymers are either difficult to degrade themselves [1]、[2] , and most of the organic solvents are used in the production process [3]、[4]、[5] , which may lead to secondary pollution

In recent years, replacing organic solvents with water has become an important development direction in the coating industry [6]、[7] , but due to the hydrophilicity of the coating, the controlled release effect of nutrients is not ideal

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