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Environment-friendly sulfur coated type slow-release chemical fertilizer

A coating and chemical fertilizer technology, applied in the direction of layered/coated fertilizers, fertilization devices, fertilizer mixtures, etc., can solve the problems of unstable release period, poor impact resistance, large dosage, etc., and achieve long release period. , low cost, stable release period

Inactive Publication Date: 2018-06-29
王刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the impact resistance of this environmentally friendly sulfur-coated slow-release chemical fertilizer is not very good, and the release period is not very stable, or to achieve good release period stability, epoxy resin, polyurethane, and unsaturated polyester are used. The amount of polymers such as polyolefins or degradable polymers is still relatively large, and the cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0015] An environmentally friendly sulfur-coated slow-release chemical fertilizer, which is composed of a fertilizer core and a fertilizer core outer coating, the coating contains a sulfur film layer, and a degradable polymer-organic polymer powder composite film layer; wherein, the sulfur film layer is the whole The inner layer or middle layer of the coating, the outer layer of the coating is a composite film layer of degradable polymer-organic polymer powder, and the outer surface of the coating is an uneven surface with organic polymer powder protrusions.

[0016] The average particle size of the organic polymer powder in the degradable polymer-organic polymer powder composite film layer in the entire outer layer of the envelope is larger than the reduced thickness of the degradable polymer-organic polymer powder composite film layer.

[0017] The organic polymer powder is one or more of plant powder, animal powder and synthetic polymer powder.

[0018] Plant powder is one ...

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PUM

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Abstract

The invention relates to an environment-friendly sulfur coated type slow-release chemical fertilizer which consists of a chemical fertilizer core and a chemical fertilizer coating. The chemical fertilizer is characterized by comprising sulfur membrane layer and a degradable polymer-organic polymer powder composite membrane layer, wherein the sulfur membrane layer is an inner layer or a middle layer of the whole coating; the degradable polymer-organic polymer powder composite membrane layer is an outer layer of the coating; the outer surface of the coating is a concave-convex uneven surface with convex organic polymer powder. The sulfur membrane layer of the environment-friendly sulfur coated type slow-release chemical fertilizer provided by the invention is not easily damaged in the packaging, transportation and application process, and the chemical fertilizer is stable in release period.

Description

technical field [0001] The invention relates to a coated slow-release chemical fertilizer, in particular to an environment-friendly sulfur coated slow-release chemical fertilizer, which belongs to the field of chemical fertilizer industry. Background technique [0002] Slow-release fertilizer is the development direction of the world's fertilizer industry. Environmentally friendly sulfur-coated slow-release fertilizers are an important type of slow-release fertilizers, and are currently the most widely used coated slow-release fertilizers. [0003] Because sulfur is brittle and has poor impact resistance and poor film-forming properties, it is easy to have holes. The slow-release fertilizer made by simply using sulfur coating has a short release period and poor stability. Therefore, environmentally friendly sulfur-coated slow-release fertilizers are usually used in sulfur The film layer is covered with an organic polymer film layer. The organic polymers used include epoxy r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/08C05G3/90
CPCC05G3/00C05G3/90C05G5/30C05G5/35C05G5/36
Inventor 王刚
Owner 王刚
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