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Water polymer integument and method for preparing integument controlled-release fertilizer thereof

A water-based polymer, film-coated controlled-release fertilizer technology, applied in fertilizer forms, fertilizer mixtures, fertilization devices, etc., can solve problems such as unseen use, achieve good controlled-release effects, reduce production costs, and improve pertinence. Effect

Inactive Publication Date: 2008-05-21
吉林省沃野生态环境治理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water-based polymer-coated controlled-release fertilizer involved in the present invention has not been reported at home and abroad, and has not been used in China.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The invention provides a polymer-coated controlled-release fertilizer and a preparation method thereof. The polymer-coated controlled-release fertilizer is a new type of degradable emulsion polymer film material which accounts for 3% to 15% of the total weight of the granular fertilizer coated on the surface of the granular fertilizer.

[0026] The series of emulsion polymer materials involved in the present invention are one or more of acrylate and its copolymer emulsion, styrene and its copolymer emulsion, vinyl acetate and its copolymer emulsion.

[0027] The preparation method of a new type of polymer emulsion coating material: add 100-150 parts of water and 0.5-2 parts of emulsifier into the reaction kettle, heat, stir, and pass nitrogen, and when the temperature rises to 70-90 ° C, 100 parts The mixed monomers and 0.5 parts of initiator were added dropwise into the reaction kettle, and the polymerization reaction was initiated under sufficient stirring. React for...

Embodiment 1

[0040] Add 100 parts of deionized water, 0.5 parts of sodium lauryl sulfate, and 0.5 parts of OP-10 into the reaction kettle, heat, stir and blow nitrogen. When the temperature rises to 82°C, 100 parts of mixed monomers (methyl methacrylate: ethyl acrylate: hydroxyethyl acrylate: butyl methacrylate by weight ratio 45:45:7:3), 0.5 parts Ammonium persulfate was added dropwise to the reactor to initiate polymerization. React for 4 hours to obtain an emulsion polymer, which is cooled for use. 1000g of granular urea with a diameter of 4mm is charged into the fluidized bed and heated at 88°C. Spray castor oil on the surface of granular urea, and the thickness of the castor oil film is about 5 μm. Then, with a two-fluid nozzle at an atomization pressure of 4kpa, the polymer emulsion is sprayed on the surface of the granular castor oil film layer with a speed of 2g per minute, and fully dried to remove water in the film layer, which is prepared using a polymer emulsion coating. Fil...

Embodiment 2

[0042] Add 100 parts of deionized water, 0.5 parts of sodium lauryl sulfate, and 0.5 parts of OP-10 into the reaction kettle, heat, stir and blow nitrogen. When the temperature rises to 74°C, 100 parts of mixed monomers (butyl acrylate: methyl methacrylate: ethyl acrylate: butyl methacrylate: methacrylic acid: hydroxyethyl methacrylate in parts by weight ratio 41:38:16:4:1:1), 0.5 part of ammonium persulfate was added dropwise into the reactor to initiate polymerization. React for 3 hours to obtain an emulsion polymer, which is cooled for use. Put 1500g of granular urea with a diameter of 3mm into the fluidized fluidized bed and heat at 90°C. Palm oil is sprayed on the surface of granular urea, and the thickness of the sprayed palm oil film is about 5 μm. Then, spray the polymer emulsion on the surface of the granular palm oil film layer at a rate of 2g per minute at an atomization pressure of 4kpa with a two-fluid nozzle, fully dry and remove the water in the film layer, an...

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Abstract

The invention discloses a water-based polymer coated film and a preparation method of a film-coated controlled release fertilizer thereof, which belongs to the agricultural controlled release fertilizer preparation technical field and relates to using a novel water-emulsion type polymer. The polymer film-coated controlled release fertilizer is coating a layer of novel degradable latex polymer film layer on the surface of granular fertilizer. The granular fertilizer with the diameter of 2 to 5mm is packed inside a film coating device of a rotating drum or a fluidized bed, and the granular fertilizer flows inside the film coating device to be heated to 80 DEG C to 100 DEG C. Organic matter is sprayed on the surface of the granular fertilizer, then complex polymer latex is sprayed on the facial surface of the organic matter film layer of the granular fertilizer to be dried continuously, the water of the film layer is removed by complete drying, and the polymer latex film-coated controlled release fertilizer is obtained. The invention conquers the problem that organic solvent leaks to cause the environmental pollution during the process of the production and avoids the problems of solvent recycling; the manufacturing process is easy for realizing the large scale chemical industry production; the investment cost is low; the production cost is reduced greatly.

Description

technical field [0001] The invention belongs to the technical field of preparation of agricultural controlled-release fertilizers. In particular, it relates to a water-based polymer coating using a novel water-emulsion polymer and a method for preparing the coated controlled-release fertilizer. Background technique [0002] my country is a large agricultural country, and the proportion of chemical fertilizers in agricultural production investment accounts for about 50%, but the seasonal utilization rate of fertilizers in our country is only about 30%, resulting in huge waste of economic energy and various environmental problems. Therefore, controlled-release fertilizers that can regulate nutrient release have become the development direction of agricultural fertilizers now and in the future. The polymer-coated fertilizer is called a real controlled-release fertilizer by relevant experts. It uses polymer materials to form a thin film on the surface of the fertilizer, contro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G5/00C05G1/00
Inventor 胡树文陶树明任雪芹张福锁江荣风
Owner 吉林省沃野生态环境治理有限公司
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