Degradable light-cured coating material and application of same in coated sustained/controlled-release fertilizer

A technology for coating materials and controlled-release fertilizers, which is applied in the field of degradable light-cured coating materials and its application in coated slow/controlled-release fertilizers. Reduce the problem of reducing and other problems, and achieve the effects of short curing time of the coating, reducing dependence, and no need for heat energy consumption

Inactive Publication Date: 2013-10-09
HUBEI FORBON TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The coated controlled-release fertilizer produced by this coating material has no organic solvents and by-products, is safe and non-toxic, and has reduced costs, but it is still difficult to be accepted by field agriculture.
In addit...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Preparation of coating material

[0039] Add 100.0g of epoxidized soybean oil (6.2% epoxy value) and 16.7g of acrylic acid into a reaction kettle equipped with a magnetic stirrer, a thermometer, and a reflux condenser, and add 1.2g of triethylamine and the total amount of reactants 0.1 g of β-phenylnaphthylamine was heated up to 110° C., reacted for 8 hours, cooled and discharged. The acrylic acid graft modified epoxy soybean oil prepolymer with a graft rate of 92% was obtained.

[0040] Get the above-mentioned acrylic acid graft modified epoxy soybean oil prepolymer 30.0g and styrene 27.0g and stir at room temperature in a light-tight mixer, then add photoinitiator benzoin dimethyl ether 3.0g and continue to stir to obtain a viscosity of 35mPa·s (25°C) photocurable coating material.

[0041] (2) Preparation of coated slow / controlled release fertilizer

[0042] Use discs for light-curing coating: put 1 kg of large-grain urea in the disc, and start the operation; ...

Embodiment 2

[0044] (1) Preparation of coating material

[0045] Add 90.0g of epoxy soybean oil (epoxy value 6.2%), epoxy resin E44 (epoxy value 0.41~0.47mol / 100g) 10.0g, acrylic acid 15.9g into the reaction kettle with magnetic stirring, thermometer and reflux condenser 2.3 g of triphenylphosphine and 0.2 g of hydroquinone in the total amount of reactants were added, the temperature was raised to 120° C., the reaction was carried out for 6 hours, and the material was cooled and discharged. A prepolymer of acrylic acid grafted modified epoxy soybean oil and epoxy resin with a grafting rate of 91% was obtained.

[0046] Get the prepolymer 30.9g and methyl methacrylate 12.4g of the above-mentioned acrylic acid graft modified epoxy soybean oil and epoxy resin, stir evenly at room temperature in a light-tight mixer, then add photoinitiator 2-hydroxyl-2 - 1.7 g of methylpropiophenone was stirred evenly to obtain a photocurable coating material with a viscosity of 85 mPa·s (25°C).

[0047] (2)...

Embodiment 3

[0050] (1) Preparation of coating material

[0051] Put epoxy rapeseed oil (epoxy value 5.1%) 96.0g, epoxy resin E54 (epoxy value 0.54mol / 100g) 4.0g, α-methacrylic acid 13.6g into 0.6 g of triphenylantimony and 0.1 g of o-methylhydroquinone in the total amount of reactants were added to the reaction kettle, and the temperature was raised to 130° C., reacted for 6 hours, and cooled to discharge. A prepolymer of α-methacrylic acid grafted modified epoxy cottonseed oil and epoxy resin with a grafting rate of 92% was obtained.

[0052] Take the prepolymer 36.0g of the above-mentioned α-methacrylic acid grafted modified epoxy cottonseed oil and epoxy resin and 3.0g of methyl acrylate and stir evenly at room temperature in a light-tight mixer, then add the photoinitiator 1-hydroxyl Continue to stir 1.0 g of cyclohexyl phenyl ketone evenly to obtain a photocurable coating material with a viscosity of 320 mPa·s (25° C.).

[0053] (2) Preparation of coated slow / controlled release fer...

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Abstract

The invention discloses a degradable light-cured coating material and application of the same in a coated sustained/controlled-release fertilizer. The coating material comprises, by weight, 50 to 90% of a modified vegetable oil prepolymer, 5 to 45% of an active diluent and 1 to 5% of a photoinitiator. A preparation method for the coated sustained/controlled-release fertilizer from the degradable light-cured coating material comprises the following steps: uniformly spraying the degradable light-cured coating material on the surface of a granulated fertilizer; and carrying out ultraviolet light radiation curing so as to obtain the coated sustained/controlled-release fertilizer. The degradable light-cured coating material provided by the invention uses wide-source, low-price and regenerable vegetable oil and degradable acrylate as main raw materials and employs no organic solvent, so cost for the raw materials is low, dependence on petroleum resources is mitigated, and the coating material has the advantages of environmental degradation capability, no pollution to soil and water sources and environment friendliness. The sustained/controlled-release fertilizer prepared in the invention has the advantages of small usage amount of the coating material, short curing time of a coating, almost no need for heat energy, preparation through a disc and a common rotary drum, no need for extra investment, simple process, convenient operation and capacity of realizing continuous production.

Description

technical field [0001] The invention relates to the technical field of materials and fertilizers, in particular to a degradable light-cured coating material and its application in coated slow / controlled release fertilizers. Background technique [0002] Fertilizer is one of the most important means of production in agricultural production and an indispensable material basis for crop growth. It plays a pivotal role in increasing crop yields and provides a solid material foundation for the development of the country and society. In recent years, with the sudden increase of population, the sharp decrease of arable land and the increasingly prominent contradiction between food supply and demand, agricultural production has become overly dependent on chemical fertilizers, resulting in excessive use of chemical fertilizers. my country is a large agricultural country, and the proportion of chemical fertilizers in agricultural production investment is as high as 50%. The amount of c...

Claims

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Application Information

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IPC IPC(8): C09D4/00C09D4/02C05G3/00
Inventor 徐祖顺王仁宗颜萍陈文求刘裕
Owner HUBEI FORBON TECH
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