Coating sustained-release material, preparation method thereof and coated slow-release fertilizer prepared by using coating sustained-release material
A coating slow-release and fertilizer technology, which is applied in the direction of layered/coated fertilizers, phosphate fertilizers, fertilization devices, etc., can solve the problems of large environmental impact and high temperature requirements, and achieve process energy saving, good slow-release performance, and extended The effect of the industrial chain
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[0034] Example 1
[0035] The preparation of a coated sustained-release material, the specific steps are as follows:
[0036] 1) Fully stir 40g polyethylene glycol solution with a mass concentration of 2.5% and 3g vinyl acetate-ethylene copolymer emulsion (Guangxi Guangwei GW-705) to completely dissolve the vinyl acetate-ethylene copolymer emulsion;
[0037] 2) Add 0.2g of sodium carboxymethyl cellulose to the solution obtained in step 1) and fully stir to dissolve it completely;
[0038] 3) Add 0.8 g of glycerol to the solution obtained in step 2), and stir and mix for 15 minutes at a stirring speed of 950 rpm;
[0039] 4) Add 5 g of silicon dioxide and 0.1 g of aluminum phosphate to the solution obtained in step 3), and stir for 35 minutes at a stirring speed of 950 rpm to prepare a coating liquid, that is, a coating sustained-release material.
[0040] The coated sustained-release material prepared in this example is used to prepare a coated sustained-release fertilizer, and the speci...
Example Embodiment
[0045] Example 2
[0046] The preparation of a coated sustained-release material, the specific steps are as follows:
[0047] 1) Mix 40g of polyethylene glycol solution with a mass concentration of 5% and 2g of vinyl acetate-ethylene copolymer emulsion (Guangxi Guangwei GW-705) to fully dissolve the vinyl acetate-ethylene copolymer emulsion.
[0048] 2) Add 0.4 g of carboxymethyl cellulose sodium salt to the solution obtained in step 1) and fully stir to completely dissolve it.
[0049] 3) Add 0.5g glycerol and 0.1g ethylene glycol to the solution obtained in step 2) and stir and mix for 15min at a stirring speed of 894rpm.
[0050] 4) Add 3 g of silicon dioxide and 0.2 g of aluminum phosphate to the solution obtained in step 3) and stir for 35 minutes at a stirring speed of 894 rpm to prepare a coating liquid.
[0051] The coated sustained-release material prepared in this example is used to prepare a coated sustained-release fertilizer, and the specific steps are as follows:
[0052] Se...
Example Embodiment
[0053] Example 3
[0054] The preparation of a coated sustained-release material, the specific steps are as follows:
[0055] 1) Mix 40g of polyethylene glycol solution with a mass concentration of 7.5% and 1g of vinyl acetate-ethylene copolymer emulsion (Guangxi Guangwei GW-705) to fully dissolve the vinyl acetate-ethylene copolymer emulsion.
[0056] 2) Add 0.6 g of carboxymethyl cellulose sodium salt to the solution obtained in step 1) and fully stir to completely dissolve it.
[0057] 3) Add 0.4 g of glycerol to the solution obtained in step 2) and stir and mix for 15 minutes at a stirring speed of 1012 rpm.
[0058] 4) Add 4 g of silica and 0.3 g of aluminum phosphate to the solution obtained in step 3) and stir at a stirring speed of 1012 rpm for 35 minutes to prepare a coating liquid.
[0059] The coated sustained-release material prepared in this example is used to prepare a coated sustained-release fertilizer, and the specific steps are as follows:
[0060] Select 5g of granular ...
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