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Multifunctional fertilizer and pesticide slow/controlled releasing agent and its prepn process

A controlled-release agent and pesticide technology, applied in the field of functional polymer materials, can solve the problems of complex preparation process, inconvenient use of the final product, high production cost, etc., and achieve the effect of easy-to-obtain raw materials, low production cost and high adsorption force

Inactive Publication Date: 2007-12-26
SHIJIAZHUANG JIANYUAN STARCH DERIVATIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This water-retaining nutrient slow-release agent needs to use an adhesive to bond the water-retaining material and the functional substance together, and also needs to wrap the water-retaining material and the functional fertilizer through the bonding process after the fertilizer is made, so there is The disadvantages of complex preparation process, high production cost, and inconvenient use of the final product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Put 200ml of acrylic acid into the reaction kettle, measure 250ml of 26% sodium hydroxide solution, add it into the reaction kettle to neutralize with acrylic acid.

[0039] The temperature of the neutralizing solution was cooled to 60°C, and 180 g of acrylamide was added and mixed. When the temperature was lowered to 35° C. under stirring, 50 g of corn flour (with a fineness of 40 mesh) and 30 g of bentonite (with a fineness of 325 mesh) were added. Stir for 20 minutes, and after the dispersion is uniform, add 2 g of potassium persulfate, 2.5 g of polyethylene glycol (400), and 10 g of light magnesium carbonate in sequence. Keep the temperature of the reaction solution at 38°C, react under stirring for 40 minutes, then add 80ml of 20% ammonia water, and quickly put the reaction solution into an open reaction container. After 5-8 minutes, the reaction solution will react rapidly, and the reaction will take 7 minutes. It can be completed in about time.

[0040] After t...

Embodiment 2

[0042] Put 300ml of acrylic acid into the reaction kettle, measure 350ml of 26% sodium hydroxide solution, add it into the reaction kettle to neutralize with acrylic acid.

[0043] Cool the temperature of the neutralizing solution to 60°C, and then add 260 g of acrylamide and mix. When the temperature was lowered to 35° C. under stirring, 100 g of corn flour (60 mesh in fineness) and 60 g of bentonite (300 mesh in fineness) were added. Stir for 20 minutes, and after the dispersion is uniform, add 6 g of potassium persulfate, 5 g of polyethylene glycol (600), and 20 g of light magnesium carbonate in sequence. Keep the temperature of the reaction solution at 38° C., react under stirring for 40 minutes, then add 160 ml of 20% ammonia water, and quickly put the reaction solution into an open reaction container, and the reaction solution reacts rapidly.

[0044] After the reaction is completed, the obtained polymer is naturally cooled, sliced, dried and pulverized. Product drying...

Embodiment 3

[0046] Put 270ml of acrylic acid into the reactor, measure 325ml of 26% sodium hydroxide solution, and add it into the reactor to neutralize the acrylic acid.

[0047] The temperature of the neutralizing liquid was cooled to 60°C, and 234 g of acrylamide was added and mixed. When the temperature was lowered to 35° C. under stirring, 75 g of corn flour (with a fineness of 50 mesh) and 40 g of bentonite (with a fineness of 300 mesh) were added. Stir for 20 minutes, and after the dispersion is uniform, add 2.6 g of ammonium persulfate, 3.5 g of glycerol, and 15 g of light magnesium carbonate in sequence. Keep the temperature of the reaction solution at 38° C., react under stirring for 40 minutes, then add 110 ml of 20% ammonia water, and quickly put the reaction solution into an open reaction container, and the reaction solution undergoes rapid reaction.

[0048] After the reaction is completed, the obtained polymer is cooled, sliced, dried and pulverized. Product drying temper...

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PUM

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Abstract

The present invention discloses one kind of multifunctional fertilizer and pesticide slow / controlled releasing agent and its preparation process. The slow / controlled releasing agent is prepared with the main materials including acrylic acid, alkali solution, acrylamide, corn powder, bentonite and magnesium carbonate in certain weight proportion and through grafting copolymerization. The preparation process includes the steps of: neutralizing acrylic acid with alkali solution to obtain neutralized solution; the grafting copolymerization reaction of the neutralized solution, acrylamide, corn powder, bentonite and magnesium carbonate to obtain polymer; and cooling, slicing, stoving and crushing the polymer. The slow / controlled releasing agent has environment friendship, convenient use, and ellent fertilizer and pesticide slow / controlled releasing effect.

Description

technical field [0001] The invention relates to the field of functional polymer materials, in particular to a slow / controlled release agent for fertilizers and pesticides and a preparation method thereof. Background technique [0002] Comprehensive slow / controlled release materials at home and abroad mainly include sulfur, paraffin, asphalt, resin, added fungal inhibitors and other insoluble substances in water. The use of sulfur to coat the fertilizer has a complicated production process and high cost. And long-term application of this fertilizer can cause soil acidification and damage the soil structure. Paraffin and asphalt are insoluble in water, and the wrapped fertilizer is not easy to release. The production cost of using fungal inhibitors is high. Resin coating is used, because the resin is not degradable, it will cause secondary pollution to the soil. The slow-release fertilizer made by wrapping ammonium bicarbonate with calcium magnesium phosphate fertilizer, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05F11/00C05F17/00
CPCY02W30/40
Inventor 李春山于凤芹仵志玲仵志松于欣仵屹
Owner SHIJIAZHUANG JIANYUAN STARCH DERIVATIVE
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