Method for preparing pre-vulcanized natural latex based slow release fertilizer

A technology of natural rubber latex, slow-release fertilizer, applied in the direction of fertilizer mixture, fertilization device, application

Inactive Publication Date: 2009-09-16
GUANGDONG OCEAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the above preparation methods all have their limitations

Method used

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  • Method for preparing pre-vulcanized natural latex based slow release fertilizer
  • Method for preparing pre-vulcanized natural latex based slow release fertilizer
  • Method for preparing pre-vulcanized natural latex based slow release fertilizer

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preparation example Construction

[0012] 1 Preparation of prevulcanized latex:

[0013] ① Vulcanization formula: 166.67 parts of natural rubber latex with a mass percentage concentration of 60%, 14.46 parts of casein with a mass percentage concentration of 10%, 3.86 parts of KOH with a mass percentage concentration of 25%, 8-12.05 parts of sulfur, and 8-8 parts of accelerator PX 12.05 parts, anti-aging agent 264 6.03 parts, zinc oxide 4.82 parts, soft water 143.24 parts, wherein, sulfur, accelerator PX, anti-aging agent 264 and zinc oxide all adopt colloid mill or sand mill to carry out grinding 24-48 hours before use, make Component dispersion, its mass percent concentration is respectively 40%, 40%, 40% and 50%.

[0014] ②Adding order: natural latex---→soft water---→casein---→KOH---→sulfur---→accelerator PX---→antiaging agent 264---→zinc oxide.

[0015] ③ Pre-vulcanization: heat the latex, raise the temperature to 55°C within 50 minutes, and stir slowly under the condition of 55±3°C, and control the natural...

Embodiment 1

[0022] Get 100kg urea, join in the chitosan acetic acid solution, stir until completely dissolving, control the mass percent concentration of urea between 8%-10%, the mass percent concentration of chitosan is 1.00%, obtain solution A. Then add glutaraldehyde solution and urea in the sodium alginate solution, and supplement a certain amount of water, stir until dissolving evenly, control the mass percentage concentration of urea between 8%-10%, the mass percentage concentration of glutaraldehyde is at 3 Between -5%, the mass percentage concentration of sodium alginate is 3%, and solution B is obtained. Use a water pump to pump a small amount of solution A onto a disc with many small holes at the bottom, let solution A drop into solution B through the small holes (hole diameter 4 to 6 mm), and after solution A drops into solution B, Immediately solidify into a ball. Continue dripping the solution for about 5-10 minutes, stop dripping solution A, let it stand still for about 20 ...

Embodiment 2

[0025] Get 100kg potassium chloride, join in chitosan acetic acid solution, stir until completely dissolving, control the mass percentage concentration of potassium chloride between 5%-10%, chitosan mass percentage concentration is 1.0%, obtain solution A . Then add glutaraldehyde solution and potassium chloride in the sodium alginate solution, and supplement a certain amount of water, stir until dissolving evenly, control the mass percentage concentration of potassium chloride between 5%-10%, the mass percentage of glutaraldehyde The percentage concentration is between 3-5%, the mass percentage concentration of sodium alginate is 3%, and the solution B is obtained. Use a water pump to pump a small amount of solution A onto a disc with many small holes at the bottom, let solution A drop into solution B through the small holes (hole diameter 4 to 6 mm), and after solution A drops into solution B, Immediately solidify into a ball. Continue dripping the solution for about 5-10 ...

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Abstract

The invention relates to a method for preparing pre-vulcanized natural latex based slow release fertilizer. Natural amylose chitosan and sodium alginate as wrapping materials are used for wrapping and molding fertilizer. By adopting pre-vulcanized natural latex as a wrapping material and controlling the cross-linking density of the pre-vulcanized natural latex, various slow release fertilizers with different slow release speeds can be obtained within a definite range. The raw materials adopted by the method are all natural high molecular materials, the operation process does not use organic solvent, and water source and soil pollution is not generated during use, so the method accords with the requirement of safety and environmental protection, and is particularly applicable to the production in saline districts by directly using local brine.

Description

technical field [0001] The invention belongs to a preparation method of prevulcanized natural latex-based slow-release fertilizer. Background technique [0002] With the strengthening of people's awareness of environmental and resource protection, the research and development of slow and controlled release fertilizers has become the mainstream direction of fertilizer agriculture. At present, the preparation methods of slow-release fertilizers mainly include thermoplastic resin encapsulation, thermosetting resin encapsulation and hydrophilic polymer encapsulation. Among them, the thermoplastic resin encapsulation method needs to use a large amount of organic solvent, which increases the production cost and the pressure on the environment. The thermosetting resin wrapping method needs to be carried out at high temperature, which consumes a lot of energy, and the thermosetting resin of the wrapping layer is generally a polar matrix, which has strong penetration to water and fe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
Inventor 钟杰平侯婷婷李程鹏黄银燕杨磊李思东
Owner GUANGDONG OCEAN UNIVERSITY
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