Controlled release fertilizer coated by vegetable oil based polyurethane and preparation method thereof

A vegetable oil-based, controlled-release fertilizer technology, applied in fertilizer mixtures, fertilization devices, applications, etc., can solve the problems of low continuous level, non-degradable membrane materials, and high production costs, and achieve simple film forming process, excellent mechanical properties, The effect of high adhesion

Inactive Publication Date: 2013-09-18
上海永通生态工程股份有限公司
View PDF2 Cites 70 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In my country, the coating-type controlled-release fertilizer prepared by dissolving polymer materials, such as polyolefin materials, etc. in an organic solvent, and then spraying coated fertilizer particles is relatively matu

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] Step 1), weigh 1kg of 15-15-15 compound fertilizer particles with a particle size of 3mm-4mm, place them in the coating machine, turn on the coating machine to preheat the fertilizer particles until the temperature of the fertilizer particles reaches 70 ℃ and keep.

[0031] Step 2) Weigh 18.9g castor oil, add 1.7g glycerin, 1.08g microcrystalline paraffin; weigh 16.3g polymethylene polyphenyl polyisocyanate, add 2g diethylene glycol dibenzoate; heat separately . After the microcrystalline paraffin is completely melted, the two are mixed and stirred uniformly to form a vegetable oil-based polyurethane coating liquid.

[0032] Step 3) Pour the well-stirred and evenly mixed vegetable oil-based polyurethane coating solution prepared in step 2) slowly onto the surface of the preheated fertilizer particles in step 1), and continue to heat and keep warm for in-situ polymerization, about 5-6 minutes After that, the heating function is turned off, and the fertiliz...

Example Embodiment

[0035] Example 2

[0036] Step 1) Weigh 1kg of 15-15-15 compound fertilizer particles with a particle size of 3mm-4mm, place them in the coating machine, turn on the coating machine to preheat the fertilizer until the temperature of the fertilizer particles reaches 75°C And kept.

[0037] Step 2) Weigh 19.75g soybean oil, add 1.78g glycerin, 1.13g microcrystalline wax; weigh 15.34g polymethylene polyphenyl polyisocyanate, add 2g diethylene glycol dibenzoate; heat separately . After the microcrystalline paraffin is completely melted, the two are mixed and stirred uniformly to form a vegetable oil-based polyurethane coating liquid.

[0038] Step 3) Pour the well-stirred and evenly mixed vegetable oil-based polyurethane coating solution prepared in step 2) slowly onto the surface of the preheated fertilizer particles in step 1), and continue to heat and keep warm for in-situ polymerization, about 5-6 minutes After that, the heating function is turned off, and the fertilizer particles...

Example Embodiment

[0041] Example 3

[0042] Step 1), weigh 1kg of 15-15-15 compound fertilizer particles with a particle size of 3mm-4mm, put them in the coating machine, turn on the coating machine to preheat the fertilizer until the temperature of the fertilizer particles reaches 80°C And kept.

[0043] Step 2), weigh 23.5 g of peanut oil, add 0.52 g of glycerin, 1.3 g of microcrystalline wax; weigh 12.67 g of polymethylene polyphenyl polyisocyanate, add 2 g of diethylene glycol dibenzoate, and heat separately. After the microcrystalline paraffin is completely melted, the two are mixed and stirred uniformly to form a vegetable oil-based polyurethane coating liquid.

[0044] Step 3) Pour the well-stirred and evenly mixed vegetable oil-based polyurethane coating solution prepared in step 2) slowly onto the surface of the preheated fertilizer particles in step 1), and continue to heat and keep warm for in-situ polymerization, about 5-6 minutes After that, the heating function is turned off, and the f...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses a controlled release fertilizer coated by vegetable oil based polyurethane and a preparation method thereof. The preparation method of the controlled release fertilizer coated by vegetable oil based polyurethane comprises the following steps of: 1) preheating the granular fertilizer; 2) heating plant oil polyhydric alcohol containing 2-6 hydroxys and isocyanate containing at least two isocyanate groups, and uniformly mixing the ingredients to form a vegetable oil based polyurethane coating liquid; 3) spray coating the vegetable oil based polyurethane coating liquid on the surfaces of the preheated fertilizer granules, repeatedly spray coating the vegetable oil based polyurethane coating liquid for 2-10 times after the vegetable oil based polyurethane coating liquid solid is solidified to obtain the controlled release fertilizer coated by vegetable oil based polyurethane. According to the controlled release fertilizer coated by vegetable oil based polyurethane and the preparation method thereof provided by the invention, the adopted coating material is extensive in resource, cheap and liable to obtain, non-toxic, harmless, simple in production process and good in controlled release effect of fertilizer.

Description

technical field [0001] The invention relates to a coating material, a coating controlled-release fertilizer and a preparation method thereof, in particular to a vegetable oil-based polyurethane coating, a controlled-release fertilizer and a preparation method thereof. Background technique [0002] Fertilizers, especially chemical fertilizers, are a source of nutrients necessary for crop growth. my country's chemical fertilizer consumption accounts for about 20%-30% of the world's total chemical fertilizer consumption, ranking first in the world, but the average utilization rate of chemical fertilizers in the current season is only 30%-35%. The waste and loss of a large amount of fertilizer not only brings huge economic losses to the society, but also brings serious environmental pollution. At present, with the continuous increase in the amount of chemical fertilizers, the continuous strengthening of people's awareness of environmental protection, and the pursuit of multiple...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08G18/76C08G18/36C08L75/04C05G3/00
Inventor 石称华钱志红季本洋
Owner 上海永通生态工程股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap