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
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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.
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Property | Measurement | Unit |
Particle size | 3.0 ~ 4.0 | mm |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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