CN104609983A - Polymer coat and coated controlled-release fertilizer using polymer coat - Google Patents
Polymer coat and coated controlled-release fertilizer using polymer coat Download PDFInfo
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- CN104609983A CN104609983A CN201510062212.7A CN201510062212A CN104609983A CN 104609983 A CN104609983 A CN 104609983A CN 201510062212 A CN201510062212 A CN 201510062212A CN 104609983 A CN104609983 A CN 104609983A
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- polyvalent alcohol
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- polymer capsule
- capsule material
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/30—Layered or coated, e.g. dust-preventing coatings
- C05G5/37—Layered or coated, e.g. dust-preventing coatings layered or coated with a polymer
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/90—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting the nitrification of ammonium compounds or urea in the soil
Abstract
The invention discloses a polymer coat and a preparation method of a coated controlled-release fertilizer using the polymer coat. The polymer coat is obtained by mixing a component a and a component b for in-situ reaction, wherein the component a comprises polymethylene polyphenyl polyisocyanate, the component b comprises alkaline polyether polyol with the relative molecular mass of 200 to 1,500 and 3 to 8 hydroxy groups, and the pH value of the component b is between 7.1 and 13.0. The polymer coat provided by the invention takes advantage of high reaction activity between the alkaline polyether polyol and the polyisocyanate compound, so the use ratio of raw materials is improved, curing reaction is quickened, and thus the controlled-released performance of the coated controlled-release fertilizers is improved.
Description
Technical field
The invention belongs to release and release control fertilizer field, relate to a kind of polymer capsule and coating controlled-release fertilizer thereof.
Background technology
Coating controlled-release fertilizer refers to and according to the nutritional needs feature of plant Different growth phases, can regulate rate of release and the supply intensity of nutrient, makes its nutrients release pattern and crop inhale fertile synchronous new-type fertilizer.It not only can improve the utilization ratio of fertilizer, and can reduce chemical fertilizer pollution on the environment.
At present, according to the difference of preparation technology, coating controlled-release fertilizer is mainly divided into organic solvent type, water type and reaction in－situ film-forming type three kinds.Reaction in－situ film-forming process is simple and operation easily realizes serialization, has become the study hotspot of coating controlled-release fertilizer in recent years.This technique is that raw material monomer is directly reacted into film preparation coating controlled-release fertilizer at fertilizer surface, and coated fertilizer component is urethane.Due to the speed of reaction that occurs between raw material monomer and degree wayward, the degree of mixing on fertiliser granulates is lower, and the utilization ratio of coating raw material is low; Because raw material monomer is after being spread evenly across granulated fertilizer, there is solidification process, solidification process can cause rete to occur tearing, the defect of the macroscopic view such as pin hole, thus have impact on the controlled release properties of rete.Therefore, want to prepare the membranous type polyurethane coated controlled-release fertilizer that is reacted into simultaneously possessing good controlled capability and low coating rate and still there is certain difficulty.
Summary of the invention
The object of this invention is to provide a kind of polymer capsule and coating controlled-release fertilizer thereof.
Polymer capsule material provided by the invention, is carried out reaction in－situ by component a and components b mixing and is obtained;
Described component a is poly methylene poly phenyl poly isocyanate (PAPI) or is made up of poly methylene poly phenyl poly isocyanate (PAPI) and tolylene diisocyanate (TDI);
Described components b is polyvalent alcohol I or is made up of described polyvalent alcohol I and polyvalent alcohol II;
Wherein, described polyvalent alcohol I is the polyether glycol of satisfied following condition: pH value is 7.1 ~ 13.0, and relative molecular mass is 200 ~ 1500 and the number of hydroxyl is 3 ~ 8;
Described polyvalent alcohol II is at least one in the polyether glycol of satisfied following condition, vegetable oil polyol, polyester polyol and polyolefin polyhydric alcohol: pH value is 5.0 ~ 7.0, and relative molecular mass is 200 ~ 3000 and the number of hydroxyl is 2 ~ 3.
In the component a of above-mentioned polymer capsule material, tolylene diisocyanate (TDI) specifically can be selected from least one in TDI-80 and TDI-65;
The pH value of described polyvalent alcohol I specifically can be 9.0 ~ 12.5, more specifically can be 10.5 ~ 12.5,10.0 ~ 12.0,9.0 ~ 11.0 or 9.0 ~ 12.0, more specifically can be 7,7.5,9.0,10.0,10.5,11.0,12.0 or 12.5;
Relative molecular mass specifically can be 250 ~ 1000, more specifically can be 290,350,470 or 670;
The number of hydroxyl specifically can be 3 ~ 6, more specifically can be 3,4 or 6.
More specifically, it is 470 that described polyvalent alcohol I can be relative molecular mass, pH value is 10.0 ~ 12.0, the number of hydroxyl is the alkaline polyether polyols of 4 or relative molecular mass is 350, pH value is 9.0 ~ 12.0, the number of hydroxyl is the alkaline polyether polyols of 4 or relative molecular mass is 670, pH value is 9.0 ~ 11.0, the number of hydroxyl is the alkaline polyether polyols of 6 or relative molecular mass is 290, pH value is 10.5 ~ 12.5, the number of hydroxyl is the alkaline polyether polyols of 4 or relative molecular mass is 670, pH value is 7.1 ~ 7.5, the number of hydroxyl is the alkaline polyether polyols of 3,
The pH value of described polyvalent alcohol II specifically can be 6 ~ 7; Relative molecular mass specifically can be 400 ~ 1000, more specifically can be 400,420,700,932 or 1000; The number of hydroxyl specifically can be 2,2.7 or 3;
The polyether glycol that in described polyvalent alcohol II, described polyether glycol specifically can be that relative molecular mass is 700, pH value is 6 ~ 7, hydroxyl number is the polyether glycol of 3 or relative molecular mass is 400, pH value is 6 ~ 7, hydroxyl number is 2;
Described polyester polyol specifically can be that relative molecular mass is 420, pH value is 6 ~ 7, hydroxyl number is the polyester polyol of 2 or relative molecular mass is 1000, pH value is 6 ~ 7, hydroxyl number is 2 polyester polyol;
Described vegetable oil polyol specifically can be the Viscotrol C that relative molecular mass is 932, pH value is 6 ~ 7, hydroxyl number is 2.7.
In described component a, poly methylene poly phenyl poly isocyanate (PAPI) accounts for 50 ~ 100% of described component a total mass, specifically can be 50%, 54%, 75% or 83%.
In described components b, described polyvalent alcohol I accounts for 70 ~ 100% of described components b total mass.
In described reaction in－situ step, the mol ratio of the isocyano group in component a and the oh group in components b is 1.0 ~ 2.3:1, specifically can be 1.1 ~ 2.0:1, more specifically can be 1.2 ~ 1.5:1, more specifically can be 1.0:1,1.1:1,1.15:1,1.2:1,2.0:1 or 2.3:1.
In described reaction in－situ step, temperature is 75 DEG C ~ 105 DEG C, is specially 90 ~ 95 DEG C;
Reaction times is 8min ~ 20min, is specially 10min ~ 15min, more specifically can be 10min, 12min or 15min.
The reaction raw materials of described reaction in－situ is also containing at least one in catalyzer and furtherance film;
Described catalyzer is selected from least one in dibutyl tin laurate, two mercaptan dialkyl tins, dibutyltin diacetate, stannous octoate, Mono-n-butyltin, Dibutyltin oxide, dimethylcyclohexylamine, dimethyl cetylamine, triethylenediamine, dimethylethanolamine, trolamine, tetramethyl-imino-dipropylamine, bismuth carboxylate, isocaprylic acid potassium, isocaprylic acid zinc, Potassium ethanoate and potassium oleate;
Described furtherance film is selected from least one in paraffin, Microcrystalline Wax, clorafin, petroleum resin, alpha-olefin, polyethylene wax, EVA wax, pitch and silicon wax; Described paraffin is specially the paraffin that fusing point is 60 DEG C;
The consumption of described catalyzer is 0 ~ 0.2% of described polymer capsule material total mass, and is not 0, is specially 0.02 ~ 0.15%;
The consumption of described furtherance film is 0.5 ~ 8% of described polymer capsule material total mass, is specially 2 ~ 5%.
Present invention also offers a kind of coating controlled-release fertilizer.This coating controlled-release fertilizer is made up of coating layer and fertiliser granulates; The surface of described fertiliser granulates is surrounded by described coating layer;
Wherein, the material forming described coating layer is aforementioned polymer capsule material provided by the invention;
The mass ratio of described coating layer and fertiliser granulates is 3.0:100 ~ 7.0:100, is specially 3.67:100,3.68:100,3.76:100,4.84:100,5.31:100 or 6.25:100.
Described fertiliser granulates is water-soluble straight fertilizer or by least two kinds of Chemical Mixed Fertilizers be mixed to get in described water-soluble straight fertilizer;
Wherein, described water-soluble straight fertilizer is selected from urea, ammonium sulfate, ammonium chloride, ammonium nitrate, monoammonium phosphate, diammonium phosphate, Repone K, potassium sulfate, saltpetre, magnesium sulfate, magnesium nitrate, zinc sulfate, copper sulfate or zinc chloride; the mass ratio that specifically can be urea granules that particle diameter is 2mm-4mm or n-p-k element is the Sa Kefu composite fertilizer of 15:15:15; wherein; in this Sa Kefu composite fertilizer; the quality of nitrogen element is in nitrogen; the quality of phosphoric is with Vanadium Pentoxide in FLAKES, and the quality of potassium element is in potassium oxide.
The particle diameter of described fertiliser granulates is 2mm-5mm, specifically can be 2mm-4mm.
The method of the described coating controlled-release fertilizer of preparation provided by the invention, after comprising the steps: that aforementioned any component a provided by the invention and components b are heated to molten state respectively according to proportioning, atomizing spraying carries out described reaction in－situ on the surface of described fertiliser granulates, dry after completion of the reaction, obtain described coating controlled-release fertilizer.
The present invention adopts the high reaction activity advantage had between alkaline polyether polyols and polyisocyanate compound, accelerate speed of reaction, both improve the utilization ratio of raw material, and accelerated again the carrying out of in-situ solidifying reaction, thus improve the controlled release characteristics of coating controlled-release fertilizer.
Embodiment
Below in conjunction with specific embodiment, the present invention is further elaborated, but the present invention is not limited to following examples.Described method is ordinary method if no special instructions.Described starting material all can obtain from open commercial sources if no special instructions.
The controlled release properties of following embodiment gained coating controlled-release fertilizer adopts water-extraction method test:
Take 5g coating controlled-release fertilizer and be placed in 100 object nylon net bags, after sealing, bag is inserted in the plastic containers filled in 250mL distilled water, after sealing, put into 25 DEG C of constant incubators, respectively at sampling in 1,3,7,15,30,60 and 90 day, adopt spectrophotometry nitrogen stripping data.
Fertilizer releasing period refers to that coating controlled-release fertilizer preparation in 25 DEG C of water reaches the number of days needed for 80%.
Content × 100% of this nutrient in the amount of nutrients/sample of preliminary solubility (the %)=first day accumulation stripping of nitrogen element
Embodiment 1, prepare coating controlled-release fertilizer
1) take 3kg urea granules (2mm-4mm is purchased from Hua Lu Hengsheng, Shandong chemical industry), be placed in fluidized-bed, be preheated to 75 DEG C;
Take 48g alkaline polyether polyols and (be purchased from Plant of Tianjin Petrochemical Company, the trade mark is TAE-470, pH value is 10.0 ~ 12.0, relative molecular mass is 470, the number of hydroxyl is 4) and 2.4g furtherance film fusing point be the paraffin of 60 DEG C, obtain components b, be placed in heating kettle and stir and be heated to 90 DEG C, constant temperature, in molten state.
Take 60gPAPI (trade mark is Bayer 44V20), obtain component a, the mol ratio of the isocyano group in component a and the oh group in components b polyvalent alcohol is 1.1:1, is placed in heating kettle and is heated to 90 DEG C, constant temperature, in molten state;
2) the atomizing spraying while of component a and components b is carried out reaction in－situ after 10 minutes to the granulated fertilizer surface of preheating, first thermal source is taken out, more slowly cool, obtain coating controlled-release fertilizer provided by the invention.The mass ratio of coating layer and fertiliser granulates is 3.68:100.
Adopt water-extraction method to measure the controlled release properties of this coating controlled-release fertilizer, known, the preliminary solubility of nitrogen element is 1.5%, and the controlled release phase of this coating controlled-release fertilizer is 50 days.
Embodiment 2,
1) take 3kg urea granules (2mm-4mm is purchased from Hua Lu Hengsheng, Shandong chemical industry), be placed in fluidized-bed, be preheated to 75 DEG C;
Taking 45g polyvalent alcohol I is also that alkaline polyether polyols (is purchased from the Zhong Mountain, Jiangsu chemical industry, the trade mark is N635S, relative molecular mass is 670, pH value is 9.0 ~ 11.0, the number of hydroxyl is 6), 11g polyvalent alcohol II also namely polyether glycol (be purchased from the Zhong Mountain, Jiangsu chemical industry, the trade mark is N204, relative molecular mass is 400, pH value is 6 ~ 7, the number of hydroxyl is 2), the sub-tin of 0.18g octoate catalyst and 0.65g furtherance film Microcrystalline Wax, obtain components b, be placed in heating kettle and stir and be heated to 95 DEG C, constant temperature, in molten state.
Take 42g PAPI (trade mark is the magnificent PM-200 in Yantai ten thousand) and 14g TDI-80 (being purchased from Mitsui Wu Tian KCC), obtain component a, the mol ratio of the isocyano group in component a and the oh group in components b polyvalent alcohol is 1.15:1, be placed in heating kettle and be heated to 95 DEG C, constant temperature, in molten state;
2) the atomizing spraying while of component a and components b is carried out reaction in－situ after 5 minutes to the granulated fertilizer surface of preheating, first thermal source is taken out, more slowly cool, obtain coating controlled-release fertilizer provided by the invention.The mass ratio of coating layer and fertiliser granulates is 3.76:100.
Adopt water-extraction method to measure the controlled release properties of this coating controlled-release fertilizer, known, the preliminary solubility of nitrogen element is 2.3%, and the controlled release phase of this coating controlled-release fertilizer is 45 days.
Embodiment 3,
1) take 3kg urea granules (2mm-4mm is purchased from Hua Lu Hengsheng, Shandong chemical industry), be placed in fluidized-bed, be preheated to 75 DEG C;
Take the alkaline polyether polyols that 30g belongs to polyvalent alcohol I and (be purchased from the Zhong Mountain, Jiangsu chemical industry, the trade mark is N635S, relative molecular mass is 670, pH value is 9.0 ~ 11.0, the number of hydroxyl is 6), the alkaline polyether polyols that 19g belongs to polyvalent alcohol I (is purchased from Mitsui Chemicals, the trade mark is G-250, relative molecular mass is 670, pH value is 7 ~ 7.5, the number of hydroxyl is 3), 4g belongs to the Viscotrol C of polyvalent alcohol II, and (relative molecular mass is 932, pH value is 6 ~ 7, hydroxyl number is 2.7), 0.1g catalyzer isocaprylic acid potassium and 1.5g furtherance film Microcrystalline Wax, obtain components b, be placed in heating kettle to stir and be heated to 90 DEG C, constant temperature, in molten state.
Take 46g PAPI (trade mark is the magnificent PM-200 in Yantai ten thousand) and 9.6g TDI-65 (being purchased from Lyondell chemical company), obtain component a, the mol ratio of the isocyano group in component a and the oh group in components b polyvalent alcohol is 1.2:1, be placed in heating kettle and be heated to 90 DEG C, constant temperature, in molten state;
2) the atomizing spraying while of component a and components b is carried out reaction in－situ after 12 minutes to the granulated fertilizer surface of preheating, first thermal source is taken out, more slowly cool, obtain coating controlled-release fertilizer provided by the invention.The mass ratio of coating layer and fertiliser granulates is 3.67:100.
Adopt water-extraction method to measure the controlled release properties of this coating controlled-release fertilizer, known, the preliminary solubility of nitrogen element is 1.3%, and the controlled release phase of this coating controlled-release fertilizer is 54 days.
Embodiment 4,
1) take 3kg Sa Kefu composite fertilizer (N-P-K:15-15-15), be placed in fluidized-bed, be preheated to 85 DEG C;
Take the alkaline polyether polyols that 18g belongs to polyvalent alcohol I and (be purchased from the Zhong Mountain, Jiangsu chemical industry, the trade mark is N-403, relative molecular mass is 290, pH value is 10.5 ~ 12.5, the number of hydroxyl is 4), the alkaline polyether polyols that 30g belongs to polyvalent alcohol I (is purchased from Plant of Tianjin Petrochemical Company, the trade mark is TAE-470, pH value is 10.0 ~ 12.0, relative molecular mass is 470, the number of hydroxyl is 4), 12.8g polyvalent alcohol II is also that polyester polyol (is purchased from auspicious company of Cisco, the trade mark is SKR-T4, relative molecular mass is 420, pH value is 6 ~ 7, the number of hydroxyl is 2), 0.032g catalyst dibutyltin dilaurylate and 8.5g furtherance film polyethylene wax, obtain components b, be placed in heating kettle to stir and be heated to 90 DEG C, constant temperature, in molten state.
Take 76gPAPI (trade mark is BASF M-20S), obtain component a, the mol ratio of the isocyano group in component a and the oh group in components b polyvalent alcohol is 1.0:1, is placed in heating kettle and is heated to 90 DEG C, constant temperature, in molten state;
2) the atomizing spraying while of component a and components b is carried out reaction in－situ after 15 minutes to the granulated fertilizer surface of preheating, first thermal source is taken out, more slowly cool, obtain coating controlled-release fertilizer provided by the invention.The mass ratio of coating layer and fertiliser granulates is 4.84:100.
Adopt water-extraction method to measure the controlled release properties of this coating controlled-release fertilizer, known, the preliminary solubility of nitrogen element is 0.4%, and the controlled release phase of this coating controlled-release fertilizer is 75 days.
Embodiment 5,
1) take 3kg urea granules (2mm-4mm is purchased from Hua Lu Hengsheng, Shandong chemical industry), be placed in rotary drum, be preheated to 85 DEG C;
The alkaline polyether polyols that 38g belongs to polyvalent alcohol I (is purchased from Plant of Tianjin Petrochemical Company, the trade mark is TAE-470, pH value is 10.0 ~ 12.0, relative molecular mass is 470, the number of hydroxyl is 4), the alkaline polyether polyols that 18g belongs to polyvalent alcohol I (is purchased from Plant of Tianjin Petrochemical Company, the trade mark is TAE-360, relative molecular mass is 350, pH value is 9.0 ~ 12.0, the number of hydroxyl is 4), 14g polyvalent alcohol II is also that polycaprolactone glycol (is purchased from Solvay Interox company of Britain, the trade mark is CAPA2100, relative molecular mass is 1000, pH value is 6 ~ 7, the number of hydroxyl is 2), 0.24g catalyzer trolamine and 3g furtherance film petroleum resin, obtain components b, be placed in heating kettle to stir and be heated to 95 DEG C, constant temperature, in molten state.
Take 86gPAPI (trade mark is the magnificent PM-200 in Yantai ten thousand), obtain component a, the mol ratio of the isocyano group in component a and the oh group in components b polyvalent alcohol is 2.0:1, is placed in heating kettle and is heated to 95 DEG C, constant temperature, in molten state;
2) the atomizing spraying while of component a and components b is carried out reaction in－situ after 15 minutes to the granulated fertilizer surface of preheating, first thermal source is taken out, more slowly cool, obtain coating controlled-release fertilizer provided by the invention.The mass ratio of coating layer and fertiliser granulates is 5.31:100.
Adopt water-extraction method to measure the controlled release properties of this coating controlled-release fertilizer, known, the preliminary solubility of nitrogen element is 1.6%, and the controlled release phase of this coating controlled-release fertilizer is 68 days.
Embodiment 6,
1) take 3kg urea granules (2mm-4mm is purchased from Hua Lu Hengsheng, Shandong chemical industry), be placed in fluidized-bed, be preheated to 75 DEG C;
Take the alkaline polyether polyols that 30g belongs to polyvalent alcohol I and (be purchased from Mitsui Chemicals, the trade mark is G-250, relative molecular mass is 670, pH value is 7.1 ~ 7.5, the number of hydroxyl is 3), the alkaline polyether polyols that 30g belongs to polyvalent alcohol I (is purchased from Plant of Tianjin Petrochemical Company, the trade mark is TAE-360, relative molecular mass is 350, pH value is 9.0 ~ 12.0, the number of hydroxyl is 4), 8g polyvalent alcohol II is also that polyether glycol (is purchased from the Zhong Mountain, Jiangsu chemical industry, the trade mark is N307, relative molecular mass is 700, pH value is 6 ~ 7, the number of hydroxyl is 3), 0.35g catalyzer bismuth carboxylate and 14g furtherance film pitch, obtain components b, be placed in heating kettle to stir and be heated to 90 DEG C, constant temperature, in molten state.
Take 59g PAPI (trade mark is the magnificent PM-200 in Yantai ten thousand) and 46g TDI-80, obtain component a, the mol ratio of the isocyano group in component a and the oh group in components b polyvalent alcohol is 2.3:1, is placed in heating kettle and is heated to 90 DEG C, constant temperature, in molten state;
2) the atomizing spraying while of component a and components b is carried out reaction in－situ after 15 minutes to the granulated fertilizer surface of preheating, first thermal source is taken out, more slowly cool, obtain coating controlled-release fertilizer provided by the invention.The mass ratio of coating layer and fertiliser granulates is 6.25:100.
Adopt water-extraction method to measure the controlled release properties of this coating controlled-release fertilizer, known, the preliminary solubility of nitrogen element is 0.8%, and the controlled release phase of this coating controlled-release fertilizer is 70 days.
Claims (10)
1. a polymer capsule material, is carried out reaction in－situ by component a and components b mixing and is obtained;
Described component a is poly methylene poly phenyl poly isocyanate or is made up of poly methylene poly phenyl poly isocyanate and tolylene diisocyanate;
Described components b is polyvalent alcohol I or is made up of described polyvalent alcohol I and polyvalent alcohol II;
Wherein, described polyvalent alcohol I is the polyether glycol of satisfied following condition: pH value is 7.1 ~ 13.0, and relative molecular mass is 200 ~ 1500 and the number of hydroxyl is 3 ~ 8;
Described polyvalent alcohol II is at least one in the polyether glycol of satisfied following condition, vegetable oil polyol, polyester polyol and polyolefin polyhydric alcohol: pH value is 5.0 ~ 7.0, and relative molecular mass is 200 ~ 3000 and the number of hydroxyl is 2 ~ 3.
2. polymer capsule material according to claim 1, is characterized in that: the pH value of described polyvalent alcohol I is 9.0 ~ 12.5, and relative molecular mass is 250 ~ 1000, and the number of hydroxyl is 4 ~ 6.
3. polymer capsule material according to claim 2, is characterized in that: in described component a, poly methylene poly phenyl poly isocyanate accounts for 50 ~ 100% of described component a total mass.
4., according to described polymer capsule material arbitrary in claim 1-3, it is characterized in that: in described components b, described polyvalent alcohol I accounts for 70 ~ 100% of described components b total mass.
5., according to described polymer capsule material arbitrary in claim 1-4, it is characterized in that: in described reaction in－situ step, the mol ratio of the isocyano group in described component a and the oh group in components b is 1.0 ~ 2.3:1.
6., according to described polymer capsule material arbitrary in claim 1-5, it is characterized in that: in described reaction in－situ step, temperature is 75 DEG C ~ 105 DEG C, is specially 90 ~ 95 DEG C;
Reaction times is 8min ~ 20min, is specially 10min ~ 15min.
7. according to described polymer capsule material arbitrary in claim 1-6, it is characterized in that: the reaction raw materials of described reaction in－situ is also containing at least one in catalyzer and furtherance film;
Described catalyzer is selected from least one in dibutyl tin laurate, two mercaptan dialkyl tins, dibutyltin diacetate, stannous octoate, Mono-n-butyltin, Dibutyltin oxide, dimethylcyclohexylamine, dimethyl cetylamine, triethylenediamine, dimethylethanolamine, trolamine, tetramethyl-imino-dipropylamine, bismuth carboxylate, isocaprylic acid potassium, isocaprylic acid zinc, Potassium ethanoate and potassium oleate;
Described furtherance film is selected from least one in paraffin, Microcrystalline Wax, clorafin, petroleum resin, alpha-olefin, polyethylene wax, EVA wax, pitch and silicon wax;
The consumption of described catalyzer is 0 ~ 0.2% of described polymer capsule material total mass, and is not 0, is specially 0.02 ~ 0.15%;
The consumption of described furtherance film is 0.5 ~ 8% of described polymer capsule material total mass, is specially 2 ~ 5%.
8. a coating controlled-release fertilizer, is made up of coating layer and fertiliser granulates; The surface of described fertiliser granulates is surrounded by described coating layer;
Wherein, the material forming described coating layer is arbitrary described polymer capsule material in claim 1-7;
The mass ratio of described coating layer and fertiliser granulates is 3.0:100 ~ 7.0:100.
9. coating controlled-release fertilizer according to claim 8, is characterized in that: described fertiliser granulates is water-soluble straight fertilizer or by least two kinds of Chemical Mixed Fertilizers be mixed to get in described water-soluble straight fertilizer;
The particle diameter of described fertiliser granulates is 2mm-5mm.
10. prepare the method for coating controlled-release fertilizer described in claim 8 or 9 for one kind, after comprising the steps: that described component a arbitrary in claim 1-7 and components b are heated to molten state respectively according to proportioning, described reaction in－situ is carried out on the surface of atomizing spraying fertiliser granulates described in claim 8 or 9, dry after completion of the reaction, obtain described coating controlled-release fertilizer.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105061051A (en) * | 2015-08-10 | 2015-11-18 | 深圳市芭田生态工程股份有限公司 | Nitro fertilizer anti-hardening agent and application method thereof |
| CN107963950A (en) * | 2016-10-19 | 2018-04-27 | 宁夏农林科学院农业资源与环境研究所 | A kind of nitrification inhibitor type coated carbamide and preparation method thereof |
| US10273194B2 (en) | 2016-07-04 | 2019-04-30 | Gary David McKnight | Process to conserve cyano-function and improve performance of low molecular weight nitrification inhibitors to improve fertilizer efficiency |
| CN110540468A (en) * | 2019-09-30 | 2019-12-06 | 北京市农林科学院 | Cage type silsesquioxane modified in-situ reaction film-forming type coated controlled release fertilizer and preparation method thereof |
| CN110698304A (en) * | 2019-11-19 | 2020-01-17 | 南华大学 | Coated controlled release fertilizer and preparation method thereof |
| CN111423281A (en) * | 2019-01-09 | 2020-07-17 | 北京市农林科学院 | Polyurethane coated controlled release fertilizer and preparation method thereof |
| CN116375531A (en) * | 2023-03-30 | 2023-07-04 | 中国农业科学院农业资源与农业区划研究所 | Temperature-sensitive polyurethane coated controlled-release fertilizer and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101648837A (en) * | 2009-09-11 | 2010-02-17 | 中国海洋石油总公司 | Polyurethane filmcoated controlled release fertilizer and preparation method thereof |
| CN101747123A (en) * | 2009-12-19 | 2010-06-23 | 山西学产研化工产业技术中心(有限公司) | Method for preparing polyurethane-polyurea coated fertilizer |
| CN103265684A (en) * | 2013-05-24 | 2013-08-28 | 淄博德信联邦化学工业有限公司 | Polyurethane resin coating material, and preparation process and application thereof |
| CN104030802A (en) * | 2014-05-23 | 2014-09-10 | 北京市农林科学院 | Coated controlled-release fertilizer and preparation method thereof |
-
2015
- 2015-02-05 CN CN201510062212.7A patent/CN104609983B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101648837A (en) * | 2009-09-11 | 2010-02-17 | 中国海洋石油总公司 | Polyurethane filmcoated controlled release fertilizer and preparation method thereof |
| CN101747123A (en) * | 2009-12-19 | 2010-06-23 | 山西学产研化工产业技术中心(有限公司) | Method for preparing polyurethane-polyurea coated fertilizer |
| CN103265684A (en) * | 2013-05-24 | 2013-08-28 | 淄博德信联邦化学工业有限公司 | Polyurethane resin coating material, and preparation process and application thereof |
| CN104030802A (en) * | 2014-05-23 | 2014-09-10 | 北京市农林科学院 | Coated controlled-release fertilizer and preparation method thereof |
Cited By (7)
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| CN105061051A (en) * | 2015-08-10 | 2015-11-18 | 深圳市芭田生态工程股份有限公司 | Nitro fertilizer anti-hardening agent and application method thereof |
| US10273194B2 (en) | 2016-07-04 | 2019-04-30 | Gary David McKnight | Process to conserve cyano-function and improve performance of low molecular weight nitrification inhibitors to improve fertilizer efficiency |
| CN107963950A (en) * | 2016-10-19 | 2018-04-27 | 宁夏农林科学院农业资源与环境研究所 | A kind of nitrification inhibitor type coated carbamide and preparation method thereof |
| CN111423281A (en) * | 2019-01-09 | 2020-07-17 | 北京市农林科学院 | Polyurethane coated controlled release fertilizer and preparation method thereof |
| CN110540468A (en) * | 2019-09-30 | 2019-12-06 | 北京市农林科学院 | Cage type silsesquioxane modified in-situ reaction film-forming type coated controlled release fertilizer and preparation method thereof |
| CN110698304A (en) * | 2019-11-19 | 2020-01-17 | 南华大学 | Coated controlled release fertilizer and preparation method thereof |
| CN116375531A (en) * | 2023-03-30 | 2023-07-04 | 中国农业科学院农业资源与农业区划研究所 | Temperature-sensitive polyurethane coated controlled-release fertilizer and preparation method thereof |
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