CN106316620A - Polymer sulfur coated controlled release fertilizer and preparing method thereof - Google Patents
Polymer sulfur coated controlled release fertilizer and preparing method thereof Download PDFInfo
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- CN106316620A CN106316620A CN201610716916.6A CN201610716916A CN106316620A CN 106316620 A CN106316620 A CN 106316620A CN 201610716916 A CN201610716916 A CN 201610716916A CN 106316620 A CN106316620 A CN 106316620A
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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
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C9/00—Fertilisers containing urea or urea compounds
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D1/00—Fertilisers containing potassium
- C05D1/02—Manufacture from potassium chloride or sulfate or double or mixed salts thereof
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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
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- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a polymer sulfur coated slow-release fertilizer and a manufacturing method thereof, first of all, implement granulated fertilizer coating through melting urea, next, reaction of two or above polymer precursors on the surface of granulated fertilizer coated with urine will be achieved to form polymer wrapper, after that, coat the polymer wrapper with modified molten sulfur, and the outermost layer coating is with naturally modified polymer wax combination, which greatly reduces coating materials dosage, improves controlled release properties and nutrient content, the product toughness, abrasive resistance and impact resistance is favorable, low comprehensive cost, membrane materials can be degraded, and of eco-environment protection.
Description
Technical field
The present invention relates to a kind of polymer sulfur coated slow release fertilizer and manufacture method, belong to field of fertilizer manufacturing, more specifically
Say that relating to granulated fertilizer processes layer, polymer coating, sulfur coating, the compositions of natural modified polymer wax according to molten urea solution
The slow release fertilizer of coating order coating, coated fertilizer consumption is few, and controlled capability is good, and toughness, wearability and good impact resistance, nutrient contain
Amount height, utilization rate of fertilizer is high, and integrated cost is low, is suitable for various granulated fertilizers, is not limited by fertilizer type and size, film material
Material can be degraded in soil, environmental friendliness.
Background technology
Fertilizer is the grain of grain, is important capital goods in the agricultural sector, and increases in grain production are played vital effect.I
State is the country that fertilizer consumption is maximum in the world, is also that the most serious country wasted by fertilizer, and utilization rate of fertilizer is low not only to be caused
The waste of ample resources, also causes serious pollution to environment.Sustained-controll-release fertiliser is by physical chemistry means, slow down or
Control nutrients release, so that fertilizer nutrient release is the most synchronize with crop nutrition content demand, thus be greatly improved fertilizer utilization
Rate, and then economize on resources, reduce environmental pollution, Ensuring Food Safety.In recent years, in terms of slow-release or control-release fertilizer, height is given along with country
Degree is paid close attention to and support, and putting into effect is correlated with supports encouragement policy so that it is obtained quick development, and at gardening, lawn, economic work
Certain promotion and application have been had on thing and field crop.But, owing to development time is short, in industrialized production, coated fertilizer choosing
Select, the aspect such as controlled release properties also has a lot of not enough.
Enveloped slow release fertilizer is to be wrapped up granulated fertilizer by hydrophobic membrane materials, by regulation film thickness and
Perforate degree delays and controls fertilizer nutrient release, good with its controlled-release effect, by popular welcome and the accreditation in market, is classical
Slow release fertilizer kind.The most representational product has sulfur coated slow release fertilizer and polymer coating slow release fertilizer.Sulfur coating is urinated
Element is the most successfully to be developed by the U.S. TVA nineteen fifty-seven, and hereafter, through development, Technical comparing is ripe, and Related product is in the U.S.
Patent the 3295950th；3342577；3877415；3903333；In 3991225 and No. 5219465.Chinese patent
95190939.8；95190263.6；00122658.4；200510030371.5；201310568221.4 be all described.The U.S. makees
The definition of sulfur-coated urea is described by thing NNFA, and usual sulfur-coated urea contains nitrogen and the about 10%-of about 30%-40%
The sulfur of 30%, the sealant of 1-2%.
There is sulfur overweight coating in existing sulfur coated slow release fertilizer, causes peplos nutrient content low, and economy is the highest, and sulfur
Coated fertilizer is more crisp, poor toughness, and resistance to impact and wearability are low, and sustained release performance is unstable, early stage explosion release, later stage nutrient
Locking release is the most out, it is impossible to supply nutrient by the nutrient demand in process of crop growth, and its use encapsulant cannot
Improving completely, and exist the most degradable, expensive, complex manufacturing, equipment requirements is high, invests the problems such as bigger.
And also some patent disclosure is coated with one layer of polymeric at sulfur layer, although improve to a certain extent release property and
Impact strength, such as US5599374, but owing to polymeric material is expensive, complex manufacturing, membrane material can not degrade,
Coating rate is the highest, and cost performance is low, it is difficult to generally accepted by market.
Summary of the invention
Not enough for prior art, the present invention provides a kind of polymer sulfur coated slow release fertilizer and manufacture method.This polymerization
It is thinner that thing sulfur coated slow release fertilizer has peplos, and film properties is more excellent, and amount of coating material is few, and controlled release properties is excellent, not by granule
Fertilizer type and grain type and size affect, and this toughness of products, wearability and shock resistance are good, and integrated cost is low, film material
Being easy to get and degradable, preparation method is simple, it is easy to large-scale industrial production.For achieving the above object, the skill that the present invention uses
Art scheme is: a kind of polymer sulfur coated slow release fertilizer and manufacture method, described polymer sulfur coated slow release fertilizer, is granular fertilizer
Material surface is a series of integument the most successively, and the order of integument is that molten urea solution processes layer, polymer wrapper, sulfur
Integument and natural modified polymer wax compositions outer casing.
Further, in described a kind of polymer sulfur coated slow release fertilizer, the weight ratio of each component is: base material and respectively wrapping
Covering layer percentage by weight is granulated fertilizer 85-97%, molten urea solution 0.1-0.5%, polymer 0.5-3%, modified sulphur 1.5-
11%, natural modified polymer wax compositions 0.1-0.5%.
Further, described granulated fertilizer is granule water-soluble plant nutrition, and granularity 1-4.75mm, granule strength is more than
10N, includes but not limited to: carbamide, MAP, Diammonium phosphate (DAP), potassium sulfate, potassium chloride, potassium nitrate, calcium nitrate, calcium ammonium nitrate,
Compound fertilizer, bulk blended fertilizer, organic-inorganic compound fertilizer, magnesium, ferrum, manganese, copper, zinc, boron and or granulated fertilizer mixture.
Another object of the present invention, additionally provides a kind of polymer sulfur coated slow release fertilizer production method, and the method walks
Rapid science, simplicity, efficiently, can realize large-scale industrial production.For achieving the above object, the technical solution used in the present invention
It is: process layer, polymer wrapper, sulfur integument and sky when described granulated fertilizer surface coats molten urea solution the most successively
So during modified poly Wax composition outer casing, the manufacturer of polymer sulfur coated slow release fertilizer comprises the following steps:
1) with molten urea solution coated particle fertilizer, fill up flaw, form smooth finish surface and reactive group bottom；2) two kinds or two
Kind of above polymer reaction precursor coating 1) in molten urea solution basal layer, form polymer wrapper, 3) use modification melted
Sulfur coated polymer integument, to reduce the coating amount of polymer and sulfur, improves controlled release properties simultaneously, 4) use natural modified
Polymer wax compositions coating 3) sulfur integument, improve further toughness and resistance to impact, and potentiation product.
Further, described granulated fertilizer, first it is coated by molten urea solution, fills up flaw, form smooth finish surface
And reactive group bottom, reducing dust, urea melting liquid accounts for fertilizer gross weight 0.1-0.5%.Urine can be added weight ratio 0.1-
One or more in the poly-aspartic-acid of 0.3%, humic acids, alginic acid.
Further, two or more polymer reaction precursor is being sprayed with the granulated fertilizer Surface Creation of molten urea solution
Polymer coating, coating amount accounts for fertilizer gross weight 0.5-3%, and polymer reaction precursor is isocyanates and vegetable oil polyol, its
Middle isocyanates is preferably oleic acid, soybean oil modified vegetable oil based fatty acid isocyanates, and wherein vegetable oil polyol is castor
Oleum Sesami, castor oil derivative, modified Oleum Helianthi, olive oil, Semen Lini oil, Oleum Verniciae fordii, low erucic acid rapeseed oil, Oleum Brassicae campestris, Semen Maydis
One or more in oil.Isocyanates is 25-35:65-75 with the ratio of vegetable oil polyol.Vegetable oil based isocyanate and
Vegetable oil-based polyols, has good biological degradability, will not be to environment, and raw material sources are in vegetable oil,
Belong to Renewable resource, ecological, environmental protective.
Further, use modified molten sulfur coated polymer integument, the described molten sulfur through modification, be to add
The modifying agent of 0.5-5%, modifying agent by thiorubber., dicyclopentadiene and cyclopentadiene oligomer, polyurethanes,
One or more in styrene-butadiene, silane coupler, melted stirring at 135-145 DEG C, under 4-8MPa pressure,
Through filtering, being coated on polymer wrapper, coating accounts for the 1.5-11% of fertilizer gross weight.By to melted sulfur modification,
The paintability making molten sulfur is more excellent, the income stress impact on sulfur film produced when reducing cooling, makes sulfur film more
Densification, intensity, toughness and wearability, impact resistance are improved.
Further, use natural modified polymer wax compositions coating 3) sulfur integument, improve coated granule further
Toughness and resistance to impact, and containing synergist, the nutrient discharged is played potentiation, be greatly improved nutrient in film
Utilization ratio.Described natural modified polymer wax compositions, accounting for fertilizer gross weight is 0.1-0.5%, by natural plants wax and interpolation
Agent modification prepares, and natural plants wax is 80-90%:10-20% with the percentage by weight of additive, the preferred Petiolus Trachycarpi of natural plants wax
One or more in wax, sugarcane wax, rice bran wax and little tree candle wax.Additive is EVA, glycerol, sodium stearate, neem oil,
In dicyandiamide, 2-chloro-6-trimethylpyridine, normal-butyl thiophosphoryl triamine, OP emulsifying agent one or more.Additive is permissible
Make coated product improve film property, stablize nutrition, reduce nutrient loss, prevent adhesion from luming, minimizing dust, prevent floating etc.,
Natural modified polymer wax, i.e. has the readily degradable of wax, has again the film property of polymer so that coated product more toughness,
Wearability and impact resistance, easily degrade meanwhile, will not produce environment and pollute.
Product of the present invention provides the benefit that: obtain thinner, the hydrophobic membrane of more excellent performance, and amount of coating material is less, raising
Nutrient content, controlled release properties are more preferable, have good toughness, improve impact resistance and wearability, not by fertilizer type and granule
Size and outward appearance limit, reduce transport, use in collide, blend and impact on controlled release properties, and film material degradable, completely
Environmental protection, additive improves further and strengthens the fertilizer efficiency discharging nutrient in film, can large-scale industrial production, comprehensively become
This is low, and price is susceptible to user acceptance.
Accompanying drawing explanation
Fig. 1 is manufacturing process schematic diagram of the present invention.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
A kind of polymer sulfur coated slow release fertilizer production method, including step 1): by 130-133 DEG C of molten urea solution process
Granulated fertilizer material, is preheating to 60-80 DEG C by granulated fertilizer, sends into coating rotary drum, in coating rotary drum arrival end spraying molten urine, makes
Grain fertilizer surface more rounding, fill up particle surface flaw, it is provided that polymer reaction functional group, it is provided that excellent peplos substrate.
Step 2) at the middle end of coating rotary drum, two kinds or above polymer precursor shower nozzle are alternately sprayed on granulated fertilizer
Surface, in rotary drum, temperature is at 50-70 DEG C, and polymer precursor forms polymer wrapper in the reaction of granulated fertilizer surface, selected
Polymer precursor is isocyanates and vegetable oil-based polyols, and isocyanates is preferably by oleic acid, the soybean oil modified plant made
Oleyl fatty acid isocyanates, wherein vegetable oil polyol is Oleum Ricini, castor oil derivative, modified Oleum Helianthi, olive oil,
One or more in Semen Lini oil, Oleum Verniciae fordii, low erucic acid rapeseed oil, Oleum Brassicae campestris, Semen Maydis oil, material is renewable vegetable oil, tool
There is excellent degradation property.
Step 3) granulated fertilizer through polymer wrapped is sent into the second coating rotary drum by feed belt, will with the addition of
The modifying agent of 0.5-5%, modifying agent is by thiorubber., dicyclopentadiene and cyclopentadiene oligomer, polyurethanes, benzene
One or more in ethylene-butylene, silane coupler, melted stirring at 135-145 DEG C, under 4-8MPa pressure, warp
Cross filter to filter, filter aperture 200-300 mesh, spray to polymer wrapper by shower nozzle, form sulfur integument, pass through
To sulfur modification, when reducing molten sulfur cooling, shrinkage stress is on toughness and the impact of intensity, is greatly improved the tough of sulfur integument
Property, shock resistance, compactness and stability, containing coupling agent in modified sulfur so that sulfur integument and polymer wrapper
It is tightly combined, improves controlled release properties, decrease the coating layer thickness of sulfur integument simultaneously.
Step 4) last, at the second coating rotary drum downstream end, will be melted natural modified poly-by a number of shower nozzle
Closing Wax composition and be coated uniformly on sulfur cladding surface, melted natural modified polymer wax compositions temperature 50-55 DEG C, by this step
Improve the toughness of product further, fill up surface blemish, improve controlled capability and stability.
By cooler or air natural cooling, make 4) in through natural modified polymer wax compositions coating polymer sulfur
Coated slow release fertiliser granulates progressively cools down, it is to avoid bonding, reaching can packed state.Natural modified polymer wax compositions uses Shanghai
The peplos Wax special of Mei Jia Bioisystech Co., Ltd, model MC001.
Specific embodiment:
1, (weight accounts for the 92% of granulated fertilizer gross weight to urea granules, and wherein the percentage by weight of nitrogen is 42% (42N), first
First preheat, spray urea melting liquid, account for the 0.2% of granulated fertilizer gross weight, urea liquid adds 0.3% alginic acid.Secondly, poly-
Compound coating (is reacted by vegetable oil based isocyanate and vegetable oil polyol), coating thickness based on granulated fertilizer gross weight 2%,
Being modified sulfur coating again, account for the 5.5% of granulated fertilizer gross weight, finally, natural modified polymer wax coats, and accounts for granulated fertilizer total
The 0.3% of weight.Metering packing obtains finished product (42-0-0-0.2U-2P-5.5S-0.3W), 24 hours dissolution rates 3.2%.
2, urea granules (weight accounts for the 94% of granulated fertilizer gross weight, and wherein the percentage by weight of nitrogen is 43% (43N)), first
First preheat, spray urea melting liquid, account for the 0.3% of granulated fertilizer gross weight, urea liquid adds 0.2% poly-Radix Asparagi peace acid.
Secondly, polymer coating (is reacted by vegetable oil based isocyanate and vegetable oil polyol), and coating thickness is total based on granulated fertilizer
The 1.2% of weight, again, is spraying modified sulfur coating, accounts for the 4% of granulated fertilizer gross weight, and finally, natural modified polymer wax is coated with
Cover, account for the 0.5% of granulated fertilizer gross weight.Metering packing obtains finished product (43-0-0-0.3U-1.2P-4S-0.5W), dissolution in 24 hours
Rate 7.6%.
3, (weight accounts for the 85% of granulated fertilizer gross weight to potassium chloride particle, and wherein the percentage by weight of potassium oxide is 51%
(51K2O)), first preheat, spray urea melting liquid, account for the 0.5% of granulated fertilizer gross weight, urea liquid adds 0.1% sea
Alginic acid.Secondly, polymer coating (is reacted by vegetable oil based isocyanate and vegetable oil polyol), and coating thickness is based on granular fertilizer
The 2.5% of material gross weight, again, is spraying modified sulfur coating, accounts for the 11.5% of granulated fertilizer gross weight, finally, natural modified poly-
Conjunction wax coats, and accounts for the 0.5% of granulated fertilizer gross weight.Metering packing obtains finished product (0-0-51-0.5U-2.5P-11.5S-0.5W), and 24
Hour dissolution rate 5.2%.
4, (weight accounts for the 96% of granulated fertilizer gross weight to granular potassium sulfate, and wherein the percentage by weight of potassium oxide is 48%
(48K2O)), first preheat, spray urea melting liquid, account for the 0.4% of granulated fertilizer gross weight, urea liquid adds 0.3% rotten
Phytic acid.Secondly, polymer coating (is reacted by vegetable oil based isocyanate and vegetable oil polyol), and coating thickness is based on granular fertilizer
The 1.2% of material gross weight, is modified sulfur coating again, accounts for the 2% of granulated fertilizer gross weight, and finally, natural modified wax coats, and accounts for
The 0.4% of granulated fertilizer material gross weight.Metering packing obtains finished product (0-0-48-0.4U-1.2P-2S-0.4W), 24 hours dissolution rates 6.2%.
5, Diammonium phosphate (DAP) granule (weight accounts for the 92% of granulated fertilizer gross weight, wherein nitrogen 16%, phosphorus pentoxide 42%), first
First preheat, spray urea melting liquid, account for the 0.5% of granulated fertilizer gross weight, urea liquid adds 0.3% humic acids.Secondly, poly-
Compound coating (is reacted by vegetable oil based isocyanate and vegetable oil polyol), coating thickness based on granulated fertilizer gross weight 2%,
Being modified sulfur coating again, account for the 5% of granulated fertilizer gross weight, finally, natural modified wax coats, and accounts for granulated fertilizer gross weight
0.5%.Metering packing obtains finished product (16-42-0-0.5U-2P-5S-0.5W), 24 hours dissolution rates 2.2%.
6, (weight accounts for the 94% of granulated fertilizer gross weight, wherein nitrogen 14%, phosphorus pentoxide to compound fertilizer (15-15-15) granule
14%, potassium oxide 14%), first preheat, spray urea melting liquid, account for the 0.3% of granulated fertilizer gross weight, urea liquid adds
0.3% alginic acid.Secondly, polymer coating (is reacted by vegetable oil based isocyanate and vegetable oil polyol), coating thickness base
In the 1.4% of granulated fertilizer gross weight, it is modified sulfur coating again, accounts for the 4% of granulated fertilizer gross weight, finally, natural modified wax
Coating, accounts for the 0.3% of granulated fertilizer gross weight.Metering packing obtains finished product (14-14-14-0.3U-1.4P-4S-0.3W), 24 hours
Dissolution rate 5.9%.
The present invention is not limited to a kind of polymer sulfur coated slow release fertilizer described in above-described embodiment and manufacture method thereof,
In polymer sulfur coated slow release fertilizer in the change of component proportion, manufacture method coat coating order, the change of application temperature and
The change of cooling means, all within protection scope of the present invention.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；To the greatest extent
The present invention has been described in detail by pipe with reference to foregoing embodiments, it will be understood by those within the art that: it depends on
So the technical scheme described in foregoing embodiments can be modified, or the most some or all of technical characteristic is entered
Row equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. polymer sulfur coated slow release fertilizer and a manufacture method, containing following steps:
1) with molten urea solution coated particle fertilizer, fill up flaw, form bright and clean granulated fertilizer surface and reactive group bottom；
2) two or more polymer reaction precursor coating 1) in molten urea solution basal layer, formed polymer wrapper；
3) use the melted sulfur coated polymer integument of modification, to reduce the coating amount of polymer and sulfur, improve controlled release simultaneously
Performance；
4) use natural modified polymer wax compositions coating 3) sulfur integument, improve further toughness and resistance to impact, and increase
Effect product, base material and each integument percentage by weight be: granulated fertilizer 85-97%, molten urea solution 0.1-0.5%, polymer
0.5-3%, modified molten sulfur 1.5-11%, natural modified polymer wax compositions 0.1-0.5%.
A kind of polymer sulfur coated slow release fertilizer the most according to claim 1 and manufacture method, it is characterised in that: step 1)
Described fusing urea solution, prepares under the conditions of 130-140 DEG C, can add poly-aspartic-acid, humic acids, sea in urine
One or more in alginic acid.
A kind of polymer sulfur coated slow release fertilizer the most according to claim 2 and manufacture method, it is characterised in that: step 2)
Described polymer is polymer precursor isocyanates and the formation of vegetable oil polyol cross-linking reaction, ratio 0.5-3%.
A kind of polymer sulfur coated slow release fertilizer the most according to claim 3 and manufacture method, it is characterised in that: step 3)
The described molten sulfur through modification, is the modifying agent that with the addition of 0.5-5%, and modifying agent is by thiorubber., dicyclopentadiene
With one or more in cyclopentadiene oligomer, polyurethanes, styrene-butadiene, silane coupler, at 135-
Melted stirring at 145 DEG C, under 4-8MPA pressure, through filtering, is coated on polymer wrapper, coats ratio 1.5-11%.
A kind of polymer sulfur coated slow release fertilizer the most according to claim 4 and manufacture method, it is characterised in that: step 4)
Described natural modified polymer wax compositions, ratio 0.1-0.5%, natural plants wax prepare with additive agent modified, natural plant
Thing wax is 80-90%:10-20% with the percentage by weight of additive, the preferred palm wax of natural plants wax, sugarcane wax, rice bran wax
With one or more in little tree candle wax, additive is EVA, glycerol, sodium stearate, neem oil, dicyandiamide, the chloro-6-of 2-tri-
One or more in picoline, normal-butyl thiophosphoryl triamine, OP emulsifying agent.
A kind of polymer sulfur coated slow release fertilizer the most according to claim 5 and manufacture method, it is characterised in that: granular fertilizer
Material for water-soluble plant nutrition, granularity 1-4.75mm, granule strength is more than 10N, includes but not limited to: carbamide, MAP,
Diammonium phosphate (DAP), potassium sulfate, potassium chloride, potassium nitrate, calcium nitrate, calcium ammonium nitrate, compound fertilizer, bulk blended fertilizer, organic-inorganic compound
Fertilizer, magnesium, ferrum, manganese, copper, zinc, boron and or granulated fertilizer mixture；
Described granulated fertilizer, is first coated by molten urea solution, fills up flaw, forms smooth finish surface and reactive group bottom,
Urea melting liquid accounts for fertilizer gross weight 0.1-0.5%.Urine can be added in poly-aspartic-acid, humic acids, alginic acid
Plant or several.
A kind of polymer sulfur coated slow release fertilizer the most according to claim 6 and manufacture method, it is characterised in that: two kinds or
Two or more polymer reaction precursors account for fertilizer gross weight 0.5-3% in granulated fertilizer Surface Creation polymer coating, coating amount, poly-
Compound reacting precursor is isocyanates and vegetable oil polyol, and wherein isocyanates is preferably oleic acid, soybean oil modified plant
Oleyl fatty acid isocyanates, wherein vegetable oil polyol is Oleum Ricini, castor oil derivative, modified Oleum Helianthi, olive oil,
One or more in Semen Lini oil, Oleum Verniciae fordii, low erucic acid rapeseed oil, Oleum Brassicae campestris, Semen Maydis oil.Isocyanates and vegetable oil polyol
Ratio be 25-35:65-75.
A kind of polymer sulfur coated slow release fertilizer the most according to claim 7 and manufacture method, it is characterised in that: use and change
Property molten sulfur coated polymer integument, described through modified molten sulfur, be the modifying agent that with the addition of 0.5-5%, modified
Agent is by thiorubber., dicyclopentadiene and cyclopentadiene oligomer, polyurethanes, styrene-butadiene, silane coupled
One or more in agent, melted stirring at 135-145 DEG C, under 4-8MPa pressure, through filtering, it is coated on polymer bag
Covering layer, coating accounts for the 1.5-11% of fertilizer gross weight.
A kind of polymer sulfur coated slow release fertilizer the most according to claim 8 and manufacture method, it is characterised in that: use sky
So modified poly Wax composition coating 3) sulfur integument, improve toughness and resistance to impact, and potentiation product further.Described
Natural modified polymer wax compositions, accounting for fertilizer gross weight is 0.1-0.5%, natural plants wax prepare with additive agent modified, natural
Vegetable wax is 80-90%:10-20% with the percentage by weight of additive, the preferred palm wax of natural plants wax, sugarcane wax, Testa oryzae
One or more in wax and little tree candle wax.Additive is EVA, glycerol, sodium stearate, neem oil, dicyandiamide, the chloro-6-of 2-
One or more in trimethylpyridine, normal-butyl thiophosphoryl triamine, OP emulsifying agent.
A kind of polymer sulfur coated slow release fertilizer the most according to claim 9 and manufacture method, it is characterised in that: one is
The order of row integument is that urine processes layer, polymer wrapper, sulfur integument and natural modified polymer wax compositions outer wrapping
Layer, base material and each integument percentage by weight are granulated fertilizer 85-97%, molten urea solution 0.1-0.5%, polymer 0.5-3%,
Modified sulphur 1.5-11%, natural modified polymer wax compositions 0.1-0.5%.
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| CN107840713A (en) * | 2017-11-17 | 2018-03-27 | 北京市农林科学院 | Controlled release inhibitor coated compound fertilizer and preparation method and application |
| CN107879765A (en) * | 2017-11-17 | 2018-04-06 | 北京市农林科学院 | Controlled release inhibitor coated carbamide and preparation method and application |
| CN108358684A (en) * | 2018-05-04 | 2018-08-03 | 安徽省农利化肥股份有限公司 | A kind of special rape acid solution body fertilizer of bark of ash and preparation method thereof |
| CN108752105A (en) * | 2018-07-15 | 2018-11-06 | 秦皇岛天鼎化工有限公司 | A kind of multilayer coated slow release fertilizer |
| CN110304969A (en) * | 2019-08-13 | 2019-10-08 | 苏建平 | A kind of wheat special controlled release fertilizer, preparation method and its application |
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| CN107840713A (en) * | 2017-11-17 | 2018-03-27 | 北京市农林科学院 | Controlled release inhibitor coated compound fertilizer and preparation method and application |
| CN107879765A (en) * | 2017-11-17 | 2018-04-06 | 北京市农林科学院 | Controlled release inhibitor coated carbamide and preparation method and application |
| CN107879765B (en) * | 2017-11-17 | 2021-05-11 | 北京市农林科学院 | Controlled release inhibitor coated urea and preparation method and application thereof |
| CN108358684A (en) * | 2018-05-04 | 2018-08-03 | 安徽省农利化肥股份有限公司 | A kind of special rape acid solution body fertilizer of bark of ash and preparation method thereof |
| CN108752105A (en) * | 2018-07-15 | 2018-11-06 | 秦皇岛天鼎化工有限公司 | A kind of multilayer coated slow release fertilizer |
| CN108752105B (en) * | 2018-07-15 | 2021-05-14 | 秦皇岛天鼎化工有限公司 | Multilayer coated slow-release fertilizer |
| CN110304969A (en) * | 2019-08-13 | 2019-10-08 | 苏建平 | A kind of wheat special controlled release fertilizer, preparation method and its application |
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