CN105330494A - Sulphur coated urea capable of preventing coating layer from breaking and preparation method thereof - Google Patents
Sulphur coated urea capable of preventing coating layer from breaking and preparation method thereof Download PDFInfo
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- CN105330494A CN105330494A CN201510776842.0A CN201510776842A CN105330494A CN 105330494 A CN105330494 A CN 105330494A CN 201510776842 A CN201510776842 A CN 201510776842A CN 105330494 A CN105330494 A CN 105330494A
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- urea
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Abstract
The invention is suitable for the technical field of coated fertilizer, and provides sulphur coated urea capable of preventing a coating layer from breaking and a preparation method thereof. The sulphur coated urea capable of preventing the coating layer from breaking comprises 1000 parts by weight of sulphur coated urea and a coating agent, the surface of the sulphur coated urea is coated with the coating agent which comprises 5-15 parts by weight of urea resin and 0.05-3 parts by weight of auxiliary materials. The preparation method of the sulphur coated urea capable of preventing the coating layer from breaking comprises the following steps that the components are weighed according to the formula of the sulphur coated urea capable of preventing the coating layer from breaking, the urea resin and the auxiliary materials are mixed and processed to obtain a blend, and the blend is dissolved in water to form the coating agent; heating treatment is conducted on the sulphur coated urea; the sulphur coated urea is coated with the coating agent, and drying treatment is conducted.
Description
Technical field
The invention belongs to coated fertilizer technical field, particularly relate to and a kind ofly prevent sulfur coated urea of coating layer fragmentation and preparation method thereof.
Background technology
Along with the development of modern agricultural technology, using in a large number of nitrogen, phosphorus, potassium element, causes soil quality to decline, thus affects crop yield and quality.Particularly a large amount of utilizations of nitrogen, easily cause acidifying pollution and water pollution to soil.Coated urea can significantly improve utilization rate of nitrogen fertilizer and reduce nitrogen to the pollution of edatope, and with sulfur coated urea except improving except utilization rate of nitrogen fertilizer, can also provide sulphur nutrition.But sulfur coated urea is in transport and carrying, its sulphur coating layer is too crisp, easily broken, causes affecting fertilizer efficiency, does not reach corresponding effect.The method of current this problem of solution adopts polyurethanes to apply sulfur coated urea usually, although the method can solve urea coated layer Crushing Problem, exist at degradation problem and Cost Problems, and life-time service can produce certain pollution to soil and environment.
Summary of the invention
The object of the present invention is to provide a kind of sulfur coated urea preventing coating layer fragmentation, be intended to solve that the coating layer of existing sulfur coated urea is frangible or coating layer is not easily degraded, cost is high, and life-time service produces to soil and environment the problem polluted.
Another object of the present invention is to provide a kind of preparation method preventing the sulfur coated urea of coating layer fragmentation.
The present invention realizes like this, a kind of sulfur coated urea preventing coating layer fragmentation, comprise sulfur coated urea and coating, described coating is coated on described sulfur coated urea surface, wherein, described coating comprises urea-formaldehyde resin and auxiliary material, and the parts by weight of described sulfur coated urea, urea-formaldehyde resin and auxiliary material are as described below:
Sulfur coated urea 1000 parts;
Urea-formaldehyde resin 5-15 part;
Auxiliary material 0.05-3 part.
And a kind of preparation method preventing the sulfur coated urea of coating layer fragmentation, comprises the following steps:
Take each component by the above-mentioned formula of the sulfur coated urea of coating layer fragmentation that prevents, described urea-formaldehyde resin and described auxiliary material are carried out combination treatment and obtains blend, by formation coating soluble in water for described blend;
Described sulfur coated urea is carried out heat treated;
Drying treatment is carried out after described coating being applied described sulfur coated urea.
The sulfur coated urea preventing coating layer fragmentation provided by the invention, have on the basis of rear end coating at sulfur coated urea, coating is formed by adding water-soluble mould material urea-formaldehyde resin and the subsidiary material of being degraded into, according to heating self cure film forming effect, coating is carried out to described sulfur coated urea and form flexible membrane, the squeezing action between sulfur coated urea particle can be cushioned, and then reduce the fragmentation of urea coated layer in described sulfur coated urea; Meanwhile, described in prevent the sulfur coated urea of coating layer fragmentation from adopting coating material pollution-free, meet environmental protection theory, and can be used as long-acting nitrogen fertilizer and supplement plant nutrition after decomposing.
Embodiment
In order to make the technical problem to be solved in the present invention, technical scheme and beneficial effect clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiments provide a kind of sulfur coated urea preventing coating layer fragmentation, comprise sulfur coated urea and coating, described coating is coated on described sulfur coated urea surface, wherein, described coating comprises urea-formaldehyde resin and auxiliary material, and the parts by weight of described sulfur coated urea, urea-formaldehyde resin and auxiliary material are as described below:
Sulfur coated urea 1000 parts;
Urea-formaldehyde resin 5-15 part;
Auxiliary material 0.05-3 part.
Concrete, in the embodiment of the present invention, described coating comprises urea-formaldehyde resin and auxiliary material, and wherein, described urea-formaldehyde resin, as the principal constituent of described coating, is degraded into mould material for one is water-soluble.Described urea-formaldehyde resin is pollution-free to soil, easily by soil degrading, simultaneously with certain nutrient, can provide nitrogen nutrition after degraded.In addition, curable film-forming after described urea-formaldehyde resin heating, have certain hardness, and wear resistance is splendid.In view of this, the embodiment of the present invention adopts urea-formaldehyde resin as the bulk composition of coating, realizes the function of coated, easy degraded, nutrient soil simultaneously.As preferred embodiment, described urea-formaldehyde resin is urea formaldehyde, urea acetaldehyde, IBDU, butylene pitch at least one in two ureas.Further, described urea-formaldehyde resin is non-harmful urea formaldehyde.
In the embodiment of the present invention, due to described sulfur coated urea surface irregularity, be used alone urea-formaldehyde resin coating sulfur coated urea, due to skin friction force effect, easily occur coating uneven phenomenon, thus cause urea-formaldehyde resin and sulfur coated urea surface contact not tight, namely levelling property is very poor.In view of this, with the addition of auxiliary material component in coating described in the embodiment of the present invention.The interpolation of described auxiliary material can reduce described sulfur coated urea skin friction force, improves the levelling property of urea-formaldehyde resin on described sulfur coated urea surface, and then reaches the even object of coating.As preferred embodiment, described auxiliary material is at least one in talcum powder, zeolite powder, attapulgite.Further, described auxiliary material is preferably low, the effective zeolite powder of cost.
In described coating, described auxiliary material is mainly used for reducing the frictional force in coating, ensures the homogeneity of coating.Therefore, if described auxiliary material very little, stepless action is not had; If described auxiliary material is too many, the homogeneity of coating can be affected again, form retroaction.Therefore, as preferred embodiment, the weight ratio of described urea-formaldehyde resin and described auxiliary material is 100:(1-20).Further, the weight ratio of described urea-formaldehyde resin and described auxiliary material more elects 100:1 as.
As a most preferred embodiment, in described coating, described urea-formaldehyde resin is urea formaldehyde, and described auxiliary material is zeolite powder, and the weight ratio of described urea formaldehyde and described zeolite powder is 10:1.
In the embodiment of the present invention, after described urea-formaldehyde resin and described auxiliary material form blend, adding water stirs into solution and forms solution shape, namely obtains coating, and wherein, described amount of water is preferably and the weight such as described blend.
In the embodiment of the present invention, the consumption of described coating is the 0.5%-2% of described sulfur coated urea quality, formed thus coated evenly and the suitable coating layer of thickness.
The sulfur coated urea of coating layer fragmentation that what the embodiment of the present invention provided prevent, have on the basis of rear end coating at sulfur coated urea, coating is formed by adding water-soluble mould material urea-formaldehyde resin and the subsidiary material of being degraded into, according to heating self cure film forming effect, coating is carried out to described sulfur coated urea and form flexible membrane, the squeezing action between sulfur coated urea particle can be cushioned, and then reduce the fragmentation of urea coated layer in described sulfur coated urea; Meanwhile, described in prevent the sulfur coated urea of coating layer fragmentation from adopting coating material pollution-free, meet environmental protection theory, and can be used as long-acting nitrogen fertilizer and supplement plant nutrition after decomposing.
Prevent the sulfur coated urea of coating layer fragmentation from preparing by following method described in the embodiment of the present invention.
And the embodiment of the present invention additionally provides a kind of preparation method preventing the sulfur coated urea of coating layer fragmentation, comprises the following steps:
S01. take each component by the above-mentioned formula of the sulfur coated urea of coating layer fragmentation that prevents, described urea-formaldehyde resin and described auxiliary material are carried out combination treatment and obtains blend, by formation coating soluble in water for described blend;
S02. described sulfur coated urea is carried out heat treated;
S03. drying treatment is carried out after described coating being applied described sulfur coated urea.
Concrete, in above-mentioned steps S01, described in prevent the formula of the sulfur coated urea of coating layer fragmentation and preferred content component described above, in order to save length, repeat no more herein.
In the embodiment of the present invention, described urea-formaldehyde resin and described auxiliary material are carried out combination treatment and obtains blend, by formation coating soluble in water for described blend.The consumption of described water is preferably and described blend equivalent.
In above-mentioned steps S02, described sulfur coated urea is carried out heat treated, so that in following coating procedure, the reaction of urea-formaldehyde resin film-forming can be accelerated on the one hand; The moisture in described coating can be dried on the other hand.As preferred embodiment, the temperature of described heat treated is 60-80 DEG C, more preferably 70 DEG C.The too high Quality Down easily causing coating film of described temperature; Temperature is too low, does not have and accelerates film-formation result and dry water function.
In above-mentioned steps S03, described sulfur coated urea is after heat treated, and temperature remains on more than 60 DEG C, and described coating is applied described sulfur coated urea, and described coating method can adopt spraying method to realize.Applied by described coating in the step of described sulfur coated urea, the consumption of described coating is preferably the 0.5-2% of described sulfur coated urea quality.
After coated process, carry out drying treatment, preferably, the temperature of described drying treatment is 60-100 DEG C, and time of drying is 7-8min.Described drying treatment can adopt warm air drying, certainly, is not limited to this mode.
Further, the embodiment of the present invention also comprises the sulfur coated urea after by described drying treatment and packs after overcooling, and described cooling can directly adopt cooling cylinder to cool.
In the embodiment of the present invention, described coating becomes flexible membrane according to heating self cure film forming effect coating sulfur coated urea surface, and method is simply controlled, and covered effect is good, the coating film intensity improving described sulfur coated urea can be done, the sulfur coated urea prepared, be suitable for long-distance transport.
Be described below in conjunction with specific embodiment.
Embodiment 1
A kind of sulfur coated urea preventing coating layer fragmentation, comprise sulfur coated urea and coating, described coating is coated on described sulfur coated urea surface, wherein, described coating comprises urea-formaldehyde resin and auxiliary material, and the parts by weight of described sulfur coated urea, urea-formaldehyde resin and auxiliary material are as described below:
Sulfur coated urea 1000 parts;
Urea-formaldehyde resin 5 parts;
Auxiliary material 0.05 part,
Wherein, described urea-formaldehyde resin is urea formaldehyde, and described auxiliary material is zeolite powder.
And a kind of preparation method preventing the sulfur coated urea of coating layer fragmentation, comprises the following steps:
Take each component by the above-mentioned formula of the sulfur coated urea of coating layer fragmentation that prevents, described urea-formaldehyde resin and described auxiliary material are carried out combination treatment and obtains blend, the water gaging such as to add and stir into formation coating;
Described sulfur coated urea is carried out heat treated in lab scale coating machine, is heated to 60 DEG C;
After described coating is sprayed described sulfur coated urea, within continuous heating 7-8 minute, dry.
Embodiment 2
A kind ofly prevent sulfur coated urea of coating layer fragmentation and preparation method thereof, the number of described auxiliary material, on the basis of described embodiment 1, is adjusted to 0.5 part by its formula, and method is with reference to embodiment 1.
Embodiment 3
A kind ofly prevent sulfur coated urea of coating layer fragmentation and preparation method thereof, the number of described auxiliary material, on the basis of described embodiment 1, is adjusted to 1 part by its formula, and method is with reference to embodiment 1.
Embodiment 4
A kind ofly prevent sulfur coated urea of coating layer fragmentation and preparation method thereof, its formula is on the basis of described embodiment 1, and described urea-formaldehyde resin is adjusted to 10 parts, and the number of described auxiliary material is adjusted to 0.1 part, and method is with reference to embodiment 1.
Embodiment 5
A kind ofly prevent sulfur coated urea of coating layer fragmentation and preparation method thereof, its formula is on the basis of described embodiment 1, and described urea-formaldehyde resin is adjusted to 10 parts, and the number of described auxiliary material is adjusted to 1 part, and method is with reference to embodiment 1.
Embodiment 6
A kind ofly prevent sulfur coated urea of coating layer fragmentation and preparation method thereof, its formula is on the basis of described embodiment 1, and described urea-formaldehyde resin is adjusted to 10 parts, and the number of described auxiliary material is adjusted to 2 parts, and method is with reference to embodiment 1.
Embodiment 7
A kind ofly prevent sulfur coated urea of coating layer fragmentation and preparation method thereof, its formula is on the basis of described embodiment 1, and described urea-formaldehyde resin is adjusted to 15 parts, and the number of described auxiliary material is adjusted to 0.15 part, and method is with reference to embodiment 1.
Embodiment 8
A kind ofly prevent sulfur coated urea of coating layer fragmentation and preparation method thereof, its formula is on the basis of described embodiment 1, and described urea-formaldehyde resin is adjusted to 15 parts, and the number of described auxiliary material is adjusted to 1.5 parts, and method is with reference to embodiment 1.
Embodiment 9
A kind ofly prevent sulfur coated urea of coating layer fragmentation and preparation method thereof, its formula is on the basis of described embodiment 1, and described urea-formaldehyde resin is adjusted to 15 parts, and the number of described auxiliary material is adjusted to 3 parts, and method is with reference to embodiment 1.
Embodiment 10
A kind ofly prevent sulfur coated urea of coating layer fragmentation and preparation method thereof, its formula is on the basis of described embodiment 1, and described urea-formaldehyde resin is urea acetaldehyde, and described urea-formaldehyde resin is adjusted to 10 parts, and the number of described auxiliary material is adjusted to 2 parts, and method is with reference to embodiment 1.
Embodiment 11
A kind ofly prevent sulfur coated urea of coating layer fragmentation and preparation method thereof, its formula is on the basis of described embodiment 1, and described urea-formaldehyde resin is urea acetaldehyde, and described urea-formaldehyde resin is adjusted to 10 parts, and the number of described auxiliary material is adjusted to 1 part, and method is with reference to embodiment 1.
Embodiment 12
A kind ofly prevent sulfur coated urea of coating layer fragmentation and preparation method thereof, its formula is on the basis of described embodiment 1, and described urea-formaldehyde resin is urea acetaldehyde, described auxiliary material is talcum powder, and described urea-formaldehyde resin is adjusted to 10 parts, the number of described auxiliary material is adjusted to 0.1 part, and method is with reference to embodiment 1.
Embodiment 13
A kind ofly prevent sulfur coated urea of coating layer fragmentation and preparation method thereof, its formula is on the basis of described embodiment 1, and described urea-formaldehyde resin is urea acetaldehyde, described auxiliary material is talcum powder, and described urea-formaldehyde resin is adjusted to 10 parts, the number of described auxiliary material is adjusted to 1 part, and method is with reference to embodiment 1.
Embodiment 14
A kind ofly prevent sulfur coated urea of coating layer fragmentation and preparation method thereof, its formula is on the basis of described embodiment 1, and described urea-formaldehyde resin is urea acetaldehyde, described auxiliary material is talcum powder, and described urea-formaldehyde resin is adjusted to 15 parts, the number of described auxiliary material is adjusted to 1.5 parts, and method is with reference to embodiment 1.
Comparative example 1 (blank)
Coating described in the embodiment of the present invention is not used to carry out coated sulfur coated urea.
Comparative example 2 (polyester coating)
Use the sulfur coated urea of polyurethanes coating.
The product obtained by above-described embodiment 1-14 and comparative example 1-2 thereof carries out the degree of fragmentation contrast under different treatment, and result is as shown in table 1 below.
Table 1
As seen from the above table, the coated sulfur coated urea intensity that obtains of the embodiment of the present invention more better, not easily broken.Wherein, the effect of embodiment 5 product is identical with polyester coating 0.5% effect, but polyester cost compare urea-formaldehyde resin is high by more than 30%, visible, and described in the embodiment of the present invention, product cost is lower; In addition, there is contaminate environment and degradation problem in the coated sulfur coated urea of urethane, and embodiment of the present invention coating and pollution-free, meet environmental protection theory.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. one kind prevents the sulfur coated urea of coating layer fragmentation, it is characterized in that, comprise sulfur coated urea and coating, described coating is coated on described sulfur coated urea surface, wherein, described coating comprises urea-formaldehyde resin and auxiliary material, and the parts by weight of described sulfur coated urea, urea-formaldehyde resin and auxiliary material are as described below:
Sulfur coated urea 1000 parts;
Urea-formaldehyde resin 5-15 part;
Auxiliary material 0.05-3 part.
2. prevent the sulfur coated urea of coating layer fragmentation as claimed in claim 1, it is characterized in that, described urea-formaldehyde resin is urea formaldehyde, urea acetaldehyde, IBDU, butylene pitch at least one in two ureas.
3. prevent the sulfur coated urea of coating layer fragmentation as claimed in claim 1, it is characterized in that, described auxiliary material is at least one in talcum powder, zeolite powder, attapulgite.
4. the sulfur coated urea preventing coating layer fragmentation as described in as arbitrary in claim 1-3, it is characterized in that, in described coating, the weight ratio of described urea-formaldehyde resin and described auxiliary material is 100:(1-20).
5. the sulfur coated urea preventing coating layer fragmentation as described in as arbitrary in claim 1-3, it is characterized in that, the consumption of described coating is the 0.5-2% of described sulfur coated urea quality.
6. the sulfur coated urea preventing coating layer fragmentation as described in as arbitrary in claim 1-3, it is characterized in that, described urea-formaldehyde resin is urea formaldehyde, and described auxiliary material is zeolite powder, and the weight ratio of described urea formaldehyde and described zeolite powder is 10:1.
7. prevent a preparation method for the sulfur coated urea of coating layer fragmentation, comprise the following steps:
Take each component by the formula of the sulfur coated urea of coating layer fragmentation that prevents as described in as arbitrary in claim 1-6, described urea-formaldehyde resin and described auxiliary material are carried out combination treatment and obtains blend, by formation coating soluble in water for described blend;
Described sulfur coated urea is carried out heat treated;
Drying treatment is carried out after described coating being applied described sulfur coated urea.
8. prevent the preparation method of the sulfur coated urea of coating layer fragmentation as claimed in claim 7, it is characterized in that, the temperature of described heat treated is 60-80 DEG C.
9. prevent the preparation method of the sulfur coated urea of coating layer fragmentation as claimed in claim 7, it is characterized in that, applied by described coating in the step of described sulfur coated urea, the consumption of described coating is the 0.5-2% of described sulfur coated urea quality.
10. the preparation method preventing the sulfur coated urea of coating layer fragmentation as described in as arbitrary in claim 7-9, it is characterized in that, the temperature of described drying treatment is 60-100 DEG C, and time of drying is 7-8min.
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Cited By (4)
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| CN107473804A (en) * | 2016-06-08 | 2017-12-15 | 深圳市芭田生态工程股份有限公司 | Modified urine base manure and preparation method thereof and mixed fertilizer |
| CN107522535A (en) * | 2017-08-15 | 2017-12-29 | 深圳市芭田生态工程股份有限公司 | Compound fertilizer anticaking agent and composite fertilizer with slow releasing function |
| WO2019153776A1 (en) * | 2018-02-09 | 2019-08-15 | 郑州高富肥料有限公司 | Multi-coating-structure controlled-release fertilizer and preparation method therefor |
| WO2019153775A1 (en) * | 2018-02-09 | 2019-08-15 | 郑州高富肥料有限公司 | Sustained-release and controlled-release fertilizer having core-shell structure and preparation method therefor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107473804A (en) * | 2016-06-08 | 2017-12-15 | 深圳市芭田生态工程股份有限公司 | Modified urine base manure and preparation method thereof and mixed fertilizer |
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| WO2019153776A1 (en) * | 2018-02-09 | 2019-08-15 | 郑州高富肥料有限公司 | Multi-coating-structure controlled-release fertilizer and preparation method therefor |
| WO2019153775A1 (en) * | 2018-02-09 | 2019-08-15 | 郑州高富肥料有限公司 | Sustained-release and controlled-release fertilizer having core-shell structure and preparation method therefor |
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Application publication date: 20160217 |