CN114874052A - Wrapping agent capable of improving surface moistening durability after salt particle wrapping - Google Patents
Wrapping agent capable of improving surface moistening durability after salt particle wrapping Download PDFInfo
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- CN114874052A CN114874052A CN202210343159.8A CN202210343159A CN114874052A CN 114874052 A CN114874052 A CN 114874052A CN 202210343159 A CN202210343159 A CN 202210343159A CN 114874052 A CN114874052 A CN 114874052A
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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
- C05G3/30—Anti-agglomerating additives; Anti-solidifying additives
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Fertilizers (AREA)
Abstract
The invention relates to a wrapping agent capable of improving surface moistening durability after salt particles are wrapped, which is prepared by the following steps in sequence: (1) injecting 20-70 parts of base mineral oil into a reaction tank, heating to 80 ℃, preserving heat and stirring for 30-50min, adding 5-15 parts of slack wax and 0-70 parts of asphalt, heating to 105 ℃, preserving heat and stirring for 2-3h, and intermittently sampling, wherein the water content of the system is controlled to be less than 0.5%; (2) continuously heating to 120 ℃, adding polyisobutylene, intermittently sampling, adding 0.1-5 parts of antioxidant when the viscosity value measured by sampling reaches 500-2000cp at 60 ℃, preserving heat for 20-30min, cooling to 105 ℃ and preserving heat; (3) sequentially adding 0.5-5 parts of stearic acid series esters, 0.5-5 parts of sorbitan fatty acid ester and 1-5 parts of fatty alcohol phosphate, stirring uniformly, and keeping the temperature for 1-2h to obtain the product. The invention has obvious improvement on the application effects of salt particle anti-caking performance, surface moistening durability and color uniformity.
Description
Technical Field
The invention belongs to the technical field of fertilizers, and particularly relates to a wrapping agent capable of improving surface moistening durability after salt particles are wrapped.
Background
The usage amount of chemical fertilizers in China has entered into a negative growth era, although the food supply is sufficient and the production and the marketing are stable in China, crisis consciousness still needs to be kept all the time, and particularly epidemic situations and natural disasters threaten the stable operation of the food industry chain, so that the market tension is aggravated. In recent two years, the export price of chemical fertilizers in China is continuously innovative and high, meanwhile, the supply of domestic chemical fertilizers is not in short supply, the planting cost is continuously increased, the national attention is attracted, along with the adjustment of policies, the foreign trade market of the chemical fertilizers is cooled on the premise of guaranteeing the supply of the domestic chemical fertilizers, the competition of the domestic stock market becomes stronger, the product quality of the fertilizers is emphasized by various enterprises, the appearances of the products are more selected by the market, after fertilizer particles are wrapped, the problems that the fertilizer particles need to have enough anti-caking capacity, the color and the particle size are uniform, the flowers and the like do not appear are solved, the surface of the fertilizer particles still has certain moist feeling after being stored for a period of time, and the fertilizer particles are more and more generally concerned.
The main components of the fertilizer granules are various salt mixtures, the fertilizer granules are relatively important low-end chemical products, the hygroscopicity of the fertilizer granules is strong based on the special properties of the fertilizer granules, and the storage condition of the fertilizer granules is challenged due to large temperature and humidity changes of a fertilizer plant area. The fertilizer coating agent commonly used in the market is generally coated on fertilizer particles, the caking tendency of the fertilizer is reduced mainly through the physical isolation effect, and the formed oil film can reduce the moisture absorption of the fertilizer particles in the air on one hand and can provide moist feeling for the coated fertilizer particles in a short time on the other hand. However, with the extension of the stacking time of the fertilizer, the penetration of the wrapping agent into the fertilizer particles and the non-wrapped parts of the gaps of the fertilizer particles can be crystallized through repeated moisture absorption and drying processes, so that the product has no moist feeling and is colored, and the product is agglomerated if the product is heavy, which seriously affects the use effect.
According to different varieties of fertilizers, the formulas of the used coating agents are emphasized, and meanwhile, in order to ensure the uniformity of the color of fertilizer granules, the raw materials of the coating agents are selected as much as possible to be consistent with the color of the product. The existing formula generally comprises several substances, such as base oil for brightening, heavy oil and wax for strengthening the surface film strength of fertilizer particles, and surfactant for strengthening the anti-caking capability of the system. In the crude oil refining process, some auxiliary agents can be added, the use of the wrapping agent is adversely affected, base oil can be permeated and deteriorated, the luster and color uniformity of products are affected, heavy oil and wax oil are difficult to wrap in the gap position of the fertilizer due to poor spreadability, fertilizer particles can be caused to have color difference and crystallization in the later period, the surfactant is a double-edged sword, the use amount is large, the anti-caking capacity of the system can be improved in a limited way, but if the surfactant exceeds the critical micelle concentration, the moisture absorption of the fertilizer particles can be enhanced, and the fertilizer particles are adhered to the inner wall of metal in use to cause product waste. The wrapping agent is used as an auxiliary agent in the application of fertilizer products, can only play a certain role under limited environmental conditions, and when the environmental conditions are too severe, the application effect of the product is basically better than nothing, so that good fertilizer products are produced and can still keep moist for a long time, a production enterprise is required to strictly execute national standard production, storage and transportation of the fertilizer, and new products are continuously tried and developed according to the characteristics of the fertilizer products so as to respond to the requirements of customers and markets.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a wrapping agent capable of improving the surface moistening durability of salt particles after being wrapped, which can effectively ensure the looseness of the salt particles in the storage process, avoid the crystallization and deterioration phenomena, ensure the uniform appearance color and luster, and have good moistening feeling after being stored in bags for a period of time, thereby obviously enhancing the competitiveness of products, meeting the market demand and effectively solving the problem of insufficient surface moistening feeling of the fertilizer particles after being wrapped in the prior art.
The technical scheme for solving the technical problems is as follows:
a coating agent for improving the surface moistening durability after salt particles are coated, which can be prepared by the following steps in sequence:
(1) injecting 20-70 parts by mass of base mineral oil into a reaction tank, heating to 80 ℃, then preserving heat and stirring for 30-50min, uniformly adding 5-15 parts by mass of loose wax and 0-70 parts by mass of asphalt, heating to 105 ℃, preserving heat and stirring for 2-3h, and discontinuously sampling, wherein the water content of a mixture system is controlled to be less than 0.5%;
(2) continuously heating the mixture system to 120 ℃, slowly adding polyisobutene to control viscosity, discontinuously sampling, and when the viscosity value measured by sampling reaches a specified range: the viscosity at 60 ℃ is between 500 and 2000cp, 0.1 to 5 mass parts of antioxidant is added, the temperature is kept for 20 to 30min, and then the temperature is slowly reduced to 105 ℃ and kept;
(3) in the heat preservation process, 0.5-5 parts by mass of stearic acid series esters, 0.5-5 parts by mass of sorbitan fatty acid ester and 1-5 parts by mass of fatty alcohol phosphate ester are sequentially added, stirred uniformly and then kept warm for 1-2 hours to obtain the finished product of the wrapping agent.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the stearic acid series ester is at least one of glyceryl stearate, stearate soap ester, octyl stearate and isooctyl stearate.
Further, the stearic acid series ester is glyceryl tristearate.
Further, the specification of the sorbitan fatty acid ester is S-80.
Further, the antioxidant is at least one of tert-butyl hydroquinone, 2, 6-di-tert-butyl phenol, 2, 6-di-tert-butyl p-cresol and N, N-di-sec-butyl p-phenylenediamine.
Further, the antioxidant is tert-butyl hydroquinone.
Further, the slack wax is industrial vaseline.
Further, the polyisobutylene is polyisobutylene PIB 1300.
The invention has the beneficial effects that: compared with the existing wrapping agent, the application effect of the invention on the aspects of salt particle anti-caking performance, surface moistening persistence and color uniformity is obviously improved, the surface moistening of the particles can be obviously improved, the possibility of agglomeration and crystallization is reduced, the granule moistening persistence is enhanced, the color consistency of the particles is effectively ensured, and the competitiveness of the fertilizer product in the market is further improved.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
Unless otherwise indicated, the materials and equipment used in the present invention are conventional in the art (conventional commercial products), and are commercially available, for example, the slack wax of the present invention is available from Shanghai Qiandong New materials, Inc.; the percentages (%) are mass percentages.
The inventor designs and adjusts the raw materials, the dosage and the process parameters according to personal experience through a large amount of experiments and researches, and finally designs the coating agent of the invention, namely the coating agent which can improve the surface moistening durability after the salt particles are coated is prepared by adopting specific raw materials and dosage and a specific preparation method. The fertilizer particles are wrapped by the wrapping agent and stored under the same condition, compared with the fertilizer particles wrapped by the existing wrapping agent, the anti-caking performance of the fertilizer particles is better, the surface moistening feeling is more durable, the color and luster are more uniform, the problems of dry and dry fertilizer particles, crystallization, uneven color and luster and the like after wrapping can be effectively solved, and the market competitiveness of corresponding fertilizer products is improved.
The invention relates to a wrapping agent capable of improving surface moistening durability after salt particles are wrapped, which is prepared by the following steps in sequence:
(1) injecting 20-70 parts by mass of base mineral oil into a reaction tank, heating to 80 ℃, then preserving heat and stirring for 30-50min, uniformly adding 5-15 parts by mass of loose wax and 0-70 parts by mass of asphalt, heating to 105 ℃, preserving heat and stirring for 2-3h, and discontinuously sampling, wherein the water content of a mixture system is controlled to be less than 0.5%;
(2) continuously heating the mixture system to 120 ℃, slowly adding polyisobutene to control viscosity, discontinuously sampling, and when the viscosity value measured by sampling reaches a specified range: the viscosity at 60 ℃ is between 500 and 2000cp, 0.1 to 5 mass parts of antioxidant is added, the temperature is kept for 20 to 30min, and then the temperature is slowly reduced to 105 ℃ and kept;
(3) in the heat preservation process, 0.5-5 parts by mass of stearic acid series esters, 0.5-5 parts by mass of sorbitan fatty acid ester and 1-5 parts by mass of fatty alcohol phosphate ester are sequentially added, stirred uniformly and then kept warm for 1-2 hours to obtain the finished product of the wrapping agent.
Compared with the traditional formula, the coating agent of the invention introduces the nonionic surfactant, effectively reduces the surface tension of the system, can better improve the anti-caking capability of the product by cooperating with the fatty alcohol phosphate, has proper HLB value, good lubricity and emulsibility, enhances the spreadability of the coating agent, is easy to reach the gap of fertilizer particles, obviously improves the coating uniformity, can effectively absorb the water overflowing from the interior of the fertilizer particles, and improves the lubricating feeling of a surface oil film; the polyisobutylene has good plasticity and weather resistance, is mainly used as a viscosity regulator of a product, and can be added in an amount adjusted according to different product formulas so as to achieve the purposes of enhancing the strength and stability of a wrapping film; various auxiliary agents are added in the production process of the base oil, after the base oil is processed into a wrapping agent product, the oil product is easy to oxidize at a high temperature in the subsequent storage and transportation processes, and the antioxidant is added, so that the condition that the color of the oil in the system is deepened can be effectively reduced.
In the invention, the viscosity control in the step (2) is very important, and the final viscosity and performance of a finished product can be influenced, generally speaking, aiming at the same type of substances, under the premise of ensuring the complete coating of the substances within a certain viscosity range, the higher the viscosity of the used finished product is, the higher the strength of an outer coating film is, the longer the product is preserved, the coating agent is used as a particle isolation material, according to the characteristics of particles, through the compounding of various auxiliary agents, the isolation effect is achieved, meanwhile, the additional value of the product can be effectively improved, and the market competitiveness of the product is enhanced.
The stearic acid series esters of the present invention preferably employ at least one of glyceryl stearate, soap stearate, octyl stearate and isooctyl stearate, and more preferably, the stearic acid series esters are glyceryl tristearate. In addition, with the increase of the dosage of the stearic acid series esters by 0.5 → 5, the application effect of the prepared finished product of the wrapping agent is better and better. Based on this, in a more preferred embodiment of the present invention, in step (3), the amount of the stearic series ester is 2.8 to 5 parts.
According to the invention, with the increase of the dosage of the sorbitan fatty acid ester by 0.5 → 5, the application effect of the prepared finished product of the wrapping agent is better and better. In view of this, in a more preferred embodiment of the present invention, in step (3), the sorbitan fatty acid ester is used in an amount of 2.7 to 5 parts.
According to the invention, with the increase of the use amount of the fatty alcohol phosphate 1 → 5, the application effect of the prepared wrapping agent finished product is better and worse. In view of this, in a more preferred embodiment of the present invention, in step (3), the fatty alcohol phosphoric ester is used in an amount of 2 to 4 parts.
The slack wax of the present invention is preferably an industrial petrolatum having the characteristics of high drip point, light color, low oil content, low penetration and low content of polycyclic aromatic hydrocarbons.
Example 1
The coating agent of this example was prepared by the following sequential steps:
(1) injecting 70 parts by mass of base mineral oil into a reaction tank, heating to 80 ℃, then preserving heat and stirring for 50min, uniformly adding 15 parts by mass of slack wax and 10 parts by mass of asphalt, heating to 105 ℃, preserving heat and stirring for 2h, and intermittently sampling, wherein the water content of a mixture system is controlled to be less than 0.5%;
(2) continuously heating the mixture system to 120 ℃, slowly feeding polyisobutylene to control viscosity, intermittently sampling, adding 0.1 part by mass of antioxidant when the viscosity value measured by sampling is 500cp at 60 ℃, keeping the temperature for 20min, slowly cooling to 105 ℃, and keeping the temperature;
(3) and in the heat preservation process, sequentially adding 0.5 part by mass of isooctyl stearate, 0.5 part by mass of sorbitan fatty acid ester and 5 parts by mass of fatty alcohol phosphate, uniformly stirring, and preserving heat for 1h to obtain a finished wrapping agent.
The viscosity value of the coating agent prepared by the embodiment is 410cp at 60 ℃, and the coating agent is suitable for black fertilizer products, the using temperature of the products is between 60 and 70 ℃, and the using amount of the products is 2.4 to 3.0kg/T fertilizer.
Example 2
The coating agent of this example was prepared by the following sequential steps:
(1) injecting 32 parts by mass of base mineral oil into a reaction tank, heating to 80 ℃, preserving heat and stirring for 40min, uniformly adding 15 parts by mass of industrial vaseline and 70 parts by mass of asphalt, heating to 105 ℃, preserving heat and stirring for 3h, and intermittently sampling, wherein the water content of a mixture system is controlled to be less than 0.5%;
(2) continuously heating the mixture system to 120 ℃, slowly feeding polyisobutylene PIB1300 to control viscosity, intermittently sampling, adding 5 parts by mass of tert-butyl hydroquinone when the viscosity value measured by sampling is 2000cp at 60 ℃, preserving heat for 30min, slowly cooling to 105 ℃, and preserving heat;
(3) and in the heat preservation process, sequentially adding 2.8 parts by mass of glyceryl tristearate, 5 parts by mass of sorbitan fatty acid ester S-60 and 2 parts by mass of fatty alcohol phosphate, stirring uniformly, and preserving heat for 1.5 hours to obtain a finished wrapping agent.
The viscosity value of the coating agent prepared by the embodiment is 1884cp at 60 ℃, and the coating agent is suitable for brown fertilizer products, the using temperature of the products is between 90 and 105 ℃, and the using amount of the products is 2.4 to 4.5kg/T fertilizer.
Example 3
The coating agent of this example was prepared by the following sequential steps:
(1) injecting 58 parts by mass of base mineral oil into a reaction tank, heating to 80 ℃, then preserving heat and stirring for 45min, uniformly adding 10 parts by mass of slack wax and 50 parts by mass of asphalt, heating to 105 ℃, preserving heat and stirring for 2.5h, and discontinuously sampling, wherein the water content of a mixture system is controlled to be less than 0.5%;
(2) heating the mixture system to 120 ℃, slowly feeding polyisobutylene PIB1300 to control viscosity, intermittently sampling, adding 2.5 parts by mass of 2, 6-di-tert-butylphenol when the viscosity value measured by sampling is 1260cp at 60 ℃, preserving heat for 30min, slowly cooling to 105 ℃, and preserving heat;
(3) and in the heat preservation process, 4 parts by mass of glyceryl stearate, 3.9 parts by mass of sorbitan fatty acid ester S-80 and 4 parts by mass of fatty alcohol phosphate are sequentially added, the mixture is uniformly stirred, and the heat preservation is carried out for 1.5 hours, so that the finished product of the wrapping agent is obtained.
The viscosity value of the coating agent prepared by the embodiment is 1078cp at 60 ℃, and the coating agent is suitable for brown fertilizer products, the using temperature of the products is 85-95 ℃, and the using amount of the products is 2.0-3.0kg/T fertilizer.
Example 4
The coating agent of this example was prepared by the following sequential steps:
(1) injecting 85 parts by mass of base mineral oil into a reaction tank, heating to 80 ℃, keeping the temperature and stirring for 45min, uniformly adding 5 parts by mass of industrial vaseline, heating to 105 ℃, keeping the temperature and stirring for 2.3h, and discontinuously sampling, wherein the water content of a mixture system is controlled to be less than 0.5%;
(2) heating the mixture system to 120 ℃, slowly feeding polyisobutylene PIB1300 to control viscosity, intermittently sampling, adding 3.8 parts by mass of 2, 6-di-tert-butyl-p-cresol when the viscosity value measured by sampling is 980cp at 60 ℃, preserving heat for 25min, slowly cooling to 105 ℃ and preserving heat;
(3) and in the heat preservation process, sequentially adding 5 parts by mass of stearic acid soap esters, 2.7 parts by mass of sorbitan fatty acid ester S-85 and 3 parts by mass of fatty alcohol phosphate, uniformly stirring, and preserving heat for 2 hours to obtain a finished wrapping agent.
The viscosity value of the coating agent prepared by the embodiment is 726cp at 60 ℃, and the coating agent is suitable for yellow fertilizer products, the using temperature of the products is between 60 and 70 ℃, and the using amount of the products is 1.5 to 2.5kg/T fertilizer.
Example 5
The coating agent of this example was prepared by the following sequential steps:
(1) injecting 60 parts by mass of base mineral oil into a reaction tank, heating to 80 ℃, then preserving heat and stirring for 30min, uniformly adding 30 parts by mass of slack wax, heating to 105 ℃, preserving heat and stirring for 2h, and intermittently sampling, wherein the water content of a mixture system is controlled to be less than 0.5%;
(2) heating the mixture system to 120 ℃, slowly feeding polyisobutylene to control viscosity, intermittently sampling, adding 1.2 parts by mass of N, N-di-sec-butyl-p-phenylenediamine when the viscosity value measured by sampling is 880cp at 60 ℃, keeping the temperature for 25min, slowly cooling to 105 ℃, and keeping the temperature;
(3) and in the heat preservation process, sequentially adding 1.6 parts by mass of octyl stearate, 1.5 parts by mass of sorbitan fatty acid ester S-40 and 1 part by mass of fatty alcohol phosphate, stirring uniformly, and preserving heat for 2 hours to obtain a finished wrapping agent.
The viscosity value of the coating agent prepared by the embodiment is 520cp at 60 ℃, and the coating agent is more suitable for natural-color fertilizer products, the using temperature of the products is between 60 and 65 ℃, and the using amount of the products is 1.0 to 2.4kg/T fertilizer.
Comparative example 1
The encapsulant of this comparative example was prepared by the following sequential steps:
(1) injecting 60 parts by mass of base mineral oil into a reaction tank, heating to 70 ℃, then carrying out heat preservation and stirring for 25min, uniformly adding 5 parts by mass of slack wax and 30 parts by mass of asphalt, heating to 100 ℃, carrying out heat preservation and stirring for 3.5h, and carrying out discontinuous sampling, wherein the water content of a mixture system is controlled to be less than 0.5%;
(2) and continuously heating the mixture system to 110 ℃, preserving heat, adding 5 parts by mass of fatty alcohol phosphate ester in the heat preservation process, uniformly stirring, and preserving heat for 1 hour to obtain a finished product of the wrapping agent.
The viscosity number of the encapsulant prepared in this comparative example was 482cp at 60 ℃.
Comparative example 2
Patent application CN112010694A discloses a coating agent for improving whitening of diammonium phosphate, example 1 of its specific embodiment is taken as comparative example 2 of the present invention.
The coating agent designed by the comparative example is implemented according to the following components (mass percent): 47% of mineral base oil No. 46, 30% of asphalt No. 70, 8% of 1801 stearic acid, 5% of microcrystalline wax No. 70, 8% of mixed alcohol phosphate ester C12-C18 (the proportion of monoester and diester is 5: 5), and 2% of monoethanolamine.
Heating the base oil and the asphalt which are weighed according to the proportion to 80-90 ℃, slowly adding stearic acid, phosphate and microcrystalline wax according to the proportion under the condition of stirring, adding monoethanolamine after the base oil and the asphalt are completely melted, continuously stirring, slowly heating to 105-class sand and 110 ℃, preserving the heat for 30 minutes, cooling to 70-80 ℃, and filling.
The coating agent prepared by the comparative example has the use temperature of 70-90 ℃ and the use amount of 1.5-3kg/T fertilizer.
Examples 1 to 5 described above are all examples of the present invention, and comparative examples 1 and 2 are comparative examples of the present invention. 2.4g of each of the coating agents prepared in examples 1-5 and comparative examples 1 and 2 are sequentially weighed according to 2.4kg/T fertilizer, 1000g of brown fertilizer granules are coated, the application effect is detected according to the following method, and the test result is shown in the following table 1.
The application effect detection method specifically comprises the following steps:
the anti-caking performance detection method comprises the following steps: 600g of the coated fertilizer granules were placed in 4 pressure sleeves (each test sample was loaded with 4 pressure sleeves for parallel testing), and 160N pressure was applied to the sleeves by a press and fixed. And (3) placing the fixed pressure sleeve in a constant temperature and humidity box with the temperature set to be 40 ℃ and the relative humidity set to be 70%, standing for 22h, adjusting the temperature of equipment to be 25 ℃, cooling the test sample, placing for 2h, disassembling the sleeve, placing the formed fertilizer on a crushing press, measuring the crushing pressure of the crushing press, wherein the larger the pressure value is, the poorer the anti-caking effect of the sample is.
The surface feeling durability detection method comprises the following steps: the touch feeling is mainly considered from two aspects of visual feeling and touch feeling, for this purpose, an LS192 gloss meter with an angle of 60 degrees and a KES-SESRU surface roughness tester are used for respectively measuring the values of the gloss value and the friction coefficient thereof when the LS192 gloss meter and the KES-SESRU surface roughness tester are in different conditions. The method comprises the steps of taking 200g of a wrapped sample, measuring a gloss indication value and a friction coefficient value of the wrapped sample as initial values, putting the wrapped sample into a wooden container, sealing and storing the wrapped sample, applying 200N of pressure to the wrapped sample to ensure that the wrapped sample can be extruded and molded, putting the wrapped sample into a room to be placed for 7 days under the conditions of good ventilation and no direct sunlight irradiation, taking out the wrapped sample, measuring the gloss indication value and the friction coefficient value of the wrapped sample again, and taking the wrapped sample as final values, wherein the larger the gloss indication value is, the higher the gloss of the wrapped sample is, and the higher the friction coefficient is, and the smoother the more the wrapped sample is.
The color uniformity detection method comprises the following steps: 200g of a wrapped sample is taken, an initial Lab value of the wrapped sample is measured and recorded by using a colorFlexEZ colorimeter, the sample is placed in a glass container and sealed well, a mark is made, the wrapped sample is placed in a drying oven with the temperature set to 35 ℃, the wrapped sample is placed for 72 hours, the sample is taken out, the Lab value of the wrapped sample is measured, and each index difference value is calculated, wherein the smaller the difference value is, the smaller the color change is, and the more uniform the whole color is.
TABLE 1
As can be seen from the analysis of the test data of examples 1-5 and comparative examples 1 and 2 in Table 1, the application effect of the coating agent of example 1 in terms of anti-caking property of fertilizer granules, surface sense durability and color uniformity is the worst in 5 groups of examples. However, as can be seen from the comparison of the test data of example 1 and comparative examples 1 and 2, the application effect of example 1 is significantly better than that of comparative examples 1 and 2. Therefore, it can be confirmed that the technical effects of the present invention are significantly better than those of comparative examples 1 and 2, and the technical effects of the preferred embodiment of the present invention are better. By adopting the technical scheme of the invention, the application effects of the anti-caking performance, the surface moistening durability and the color uniformity of the fertilizer granules are obviously improved, and the technical problems in the prior art can be effectively solved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A coating agent capable of improving surface moisture durability after salt particles are coated, which is characterized by being prepared by the following sequential steps:
(1) injecting 20-70 parts by mass of base mineral oil into a reaction tank, heating to 80 ℃, then preserving heat and stirring for 30-50min, uniformly adding 5-15 parts by mass of loose wax and 0-70 parts by mass of asphalt, heating to 105 ℃, preserving heat and stirring for 2-3h, and discontinuously sampling, wherein the water content of a mixture system is controlled to be less than 0.5%;
(2) continuously heating the mixture system to 120 ℃, slowly adding polyisobutene to control viscosity, discontinuously sampling, and when the viscosity value measured by sampling reaches a specified range: the viscosity at 60 ℃ is between 500 and 2000cp, 0.1 to 5 mass parts of antioxidant is added, the temperature is kept for 20 to 30min, and then the temperature is slowly reduced to 105 ℃ and kept;
(3) in the heat preservation process, 0.5-5 parts by mass of stearic acid series esters, 0.5-5 parts by mass of sorbitan fatty acid ester and 1-5 parts by mass of fatty alcohol phosphate ester are sequentially added, stirred uniformly and then kept warm for 1-2 hours to obtain the finished product of the wrapping agent.
2. The coating agent according to claim 1, wherein the series of esters of stearic acid is at least one of glyceryl stearate, soap stearate, octyl stearate and isooctyl stearate.
3. The coating agent for improving surface moisture durability after coating salt-based particles according to claim 2, wherein the stearic acid series esters are glyceryl tristearate.
4. The coating agent for improving surface smoothness and durability after coating salt-based particles according to claim 1, wherein the specification of the fatty acid sorbitan ester is S-80.
5. The coating agent according to claim 1, wherein the antioxidant is at least one of tert-butylhydroquinone, 2, 6-di-tert-butylphenol, 2, 6-di-tert-butyl-p-cresol, and N, N-di-sec-butyl-p-phenylenediamine.
6. The coating agent for improving surface smoothness and durability after coating salt-based particles according to claim 5, wherein the antioxidant is tert-butylhydroquinone.
7. The coating agent for improving surface smoothness and durability after coating salt particles according to claim 1, wherein the slack wax is industrial vaseline.
8. The coating agent for improving surface smoothness and durability after coating salt-based particles according to claim 1, wherein the polyisobutylene is polyisobutylene PIB 1300.
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| CN (1) | CN114874052B (en) |
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| CN105565974A (en) * | 2015-12-16 | 2016-05-11 | 湖北富邦科技股份有限公司 | Environment-friendly efficient multifunctional fertilizer wrapping agent as well as preparation method and application |
| CN106187438A (en) * | 2016-06-30 | 2016-12-07 | 云南磷化集团有限公司 | A kind of high-leveling fertilizer coating agent and preparation method thereof |
| US20170190619A1 (en) * | 2015-12-22 | 2017-07-06 | Ingevity South Carolina, Llc | Adhesive compositions with tunable rheological properties |
| CN107001166A (en) * | 2014-11-26 | 2017-08-01 | 亚拉国际有限公司 | For the conditioning agent for the granulated fertilizer for reducing hygroscopicity and dust formation |
| CN110790599A (en) * | 2019-11-29 | 2020-02-14 | 武汉强盛科技有限公司 | Anti-caking wrapping agent for fertilizer and preparation method thereof |
| CN112010694A (en) * | 2019-05-29 | 2020-12-01 | 武汉强盛科技有限公司 | Wrapping agent for improving whitening of diammonium phosphate |
| CN114650976A (en) * | 2019-09-10 | 2022-06-21 | 德国钾盐公司 | Dust binder for fertilizers |
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2022
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| CN107001166A (en) * | 2014-11-26 | 2017-08-01 | 亚拉国际有限公司 | For the conditioning agent for the granulated fertilizer for reducing hygroscopicity and dust formation |
| CN105565974A (en) * | 2015-12-16 | 2016-05-11 | 湖北富邦科技股份有限公司 | Environment-friendly efficient multifunctional fertilizer wrapping agent as well as preparation method and application |
| US20170190619A1 (en) * | 2015-12-22 | 2017-07-06 | Ingevity South Carolina, Llc | Adhesive compositions with tunable rheological properties |
| CN106187438A (en) * | 2016-06-30 | 2016-12-07 | 云南磷化集团有限公司 | A kind of high-leveling fertilizer coating agent and preparation method thereof |
| CN112010694A (en) * | 2019-05-29 | 2020-12-01 | 武汉强盛科技有限公司 | Wrapping agent for improving whitening of diammonium phosphate |
| CN114650976A (en) * | 2019-09-10 | 2022-06-21 | 德国钾盐公司 | Dust binder for fertilizers |
| CN110790599A (en) * | 2019-11-29 | 2020-02-14 | 武汉强盛科技有限公司 | Anti-caking wrapping agent for fertilizer and preparation method thereof |
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| CN114874052B (en) | 2023-04-07 |
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