KR20200042553A - Multifunctional mulching film - Google Patents

Abstract

An objective of the present invention is to provide a multifunctional mulching film, in which a sustained-release agent is mixed with a synthetic resin to be uniformly distributed, such that active ingredients, such as an agricultural chemical component and the like, are released to only a portion covered with the multifunctional mulching film, thereby allowing the multifunctional mulching film to uniformly and safely release the active ingredients within a range covered with the multifunctional mulching film to be safely and conveniently used. Moreover, another objective of the present invention is to provide a multifunctional mulching film, in which a water-based anti-staining coating composition using wood tar is added with the sustained-release agent, such that persistency of anti-staining performance is largely increased by wood vinegar contained in the wood tar and antiseptic, anti-insect, anti-root, deodorization, antibacterial, and condensation prevention performances can be increased. According to the present invention, the multifunctional mulching film comprises: 96 to 99.8 weight percent of a synthetic resin; 0.1 to 2 weight percent of a sustained-release agent; and 0.1 to 2 weight percent of a water-based anti-staining coating composition.

Description

Multifunctional mulching film {MULTIFUNCTIONAL MULCHING FILM}

The present invention relates to a multi-functional mulching film (Mulching Film), more specifically, sustained-release preparations and antibacterials capable of efficiently releasing and controlling active ingredients such as pesticides in mulching films used for moisture retention or weed control purposes By mixing and preparing an aqueous antifouling coating composition having excellent effects such as insect repellent, the sustained release formulation and the aqueous antifouling coating composition are uniformly distributed and fixed at appropriate positions so that the active ingredient can be evenly released to the ground covered with a multi-functional mulching film for a long time. It is done.

The following (Patent Document 1) discloses a technique related to a sustained-release preparation capable of effectively releasing an active ingredient such as a pesticide and easily controlling the release.

(Patent Document 1) Korean Registered Patent No. 1148329

-Si-O- porous carrier comprising a site and a biodegradable polymer; And an active ingredient supported by the porous carrier. In addition, preparing a first solution in which a biodegradable polymer is dissolved by dissolving a biodegradable polymer in a basic aqueous solution in which a precursor capable of forming a -Si-O- site is dissolved in a porous carrier; Irradiating the first solution with radiation; Preparing a second solution having a lower acidity than the first solution by adding an active ingredient to the irradiated first solution; And it discloses a method for producing a sustained release preparation comprising the step of drying the second solution.

However, such sustained-release preparations are effective in increasing the duration of the active ingredient by allowing the active ingredient such as a fertilizer component or a pesticide component to gradually release, but the following problems occur.

(1) When spraying a sustained-release preparation, it spreads evenly over the ground and spreads slowly and evenly over the ground where the drug substance is applied, but over time, the sustained-release preparation spreads evenly to either side.

(2) That is, if the wind blows or rains after spraying the sustained-release preparation, there is a fear that the sustained-release preparation is easily blown by the wind or floats in the rain and deviates from the original sprayed position.

(3) In addition, the footwear of the worker spraying the sustained-release preparation or workers removing weeds, or the area where the sustained-release preparation was sprayed, or the wild animal wandering in search of food, etc., may deviate from the original sprayed position. There are times.

(4) The sustained-release preparations deviating from the area where they were first applied may release the active ingredients, etc. from a location other than the location where the original active ingredients are to be sprayed, or the sustained-release preparations may accumulate in a specific area to be more effective only in that area. A problem arises in releasing components and the like.

(5) If the active ingredient or the like in the place where the sustained-release preparation was originally applied is not released, the hassle of repeatedly applying the sustained-release preparation and the cost of spraying increase.

(6) In addition, the sustained-release preparation deviating from the original position releases the active ingredient in the place where the sustained-release preparation is accumulated. As a result, active ingredients such as pesticides can be a major threat to livestock, people living around them, and birds.

(7) Particularly, sustained-release preparations that are intensively accumulated on either side due to rain or wind emit active ingredients and the like in proportion to the amount of sustained-release preparations accumulated, thereby releasing more active ingredients and the like in proportion to the amount. Not only does it pollute the environment, it can also threaten animals and humans.

(8) In addition, when the active ingredient does not release for a long time, such as in winter, or when it is released slowly, the contaminated area remains contaminated until the active ingredient or the like is completely released from the sustained release preparation, and contaminated for a long period of time. Can't use area.

(9) Therefore, it takes a long time to cleanse or neutralize the contaminated area, or a large cost is required.

Korean Registered Patent No. 1148329 (Registration Date: 2012.05.14)

The present invention is intended to solve this problem, and is configured to be uniformly dispersed by mixing a sustained-release preparation in a synthetic resin, so that it is possible to release active ingredients such as pesticide ingredients evenly over the part covered with a multi-functional mulching film, multifunctional An object of the present invention is to provide a multi-functional mulching film that can be used safely and conveniently by uniformly and safely releasing active ingredients within a range covered with the mulching film.

In addition, the present invention, by adding an aqueous antifouling coating composition using a wood tar with a sustained release preparation, the persistence of the antifouling performance is greatly increased due to the herb acid contained in the wood tar, antibacterial, insect repellent, rooting, deodorization, antibacterial, Another object is to provide a multi-functional mulching film that can improve the anti-condensation performance.

Multi-functional mulching film according to the present invention for achieving this object,

Synthetic resin 96 ~ 99.8% by weight

Sustained release preparations 0.1-2% by weight

Water-based antifouling paint composition 0.1-2% by weight

It is characterized by consisting of.

The multifunctional mulching film according to the present invention has the following effects.

(1) The active ingredient such as a pesticide can be fixed in a fixed position and an aqueous antifouling coating composition excellent in effects such as antimicrobial and insect repellent and a sustained release preparation capable of efficient release and control.

(2) Since the fixing at this time is fixed by adding the sustained release formulation and the aqueous antifouling coating composition to the synthetic resin, the sustained release formulation and the aqueous antifouling coating composition can be distributed and fixed evenly distributed over the synthetic resin.

(3) Thus, since the active ingredients such as pesticides released from the sustained release preparation can be evenly released on the ground covered with the multifunctional mulching film to which the present invention belongs, sufficient active ingredient effects can be obtained.

(4) In particular, it is possible to prevent the sustained-release preparation or the water-based antifouling paint composition from being lost by wind, rain, and workers or wild animals.

(5) Thus, the sustained-release preparation or the water-based antifouling coating composition is prevented from being pulled, blown, or agglomerated to one side, whereby the effect of the active ingredient can be obtained evenly in an area covered with a multi-functional mulching film.

(6) Since the multi-functional mulching film according to the present invention blocks rainwater, moisture, and sunlight, it is possible to minimize the effect on the release amount from the sustained-release preparation, so that it is possible to release active ingredients and the like under optimal release conditions. .

(7) Since the multi-functional mulching film according to the present invention covers the ground and releases an active ingredient, productivity can be increased through moisture retention or weed control on the ground.

(8) Since the multifunctional mulching film according to the present invention can be spread and fixed in a desired place, release of an active ingredient and antibacterial effect can be obtained through a sustained release preparation and an aqueous antifouling coating composition, so anyone can easily and conveniently use the multifunctional mulching film. Construction can achieve these various effects.

1 is a conceptual diagram of a porous carrier comprising a -Si-O- site and a biodegradable polymer.
[Fig. 2] is an electron micrograph when the radiation dose is different.
3 is an electron microscope photograph of each step of the magnesium sulfate sustained release preparation process.
4 is an electron micrograph of the product according to the comparative example.
5 is a TEM (Transmission Electron Microscopy) picture of the magnesium sulfate sustained-release preparation.
6 is a TEM photograph of the magnesium sulfate sustained-release preparation and the spectrum for the sustained-release preparation.
7 is a TEM photograph of the magnesium sulfate sustained-release preparation and an ELS (Electrophoretic Light Scattering) analysis photograph.
8 is a graph showing the release amount of SO4 ^- ions over time in the sustained release test.
9 is a SEM photograph of a sustained release phosphorous acid micro hydrating agent formulation.
[Fig. 10] is an SEM photograph of a micro hydrating agent formulation when 2 g of phosphorous acid is administered in [Example 2].
[Fig. 11] is an SEM photograph of a micro hydrating agent formulation when 4 g of phosphorous acid is administered in [Example 2].
[Fig. 12] is an SEM photograph of a micro-hydrated agent formulation when 8 g of phosphorous acid is administered in [Example 2].
13 is a spectrum showing SEM pictures and EDX analysis results of the sustained-release phosphite micro-hydrate formulation according to [Example 2].
14 is a TEM photograph of a sustained release phosphorous acid micro hydrating agent formulation.
15 is a graph showing the results of sustained release test of the formulation according to [Example 2].

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Prior to this, the terms or words used in the specification and claims should not be construed as being limited to ordinary or lexical meanings, and the inventor may appropriately define the concept of terms in order to describe his or her invention in the best way. According to the principle that it can be interpreted as meanings and concepts consistent with the technical spirit of the present invention.

Therefore, the configuration shown in the embodiments and drawings described in this specification is only one of the most preferred embodiments of the present invention and does not represent all of the technical spirit of the present invention, and various equivalents that can replace them at the time of this application It should be understood that there may be and variations.

(Configuration)

The multi-functional mulching film according to the present invention, as shown in [Fig. 1] to [Fig. 15], is prepared by adding a sustained release formulation and an aqueous antifouling coating composition to a synthetic resin and mixing them, followed by injection or the like to produce a film.

Thus, the multi-functional mulching film, since the sustained-release preparation and water-based antifouling coating composition can be evenly dispersed in the multi-functional mulching film, in the part covered with the multi-functional multing film without being affected by wind, rain, and movements of humans or animals. It allows organic components such as pesticides to be evenly released, and at the same time, the durability of antifouling performance is greatly increased due to the grass-acid contained in the wood tar contained in the water-based anti-fouling coating composition, and antibacterial, insect-repellent, anti-odor, anti-bacterial, and condensation It was made possible to obtain preventive performance.

Hereinafter, this configuration will be described in more detail with reference to the accompanying drawings.

Here, the present invention uses the technique described in Patent Registration No. 10-1148329 for sustained release formulations contained in synthetic resins, and the technique described in Patent Registration No. 10-0994883 for aqueous antifouling coating compositions. Accordingly, below, the mixing ratio of the synthetic resin, the sustained release formulation, and the aqueous antifouling coating composition will be described first, and the sustained release formulation and the aqueous antifouling coating composition will be described based on the respective patent documents.

<Mix ratio>

In the present invention, a synthetic resin, a sustained release preparation, and an aqueous antifouling coating composition are mixed and used in the ratio shown in Table 1 below.

ingredient

Content (% by weight)
Synthetic resin

96 ~ 99.8
Sustained release preparations

0.1 ~ 2
Water-based antifouling paint composition

0.1 ~ 2

Here, the synthetic resin may be used as long as it can be used to produce a mulching film in the technical field to which the present invention belongs, but for example, at least among PE (polyethylene), polypropylene (polypropylene), and polyester (Polyester) Use one that consists of one.

<Slow-release preparation>

1 is a conceptual diagram of a porous carrier comprising a -Si-O- site and a biodegradable polymer. Referring to FIG. 1, in the sustained-release preparation 100, the -Si-O- site of the porous carrier and the biodegradable polymer 110 are combined, and the biodegradable polymer is shared with the -Si-O- site. Combined.

In order to prepare the sustained-release preparation, first, a first solution in which a biodegradable polymer is dissolved is prepared by dissolving a biodegradable polymer in a basic aqueous solution in which a precursor capable of forming a -Si-O- site in a porous carrier is dissolved. do.

The porous carrier constitutes the skeleton of the sustained-release preparation, which is the final product. Silica may be used as the porous carrier. When the porous carrier is silica, sodium silicate is used as the precursor, and the sodium silicate is dissolved in distilled water to form a strong alkali aqueous solution. The biodegradable polymer is added and dissolved in the strong alkaline aqueous solution.

The biodegradable polymer is a polymer that is decomposed by light or microorganisms, and is introduced as a guest at the -Si-O- site constituting the skeleton of the sustained release agent to control the release of the sustained release agent. Biodegradable polymers include curdlan, cellulose, pullulan, gellan, zooglan, levan, xantan gum, starch and Chitosan may be used, and the biodegradable polymer may be used in combination of two or more.

In particular, the curdlan among the biodegradable polymers has a (1,3) -beta-glucan structure as shown in [Chemical Formula 1].

The curdlan is a polysaccharide produced in Alcaligenes faecalis, Agrobacterium, and has a glucose repeating unit in which the first and third carbon atoms of the glucose ring are linked by beta bonds. Curdran's primary structure is a long chain, but due to intra- and inter-molecular hydrogen bonding, it forms a complex three-dimensional structure. Curdran hardly crystallizes in its natural state and remains in powder form. Curdran powder is generally not soluble in water below about 40 ° C, but in an alkaline solution, hydrogen bonds are ionized and readily dissolved. Curdlan gels when heated to a temperature of 54 ° C or higher. As the heating temperature, heating time, and concentration increase, a hard gel forms. Gels are formed by the interaction of microfibrils made of curdran molecules. Since the sodium silicate aqueous solution is strongly alkaline, stirring and gradually administering curdlan dissolves curdlan completely to produce a solution with a slight viscosity (first solution).

A radical scavenger may be added to the first solution. The radical scavenger serves to scavenge unnecessary radicals generated during the reaction, and alcohols such as ethanol, methanol, and isopropanol can be used.

The first solution prepared as above is irradiated with radiation. Radiation includes gamma rays. Irradiation is irradiated in the range of 27 to 100 KGy, but a sufficient reaction occurs only when a dose of 30 KGy or more is obtained, and particularly 30 to 50 KGy is preferable. The polymer bond of the biodegradable polymer is broken due to irradiation, and becomes low-molecular, and enters the skeleton of the porous carrier as a guest.

[Fig. 2] is an electron microscope photograph of the case where the radiation dose is different from the reaction solution. Referring to [Figure 2], when the irradiation dose is 5KGy ([Figure 2 (a)]), 10KGy ([Figure 2 (b)]) and 20KGy ([Figure 2 (c)]), nanoparticles Is not formed sufficiently, it can be confirmed that a sufficient reaction may occur when irradiated with 30KGy ([Fig. 2 (d)]) or more.

The first solution irradiated with radiation has no viscosity. In the case of using curdlan as a biodegradable polymer, it can be confirmed through an electron microscope that curdran still maintains a plate-like structure after irradiation. An active ingredient is added to the first solution to prepare a second solution having a lower acidity than the first solution. When the acidity of the solution decreases by adding the active ingredient, a nanoparticle structure is formed. It is considered that the determination of the active ingredient is not observed when observed with an electron microscope, and it is considered that the active ingredient is included in the nanoparticle matrix.

3 is an electron microscope photograph of each step of the magnesium sulfate sustained release preparation process. Referring to FIG. 3, it was confirmed that a plate-like matrix structure was formed in a solution obtained by dissolving curdlan in an aqueous sodium silicate solution and irradiating gamma rays (30 KGy) ([FIG. 3 (a)] [FIG. 3 ( b)]). 3 (a) and 3 (b), it was confirmed that sodium silicate crystals were not formed in the sample, and that the curdran polymer matrix was also not formed. When magnesium sulfate was added to the sample, spherical nanoparticles were formed from a matrix on a plate ([Fig. 3 (c)]). As the crystals of magnesium sulfate were not seen, magnesium sulfate was contained in the nanoparticle matrix, and the active ingredient was It can be seen that the included nanoparticle formulation was formed.

4 is an electron micrograph of the product according to the comparative example. Referring to FIG. 4, when magnesium sulfate was added to the reaction solution without irradiation, spherical nanoparticles were not formed properly and were formed in a form close to the polymer matrix (see FIG. 4 (a)), and curd When magnesium sulfate was added by irradiating gamma rays (30 KGy) to the lan solution, a typical polymer matrix phase was shown (see [FIG. 4 (b))), and it was confirmed that nanoparticles were not formed in either case.

The second solution may be dried to obtain a sustained release preparation.

By the above-described method, a sustained release preparation according to an embodiment of the present invention may be prepared. Hereinafter, the prepared sustained-release preparation will be described in more detail.

The sustained release preparation includes a porous carrier comprising a -Si-O- site and a biodegradable polymer; And an active ingredient supported by the porous carrier.

Referring back to FIG. 1, the -Si-O- portion of the porous carrier and the biodegradable polymer 110 are combined in the sustained release formulation 100, and the biodegradable polymer is the -Si-O- region and Covalently bound. The sustained release formulation 100 is composed of nanoparticles of 30 to 100 nm.

Curdlan may be used as the biodegradable polymer, and curdlan is well soluble in an alkali solution, and when an acidic substance is added, a matrix structure in the form of a network is formed. Since the network structure is opened when moisture is present and is closed again when it is dried, the sustained release preparation can be used as a moisture cognitive preparation that releases the active substance under moisture conditions.

5 is a TEM (Transmission Electron Microscopy) picture of the magnesium sulfate sustained-release preparation. Referring to [FIG. 5], it can be confirmed that 20-80 nm nanoparticles were formed through a TEM photograph ([FIG. 5 (b)]), and heavy particles displayed in bright colors through a TEM photograph with increased contrast. It can be confirmed that it is contained inside the nanoparticles ([FIG. 5 (a)]).

6 is a TEM photograph of the magnesium sulfate sustained-release preparation and the spectrum for the sustained-release preparation. Referring to [Fig. 6], as a result of confirming the spectrum ([Fig. 6 (b)]) for a portion of the nanoparticles ([Fig. 6 (a)] to 5 spectrums) that can be confirmed by a TEM photograph, magnesium sulfate Carbon atoms, oxygen atoms, magnesium atoms, silicon atoms, and sulfur atoms of the sustained-release preparation were all identified.

7 is a TEM photograph of the magnesium sulfate sustained-release preparation and an ELS (Electrophoretic Light Scattering) analysis photograph. Referring to FIG. 7, ELS analysis of magnesium sulfate sustained-release nanoparticles ([FIG. 7 (a)]), which can be confirmed by TEM photographs, results in carbon atoms ([FIG. 7 (b)]) and oxygen atoms ( [Figure 7 (c)]), sodium atom ([Figure 7 (d)]), magnesium atom ([Figure 7 (e)]), silicon atom ([Figure 7 (f)]), sulfur atom ([Figure It can be seen that 7 (g)]) is uniformly distributed inside the magnesium sulfate sustained-release nanoparticles.

Active ingredients that can be used in sustained-release preparations include fertilizers or pesticides. Fertilizers are used to supply nutrients to crops, and fertilizers that can be used as active ingredients include, but are not limited to, magnesium iron, manganese, molybdenum, zinc, copper, boron, calcium, sulfur, selenium, germanium, etc. It is not. Pesticides are used to control pests of agricultural crops, and include, but are not limited to, pesticidal active ingredients, bactericidal active ingredients, herbicidal active ingredients, and plant growth active ingredients.

Insecticidal active ingredients include acephate, isoxathion, imidacloprid, ethylthiodemeton, ethofenprox, cartap, and carbosulfan (carbosulfan), clofentezine, chloropyrifosmethyl, fenbutatin oxide, cycloprothrin, dimethylvinphos, dimethoate, sila Fluorene (silafluofen), diazinon, thiodicarb, thiocyclam, tebufenozide, nitenpyram, vamidothion, bifenthrin (bifenthrin), pyridaphenthion, pyridaben, pyrimiphosmethyl, fipronil, phenisobromolate, buprofezine, fura Furathiocarb, bensultap, benfura carb), formothion, malathon, monocrotophos, BPMC, CVMC, DEP, EPN, MEP, MIPC, MPP, MTMC, NAC, PAP, PHC, PMP, XMC, etc. Includes.

Antiseptic active ingredients include phosphite, acibenzolar-S-methyl, azoxystrobin, bitanol, isoprothiolane, isoprodion, already Iminoctadine triacetate, oxolinic acid, oxone-copper, kasugamycin, caproamid, captan, dicloezine, tia Thiabendazole, thifluzamide, tecloftalam, tricyclazole, validamycin, hydroxyisoxazole, pyroquilon, and fenari Fenarimol, ferimzone, phthalide, blasticidin, polyoxin, metasulfocarb, metalaxyl, metalaxyl-M, Metominostrobin, mepronil, ampicillin, CAN, IBP, DF-351, NNF-94 25, NNF-9850, and the like.

Herbicide active ingredients and plant growth regulators include azimsulfuron, atrazine, ametryn, inabenfide, imazosulfuron, uniconazole, and espro. Esprocarb, etobenzanid, oxadiazon, cafenstrole, quizalofop-ethyl, quinclorac, chlomethoxynil ), Cyclosulfamuron, dithiopyr, cinosulfuron, cyhalofop-butyl, simazine, dimethametryn, dimethifemetry Dimepiperate, cinmethylin, dymron, thenylchlor, triapenthenol, naproanilide, paclobutrazole, biphenox bifenox), piperophos, pyrazoxyfen, pyrazosulfuron-ethyl, Pyrazolate, pyributicarb, pyriminobac-methyl, butachlor, butamifos, pretilachlor, bromobu Bromobutide, bensulfuron-methyl, benzofenap, bentazon, benthiocarb, pentoxazone, benfuresate, mefena Mefenacet, molinate, jasmonic acid (JA), salicylic acid (SA), BABA, BTH, ACN, CNP, 2,4-D, MCPB and MCPB ethyl. In the present invention, the various active ingredients may be used alone, or a plurality of active materials may be used in combination.

On the other hand, by labeling the radioactive isotope in the active ingredient of the present invention, it can be utilized not only as a sustained release preparation, but also for various purposes for biological biological identification.

The present invention will be described in detail with the following examples, but the invention is not limited to the examples.

Example

Example  One: Magnesium sulfate  Sustained release preparations

After dissolving 1 to 3 g of sodium silicate in 180 to 200 mL of distilled water, 1 to 3 g of curdlan was slowly administered and dissolved while stirring the solution. Curdlan was completely dissolved and became a viscous solution (first solution). 5-15 mL of isopropanol was added to the first solution, and gamma rays were irradiated at 30 KGy. After the administration of 3-5 g of magnesium sulfate as an active ingredient to produce a second solution, the second solution was dried to obtain a magnesium sulfate sustained-release preparation.

Referring back to FIG. 3, it was confirmed that a matrix structure was formed on the plate in a solution irradiated with gamma rays (30 KGy) by dissolving curdlan in an aqueous sodium silicate solution ([FIG. 3 (a)] and [FIG. 3 (b)]. Referring to FIGS. 3 (a) and 3 (b), it was confirmed that sodium silicate crystals were not formed in the sample, and curd polymer matrix was also not formed. When magnesium sulfate was added to the sample, spherical nanoparticles were formed from a matrix on a plate (see FIG. 3 (c)). As the crystals of magnesium sulfate are not seen, it can be seen that the nanoparticle formulation containing the active ingredient was formed by containing magnesium sulfate into the nanoparticle matrix.

Example  2: Phosphite sustained-release preparation

After dissolving 2 g of sodium silicate in 190 mL of distilled water, 1 g of curdlan was slowly administered and dissolved while stirring the solution. Curdlan was completely dissolved and became a viscous solution (first solution). 10 mL of isopropanol was added to the first solution, and gamma rays were irradiated at 30 kgy. A slow release phosphite micro hydrating agent formulation was obtained by administering 2 g of phosphorous acid (H ³ PO ³ ) as an active ingredient.

9 is an SEM photograph of a sustained release phosphite micro hydrating agent formulation. 9, it can be seen that particles having a size of 1 to 3 μm were formed.

[Fig. 10] is a SEM photograph of a micro-hydrated agent formulation when 2 g of phosphorous acid is administered in Example 2. [Fig. 11 is a SEM photograph of a micro hydrating agent formulation when 4 g of phosphorous acid is administered in Example 2. 12 is a SEM photograph of a micro hydrating agent formulation when 8 g of phosphorous acid is administered in Example 2. Referring to [FIG. 10], [FIG. 11], and [FIG. 12], when the phosphorous acid dosage was 4 g / 200 mL or more, the formulation was not well formed.

13 is a spectrum showing the SEM photograph and EDX analysis results of the sustained-release phosphite micro-hydrate formulation according to Example 2. 13, EDX analysis results, it can be confirmed that the formulation contains phosphite.

14 is a TEM photograph of a sustained release phosphorous acid micro hydrating agent formulation. 14, it can be confirmed that the sustained-release preparation contains phosphite.

Comparative example

Comparative example  One

The same test as in Example 1 was repeated except that no irradiation was performed.

Comparative example  2

The same test as in Example 1 was repeated, except that magnesium sulfate was not administered.

Referring back to FIG. 4, when magnesium sulfate was added to the reaction solution without irradiation, spherical nanoparticles were not properly formed and were formed in a form close to the polymer matrix ([FIG. 4 (a)]), and curd When magnesium sulfate was added by irradiating gamma rays (30KGy) to the column solution, a typical polymer matrix phase was shown (see [FIG. 4 (b))), and it was confirmed that nanoparticles were not properly formed in either case.

Test example  One: Magnesium sulfate  Slow release test of the formulation

30 μg of the sustained-release preparation according to Example 1 was dissolved in 1 mL of distilled water to make a suspension and placed in a dialysis membrane. The dialysis membrane containing the suspended liquid was placed in 499 mL of distilled water, and samples were collected in 05 mL increments over time to analyze SO ₄ ^- ions by ion chromatography.

8 is a graph showing the release amount of SO ₄ ^- ions over time in the sustained release test. Referring to FIG. 8, about 27 to 28% of the total was released during the first hour, and gradually released, and more than 50% of the total was released after 11 hours.

Test example  2: Slow release test of phosphorous acid preparation

30 μg of the sustained-release preparation according to Example 2 was dissolved in 1 mL of distilled water to make a suspension and placed in a dialysis membrane. The dialysis membrane containing the suspension was put in 499 mL of distilled water, and samples were collected by 05 mL over time and analyzed by ion chromatography.

15 is a graph showing the sustained-release test results of the formulation according to Example 2. Referring to FIG. 15, in the first hour, about 5% of the total was released, and gradually released, and after 9 hours, a total of 20% or more was released.

The release of the agrochemical active ingredient can be effectively controlled by using the sustained release preparation of the present invention made as described above. Since it is possible to maintain the effect of the active ingredient of the pesticide for a long time by spraying the pesticide at an appropriate concentration a suitable number of times, it is not only eco-friendly, but also can significantly reduce labor and cost.

In addition, the sustained-release preparation of the present invention is made of a complex structure, so it has excellent durability and exhibits particularly strong properties against external environmental factors. In the preparation of the sustained-release preparation of the present invention, the manufacturing process is simply performed at room temperature, as well as using eco-friendly raw materials such as biodegradable polymers, and can significantly reduce manufacturing costs compared to other sustained-release formulations.

<Mercury Antifouling  Paint composition>

The environmentally friendly water-based antifouling coating composition using wood tar according to the present invention comprises at least one of illite or zeolite, wood tar, silicate-based resin, water and synthetic resin.

Here, wood tar (wood tar) refers to a liquid product that is produced as a by-product when making charcoal by drying wood, and the wood tar contains grass acid, absorbing and decomposing harmful substances such as formaldehyde and heavy metals. Not only does it have an effect, but also has antifouling effects such as antibacterial and insect repellent. In addition, as a vegetable extract that is not mineral, it does not contain carcinogens and has an environmentally friendly advantage.

The neck tar is preferably made of coniferous tar 10% by weight to 30% by weight, hardwood tar 30% by weight to 50% by weight, and lacquer tar 40% by weight to 60% by weight. This is because coniferous, broad-leaved, and sumac trees have not only different content of formic acid, but also have different absorption and decomposition effects of harmful substances and antifouling effects such as antibacterial and insect repellent. It has been shown to be optimal for maximizing the above effects.

Further, at least one of illite or zeolite acts as a filler, and it is possible to add illite or zeolite, respectively, but it is more preferable to mix and add them. This not only increases the deodorizing effect of the composition of the present invention, but also serves to increase the thermal conductivity and radiate far infrared rays.

The siliceous resin may be any resin containing silicic acid, which inhibits the generation of static electricity on the surface, and serves to prevent foreign matter from adhering.

In addition, the synthetic resin is preferably at least one of acrylic, emulsion, urethane, alkyd, amino alkyd, and vinyl, and more preferably, it is effective to use an acrylic resin. The synthetic resins listed above are resins optimized to improve the durability of the antifouling coating by effectively mixing with water, coating the aqueous antifouling coating composition evenly, as a result of several experiments.

Here, the content of the eco-friendly water-based antifouling coating composition using wood tar, 80 to 120 parts by weight of at least one of the illite or zeolite, 100 to parts by weight of the synthetic resin, the neck tar 5 ~ 20 parts by weight, the siliceous resin is 10 to 50 parts by weight, the water is preferably 10 to 40 parts by weight, more preferably at least one of the illite (illite) or zeolite (zeolite) 90 to 100 parts by weight Part, it is effective that the neck tar is 8 to 12 parts by weight, the siliceous resin is 25 to 35 parts by weight, and the water is 20 to 30 parts by weight.

When at least one of the illite or zeolite is less than 80 parts by weight, the deodorizing effect is insignificant, and when it exceeds 120 parts by weight, the thermal conductivity becomes excessively high, and there is a problem of deteriorating the durability of the antifouling coating.

In addition, when the wood tar is less than 5 parts by weight, the content of forage acid is too small, and there is a problem that the decomposition rate of harmful substances, disease prevention effects such as atopy, and antifouling performance such as antibacterial and insecticidal are significantly reduced, and exceeds 20 parts by weight When doing so, not only the economic efficiency is lowered due to the excessive content, but rather, there is a problem that odor occurs.

When the silicic acid-based resin is less than 10 parts by weight, the surface static electricity suppression effect is remarkably lowered, and thus there is a problem in that the foreign substance removal function is weakened. When it exceeds 50 parts by weight, it is not only economical, but also prevents mixing between the antifouling coating compositions and prevents antifouling coating. There is a problem to reduce the durability of.

In addition, when the water is less than 10 parts by weight, the components cannot be effectively mixed, and thus there is a problem that the coating workability is deteriorated. When it exceeds 50 parts by weight, the components are diluted excessively, and the antifouling coating has sufficient antifouling performance. There is a difficult problem to form.

The eco-friendly water-based antifouling coating composition using the wood tar, it is preferable to further include at least one of a thickener or an additive. These are additionally added to increase properties such as ease of application and durability of the antifouling coating composition.

The thickener is in the form of an aerosol, and comprises silica, and the particle size is preferably 1 to 5 μm, and more preferably, the particle size is 2 to 3 μm. Here, the thickener has an aerosol form, is made of silica, and by optimizing the size of the particles, the viscosity is appropriately increased to form an optimum thickness for easy antifouling coating, and serves to improve the durability of the coating.

The additive is preferably at least one of an antifoaming agent, leveling agent, antioxidant, stabilizer, or sunscreen. These are added to improve the durability and application workability of the antifouling coating. These are added to improve the durability and application workability of the antifouling coating. Here, as an additive, an anti-settling agent and a dispersing agent may be further added.

The content is preferably 100 parts by weight of the synthetic resin, the thickener is 2 to 10 parts by weight, the additive is preferably 5 to 20 parts by weight, more preferably the thickener is 5 to 8 parts by weight, the additive is 10 to It is effective to be 15 parts by weight. When it is less than the optimum content, there is a problem that it is difficult to exert the performance as a thickener and an additive, and when it exceeds the optimum content, there is a problem that not only the economic efficiency is lowered, but also the antifouling performance is lowered.

The eco-friendly water-based antifouling coating composition using wood tar according to the present invention made as described above is prepared by mixing synthetic resin and water in an optimal ratio of wood tar, which is waste, compared to conventional antifouling paint, for building and ship interior. Not only is it excellent in antifouling performance, it also has eco-friendly advantages.

In addition, unlike conventional, water is used as a diluent instead of a volatile solvent, and is a non-toxic antifouling coating composition, which not only prevents human diseases such as atopy or allergies, but also has antifouling performance due to the herb acid contained in the wood tar. Sustainability increases a lot, and it has the advantage of excellent antibacterial, insect repellent, deodorant, deodorizing, antibacterial and anti-condensation performance.

In addition, by recycling the wood tar, which has been disposed of and the waste disposal cost is increasing, the value of resource utilization is high and economic efficiency is excellent.

(Applied to pepper Example )

In the present invention, the results of applying the above-described multifunctional mulching film to pepper cultivation are as follows.

Pepper cultivation was usually sown at the time of planting the pepper, and in this case, the example covered the pepper with a multi-functional mulching film according to the present invention consisting of the components as shown in [Table 2] below, and the comparative example was a sustained release preparation and aqueous antifouling. The pepper was covered with a normal mulching film that did not contain a coating composition.

ingredient

content
Synthetic resin

98% by weight
Sustained release preparations

1% by weight
Water-based antifouling paint composition

1% by weight

As a result, it can be seen that the peppers grown as a comparative example as shown in [Fig. 16] are yellow or dried, and the peppers grown as examples are rotten or dried peppers as shown in [Fig. 17] and [Fig. 18]. You can see that it is ripe in red with little fall.

Claims (14)

Synthetic resin 96 ~ 99.8% by weight
Sustained-release preparation 0.1 ~ 2% by weight
Water-based antifouling coating composition 0.1 to 2% by weight
Multifunctional mulching film, characterized in that made.
In claim 1,
The synthetic resin,
A multifunctional mulching film comprising at least one of PE (polyethylene), polypropylene, and polyester.
In claim 1,
The sustained release formulation,
A porous carrier comprising a -Si-O- site formed by using sodium silicate as a precursor and a biodegradable polymer; And
A multi-functional mulching film comprising an active ingredient supported by the porous carrier.
In claim 3,
The biodegradable polymer,
Multifunctional mulching film characterized in that it is covalently bonded to the -Si-O- site.
In claim 4,
The biodegradable polymer,
With curdlan, cellulose, pullulan, gellan, zooglan, levan, xantan gum, starch and chitosan Multifunctional mulching film comprising at least one selected from the group consisting of.
In claim 3,
The active ingredient,
Multifunctional mulching film comprising a fertilizer component or a pesticide component.
In claim 6,
The fertilizer component,
A multifunctional mulching film comprising at least one selected from the group consisting of magnesium, iron, manganese, molybdenum, zinc, copper, boron, calcium, sulfur, selenium, and germanium.
In claim 6,
The pesticide component,
A multi-functional mulching film comprising at least one component selected from the group consisting of pesticidal active ingredients, bactericidal active ingredients, herbicidal active ingredients and plant growth regulators.
In claim 1,
The sustained release formulation,
A multi-functional mulching film characterized by comprising 30 to 100 nm of nanoparticles.
In claim 1,
The sustained release formulation,
Multifunctional mulching film, characterized in that it is a water-recognition type preparation.
In any one of claims 1 to 10,
The aqueous antifouling coating composition,
At least one of illite or zeolite, wood tar, siliceous resin, thickener, water and synthetic resin, and the neck tar, coniferous tar, 10 wt% to 30 wt%, broad-leaved tar 30 It is composed of 50% by weight to 50% by weight, 40% by weight to 60% by weight of lacquer, and the thickener is in the form of an aerosol, and comprises silica, and the particle size is 1 to 5㎛,
With respect to 100 parts by weight of the synthetic resin, at least one of the illite or zeolite is 80 to 120 parts by weight, the neck tar is 5 to 20 parts by weight, and the siliceous resin is 10 to 50 parts by weight, The thickener is 2 to 10 parts by weight, the water is a multifunctional mulching film, characterized in that 10 to 40 parts by weight.
In claim 11,
With respect to 100 parts by weight of the synthetic resin, the additive contains 5 to 20 weight,
The additive,
With respect to 100 parts by weight of the synthetic resin used in the water-based antifouling coating composition, at least one of the illite or zeolite is 80 to 120 parts by weight, the neck tar is 5 to 20 parts by weight, and the siliceous resin is Multifunctional mulching film, characterized in that 10 to 50 parts by weight, the thickener is 2 to 10 parts by weight, and the water is 10 to 40 parts by weight.
In claim 11,
The synthetic resin used in the aqueous antifouling coating composition,
A sheet for pesticide supply, characterized in that it is at least one of acrylic, emulsion, epoxy, urethane, alkyd, amino alkyd, and vinyl.
In claim 12,
The additive,
Multifunctional mulching film, characterized in that it is at least one of an antifoaming agent, leveling agent, antioxidant, stabilizer, or sunscreen.

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