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  • 专利说明
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    • 专利摘要:

    公开号:BE1020900A5
    申请号:E201400055
    申请日:2014-01-31
    公开日:2014-08-05
    发明作者:Francis Claes
    申请人:Globachem Nv；
    IPC主号:
    专利说明:

    SEED COATING WITH COPOLY LAKE
    TECHNICAL FIELD OF THE INVENTION
    The actual invention offers coated seeds with an improved safety profile, with reduced degrees of dust formation and a reduced risk of dust explosions. In addition, the current invention offers compositions, their use and the seed coating method.
    BACKGROUND OF THE INVENTION
    Seeds are coated for their user-friendliness, separation, accurate placement and processing of favorable chemicals and microbials (bacteria, viruses, fungi). However, the most important problem during and after the coating of seeds is the development of dust.
    The dust flow from pesticide applications can expose humans, animals and the environment to pesticide residues, which can harm health and the environment. In the spring of 2008 in Germany, for example, 11,500 bees colonies in the upper Rhine valley exhibited insecticidal poisoning caused by the wear of active coated substances
    corn seeds (Pistorius et al. 2009, Julius-Kühn-Archiv 423: 118-126). The 2010/21 / EU directive
    of 12 March 2010 stipulates that from 1 November 2010 the seed treatments containing clothiadine, imidaclopride, thiamethoxam and fipronil may only be used in seed treatment plants equipped with the very best techniques to ensure that the release of dust during application of the seed, storage and transport to an absolute minimum.
    In addition to the dust flow, the risk of dust explosions during the coating of the seeds and during the transport and storage of the coated seeds is a concern. Indeed, dust generated from coatings represents a serious risk of dust explosions that endanger staff and infrastructure. Special dust collectors and explosion ventilation may be necessary during coating, transportation and storage.
    A number of seed coatings that reduce dust formation have already been described.
    For example, US6058649 identifies a polyvinyl acetate homopolymer as a preferred substance for coating seeds with selenium. The polyvinyl acetate homopolymer coating apparently has a reduced dust formation compared to vinyl acetate ethylene copolymer coatings. EP1078563 tests various seed coatings and their dust formation properties. It is stated that vinyl acetate-butyl acrylate and vinyl acetate-ethylene copolymers are seen as the preferred components for the coatings.
    IN 141 CHE 2010 A1 describes complex seed coatings that contain at least binder, a plasticizer, a moisturizer, an emulsifier and a stabilizer. In the examples, in addition, an anti-foaming agent, an anti-settling agent, colorants and a solvent is added to the coating solution.
    CS 261 107 B1 describes, inter alia. a coating with Disapol CF 601 (dibutyl maleate vinyl acetate copolymer), modified starch, polyphosphate, glycerin, butyl glycol acetate and citrate. Despite these improvements, there is still a need for coatings with an even lower dust formation. Furthermore, it was found that the substance formed from this seed coating had a very small particle size and, therefore, contained an inherent risk with regard to dust explosions. There is therefore a demand for a seed coating with a better safety profile, for example with limited dust-forming properties and a low risk of dust explosions.
    SUMMARY OF THE INVENTION
    The current invention provides a seed coated with a composition containing a copolymer. This copolymer contains vinyl acetate and dibutyl maleate. The coated seed may further contain one or more additives. In a particular embodiment, the above-mentioned additives may be selected from a list consisting of a seed and / or plant-protecting substance, a colorant, a filling substance and a fertilizer. In a further embodiment, one or more additives can be used in the said composition. In another embodiment, said copolymer may be present in an amount between 0.005 and 0.5% (w / w) of said seed coating.
    The present invention also provides a composition containing a seed and / or plant protecting agent and a copolymer containing vinyl acetate and dibutyl maleate. The invention furthermore offers the use of such a composition for coating seeds.
    In addition, the current invention provides a seed coating method, comprising: a) obtaining a composition containing a copolymer with vinyl acetate and dibutyl maleate; b) applying said composition to a seed; and c) allowing said composition to dry on the determined seed.
    The method may further comprise adding one or more additives, such as a seed and / or plant protection substance, a colorant, a filling substance and / or a fertilizer.
    In another particular embodiment, between 0.05 and 5 g of said copolymer per kilo of seed is used in the methods of the invention.
    The current invention also relates to the use of a coated seed of the invention for the growth of a plant.
    BRIEF DESCRIPTION OF THE INVENTION
    It was surprisingly found that coatings containing a copolymer with vinyl acetate and dibutyl maleate solve the problems associated with prior coatings. As a result and as written above, the present invention provides a seed coated with a composition containing a copolymer with vinyl acetate and dibutyl maleate. The inventors of the current application identified that such coated seeds release less dust than the prior art coating technique. The coating methods of the current invention are compatible with hard seeds (such as grains, corn, rapeseed) as well as with soft, flexible seeds (such as grass seeds). Previous coating methods do not efficiently reduce dust formation in the coatings of soft, flexible seeds. When flexible seeds are bent during enforcement, the coating will often break and generate dust. However, it has been found that flexible seeds coated with the method of the invention tolerate more stress before the coating is damaged and breaks loose from the seed. Apparently, the coatings of the current invention are smoother than previous coatings and do not break.
    Additionally, the substance released from coated seeds of the invention poses much less risk with regard to dust explosions compared to the substance released from coated seeds of the foregoing techniques. Although the risk of dust explosions also depends on the dust material, an ignitable dust is generally defined as consisting of particles that are smaller than 420 micrometers in diameter. Finer dust represents a much greater threat than rough particles because of the large total surface area of all the particles.
    Furthermore, coating with a composition consisting of a copolymer with vinyl acetate and dibutyl maleate requires less coating composition than prior coating techniques and this with a complete coating of the seeds. It is therefore possible to coat the seeds without a significant impact on the weight or volume of the seed. Accordingly, the coated seeds of the present invention are fully compatible with the standard seed treatment equipment.
    Despite the fact that only small amounts of coating are necessary, it has been found that the coating offers excellent properties with regard to germination. While the amount of prior coatings added to the seed is limited, large amounts of the present invention can be used without significantly affecting germination.
    In a particular embodiment, the seeds are coated with a composition containing a copolymer in which at least 75% of said copolymer consists of vinyl acetate and dibutyl maleate. More specifically, at least 85%, and preferably at least 90%, even more preferably at least 95% of the copolymer consists of vinyl acetate and dibutyl maleate. In another particular embodiment, said copolymer essentially consists of vinyl acetate and dibutyl maleate, more particularly the polymer consists of at least 99% vinyl acetate and dibutyl maleate. In yet another embodiment, the present invention provides a seed coated with a composition containing vinyl acetate-dibutyl maleate copolymer. Although the solids content of the copolymer may vary, the percent of solids in the copolymer is preferably in the range from about ca.
    40 to about 70 percent weight, even more preferred is from about 50 to about 60 percent of the weight.
    The copolymer of the present invention was found to have a low minimum film-forming temperature (MFFT). It is an additional advantage that the coating of the invention forms a film around the seeds, even if the seeds are not dried after coating. Therefore, in a particular embodiment, the copolymer has a minimum film-forming temperature below 15 ° C, more particularly below 10 ° C. In a further embodiment, this copolymer has a minimum film-forming temperature between approximately 0 ° C and approximately 15 ° C, more particularly between 6 ° C and 10 ° C. Furthermore, because of the strong binding properties, very low amounts of the copolymer are necessary. In a particular embodiment, the pH of the copolymer is below 7, more particularly below 6, actually between 3.5 and 5.5. Therefore, it has been found that the copolymer is compatible with most of the currently used pesticides, which are degradable in the essential environments. A further advantage is that the coating is resistant to UV rays. Therefore, the coating of the current invention protects the additives that are added in or below the coating.
    In a particular embodiment, the coated seed of the invention contains one or more additives. The said one or more additives can be added to the coating for coating the seed. In a further embodiment, one or more additives can be used in the said composition. Any suitable additive can be used In a particular embodiment, the above-mentioned additives can be selected from a list consisting of a seed and / or plant protection substance, a colorant, a filling substance and a fertilizer.
    Seed and / or plant protection substances are: pesticides, such as fungicides, nematocides, rodenticides, bird repellant, herbicides, spleenicides and insecticides. Seed and / or plant protection substances can be derived from natural materials such as biopesticides, or can be synthetic such as organophosphate pesticides, carbamate pesticides, oganochlorine insecticides and pyretroid pesticides. Preferred pesticides contain neonicotinoids and phenylpyrazoles, such as clothianidine, thiamethoxam, fiploprid and imipro.
    For example, the coloring of seeds is often used to differentiate between the different types of seeds, to assist the planter in seeing the seeds and their distribution and to attract seed-eating animals such as birds less. Therefore, in a particular embodiment, the coated composition contains a dye.
    Filling substances are added regularly in seed coatings to increase the weight and size of the coated seeds. This allows better maintenance of the coated seeds, for example in seed spreading devices. It was found that a copolymer containing vinyl acetate and dibutyl maleate can bind large amounts of filler substances in seeds, thereby preventing less cleavage of the coating materials. Suitable filling substances are mineral fillers, such as particles of clay, silicon dioxide, quartz, titanium dioxide, perlite, calcite or fibrous materials (e.g. wood fibers or mineral wool fibers).
    Seed coatings of the present invention can contain fertilizer substances that aid in the germination and growth of the plant. Fertilizers, according to the invention, contain growth regulators and nutrients. The fertilizers can be organic or inorganic of natural or synthetic origin.
    Multiple different types of additives in the coated seeds of the present invention are combined.
    Any type of seed is used in this current invention, e.g. corn or wheat seeds. One of the advantages of the present invention is that very low amounts of the copolymer can be used to coat the seeds. Lower amounts of copolymer are necessary for coating seeds compared to the earlier techniques. For example, the styrene-acrylate copolymer coating binder (commercialized with the trade name Peridiam and Sepiret Rouge) is currently used at 3 to 4 liters per 1000 kg of seed. It was surprisingly found that 0.4 to 0.6 liters of the copolymer of the present invention is sufficient to efficiently coat 1000 kg of seeds. Therefore, in another embodiment, said copolymer is present in an amount between 0.005 and 0.5% (w / w) of the non-coated seed (dry weight). In another embodiment, the copolymer is present in an amount between 0.01 and 0.2% (w / w), determined between 0.01 and 0.1% (w / w), more particularly between 0.01 and 0.05% (w / w)
    When pelleting seeds by adding the copolymer of the invention together with filling substances, more copolymer of the invention may be added. The trained person knows how to determine the optimum dosage of the coating composition, depending on the amount and type of filling substance. As a guideline, it was found that aqueous solutions containing between 40 and 60% (w / w), in particular about 50% of the copolymer of the invention, can replace earlier binders in the pilling process. While previous coating techniques tended to suffer from pre-coated and dried seeds, it was found that the coatings of the present invention adhere very well to both the naked and the coated seeds. For example, multiple layers of coating of the invention can be added one after the other, even if the coatings were dried between the application of the different layers. The coatings are also extremely suitable for coating seeds that were previously coated with a different coating. Example: the current coating can be applied to seeds that have been pelleted or coated according to the previous coating techniques. The coating of the present invention can also be applied to seed for coating with other types of coatings. In a particular embodiment, the seeds of the present invention may further contain one or more additional coating layers in the coating composition consisting of a copolymer with vinyl acetate and dibutyl maleate. These additional layers can be applied before or after applying the coating composition with a copolymer with vinyl acetate and dibutyl maleate. In yet other embodiments, these multi-layer coated seeds may also contain additional layers with a copolymer containing vinyl acetate and dibutyl maleate.
    In a particular embodiment, the present invention also provides a composition containing a seed and / or plant protecting substance and a copolymer that has vinyl, acetate and dibutyl maleate. In yet another embodiment, the present invention also provides a composition containing a seed and / or plant protecting substance and a copolymer that has vinyl, acetate and dibutyl maleate. In yet another embodiment, the present invention also provides a coating composition that contains a seed and / or plant protection agent and a copolymer that has vinyl acetate and dibutyl maleate. The invention furthermore offers the use of such a composition for coating seeds.
    The present invention also provides a seed coating method, comprising: a) obtaining a composition containing a copolymer containing vinyl acetate and dibutyl maleate; b) applying said composition to a seed; c) allowing the said composition to dry on the particular seed.
    In a particular embodiment, the said method also includes adding one or more additives. In a further embodiment, one or additives may be used in said composition. For example, a coating composition can be obtained that contains water, pesticides, a dye and the copolymer. After mixing the ingredients, such a composition can be used by using 4 to 5 ml per kg of seed, where for example 0.6 ml consists of the copolymer. Therefore, in a particular embodiment, between 0.05 and 5 ml of said copolymer is added per kg of seed, more particularly between 0.1 and 2 ml and even more precisely between 0.2 and 1 ml. In another embodiment, between 0.05 and 2 ml of the coating composition is added per kg of seed, more particularly between 0.1 and 1.5 ml and even more precisely between 0.2 and 1 ml.
    In a particular embodiment, the methods of the present invention add the coating of the invention to a pre-coated seed. In a particular embodiment, the methods of the invention include the addition of additional coating layers. These additional coating layers optionally contain a copolymer containing vinyl acetate and dibutyl maleate; EXAMPLES Example 1
    Corn and wheat seeds were coated with a known, state-of-the-art technique or with a coating according to the invention, using different amounts of coating. The known coating technique consisted of styrene-acrylate copolymer used with 3 to 4 ml of copolymer per kg of seed (i.e. representative for the commercial coating Peridiam EV25001 and Sepiret 9290FR Rouge that received regulatory approval for applications with 3 to 4 ml per kg of seed). The coating of the invention consisted of vinyl acetate-dibutyl maleate copolymer (sold as 2203 by EOC Group) used with only 0.4 to 0.5 ml per kg of seed. The specifications of vinyl acetate-dibutyl maleate copolymer are as follows:
    Viscosity (Brookfield RV 4/20): 3770 - 9000 pH: 3.5 - 5.5% solids: 53 - 55%
    Residual monomers: 0 - 0.2%
    Dust released from blinded samples was measured in an independent institute (Institute for Agricultural and Fisheries Research - ILVO, Belgium) according to the Heubach method.
    Table 1: Heubach test results (Corn and wheat)
    As visible in Table 1, a higher amount of copolymer coating leads to a reduction in dust formation. Despite the much lower amount of copolymer used for the coating of the invention, much less dust (40-80% less) is released from the coating of the invention compared to the commercially known coating technique. By increasing the amount of the copolymer of the invention applied to the seeds, the dust-free environment can be reduced even further.
    Example 2
    Wheat seeds were coated with a state-of-the-art coating technique and with the coating according to the invention. The known coating technique consisted of vinyl acetate-butyl acrylate copolymer (as in EP1078563). The coating of the invention consisted of vinyl acetate-dibutyl maleate copolymer as in Example 1. Both copolymers were used with 0.6 ml per kg of seed. The release of dust from the blinded samples was measured in an independent institute (Satec Seedcoating GmbH in Elmshorn, Germany) with the Satec Dust Monitor. The dust monitor can measure a certain dust load per volume of air, this simulates the real effects on the field when the treated seeds are sown.
    Table 2: Satec Dust Monitor results (wheat)
    The results of Table 2 show that the coating of the invention releases about 40% less dust than the prior coating technique of EP1078563. The lower release of dust was confirmed by the Heubach method.
    Example 3
    Corn seeds were coated and dust was measured with the Satec Dust Monitor as in Example 2. The coating of the invention released about 5% less dust than the previous coating technique of EP1078563. In addition, it was observed that very small dust particles were released in the earlier coating technique, which had an average size of 6 to 10 microns, while the substance released by the coated seeds of the invention consisted of small sheets with a particle size of about 5 millimeters, i.e. far above the ignitable size of dust particles of 420 microns. The coating of the invention thus has a better safety profile because less dust is released and sheets that are formed carry a much lower risk of dust explosions.
    权利要求:
    Claims (14)
    [1]
    A seed coated with a composition comprising a copolymer containing vinyl acetate and dibutyl maleate; wherein said copolymer is present in an amount between 0.005 and 0.5 weight percent of the uncoated seed.
    [2]
    2. The coated seed according to claim 1 which further contains one or more additives.
    [3]
    The coated seed according to claim 2, wherein said one or more additives are selected from the list consisting of a seed and / or plant protection substance, a colorant, a filling substance and a fertilizer.
    [4]
    The coated seed according to claim 3, wherein the seed and / or plant-protecting substance is a pesticide.
    [5]
    The coated seed according to any of claims 2 to 4, wherein one or more additives are added to the said composition.
    [6]
    6. The coated seed of any of the previous claims that further contains one or more additional layers.
    [7]
    The coated seed according to claim 2 or 3, wherein the coating consists of said copolymer and one or more additives.
    [8]
    A seed coating method comprising: a) obtaining a composition containing a copolymer containing vinyl acetate and dibutyl maleate; b) applying said composition to a seed; and c) allowing said composition to dry on said seed such that said copolymer is present in an amount between 0.005 and 0.5 weight percent of the uncoated seed.
    [9]
    9. The method of claim 8, further comprising adding one or more additives.
    [10]
    The method of claim 9, wherein said one or more additives are selected from a list consisting of a seed and / or plant protection substance, a colorant, a filling substance, and a fertilizer.
    [11]
    11. The method of any of claims 9 or 10, wherein one or more additives are included through to said composition.
    [12]
    The method of any of claims 8 to 11, wherein between 0.05 and 5 ml of said copolymer is added per kg of seed.
    [13]
    The method of any of claims 9 or 10, wherein said composition comprises said copolymer and one or more additives.
    [14]
    Use of the coated seed of any of claims 1 to 7 for growing a plant.
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    同族专利:
    公开号 | 公开日
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3319377A|1964-08-27|1967-05-16|Velsicol Chemical Corp|Composition and method for the treatment of soil|
    DE2702096A1|1976-01-19|1977-07-28|Celanese Corp|METHOD FOR IMPROVING THE FUNGICIDAL EFFECT OF DITHIOCARBAMATE SALT|
    CS261107B1|1986-11-26|1989-01-12|Jaromir Pech|Binding agent for preparation or preparation mixtures anchoring with efficient substances content used during sowing seeds pickling on grain surface|
    EP1078563A1|1999-08-25|2001-02-28|National Starch and Chemical Investment Holding Corporation|Seed coating compositions for low temperature applications|
    WO2001045513A1|1999-12-21|2001-06-28|Dsm N.V.|Preserving active fungicide in an aqueous solution|
    US20060047069A1|2004-09-01|2006-03-02|Celanese Emulsions Gmbh|Polymer dispersions having improved polyene-fungicide tolerance, their production and use for food coating|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    EP13166269|2013-05-02|
    EP131662694|2013-05-02|
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