NL2036885B1 - method for coating seeds and/or fertilizers. - Google Patents
method for coating seeds and/or fertilizers.Info
- Publication number
- NL2036885B1 NL2036885B1 NL2036885A NL2036885A NL2036885B1 NL 2036885 B1 NL2036885 B1 NL 2036885B1 NL 2036885 A NL2036885 A NL 2036885A NL 2036885 A NL2036885 A NL 2036885A NL 2036885 B1 NL2036885 B1 NL 2036885B1
- Authority
- NL
- Netherlands
- Prior art keywords
- seeds
- coating formulation
- fertilizers
- cellulose
- coating
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C1/00—Apparatus, or methods of use thereof, for testing or treating seed, roots, or the like, prior to sowing or planting
- A01C1/06—Coating or dressing seed
-
- 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
- C05G5/37—Layered or coated, e.g. dust-preventing coatings layered or coated with a polymer
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Pest Control & Pesticides (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Fertilizers (AREA)
- Pretreatment Of Seeds And Plants (AREA)
Abstract
The present invention relates to a method for coating seeds and/or fertilizers, wherein the seeds and/or fertilizers are brought into contact with the coating formulation for obtaining coated seeds and/or coated fertilizers. The present invention also relates to seeds and/or fertilizers provided with a coating formulation on its outer surface as well as to agricultural area provided with such coated seeds and/or coated fertilizers.
Description
Title: method for coating seeds and/or fertilizers.
The present invention relates to a method for coating seeds and/or fertilizers.
The present invention also relates to seeds and/or fertilizers provided with a coating formulation on its outer surface as well as to agricultural area provided with such coated seeds and/or coated fertilizers.
Methods for coating seeds are well known in the art. For example, US 2022/159953 discloses a method of protecting seeds from oxidants and microorganisms prior to planting the seeds, the process comprising coating the seeds with an antioxidant effective amount and an antimicrobial effective amount of a composition comprising at least one compound selected from the group consisting of octyl gallate, nonyl gallate, decyl gallate, and mixtures thereof, in an optional solvent and/or optional carrier prior to planting the seeds.
US 2020/255355 relates to a method of making a fertilizer-microbial composition, comprising (i) contacting a core particle comprising at least one fertilizer nutrient selected from an N-P-K fertilizer with a mixture comprising a polymer, pre- polymer, or oligomer; and polymerizing the polymer, pre-polymer, or oligomer ic form a polymer layer, (ii) contacting the core particle comprising at least one fertilizer nutrient with wax to form a wax layer; and/or (iii) contacting the core particle comprising at least one fertilizer nutrient with one or more species of microbes to form a layer of microbes.
EP 0 934 918 discloses a particle-state composition for agriculture and gardening wherein a coating material A or a mixture composed of the coating material
A and a coating material B is coated on a particle-state fertilizer, and the coating material A is a biodegradable cellulose ester composition, and the coating material B is at least one selected from the group consisting of an olefin polymer, a copolymer containing an olefin, a polyvinylidene chloride, a copolymer containing vinylidene chloride, a diene-based polymer, waxes, a petroleum resin, a natural resin, a cellulose acetate resin, a polycaprolactone, and oils and fats and a modified product therefrom.
US 2020/369909 discloses a granular composition for agricultural use comprising a plurality of granulates having a biodegradable coating applied over the granulates, wherein the granulates comprise a material selected from the group consisting of seeds, fertilizers, and pesticides, and wherein the biodegradable coating comprises from about 5 to about 75 weight percent polylactic acid and from about 25 to about 95 weight percent polyhydroxyalkanoates.
CN 113816 793 discloses an organic controllable release compound fertilizer structure comprising a base fertilizer unit, wherein the base fertilizer unit is located at the top layer of the fertilizer structure, and a growth fertilizer unit and a vegetable and fruit fertilizer unit are sequentially arranged at the lower layer of the base fertilizer unit, a first coating layer, the first coating layer being correspondingly sleeved on the outer sides of the growth fertilizer unit and the vegetable and fruit fertilizer unit, and a second coating layer, the second coating layer being sleeved on the outer bottom of the first coating layer, and the top surface of the second coating layer,
US 2020/339784 discloses a sustained-release fertilizer comprising a carbohydrate-based polymeric material formed from at least a first carbohydrate and a plasticizer, and another polymeric material, wherein the carbohydrate-based polymeric material is intimately dispersed within the other polymeric material and exhibits an average particle size of less than 2 ym per particle.
WO2016058096 discloses a biodegradable bioactive film comprising about 60% to about 75% (m/m) polyhydroxyalkanoate, a bioactive compound or organism, a nucleating agent, a plasticizer, a filler and an impact modifier or fiber.
Seeds may be coated with a thin film of polymers, such as polyethylene or polyvinyl alcohol, which provides protection against environmental factors, diseases, and pests. These coatings can also improve seed handling characteristics. Coatings may also serve specific purposes to enhance seed performance, protect against various stresses, and promote optimal germination and early growth, enhance handling, reduce dust-off during planting, and improve seed flow in planting equipment.
Microplastics are small pieces of plastics, usually smaller than 5mm. They are persistent, very mobile, and hard to remove from nature. A growing volume of microplastics is found in the environment, including in the sea and in soil, as well as in food and in drinking water.
Once in the environment, microplastics do not biodegrade and tend to accumulate - unless they are specifically designed to biodegrade in the open environment. Biodegradability is a complex phenomenon, especially in the marine environment. There are increasing concerns about the presence of microplastics in different environment compartments (such as water), their impact on the environment and biodiversity and potentially human health.
In 2023, the European Commission adopted a REACH restriction on microplastics intentionally added to products and a proposal for a Regulation on preventing plastic pellet losses to the environment. These actions will directly contribute to reaching the 30% reduction target for microplastic releases set out in the
Zero Pollution Action Plan. The EU aims to reduce microplastic releases by 30% by 2030 by reducing plastic pollution {as these degrade into microplastics), restricting the use of intentionally added microplastics to products, and reducing unintentional microplastic releases
The seeds and/or fertilizers as mentioned above are used in the open environment. In view of the new legislation it ís therefore desirable that the coating formulation to be used for coating seeds and/or fertilizers cannot be qualified as a coating formulation containing microplastics.
The object of the present invention is to develop a method for coating seeds and/or fertilizers wherein the coating formulation used in that method meets the requirements of ready biodegradability, especially REACH microplastic regulation (EU) 2023/2044 of September 2023.
The present invention thus relates to a method for coating seeds and/or fertilizers, comprising the following steps: - providing seeds and/or fertilizers, - providing a coating formulation, - contacting the seeds and/or fertilizers with the coating formulation thereby obtaining coated seeds and/or coated fertilizers, wherein the coating formulation comprises one or more components chosen from the group of polylactic acid, polyhydroxyalkanoates, cellulose butyrate, cellulose acetate, cellulose diacetate, cellulose triacetate, cellulose acetate butyrate, triacetin, mixtures of polylactic acid, polybutylene adipate terephthalate and thermoplastic starch, or a combination thereof.
The present inventor found that the above identified object can be achieved by the group of components as mentioned above.
Examples of polyhydroxyalkanoates include 3-hydroxyvaleric acid, hydroxy alkanoic acid, 3-hydroxybutyric acid, 3-hydroxydecanoic acid, 3-hydroxyoctanoate, 4- hydroxybutyric acid, gamma-hydroxybutyric acid, 3-hydroxybutyrate, 3- hydroxyvalerate, poly-3hydroxybutyrate-co-3hydroxyvalerate-co-3hydroxyhexanoate, poly(3-hydroxybutyrate-co-3-hydroxyvalerate-co-2,3-dihydroxybutyrate), poly- 3hydroxybutyrate-co-3hydroxyoctanoate, poly-3hydroxybutyrate-co- 4hydroxybutyrate-co-3hydroxyvalerate, poly-3hydroxybutyrate-co-3hydroxyvalerate, poly(3-hydroxybutyrate-co-4-hydroxybutyrate), poly-3-hydroxydodecanoate-3- hydroxy-9-decenoate, Poly(3-hydroxyoctanoate), poly (3- hydroxybutyrate), poly(3- hydroxybutyrate-co-3-hydroxyhexanoate), poly (3-hydroxybutyric acid-co-3- hydroxyvaleric acid)/ poly-hydroxybutyrate-co-valerate.
In an example polyhydroxyalkanoates (PHA) are in the amorphous form. In another example PHA are in the crystalline or semi-crystalline form.
Triacetin (glyceryl triacetate or triethyl glyceride)} is a chemical compound that belongs to the family of glycerol esters and is derived from glycerol by the esterification of three acetyl groups.
In an example the coating formulation comprises cellulose acetate having an
MFI (Melt Flow Index) in a range of 4- 50 g/10 min, preferably 4-16 g/10 min, more preferably 6 - 14 9/10 min (temperature of 190 °C and 2,16 kg).
In an example the coating formulation comprises a mixture of polylactic acid and polyhydroxyalkanoates, wherein the content of amorphous polyhydroxyalkanoates is in a range of 10-25 wt.%, based on the total weight of the mixture.
In an example the coating formulation comprises a mixture of 10-30 wt.% polylactic acid, 20-60 wt.% polybutylene adipate terephthalate and the remainder amount of thermoplastic starch, wherein the wt.% is based on the weight of the mixture.
In an example the coating formulation constitutes 0,8 - 10 wt.% of the seeds and/or fertilizers, preferably 1,9-2,5 wt.% of the seeds and/or fertilizers.
The coating formulation according to the present invention breaks down for at least 60% within a period of 60 days in an aqueous medium, according to OECD 301F standard.
According to OECD 301F standard a solution, or suspension, of the test substance in a mineral medium is inoculated and incubated under aerobic conditions in the dark or in diffuse light. The running parallel blanks with inoculum but without test substance permits to determine the endogenous activity of the inoculum. A reference compound (aniline, sodium acetate or sodium benzoate) is run in parallel to check the operation of the procedures. Normally, the test lasts for 28 days. At least two flasks or 5 vessels containing the test substance plus inoculum, and at least two flasks or vessels containing inoculum only should be used; single vessels are sufficient for the reference compound. In general, degradation is followed by the determination of parameters such as dissolved organic carbon (DOC), CO: production and oxygen uptake. The pass levels for ready biodegradability are 70% removal of DOC and 60% of theoretical oxygen demand (ThOD) or theoretical carbon dioxide {(ThCO;) production for respirometric methods. These pass values have to be reached in a 10-days window within the 28-days period of the test.
The present invention also relates to seeds provided with a coating formulation on its outer surface, wherein the coating formulation comprises one or more components chosen from the group of polylactic acid, polyhydroxyalkanoates, cellulose butyrate, cellulose acetate, cellulose diacetate, cellulose triacetate, cellulose acetate butyrate, triacetin, mixtures of polylactic acid, polybutylene adipate terephthalate and thermoplastic starch, or a combination thereof, wherein especially the coating formulation breaks down for at least 60% within a period of 60 days in an aqueous medium, according to OECD 301F standard.
The present invention also relates to fertilizers provided with a coating formulation on its outer surface, wherein the coating formulation comprises one or more components chosen from the group of polylactic acid, polyhydroxyalkanoates, cellulose butyrate, cellulose acetate, cellulose diacetate, cellulose triacetate, cellulose acetate butyrate, triacetin, mixtures of polylactic acid, polybutylene adipate terephthalate and thermoplastic starch, or a combination thereof, especially wherein the coating formulation breaks down for at least 60% within a period of 60 days in an aqueous medium, according to OECD 301F standard.
The present invention also relates to agricultural area provided with coated seeds and/or coated fertilizers as discussed above.
The coating formulation according to the present invention may further comprise additional components, for example active ingredients, such as fungicides, insecticides, or nutrients for controlled release and targeted application of these substances during germination and early growth. Other functional components of the coating formulation are clay, vermiculite, microorganisms, such as mycorrhizal fungi or bacteria, to enhance plant health and protect against soil-borne pathogens, micronutrients like zinc, iron, or boron to provide essential nutrients for early seedling development, enzymes, such as acetyl esterase, cellulase, esterase, lipase and cutinase, for promoting disintegration and biodegradation, hydrophilic polymers that absorb and retain water providing seeds with better access to moisture during germination and early growth, plant growth regulators, such as auxins or gibberellins, to stimulate germination, root development, and overall seedling vigour, colorants for easy visual identification of treated seeds, adjuvants to improve the adherence of treatments to seed surfaces, ensuring better efficacy.
Various methods may be employed to coat seeds and/or fertilizers and the choice of method depends on several factors such as the type of coating material and the scale of application. Examples of coating processes include: batch mixing wherein the seeds are placed in a container, the coating formulation is added and then thoroughly mixed to ensure even coating, rotary drum coating wherein seeds and the coating formulation are placed inside a rotating drum and as the drum rotates, the coating material adheres to the seeds, fluidized bed coating, wherein the seeds are suspended in a stream of air in a fluidized bed chamber and the coating formulation is then sprayed onto the seeds while they are suspended, ensuring a more uniform and controlled coating, pan coating, wherein the seeds are placed in a pan or rotating drum, and the coating formulation is applied through spraying, electrostatic coating, wherein an electrostatic charge is applied to the seeds, and the coating formulation is sprayed using an electrostatic spray gun after which the charged seeds attract the coating formulation, ensuring efficient and uniform coverage, encapsulation technologies, such as fluid bed encapsulation, coacervation, or extrusíon-coating may be employed for creating a protective shell around the seed with the desired coating formulation.
The present inventor found that a coating composition based on polymers can be directly melted or spread on fertilisers since fertilizers are relatively insensitive to elevated temperatures. However, the application on seeds of a coating composition based on polymers can be carried out by using a solution, such as an aqueous solution, for example via a film-forming solvent and evaporation of the solvent afterwards.
The foregoing and other features of the disclosure will become more apparent from the following detailed description and examples.
Example 1
An amount of 5 wi% CITROFOL (trademark, bio-based citrate ester manufactured by the esterification of citric acid and ethanol, supplied by
Jungbunziauer, CH) was added to PLA type LX175 (Luminy, joint venture Total
Corbion) and compounded to 1 mm micro beads.
Example 2
An amount of 5 wt.% Carbios active masterbatch {enzymatic activator) was added to PLA LX175 (Luminy, joint venture Total Corbion) and extruded and compounded to 1 mm micro beads.
Example 3
An amount of 20 wt.% amorphous PLA (BluePHA type 360, manufacturer
Bluepha, CN) was added to PLA LX175 (Luminy, joint venture Total Corbion) and extruded and compounded to 1 mm micro beads.
Example 4
An amount of 12 wt.% acetyl tributyl citrate (ATBC) and 2 wt.% calcium carbonate (CaCOs) was added to PLA LX175 (Luminy, joint venture Total Corbion) and extruded and compounded tc 1 mm micro beads.
Example 5
An amount of Blue Ridge (trademark, cellulose acetate flake, manufacturer
Celanese) to which 12 wt.% acetyl tributyl citrate (manufacturer TECNOSINTESI, IT) was added and extruded and compounded to 1 mm micro beads.
Compositions according to Example 1 to 5 were added into a heated 50 litre rotary drum device for coating fertiliser, namely Greenmaster (trademark, Pro-Lite
Double K having specific amounts of nitrogen, potassium, calcium and magnesium, manufacturer ICL Growing Solution, NL). The fertilizer was coated with a layer of polymer having a thickness of 60 micron. Subsequently, an amount of 50 gram of fertilizer beads thus coated were immersed in water.
The fertilizer beads provided with coating compositions according to Examples 1 to 5 significantly delayed the dissolution of the fertilizer compared to a non-coated fertilize thereby demonstrating the delay in fertilizer dissolution speed.
After a period of 12 days the coating composition according to Example 5 was fully dissolved, whereas the coating composition according to Example 1 was 46% dissolved, the remainder still virtually unaffected.
Example 6
Cellulose diacetate raw material powder (MFI of 8 9/10 min (temperature of 190 °C and 2,16 kg) supplied by Celanese was dispersed in water and used for coating seeds, namely linseed, i.e. SKU: 7105 Category (manufacturer Ornitalia, IT). The flake was mixed with an aqueous solution containing 5 wt.% of triacetin plasticiser and 0,5 wt.% of anti-block agent (glyceryl tri stearate} and the solution was sprayed onto the centre of a spinning disc for coating linseed. The seeds were thus coated with a layer of cellulose di-acetate having a thickness of 20 micron.
Claims (11)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2036885A NL2036885B1 (en) | 2024-01-24 | 2024-01-24 | method for coating seeds and/or fertilizers. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2036885A NL2036885B1 (en) | 2024-01-24 | 2024-01-24 | method for coating seeds and/or fertilizers. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL2036885B1 true NL2036885B1 (en) | 2025-08-06 |
Family
ID=92627021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL2036885A NL2036885B1 (en) | 2024-01-24 | 2024-01-24 | method for coating seeds and/or fertilizers. |
Country Status (1)
| Country | Link |
|---|---|
| NL (1) | NL2036885B1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0934918A1 (en) * | 1997-07-28 | 1999-08-11 | DAICEL CHEMICAL INDUSTRIES, Ltd. | Degradable coat bearing granular compositions for agricultural and horticultural use, biodegradable resin composition, moldings and films of the same, process for the production of films, and degradable trash bags |
| WO2016058096A1 (en) * | 2014-10-15 | 2016-04-21 | Terraverdae Bioworks Inc. | Bioactive biopolymer films and coatings |
| US20200255355A1 (en) | 2019-02-08 | 2020-08-13 | Agrinos AS | Microbial coating of controlled-release fertilizers |
| US20200339784A1 (en) * | 2015-06-30 | 2020-10-29 | BiologiQ, Inc. | Polymer and carbohydrate-based polymeric material blends with particular particle size characteristics |
| US20200369909A1 (en) * | 2019-05-24 | 2020-11-26 | Danimer Bioplastics, Inc. | Pla / pha biodegradable coatings for seeds and fertilizers |
| CN113816793A (en) * | 2021-09-30 | 2021-12-21 | 宜宾五粮液股份有限公司 | Organic release-controllable compound fertilizer structure |
| US20220159953A1 (en) | 2020-11-24 | 2022-05-26 | The United States Of America, As Represented By The Secretary Of Agriculture | Methods of protecting seeds from oxidants and microorganisms |
-
2024
- 2024-01-24 NL NL2036885A patent/NL2036885B1/en active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0934918A1 (en) * | 1997-07-28 | 1999-08-11 | DAICEL CHEMICAL INDUSTRIES, Ltd. | Degradable coat bearing granular compositions for agricultural and horticultural use, biodegradable resin composition, moldings and films of the same, process for the production of films, and degradable trash bags |
| WO2016058096A1 (en) * | 2014-10-15 | 2016-04-21 | Terraverdae Bioworks Inc. | Bioactive biopolymer films and coatings |
| US20200339784A1 (en) * | 2015-06-30 | 2020-10-29 | BiologiQ, Inc. | Polymer and carbohydrate-based polymeric material blends with particular particle size characteristics |
| US20200255355A1 (en) | 2019-02-08 | 2020-08-13 | Agrinos AS | Microbial coating of controlled-release fertilizers |
| US20200369909A1 (en) * | 2019-05-24 | 2020-11-26 | Danimer Bioplastics, Inc. | Pla / pha biodegradable coatings for seeds and fertilizers |
| US20220159953A1 (en) | 2020-11-24 | 2022-05-26 | The United States Of America, As Represented By The Secretary Of Agriculture | Methods of protecting seeds from oxidants and microorganisms |
| CN113816793A (en) * | 2021-09-30 | 2021-12-21 | 宜宾五粮液股份有限公司 | Organic release-controllable compound fertilizer structure |
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