WO2003020837A1 - Aqueous inoculant coating dispersion, method of seed sowing - Google Patents

Aqueous inoculant coating dispersion, method of seed sowing Download PDF

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Publication number
WO2003020837A1
WO2003020837A1 PCT/GB2002/003969 GB0203969W WO03020837A1 WO 2003020837 A1 WO2003020837 A1 WO 2003020837A1 GB 0203969 W GB0203969 W GB 0203969W WO 03020837 A1 WO03020837 A1 WO 03020837A1
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WO
WIPO (PCT)
Prior art keywords
coating
aqueous
agent
formulation according
adhesion agent
Prior art date
Application number
PCT/GB2002/003969
Other languages
French (fr)
Inventor
Piran Cargeeg
Ken Dyke
Original Assignee
Becker Underwood Limited
Isp Investments Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Becker Underwood Limited, Isp Investments Inc. filed Critical Becker Underwood Limited
Publication of WO2003020837A1 publication Critical patent/WO2003020837A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/24—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing ingredients to enhance the sticking of the active ingredients
    • 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
    • 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
    • C09D139/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen; Coating compositions based on derivatives of such polymers
    • C09D139/04—Homopolymers or copolymers of monomers containing heterocyclic rings having nitrogen as ring member
    • C09D139/06—Homopolymers or copolymers of N-vinyl-pyrrolidones

Definitions

  • This invention relates to an aqueous coating formulation, a method of coating surfaces using the formulation and to coated surfaces prepared using the coating method.
  • Aqueous formulations, incorporating a coating agent are frequently used to coat surfaces, especially growing surfaces such as turf, plant foliage and seeds, with a layer or coat of the coating agent.
  • examples include the application of pesticides, nutrients or biological inoculants to plant surfaces or seeds, the application of pigments or dyes to peat, bark chippings or turf, eg to form designs or markings on sports turf, such as a cricket, soccer or rugby pitches.
  • Such coating formulations often include a water soluble polymeric component, which is intended to enhance the adhesion of the coating agent to the surface to which it is applied.
  • formulations containing a water soluble polymeric adhesion agent tend to suffer from the disadvantage that the coated surface remains tacky, and requires significant drying. Where the surface to be coated is a seed, this can lead to agglomeration of the seeds, which in turn can make them difficult to handle and sow. In addition to the problem of tackiness, it is often difficult to remove final traces of water from the surface, which has to be removed by additional drying steps.
  • an aqueous coating formulation comprising a suspension of water insoluble polyvinylpyrrolidone (PVPP)-, an adhesion agent and a coating agent.
  • PVPP water insoluble polyvinylpyrrolidone
  • Water insoluble PNPP is a cross linked homopolymer of ⁇ -vinyl-2-pyrrolidone.
  • PVPP is a free flowing white powder, preferably with a particle size range of 10 to 400 microns.
  • PVPP with a particle size of 0.5 to 70 microns can be used. Such particle sizes are available commercially under the trade names
  • PVPP is insoluble in both water and common solvents.
  • adhesion agents which are water soluble.
  • a particularly preferred adhesion agent is polyvinylpyrrolidone (PNP), a polymer frequently used as a film forming agent, eg as a non-phytotoxic carrier, stabiliser and film former in seed coatings, is soluble in both water and many organic solvents.
  • PNP polyvinylpyrrolidone
  • PVP eg with an average molecular weight of from 5000 to 1.5 million daltons, for example with an average molecular weight of 8000, 57,500, 406,000 or 1,270,000 daltons is commercially available and could be used as the water soluble adhesion agent of the invention.
  • adhesion agents that could be used include copolymers of PNP.
  • Particular co- polymers that could be mentioned include vinylacetate/vinylpyrrolidone (PNP/VA) copolymers.
  • Certain properties, eg viscosity, softening point, water solubility and Hydrophilic/lipophilic balance (HLB), of PVP/NA copolymers vary, inter alia, with the vinylpyrrolidone/vinyl acetate ratio. In general, the higher the proportion of vinyl acetate monomer, the more hydrophobic the copolymer becomes.
  • - PNP/NA copolymers containing more than 60% by weight of vinyl pyrrolidone monomer are water soluble.
  • such copolymers may be added as a powder to the formulation mix, or as a solution, eg in water, or a lower alkanol, for example ethanol or isopropanol.
  • PVP copolymers that may be mentioned are copolymers of vinylpyrrolidone with styrene, and with dimethylaminoethyl methacrylate.
  • Additonal water soluble polymeric adhesion agents that may be mentioned alkylated vinylpyrrolidone copolymers and poly(methyl vinyl ether/maleic anhydride) copolymers.
  • the adhesion agent may also act as the coating agent, eg when the adhesion agent is a film forming agent, such as certain grades of alkylated vinylpyrrolidone copolymers.
  • the adhesion agent and the coating agent will be separate.
  • Typical coating agents include pesticides, nutrients, eg foliar feeds, dyes and/or pigments (when the formulation is intended for marking turf or playing surfaces).
  • a particular formulation that may be mentioned is an inoculant formulation, for coating seeds, with a microorganism having a beneficial effect on the seed, or the resulting plant.
  • Inoculant formulations or compositions are well known and are described in, for example, EP-A-253 673.
  • Microorganisms that may be used in the inoculant formulation include but are not limited to bacteria of the genera Rhizobium, Bacillus, Azotobacter, Pseudomonas, Azospirillium and Cyanobacteria (blue green algae), as well as mycorrhizal fungae.
  • an aqueous inoculant formulation which comprises at least one species of microorganism having a beneficial effect on a seed or a resulting plant, a suspension of a water insoluble polyvinylpolypyrrolidone and a water soluble polymeric adhesion agent.
  • the inoculant formulation may additionally include a carrier medium.
  • the carrier medium is preferably peat, in particular irradiated sedge peat.
  • a seed having a coating comprising at least one species of microorganism having a beneficial effect on the seed or resulting plant, an insoluble PNPP and an adhesion agent.
  • adhesion agent to be water soluble.
  • sowing seeds in which the seeds are sown together with an inoculant formulation as defined above.
  • the inoculant formulation may be applied either to the seeds at any time or to the soil at the time of sowing.
  • the inoculant formulations according to this invention may be used for the inoculation of dry seeds or they may be slurried with the water or water based carriers (e.g. pesticides and nutrients) when this type of inoculation is required.
  • water or water based carriers e.g. pesticides and nutrients
  • a 9.3 % suspension of the PVP/NA copolymer, product W735 (ISP) was prepared using cool clean dechlorinated water. 4.4 litres of this evenly mixed copolymer suspension were added to a premix tank. 2 x 1.6 kg units of a sterile peat based Rhizobium inoculant (HiCoat inoculant) containing greater than 4x10e9 cfu g of a selected strain of Bradyrhizobium japonicum were added to the premix tank, along with 100 g of PVPP. Impellers and paddles in the premix tank ensured a smooth lump free preinoculant slurry preparation, and also prevent settling-out. The prepared slurry was metered onto the soybean seed at circa 385 ml / 45.45 kg soybean seed, in a seed treatment drum. Evenly coated/free flowing seeds were transferred to a 1 ton (US) mini-bulk bag and stored until planting.
  • HiCoat inoculant HiCoat in

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  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Pest Control & Pesticides (AREA)
  • Organic Chemistry (AREA)
  • Plant Pathology (AREA)
  • Toxicology (AREA)
  • Dentistry (AREA)
  • Zoology (AREA)
  • Materials Engineering (AREA)
  • Soil Sciences (AREA)
  • Pretreatment Of Seeds And Plants (AREA)

Abstract

This invention relates to an aqueous coating formulation comprising a suspension of water insoluble polyvinylpolypyrrolidone, e.g. having a particle size range of from 10 to 400 microns, an adhesion agent e.g. polyvinylpyrrolidone and a coating agent.

Description

AQUEOUS INOCULANT COATING DISPERSION, METHOD OF SEED SOWING
This invention relates to an aqueous coating formulation, a method of coating surfaces using the formulation and to coated surfaces prepared using the coating method.
Aqueous formulations, incorporating a coating agent are frequently used to coat surfaces, especially growing surfaces such as turf, plant foliage and seeds, with a layer or coat of the coating agent. Examples include the application of pesticides, nutrients or biological inoculants to plant surfaces or seeds, the application of pigments or dyes to peat, bark chippings or turf, eg to form designs or markings on sports turf, such as a cricket, soccer or rugby pitches.
Such coating formulations often include a water soluble polymeric component, which is intended to enhance the adhesion of the coating agent to the surface to which it is applied. However, formulations containing a water soluble polymeric adhesion agent tend to suffer from the disadvantage that the coated surface remains tacky, and requires significant drying. Where the surface to be coated is a seed, this can lead to agglomeration of the seeds, which in turn can make them difficult to handle and sow. In addition to the problem of tackiness, it is often difficult to remove final traces of water from the surface, which has to be removed by additional drying steps. Failure to remove non-bound water from coated seeds can result, for example, in premature germination, loss of viability, increased microflora contamination, loss of activity of the coating agent and agglomeration. Surprisingly, we have. now found an aqueous coating formulation which overcomes, or at least substantially mitigates some or all of these disadvantages.
Thus, according to the invention we provide an aqueous coating formulation comprising a suspension of water insoluble polyvinylpyrrolidone (PVPP)-, an adhesion agent and a coating agent.
Water insoluble PNPP is a cross linked homopolymer of Ν-vinyl-2-pyrrolidone. Typically PVPP is a free flowing white powder, preferably with a particle size range of 10 to 400 microns. Alternatively, PVPP with a particle size of 0.5 to 70 microns can be used. Such particle sizes are available commercially under the trade names
AGPJMER® AT and AGPJMER® ATF respectively.
PVPP is insoluble in both water and common solvents. In contrast, we prefer adhesion agents which are water soluble. A particularly preferred adhesion agent is polyvinylpyrrolidone (PNP), a polymer frequently used as a film forming agent, eg as a non-phytotoxic carrier, stabiliser and film former in seed coatings, is soluble in both water and many organic solvents. PVP, eg with an average molecular weight of from 5000 to 1.5 million daltons, for example with an average molecular weight of 8000, 57,500, 406,000 or 1,270,000 daltons is commercially available and could be used as the water soluble adhesion agent of the invention.
Other adhesion agents that could be used include copolymers of PNP. Particular co- polymers that could be mentioned include vinylacetate/vinylpyrrolidone (PNP/VA) copolymers. Certain properties, eg viscosity, softening point, water solubility and Hydrophilic/lipophilic balance (HLB), of PVP/NA copolymers vary, inter alia, with the vinylpyrrolidone/vinyl acetate ratio. In general, the higher the proportion of vinyl acetate monomer, the more hydrophobic the copolymer becomes. For example, - PNP/NA copolymers containing more than 60% by weight of vinyl pyrrolidone monomer are water soluble. In preparing formulations according to the invention, such copolymers may be added as a powder to the formulation mix, or as a solution, eg in water, or a lower alkanol, for example ethanol or isopropanol.
Further PVP copolymers that may be mentioned are copolymers of vinylpyrrolidone with styrene, and with dimethylaminoethyl methacrylate.
Additonal water soluble polymeric adhesion agents that may be mentioned alkylated vinylpyrrolidone copolymers and poly(methyl vinyl ether/maleic anhydride) copolymers.
In certain circumstances, the adhesion agent may also act as the coating agent, eg when the adhesion agent is a film forming agent, such as certain grades of alkylated vinylpyrrolidone copolymers. However, more generally, the adhesion agent and the coating agent will be separate. Typical coating agents include pesticides, nutrients, eg foliar feeds, dyes and/or pigments (when the formulation is intended for marking turf or playing surfaces).
A particular formulation that may be mentioned is an inoculant formulation, for coating seeds, with a microorganism having a beneficial effect on the seed, or the resulting plant. Inoculant formulations or compositions are well known and are described in, for example, EP-A-253 673.
Surprisingly, we*have found that seeds treated with inoculant formulations containing insoluble PVPP are easier to handle, less tacky and /or do not need to be subjected to additional drying steps compared to seeds treated with inoculant formulations described in EP-A-253 673.
Microorganisms that may be used in the inoculant formulation include but are not limited to bacteria of the genera Rhizobium, Bacillus, Azotobacter, Pseudomonas, Azospirillium and Cyanobacteria (blue green algae), as well as mycorrhizal fungae.
Thus according to a further aspect of the invention we provide an aqueous inoculant formulation which comprises at least one species of microorganism having a beneficial effect on a seed or a resulting plant, a suspension of a water insoluble polyvinylpolypyrrolidone and a water soluble polymeric adhesion agent.
The inoculant formulation may additionally include a carrier medium. The carrier medium is preferably peat, in particular irradiated sedge peat.
According to the invention, we further provide a seed having a coating comprising at least one species of microorganism having a beneficial effect on the seed or resulting plant, an insoluble PNPP and an adhesion agent. We prefer the adhesion agent to be water soluble. We especially prefer a water soluble, polymeric adhesion agent.
According to a further aspect of the invention we provide a method of sowing seeds, in which the seeds are sown together with an inoculant formulation as defined above. The inoculant formulation may be applied either to the seeds at any time or to the soil at the time of sowing.
The inoculant formulations according to this invention may be used for the inoculation of dry seeds or they may be slurried with the water or water based carriers (e.g. pesticides and nutrients) when this type of inoculation is required.
The invention is illustrated by the following examples.
Example 1.
A 9.3 % suspension of the PVP/NA copolymer, product W735 (ISP) was prepared using cool clean dechlorinated water. 4.4 litres of this evenly mixed copolymer suspension were added to a premix tank. 2 x 1.6 kg units of a sterile peat based Rhizobium inoculant (HiCoat inoculant) containing greater than 4x10e9 cfu g of a selected strain of Bradyrhizobium japonicum were added to the premix tank, along with 100 g of PVPP. Impellers and paddles in the premix tank ensured a smooth lump free preinoculant slurry preparation, and also prevent settling-out. The prepared slurry was metered onto the soybean seed at circa 385 ml / 45.45 kg soybean seed, in a seed treatment drum. Evenly coated/free flowing seeds were transferred to a 1 ton (US) mini-bulk bag and stored until planting.

Claims

Claims
1. An aqueous coating formulation comprising a suspension of water insoluble polyvinylpolypyrrolidone , an adhesion agent and a coating agent.
2.- An aqueous coating formulation according to Claim 1, wherein the polyvinylpolypyrrolidone has a particle size range of from 10 to400 microns.
3. An aqueous coating formulation according to Claim 1, wherein the polyvinylpolypyrrolidone has a particle size range of from 0.5 to 70 microns.
4. An aqueous coating formulation according to any one of the preceding claims, wherein the adhesion agent is water soluble.
5. An aqueous coating formulation according to any one of the preceding Claims, wherein the adhesion agent is polyvinylpyrrolidone.
6. An aqueous coating formulation according to any one of the preceding Claims, wherein the adhesion agent is a copoloymer of polyvinylpyrrolidone.
7. An aqueous coating formulation, wherein the adhesion agent also acts as a coating agent.
8. An aqueous coating formulation, wherein the coating agent is one or more of a pesticide, nutrient or a pigment.
9. An aqueous inoculant formulation which comprises at least one species of microorganism having a beneficial effect on a seed or a resulting plant, a suspension of water insoluble polyvinylpolypyrrolidone and an adhesion agent.
10. An aqueous inoculant formulation according to Claim 9, wherein the formulation includes a carrier medium.
11. An aqueous inoculant formulation according to Claim 10, wherein the carrier -medium is peat.
12. A seed having a coating comprising at least one species of microorganism having a beneficial effect on the seed or resulting plant, an insoluble polyvinylpyrrolidone and an adhesion agent.
13. A method of sowing seeds, in which the seeds are sown together with an inoculant formulation according to Claim 9.
14. A method of coating seeds, which comprises coating the seeds with an inoculant formulation according to Claim 9.
PCT/GB2002/003969 2001-08-31 2002-08-30 Aqueous inoculant coating dispersion, method of seed sowing WO2003020837A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0121153A GB0121153D0 (en) 2001-08-31 2001-08-31 Aqueous coating formulation
GB0121153.1 2001-08-31

Publications (1)

Publication Number Publication Date
WO2003020837A1 true WO2003020837A1 (en) 2003-03-13

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8466087B2 (en) 2009-09-03 2013-06-18 Fbsciences Holdings, Inc. Seed treatment compositions and methods
US8597395B2 (en) 2009-09-28 2013-12-03 Floratine Biosciences, Inc. Methods of reducing plant abiotic stress by applying a composition comprising lignins, tannins, and hydrocarbons
US9090884B2 (en) 2005-09-08 2015-07-28 Advanced Biological Marketing Incorporated Formulations of viable microorganisms and their methods of production and use
US9102893B2 (en) 2005-09-08 2015-08-11 Advanced Biological Marketing Equipment lubricating microbial compositions
US9485991B2 (en) 2012-01-12 2016-11-08 Fbsciences Holdings, Inc. Modulation of plant biology

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4367609A (en) * 1980-07-28 1983-01-11 Coated Seed Limited Use of microorganisms in conjunction with seeds
JPS6248618A (en) * 1985-08-27 1987-03-03 Zeria Shinyaku Kogyo Kk Slow-releasing drug preparation and production thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4367609A (en) * 1980-07-28 1983-01-11 Coated Seed Limited Use of microorganisms in conjunction with seeds
JPS6248618A (en) * 1985-08-27 1987-03-03 Zeria Shinyaku Kogyo Kk Slow-releasing drug preparation and production thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 198714, Derwent World Patents Index; Class A97, AN 1987-099083, XP002226169 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9090884B2 (en) 2005-09-08 2015-07-28 Advanced Biological Marketing Incorporated Formulations of viable microorganisms and their methods of production and use
US9102893B2 (en) 2005-09-08 2015-08-11 Advanced Biological Marketing Equipment lubricating microbial compositions
US8466087B2 (en) 2009-09-03 2013-06-18 Fbsciences Holdings, Inc. Seed treatment compositions and methods
US10035736B2 (en) 2009-09-03 2018-07-31 Fbsciences Holdings, Inc. Seed treatment compositions and methods
US8597395B2 (en) 2009-09-28 2013-12-03 Floratine Biosciences, Inc. Methods of reducing plant abiotic stress by applying a composition comprising lignins, tannins, and hydrocarbons
US9485991B2 (en) 2012-01-12 2016-11-08 Fbsciences Holdings, Inc. Modulation of plant biology
US10448635B2 (en) 2012-01-12 2019-10-22 Fbsciences Holdings, Inc. Modulation of plant biology
US11712040B2 (en) 2012-01-12 2023-08-01 Fbsciences Holdings, Inc. Modulation of plant biology

Also Published As

Publication number Publication date
GB0121153D0 (en) 2001-10-24
AU2002321568A1 (en) 2003-03-18

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