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WO1991001086A1 - Produits chimiques a liberation lente - Google Patents

Produits chimiques a liberation lente Download PDF

Info

Publication number
WO1991001086A1
WO1991001086A1 PCT/GB1990/001125 GB9001125W WO9101086A1 WO 1991001086 A1 WO1991001086 A1 WO 1991001086A1 GB 9001125 W GB9001125 W GB 9001125W WO 9101086 A1 WO9101086 A1 WO 9101086A1
Authority
WO
WIPO (PCT)
Prior art keywords
chemical
carrier
base material
slow release
approximate range
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/GB1990/001125
Other languages
English (en)
Inventor
Robert William Wilson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO1991001086A1 publication Critical patent/WO1991001086A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • A01N25/34—Shaped forms, e.g. sheets, not provided for in any other sub-group of this main group
    • 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
    • C05G5/40—Fertilisers incorporated into a matrix

Definitions

  • This invention relates to a method of producing structures for slow release of chemicals such as biologically active chemicals.
  • Biologically active chemicals include pesticides, fungicides, plant nutrients, mould retardants and* algicides for example. There may also be a requirement for slow-release of other chemicals and it is to be understood that the method of the invention may be applicable on this
  • Biologically active chemicals often need to be released slowly over a period of time for optimum effectiveness.
  • a plant is susceptible to attack by a particular fungal growth, the plant may need to be protected by a fungicide throughout the growing season.
  • Plant foods need to be provided at a relatively slow but controlled rate.
  • algicides may need to be used in the water of a fish farm but may themselves have a harmful effect- on the fish if released in large doses.
  • SUBSTITUTE SHEET Conventionally, slow-release chemicals have been incorporated in, for example, porous materials from which they are gradually leached by the action of water.
  • a typical example is the plant food spike of porous wood into which a plant food has been absorbed and from which it gradually leaches over a period of weeks or months.
  • a method of producing a structure for the slow release of a chemical such as a biologically active chemical, the method comprising absorbing the chemical into a microporous carrier and incorporating the carrier into a base material capable of controlled breakdown to release the chemical.
  • the microporous carrier is a substance as defined in the claims of British patent no. 1576228.
  • the carrier has a density within the approximate range of 0.9 to 0.945 gm/cc 3 , a void volume of substantially 75%, a cell size within the approximate range of 0.5 to 6.0
  • the base material may comprise a pl astics material which may be biodegradable or slightly solubl e .
  • the structure for slow-rel ease of the chemical may be in the form of a foi l , a f ibre or a sponge-l ike material or may be provided as a coating on another substrate . In each case , the . material presents a relatively large surface to volume ratio . However , in some appl ications , the structure may be provided as a sol id block or pel let depending on the particular use to which it is to be put .
  • Embodiments of the invention wil l now be described by way of example only .
  • a plant nutrient and a wide-range pesticide are both absorbed into a microporous carrier of the type claimed in British patent no. 1576228.
  • This microporous carrier can absorb up to two-thirds of its own weight of such chemicals and, in a finely divided form, can be mixed into a base material .
  • the base material is a plastics material of a biodegradable type.
  • the resulting material is formed into a strip by extrusion, for example, and the strip is divided into small sticks, each of which can be inserted into the soil of a pot plant.
  • the plant nutrient and insecticide are then gradually SUBSTITUTE SHEET released by breakdown of the structure under the action of water as the plant is watered. This enables the plant to be cared for without feeding or spraying, merely by the application of the usual quantity of water.
  • the technique may be useful in domestic and in commercial horticulture.
  • an algicide is incorporated in the microporous carrier.
  • the algicide bearing carrier is then mixed with a base material of a suitable plastic such as polyethylene or polypropylene.
  • the resulting plastics material is formed into filaments or fibres and woven or otherwise formed into net.
  • a fish farm tank can then be. protected by means of the netting which prevents fish from being seized by fish-eating birds such as herons.
  • the action of the water in the fish farm tank slowly releases an algicide which prevents algae from bulding up in the water due to the shading effect of the netting.
  • algicide is used by direct application into the water then this can harm the fish or render them unfit for consumption. However, by slow release over a period of months from the shade netting, adequate quantities of algicide can be used to prevent algae growth without harmful effect on the fish or the consumer.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • General Health & Medical Sciences (AREA)
  • Organic Chemistry (AREA)
  • Agronomy & Crop Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Plant Pathology (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

Un produit chimique (tel qu'une substance nutritive pour les plantes, un pesticide et/ou un algicide) est absorbé par un porteur microporeux, et celui-ci est ensuite incorporé à une matière de base à dégradation régulée, telle qu'une matière plastique biodégradable, ou légèrement soluble. Ainsi, le produit chimique peut être dispersé de façon égale dans toute la matière de base, de sorte qu'il soit lentement libéré au cours de la dégradation de la matière.
PCT/GB1990/001125 1989-07-21 1990-07-20 Produits chimiques a liberation lente Ceased WO1991001086A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB898916776A GB8916776D0 (en) 1989-07-21 1989-07-21 Slow release chemicals
GB8916776.1 1989-07-21

Publications (1)

Publication Number Publication Date
WO1991001086A1 true WO1991001086A1 (fr) 1991-02-07

Family

ID=10660455

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1990/001125 Ceased WO1991001086A1 (fr) 1989-07-21 1990-07-20 Produits chimiques a liberation lente

Country Status (2)

Country Link
GB (1) GB8916776D0 (fr)
WO (1) WO1991001086A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994023573A1 (fr) * 1993-04-20 1994-10-27 E.I. Du Pont De Nemours And Company Fibres et reseaux de mailles solubles dans l'eau utiles comme formulations pour l'agriculture
EP0639545A1 (fr) * 1993-08-18 1995-02-22 VERWALTUNGSGESELLSCHAFT GEIGER TECHNIK GmbH & Co. KG Procédé de fabrication d'objets, en particulier d'engrais granulaire à libération prolongé et engrais en granulés
WO1998007318A3 (fr) * 1996-08-19 1999-05-27 Battelle Memorial Institute Procede de production de structures a liberation lente
NL1016052C2 (nl) * 2000-08-30 2002-03-01 Robert Marc Fifield Werkwijze voor het vrijgeven van een actief bestanddeel.
NL1017712C2 (nl) * 2000-09-22 2002-03-25 Louis Johan Wagenaar Kweeksysteem.
US8017061B2 (en) 2004-05-28 2011-09-13 Philipps-Universitat Marburg Invention concerning agricultural active substances
NO20160137A1 (en) * 2016-01-29 2017-07-31 Norsk Inst For Vannforskning Niva Distribution device (1) for treatment of fluid

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1576228A (en) * 1976-08-30 1980-10-01 Akzo Nv Microporous products and method for the preparation thereof
EP0094513A2 (fr) * 1982-05-14 1983-11-23 Akzo GmbH Article contenant un agent actif pour libération prolongée
EP0152190A1 (fr) * 1984-01-30 1985-08-21 Bend Research, Inc. Lutte contre les parasites chez les animaux

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1576228A (en) * 1976-08-30 1980-10-01 Akzo Nv Microporous products and method for the preparation thereof
EP0094513A2 (fr) * 1982-05-14 1983-11-23 Akzo GmbH Article contenant un agent actif pour libération prolongée
EP0152190A1 (fr) * 1984-01-30 1985-08-21 Bend Research, Inc. Lutte contre les parasites chez les animaux

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994023573A1 (fr) * 1993-04-20 1994-10-27 E.I. Du Pont De Nemours And Company Fibres et reseaux de mailles solubles dans l'eau utiles comme formulations pour l'agriculture
EP0639545A1 (fr) * 1993-08-18 1995-02-22 VERWALTUNGSGESELLSCHAFT GEIGER TECHNIK GmbH & Co. KG Procédé de fabrication d'objets, en particulier d'engrais granulaire à libération prolongé et engrais en granulés
WO1998007318A3 (fr) * 1996-08-19 1999-05-27 Battelle Memorial Institute Procede de production de structures a liberation lente
AU724384B2 (en) * 1996-08-19 2000-09-21 Battelle Memorial Institute Method of making controlled release devices
NL1016052C2 (nl) * 2000-08-30 2002-03-01 Robert Marc Fifield Werkwijze voor het vrijgeven van een actief bestanddeel.
NL1017712C2 (nl) * 2000-09-22 2002-03-25 Louis Johan Wagenaar Kweeksysteem.
WO2002037950A1 (fr) * 2000-09-22 2002-05-16 Louis Johan Wagenaar Systeme cultural
US8017061B2 (en) 2004-05-28 2011-09-13 Philipps-Universitat Marburg Invention concerning agricultural active substances
US8431064B2 (en) 2004-05-28 2013-04-30 Phillips-Universitat Marburg Method of using nanoscaled polymer fibers as carriers for agricultural substances
NO20160137A1 (en) * 2016-01-29 2017-07-31 Norsk Inst For Vannforskning Niva Distribution device (1) for treatment of fluid
NO342256B1 (en) * 2016-01-29 2018-04-30 Norsk Inst For Vannforskning Niva Distribution device (1) for treatment of fluid
US11109577B2 (en) 2016-01-29 2021-09-07 Niva Device, method, and system for distributing pesticide in a fish pen

Also Published As

Publication number Publication date
GB8916776D0 (en) 1989-09-06

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