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WO2018106534A1 - Agent de chloration encapsulé hydrosoluble - Google Patents

Agent de chloration encapsulé hydrosoluble Download PDF

Info

Publication number
WO2018106534A1
WO2018106534A1 PCT/US2017/064241 US2017064241W WO2018106534A1 WO 2018106534 A1 WO2018106534 A1 WO 2018106534A1 US 2017064241 W US2017064241 W US 2017064241W WO 2018106534 A1 WO2018106534 A1 WO 2018106534A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
composition
chlorinating agent
film
encapsulant
Prior art date
Application number
PCT/US2017/064241
Other languages
English (en)
Inventor
Scott SCHANEVILLE
Original Assignee
NC Brands, LP.
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 NC Brands, LP. filed Critical NC Brands, LP.
Publication of WO2018106534A1 publication Critical patent/WO2018106534A1/fr

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
    • A01N25/26—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 in coated particulate form
    • A01N25/28—Microcapsules or nanocapsules

Definitions

  • the present invention relates to materials and methods for encapsulating chemical agents.
  • Water soluble packaging is advantageous in applications which employ hazardous chemicals as are found in, for example, agrochemicals, bleaching agents, laundry detergents, industrial chemicals, pool chemicals, and the like. Water soluble packaging allows a user to employ the hazardous substances without coming into direct contact with dangerous chemicals. Additionally, unit dose packaging obviates the need for the user to measure the chemicals since each dose is pre-packaged.
  • the presently disclosed invention provides materials and methods for encapsulating chemicals used as chlorinating compounds in water.
  • One embodiment of the present invention composition comprises a water-soluble polymeric encapsulant and a water chlorinating agent encapsulated in the water soluble polymer encapsulant.
  • the water chlorinating agent comprises an alkali metal dichloroisocyanurate salt.
  • the water chlorinating agent comprising sodium dichloroisocyanurate.
  • Embodiments of the present invention may be formulated in a unit or pod dosage form.
  • the water-soluble polymeric encapsulant may be in the form of a water-soluble film.
  • the water-soluble polymeric encapsulant may be a flexible water- soluble film.
  • the water-soluble polymeric encapsulant may be a self-supporting water-soluble film.
  • the present invention also contemplates embodiments where the water chlorinating agent is stable or inert with respect to the water-soluble polymeric encapsulant.
  • Embodiments of the present invention may further comprise one or more of: an active compound, a disinfectant, an antimicrobial, a sporocide, a stabilizing agent, and a colorant.
  • the present invention further contemplates embodiments where the water-soluble polymeric encapsulant being configured to provide timed release of the encapsulated water chlorinating agent over a period of about 1 minute to about 4 weeks.
  • the present invention provides materials and methods for encapsulating sodium dichloroisocyanurate, or other similar chemicals used as chlorinating compounds in water.
  • the final product also allows for the stable and safe storage of said chemical by providing a barrier that helps to maintain the chemical properties and desired effects of the encapsulated chemicals.
  • the water soluble film is able to maintain the integrity of the encapsulated chemical while also providing the desired water solubility properties, such as the condition of water that it is being applied to, the temperature, and the desired delay in release of the encapsulated chemicals from a few seconds to hours.
  • this invention aims to provide final encapsulated pod products that can be of various weights, and dosages measured for specific application so that the end user will only need to place into a predetermined volume of water.
  • This invention can be used for any body of water limitless of size and containment; such as, but not limited to, buckets, jugs, tanks, pools, tubs, lakes or any other containment of water that would require the application and treatment with the encapsulated chemical.
  • the liquid, regardless of volume or type of containment, that the final product is placed into does not have to be of pure water, and can range from 0.1% to 100% water containing solution. It may contain various other substances, but not limited to, organic solvents, oils, biological material (human, animal, plant, bacteria, parasites, algae, etc), dissolved solids, suspending solids.
  • the self-supporting water soluble films embody the following properties: a specific matrix structure mat allows for proper dissolution of the final product, flexibility of film so that it can be formed into various structures, the ability to cast, fuse, weld, or seal the film, and to be inert and stable toward the encapsulated sodium dichloroisocyanurate, or any other chemical that would typically be used as a chlorinating agent in water
  • the water soluble films used to form the pods, and encapsulate sodium dichloroisocyanurate can also be formed with compounds incorporated into the matrix of (he film; such as, but not limited to, active compounds, disinfectant, antimicrobials, sporocides, and stabilizing agents.
  • the composition of the water soluble films are mainly polymer based.
  • the resulting film is self- supporting and is not dependent on the encapsulation of desired chemicals.
  • the formed film also exhibit the ability to be temporarily heated and cooled again while maintain structural integrity. This property allows for the ability to form seals and join the films together and maybe used to seal, fuse, and weld a single piece or multiple pieces or layers of film to form a pod, pocket, pouch, or vessel. This property also allows for the formation of various three dimensional shapes of pods, pocket, pouched, or vessel because more than one piece of film can be sealed fused together.
  • a multilayer or a multi-chambered final product allows for the ability to time release or delay release if desired. It maybe also used to incorporate various compounds that may be released in an ordered and desired pattern or sequence to achieve the desired effect of said combination, that would otherwise be ineffective or provide unwanted and undesired results if added all at once, or in the incorrect order.
  • the self-supporting films are composed of a mixture of polymers, plasticizers, emulsifiers, bonding agents, bulking agents, fillers, and stabilizing agents.
  • the desired composition chemicals and components can be mixed to form a homogenous emulsion of uniform consistency. This emulsion can then be cast in various forms, and heated to remove the solvent and form a self-supporting uniform film of unique properties such as stability, uniformity, and solubility.
  • the self-supporting films are composed of a mixture of polymers, plasticizers, emulsifiers, bonding agents, bulking agents, fillers, and stabilizing agents.
  • the desired composition chemicals and components can be premixed using various mixing methods to produce a uniform mixture of dry material that can then be heated via extrusion to form a self- supporting uniform film of unique properties such as stability, uniformity, and solubility .
  • the final product, in such that, the sodium dichloroisocyanurate is enclosed within the self- supporting water soluble film can be that of a greater density than lg/cm ⁇ and thus allow for the product to drop below the surface of the water when placed in.
  • the density of the final product is greater than lg/cm 3 , it is also possible to have the final product float on the surface of water through the entrapment of air during the formation of the pod with sodium dichloroisocyanurate contained within.
  • Sodium dichloroisocyanurate is typically used to sterilize and disinfect water, it can be used in pools or other similar bodies of water to provide a slow and constant source of chlorine.
  • the structure of sodium dichloroisocyanurate can be of conflict when trying to encapsulate into PVA based films.
  • the freely available hydrogen on the OH groups of PVA can be reacted and thus making the film insoluble.
  • sodium dichloroisocyanurate can react with the moisture in the air to release free chlorine which then also reacts with the polymer backbone that typically compose PVA based films.
  • Typical PVA based film are not sufficient for the long term encapsulation of sodium dichloroisocyanurate due the reaction that occur with water that is absorbed through the film, and reactions that occur with the polymer that composes the film.
  • this invention aims to greatly reduce and eliminate that incompatibilities that exist with the encapsulation of sodium dichloroisocyanurate into PVA based films.
  • One such approach is to provide a barrier between the structure of PVA and sodium dichloroisocyanurate. This can be achieved through the addition of polyethylene glycol (PEG) to the mixture of formulation to provide a barrier against moisture in the resulting final film.
  • PEG polyethylene glycol
  • sodium dodecyl sulfate can be added to allow for the uniform mixture of PEG into solution, and to provide additional assistance to the film's water solubility.
  • a second approach is to provide a stabilizing agent that can counteract the effect of sodium dichloroisocyanurate.
  • These compounds can be added to the formulation mixture, and remain embedded within the film, and protect the PVA polymer from reacting with sodium dichloroisocyanurate.
  • agents would be toxic or harmful to ingest or be in contact with, thus it is difficult to find an agent that can stabilize sodium dichloroisocyanurate but be relatively safe for human exposure.
  • One such compound is ascorbic acid, and it does provide the desired effect while remaining relatively safe for human contact.
  • both methods can be combined to achieve an increase in effective stabilization towards interaction of sodium dichloroisocyanurate with the film.
  • the emulsion mixture used for the preparation of the self-supporting film can be prepared as such.
  • the mixing vessel is heated and once the water is at the desired temperature, thepolymer mixture is added to the stirring solution, such as 88% hydrolyzed PVA.
  • the mixture is stirred until uniform.
  • a stabilizing agent such as ascorbic acid is added, followed by the addition of a surfactant, such as sodium dodecyl sulfate.
  • a moisture retention compound is added to mixture, such as polyethylene glycol (PEG).
  • PEG polyethylene glycol
  • the mixture solution should at this point be an emulsion of homogenous and uniform consistency.
  • a coloring agent may be added to the final solution thus allowing for colored film to be obtained.
  • the same mixture of chemicals used to form a homogenous emulsion solution for casting and film formation can be also be mixed into a dry homogenous mixture. This mixture can then be put through an extruder, maybe heated, and produce a ready film that should obtain the same properties as one formed from an emulsion mixture.
  • the modified emulsion can be introduced in a vessel and then cast into a film.
  • the processing can be any processing that can take an emulsion and form it into a film, which processing steps are not limited to those described herein. Examples can include extrusion, solution casting box apparatus, reverse roll coating casting, and other solution casting apparatus' known to those skilled in the art of solution casting.
  • the modified emulsion can be passed between rollers (e.g., casting rollers), and rolled onto a substrate at the desired wet gauge thickness.
  • the substrate can be a wax or silicone coated substrate that allows the film to be peeled therefrom once the film is stable.
  • the rollers can be adjusted to change the gap there between to change the wet gauge thickness of the film.
  • the film can be cured and solidified, such as by heating.
  • the film on the substrate can be passed through a heater (e.g., infrared heater) with air flow to provide convection heating, which is regulated to remove moisture from the film.
  • the film can be formed in this matter to inhibit rippling or other unfavorable characteristics, and may avoid blistering. Good throughout heating and curing can produce the desired film.
  • the film can be separated from the substrate. Such separation can include peeling, slicing, or parting the film from the substrate. The film can then be used in whole or cut into desired sizes.
  • the emulsion mixture is formed following this procedure.
  • D.I. water is added and the heat is set to a range of 30C tolOOC, or SO to 80C, or to approx. 70C.
  • the mixture is stirred at approx. 300RPM (this can vary).
  • the first compound to be added to the heated solution is sodium dodecyl sulfate. Allowing some time to stir to uniformity, polyethylene glycol is added to the stirring mixture. To this mixture then add ascorbic acid. Once stirred to uniformity, the 88% hydrolyzed polyvinyl alcohol powderis added to the mixture thus forming the backbone matrix of the film.
  • Blue coloring is finally added to obtain the desired color of the final film.
  • the mixture is then extracted from the vessel, and allowed to degas in a sealed container, until the solution is free of all major trapped gases. This solution is thus ready to be cast and formed into the final desired film or desired properties for encapsulation of sodium dichloroisocyanurate.
  • the emulsion can be taken from the existing mixing vessel or put into a run tank vessel and then it is cast on a line.
  • the process uses a very unique reversal roll method between two stainless steel rollers.
  • the casting roller in the front dictates the speed of the line.
  • a wax coated carrier paper or silicone paper or other coated or uncoated paper or other material starts at the casting box and can be used to carry the film forming composition through the oven.
  • the film is cast at the desired thickness to get a final thickness, and it goes through an infrared heater system, which has convection air flowing through from an exhaust fan to help draw the moisture off the film.
  • Good convection air flow in the tunnel that keeps the moisture coming off at a constant rate and as long as the line speeds matched with the temperature settings correctly, the process provides good uniform drying that doesn't have underneath wet spots under the film top layer.
  • the film is cast at the desired wet thickness to get the desired final thickness of the partially or completely dehydrated film.
  • the Film is dehydrated as it is carried through an infrared healer system, which has convection air flowing through from an exhaust fan to help draw the moisture off the film.
  • an infrared healer system By generating adequate convection air flow through the oven tunnel, moisture is evaporated from the film at a constant rate.
  • the speed of drying and the temperature settings are sufficiently matched, the end result is an evenly dried film.
  • This controlled heating and uniform heat application prevent the film from drying at an uneven pace which may cause a dried exterior covering wet film.
  • the dried film is collected on a spool containing the carrier paper (or other carrier medium) and the film at the end of the oven system.
  • ingredients may also be formed into the final film via the use of an extrusion method technique by those skilled in the art.
  • Plasticizers/moisrure retention compounds Glycerol/glycerin; Propylene Glycol; Fatty acids; Vegetable oil; Vegetable shortening; Olive oil; Soybean oil; Grape seed oil; Sunflower oil; Peanut oil; Corn oil; Canola oil; Rice Bran oil; Lard; Suet; Butter or Coconut oil.
  • Polysorbate 20 (polyoxyethylene (20) sorbitan 15 monolaurate); Polysorbate 40 (polyoxyethylene (20) sorbitan monopalmitate); Polysorbate 60 (polyoxyethylene (20) sorbitan monostearate); Polysorbate 80 (polyoxyethylene (20) sorbitan monooleate); Polyethylene glycol; Monoglycerides; Diglycerides; Triglycerides; Phospholipids; Lecithin; Sodium bis(2-ethylhexyl) sulfosuccinate (AOT); or sodium mono- and dimethylnaphthalene sulfonate (SMDNS).
  • AOT Sodium bis(2-ethylhexyl) sulfosuccinate
  • SDNS sodium mono- and dimethylnaphthalene sulfonate

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
  • Agronomy & Crop Science (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention concerne des matériaux et un procédé d'encapsulation d'agents chimiques. En particulier, la présente invention concerne des compositions et des procédés d'encapsulation d'un agent de chloration de l'eau dans un agent encapsulant polymère hydrosoluble.
PCT/US2017/064241 2016-12-06 2017-12-01 Agent de chloration encapsulé hydrosoluble WO2018106534A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201662430696P 2016-12-06 2016-12-06
US62/430,696 2016-12-06

Publications (1)

Publication Number Publication Date
WO2018106534A1 true WO2018106534A1 (fr) 2018-06-14

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PCT/US2017/064241 WO2018106534A1 (fr) 2016-12-06 2017-12-01 Agent de chloration encapsulé hydrosoluble

Country Status (1)

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WO (1) WO2018106534A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4725378A (en) * 1982-03-22 1988-02-16 The Dow Chemical Company Systems for delayed release of bleaching agents
US5384364A (en) * 1990-07-03 1995-01-24 Ecolab Inc. Stabilized detersive-system containing water soluble film article
US20020077264A1 (en) * 2000-07-24 2002-06-20 The Procter & Gamble Company Articles containing enclosed compositions
US20040118711A1 (en) * 2001-04-20 2004-06-24 Duffield Paul John Water soluble containers comprising at least two compartments
US20060049076A1 (en) * 2002-08-07 2006-03-09 Reckitt Benckiser (Uk) Limited Containers
US20160130538A1 (en) * 2013-06-19 2016-05-12 Conopco, Inc., D/B/A Unilever Multi-compartment water-soluble capsules
US20160230131A1 (en) * 2007-01-18 2016-08-11 Reckitt Benckiser N.V. Dosage element and a method of manufacturing a dosage element

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4725378A (en) * 1982-03-22 1988-02-16 The Dow Chemical Company Systems for delayed release of bleaching agents
US5384364A (en) * 1990-07-03 1995-01-24 Ecolab Inc. Stabilized detersive-system containing water soluble film article
US20020077264A1 (en) * 2000-07-24 2002-06-20 The Procter & Gamble Company Articles containing enclosed compositions
US20040118711A1 (en) * 2001-04-20 2004-06-24 Duffield Paul John Water soluble containers comprising at least two compartments
US20060049076A1 (en) * 2002-08-07 2006-03-09 Reckitt Benckiser (Uk) Limited Containers
US20160230131A1 (en) * 2007-01-18 2016-08-11 Reckitt Benckiser N.V. Dosage element and a method of manufacturing a dosage element
US20160130538A1 (en) * 2013-06-19 2016-05-12 Conopco, Inc., D/B/A Unilever Multi-compartment water-soluble capsules

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