WO2005002634A1 - Dispersion par vaporisation - Google Patents

Dispersion par vaporisation Download PDF

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Publication number
WO2005002634A1
WO2005002634A1 PCT/CH2004/000369 CH2004000369W WO2005002634A1 WO 2005002634 A1 WO2005002634 A1 WO 2005002634A1 CH 2004000369 W CH2004000369 W CH 2004000369W WO 2005002634 A1 WO2005002634 A1 WO 2005002634A1
Authority
WO
WIPO (PCT)
Prior art keywords
carrier substance
heating element
substance
sublimable
carrier
Prior art date
Application number
PCT/CH2004/000369
Other languages
English (en)
Inventor
Colin Brown
Guy Edward Naish
Original Assignee
Givaudan Sa
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 Givaudan Sa filed Critical Givaudan Sa
Priority to US10/561,753 priority Critical patent/US20070098376A1/en
Publication of WO2005002634A1 publication Critical patent/WO2005002634A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M1/00—Stationary means for catching or killing insects
    • A01M1/20—Poisoning, narcotising, or burning insects
    • A01M1/2022—Poisoning or narcotising insects by vaporising an insecticide
    • A01M1/2061—Poisoning or narcotising insects by vaporising an insecticide using a heat source
    • A01M1/2077—Poisoning or narcotising insects by vaporising an insecticide using a heat source using an electrical resistance as heat source
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/015—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone
    • A61L9/02—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone using substances evaporated in the air by heating or combustion
    • A61L9/03—Apparatus therefor

Definitions

  • This invention relates to the use of sublimable materials to transmit substances in the vapour phase into an atmosphere and to apparatus for achieving this.
  • an active substance such as a fragrance or an insecticide
  • a volatile liquid carrier which is then evaporated from an evaporating surface, typically a porous wick, optionally with the assistance of heat and/or forced ventilation.
  • Such systems are widely used and have enjoyed considerable success.
  • they can also have drawbacks.
  • One such drawback is the ease of spillage of the volatile liquid. This can be overcome, for example, by capturing the active substance and carrier in a gel. This in turn has the problem that there is no clear indication of the end of the life of the system (the gel remains when the active substance is exhausted). This means that it is hard to see when replacement is needed, in order for transmission of the active substance to continue.
  • the invention therefore provides an apparatus adapted to transmit an active substance in the vapour phase to an atmosphere, comprising an active substance incorporated in a sublimable carrier substance and a heating element that has a subliming effect on only part of the total sublimable carrier substance, carrier substance and heating element being arranged such that the sublimable carrier substance subliming at that part of the sublimable carrier substance affected by the heating element is replaced by further sublimable carrier substance.
  • the invention further provides a method of transmitting an active substance in the vapour phase into an atmosphere by incorporating the active substance into a sublimable carrier substance and heating the carrier substance by means of a heating element, the heating element having a subliming effect on only part of the carrier substance and the carrier substance being disposed with respect to the heating element such that carrier substance that sublimes is replaced by further carrier substance.
  • the active substance may be any such substance whose presence in an atmosphere is desired.
  • it may be a fragrance, a deodorant, an insecticide or other substance whose transmission into an atmosphere is desired.
  • the following lists of active substances are purely exemplary and do not restrict the choice of active materials in any way.
  • fragrances useful in the present invention include one or more materials selected from natural products such as essential oils, absolutes, resinoids, resins, concretes, and synthetic perfume components such as hydrocarbons, alcohols, aldehydes, ketones, ethers, acids, acetals, ketals and nitriles, including saturated and unsaturated compounds, aliphatic, carbocyclic and heterocyclic compounds.
  • natural products such as essential oils, absolutes, resinoids, resins, concretes, and synthetic perfume components
  • hydrocarbons such as hydrocarbons, alcohols, aldehydes, ketones, ethers, acids, acetals, ketals and nitriles, including saturated and unsaturated compounds, aliphatic, carbocyclic and heterocyclic compounds.
  • preferred fragrance components are any of those fragrances selected from Aldron,
  • Perfumes that may be used include any material which provides a fragrancing effect, including the fragrance materials recited above.
  • Insecticides or other insect control compositions useful in the present invention include one or more materials selected from such as citronella oil, tolu and Peru balsams, camphor, as well as other insecticides or other insect control compositions known to the art.
  • Sanitizing agents useful in the present invention include one or more materials selected from alcohols, glycols as well as other volatile sanitizing agents known to the art.
  • Givaudan Co ⁇ . (Teaneck, NJ); Berje Inc. (Bloomfield, NJ); BBA Aroma Chemical Div. of Union Camp Co ⁇ . (Wayne, NJ); Firmenich Inc. (Plainsboro NJ); Quest International Fragrances Inc. (Mt. Olive Township, NJ); Robertet Fragrances Inc. (Oakland, NJ).
  • the active substance may be provided in the form of a neat composition, or as an aqueous mixture, an organic mixture or an aqueous-organic mixture, which may include of one or more volatile or evaporable materials.
  • the sublimable carrier substance may be any such substance whose presence in the target atmosphere is innocuous. What may be considered as "innocuous” may vary considerably, depending on the nature of the use and the atmosphere - what may be considered innocuous in one location may not be thus considered in another. However, the skilled person can easily ascertain what is innocuous for any given application.
  • sublimable carrier substances include adamantane and derivatives thereof, para-dichlorobenzene, 2,4,6-triisopropyl-l,3,5-trioxane, camphor, naphthalene, 1,2,3- trichlorobenzene, 1,4-cyclohexanediol, menthol, acetamide, diphenylethane, hexachloroethane, benzoid acid, benzophenone, benzyl cinnamate, benzyl isoeugenol, benzylidene acetone, cedrol, cinnamic alcohol, coumarin, dimethyl fumarate, hydroquinone dimethyl ether, acetyl isoeugenol, methyl cinnamate, methyl coumarin, napthyl ethyl ether, phthalide, thymol.
  • adamantane and derivatives thereof para-dichlorobenzen
  • the sublimable carrier material when it is desired that the sublimable carrier material have little or no discernible odour, for example, when the device is used to deliver a fragrance or a perfume, a sublimable carrier material that has a noticeable scent, such as para-dichlorobenzene, camphor, and naphthalene, should be avoided as it may undesirably affect the consumer's perception of the fragrance or perfume being delivered.
  • Particularly useful and particularly preferred for use in the sublimable solid material are one or more materials selected from the group consisting of: camphor, 1,4-cyclohexanediol, tetrahydrodicyclopentadiene, and adamantane and derivatives thereof.
  • Adamantane is particularly preferred.
  • Further particularly preferred sublimable solid materials include adamantane derivatives as well as salts thereof.
  • useful derivatives of adamantane include: 1-acetoamido-adamantane, 1-adamantanecarboxylic acid, 1-aminoadamantane hydrochloride, 1-an ino-adamantane sulfate, 1-hydroxyadamantane, 1,3- dimethyladamantane, l-chloro-3,5-dimethyl-adamantane, adamantylmethlketone, 2- adamantanone, 2-methyl-2-adamantanol, 2-ethyl-2-adamantanol, and diamantane.
  • the sublimable carrier substance or mixture of such substances should be one that sublimes over time when maintained within the temperature range of about 0°C to about 30°C, preferably when maintained within the temperature range of about 5°C to about 30°C at normal atmospheric pressure.
  • particularly preferred sublimable carrier substances are adamantane, cyclododecane and tetrahydrodicyclopentadiene and mixtures thereof.
  • the active substance may be inco ⁇ orated into the sublimable carrier substance by any convenient means, for example by first mixing together the sublimable carrier substances (if more than one is used) and then thoroughly mixing in the active substance.
  • the carrier substance/active substance combination is preferably in a solid compressed mass. It may also be used in granular or powder form, but this is less convenient in use.
  • the sublimable carrier and the heating element are preferably provided with a support body whose function it is to maintain the two in a position relative to one another such that they can function properly and reliably.
  • the support body also provides the conduit for the energy required to sublime the carrier. This is generally electrical wiring leading to the heating element.
  • the form of the support body is not critical and it can be any suitable decorative or utilitarian shape that allows it to carry out its function.
  • the heating element may be any suitable heating element that has a subliming effect on only part of the sublimable carrier substance. It is preferably an electrical heating element. It may cause the sublimable carrier substance to sublime by radiant energy, that is, by the element not being in physical contact with the carrier substance and radiating its heat to the carrier substance. However, it is more efficient to have physical contact between heating element and carrier substance and this is preferred. Further preferred embodiments will be described hereinunder.
  • the heating element and the sublimable carrier substance are disposed in relation to each other so that the sublimable carrier substance subliming in the vicinity of the heating element is replaced by further carrier substance.
  • This can be achieved by any convenient means. For example, it may be achieved by mechanical or electrical means that causes more carrier substance to move into the vicinity of the heating element.
  • the heating element be located below the sublimable carrier substance and continuous feeding of sublimable carrier substance to replace the subliming carrier substance in the vicinity of the heating element be achieved by gravity.
  • the heating element may be an element that is placed at the bottom of a cylindrical solid of sublimable carrier substance, and as the carrier substance nearest the heating element sublimes under the heat of the element, its place is taken by unsublimed solid immediately above it.
  • the sublimable carrier substance is in granular or powder form, it may be housed in a tube mounted above a heating element and it is constrained to move towards the element as that carrier substance interfacing with the element sublimes. This works best when the heating element makes physical contact with the carrier substance, and more particularly when the carrier substance rests on a heated surface.
  • An especially useful heating element for use in this last-mentioned embodiment is an electrical heating element that is deposited on a surface on which the heated surface rests (hereinafter "surface heating element").
  • surface heating element This can be achieved by any suitable means, but again the simplest is the most preferred, namely the deposition of the element on a flat surface that is positioned in a horizontal plane below the sublimable carrier substance, with which it has contact. As the carrier substance sublimes, more carrier substance moves down to take its place.
  • a typical heating element of this type consists of a heating circuit of PTC (positive temperature coefficient) resistor paste screen-printed on to a flat substrate such as a 96% alumina plate or porcelain enamelled steel.
  • the carrier substance is located within a tube mounted above the surface heating element, which tube constrains the carrier substance.
  • the tube is at least partially transparent or sufficiently translucent to allow visual inspection, so that the use rate of the carrier substance may be observed and a replacement provided prior to its complete exhaustion.
  • This tube may be supplied as part of a refill, which can be easily fitted into and removed from a heating unit, which may be adapted to plug directly into an electrical power point.
  • the refill as mentioned hereinabove is preferably of the form of a tube that is completely sealed except for a vent at the lower end (adjacent to the heating element when the refill is in place) to permit the escape of sublimed material.
  • the lower end may be sealed by a conductive material, such as metal foil, so that, in position, the carrier substance rests on this foil and the heat of the heating element mounted in the support body is communicated through to the sublimable carrier in the tube.
  • the surface bearing the heating element itself forms the lower end of the tube and the support body provides only the wiring and electrical contacts for the heating element.
  • the invention therefore additionally provides an apparatus adapted to transmit in the vapour phase an active substance into an atmosphere, the apparatus comprising a support body and a replaceable active substance reservoir, the active substance being inco ⁇ orated in a sublimable carrier substance, which carrier substance is contained within a tube adapted to be mounted substantially vertically in the support body, the tube being completely sealed except for a vent at the lower end adapted to permit release of sublimed material, and the sealing of the lower end being accomplished by a surface bearing an electrical heating element, the support body comprising suitable electrical wiring and connections for the supply of heating electricity to the element.
  • the surface heating element has the considerable advantage that it can be made precisely the right size for any given application. It is also more efficient that other possible heaters, and it can be easily tailored to the correct temperature for a given active substance/sublimable carrier. It has the further advantage of being very safe, as it can be completely enclosed.
  • the embodiment hereinabove described, in which a replaceable refill has inco ⁇ orated therein a heating element, is especially safe, in that the removal of the refill for replacement also removes the hot element.
  • a tube constraining a sublimable carrier need not be vertical, but may be inclined to the vertical. If a tube is closed except for a vent at the bottom to allow the sublimed material to escape into the atmosphere, a portion of the sublimable material may rise vertically up the tube and condense on the walls and roof of the tube, making this material of no effect and possibly blocking the view of the sublimable carrier.
  • a suitably inclined tube, with the vent on the upper side of the incline, can substantially or completely overcome this problem.
  • the apparatus of this invention have a number of advantages over known apparatus. Not only do they effectively transmit active substances into an atmosphere, but they also are essentially free of the danger of spilling and they can be easily configured so that their impending exhaustion can easily be seen and a replacement provided, without loss of effect.
  • the preferred embodiments hereinabove described bring the other advantages already described of improved safety and efficiency.
  • Figure 1 is a schematic longitudinal cross-section of an apparatus according to the invention, with refill not present.
  • Figure 2 is a schematic longitudinal cross-section of the apparatus of Figure 1, with refill in place.
  • Figure 3 is a schematic longitudinal cross-section of a refill of a different embodiment of the invention.
  • the apparatus consists basically of a support body 1 and a refill 2.
  • the particular support body illustrated is basically rectilinear, but the shape is not restricted in any way and can be in any suitable practical or decorative form.
  • the support body comprises a recess 3, into which the refill 2 is removably fitted.
  • a planar electrical heating element 4 consisting of a flat alumina plate, on which has been screen printed a heating circuit of PTC resistor paste.
  • This circuit is connected by wires 5 to a control circuit 6 that contains a step-down transformer and may include other functional circuitry, such as a timing device for controlled release.
  • This control unit is supplied with mains electricity via electrical connecting pins 7 that fit into a wall socket.
  • the wiring and control circuit are housed within the support body and the connecting pins are integral with the support body.
  • the front panel 8 of the support body is sufficiently transparent such that the refill, and therefore the quantity of sublimable carrier remaining, can be seen and the need for a replacement refill therefore assessed.
  • the front panel additionally has a port 9, which allows the sublimable material to escape.
  • the refill 2 consists of a transparent plastic tube 10, open at that end that will be adjacent to the heating element. This open end is sealed by metal foil 11, which, when the refill is in place on the apparatus, sits on the heating element 4.
  • a stick of sublimable carrier 12 that inco ⁇ orates an active substance destined for release into an atmosphere.
  • the tube 10 has a vent 13, located at its lower end, so that it matches the port 9 in the front panel 8 and permits release of sublimed material into the atmosphere.
  • the port 13 is covered by a foil strip for transportation and storage, and this strip is removed immediately prior to placing the refill in the support body. Refill and support body are configured so that the refill is held firmly within the support body but it easily removed for replacement.
  • the apparatus In use, the apparatus is simply plugged into a suitable mains electrical outlet. This will supply current to the heating element 4, which in turn will heat the foil 11 , which will cause that part of the sublimable material 12 resting against the foil to sublime.
  • This sublimed material is released into the atmosphere through aligned ports 9 and 13.
  • the refill In Figure 3, the refill is configured so that the tube 14 is inclined away from the pe ⁇ endicular with respect to the plane of the foil 15.
  • the port 16 for release of sublimed material is located on the upper side of this tube. This substantially avoids any tendency of the sublimed material to rise up and condense in the interior of the tube of the refill, rather than go into the atmosphere.

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  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Epidemiology (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Insects & Arthropods (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

L'invention concerne un appareil adapté pour diffuser une substance active en phase vapeur dans une atmosphère, lequel appareil renferme une substance active incorporée dans une substance porteuse sublimable (12) et un élément chauffant (4) en contact seulement partiel avec la substance porteuse sublimable totale, cette substance porteuse et l'élément chauffant étant agencés de sorte que la substance porteuse sublimable se sublimant au niveau de l'interface entre l'élément chauffant et cette substance porteuse sublimable est remplacée par une autre substance porteuse sublimable. Cet appareil n'est pas sujet au déversement accidentel, comme le sont les appareils à base de liquide volatile actuels. Ledit appareil permet également d'observer facilement l'arrivée en fin de vie de la substance porteuse/active et la nécessité de remplacer cette dernière, de sorte qu'une diffusion en continu est assurée.
PCT/CH2004/000369 2003-07-02 2004-06-17 Dispersion par vaporisation WO2005002634A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/561,753 US20070098376A1 (en) 2004-06-17 2004-06-17 Vapour dispersion

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0315475A GB0315475D0 (en) 2003-07-02 2003-07-02 Apparatus and method
GB0315475.4 2003-07-02

Publications (1)

Publication Number Publication Date
WO2005002634A1 true WO2005002634A1 (fr) 2005-01-13

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PCT/CH2004/000369 WO2005002634A1 (fr) 2003-07-02 2004-06-17 Dispersion par vaporisation

Country Status (2)

Country Link
GB (1) GB0315475D0 (fr)
WO (1) WO2005002634A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1709980A1 (fr) * 2005-04-05 2006-10-11 Reckitt Benckiser (UK) LIMITED Emanateur
EP2829328A1 (fr) * 2013-07-22 2015-01-28 Hans-Michael Hangleiter GmbH Dispositif d'application d'au moins une liaison pouvant être sublimée et condensée, notamment d'un cyclododécane pouvant être condensé, sur des surfaces de substrats ou de composants solides ainsi que dispositif de détermination de la qualité, notamment de la surface, d'un substrat ou composant solide
EP2829329A1 (fr) * 2013-07-22 2015-01-28 Hans-Michael Hangleiter GmbH Procédé destiné à pourvoir une surface d'un substrat ou d'un composant solide d'une couche constituée d'au moins une liaison pouvant être sublimée, notamment d'une couche d'application de cyclododécane, ainsi que substrat ou composant obtenu d'après ce procédé
WO2015011165A1 (fr) * 2013-07-22 2015-01-29 Hans-Michael Hangleiter Gmbh Dispositif et un procédé d'application d'au moins un composé condensable et sublimable sur des surfaces de substrats ou éléments solides et substrat ou élément pouvant être obtenu par le procédé ainsi que dispositif et procédé de définition de la surface d'un substrat ou élément solide

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4425302A (en) * 1981-12-17 1984-01-10 Seimex, S.A. Household electric device, a sublimer of perfumed bars and/or insecticides
EP0571283A1 (fr) * 1992-05-22 1993-11-24 Pascal Giudicelli Procédé et dispositif pour la désinfection de locaux
US5647052A (en) * 1995-04-28 1997-07-08 Reckitt & Colman Inc. Volatile substance dispenser and method of dispensing a volatile substance with dissipation indication

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4425302A (en) * 1981-12-17 1984-01-10 Seimex, S.A. Household electric device, a sublimer of perfumed bars and/or insecticides
EP0571283A1 (fr) * 1992-05-22 1993-11-24 Pascal Giudicelli Procédé et dispositif pour la désinfection de locaux
US5647052A (en) * 1995-04-28 1997-07-08 Reckitt & Colman Inc. Volatile substance dispenser and method of dispensing a volatile substance with dissipation indication

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1709980A1 (fr) * 2005-04-05 2006-10-11 Reckitt Benckiser (UK) LIMITED Emanateur
EP2829328A1 (fr) * 2013-07-22 2015-01-28 Hans-Michael Hangleiter GmbH Dispositif d'application d'au moins une liaison pouvant être sublimée et condensée, notamment d'un cyclododécane pouvant être condensé, sur des surfaces de substrats ou de composants solides ainsi que dispositif de détermination de la qualité, notamment de la surface, d'un substrat ou composant solide
EP2829329A1 (fr) * 2013-07-22 2015-01-28 Hans-Michael Hangleiter GmbH Procédé destiné à pourvoir une surface d'un substrat ou d'un composant solide d'une couche constituée d'au moins une liaison pouvant être sublimée, notamment d'une couche d'application de cyclododécane, ainsi que substrat ou composant obtenu d'après ce procédé
WO2015011165A1 (fr) * 2013-07-22 2015-01-29 Hans-Michael Hangleiter Gmbh Dispositif et un procédé d'application d'au moins un composé condensable et sublimable sur des surfaces de substrats ou éléments solides et substrat ou élément pouvant être obtenu par le procédé ainsi que dispositif et procédé de définition de la surface d'un substrat ou élément solide

Also Published As

Publication number Publication date
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