EP0220132B1 - Aerosolspender mit vollständiger verzögerter Ausgabe - Google Patents

Aerosolspender mit vollständiger verzögerter Ausgabe Download PDF

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Publication number
EP0220132B1
EP0220132B1 EP86810452A EP86810452A EP0220132B1 EP 0220132 B1 EP0220132 B1 EP 0220132B1 EP 86810452 A EP86810452 A EP 86810452A EP 86810452 A EP86810452 A EP 86810452A EP 0220132 B1 EP0220132 B1 EP 0220132B1
Authority
EP
European Patent Office
Prior art keywords
valve
sealing material
actuator
container
release
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.)
Expired - Lifetime
Application number
EP86810452A
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English (en)
French (fr)
Other versions
EP0220132A2 (de
EP0220132A3 (en
Inventor
Robert C. Pearce
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.)
Novartis Pharma GmbH
Sandoz AG
Original Assignee
Sandoz Erfindungen Verwaltungs GmbH
Sandoz AG
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 Sandoz Erfindungen Verwaltungs GmbH, Sandoz AG filed Critical Sandoz Erfindungen Verwaltungs GmbH
Priority to AT86810452T priority Critical patent/ATE61309T1/de
Publication of EP0220132A2 publication Critical patent/EP0220132A2/de
Publication of EP0220132A3 publication Critical patent/EP0220132A3/en
Application granted granted Critical
Publication of EP0220132B1 publication Critical patent/EP0220132B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/28—Nozzles, nozzle fittings or accessories specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/75—Aerosol containers not provided for in groups B65D83/16 - B65D83/74
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/75—Aerosol containers not provided for in groups B65D83/16 - B65D83/74
    • B65D83/752—Aerosol containers not provided for in groups B65D83/16 - B65D83/74 characterised by the use of specific products or propellants

Definitions

  • the main disadvantage of the total-release aerosol dispensers is their immediate actuation which exposes the operator to the contents of the containers.
  • USP 3,800,878 describes a fire extinquisher utilizing an eutectic material in conjunction with an auxiliary seal that isolates the eutectic material from the pressurized fluid of the container.
  • the eutectic material melts in response to an increase in ambient temperature.
  • the auxiliary seal is opened by the pressure within the container thereby permitting release of the fluid. It is rather dangerous to employ together such actuation stimuli as heat and pressure because the heat increases the pressure in the container which may explode.
  • US-A- 2 759 768 discloses a seal that can be removed by the pressure of the container contents.
  • the seal as defined in US-A 2,759,768 requires a solvent capable of dissolving the seal before the pressurized contents of the container can remove the seal.
  • the seal is in constant contact with the contents of the container and is not removed until it is softened by a solvent which is kept external to the container contents. There is no “valve” separating the contents of the container from the seal in the embodiments described in US-A 2,759,768.
  • the present invention is defined by independent claim 1, which is directed to a continuous aerosol dispenser, and by independent claim 11, wich is directed to a method for delaying the release at the contents of a continuous aerosol dispenser.
  • the present invention provides a simple, inexpensive, effective, practical and easy to handle means for delayed actuation. It is generally applicable and independent from external factors such as aqueous medium or heat. It provides a time delayed release for all kinds of total-release aerosol dispensers such as foggers, fumigators, insecticidal sprays and bombs, paint capsules, gas bombs, aerosols, oven cleaners, tear gas grenades, smoke grenades and explosives, and is particularly appropriate for distribution of pesticides, more particularly of insecticides.
  • the time delayed release of the aerosol dispenser of the invention is obtained with the aid of a material sealing the exit conduit of the dispenser and which material is susceptible to removal by the content of the dispenser's container.
  • the sealing material is removed, with delay over a predeterminable period of time, by the contents of the container upon mechanical actuation of the valve.
  • the sealing material may be in removable association with the valve, valve stem or actuator of said dispenser. After removal of the sealing material the content of the container is released.
  • sealing material is obtained through the pressure executed by the contents of the dispenser on the sealing material after actuation of the valve.
  • the sealing material may be optionally dissolved in, and/or disintegrated by the contents of the container after actuation of the valve.
  • valves valve stems, actuators and containers of total-release aerosol dispensers are known. Essentially all such dispensers may be adapted in accordance with the present invention.
  • the actuator is in the form of a so-called "overcap”.
  • Overcaps have the dual function of protecting the valve of an aerosol dispenser during storage and of actuating said valve, when inverted and remounted onto the dispenser (see USP 4 426 025).
  • the sealing material can be any material which can be placed in the conduit or on the orifice of the valve, valve stem, the actuator or between them and can be removed after actuation of the valve under the influence of the container's content.
  • Suitable sealing material may be any material removable under the pressure of the container's content after actuation and may for example be in foil form or have a soft plastic consistency.
  • sealing materials suitable for use in the present in­vention are adhesive or insulation tapes, e.g. tapes known under the trade names Scotch® 810, Scotch® CW 715 44AAV 4152, R- Tape® (CP-PAN)and Silver Cloth® Tape, preferably Scotch® 810 or Silver Cloth® Tape; polyolefins and natural and synthetic resins such as polyvinylchloride, polypropylene, ethylene ethyl acrylates, ethylene vinyl acetate, polyvinyl acetate, polyvinyl alcohol, butyl acrylate, rubbers and elastomers, polyisoprene, polystyrene, polyvinyl acetal, polyvinyl ethyl ether, polyethylene and similar materials, e.g. low density polyethylene foils formulated with paraffin wax, such as the laboratory films available from American Can Corp. under the trade name Parafilm®, preferably such films of 0.010 to 0.015 inches thickness;
  • the natural and synthetic resins may either be used alone or may be, and preferably are, employed in combination with a plasticizer and optionally other formulating agents such as dyes.
  • Sealing materials particularly suitable for use in the present in­vention are selected from adhesive or insulation tapes, laboratory films such as those known as Parafilm®, and natural or synthetic resins (such as rubbers, polyisoprenes or other aliphatic hydro­carbon resins, wood resins and the like).
  • resins particularly suitable for use as sealing agent are wood resins, e.g. wood resins having a softening point of more than 85°C, e.g. in the range of 90 to 105°C, such as low molecular weight aliphatic hydrocarbon resins derived mainly from dienes and other reactive olefin monomers, e.g. those known under the trade name Piccopale® resins (particularly Piccopale® 100-SF, available from Hercules Inc., Wilmington); and ethylene vinyl acetate (EVA) based resins, such as the EVA-wax-resin compositions known as Nevtac® resins (available from Neville Chemical Company), e.g. Nevtac® 100 and Super Nevtac® 99.
  • wood resins e.g. wood resins having a softening point of more than 85°C, e.g. in the range of 90 to 105°C
  • plasticizers suitable for use in the resin combinations are phthalates and adipates, e.g. dibutyl phthalate, dicyclohexyl­phthalate, diethyl phthalate, diisodecylphthalate, dimethyl phthalate, diphenyl phthalate, dioctyl phthalate, dioctyl adipate, butyl benzyl phthalate, diundecyl phthalate, the dialkyl phthtalate known under the trade name Santicizer® 711, the dialkyl adipate known under the trade name Santicizer® 97 and polymeric type plasticizers such as Santicizer® 261, 409, 411, 412,,429, 480, 481, 482, 334 F, 79TM-trimellitate type, particularly suitable plasticizers are dioctyl phthalate (DOP), butyl benzyl phthalate (Santicizer® 160; BBP) and diocty
  • the most appropriate sealing materials for use in this invention are laboratory films such as those known as Parafilm® and referred to herein above, particularly such films having a thickness of 0.005-­ 0.015, more preferably of 0.01-0.015 inches, and resin/plasticizer combinations mixed in a weight ratio from 50 : 50 to 90 : 10, preferably from 70 : 30 to 90 : 10.
  • Particularly suitable resin/plasticizer combin­ations comprise from 75-85% by weight of resin and 15 to 25% by weight of plasticizer. They may additionally comprise formulating agents, e.g. 1 part for 100 parts resin/plasticizer combination.
  • a preferred example of formulation comprises from 79-82% by weight of resin, 17-22% by weight of plasticizer, the balance being formulating agents such as dyes, e.g. fluorescent dyes such as fluorescent orange, fluorescent yellow, fluorescent blue, fluorescent red and fluorescent black.
  • the sealing material can be placed at any place of the exit conduit allowing sealing of the terminal orifice of the aerosol dispenser; it may be placed in the conduit or on the orifice of the valve, valve stem or actuator and in some instances it may also cover the surroundings thereof.
  • the valve, valve stem and actuator may have any size or shape; it is only necessary to secure that the amount of sealing material employed is sufficient to completely block the terminal orifice of the aerosol dispenser.
  • the sealing material may be introduced at the desired place of the exit conduit (valve-, valve stem-, or actuator orifice or conduit) by known techniques, e.g. manually, by injection, hot molding, dip-coating, coating or other techniques well known in the art.
  • Fig. 1A is a plan view of the top of the overcap; Fig. 1B is a side sectional view of said overcap and Fig. 1C is enlarged view of the middle section of the overcap in a position in which it is used for delayed actuation.
  • the cap which normally serves as a cover for shipping or storing is inverted to actuate the valve of the can.
  • the content of the container interacts with the sealing material (by pressure or solvent effects) and begins to actuate such material until it is displaced. 0nly then the content of the can is released.
  • FIG. 2 is a side sectional view of the aerosol valve assembly showing the stem 6, body of the valve 7, diptube 8 and mounting cup 9.
  • buttons-lock actuator Handbook of Aerosol Technology, supra at 111
  • the sealing material placed either "on” 10 or “in” 11 the orifice 12 of the actuator.
  • Fig. 3A is a side sectional view of the actuator and Fig. 3B is an enlarged view of the middle section thereof.
  • the content of the container interacts with the sealing material placed "in” or “on” the orifice of the actuator and begins to affect such material until it is displaced.
  • the content of the can is only released with time delay, i.e. after expiration of the time required for the removal of the sealing material.
  • the sealing materials are either placed between the valve and the actuator, or built “in” or “on” the actuator or the valve stem of the total-release container.
  • the delayed actuation is triggered by engaging the actuator (i.e. by opening the valve).
  • the container's content begins then to affect the sealing material, which results finally - after a predeterminable period of time - in the removal of such sealing material and allows thereupon the delayed total-release of the contents of the aerosol dispenser.
  • the delay in time depends on the type and amount of sealing material used and on the contents of the container.
  • the sealing material can be placed either “in” or “on” the valve, preferably valve stem, into the stem orifice(s), if there are any, in the wall of the stem or in the stem seat (spring cap).
  • the details describing the different types of valves, valve stems and various other parts thereof can be found in Handbook of Aerosol Technology, supra, pp. 85-111.
  • the sealing material can be placed “in” or “on” the actuator or overcap of any size or shape. Actuators and their functions are generally described in Handbook of Aerosol Technology, supra, pp. 111-114.
  • the orifice can be of various shapes and sizes. Such orifices are made in conventional manner.
  • the current invention is useful for any kind of administration and total-release of harmful, hazardous, noxious or unpleasant contents of various containers and similar devices to the surrounding environment, which administration could be otherwise harmful, un-pleasant, impractical or risky to the operator of such device. In such situations, time is needed to get away from the container before it releases its contents.
  • the device of this application allows the application of various pesticides, fumigating agents, even hazardous materials which normally cannot be applied without safety hazards, without complicated health protections such as masks, respirators, special clothes, etc. Sometimes, such materials cannot be applied at all without substantial health risk to the operator.
  • the operator of a device containing any kind of harmful substance installs the device in the appropriate place, engages the actuator, valve or other triggering unit and leaves.
  • the sealing material now comes in contact with the contents of the container which slowly acts onto the sealing material which is susceptible to that content. In due time (controlled by choice of materials, thickness, formulation, dimensions and location), such material fatigues and is displaced thus opening the terminal orifice in the system and allows the content of the container to be released to the environment.
  • the device of this invention can be similarly used to activate fire extinguishers in a case of unattended fire, tranquilize wild animals or disturbed or violent people without endangering personnel, administer various detoxicants, disinfectants, anesthetic agents and other agents of a similar type.
  • the uses such as a landing area marker or a rescue markersite is also possible.
  • This example illustrates a delayed actuation using containers with various contents and unformulated sealing materials susceptible to actuation.
  • An adhesive disk of the materials listed below was placed over/on an exit orifice of total release actuator of pressurized insecticide/ solvent containg room fogger. Then the actuator was engaged and the time delay measured in which the actual release from the container occurred.
  • the solvent and/or pressure from the fogger was able to disintegrate the tape within 1.5 to 3 seconds.
  • Grease was placed in the valve stem of the aerosol container, the valve was opened and the time delay of the actuation was measured.
  • the pressure of the aerosol was able to push through the orifice the grease in approximately 1 second.
  • a piece of Parafilm ® of various thicknesses was placed at the interface of a valve stem and actuator of the generally available insecticidal total-release bomb fogger and the delayed actuation was measured.
  • High density polyethylene film (3/1000 inches) was installed at the interface of the valve and actuator of room fogger and the time delay measured.
  • Polyethylene material did not rupture, dissolve or disintegrate for at least 60 minutes of the experiment.
  • This example illustrates a delayed actuation using various con­tainers, actuating agents and formulated materials susceptible to actuation.
  • D.O.A. means dioctyl adipate
  • FD&C means Food, Drugs & Cosmetics.
  • Fogger actuators used in this example were a standard button-lock type (total release # 01-3686) obtained from Precision Valve Corp., Yonkers, N.Y., an overcap (total release overcap # C82-0118-00)obtained from Seaquist, Division of Pittway Corp., Cary, I1., and a fogger actuator cap from Seaquist. (# means catalogue number.)
  • the above formulations produced a small resin worm which passed through the fogger actuator until all of the resin/plasticizer formulation which blocked the orifice was expelled. Due to solvent and/or pressure effects on the resin/plasticizer formulation, the formulation ruptured and allowed for total-release of the contents of the fogger.
  • Formulations useful for delayed actuation were prepared by mixing the D.O.A. with fluorescent dye, for example fluorescent orange or fluorescent yellow or with blue, red, black or other dye pigments. The mixture was heated up to 100°C. Then, the polymer resin was added and the whole mixture was heated up to 100°C again until it was molten and homogenous. In the molten stage it was applied to the actuator, valve stem, valve or orifice therein.
  • fluorescent dye for example fluorescent orange or fluorescent yellow or with blue, red, black or other dye pigments.

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Medicinal Preparation (AREA)
  • Nozzles (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Sealing Material Composition (AREA)
  • Steroid Compounds (AREA)

Claims (11)

1. Kontinuierlicher Aerosolzerstäuber, umfassend einen Behälter, eine Auslaßleitung, die mit einem Endmundstück, einem Ventilschaft, einem Ventil, einem kontinuierlichen Ventilsprühkopf zum Austragen des Behälterinhalts durch das Endmundstück endet, dadurch gekennzeichnet, daß ein Dichtungsmaterial zwischen dem Ventil und dem Sprühkopf angeordnet ist oder in oder auf dem Sprühkopf oder auf dem Ventilschaft gebildet ist, und daß das Ventil den Behäl­terinhalt von dem Dichtungsmaterial trennt, wobei bei mechani­scher Betätigung des Ventils das Dichtungsmaterial nach einem vorbestimmbaren Zeitraum durch den Druck, der durch den Behäl­terinhalt ausgeübt wird, entfernt werden kann, wodurch die Freisetzung des Behälterinhalts über einen solchen vorbestimm­baren Zeitraum verzögert wird.
2. Vorrichtung nach Anspruch 1, wobei das Dichtungsmaterial ausgewählt ist aus der Gruppe bestehend aus Polyethylen, Laborfolie und einer eingestellten Zusammensetzung von Harz und Weichmacher.
3. Vorrichtung nach Anspruch 2, wobei die Laborfolie eine Polyethylenfolie niedriger Dichte ist, die mit Paraffinwachs formuliert ist.
4. Vorrichtung nach Anspruch 2, wobei das Dichtungsmaterial eine eingestellte Zusammensetzung von Polymerharz und Weich­macher ist, so daß die Formulierung das Harz und den Weich­macher in einem Gewichtsverhältnis von 50 : 50 bis 90 : 10 um­faßt.
5. Vorrichtung nach Anspruch 4, wobei das Dichtungsmaterial eine Formulierung ist, die 79 bis 82 Gew.-% Harz, 17 bis 20 Gew.-% Weichmacher umfaßt, wobei der Gewichtsausgleich Formu­lierungsmittel sind.
6. Vorrichtung nach Anspruch 4 oder 5, worin der Weichmacher ein Phthalat oder Adipat ist.
7. Vorrichtung nach einem der Ansprüche 1 bis 6, worin das Dichtungsmaterial sich an der Grenzfläche zwischen Ventil und Ventilsprühkopf befindet.
8. Vorrichtung nach einem der Ansprüche 1 bis 6, wobei das Dichtungsmaterial mit dem Ventilschaft entfernbar verbunden ist.
9. Vorrichtung nach einem der Ansprüche 1 bis 6, wobei das Dichtungsmaterial mit dem Ventilsprühkopf entfernbar verbun­den ist.
10. Vorrichtung nach Anspruch 9, wobei der Sprühkopf als Ab­schlußkappe ausgebildet ist.
11. Verfahren zum Verzögern der Freisetzung des Inhalts eines kontinuierlichen Aerosolzerstäubers, wobei der Zerstäuber einen Behälter, eine Auslaßleitung, die mit einem Endmund­stück, einem Ventilschaft, einem Ventil und einem kontinier­lichen Ventilsprühkopf zum Austragen des Behälterinhalts durch das Endmundstück endet, umfaßt, wobei das Verfahren daraus be­steht, daß man ein Dichtungsmaterial, das nach einem vorbe­stimmbaren Zeitraum durch den Druck, den der Behälterinhalt aus­übt, entfernt werden kann, zwischen Ventil und Sprühkopf an­ordnet oder das Dichtungsmaterial in oder auf dem Sprühkopf oder auf dem Ventilschaft ausbildet, so, daß das Ventil den Behälterinhalt von dem Dichtungsmaterial trennt, wodurch bei mechanischer Betätigung des Ventils das Dichtungsmaterial nach einem vorbestimmbaren Zeitraum entfernt wird und dadurch die Freisetzung des Behälterinhalts verzögert wird.
EP86810452A 1985-10-24 1986-10-14 Aerosolspender mit vollständiger verzögerter Ausgabe Expired - Lifetime EP0220132B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86810452T ATE61309T1 (de) 1985-10-24 1986-10-14 Aerosolspender mit vollstaendiger verzoegerter ausgabe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US79092585A 1985-10-24 1985-10-24
US790925 1985-10-24

Publications (3)

Publication Number Publication Date
EP0220132A2 EP0220132A2 (de) 1987-04-29
EP0220132A3 EP0220132A3 (en) 1988-03-02
EP0220132B1 true EP0220132B1 (de) 1991-03-06

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EP86810452A Expired - Lifetime EP0220132B1 (de) 1985-10-24 1986-10-14 Aerosolspender mit vollständiger verzögerter Ausgabe

Country Status (11)

Country Link
EP (1) EP0220132B1 (de)
JP (1) JPS62121668A (de)
AT (1) ATE61309T1 (de)
AU (1) AU595252B2 (de)
CA (1) CA1317915C (de)
DE (1) DE3677886D1 (de)
ES (1) ES2020947B3 (de)
GR (1) GR3002021T3 (de)
HK (1) HK6094A (de)
IL (1) IL80396A0 (de)
ZA (1) ZA868128B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW533865U (en) 1997-06-10 2003-05-21 Glaxo Group Ltd Dispenser for dispensing medicament and actuation indicating device
CN2695385Y (zh) 2003-10-08 2005-04-27 金宪扬 一种气雾剂喷罐

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3399806A (en) * 1967-05-01 1968-09-03 Procter & Gamble Delayed opening dispenser
US4426025A (en) * 1979-06-21 1984-01-17 Seaquist Valve Co. Continuous spray overcap
AU7431081A (en) * 1980-05-15 1982-02-18 Logan, V.F. Remote control of spray can
US4667855A (en) * 1980-11-25 1987-05-26 W. R. Grace & Co. Method of reducing failure of pressurized container valves
US4478044A (en) * 1981-08-05 1984-10-23 Enviro-Spray Systems, Inc. Inflatable pouch and method of manufacture

Also Published As

Publication number Publication date
HK6094A (en) 1994-01-28
EP0220132A2 (de) 1987-04-29
CA1317915C (en) 1993-05-18
ZA868128B (en) 1988-06-29
DE3677886D1 (de) 1991-04-11
ES2020947B3 (es) 1991-10-16
ATE61309T1 (de) 1991-03-15
EP0220132A3 (en) 1988-03-02
AU6435186A (en) 1987-04-30
JPS62121668A (ja) 1987-06-02
AU595252B2 (en) 1990-03-29
GR3002021T3 (en) 1992-12-30
IL80396A0 (en) 1987-01-30

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