WO1998023504A1 - Unite generatrice de gaz - Google Patents

Unite generatrice de gaz Download PDF

Info

Publication number
WO1998023504A1
WO1998023504A1 PCT/US1997/021139 US9721139W WO9823504A1 WO 1998023504 A1 WO1998023504 A1 WO 1998023504A1 US 9721139 W US9721139 W US 9721139W WO 9823504 A1 WO9823504 A1 WO 9823504A1
Authority
WO
WIPO (PCT)
Prior art keywords
compartment
generating unit
gas generating
gas
wall
Prior art date
Application number
PCT/US1997/021139
Other languages
English (en)
Inventor
Michael Felix Spruyt
Eddy Vos
Original Assignee
The Procter & Gamble Company
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 The Procter & Gamble Company filed Critical The Procter & Gamble Company
Priority to BR9713544-5A priority Critical patent/BR9713544A/pt
Priority to CA002271418A priority patent/CA2271418A1/fr
Priority to JP52472498A priority patent/JP2001506566A/ja
Publication of WO1998023504A1 publication Critical patent/WO1998023504A1/fr

Links

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
    • B65D83/60—Contents and propellant separated
    • B65D83/62—Contents and propellant separated by membrane, bag, or the like
    • B65D83/625—Contents and propellant separated by membrane, bag, or the like the propellant being generated by a chemical or electrochemical reaction
    • 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
    • B65D83/60—Contents and propellant separated
    • B65D83/66—Contents and propellant separated first separated, but finally mixed, e.g. in a dispensing head
    • B65D83/663—Contents and propellant separated first separated, but finally mixed, e.g. in a dispensing head at least a portion of the propellant being separated from the product and incrementally released by means of a pressure regulator

Definitions

  • the present invention relates to a gas generating unit.
  • a further aspect of the invention relates to an aerosol container having the gas generating unit sealed within the aerosol container, and wherein the gas generating unit generates gas to maintain or increase the internal pressure of the aerosol container.
  • WO91/07326 published on 30 May 1991, discloses a hollow compartment containing a pressurised gas.
  • the compartment is fitted inside a can of beer so that when the can is opened the hollow compartment releases its contents as a jet of gas into the beer.
  • Gas generating units could also be useful in aerosol containers, albeit for different reasons. It is well known in the aerosol industry that there is a need to move out HFC propellants on account of their environmental profile. The replacement choice has mostly been the low molecular weight hydrocarbons such as propane, butane, pentane, hexane, etc., but these are flammable gases which may not always be suitable for use inside confined appliances with potential ignition sources. For these reasons, the industry is seeking a move to more environmentally friendly chemicals.
  • a gas generating unit within the aerosol container would address these problems.
  • EP-A-0 044 887 published on 3 February 1982.
  • This application discloses a flexible bag which is assembled with acid and alkali components. The acid and alkali components are brought together to react and release a gas which inflates the bag.
  • the flexible bag is difficult and expensive to assemble and to place into aerosol cans on an automatic packing line.
  • An object of the present invention is to provide a gas generating unit which is easy and cheap to manufacture.
  • a further object of the invention is to provide a gas generating unit which can be charged into aerosol containers on a packing line, even a high-speed packing line, with minimal modification to the line.
  • a still further object of the invention is to provide a gas generating unit within an aerosol can which generates a gas pressure which will not exceed the can specifications for allowable internal pressure. In particular it is preferred that the gas generating unit will not generate a pressure greater than 12 bar at 50°C.
  • the gas generating unit of the present invention comprises at least two compartments, the first compartment and the second compartment being connected by a sealable communication means; the first compartment containing a liquid, wherein at least some of the liquid passes from the first compartment into the second compartment when the sealable communication means is opened, so that the liquid contacts at least one chemical reagent and causes a chemical reaction to take place which generates a gas
  • the objects of the invention are achieved by providing a gas generating unit which is substantially rigid, and wherein the wall of the gas generating unit has at least one hole so that the gas generated is released.
  • the first compartment contains an acid solution
  • the second compartment contains a solid carbonate or bicarbonate.
  • the first compartment contains water and the second compartment contains a mixture of at least two chemical reagents in solid form, the two chemical reagents being (a) an acid and (b) carbonate or bicarbonate.
  • the figure shows a cross-section taken through one embodiment of a gas generating unit of the present invention.
  • the gas generated by the gas generating unit depends on the chemical reagents selected for the second, or the first and second, compartments.
  • the alkali component is carbonate or bicarbonate, so the resulting gas is carbon dioxide .
  • carbonate is used to express either carbonate or bicarbonate.
  • the carbonate may be used in any salt form, but sodium, calcium and magnesium salts are preferred.
  • the acid may be any suitable acid, but it is preferably selected from the group consisting of citric acid, malic acid, malonic acid, fumaric acid, glycolic acid, tartaric acid, aspartic acid, succinic acid, glutaric acid, adipic acid, aconic acid, ascorbic acid, hydrochloric acid, sulphuric acid or mixtures thereof.
  • Particularly preferred are the organic acids, and most particularly preferred is maleic acid.
  • the first compartment contains an acid solution
  • the second compartment contains a solid carbonate or bicarbonate.
  • the first compartment contains water and the second compartment contains a mixture of at least two chemical reagents in solid form, the two chemical reagents being (a) an acid and (b) carbonate or bicarbonate.
  • the solid form of the carbonate and, when used in solid form, of the acid may be, for example as a powder or as a tablet.
  • the carbonate and acid may be placed in the second compartment as discrete, preferably premixed, powders.
  • either or both of the carbonate and acid may be in the form of separate tablets, or in the form of a mixed carbonate/acid tablet .
  • the chemical reaction is started when liquid passes from the first compartment into the second compartment through the communication means.
  • the communication means is closed prior to the first release of gas, and is then opened either once, or multiple times.
  • the communication means is preferably provided with a valve or a rupturable membrane .
  • the valve is designed to open only once, after which release of substantially all of the available gas takes place.
  • the valve is provided with a means for opening the valve when the external pressure drops below a preset minimum, and for closing the valve when the external pressure exceeds a preset maximum.
  • the release of gas may be repeated many times until all of the chemical reagents are consumed.
  • At least a part of the wall of the first compartment is made from a material which is permeable to gas.
  • a gas dispensing unit comprising a first compartment 1 and a second compartment 2.
  • the compartments are connected by a communication means 3 which is closed by a sealing valve 4.
  • the valve is connected to a valve stem 5.
  • the second compartment 2 is in direct communication with the outside of the gas generating unit by means of holes 6 in the wall of the second compartment .
  • the holes are shown blocked by a closing means 7 which prevents product from the outside of the gas generating unit from entering the second compartment 2 and contaminating the reactants.
  • the closing means is opened by the pressure of gas generated inside the second compartment 2, allowing the gas to pass out of the second compartment 2.
  • the first compartment 1 contains water
  • the second compartment 2 contains a tablet 20 made from dry powders of sodium carbonate and maleic acid.
  • a tablet 20 made from dry powders of sodium carbonate and maleic acid.
  • first and second compartments 1, 2 are permeable allowing the whole unit to equilibrate at a starting pressure of, for example, 10 bar.
  • a flexible wall 21 expands outwardly decreasing the pressure in the second compartment.
  • the flexible wall 21 is connected through the valve stem 5 to the valve 4.
  • This allows water to pass from the first compartment 1 into the second compartment 2, initiating a chemical reaction between the carbonate and the acid which releases carbon dioxide.
  • the carbon dioxide forces the closing means 7 to open, and passes out of the gas generating unit through the holes 6 in the wall of the second compartment 2.
  • the gas generating unit is placed within sealed container having a dispensing means, especially an aerosol container.
  • the aerosol container is provided with an initial charge of a propellant gas to pressurise it internally.
  • propellants include carbon dioxide, nitrogen, nitrous oxides, oxygen, air and mixtures thereof.
  • Liquifiable gases such as fluorocarbons (e.g. CFC, HCFC and HFC), alkanes (e.g. propane, butane, pentane, hexane) may also be used, but are preferably used in minor amounts to reduce any environmental and flammability concerns.
  • fluorocarbons e.g. CFC, HCFC and HFC
  • alkanes e.g. propane, butane, pentane, hexane
  • the internal pressure falls. At a certain minimum pressure the gas generating unit acts as described above to release additional gas into the aerosol container thereby raising the pressure.
  • the sealed container will comprise a liquid product which is dispensed by means of a dispensing means such as a valve or valve nozzle assembly.
  • the liquid product is dispensed in the form of a foam when the dispensing means is activated.
  • the use of the gas generating unit means that the density of the foam can be maintained almost constant throughout the life of the container. It is possible to provide a foam which when dispensed in twenty doses, each dose being equal in weight, has a density of the final dose which is no more than 10% higher than the density of the first dose.
  • a glass beaker 62mm internal height, 111mm internal diameter is degreased with a standard soap solution and well rinsed with distilled water.
  • the beaker is filled with foam until overflowing, excess foam being scraped off using a straight edge wiped across the top edge of the beaker.
  • the difference in weight of the full beaker (W2) minus the empty beaker (Wl) is the weight of foam.
  • the volume of the beaker (V) is known.
  • Foam density is calculated by (W2-WD/V.

Abstract

Cette invention concerne une unité génératrice de gaz et, sous un autre aspect, un conteneur aérosol dans lequel est scellée ladite unité génératrice de gaz. Cette dernière va générer un gaz permettant de maintenir ou d'accroître la pression interne dudit conteneur aérosol. L'unité génératrice de gaz comprend au moins deux compartiments, le premier (1) et le second (2) compartiments étant connectés par un système de communication étanche (3). Le premier compartiment (1) contient un liquide qui va passer en partie dans le second compartiment (2) lorsque le système de communication étanche (3) est ouvert. Le liquide va ainsi entrer en contact avec un ou plusieurs réactifs chimiques (20), et entraîner une réaction chimique qui va libérer un gaz. L'unité génératrice de gaz est globalement rigide, et sa paroi comprend au moins un trou (6) permettant de libérer le gaz ainsi généré.
PCT/US1997/021139 1996-11-25 1997-11-18 Unite generatrice de gaz WO1998023504A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BR9713544-5A BR9713544A (pt) 1996-11-25 1997-11-18 Unidade geradora de gás
CA002271418A CA2271418A1 (fr) 1996-11-25 1997-11-18 Unite generatrice de gaz
JP52472498A JP2001506566A (ja) 1996-11-25 1997-11-18 ガス発生装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP96870149A EP0844197A1 (fr) 1996-11-25 1996-11-25 Dispositif pour la production de gaz
EP96870149.0 1996-11-25

Publications (1)

Publication Number Publication Date
WO1998023504A1 true WO1998023504A1 (fr) 1998-06-04

Family

ID=8226182

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/021139 WO1998023504A1 (fr) 1996-11-25 1997-11-18 Unite generatrice de gaz

Country Status (7)

Country Link
EP (1) EP0844197A1 (fr)
JP (1) JP2001506566A (fr)
CN (1) CN1245470A (fr)
AR (1) AR011513A1 (fr)
BR (1) BR9713544A (fr)
CA (1) CA2271418A1 (fr)
WO (1) WO1998023504A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2783513B1 (fr) * 1998-09-23 2000-12-08 Techniplast Pulverisateur a generation de gaz propulseur integree
CN106000234B (zh) * 2016-07-06 2018-11-30 苏州芷宁信息科技有限公司 简易气体发生装置
KR101960023B1 (ko) * 2016-12-21 2019-03-20 김보경 이산화탄소 발생 장치
WO2018117669A1 (fr) * 2016-12-21 2018-06-28 Bo Kyeong Kim Générateur de dioxyde de carbone
RU2769066C2 (ru) * 2017-07-10 2022-03-28 Филип Моррис Продактс С.А. Картриджный узел с вентиляционным воздушным потоком
DE102022115090A1 (de) * 2022-06-15 2023-12-21 Henkel Ag & Co. Kgaa Kosmetisches Mittel in Form eines Schaums

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5035351A (en) * 1990-01-26 1991-07-30 Ccl Industries Inc. Method and apparatus for maintaining a pressure within a product dispenser
US5234140A (en) * 1992-07-28 1993-08-10 S. C. Johnson & Son, Inc. Re-useable aerosol container
US5285931A (en) * 1990-02-09 1994-02-15 Jaico C.V., Cooperatieve Vennootschap Pressure capsule for spray can and spray can which utilizes such pressure capsule
US5398850A (en) * 1993-08-06 1995-03-21 River Medical, Inc. Gas delivery apparatus for infusion
US5516004A (en) * 1994-06-23 1996-05-14 Quoin Industrial, Inc. Pressure regulator and amplifier

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3053422A (en) * 1960-10-14 1962-09-11 Earnest M Tenison Reusable aerosol dispenser
US3178075A (en) * 1964-03-19 1965-04-13 George M Riedl Pressurized container
US4376500A (en) 1980-07-25 1983-03-15 Enviro-Spray Systems, Inc. Expandable bag
ATE85239T1 (de) * 1987-10-15 1993-02-15 Coca Cola Co Apparatur zum chemischen erzengung und entnahme von gasen.
IE70665B1 (en) 1989-11-22 1996-12-11 Whitbread & Co Plc Carbonated beverage container
FR2690142B1 (fr) * 1992-04-17 1995-11-17 Oreal Recipient pressurise, en particulier boitier aerosol, pour la distribution sous pression d'un composant liquide ou pateux.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5035351A (en) * 1990-01-26 1991-07-30 Ccl Industries Inc. Method and apparatus for maintaining a pressure within a product dispenser
US5285931A (en) * 1990-02-09 1994-02-15 Jaico C.V., Cooperatieve Vennootschap Pressure capsule for spray can and spray can which utilizes such pressure capsule
US5234140A (en) * 1992-07-28 1993-08-10 S. C. Johnson & Son, Inc. Re-useable aerosol container
US5398850A (en) * 1993-08-06 1995-03-21 River Medical, Inc. Gas delivery apparatus for infusion
US5516004A (en) * 1994-06-23 1996-05-14 Quoin Industrial, Inc. Pressure regulator and amplifier

Also Published As

Publication number Publication date
EP0844197A1 (fr) 1998-05-27
AR011513A1 (es) 2000-08-30
CN1245470A (zh) 2000-02-23
JP2001506566A (ja) 2001-05-22
BR9713544A (pt) 2000-01-25
CA2271418A1 (fr) 1998-06-04

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