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Aerosol spray dispenser

March 20, 2023

For the high-temperature explosive weapon also known as an aerosol bomb, see Thermobaric weapon.

Aerosol spray is a type of dispensing system which creates an aerosol mist of liquid particles. It comprises a can or bottle that contains a payload, and a propellant under pressure. When the container's valve is opened, the payload is forced out of a small opening and emerges as an aerosol or mist.

Aerosol spray can

History

 
The aerosol spray canister invented by USDA researchers, Lyle Goodhue and William Sullivan.

The concepts of aerosol probably go as far back as 1790.[1] The first aerosol spray can patent was granted in Oslo in 1927 to Erik Rotheim, a Norwegian chemical engineer,[1][2] and a United States patent was granted for the invention in 1931.[3] The patent rights were sold to a United States company for 100,000 Norwegian kroner.[4] The Norwegian Postal Service, Posten Norge, celebrated the invention by issuing a stamp in 1998.

In 1939, American Julian S. Kahn received a patent for a disposable spray can,[5][6] but the product remained largely undeveloped. Kahn's idea was to mix cream and a propellant from two sources to make whipped cream at home—not a true aerosol in that sense. Moreover, in 1949, he disclaimed his first four claims, which were the foundation of his following patent claims.

It was not until 1941 that the aerosol spray can was first put to effective use by Americans Lyle Goodhue and William Sullivan of the United States Bureau of Entomology and Plant Quarantine, who are credited as the inventors of the modern spray can.[7][8] Their design of a refillable spray can, dubbed the aerosol bomb or bug bomb, is the ancestor of many commercial spray products. It was a hand-sized steel can charged with a liquefied gas under 75 pounds of pressure and a product to be expelled as a mist or a foam.[9] A public-service patent was issued on the invention and assigned to the Secretary of Agriculture for the free use of the people of the United States.[10] Pressurized by liquefied gas, which gave it propellant qualities, the small, portable can enabled soldiers to defend themselves against malaria-carrying mosquitoes by spraying inside tents and airplanes in the Pacific during World War II.[11] Goodhue and Sullivan received the first Erik Rotheim Gold Medal from the Federation of European Aerosol Associations on August 28, 1970, in Oslo, Norway in recognition of their early patents and subsequent pioneering work with aerosol sprays.

In 1948, three companies were granted licenses by the United States government to manufacture aerosol sprays. Two of the three companies, Chase Products Company and Claire Manufacturing, continue to manufacture aerosol sprays. The "crimp-on valve", used to control the spray in low-pressure aerosol sprays was developed in 1949 by Bronx machine shop proprietor Robert H. Abplanalp.[8][12]

In 1974, Drs. Frank Sherwood Rowland and Mario J. Molina proposed that chlorofluorocarbons, used as propellants in aerosol sprays, contributed to the depletion of Earth's ozone layer.[13] In response to this theory, the U.S. Congress passed amendments to the Clean Air Act in 1977 authorizing the Environmental Protection Agency to regulate the presence of CFCs in the atmosphere.[14] The United Nations Environment Programme called for ozone layer research that same year, and, in 1981, authorized a global framework convention on ozone layer protection.[15] In 1985, Joe Farman, Brian G. Gardiner, and Jon Shanklin published the first scientific paper detailing the hole in the ozone layer.[16] That same year, the Vienna Convention was signed in response to the UN's authorization. Two years later, the Montreal Protocol, which regulated the production of CFCs was formally signed. It came into effect in 1989.[15] The U.S. formally phased out CFCs in 1995.[17]

Aerosol propellants

See also: Propellant § Compressed_fluid_propellants

If aerosol cans were simply filled with compressed gas, it would either need to be at a dangerously high pressure and require special pressure vessel design (like in gas cylinders), or the amount of payload in the can would be small, and rapidly deplete. Usually, the gas is the vapor of a liquid with boiling point slightly lower than room temperature. This means that inside the pressurized can, the vapor can exist in equilibrium with its bulk liquid at a pressure that is higher than atmospheric pressure (and able to expel the payload), but not dangerously high. As gas escapes, it is immediately replaced by evaporating liquid. Since the propellant exists in liquid form in the can, it should be miscible with the payload or dissolved in the payload. In gas dusters and freeze sprays, the payload itself acts as the propellant. The propellant in a gas duster can is not "compressed air" as sometimes assumed, but usually a haloalkane.

Chlorofluorocarbons (CFCs) were once often used as propellants,[18] but since the Montreal Protocol came into force in 1989, they have been replaced in nearly every country due to the negative effects CFCs have on Earth's ozone layer. The most common replacements of CFCs are mixtures of volatile hydrocarbons, typically propane, n-butane and isobutane.[19] Dimethyl ether (DME) and methyl ethyl ether are also used. All these have the disadvantage of being flammable. Nitrous oxide and carbon dioxide are also used as propellants to deliver foodstuffs (for example, whipped cream and cooking spray). Medicinal aerosols such as asthma inhalers use hydrofluoroalkanes (HFA): either HFA 134a (1,1,1,2,-tetrafluoroethane) or HFA 227 (1,1,1,2,3,3,3-heptafluoropropane) or combinations of the two. More recently, liquid Hydrofluoroolefin (HFO) propellants have become more widely adopted in aerosol systems due to their relatively low vapor pressure, low global warming potential (GWP), and nonflammability.[20] Manual pump sprays can be used as an alternative to a stored propellant.

Liquid aerosol propellant filling machines require additional precautions, such as being mounted externally to the production warehouse in a gas house. Liquid aerosol propellant machines are typically constructed to comply with ATEX Zone II/2G regulations (classification Zone 1).[21]

Packaging

 
A typical paint valve system will have a "female" valve, the stem being part of the top actuator. The valve can be preassembled with the valve cup and installed on the can as one piece, prior to pressure-filling. The actuator is added later.

Modern aerosol spray products have three major parts: the can, the valve and the actuator or button. The can is most commonly lacquered tinplate (steel with a layer of tin) and may be made of two or three pieces of metal crimped together. Aluminium cans are also common and are generally used for products that are more expensive or intended to have a more premium appearance, such as personal care products. The valve is crimped to the inside rim of the can, and the design of this component is important in determining the spray rate. The actuator is depressed by the user to open the valve; a spring closes the valve again when it is released. The shape and size of the nozzle in the actuator controls the aerosolized particle size and the spread of the aerosol spray.[22]

Non-propellant packaging alternatives

Main articles: Spray bottle and Squeeze bottle

True aerosol sprays release their propellant during use.[2][3] Some non-propellant alternatives include various spray bottles, squeeze bottles, and Bag on Valve (BoV) or Bag in Can (BiC) compressed gas aerosol systems.

Packaging that uses a piston barrier system by CCL Industries or EarthSafe by Crown Holdings is often selected for highly viscous products such as post-foaming hair gels, thick creams and lotions, food spreads and industrial products and sealants. The main benefit of this system is that it eliminates gas permeation and assures separation of the product from the propellant, maintaining the purity and integrity of the formulation throughout its consumer lifespan. The piston barrier system also provides a consistent flow rate with minimal product retention.

Another type of dispensing system is the bag-in-can (or BOV, bag-on-valve technology) system where the product is separated from the pressurizing agent with a hermetically sealed, multi-layered laminated pouch, which maintains complete formulation integrity so only pure product is dispensed.[23] Among its many benefits, the bag-in-can system extends a product's shelf life, is suitable for all-attitude, (360-degree) dispensing, quiet and non-chilling discharge. One key performance difference relative to true aerosol systems is that traditional BoV dispensing pressures, BoVs pressurized solely by pressurized gas) drops as the product is dispensed. This bag-in-can system is used in the packaging of pharmaceutical, industrial, household, pet care and other products that require complete separation between the product and the propellant or require near complete evacuation of thin to viscous formulations.

A later development is the 2K (two component) aerosol spray, with a main component stored in a main chamber, and a second component stored in an accessory container. When an applicator activates the 2K aerosol by breaking the accessory container, the two components mix. The 2K aerosol can is advantageous for delivery of reactive mixtures; for example, a 2K reactive mixture can use low molecular weight monomer, oligomer, and functionalized low molecular polymer to make a final cross-linked high molecular weight polymer. A 2K aerosol can increase solid contents and deliver high-performance polymer products, such as curable paints, foams, and adhesives.

Safety concerns

 
Canned air / dusters do not contain air, and are dangerous, even deadly, to inhale.[24]

Aerosol cans have three main areas of health concern:

  • Contents may be deliberately inhaled to achieve intoxication from the propellant (known as inhalant abuse or "huffing"). Calling them "canned air" or "cans of compressed air" could mislead the ignorant to think they are harmless; in fact, such misuse has caused deaths.[24]
  • Aerosol burn injuries can be caused by the spraying of aerosol directly onto the skin, in a practice sometimes called "frosting".[25] Adiabatic expansion causes the aerosol contents to cool rapidly on exiting the can.
  • The propellants in aerosol cans are typically combinations of ignitable gases and have been known to cause fires and explosions.[26] However, non-flammable compressed gases such as nitrogen and nitrous oxide have been widely adopted into a number of aerosol systems such as air fresheners and aerosolized whipped cream, as have non-flammable liquid propellants.[27]
  • In later 2021 and through 2022, a large number of consumer aerosols were recalled due to the presence of Benzene in their finished products.[28] Where the recall was far reaching, Benzene is considered a trace contaminant in some but not all hydrocarbon propellants. Though rigorous testing at both the propellant manufacturer and the aerosol filling site, unsuitable aerosol propellants can be detected and destroyed prior to use in any finished products.

In the United States, non-empty aerosol cans are considered hazardous waste,[26] but are still considered "recyclable when empty" in US curbside recycling programs.[29]

See also

References

  1. ^ a b Bellis, Mary The History of Aerosol Spray Cans
  2. ^ a b Norwegian Patent No. 46613, issued on November 23, 1926
  3. ^ a b U.S. Patent 1,800,156 — Method and Means for the Atomizing or Distribution of Liquid or Semiliquid Materials, issued April 7, 1931
  4. ^ Kvilesjø, Svend Ole (17 February 2003). . Aftenposten (in Norwegian). Archived from the original on 30 June 2008. Retrieved 6 February 2009.
  5. ^ U.S. Patent 2,170,531 — Appratus for Mixing a Liquid With a Gas, granted August 22, 1939.
  6. ^ Carlisle, Rodney (2004). Scientific American Inventions and Discoveries, p.402. John Wiley & Songs, Inc., New Jersey. ISBN 0-471-24410-4.
  7. ^ U.S. Patent 2,331,117, filed October 3, 1941, and granted October 5, 1943. Patent No. 2,331,117 (Serial No. 413,474) for an aerosol "dispensing apparatus", filed by Lyle D. Goodhue and William N. Sullivan (including dispenser drawing)
  8. ^ a b Kimberley A. McGrath; Bridget E. Travers, eds. (1999). World of Invention "Summary". Detroit: Thomson Gale. ISBN 0-7876-2759-3.
  9. ^ Article “Aerosol Bomb”, by The Golden Home and High School Encyclopedia, Golden Press, New York, 1961.
  10. ^ Article "Aerosols and Insects", by W.N. Sullivan, "The Yearbook of Agriculture - Insects", United States Department of Agriculture, 1952
  11. ^ Core, Jim, Rosalie Marion Bliss, and Alfredo Flores. (September 2005) "ARS Partners With Defense Department To Protect Troops From Insect Vectors""ARS Partners With Defense Department To Protect Troops From Insect Vectors". Agricultural Research MagazineVol. 53, No. 9 . Archived from http://ars.usda.gov/is/ar/archive/sep05/vector0905.htm?pf=1.
  12. ^ U.S. Patent 2,631,814 — Valve Mechanism for Dispensing Gases and Liquids Under Pressure; application September 28, 1949, issued March 17, 1953
  13. ^ . Consumer Aerosol Products Council. Archived from the original on 2015-07-15. Retrieved 2015-07-20.
  14. ^ Clean Air Act Amendments of 1977 (91 Stat. 685, p. 726)
  15. ^ a b Weiss, Edith Brown (2009). "The Vienna Convention for the Protection of the Ozone Layer and the Montreal Protocol on Substances That Deplete the Ozone Layer" (PDF). United Nations Audiovisual Library of International Law. United Nations. Retrieved 20 July 2015.
  16. ^ Nash, Eric R. (23 September 2013). "History of the Ozone Hole". NASA Ozone Hole Watch. NASA. Retrieved 2015-07-20.
  17. ^ "The Accelerated Phaseout of Class I Ozone-Depleting Substances". United States Environmental Protection Agency. 19 August 2010. Retrieved 2015-07-20.
  18. ^ "Fires Halted Quickly by "Lazy" Freon Gas". Popular Mechanics. Vol. 87. Hearst Magazines. April 1947. p. 115. Retrieved June 7, 2019. Freon chemical compounds in household refrigerators, air-cooling systems and as a DDT carrier in aerosol insect bombs have been found to be more effective in extinguishing fires than carbon dioxide.
  19. ^ Yeoman, Amber M.; Lewis, Alastair C. (2021-04-22). "Global emissions of VOCs from compressed aerosol products". Elementa: Science of the Anthropocene. 9 (1): 00177. doi:10.1525/elementa.2020.20.00177. ISSN 2325-1026.
  20. ^ "Solstice® Propellant Technical Information" (PDF). Honeywell.
  21. ^ "Aerosol Propellant / Pressurisation Filling Machine - R + R Aerosol Systems Ltd". R + R Midlands Ltd. Retrieved 2019-02-19.
  22. ^ US5941462A, Sandor, "Variable spray nozzle for product sprayer", published 1999 
  23. ^ image: aerosol and bov pressurized containers, illustration
  24. ^ a b "Dust Off Death". snopes.com. Retrieved 2015-05-24.
  25. ^ "Deodorant burns on the increase". ABC News. 10 July 2007.
  26. ^ a b . uvm.edu. The University of Vermont. Archived from the original on 11 August 2015. Retrieved 20 July 2015.
  27. ^ "Solstice Propellant for Aerosols". Honeywell Aerosols. Retrieved 11 March 2019.
  28. ^ Genovese, Daniella (December 20, 2021). "P&G recalls over 30 aerosol spray products due to benzene". Fox Business.{{cite web}}: CS1 maint: url-status (link)
  29. ^ "How to Recycle Aerosol Cans". Earth911.

External links

 
Wikimedia Commons has media related to Spray cans.
  • Consumer Aerosol Products Council

March 20, 2023
aerosol, spray, dispenser, high, temperature, explosive, weapon, also, known, aerosol, bomb, thermobaric, weapon, aerosol, spray, type, dispensing, system, which, creates, aerosol, mist, liquid, particles, comprises, bottle, that, contains, payload, propellant. For the high temperature explosive weapon also known as an aerosol bomb see Thermobaric weapon Aerosol spray is a type of dispensing system which creates an aerosol mist of liquid particles It comprises a can or bottle that contains a payload and a propellant under pressure When the container s valve is opened the payload is forced out of a small opening and emerges as an aerosol or mist Aerosol spray can Contents 1 History 2 Aerosol propellants 3 Packaging 4 Non propellant packaging alternatives 5 Safety concerns 6 See also 7 References 8 External linksHistory Edit The aerosol spray canister invented by USDA researchers Lyle Goodhue and William Sullivan The concepts of aerosol probably go as far back as 1790 1 The first aerosol spray can patent was granted in Oslo in 1927 to Erik Rotheim a Norwegian chemical engineer 1 2 and a United States patent was granted for the invention in 1931 3 The patent rights were sold to a United States company for 100 000 Norwegian kroner 4 The Norwegian Postal Service Posten Norge celebrated the invention by issuing a stamp in 1998 In 1939 American Julian S Kahn received a patent for a disposable spray can 5 6 but the product remained largely undeveloped Kahn s idea was to mix cream and a propellant from two sources to make whipped cream at home not a true aerosol in that sense Moreover in 1949 he disclaimed his first four claims which were the foundation of his following patent claims It was not until 1941 that the aerosol spray can was first put to effective use by Americans Lyle Goodhue and William Sullivan of the United States Bureau of Entomology and Plant Quarantine who are credited as the inventors of the modern spray can 7 8 Their design of a refillable spray can dubbed the aerosol bomb or bug bomb is the ancestor of many commercial spray products It was a hand sized steel can charged with a liquefied gas under 75 pounds of pressure and a product to be expelled as a mist or a foam 9 A public service patent was issued on the invention and assigned to the Secretary of Agriculture for the free use of the people of the United States 10 Pressurized by liquefied gas which gave it propellant qualities the small portable can enabled soldiers to defend themselves against malaria carrying mosquitoes by spraying inside tents and airplanes in the Pacific during World War II 11 Goodhue and Sullivan received the first Erik Rotheim Gold Medal from the Federation of European Aerosol Associations on August 28 1970 in Oslo Norway in recognition of their early patents and subsequent pioneering work with aerosol sprays In 1948 three companies were granted licenses by the United States government to manufacture aerosol sprays Two of the three companies Chase Products Company and Claire Manufacturing continue to manufacture aerosol sprays The crimp on valve used to control the spray in low pressure aerosol sprays was developed in 1949 by Bronx machine shop proprietor Robert H Abplanalp 8 12 In 1974 Drs Frank Sherwood Rowland and Mario J Molina proposed that chlorofluorocarbons used as propellants in aerosol sprays contributed to the depletion of Earth s ozone layer 13 In response to this theory the U S Congress passed amendments to the Clean Air Act in 1977 authorizing the Environmental Protection Agency to regulate the presence of CFCs in the atmosphere 14 The United Nations Environment Programme called for ozone layer research that same year and in 1981 authorized a global framework convention on ozone layer protection 15 In 1985 Joe Farman Brian G Gardiner and Jon Shanklin published the first scientific paper detailing the hole in the ozone layer 16 That same year the Vienna Convention was signed in response to the UN s authorization Two years later the Montreal Protocol which regulated the production of CFCs was formally signed It came into effect in 1989 15 The U S formally phased out CFCs in 1995 17 Aerosol propellants EditSee also Propellant Compressed fluid propellants If aerosol cans were simply filled with compressed gas it would either need to be at a dangerously high pressure and require special pressure vessel design like in gas cylinders or the amount of payload in the can would be small and rapidly deplete Usually the gas is the vapor of a liquid with boiling point slightly lower than room temperature This means that inside the pressurized can the vapor can exist in equilibrium with its bulk liquid at a pressure that is higher than atmospheric pressure and able to expel the payload but not dangerously high As gas escapes it is immediately replaced by evaporating liquid Since the propellant exists in liquid form in the can it should be miscible with the payload or dissolved in the payload In gas dusters and freeze sprays the payload itself acts as the propellant The propellant in a gas duster can is not compressed air as sometimes assumed but usually a haloalkane Chlorofluorocarbons CFCs were once often used as propellants 18 but since the Montreal Protocol came into force in 1989 they have been replaced in nearly every country due to the negative effects CFCs have on Earth s ozone layer The most common replacements of CFCs are mixtures of volatile hydrocarbons typically propane n butane and isobutane 19 Dimethyl ether DME and methyl ethyl ether are also used All these have the disadvantage of being flammable Nitrous oxide and carbon dioxide are also used as propellants to deliver foodstuffs for example whipped cream and cooking spray Medicinal aerosols such as asthma inhalers use hydrofluoroalkanes HFA either HFA 134a 1 1 1 2 tetrafluoroethane or HFA 227 1 1 1 2 3 3 3 heptafluoropropane or combinations of the two More recently liquid Hydrofluoroolefin HFO propellants have become more widely adopted in aerosol systems due to their relatively low vapor pressure low global warming potential GWP and nonflammability 20 Manual pump sprays can be used as an alternative to a stored propellant Liquid aerosol propellant filling machines require additional precautions such as being mounted externally to the production warehouse in a gas house Liquid aerosol propellant machines are typically constructed to comply with ATEX Zone II 2G regulations classification Zone 1 21 Packaging Edit A typical paint valve system will have a female valve the stem being part of the top actuator The valve can be preassembled with the valve cup and installed on the can as one piece prior to pressure filling The actuator is added later Modern aerosol spray products have three major parts the can the valve and the actuator or button The can is most commonly lacquered tinplate steel with a layer of tin and may be made of two or three pieces of metal crimped together Aluminium cans are also common and are generally used for products that are more expensive or intended to have a more premium appearance such as personal care products The valve is crimped to the inside rim of the can and the design of this component is important in determining the spray rate The actuator is depressed by the user to open the valve a spring closes the valve again when it is released The shape and size of the nozzle in the actuator controls the aerosolized particle size and the spread of the aerosol spray 22 Non propellant packaging alternatives EditMain articles Spray bottle and Squeeze bottle True aerosol sprays release their propellant during use 2 3 Some non propellant alternatives include various spray bottles squeeze bottles and Bag on Valve BoV or Bag in Can BiC compressed gas aerosol systems Packaging that uses a piston barrier system by CCL Industries or EarthSafe by Crown Holdings is often selected for highly viscous products such as post foaming hair gels thick creams and lotions food spreads and industrial products and sealants The main benefit of this system is that it eliminates gas permeation and assures separation of the product from the propellant maintaining the purity and integrity of the formulation throughout its consumer lifespan The piston barrier system also provides a consistent flow rate with minimal product retention Another type of dispensing system is the bag in can or BOV bag on valve technology system where the product is separated from the pressurizing agent with a hermetically sealed multi layered laminated pouch which maintains complete formulation integrity so only pure product is dispensed 23 Among its many benefits the bag in can system extends a product s shelf life is suitable for all attitude 360 degree dispensing quiet and non chilling discharge One key performance difference relative to true aerosol systems is that traditional BoV dispensing pressures BoVs pressurized solely by pressurized gas drops as the product is dispensed This bag in can system is used in the packaging of pharmaceutical industrial household pet care and other products that require complete separation between the product and the propellant or require near complete evacuation of thin to viscous formulations A later development is the 2K two component aerosol spray with a main component stored in a main chamber and a second component stored in an accessory container When an applicator activates the 2K aerosol by breaking the accessory container the two components mix The 2K aerosol can is advantageous for delivery of reactive mixtures for example a 2K reactive mixture can use low molecular weight monomer oligomer and functionalized low molecular polymer to make a final cross linked high molecular weight polymer A 2K aerosol can increase solid contents and deliver high performance polymer products such as curable paints foams and adhesives Safety concerns Edit Canned air dusters do not contain air and are dangerous even deadly to inhale 24 Aerosol cans have three main areas of health concern Contents may be deliberately inhaled to achieve intoxication from the propellant known as inhalant abuse or huffing Calling them canned air or cans of compressed air could mislead the ignorant to think they are harmless in fact such misuse has caused deaths 24 Aerosol burn injuries can be caused by the spraying of aerosol directly onto the skin in a practice sometimes called frosting 25 Adiabatic expansion causes the aerosol contents to cool rapidly on exiting the can The propellants in aerosol cans are typically combinations of ignitable gases and have been known to cause fires and explosions 26 However non flammable compressed gases such as nitrogen and nitrous oxide have been widely adopted into a number of aerosol systems such as air fresheners and aerosolized whipped cream as have non flammable liquid propellants 27 In later 2021 and through 2022 a large number of consumer aerosols were recalled due to the presence of Benzene in their finished products 28 Where the recall was far reaching Benzene is considered a trace contaminant in some but not all hydrocarbon propellants Though rigorous testing at both the propellant manufacturer and the aerosol filling site unsuitable aerosol propellants can be detected and destroyed prior to use in any finished products In the United States non empty aerosol cans are considered hazardous waste 26 but are still considered recyclable when empty in US curbside recycling programs 29 See also EditAerosol paint Fabrican Graffiti Silly String Spray nozzleReferences Edit a b Bellis Mary The History of Aerosol Spray Cans a b Norwegian Patent No 46613 issued on November 23 1926 a b U S Patent 1 800 156 Method and Means for the Atomizing or Distribution of Liquid or Semiliquid Materials issued April 7 1931 Kvilesjo Svend Ole 17 February 2003 Sprayboksens far er norsk Aftenposten in Norwegian Archived from the original on 30 June 2008 Retrieved 6 February 2009 Sprayboksens far er norsk Erik Rotheim fant opp aerosolflasken sprayboksen pa 1920 tallet I 1927 tok han patent pa oppfinnelsen og patentet ble etterhvert solgt til et amerikansk selskap for 100 000 kroner The Father of the Spraybox is Norwegian Erik Rotheim invented the aerosol bottle the spray box in the 1920s In 1927 he patented the invention the patent was eventually sold to a US company for NOK 100 000 U S Patent 2 170 531 Appratus for Mixing a Liquid With a Gas granted August 22 1939 Carlisle Rodney 2004 Scientific American Inventions and Discoveries p 402 John Wiley amp Songs Inc New Jersey ISBN 0 471 24410 4 U S Patent 2 331 117 filed October 3 1941 and granted October 5 1943 Patent No 2 331 117 Serial No 413 474 for an aerosol dispensing apparatus filed by Lyle D Goodhue and William N Sullivan including dispenser drawing a b Kimberley A McGrath Bridget E Travers eds 1999 World of Invention Summary Detroit Thomson Gale ISBN 0 7876 2759 3 Article Aerosol Bomb by The Golden Home and High School Encyclopedia Golden Press New York 1961 Article Aerosols and Insects by W N Sullivan The Yearbook of Agriculture Insects United States Department of Agriculture 1952 Core Jim Rosalie Marion Bliss and Alfredo Flores September 2005 ARS Partners With Defense Department To Protect Troops From Insect Vectors ARS Partners With Defense Department To Protect Troops From Insect Vectors Agricultural Research MagazineVol 53 No 9 Archived from http ars usda gov is ar archive sep05 vector0905 htm pf 1 U S Patent 2 631 814 Valve Mechanism for Dispensing Gases and Liquids Under Pressure application September 28 1949 issued March 17 1953 Chloroflurocarbons CFCs History Consumer Aerosol Products Council Archived from the original on 2015 07 15 Retrieved 2015 07 20 Clean Air Act Amendments of 1977 91 Stat 685 p 726 a b Weiss Edith Brown 2009 The Vienna Convention for the Protection of the Ozone Layer and the Montreal Protocol on Substances That Deplete the Ozone Layer PDF United Nations Audiovisual Library of International Law United Nations Retrieved 20 July 2015 Nash Eric R 23 September 2013 History of the Ozone Hole NASA Ozone Hole Watch NASA Retrieved 2015 07 20 The Accelerated Phaseout of Class I Ozone Depleting Substances United States Environmental Protection Agency 19 August 2010 Retrieved 2015 07 20 Fires Halted Quickly by Lazy Freon Gas Popular Mechanics Vol 87 Hearst Magazines April 1947 p 115 Retrieved June 7 2019 Freon chemical compounds in household refrigerators air cooling systems and as a DDT carrier in aerosol insect bombs have been found to be more effective in extinguishing fires than carbon dioxide Yeoman Amber M Lewis Alastair C 2021 04 22 Global emissions of VOCs from compressed aerosol products Elementa Science of the Anthropocene 9 1 00177 doi 10 1525 elementa 2020 20 00177 ISSN 2325 1026 Solstice Propellant Technical Information PDF Honeywell Aerosol Propellant Pressurisation Filling Machine R R Aerosol Systems Ltd R R Midlands Ltd Retrieved 2019 02 19 US5941462A Sandor Variable spray nozzle for product sprayer published 1999 image aerosol and bov pressurized containers illustration a b Dust Off Death snopes com Retrieved 2015 05 24 Deodorant burns on the increase ABC News 10 July 2007 a b Paint amp Aerosol Safety uvm edu The University of Vermont Archived from the original on 11 August 2015 Retrieved 20 July 2015 Solstice Propellant for Aerosols Honeywell Aerosols Retrieved 11 March 2019 Genovese Daniella December 20 2021 P amp G recalls over 30 aerosol spray products due to benzene Fox Business a href Template Cite web html title Template Cite web cite web a CS1 maint url status link How to Recycle Aerosol Cans Earth911 External links Edit Wikimedia Commons has media related to Spray cans Consumer Aerosol Products Council Aerosol Spray Can Old Patents and Inventions Retrieved from https en wikipedia org w index php title Aerosol spray dispenser amp oldid 1128978910, wikipedia, wiki, book, books, library,

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