US20050145711A1 - Air-freshening device - Google Patents

Air-freshening device Download PDF

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Publication number
US20050145711A1
US20050145711A1 US10/505,819 US50581905A US2005145711A1 US 20050145711 A1 US20050145711 A1 US 20050145711A1 US 50581905 A US50581905 A US 50581905A US 2005145711 A1 US2005145711 A1 US 2005145711A1
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United States
Prior art keywords
air
fragrance
freshening device
composition
film
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Abandoned
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US10/505,819
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English (en)
Inventor
Philippe Blondeau
Christian Quellet
Sandrine Dumas Krikorian
Sebastien Picci
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Givaudan SA
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Individual
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Assigned to GIVAUDAN SA reassignment GIVAUDAN SA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BLONDEAU, PHILIPPE, DUMAS KRIKORIAN, SANDRINE, PICCI, SEBASTIEN, QUELLET, CHRISTIAN
Publication of US20050145711A1 publication Critical patent/US20050145711A1/en
Abandoned legal-status Critical Current

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    • 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
    • A61L9/04—Disinfection, sterilisation or deodorisation of air using gaseous or vaporous substances, e.g. ozone using substances evaporated in the air without heating
    • A61L9/12—Apparatus, e.g. holders, therefor
    • 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
    • A61L9/01—Deodorant compositions

Definitions

  • the invention relates to a fragrance composition for the controlled release of volatile substances into the ambient air, and to air-freshening devices containing the same.
  • fragrance release systems which provide a pleasant, natural aroma during a long period of time, e.g. 4 to 6 weeks, without significant changes of the fragrance strength and/or fragrance character during usage.
  • Gel compositions to control the degree of fragrance release from air-freshening devices are known.
  • One of the first gels has been made from seaweed extracts, e.g. carrageenan.
  • these gels can hold only a relatively small concentration of fragrance oils and have poor fragrance-release characteristics.
  • the European Patent Application No. 0 631 788 discloses a gel-like fragrance composition which comprises an aqueous gel comprising an aqueous fluid and a gelling agent incorporated in an oil-absorbable resin carrying a fragrant material. It is stated therein that it is possible to achieve a well-balanced volatile emission for a long period, independently of the perfume character.
  • These aqueous gel compositions may contain up to 20% by weight of a fragrant material.
  • U.S. Pat. No. 5,643,866 discloses a crystal clear, self-supporting, highly concentrated gel, comprising fragrance oils, glycols and dibenzylidene sorbitol acetal (DBSA) as gelling agent. Said gels can be loaded up to 80% with fragrance oils.
  • U.S. Pat. No. 5,780,527 discloses a rigid dry and transparent gel obtained by reacting, in the presence of a fragrance composition, a liquid polymeric material with a cross-linking agent.
  • Non-gel like fragrance compositions are widespread in combination with electrical heated vapour dispensing devices, or in combination with other means, e.g. a wick, to control the release of the fragrance.
  • a solvent is used to support the controlled release of the fragrance.
  • the European Patent Application No. 1 078 640 describes a single-phase aqueous air freshening composition comprising 30% to 60% glycol ethers used in an air freshener device comprising a wick.
  • the invention provides an air-freshening device comprising a container having an open end, the container holding a composition comprising an aqueous phase, and a hydrophobic phase comprising a fragrance, and said open end is covered by a breathable film which permits of egress of the fragrance and water-vapour.
  • the addition of water to a fragrance not only influences the life-cycle of the air-freshening device but also is important for the essentially continuous release of the fragrance.
  • the air-freshener device permits of strong fragrance release and the character of the released fragrance does not substantially alter over a long period of time, e.g. 4 to 6 weeks.
  • the present of water influences the impact and quality of the released fragrance and leads to higher evaporation profile measured by the weight lost of the product over a time period of use as is more specifically illustrated in the examples.
  • the rate of evaporation and therefore the life-cycle of the air-freshening device may be varied depending on the ratio of water to fragrance.
  • the weight ratio between water to fragrance is about 9:1 to about 1:9, more preferably about 7:3 to about 3:7, most preferably 4:1 to about 2:3.
  • the strength of a fragrance can be evaluated by the measurement of the odour value, or by sniffing.
  • the odour value of a fragrance material is defined as the ratio of the vapour pressure and its mean odour threshold concentration.
  • the odour threshold concentration can be measured by standard methods, for example described by ASTM E679-91. To calculate the odour value of a fragrance composition the vapour pressure and odour threshold concentration of the fragrance has to be determined. Because of the time-consuming and elaborate nature of methods to determine the odour value the analysis of the fragrance strength by sniffing is preferred, as is well known in the perfumery arts.
  • the character of a fragrance relies on the contribution of all components of a fragrance through evaporation. Highly volatile fragrance components (so-called Top Notes ) are responsible for the initial impression of a fragrance. Less volatile fragrance components (so-called Middle Notes , also known as Heart Notes , and so-called Bottom Notes , also known as Base Notes ) are responsible for the long-lasting impression of a fragrance.
  • a fragrance's character depends on the harmonisation of Top Note, Middle Note, and Bottom Note. Clearly, it is highly desired that the released fragrance character does not significantly change during use of an air-freshening device over a prolonged period of time.
  • the air-freshener devices of the present invention may permit substantially the same ease of passage to all fragrance ingredients irrespective of their physicochemical properties such as volatility and thus leads to the balanced nature of the fragrance emitted from the device. Without wishing to be bound by any theory applicant believes that due to the addition of water to the fragrance the developed water-vapour in a headspace of the device acts as a carrier for the fragrance to pass through the breathable film irrespective of their volatility.
  • breathable film means a polymeric film that allows water-vapour, but not water in the liquid phase, to pass through it.
  • breathable films There are two different classes of breathable films known namely micro-porous films and monolithic films.
  • Micro-porous films are such films with small pores that permit passage of water-vapour. Typically, they comprises micropores having pore sizes of e.g. down to about 10 ⁇ m. The small size of the pores prevents the penetration of liquid phase water across the film, but the interconnected pore structure allows the transmission of water-vapour.
  • Micro-porous films may be made from, e.g. polyolefins, polytetrafluoroethylenes (PTFE) and precipitated polyurethanes.
  • Monolithic films are based on copolymers having so called hard and soft segments.
  • the hard segments may be polyesters, for example glycol, propanediol or butanediol units and dicarboxylic acid units connected by ester functional groups; polyurethanes; or polyamides, for example polyamid 6 (PA-6), polyamid 11 (PA-11), or polyamid 12 (PA-12).
  • the soft segments responsible for the water-vapour transmission, may be formed by polyether units, for example polyethylene glycol (PEG), polypropylene glycol (PPG) or polytetramethylene glycol (PTMG) or mixtures thereof, and dicarboxylic acids, such as, for example terephtalic acid.
  • Monolithic films based on polyester block hard segments are described in U.S. Pat. Nos. No. 5,800,928, 4,725,481, and 6,001,464; Monolithic films based on polyurethane hard segments are described in U.S. Pat. Nos. 5,800,928 and 6,001,464; Monolithic films based on polyamide hard segments are described in U.S. Pat. Nos. 5,800,928 and 5,506,024; all of which are incorporated herein by reference.
  • the molecular weight of the soft segment is preferably between 600 and 4000 g/mol.
  • the glass transition temperature is preferably below 0° C.
  • the amount of the soft segment may vary widely depending on the particular properties desired. However, in a preferred embodiment the amount of the soft segment may be between 15% and 40% by weight of the film, preferably between 20% and 30% by weight.
  • the soft segment formed by polypropylene glycol is preferred. Most preferred are soft segments formed by polyethylene glycol, or a mixture of polyethylene glycol and polypropylene glycol.
  • monolithic breathable films examples include poly(ether-co-amide), e.g. PEBAX® by Atofina and poly(ether-co-ester), e.g. HYTREL®60 by DuPont.
  • breathability is meant the water-vapour transmission rate (WVT) or water-vapour permeability (WVP).
  • WVT water-vapour transmission rate
  • WVP water-vapour permeability
  • ASTM E96 and DIN 53 122 A variety of test methods have been developed to measure this property, for example ASTM E96 and DIN 53 122. Although most standard methods are of similar concept there are variables, e.g. temperature and relative humidity of the test environment, the principle of the test method, i.e. upright dish water method, upright dish desiccant method, inverted cup method, and inverted water method, that have an influence on the calculated water-vapour transmission rate. Consequently, the results from different methods are not directly comparable.
  • the breathable film according to the present invention preferably may have a thickness from about 10 ⁇ m to about 50 ⁇ m more preferred from 15 ⁇ m to about 40 ⁇ m.
  • the container according to the present invention may be made of any material that is commonly used for air-freshener devices, e.g. glass or plastic. Such materials are preferred, which are stable in the presence of fragrance materials, e.g. essential oils.
  • the container may be of any shape or configuration subject to it having an open end and capable of receiving aqueous and oil phases.
  • the upper liquid surface does not abut the surface of the breathable film. Rather, in a preferred embodiment there should be a space between the upper surface of the liquid phase and the lower surface of the breathable film in which a head-space of fragrance and water-vapour may develop. This space is preferably not greater than 8 cm, more preferably not greater than 3 cm, for example between 1 cm and 2 cm, most preferably not greater than 1 cm.
  • the breathable film may be attached to the container in a sealed relationship utilising any conventional means, such as an adhesive, heat seal or the like. Such means are preferred which form a strong bond between the film and the container to avoid the leakage of the liquid composition.
  • the hydrophobic phase according to the present invention consists of fragrance.
  • a fragrance according to the present invention is a mixture of fragrance materials selected from such classes as acids, esters, alcohols, aldehydes, ketones, lactones, nitriles, ethers, acetates, hydrocarbons, sulfur- nitrogen- and oxygen-containing heterocyclic, polycyclic and macrocyclic compounds, as well essential oils of natural or synthetic origin.
  • fragrance materials are described, for example, in S. Arctander Perfume Flavors and Chemicals Vols. 1 and 2, Arctander, Montclair, N.J. USA 1969.
  • the fragrance optionally may comprise odourless liquids such as dipropylene glycol, propylene glycol, diethylphtalate, benzyl benzoate, triethylcitrate, isopropylmyristate, carbitol, and hexylene glycol, or mixtures thereof.
  • odourless liquids such as dipropylene glycol, propylene glycol, diethylphtalate, benzyl benzoate, triethylcitrate, isopropylmyristate, carbitol, and hexylene glycol, or mixtures thereof.
  • the fragrance comprises not more than 20% by weight of these liquids.
  • a fragrance may contain residual water either due to the presence of a solvent or due to the production process.
  • composition according to the present invention comprises more than 10% by weight of water, more preferably more than 25% by weight, most preferably between 50% and 90% by weight of water.
  • a composition comprising 95% by weight of water or even more, e.g. 98%, may also be used to form a composition according to the present invention.
  • the hydrophobic phase may comprise a lipophilic dye, for example Puricolor® blue FBL5, Puricolor® blue ABL9, Puricolor® green U3 or Puricolor® yellow AYE23 from Ciba.
  • a lipophilic dye for example Puricolor® blue FBL5, Puricolor® blue ABL9, Puricolor® green U3 or Puricolor® yellow AYE23 from Ciba.
  • fragrances are preferred comprising a high amount of fragrance material having a vapour pressure greater than 1000 ⁇ g/l.
  • fragrance materials are classified as Top Notes and may be selected from acetate C6 hexylic, acetophenone, alcohol C6 hexylic, aldehyde C7 heptylic, aldehyde C9 isononylic, allyl caproate, allyl oenanthate, amyl butyrate, amyl vinyl carbinol, anapear, benzaldehyde, benzyl formate, benzyl methyl ether, bornyl acetate liquid, butyl acetate, camphene, carbitol, citronellal, cresyl methyl ether para, cyclal C, cymene para, decenal-4-trans, delta-3 carene, diethyl malonate, dihydro anethole, dihydro myrcenol,
  • Fragrance materials having a vapour pressure between 10 ⁇ l/l and 1000 ⁇ g/l are classified as Middle Notes and may be selected from acetal E, acetal R, acetanisole, adoxal, agrumex, alcohol C10 decylic, alcohol C11 undecylenic, alcohol C12 lauric, alcohol C8 octylic, alcohol C9 nonylic, aldehyde C11 undecylenic, aldehyde C11 undecylic, aldehyde C12 lauric, aldehy, aldehyde iso C11, allyl amyl glycolate, allyl cyclohexyl propionate, ambrinol, amyl benzoate, amyl caproate, amyl cinnamic aldehyde, amyl phenyl acetate, amyl salicylate, anethole synthetic, anisyl acetate, anisyl alcohol, anther,
  • Fragrance materials having a vapour pressure below 10 ⁇ g/l are classified as Bottom Notes and may be selected from 2-benzyl-4-methanol-1,3-dioxolane, aldrone, ambrettolide, ambroxan, benzophenone, benzyl benzoate, benzyl cinnamate, benzyl phenyl acetate, cepionate, cetalox, citronellyl ethoxalate, civettone, cresyl caprylate para, cresyl phenyl acetate para, cyclohexal, diethyl phthalate, dione, dodecalactone delta, dodecalactone gamma, ethyl maltol, ethyl vanillin, ethylene brassylate, eugenyl phenyl acetate, evernyl, fixolide, florhydral, galaxolide, geranyl phenyl acetate,
  • fragrances are preferred comprising from about 15% to about 80% by weight Top Notes , more preferably from about 25% to about 60% by weight.
  • the aqueous phase according to the present invention may be water, for example distilled water.
  • Other excipients optionally present in the aqueous phase are salts, for example sodium chloride and magnesium sulfate to minimize the migration of water soluble fragrance materials.
  • Other excipients, e.g. water soluble dyes may also be present in the aqueous phase.
  • the device may have fitted over the container and the breathable film, a non-breathable material, such as an aluminium foil, polyolefine films, ethylene acrylic acid copolymer films, polyethylene terephtalate films, or ethylen vinyl acetate films, which may be easily removed prior to use.
  • a non-breathable material such as an aluminium foil, polyolefine films, ethylene acrylic acid copolymer films, polyethylene terephtalate films, or ethylen vinyl acetate films, which may be easily removed prior to use.
  • the composition held in the container comprises an upper hydrophobic phase comprising a fragrance, and a lower aqueous phase.
  • composition comprising the hydrophobic phase and the aqueous phase is provided as an emulsion.
  • the emulsion may optionally comprise a surfactant such as for example non-ionic surfactants, e.g. Neodol 91-8 from Shell Chemicals and Cremophor RH40 from BASF.
  • a surfactant such as for example non-ionic surfactants, e.g. Neodol 91-8 from Shell Chemicals and Cremophor RH40 from BASF.
  • fragrance compositions may comprise excipients such as dyes and UV-absorbers.
  • the container may be filled in a first step with the aqueous phase followed by adding on top of the aqueous phase the hydrophobic phase. If the hydrophobic phase and the aqueous phase is provided as an emulsion, in a first step both phases may be prepared separately and then mixed together to form an emulsion, according to a process well known in the art, followed by filling the resulting emulsion into the container. After filling the container the open end of the container is covered by the breathable film, which itself might be covered by a removable impermeable film for storage.
  • a fragrance composition having citrus and spicy top notes with floral and middle notes and ambery and musky bottom notes was used in all examples.
  • Comparative Product A Liquid Fragrance Composition Comprising a Cellulose Wick
  • Blend under stirring at room temperature 8.0 g fragrance and 8.0 g of Neodol (manufactured by Shell). Then, add 34 g water, 25 g dipropyleneglycolmethyleter, and 25 g ethyl alcohol. Stir until the solution becomes clear. Pour 70 g of the solution into a glass container and insert a wick, made of cellulose in the middle of the container. The one end of the wick is in contact with the solution and the other end of it is in contact with the ambient air to supply the ambient air with fragrance.
  • Comparative Product B Solid Gel Fragrance Composition Comprising a Gelling Agent
  • Product A, B, and C were evaluated in booths.
  • the fragrance strength of Product C is at all stages better than the fragrance strength of the comparison products, i.e. the wick system (Comp. Product A) permits at each age of the product only a weak egress of the fragrance and the gel system (Comp. Product B) releases a strong fragrance up to one week but the strength of the fragrance decreases over the period of time and was described to be weak after 4 weeks.
  • the concentration of the Top Notes decreases markedly for the comparative products, i.e. the wick system (Product A) and the gel system (Product B), whereas the concentration of the Top Notes remains very high for Product C during the evaluation period of 4 weeks.
  • Mixture A, B, C and D were evaluated by an expert panel in terms of strength and quality and resulted in the following ranking: Mixture D was better than Mixture C and Mixture C was better than Mixture B. The weakest was mixture A. If no water is added, Mixture A, the fragrance performance is very weak.

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  • Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Epidemiology (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Fats And Perfumes (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Treatment Of Sludge (AREA)
  • Treating Waste Gases (AREA)
  • Sampling And Sample Adjustment (AREA)
US10/505,819 2002-02-28 2003-01-30 Air-freshening device Abandoned US20050145711A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP02004584A EP1340513A1 (en) 2002-02-28 2002-02-28 Air-freshening device
EP02004584.5 2002-02-28
PCT/CH2003/000076 WO2003072151A1 (en) 2002-02-28 2003-01-30 Air-freshening device

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EP (2) EP1340513A1 (enExample)
JP (1) JP2005518840A (enExample)
KR (1) KR20040088553A (enExample)
AT (1) ATE347384T1 (enExample)
AU (1) AU2003201603A1 (enExample)
DE (1) DE60310204D1 (enExample)
WO (1) WO2003072151A1 (enExample)

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US7188780B2 (en) 2004-06-30 2007-03-13 S.C. Johnson & Son, Inc. Volatile material expiration indicating system
US20070083999A1 (en) * 2005-10-13 2007-04-19 Leskowicz James J Deodorizing compositions
US20070083998A1 (en) * 2005-10-13 2007-04-19 Leskowicz James J Deodorizing compositions
US7213770B2 (en) 2004-06-30 2007-05-08 S. C. Johnson & Son, Inc. Volatile material dispensing system
US7426799B2 (en) 2004-06-30 2008-09-23 S.C. Johnson & Son, Inc. Air freshener with frame and refill holder
US7441360B2 (en) 2004-06-30 2008-10-28 S.C. Johnson & Son, Inc. Air freshener with picture frame
US7523577B2 (en) 2006-04-03 2009-04-28 S.C. Johnson & Son, Inc. Air freshener with holder
US7607250B2 (en) 2004-06-30 2009-10-27 S.C. Johnson & Son, Inc. Air freshener with picture frame
US7665238B2 (en) 2006-04-03 2010-02-23 S.C. Johnson & Son, Inc. Air freshener with holder
US7926735B1 (en) * 2008-03-09 2011-04-19 Mobley David D Fragrance package, dispenser, and method
US8927474B2 (en) 2012-03-16 2015-01-06 S.C. Johnson & Son, Inc. Compressed gas aerosol composition in steel can
US9044414B2 (en) 2008-06-13 2015-06-02 S.C. Johnson & Son, Inc. Compositions containing a solvated active agent for dispensing as a gas aerosol
US20160000958A1 (en) * 2013-02-20 2016-01-07 Carlos Jose Duarte Matias A dispensing unit
US20190177653A1 (en) * 2016-06-08 2019-06-13 Takasago International Corporation Fragrance material
US10960097B2 (en) * 2015-03-19 2021-03-30 S. C. Johnson & Son, Inc. Composite membrane
US20210236678A1 (en) * 2016-02-24 2021-08-05 Takasago International Corporation Household product delivering warming and/or tingling sensations
US12319899B1 (en) * 2022-09-06 2025-06-03 Robert Dale Beverage additive

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GB0307767D0 (en) * 2003-04-04 2003-05-07 Mcbride Robert Ltd A dispenser
US8191796B2 (en) * 2007-02-28 2012-06-05 Symrise Ag Fragrance dispenser
JP6118117B2 (ja) * 2013-01-18 2017-04-19 株式会社東京技研 芳香具及び芳香具の製造方法
GB201310108D0 (en) * 2013-06-06 2013-07-24 Reckitt Benckiser Brands Ltd Fragrancing composition
JP6869190B2 (ja) * 2015-05-13 2021-05-12 ジボダン エス エー 有機化合物における改善または有機化合物に関する改善
US20230044427A1 (en) 2020-01-20 2023-02-09 Basf Se Evaporation retardant membrane for odorant compositions
DE202022100955U1 (de) 2022-02-18 2022-03-17 Dopefibers Gmbh Nachhaltiger Lufterfrischer mit langanhaltender Duftwirkung

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Cited By (23)

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AU2003201603A1 (en) 2003-09-09
EP1478410B1 (en) 2006-12-06
EP1340513A1 (en) 2003-09-03
DE60310204D1 (de) 2007-01-18
ATE347384T1 (de) 2006-12-15
KR20040088553A (ko) 2004-10-16
EP1478410A1 (en) 2004-11-24
WO2003072151A1 (en) 2003-09-04
JP2005518840A (ja) 2005-06-30

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