Classifications

• • 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
• • 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
  • A61L9/012—Deodorant compositions characterised by being in a special form, e.g. gels, emulsions
• • 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
  • A61L9/14—Disinfection, sterilisation or deodorisation of air using sprayed or atomised substances including air-liquid contact processes

Definitions

• Fragrance composition to be distributed by an aerosol generator
• the present invention relates to fragrance compositions for distribution by an aerosol generator.
• the perfumer should ensure that the correct balance of volatile "Top Notes” and less volatile “Bottom Notes” are presented in the vapour phase over the lifetime of a product. Accordingly, the perfumer must consider the vastly different evaporation rates of fragrance ingredients used to make up fragrance compositions.
• One method employed by perfumers to ensure that sufficient Bottom Notes are expressed in the vapour phase is to overdose on the Bottom Notes and also to use solvents to help lift the Bottom Notes into the vapour phase in order to blend with the Top Notes and achieve a balanced fragrance accord.
• Aerosol generators offer an advantage over the "classical technologies" in that they are adapted to positively express both Top Notes and the less volatile Bottom Notes into the vapour phase. Essentially aerosol generators take the consideration of different evaporation rates of fragrance ingredients out of the equation when designing fragrance accords. However, the use of aerosol generators may create additional problems for the • perfumer . Firstly, fragrance compositions created for "classical technologies" may not be suitable for dispensing from aerosols because the optimal balance of Top and Bottom Notes taking into account the evaporation behaviour of the components, may be distorted and result in an unacceptable fragrance accord heavy in Bottom Notes.
• a fragrance composition comprising 30% by weight or more of odour class A components may be dispensed by an aerosol generator, wherein said odour class A components are characterised by a Sensory Threshold Concentration that is 1 ng/1 or higher and a vapour pressure that is 10 ⁇ g/1 or higher .
• the invention therefore provides in a first aspect a fragrance composition comprising 30% by weight or more of odour class A components wherein said components are characterised by a Sensory Threshold Concentration that is
• the present invention refers to fragrance compositions comprising in addition up to 70% by weight of odour class B components .
• Components of an odour class B have a Sensory Threshold Concentration smaller than 1 ng/1, and a vapour pressure smaller than 10 ⁇ g/1.
• the Sensory Threshold Concentration is defined as the concentration of an odorous material for which the probability of detection of the stimulus is 0.5 (that is 50% above chance, by a given individual, under the condition of the test)
• the Sensory Threshold Concentration can be measured by standard methods, for example described in ASTM E1432-91 and is measured either by olfactometry means or by using sniff-bottles allowing panellists to smell the presented headspace. It is also possible to smell the presented odour in a sequential process.
• Certain natural fragrant raw materials such as essential oils, resinoids, and absolutes generally comprise several components. Whether said fragrant raw material belongs to the odour class A or odour class B is determined by analysis of the five components present in the highest concentration. From these five components the sensory threshold concentration and the vapour pressure has to be determined. If all five components taken alone are in one odour class then the fragrant raw material is classified in the same class.
• lavender oil i.e.
• Lavendin essence grosso the five components present in the highest concentration are linalyl acetate (about 34.4% wt) , linalool (about 29.3%wt), campher (about 7.5%wt), eucalyptol (about 5.2%wt) and terpinen-4-ol (about 2.3%wt). All five components fall within the definition of the odour class A.
• lavender oil an essential oil belongs according to the definition of the present invention to components of the odour class A.
• fragrance compositions according to the present invention meet all requirements concerning viscosity, necessary for the filling and dispensing from aerosol generators. Furthermore, the time-consuming iterative process of carrying out a large number of assays to obtain the desired viscosity of a fragrance composition by adding a solvent or carrier fluid without changing its odour impact is rendered unnecessary. This constitutes a great advantage of the present invention.
• the fragrance composition according to the present invention may be formulated on the basis of its desired odour and not on any viscosity considerations, which is an advantage for perfumers and manufacturers of products containing said fragrance compositions.
• the presence of 30% wt or more of components of the odour class A in a fragrance composition according to the present invention ensures good sprayability of the fragrance composition even if other components, such as components of the odour class B are present.
• the fragrance composition of the present invention comprises at least 50%, preferably 75% by weight of the components of the odour class A and up to 50% by weight, most preferably up to 25% of the components of the odour class B.
• Components of the odour class A are preferably selected from the group of allylamylglycolate, allyl caproate, alpha pinene, beta pinene, terpineol, alpha terpineol, amyl acetate, benzyl acetate, benzyl methyl ether, borneol, butyl butyrate, cis-3-hexenol, cis-3- hexenylacetate, citronellal, citronellol, citronellyl acetate, ethyl isobutyrate, cyclal C, lemarome, ethyl butyrate, fructone, ethyl caprylate, hexyl acetate, linalool, linalyl acetate, diethyl maleate, limonene, phenyl propyl alcohol, tetrahydrolinalol, gardenol, styrallyl acetate
• Components of the odour class B are preferably selected from the group of hedione, methyl octine carbonate, damascenone, damascone delta, damascone alpha, undecatriene, ambrettolide, ambroxan, ambrofix, ambrettone, vanilline, ethyl vanilline, eugenol, evernyl, cashmeran, ethylene brassylate, galaxolide, fixolide, tonalide, crysolide, celestolide, bacdanol and cedryl acetate .
• At least one component of the odour class A or one component of the odour class B is a fragrance raw material of natural origin, i.e. which is not obtained synthetically.
• Fragrance raw materials of natural origin are well known for the person skilled in the art and may be selected from the list of ambrette seed absolute, anise oil, artemisia oil, basil oil, bay oil, bensoin siam resinoid, bergamot oil, birch tar oil, calamus oil, cassia oil, cedarwood oil, cinnamon bark oil, citronella oil, civet absolute, clove oil, cumin oil, cypress oil, dill weed oil, elemi resinoid, estragon oil, eucalyptus oil, fennel oil, galbanum resinoid, ginger oil, grapefruit oil, hyacinth absolute, jasmine absolute, lavender oil, lemon oil, cubeba oil, nutmeg oil, marjoram oil, mandarin oil, mimosa concrete, neroli oil, oakmoss resinoid, olibanum resinoid, orange oil, origanum oil, orris oil, oam
• Top Notes As used herein means high volatile compounds, e.g. compounds having a vapour pressure above about 1000 ⁇ g/l.
• the fragrance composition may contain fillers such as propylengylcol methyl ether, dipropylenglycol, triethylenglycol, ethanol, dipropylenglycol, diethylphtalaten and carbitol .
• fillers such as propylengylcol methyl ether, dipropylenglycol, triethylenglycol, ethanol, dipropylenglycol, diethylphtalaten and carbitol .
• excipients such as insect repellents and antibacterials, for example Bronopol may be present in the fragrance composition.
• the fragrance composition according to the present invention may be used in all kinds of aerosol generators.
• a variety of aerosol generators have been used to distribute fragrance compositions.
• One method to vaporise a fragrance composition is by a piezoelectric spraying system.
• Said piezoelectric spraying system generates droplets through actuated piezo-membranes . Examples for such piezoelectric spraying system are disclosed in WO 00/47335 and US 6,014,970.
• Another aerosol generator is an electrospray device, which uses an electric field to generate small droplets. Such generators are described for example in EP 194074 and W094/12285.
• Another aerosol generator, a so-called “Venturi device” which is also known under the name "Indigo” splits a liquid mechanically into small droplets. Such a device is capable of generating very small droplets ( ⁇ 10 ⁇ m) which allow a fast transition of the aerosolised fragrance portion into the gas phase.
• a "Venturi device” is described, for example, in WO 99/49904.
• aerosol generators which are spraying systems such as piezoelectric spraying systems as described in WO00/47335 and US 6,014,970, which are hereby incorporated herein by reference, electrospray devices as described in EP 194074 and W094/12285, which are hereby incorporated herein by reference, or venturi devices as described in WO99/49904, which is incorporated herein by reference.
• the fragrance composition according to the present invention is distributed at ambient temperature.
• Fragrance compositions may be filled into devices containing aerosol generators.
• a fragrance composition in liquid form may be poured into a suitable receptacle provided in an aerosol generator device.
• fragrance compositions may be filled into a cartridge, which in turn may be adapted to be received in an aerosol-generator device, optionally in a refillable manner.
• Such cartridges may take any convenient form.
• the cartridge may be in the form of an air-less bag, e.g. similar to the airless bags employed in ink-jet printer cartridges .
• Fragrance compositions according to the present invention may be used in a wide variety of air-freshening and fragrancing products.
• products used for scenting large spaces such as living spaces, hotel rooms or lobbies, or the like, e.g. household or building ventilation and air-conditioning systems; multi-media products, e.g. home entertainment devices, scented cinema devices, computer and internet game devices; and devices used to scent cars and other means of transportation.
• fragrance compositions can be employed without using large volumes of solvents or fillers, they are particularly suitable for filling devices which are designed to be miniaturised or portable, or which are intended to incorporate a plurality of small-volumed, multi-scent cartridges where volume efficiency is important ' .
• Example 1 weight %

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• Dispersion Chemistry (AREA)
• Fats And Perfumes (AREA)

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Cited By (9)

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• 2002
  • 2002-04-23 US US10/476,479 patent/US20050037945A1/en not_active Abandoned
  • 2002-04-23 WO PCT/CH2002/000223 patent/WO2002089861A1/en not_active Ceased
  • 2002-04-23 JP JP2002586993A patent/JP2004536632A/ja active Pending
  • 2002-04-23 EP EP02712715A patent/EP1383546A1/en not_active Ceased

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