Perfume compositions – Perfume compositions
Reexamination Certificate
2001-09-21
2004-06-22
Warden, Jill (Department: 1743)
Perfume compositions
Perfume compositions
C424S001210, C424S001210
Reexamination Certificate
active
06753308
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to reduction of malodour and concerns methods and compositions for reducing malodour.
BACKGROUND TO THE INVENTION
It is clearly desirable to be able to reduce malodours in many circumstances, eg in domestic environments where common malodours include kitchen malodour, bathroom (lavatory) malodours, and malodours in carpets and furnishings eg caused by pets. Other common types of malodour include body malodour and malodours on clothes, eg caused by perspiration, smoke, environmental odours etc. The term “malodour” is used to refer to smells or odours generally regarded as undesirable or unpleasant in nature.
It is well known to incorporate fragrance or perfume materials in a wide range of products such as kitchen and bathroom cleaning products, air fresheners, carpet and fabric cleaners, laundry products, personal hygiene products etc, with a view to reducing such malodours. See, for example, WO 97/07778 and EP 0780132.
The present invention is based on the surprising discovery that certain known perfume or fragrance materials, when used in admixture with one or more other perfume or fragrance materials, have a greater effect in reducing malodours than would be expected or predicted based on the effect in reducing malodours of the materials on their own, thus indicating the presence of a synergistic effect.
The perfume or fragrance materials concerned are as follows:
1. 5-methyl-2-(2-methylpropyl)-1,3-dioxane, which is described in WO 96/30359, and which will be referred to herein as “Camonal” or “Cam” for brevity.
2. Methyl 1,4-dimethylcyclohexylcarboxylate, which is described in EP 0673408, and which will be referred to herein as “Cyprisate” or “Cy” for brevity.
3. 3-(((1-ethyloxy)ethyl)oxy)-3,7-dimethyl-1,6-octadiene, which is described in GB 1371727, and which will be referred to herein as “Elintaal” or “E1” for brevity.
4. 7,9-dimethylspiro(5,5)undecan-3-one, which is described in EP 0074693, and which will be referred to herein as “Dispirone” or “Dis” for brevity.
While these 4 materials are known to have attractive fragrance properties, their beneficial effect, when in admixture with other fragrance materials, in reducing malodours is not known and is not predictable.
SUMMARY OF THE INVENTION
In one aspect the present invention provides a fragrance composition comprising a mixture of two or more fragrance materials, including one or more of the following materials at least at the following minimum amounts by weight:
1. 5-methyl-2-(2-methylpropyl)-1,3-dioxane (Camonal) in an amount of at least 0.25%;
2. methyl 1,4-dimethylcyclohexylcarboxylate (Cyprisate) in an amount of at least 0.5%;
3. 3-(((1-ethyloxy)ethyl)oxy)-3,7-dimethyl-1,6-octadiene (Elintaal) in an amount of at least 15%; and
4. 7,9-dimethylspiro(5,5)undecan-3-one (Dispirone) in an amount of at least 2.5%.
In this specification, all references to % are % by weight unless otherwise specified.
The fragrance composition preferably includes at least two of the specified materials, preferably at least at the specified minimum amounts.
Camonal is preferably present at an amount of at least 7.5%. Cyprisate is preferably present in an amount in the range 0.5 to 15%. Elintaal is preferably present in an amount in the range 15 to 30%. Dispirone is preferably present in an amount of at least 2.5%.
There is a hedonic advantage in using mixtures as this allows a wider variety in fragrance hedonics to be produced with the same performance levels.
Mixtures containing 1:1:1 ratios of three of the ingredients perform well in all combinations. Mixtures containing 1:1 ratios of the ingredients should preferably contain Camonal or Cyprisate for good performance. Mixtures containing 1:1 ratios of Dispirone with an other ingredient should be avoided unless Camonal is used. Mixtures containing 2:1 ratios of ingredients perform best with either Canonal or Cyprisate at the highest proportion ingredient.
The terms “fragrance” and “perfume” are used synonymously in the present specification.
The terms “fragrance material” or “perfume material” are used herein to refer to a material which is added to a perfume or fragrance composition to contribute to the olfactive properties of the composition material. Typically, a perfume material will be generally recognised as possessing odours in its own right, will be relatively volatile and often has a molecular weight within the range 100 to 300. Typical perfume materials are described in “Perfume and Flavour Chemicals”, Volumes I and II (Steffan Arctander, 1969).
The terms “perfume composition” or “fragrance composition” are used herein to mean a mixture of fragrance materials, if desired mixed with or dissolved in a suitable solvent or mixed with a solid substrate. The mixture may be a complex mixture of many ingredients. The composition may be used to impart a desired odour to the skin and/or any product for which an agreeable odour is indispensable or desirable. Examples of such products are: fabric washing powders, washing liquids, fabric softeners and other fabric care products; detergents and household cleaning, scouring and disinfection products; air fresheners, room sprays and pomanders; soaps, bath and shower gels, shampoos, hair conditioners and other personal cleansing products; cosmetics such as creams, ointments, toilet waters, preshave, aftershave, skin and other lotions, talcum powders, body deodorants and antiperspirants, etc.
Other fragrance materials which can advantageously be employed in the fragrance composition according to the invention are, for example, natural products such as extracts, essential oils, absolutes, resinoids, resins, concretes etc., but also synthetic materials such as hydrocarbons, alcohols, aldehydes, ketones, ethers, acids, esters, acetals, ketals, nitrites, etc., including saturated and unsaturated compounds, aliphatic, carbocyclic and heterocyclic compounds.
Such fragrance materials are mentioned, for example, in S. Arctander, Perfume and Flavor Chemicals (Montclair, N.J., 1969) in S. Arctander, Perfume and Flavor Materials of Natural Origin (Elizabeth, N.J., 1960) and in “Flavor and Fragrance, Materials—1991”, Allured Publishing Co. Wheaton, Ill. USA.
It is preferred that other fragrance materials used in the fragrance composition of the invention are themselves not particularly good at reducing malodour but have medium, neutral or poor performance in this regard. The presence of one or more of Camonal, Cyprisate, Elintaal and Dispirone in the composition improves the malodour reduction properties of the composition.
Examples of fragrance materials which can be used in fragrance compositions to the invention are: geraniol, geranyl acetate, linalol, linalyl acetate, tetrahydrolinalol, citronellol, citronellyl acetate, dihydromyrcenol, dihydromyrcenyl acetate, tetrahydro-myrcenol, terpineol, terpinyl acetate, nopol, nopyl acetate, 2-phenylethanol, 2-phenylethyl acetate, benzyl alcohol, benzyl acetate, benzyl salicylate, styrallyl acetate, benzyl benzoate, amyl salicylate, dimethylbenzyl-carbinol, trichloromethylphenylcarbinyl acetate, p-tert-butylcyclohexyl acetate, isononyl acetate, vetiveryl acetate, vetiverol, &agr;-hexylcinnamaldehyde, 2-methyl-3-(p-tert-butylphenyl)propanal, 2-methyl-3-(p-isopropyl-phenyl)propanal, 3-(p-tert-butylphenyl)-propanal, 2,4-dimethylcyclohex-3-enyl-carboxaldehyde, tricyclodecenyl acetate, tricyclodecenyl propionate, 4-(4-hydroxy4-methylpentyl)-3-cyclohexenecarboxaldehyde, 4-(4-methyl-3-pentenyl)-3-cyclohexenecarboxyaldehyde, 4-acetoxy-3-pentyltetrahydropyran, 3-carboxymethyl-2-pentyl-cyclopentane, 2-n-heptylcyclopentanone, 3-methyl-2-pentyl-2-cyclopentenone, n-decanal, n-dodecanal, 9-decenol-1, phenoxyethyl isobutyrate, phenyl-acetaldehyde dimethyl-acetal, phenylacetaldehyde diethylacetal, geranyl nitrile, citronellyl nitrile, cedryl acetate, 3-isocamphyl-cyclohexanol, cedryl methyl ether, isolongifolanone, aubepine nitrile, aubepine, heliotropin, coumarin, eugenol, vanillin, diphenyl oxide, hydroxycitronellal, ionones, methylionones, isomethylionones, irones, cis-3-hexenol a
Behan John Martin
Mason Emma
Richardson Anne
Cole Monique T.
Morgan & Lewis & Bockius, LLP
Quest International B.V.
Warden Jill
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