Urease inhibitors

Abstract

Suggested is the use of a mixture consisting of (a) at least one fragrance raw material and (b) EDTA and / or NBPT for inhibiting urease.

Description

UREASE INHIBITORSAREA OF INVENTION

[0001] The present invention relates to the field of functional perfumery, in particular to the prevention of ammonia malodor formation, more particular to a mixture which has the ability to inhibit the enzyme urease.BACKGROUND OF THE INVENTION

[0002] Fragranced products such as perfumes, deodorants or other fragrance-containing compositions have widely been used in personal care, home care or pet care products to mask unpleasant odors. Overcoming ammonia malodors however is a major challenge due to its ability to not only activate the olfactory system but also trigger trigeminal chemo sensation. The latter is known to be a warning system for exposure to chemical hazards (in this case due to changes of pH) and therefore the perception is very unpleasant and hard to mask by conventional fragrances. As a result, the best approach to counteract ammonia odors is to prevent their formation.

[0003] Ammonia can be formed by an enzymatic hydrolysis in which the enzyme urease converts the urea present in the urine of humans and animals into ammonia and carbamate. The latter reacts spontaneously to form another ammonia molecule and carbon dioxide. The enzyme urease can be of bacterial origin, as in the case of urine, but can also be produced by fungi, yeasts and plants. Since ammonia is formed over time by the enzymatic process, one can either use antibacterial agents to reduce the amount of urease-positive bacteria or chemically inhibit the enzyme urease to prevent the formation of ammonia.

[0004] Inhibition of urease has been thoroughly studied from a medicinal point of view but also for agricultural products in particular urea containing fertilizers. In both areas, very powerful small molecule inhibitors were developed that are highly specific and effective against urease. For example, known inhibitors include compounds containing urea fragments, flavonoids, quinolones, heterocyclic compounds, organophosphorus compounds, and coordination complexing agents.

[0005] However, many of these compounds cannot be used for personal care, home care and pet care compositions because they are either toxic in high concentrations or have inherent odors that affect the olfactory profile.

[0006] As a result, it was the object of the invention to provide improved urease inhibitors that can be readily used in consumer products to tackle the challenge of ammonia malodor formation.DESCRIPTION OF THE INVENTION

[0007] A first object of the present invention refers to the use of a mixture consisting of(a) at least one fragrance raw material and(b) EDTA and / or NBPT for inhibiting urease.

[0008] The inventors have surprisingly found that the combination of fragrance raw materials together with the complexing agent Ethylenediaminetetraacetic acid (EDTA) and / or N-(n-Butyl)thiophosphoric triamide (NBPT) leads to a synergistic effect on urease inhibition. This is very surprising since EDTA or NBPT themselves have been previously described as urease inhibitors. The simultaneous use of different urease inhibitors is usually problematic, as they often hinder each other's effectiveness and this often leads to a deterioration in the urease inhibition instead of an improvement. However, the inventors have found that the combination of fragrance raw materials with EDTA, or the combination of fragrance raw materials with NBPT, or the combination of fragrance raw materials with EDTA and NBPT not only leads to an improvement of urease inhibition compared to the individual substances, but to a synergistic improvement. This allows to create compositions where the amount of the CMP substance NBPT and / or the amount of non-biodegradable EDTA can be reduced without a reduction in efficacy.

[0009] Thus, the present invention enables the reduction or complete elimination of unpleasant smelling and / or possibly toxic other urease inhibitors in compositions, in particular in home care, personal care and pet care compositions. The inventors additionally found that the fragrance raw materials are also able to scavenge the ammonia which was already formed by chemical reaction. Therefore, the present invention is preferably also directed to a combination of initial inhibition of the malodor source with interception of the formed malodor by chemical reaction, which is an effective technology reduce or eliminate ammonia perception. In other words, preferably the present invention is also directed to theuse of the mixture for inhibiting urease and scavenging ammonia which has already been formed.

[0010] Ureases functionally belong to the superfamily of amidohydrolases and phosphotriesterases. Ureases are found in numerous bacteria, fungi, algae, plants, and some invertebrates, as well as in soils, as a soil enzyme. They are nickel-containing metalloenzymes of high molecular weight. These enzymes catalyze the hydrolysis of urea into carbon dioxide and ammonia:The hydrolysis of urea occurs in two stages. In the first stage, ammonia and carbamate are produced. The carbamate spontaneously and rapidly hydrolyzes to ammonia and carbonic acid. Urease activity increases the pH of its environment as ammonia is produced, which is basic.

[0011] The fragrance raw materials as a part of the mixture according to the present invention are advantageously easily accessible or are readily available or can be easy prepared, are highly effective even at low concentrations commonly used for the application, in particular at concentrations at which the fragrance raw materials have no odor or at least only a barely perceptible odor, are largely or completely colorless, have a high stability in various mixtures or preparations and have no toxic and / or allergenic effect on humans.

[0012] The fragrance raw materials of the present invention also have the advantage that they can be combined with different fragrance raw materials, other than the fragrance raw materials according to the invention, and perfume oils or essential oils or usual components of a perfume oil in order to perfume products with any desired fragrance. Consequently, by the present invention, a wide range of fragrance types can be offered to consumers. In one embodiment according to the invention, only the fragrance raw materials of the present invention are used together with EDTA and / or NBPT to perfume products.

[0013] A "urease inhibitor" or "urease inhibitors" according to the present invention are chemical compounds, in the sense of the present invention in particular fragrance raw materials and EDTA and / or NBPT, that reduce or completely prevent the activity of the enzyme urease.

[0014] The fragrance raw materials as well as EDTA and NBPT can be in liquid form, undiluted or diluted with a solvent and are advantageously used for perfuming. Preferred solvents for this purpose are ethanol, isopropanol, diethylene glycol monoethyl ether, glycerol, propylene glycol, 1 ,2-butylene glycol, dipropylene glycol, diethyl phthalate, triethyl citrate, isopropyl myristate, triacetin, 2,2-dimethyl-1,3-dioxolane-4-methanol and diacetin. More preferred solvent is triethyl citrate.

[0015] In a preferred embodiment according to the invention, the amount of the mixture according to the invention is not sufficient to impart an inherent odor when added to a composition or product. The mixture according to the invention has the advantage that, when used, in particular according to the use according to the invention, it is already active for the purposes of the present invention in such low concentrations at which no or at least no perceptible intrinsic odor of the mixture is imparted. This allows the mixture to be combined with different fragrance types (not according to the invention) as well as optionally further components of a perfume oil, to produce particularly advantageous fragrance mixtures or to additionally perfume products with any desired scent.

[0016] In a preferred embodiment according to the invention, the composition or product is a home care, personal care or pet care composition or product. Preferred personal care compositions / products are cosmetic products and intimate care products, in particular sanitary napkins, diapers, lotion, shampoo, incontinence pads. Preferred home care compositions / products are toilet care products, for example rim blocks, APC Cleaner, Air Care. Preferred pet care compositions / products are animal litter and pet shampoo.

[0017] A "fragrance raw material" according to the present invention is a raw material which can be used for fragrance composition as well as perfume oils. Fragrance raw materials can be of synthetic or natural origin. As said above, they can have a pleasant smell which can be easily combined with other fragrance raw materials according to the invention or fragrance raw materials not according to the invention to create advantageous fragrance mixtures or perfume oils.

[0018] In a preferred embodiment according to the invention the fragrance raw materials are selected from fragrance raw materials having a molecular weight between 95 to 250 g / mol and essential oils. Preferably, the fragrance raw materials having a molecular weight between 95 to 250 g / mol are selected from acetal, alcohols, hydrocarbon, aldehydes, ketones, ethers, esters, lactone and phenol. More preferably, the fragrances having a molecular weightbetween 95 to 250 g / mol are selected from the group consisting of Jasmol, cis-1 -(1 -Ethoxyethoxy)-3-hexene (leaf acetal), 3,7-Dimethylocta-2,6-dien-1 -ol, Cinnamyl alcohol, 4-Methyl-2-(2-methylpropyl)oxan-4-ol, Trans-2-Hexenol, Cis-3-Hexenol, 2-Benzylheptanol, Geraniol, Furaneol, Citral, 3-(4-Tert-butylphenyl)butanal, 3-(4-Ethylphenyl)-2,2-dimethylpropanal,3-(2-Ethylphenyl)-2,2-dimethylpropanal, Aldehyde C12, Trans-2-Hexenal, (±)-2,6-Dimethyl-5-heptenal, (Z,E)-2,4-dimethyl cyclohex-3-ene-1 -carbaldehyde, Cyclamen aldehyde, (Z,E)-2,4-dimethyl cyclohex-3-ene-1-carbaldehyde (68039-49-6; 68737-61 -1; Ligustral, Tripalal, Cyclal C, Vertocitral) , Alpha-hexyl cinnamaldehyde,(2E)-3,7-Dimethylocta-2,6-dienal, 3-(4-Ethylphenyl)-2,2-dimethylpropanal, Helional, Cis-3-hexenyl hexanoate, Cis-3-hexenyl butyrate, Cis-3-hexenyl acetate, Cis-3-Hexenyl isovalerate, Cis-Carvyl acetate, Trans-Carvyl acetate, 1,6-Dihydro-carvyl acetate , 1,6-Dihydro-neo-carveol Cis-3-hexenyl propionate,Cis-3-hexenyl isobutyrate, Cis-3-hexenyl salicylate, Nerolin Yara Yara, 5-Ethyl-3-hydroxy-4methyl-2(5 / - / )-furanon (698-10-2), Terpinene gamma, Ocimene, Beta Ionone, N-methyl ionone, Methyl heptanone, Alpha Damascene, Alpha-methyl ionone, Methyl cyclopentenolone, 2-Methyl-5-propyl-2-Cyclohexenone, Beta-damascenone, 1 -(5,5-Dimethyl-1 -cyclohexenyl)pent-4-en-1 -one, Dimethyl benzofuranone and Eugenol.

[0019] In another preferred embodiment the fragrances having a molecular weight between 95 to 250 g / mol are selected from the group consisting of cis-1 -(1 -Ethoxyethoxy)-3-hexene (leaf acetal), 3,7-Dimethylocta-2,6-dien-1 -ol, Cinnamyl alcohol, 4-Methyl-2-(2- methylpropyl)oxan-4-ol, Trans-2-Hexenol, Cis-3-Hexenol, 2-Benzylheptanol, Geraniol, Furaneol, Citral, 3-(4-Tert-butylphenyl)butanal, 3-(4-Ethylphenyl)-2,2-dimethylpropanal, 3-(2-Ethylphenyl)-2,2-dimethylpropanal, Aldehyde C12, (±)-2,6-Dimethyl-5-heptenal, (Z,E)- 2,4-dimethyl cyclohex-3-ene-1 -carbaldehyde, Cyclamen aldehyde, (Z,E)-2,4-dimethyl cyclohex-3-ene-1 -carbaldehyde (68039-49-6; 68737-61 -1; Ligustral, Tripalal, Cyclal C, Vertocitral), Alpha-hexyl cinnamaldehyde, (2E)-3,7-Dimethylocta-2,6-dienal, 3-(4- Ethylphenyl)-2,2-dimethylpropanal, Helional, Cis-3-hexenyl hexanoate, Cis-3-hexenyl butyrate, Cis-3-hexenyl acetate, Cis-3-Hexenyl isovalerate, Cis-Carvyl acetate, Trans-Carvyl acetate, 1,6-Dihydro-carvyl acetate , 1,6-Dihydro-neo-carveol, Cis-3-hexenyl propionate, Cis-3-hexenyl isobutyrate, Cis-3-hexenyl salicylate, Nerolin Yara Yara, 5-Ethyl-3-hydroxy-4methyl-2(5 / - / )-furanon (698-10-2), Terpinene gamma, Ocimene, BetaIonone, N-methyl ionone, Methyl heptanone, Alpha Damascene, Alpha-methyl ionone, Methyl cyclopentenolone, 2-Methyl-5-propyl-2-Cyclohexenone„ Beta-damascenone, 1 -(5,5-Dimethyl-1 -cyclohexenyl)pent-4-en-1 -one, Dimethyl benzofuranone and Eugenol.

[0020] In a more preferred embodiment according to the invention, the fragrances having a molecular weight between 95 to 250 g / mol are selected from the group consisting of cis- 1 - (1 -Ethoxyethoxy)-3-hexene (leaf acetal),Cis-3-Hexenol, 2-Benzylheptanol, Geraniol, Furaneol, Cyclamen aldehyde, (Z,E)-2,4-dimethyl cyclohex-3-ene-1 -carbaldehyde (68039-49-6; 68737-61 -1; Ligustral, Tripalal, Cyclal C, Vertocitral) Alpha-hexyl cinnamaldehyde,(2E)-3,7-Dimethylocta-2,6-dienal, 3-(4-Ethylphenyl)-2,2-dimethylpropanal, Helional, Cis-3-hexenyl butyrate, Cis-3-hexenyl acetate,Cis-3-Hexenyl isovalerate, Cis-Carvyl acetate, Trans-Carvyl acetate, 1,6-Dihydro-carvyl acetate, 1,6-Dihydro-neo-carveol, Cis-3-hexenyl propionate,Cis-3-hexenyl isobutyrate, Cis-3-hexenyl salicylate,5-Ethyl-3-hydroxy-4methyl-2(5 / - / )-furanon (698-10-2),, Terpinene gamma, Ocimene, Methyl heptanone, Alpha Damascene, Alpha-methyl ionone,Methyl cyclopentenolone, 2-Methyl-5-propyl-2-Cyclohexenone, Beta-damascenone,1 -(5,5-Dimethyl-1 -cyclohexenyl)pent-4-en-1 -one, Dimethyl benzofuranone and Eugenol.

[0021] In an even more preferred embodiment according to the invention, the fragrances having a molecular weight between 95 to 250 g / mol are selected from the group consisting of cis-1 -(1 -Ethoxyethoxy)-3-hexene (leaf acetal),2-Benzylheptanol, Geraniol, Furaneol, 3-(4-Ethylphenyl)-2,2-dimethylpropanal, Helional,Cis-3-hexenyl butyrate, Cis-3-hexenyl acetate,Cis-3-Hexenyl isovalerate, Cis-Carvyl acetate, Trans-Carvyl acetate, 1,6-Dihydro-carvyl acetate, 1,6-Dihydro-neo-carveol, Cis-3-hexenyl propionate,Cis-3-hexenyl isobutyrate, Cis-3-hexenyl salicylate,Ocimene, Alpha-methyl ionone,Methyl cyclopentenolone, 2-Methyl-5-propyl-2-Cyclohexenone, Beta-damascenone, 1 -(5,5-Dimethyl-1 -cyclohexenyl)pent-4-en-1 -one, Dimethyl benzofuranone and Eugenol.

[0022] Preferably, the essential oil according to the present invention comprises at least one of the following compounds as main ingredients: Eucalyptol, Geranial, Citronellol, Linalool, alpha-Pinen (80-65-8), beta-Pinen (127-91 -3), Eugenol, (1 E,6E,8S)-1 -methyl-5-methylidene-8- propan-2-ylcyclodeca-1,6-diene (23986-74-5, Germacren D), 4,8-dimethyl-2-propan-2-ylidene-3,3a,4,5,6,8a-hexahydro-1 H-azulen-6-ol (68129-81 -7, Vetiverol), (1 R,3R,6S)-2, 2,6,8- Tetramethyl-tricyclo[5.3.1.03,8]undec-3-ol (5986-55-0, Patchouli alcohol), p-Mentha-1,8-dien (5989-27-5, Limonen D), (+)-3-Caren, (1 S)-3,7,7-Trimethyl-bicyclo[4.1.0]hept-3-en (498-15-7, delta-3-Caren), 2,5,9,9-tetramethyl-3,4,6,7,8,9a-hexahydrobenzo[7]annulene (1461 -03-6, Himachalen beta).

[0023] In another aspect of the invention the at least on fragrance raw material is selected from the group consisting of| EUGENYL ACETATE | ESTER | 0.3 I 1 I

[0024] The fragrance raw materials have different levels of urease inhibition levels tested as described in the experimental section. While there are many fragrance raw materials that do not show inhibition, the inventors have found that there are a number with a level of 1 (inhibition rate between >0.3 and <0.5), level 2 (inhibition rate between >0.5 and < 0.75), level 3 (inhibition rate between >0.75 and <0.9) or even level 4 (inhibition rate >0.9).Preferably the fragrance raw material is selected from a level 2, 3 or 4, more preferably a level 3 or 4, and most preferably a level 4 according to the test in the examples.

[0025] As such the preferred fragrance raw materials are selected from the group consisting of

[0026] In another preferred embodiment the fragrance raw materials are selected from the group consisting ofFURANEOL

[0027] In another preferred embodiment the fragrance raw materials are selected from the group consisting of

[0028] In another preferred embodiment the fragrance raw materials are selected from the group consisting of

[0029] In another preferred embodiment the fragrance raw materials are selected from the group consisting of

[0030] It is possible to use all the mentioned fragrance raw materials in each different embodiment in a mixture with EDTA or NBPT or NBPT and EDTA.

[0031] Preferably, the present invention refers to the use of a mixture consisting of(a) at least one fragrance raw material having a molecular weight between 95 to 250 g / mol which is selected from the group consisting of cis-1 -(1 -Ethoxyethoxy)-3-hexene (leaf acetal),2-Benzylheptanol, Geraniol, Furaneol, 3-(4-Ethylphenyl)-2,2-dimethylpropanal, Helional, Cis-3-hexenyl butyrate, Cis-3-hexenyl acetate,Cis-3-Hexenyl isovalerate, Cis-Carvyl acetate, Trans-Carvyl acetate, 1,6-Dihydro-carvyl acetate, 1,6-Dihydro-neo-carveol, Cis-3-hexenyl propionate,Cis-3-hexenyl isobutyrate, Cis-3-hexenyl salicylate,Ocimene, Alpha-methyl ionone,Methyl cyclopentenolone, 2-Methyl-5-propyl-2-Cyclohexenone„ Beta-damascenone, 1 -(5,5-Dimethyl-1 -cyclohexenyl)pent-4-en-1 -one, Dimethyl benzofuranone and Eugenol; and(b) EDTA for inhibiting urease.

[0032] Preferably, the present invention refers to the use of a mixture consisting of(a) at least one fragrance raw material having a molecular weight between 95 to 225 g / mol which is selected from the group consisting of cis-1 -(1 -Ethoxyethoxy)-3-hexene (leaf acetal), 2-Benzylheptanol, Geraniol, Furaneol, 3-(4-Ethylphenyl)-2,2-dimethylpropanal, Helional,Cis-3-hexenyl butyrate, Cis-3-hexenyl acetate,Cis-3-Hexenyl isovalerate, Cis-Carvyl acetate, Trans-Carvyl acetate, 1,6-Dihydro-carvyl acetate, 1,6-Dihydro-neo-carveol, Cis-3-hexenyl propionate,Cis-3-hexenyl isobutyrate, Cis-3-hexenyl salicylate,Ocimene, Alpha-methyl ionone,Methyl cyclopentenolone, 2-Methyl-5-propyl-2-Cyclohexenone„ Beta-damascenone, 1 -(5,5-Dimethyl-1 -cyclohexenyl)pent-4-en-1 -one, Dimethyl benzofuranone and Eugenol; and(b) NBPT for inhibiting urease.

[0033] In one aspect of the invention the amount of the at least one fragrance raw material in the mixture is of from 0.0005 to 99.9995, preferably from 0.005 to 99.995, more preferably from 25 to 99.99 and most preferably from 50 to 99.9 weight percent, calculated on the total amount of the mixture.

[0034] In one aspect of the invention the amount of EDTA is of from 0.01 to 75 weight percent, preferably from 0.01 to 50 and more preferably from 1.0 to 35 calculated on the total amount of the mixture.

[0035] In one aspect of the invention the amount of NBPT is of from 0.0000001 to 25 weight percent, calculated on the total amount of the mixture, preferably 0.00001 to 20 weight percent, more preferably 0.0001 to 10 weight percent and most preferably 0.001 to 2 weight percent.

[0036] In one aspect of the invention the ratio of the at least one fragrance raw material to EDTA is from 1:20 to 100:1, preferably from 1:10 to 50:1, more preferably from 1:5 to 25:1 by weight.

[0037] In one aspect of the invention the ratio of the at least one fragrance raw material to NBPT is from 10000:1 to 1:5, preferably from 1000:1 to 1:2 more preferably from 200:1 to 1:1 by weight and most preferably from 200:1 to 30:1.

[0038] It can be advantageous to prepare the components of the mixture. It is preferred if one or more of the components are microencapsulated, spray-dried, as inclusion complexes, or as extrusion products, preferably the fragrance raw material and / or the EDTA, more preferably only the EDTA.

[0039] In one aspect of the present invention the invention is put into practice as a personal care composition comprising the mixture consisting of(a) at least one fragrance raw material and(b) EDTA and / or NBPT.

[0040] In one aspect of the present invention the invention is put into practice as a personal care composition, wherein the(a) at least one fragrance raw material and(b) EDTA are present in a ratio from 1:20 to 100:1, preferably from 1:10 to 50:1, more preferably from 1:5 to 25:1 by weight.

[0041] In another aspect of the present invention the invention is put into practice as a personal care composition of claim 20, wherein the(a) at least one fragrance raw material and(b) NBPT are present from 10000:1 to 1 :5, preferably from 1000:1 to 1 :2 more preferably from 200:1 to 1 :1 by weight and most preferably from 200:1 to 30:1.

[0042] In yet another aspect of the present invention the invention is put into practice as a home care composition comprising the mixture consisting of(a) at least one fragrance raw material and(b) EDTA and / or NBPT.

[0043] In yet another aspect of the present invention the invention is put into practice as a home care composition, wherein the(a) at least one fragrance raw material and(b) NBPT are present in a ratio from 10000:1 to 1 :5, preferably from 1000:1 to 1 :2 more preferably from 200:1 to 1 :1 by weight and most preferably from 200:1 to 30:1.

[0044] In yet another aspect of the present invention the invention is put into practice as a home care composition, wherein the(a) at least one fragrance raw material and(b) EDTA are present in a ratio from 1 :20 to 100:1, preferably from 1 :10 to 50:1, more preferably from 1 :5 to 25:1 by weight. Preferably the home care composition is a rim block or an All-purpose cleaner (APC). The effect of the invention is so powerful that the home care composition can be used in water of more than 7° Hardness, preferably more than 10°, and more preferably more than 14°. This is surprising as water hardness has usually a negative effect on the performance of EDTA.

[0045] In still another aspect of the present invention the invention is put into practice as a pet care composition comprising the mixture consisting of(a) at least one fragrance raw material and(b) EDTA and / or NBPT.

[0046] In still another aspect of the present invention the invention is put into practice as a pet care composition, wherein the(a) at least one fragrance raw material and(b) NBPT are present in a ratio from 10000:1 to 1 :5, preferably from 1000:1 to 1 :2 more preferably from 200:1 to 1 :1 by weight and most preferably from 200:1 to 30:1 .

[0047] In still another aspect of the present invention the invention is put into practice as a pet care composition, wherein the(a) at least one fragrance raw material and(b) EDTA are present in a ratio from 1 :20 to 100:1, preferably from 1 :10 to 50:1, more preferably from 1 :5 to 25:1 by weight.

[0048] In a preferred embodiment the personal care, home care or pet care composition according to the invention does not contain any further urease inhibitor.

[0049] In another preferred embodiment the personal care, home care or pet care composition according to the invention contains a fragrance raw material selected from fragrance raw materials having a molecular weight between 95 to 250 g / mol and essential oils.

[0050] In another preferred embodiment the personal care, home care or pet care composition according to the invention contains a fragrance raw material selected from the molecules having a test result of 4.

[0051] In another preferred embodiment the personal care, home care or pet care composition according to the invention contains a fragrance raw material selected from the molecules having a test result of 3.

[0052] In another aspect of the present invention a method for inhibiting urease activity in a personal care, home care or pet care composition, in provided wherein a mixture consisting of(a) at least one fragrance raw material and(b) EDTA and / or NBPTis added to the personal care, home care or pet care composition.

[0053] In a preferred method to inhibit urease activity in a personal care, home care or pet care composition the mixture is added in an amount of from 0.01 to 10 weight percent to the personal care, home care or pet care composition, calculated on the total weight of the personal care, home care or pet care composition.

[0054] Preferably, the present invention refers to the use of a mixture consisting of(a) at least one essential oil, wherein the essential oil comprises at least one of the following compounds as main ingredients: Eucalyptol, Geranial, Citronellol, Linalool, alpha- Pinen (80-65-8), beta-Pinen (127-91-3), Eugenol, (1 E,6E,8S)-1 -methyl-5-methylidene-8- propan-2-ylcyclodeca-1,6-diene (23986-74-5, Germacren D), 4,8-dimethyl-2-propan-2- ylidene-3,3a,4,5,6,8a-hexahydro-1 H-azulen-6-ol (68129-81 -7, Vetiverol), (1 R,3R,6S)-2,2,6,8- Tetramethyl-tricyclo[5.3.1.03,8]undec-3-ol (5986-55-0, Patchouli aclohol), p-Mentha-1,8-dien (5989-27-5, Limonen D), (+)-3-Caren, (1S)-3,7,7-Trimethyl-bicyclo[4.1.0]hept-3-en (498-15-7, delta-3-Caren), 2,5,9,9-tetramethyl-3,4,6,7,8,9a-hexahydrobenzo[7]annulene (1461 -03-6, Himachalen beta). and(b) EDTA for inhibiting urease.

[0055] Preferably, the present invention refers to the use of a mixture consisting of(a) at least one essential oil, wherein the essential oil comprises at least one of the following compounds as main ingredients: Eucalyptol, Geranial, Citronellol, Linalool, alpha- Pinen (80-65-8), beta-Pinen (127-91-3), Eugenol, (1 E,6E,8S)-1 -methyl-5-methylidene-8- propan-2-ylcyclodeca-1,6-diene (23986-74-5, Germacren D), 4,8-dimethyl-2-propan-2- ylidene-3,3a,4,5,6,8a-hexahydro-1 H-azulen-6-ol (68129-81 -7, Vetiverol), (1 R,3R,6S)-2,2,6,8- Tetramethyl-tricyclo[5.3.1.03,8]undec-3-ol (5986-55-0, Patchouli aclohol), p-Mentha-1,8-dien (5989-27-5, Limonen D), (+)-3-Caren, (1S)-3,7,7-Trimethyl-bicyclo[4.1.0]hept-3-en (498-15-7, delta-3-Caren), 2,5,9,9-tetramethyl-3,4,6,7,8,9a-hexahydrobenzo[7]annulene (1461 -03-6, Himachalen beta); and(b) NBPT for inhibiting urease.

[0056] Preferably, the present invention refers to the use of a mixture consisting of(a) at least one fragrance having a molecular weight between 95 to 250 g / mol are selected from the group consisting of cis-1 -(1 -Ethoxyethoxy)-3-hexene (leaf acetal), 2-Benzylheptanol, Geraniol, Furaneol, 3-(4-Ethylphenyl)-2,2-dimethylpropanal, Helional, Cis-3-hexenyl butyrate, Cis-3-hexenyl acetate,Cis-3-Hexenyl isovalerate, Cis-Carvyl acetate, Trans-Carvyl acetate, 1,6-Dihydro-carvyl acetate, 1,6-Dihydro-neo-carveol, Cis-3-hexenyl propionate,Cis-3-hexenyl isobutyrate, Cis-3-hexenyl salicylate,Ocimene, Alpha-methyl ionone,Methyl cyclopentenolone, 2-Methyl-5-propyl-2-Cyclohexenone„ Beta-damascenone,1 -(5,5-Dimethyl-1 -cyclohexenyl)pent-4-en-1 -one, Dimethyl benzofuranone and Eugenol; and at least one essential oil selected, wherein the essential oil comprises at least one of the following compounds as main ingredients: Eucalyptol, Geranial, Citronellol, Linalool, alpha- Pinen (80-65-8), beta-Pinen (127-91-3), Eugenol, (1 E,6E,8S)-1 -methyl-5-methylidene-8- propan-2-ylcyclodeca-1,6-diene (23986-74-5, Germacren D), 4,8-dimethyl-2-propan-2- ylidene-3,3a,4,5,6,8a-hexahydro-1 H-azulen-6-ol (68129-81 -7, Vetiverol), (1 R,3R,6S)-2,2,6,8- Tetramethyl-tricyclo[5.3.1.03,8]undec-3-ol (5986-55-0, Patchouli aclohol), p-Mentha-1,8-dien (5989-27-5, Limonen D), (+)-3-Caren, (1S)-3,7,7-Trimethyl-bicyclo[4.1.0]hept-3-en (498-15-7, delta-3-Caren), 2,5,9,9-tetramethyl-3,4,6,7,8,9a-hexahydrobenzo[7]annulene (1461 -03-6, Himachalen beta).; and(b) EDTA

[0057] Preferably, the present invention refers to the use of a mixture consisting of(a) at least one fragrance having a molecular weight between 95 to 250 g / mol are selected from the group consisting of cis-1 -(1 -Ethoxyethoxy)-3-hexene (leaf acetal),2-Benzylheptanol, Geraniol, Furaneol, 3-(4-Ethylphenyl)-2,2-dimethylpropanal, Helional,Cis-3-hexenyl butyrate, Cis-3-hexenyl acetate,Cis-3-Hexenyl isovalerate, Cis-Carvyl acetate, Trans-Carvyl acetate, 1,6-Dihydro-carvyl acetate, 1,6-Dihydro-neo-carveol, Cis-3-hexenyl propionate,Cis-3-hexenyl isobutyrate, Cis-3-hexenyl salicylate,Ocimene, Alpha-methyl ionone,Methyl cyclopentenolone, 2-Methyl-5-propyl-2-Cyclohexenone„ Beta-damascenone, 1 -(5,5-Dimethyl-1 -cyclohexenyl)pent-4-en-1 -one, Dimethyl benzofuranone and Eugenol; andat least one essential oil, wherein the essential oil comprises at least one of the following compounds as main ingredients: Eucalyptol, Geranial, Citronellol, Linalool, alpha-Pinen (80- 65-8), beta-Pinen (127-91 -3), Eugenol, (1 E,6E,8S)-1-methyl-5-methylidene-8-propan-2- ylcyclodeca-1,6-diene (23986-74-5, Germacren D), 4,8-dimethyl-2-propan-2-ylidene- 3,3a,4,5,6,8a-hexahydro-1 H-azulen-6-ol (68129-81 -7, Vetiverol), (1 R,3R,6S)-2,2,6,8- Tetramethyl-tricyclo[5.3.1.03,8]undec-3-ol (5986-55-0, Patchouli aclohol), p-Mentha-1,8-dien (5989-27-5, Limonen D), (+)-3-Caren, (1S)-3,7,7-Trimethyl-bicyclo[4.1.0]hept-3-en (498-15-7, delta-3-Caren), 2,5,9,9-tetramethyl-3,4,6,7,8,9a-hexahydrobenzo[7]annulene (1461 -03-6, Himachalen beta).; and(b) NBPT

[0058] Preferably, the present invention refers to the use of a mixture consisting of(a) at least one fragrance having a molecular weight between 95 to 250 g / mol are selected from the group consisting of cis-1 -(1 -Ethoxyethoxy)-3-hexene (leaf acetal), 2-Benzylheptanol, Geraniol, Furaneol, 3-(4-Ethylphenyl)-2,2-dimethylpropanal, Helional, Cis-3-hexenyl butyrate, Cis-3-hexenyl acetate,Cis-3-Hexenyl isovalerate, Cis-Carvyl acetate, Trans-Carvyl acetate, 1,6-Dihydro-carvyl acetate, 1,6-Dihydro-neo-carveol Cis-3-hexenyl propionate,Cis-3-hexenyl isobutyrate, Cis-3-hexenyl salicylate,Ocimene, Alpha-methyl ionone,Methyl cyclopentenolone, 2-Methyl-5-propyl-2-Cyclohexenone„ Beta-damascenone, 1 -(5,5-Dimethyl-1 -cyclohexenyl)pent-4-en-1 -one, Dimethyl benzofuranone and Eugenol; and at least one essential oil, wherein the essential oil comprises at least one of the following compounds as main ingredients: Eucalyptol, Geranial, Citronellol, Linalool, alpha-Pinen (80- 65-8), beta-Pinen (127-91 -3), Eugenol, (1 E,6E,8S)-1-methyl-5-methylidene-8-propan-2- ylcyclodeca-1,6-diene (23986-74-5, Germacren D), 4,8-dimethyl-2-propan-2-ylidene- 3,3a,4,5,6,8a-hexahydro-1 H-azulen-6-ol (68129-81 -7, Vetiverol), (1 R,3R,6S)-2,2,6,8- Tetramethyl-tricyclo[5.3.1.03,8]undec-3-ol (5986-55-0, Patchouli aclohol), p-Mentha-1,8-dien (5989-27-5, Limonen D), (+)-3-Caren, (1S)-3,7,7-Trimethyl-bicyclo[4.1.0]hept-3-en (498-15-7, delta-3-Caren), 2,5,9,9-tetramethyl-3,4,6,7,8,9a-hexahydrobenzo[7]annulene (1461 -03-6, Himachalen beta).; and(b) EDTA and NBPT

[0059] In a preferred embodiment according to the invention, the amount of the at least one fragrance raw material is of from 0.1 to 75 weight percent, calculated on the total amount of the mixture. Preferably, the amount of EDTA is of from 0.1 to 50 weight percent, calculated on the total amount of the mixture. Preferably, the amount of NBPT is of from 0.01 to 25 weight percent, calculated on the total amount of the mixture.

[0060] In a preferred embodiment according to the invention, the ratio of the at least one fragrance raw material to EDTA and / or NBPT is 1 :5 to 5:1.

[0061] It goes without saying that one or more fragrance raw materials can be used to inhibit urease activity. Therefore, for example one, two, three, four, five, six, seven, eight, nine, ten or even twenty to thirty fragrance raw materials according to the present invention can be used to inhibit urease activity in the mixture according to the invention.

[0062] Another embodiment of the present invention relates to a personal care composition comprising the mixture consisting of(a) at least one fragrance raw material and(b) EDTA and / or NBPT.

[0063] Another embodiment of the present invention relates to a home care composition comprising the mixture consisting of(a) at least one fragrance raw material and(b) EDTA and / or NBPT.

[0064] Another embodiment of the present invention relates to a pet care composition comprising the mixture consisting of(a) at least one fragrance raw material and(b) EDTA and / or NBPT.

[0065] Preferably, the mixture is used in an amount of from 0.01 to 10 weight percent when added to a composition or product, calculated on the total weight of the composition or product. More preferably, the mixture is used in an amount of from 0.05 to 5 weight percent; more preferably in an amount of from 0.05 to 1 weight percent and most preferably in an amount of from 0.1 to 1 weight percent; all weight percentages calculated on the total weight of the composition or product. When the mixture according to the present invention is used in rim blocks, it is preferably used in an amount of from 0.01 to 10 weight percent,more preferably in an amount of from 1 to 8 weight percent, more preferably in an amount of from 2 to 6 weight percent, even more preferably in an amount of from 2.5 to 4.5 weight percent, calculated on the total weight of the composition or product.

[0066] Particularly advantageous is a use according to the invention in which the ratio of the total mass of the mixture to the total mass of at least one precursor of ammonia is from 2:1 to 1:5, more preferably from 1:1 to 1:3.

[0067] A "precursor" according to the present invention is a compound that participates in a chemical reaction that produces another compound. In the present case, a "precursor of ammonia" is a compound that participates in a chemical reaction that produces ammonia. In one embodiment according to the invention, the precursor of ammonia is urea.

[0068] Thus, in a preferred embodiment according to the invention, the mixture is used as urease inhibitor in a composition or product, in particular in home care, personal care and pet care compositions / products, together with at least one precursor of ammonia. Therefore, it is possible, when getting in contact with, for example, bacterial ureases, to completely, but at least partially, prevent the formation of ammonia by means of the mixture of the present invention.

[0069] It goes without saying that one or more fragrance raw materials can be used in the mixture to inhibit urease activity. Therefore, for example one, two, three, four, five, six, seven, eight, nine or even up to 50 fragrances having a molecular weight between 95 to 250 g / mol can be used to inhibit urease activity in a home care, personal care or pet care composition / product.

[0070] Examples of other fragrances which can in principle be advantageously used as a further component together with the mixture, can be found, for example, in S. Arctander, Perfume and Flavor Chemicals, Vol. I and II, Montclair, N. J., 1969, Selbstverlag oder H. Surburg, J. Panten, Common Fragrance and Flavor Materials, 5th Ed., Wiley-VCH, Weinheim 2006.

[0071] In some embodiments according to the invention, the mixture of the invention can be combined with further fragrances or solvents. The mixture according to the invention can be in liquid form, undiluted or diluted with a solvent and is advantageously used for perfuming. Preferred solvents for this purpose are ethanol, isopropanol, diethylene glycol monoethyl ether, glycerol, propylene glycol, 1,2-butylene glycol, dipropylene glycol, diethyl phthalate,triethyl citrate, isopropyl myristate, triacetin, 2,2-dimethyl-1,3-dioxolane-4-methanol and diacetin.

[0072] Furthermore, the mixture according to the invention may be adsorbed on a carrier that provides both fine distribution of the fragrance raw materials in the product and controlled release upon application. Such carriers may be porous inorganic materials such as light sulfate, silica gels, zeolites, gypsums, clays, clay granules, aerated concrete, etc., or organic materials such as woods, cellulose-based materials, sugars, dextrins (e.g., maltodextrin), or plastics such as PVC, polyvinyl acetates, or polyurethanes. T

[0073] The mixture according to the invention may also be microencapsulated, spray-dried, as inclusion complexes, or as extrusion products, and may be added in this form, for example, to a product to be perfumed. Preferably the mixtures are treated as described in US2009253612A1 or US7235261 B2.

[0074] If necessary, the properties of the compositions can be further optimized by so-called "coating" with suitable materials with a view to more targeted fragrance release, for which purpose waxy plastics such as polyvinyl alcohol are preferably used.

[0075] Preferably, the personal care, home care or pet care composition according to the invention do not contain any further urease inhibitor

[0076] Other preferred embodiments and definitions which have been described above also apply, of course, to the personal care, home care and pet care composition / product according to the invention.

[0077] A further embodiment according to the invention refers to a method for inhibiting urease activity in a personal care, home care or pet care composition, wherein a mixture consisting of(a) at least one fragrance raw material and(b) EDTA and / or NBPT is added to the personal care, home care or pet care composition

[0078] Preferably, the mixture is added in an amount of from 0.01 to 10 weight percent, calculated on the total weight of the personal care, home care or pet care composition. More preferably, the mixture is added in an amount of from 0.05 to 5 weight percent, calculated on the total weight of the personal care, home care or pet care composition. Even more preferably, the mixture is added in an amount of from 0.05 to 1 weight percent, calculated onthe total weight of the personal care, home care or pet care composition. When the mixture according to the present invention is added to rim blocks, it is preferably used in an amount of from 0.01 to 10 weight percent, more preferably in an amount of from 1 to 8 weight percent, more preferably in an amount of from 2 to 6 weight percent, even more preferably in an amount of from 2.5 to 4.5 weight percent, calculated on the total weight of the composition or product.

[0079] The above-mentioned preferred embodiments and definitions of course also apply to the method according to the present invention.

[0080] In the following, embodiments of the invention are further characterized.

[0081] If not indicated otherwise, all amounts are indicated in weight percent.EXAMPLESExample 1Screening of Urease Inhibition

[0082] Materials:Stock Solutions:PBS 2x: PBS 2x solution is prepared by dilution of PBS 10x. To this diluted solution ~0,5 mg of phenol red is added. pH is set to 5 - 6 with HCI (37%). The optimal color of the solution is yellow.• Urea: 10 g / L stock solution of urea is prepared in distilled water.• MasterMix - Stock of PBS and urea: 12 mL 2x PBS + 2.4 ml urea stock solution + 6 ml distilled water.• Urease: Urease solution is prepared with the activity of ~20 U / mL in distilled water, using Urease aus Canavalia ensiformis (Jack bean) - Sigma Aldrich (500-800 U / mL).• FPM I NBPT (as PS): In the case of a liquid, 80pL of the raw material of interest are placed in a 5mL bottle using a micropipette. It is diluted using 4mL of DMSO. This solvent has been chosen as it does not inhibit the urease activity or the ammonia formation. In the case of a solid, 80pg of the raw material of interest are weighed with a precision scale and placed in a 5mL bottle. It is diluted using 4mL of DMSO.

[0083] Test method:The test is performed in optical plate reader with 96-well plates. Ammonia formation with the combination of urea and urease in case of no inhibitor addition, alters the pH of the solution, which changes the color yellow to pink. The color change, as indirect indicator for ammonia formation, is then detected and measured by the optic lenses and the output of optical density (560 nm) vs time graph is generated.1. 10pl of fragrance raw material (FPM), NBPT (PS), and DMSO (NS) is added to wells.2. Following, the urease is added with the amount of 20pl (distilled water for the blank samples).3. 170 pl of MasterMix, containing urea substrate, is added to the mixture in the well, and shaked wellThe reaction may start rapidly, the plate should be inserted to the plate reader before the color change.Protocol procedure:The test is conducted for 1 hour time scale under the set temperature of 24°C. Read is performed as kinetic at 560 nm. Interval measurement is 1 min.Table 1: Final concentrations in the assay:FRM / NPBT 0.1% (FRMs) up to 0.5%(FRA) urea 1 g / L urease 2 U / mLPBS 1x total volume 200 pLInhibition value:The rate of reaction is derived from the color change (A Absorbance at 560nm) over time:The inhibition efficacy is then calculated as follows:

[0084] Identification of positive hitsFig. 1 represents a typical result from the screening assay. The corresponding calculations are shown in table 2. In this case, the fragrance raw material shows a significant inhibition of the enzyme urease.Table 2: Results screening assaySamples A Absorbance at 1h Inhibition(560nm)Positive control, with inhibitor0.00 1.00(NBPT)

[0085] Positive hitsA total of 56 highly active compounds could be identified through in vitro screening. Interestingly, they share common structural features like a molecular weight between 95 to 250 g / mol, are acetal, alcohols, hydrocarbon, aldehydes, ketones, ethers, esters, lactone, phenol.Table 3: Highly active compoundsDAMASCENONE KETONE 0.89HEXENYL SALICYLATE CIS-3 ESTER 0.88HEXENYL ISOBUTYRATE CIS-3 ESTER 0.88LIMONENE D nat HYDROCARBON 0.99HEXENYL PROPIONATE CIS-3 ESTER 0.862-METHYL-5-PROPYL-2- KETONE 0.85CYCLOHEXENONEEUGENOL PHENOL 0.84OCIMENE HYDROCARBON 0.84GERANIOL ALCOHOL 0.83CARVYL ACETATE CIS- ESTER 0.83JASMOL ALCOHOL 0.82CETALEAF ACETAL 0.81METHYL CYCLOPENTENOLONE-3,2,2 KETONE 0.81HEXENYL ISOVALERATE CIS-3 ESTER 0.80HEXENYL ACETATE CIS-3 ESTER 0.78HEXENYL BUTYRATE CIS-3 ESTER 0.78METHYL IONONE ALPHA / IFF KETONE 0.77CAREN DELTA-3 HYDROCARBON 0.66HIMACHALEN BETA HYDROCARBON 0.69CITRAL ALDEHYDE 0.70DAMASCONE ALPHA KETONE 0.68HEXENOL CIS-3 ALCOHOL 0.64HEXYL CINNAMIC ALDEHYDE ALPHA ALDEHYDE 0.63METHYL ETHYL HYDROXYFURANONE HETEROCYCLIC 0.61 VERTOCITRAL ALDEHYDE 0.56METHYL HEPTENONE-6,5,2 KETONE 0.55CYCLAMEN ALDEHYDE ALDEHYDE 0.54TERPINENE GAMMA HYDROCARBON 0.52ISORALDEINE KETONE 0.50IONONE BETA KETONE 0.50LIGUSTRAL ALDEHYDE 0.48HEXENOL TRANS-2 ALCOHOL 0.45HEXENYL CAPROATE CIS-3 ESTER 0.45FLOROSA ALCOHOL 0.44CINNAMIC ALCOHOL ALCOHOL 0.43MELONAL ALDEHYDE 0.43HEXENAL TRANS-2 ALDEHYDE 0.96ALDEHYDE C12 MNA ALDEHYDE 0.38FLORAZON ALDEHYDE 0.37LILIAL ALDEHYDE 0.32NEROLIN YARA YARA ETHER 0.32PINEN ALPHA HYDROCARBON 0.73CITRAL ALDEHYDE 0.32NEROL ALCOHOL 0.310086] Another list of ingredients also showed very good behaviour

[0087] Raw material screeningFragrance raw materials are used in a concentration of 0.1% based on total FRA amount of 4%. Reduction of ammonia formation is based on urease inhibition plus additional chemical reaction over time to remove formed ammonia if urease is not fully inhibited. Figures 2 and 3 show the results.

[0088] Accord screening Concentration accords: total fragrance composition concentration in rim block is 4%. Accord is added up to 1.2% of total FRA amount, meaning 30% of total FRA consists of accord. Remaining percentage is filled up with DPG. Figures 4, 5 and 6 show the results. Accord compositionAccord AB name amountDYNASCONE 5CITRAL 5EUCALYPTOL 50HEXENYLACETAT CIS-3 2.5M ELONAL 1LIMONEN 906.5VERTOCITRAL 30 total 1000Accord AC name amountCITRAL 40DYNASCONE 4GERANIAL 10OCIMEN 5LIMONEN 906TERPINEN GAMMA 35 total 1000Accord AD name amountFURAMINTON / TONKALACTONE™ 5LINALOOL 978MELONAL 10OCIMEN 5MIXTURE OF Cis-Carvyl acetate, Trans-Carvyl acetate, 1,6-Dihydro-carvyl acetate,1,6-Dihydro-neo-carveol 2 total 1000Example 2Rim blocks

[0089] In 250 mL Duran bottles, 47 mL urea solution (50 g / L, pH: 5.0) is added. Then 500 mg rim block mass, containing FRA or EDTA or NBPT is added. The reaction is started by adding 500 pL urease (500-800 U / mL) under stirring (80 rpm). The rim block mass should not touch the stirring fish. Figure 2 shows a typical setup. The ammonia concentration is determined analytically using a sensitive ammonia device. As measuring times 15 min - 2h - 4h - 6h- 24h - 26h and 30 h are chosen. The measurement is stopped as soon as the steady state is reached. Figure 1 shows a typical development.For negative control the rim block mass contains DPG as filler (The efficiency of DPG was tested beforehand - no inhibition observable on analytical scale assay and in rim block base)For positive Control 0.1% Neofresh Ammonia (contains 0.025% NBPT) in incorporated into the rim block with 3.9% DPGTest samples contain between 0.1% - 1% EDTA or 0.1% - 4% FRMs. Each time when 4% amount of material is not reached the remaining amount is filled with DPG.Accords consisting of best performer FRMs from enzymatic assay are incorporated into rim block base in different concentrations from 0.1% -4% to prove concentration dependent inhibition properties.

[0090] Example 3 Synergistic behavior

[0091] With addition of FRA accord AC comparable inhibition efficiency could be obtained as with 1% EDTA. Reduction of non-biodegradable EDTA possible due to synergism of accord and EDTA.

[0092] Example 4 Synergistic behaviour

[0093] Combination of spray-dried EDTA and FRA accord leads to 3.3 fold increase of activity compared to FRA accord alone.Combination of lower EDTA (0.2% in spray-dried formulation) and FRA accord AD lead to comparable inhibition as 1% EDTA (PosC).

[0094] Example 5 synergistic behaviorSynergism can be observed by combining accord and non-FRA material NBPT. A comparable inhibition can be observed as with NBPT in higher concentrations alone. It allows to reduce the proportion of the CMR substance NBPT and to compensate the reduced efficacy by adding the FRA accord due to synergism, whereby the toxicity of the system is significantly reduced.

Claims

CLAIMS1. Use of a mixture consisting of(a) at least one fragrance raw material and(b) EDTA and / or NBPT for inhibiting urease.

2. The use according to claim 1, wherein the fragrance raw material is selected from fragrance raw materials having a molecular weight between 95 to 250 g / mol and essential oils.

3. The use according to claim 1 and / or 2, wherein the fragrance raw materials having a molecular weight between 95 to 250 g / mol are selected from the group consisting of cis-1 -(1 -Ethoxyethoxy)-3-hexene (leaf acetal), 3,7-Dimethylocta-2,6-dien-1 -ol, Cinnamyl alcohol, 4-Methyl-2-(2-methylpropyl)oxan-4-ol, Trans-2-Hexenol, Cis-3-Hexenol, 2-Benzylheptanol, Geraniol, Furaneol, Citral, 3-(4-Tert-butylphenyl)butanal, 3-(4-Ethylphenyl)-2,2-dimethylpropanal,3-(2-Ethylphenyl)-2,2-dimethylpropanal, Aldehyde C12,(±)-2,6-Dimethyl-5-heptenal, (Z,E)-2,4-dimethyl cyclohex-3-ene-1 -carbaldehyde, Cyclamen aldehyde, (Z,E)-2,4-dimethyl cyclohex-3-ene-1 -carbaldehyde (68039-49-6; 68737-61-1; Ligustral, Tripalal, Cyclal C, Vertocitral), Alpha-hexyl cinnamaldehyde, (2E)-3,7-Dimethylocta-2,6-dienal, 3-(4-Ethylphenyl)-2,2-dimethylpropanal, Helional,Cis-3-hexenyl hexanoate, Cis-3-hexenyl butyrate, Cis-3-hexenyl acetate,Cis-3-Hexenyl isovalerate, Cis-Carvyl acetate, Trans-Carvyl acetate, 1,6-Dihydro-carvyl acetate , 1,6-Dihydro-neo-carveol, Cis-3-hexenyl propionate, Cis-3-hexenyl isobutyrate, Cis-3-hexenyl salicylate, Nerolin Yara Yara,5-Ethyl-3-hydroxy-4methyl-2(5 / - / )-furanon (698-10-2), Terpinene gamma, Ocimene, Beta Ionone,N-methyl ionone, Methyl heptanone, Alpha Damascene, Alpha-methyl ionone, Methyl cyclopentenolone, 2-Methyl-5-propyl-2-Cyclohexenone„ Beta-damascenone, 1 -(5,5-Dimethyl-1 -cyclohexenyl)pent-4-en-1 -one, Dimethyl benzofuranone and Eugenol.

4. The use according to claim 1 and / or 2, wherein the fragrance raw materials having a molecular weight between 95 to 250 g / mol are selected from the group consisting ofcis-1 -(1 -Ethoxyethoxy)-3-hexene (leaf acetal), 3,7-Dimethylocta-2,6-dien-1 -ol, Cinnamyl alcohol, 4-Methyl-2-(2-methylpropyl)oxan-4-ol, Trans-2-Hexenol, Cis-3-Hexenol, 2-Benzylheptanol, Geraniol, Furaneol, Citral, 3-(4-Tert-butylphenyl)butanal, 3-(4-Ethylphenyl)-2,2-dimethylpropanal,3-(2-Ethylphenyl)-2,2-dimethylpropanal, Aldehyde C12, Trans-2-Hexenal, (±)-2,6-Dimethyl-5-heptenal, (Z,E)-2,4-dimethyl cyclohex-3-ene-1 -carbaldehyde, Cyclamen aldehyde, (Z,E)-2,4-dimethyl cyclohex-3-ene-1 -carbaldehyde (68039-49-6; 68737-61-1; Ligustral, Tripalal, Cyclal C, Vertocitral), Alpha-hexyl cinnamaldehyde, (2E)-3,7-Dimethylocta-2,6-dienal, 3-(4-Ethylphenyl)-2,2-dimethylpropanal, Helional, Cis-3-hexenyl hexanoate, Cis-3-hexenyl butyrate, Cis-3-hexenyl acetate, Cis-3-Hexenyl isovalerate, Cis-Carvyl acetate, Trans-Carvyl acetate, 1,6-Dihydro-carvyl acetate , 1,6-Dihydro-neo-carveol, Cis-3-hexenyl propionate, Cis-3-hexenyl isobutyrate, Cis-3-hexenyl salicylate, Nerolin Yara Yara, 5-Ethyl-3-hydroxy-4methyl-2(5 / - / )-furanon (698-10-2), Terpinene gamma, Ocimene, Beta Ionone,N-methyl ionone, Methyl heptanone, Alpha Damascene, Alpha-methyl ionone, Methyl cyclopentenolone, 2-Methyl-5-propyl-2-Cyclohexenone„ Beta-damascenone, 1 -(5,5-Dimethyl-1 -cyclohexenyl)pent-4-en-1 -one, Dimethyl benzofuranone and Eugenol.

5. The use according to claim 1 and / or 2, wherein the essential oil comprises at least one of the following compounds as main ingredients: Eucalyptol, Geranial, Citronellol, Linalool, alpha-Pinen (80-65-8), beta-Pinen (127-91-3), Eugenol, (1 E,6E,8S)-1 -methyl-5- methylidene-8-propan-2-ylcyclodeca-1,6-diene (23986-74-5, Germacren D), 4,8- dimethyl-2-propan-2-ylidene-3,3a,4,5,6,8a-hexahydro-1 H-azulen-6-ol (68129-81 -7, Vetiverol), (1 R,3R,6S)-2,2,6,8-Tetramethyl-tricyclo[5.3.1 ,03,8]undec-3-ol (5986-55-0, Patchouli alcohol), p-Mentha-1,8-dien (5989-27-5, Limonen D), (+)-3-Caren, (1 S)-3,7,7- Trimethyl-bicyclo[4.1.0]hept-3-en (498-15-7, delta-3-Caren), 2,5,9,9-tetramethyl- 3,4,6,7,8,9a-hexahydrobenzo[7]annulene (1461 -03-6, Himachalen beta)6) The use according to claim 1 and / or 2, wherein the fragrance raw material comprises at least one of the group consisting of7) The use according to at least one of the preceding claims, wherein the test result for the inhibition rate according to the described test is a 1 (>0.3 and <0.5), 2 (>0.5 and <0.75), 3 (>0.75 and <0.9) or 4 (>0.9), preferably a 2, 3 or 4, more preferably a 3 or 4, and most preferably a 4.8) The use according to claim 1 and / or 2, wherein the fragrance raw material is selected from the group consisting ofZIMTALDEHYDE9) The use according to claim 1 and / or 2, wherein the fragrance raw material is selected from the group consisting of10) The use according to claim 1 and / or 2, wherein the fragrance raw material is selected from the group consisting of1 1) The use according to claim 1 and / or 2, wherein the fragrance raw material is selected from the group consisting of12) The use according to claim 1 and / or 2, wherein the fragrance raw material is selected from the group consisting ofLIGUSTRAL13. The use according to at least one of the preceding claims, wherein the amount of the at least one fragrance raw material is of from 0.0005 to 99.9995, preferably from 0.005 to 99.995, more preferably from 25 to 99.99 and most preferably from 50 to 99.9 weight percent, calculated on the total amount of the mixture.

14. The use according to at least one of the preceding claims, wherein the amount of EDTA is of from 0.01 to 75 weight percent, preferably from 0.1 to 50 and more preferably from 1.0 to 35 calculated on the total amount of the mixture.

15. The use according to at least one of the preceding claims, wherein the amount of NBPT is of from 0.0000001 to 25 weight percent, calculated on the total amount of themixture, preferably 0.00001 to 20 weight percent, more preferably 0.0001 to 10 weight percent and most preferably 0.001 to 2 weight percent.

16. The use according to at least one of the preceding claims, wherein the ratio of the at least one fragrance raw material to EDTA is from 1 :20 to 100:1, preferably from 1:10 to 50:1, more preferably from 1 :5 to 25:1 by weight.

17. The use according to at least one of the preceding claims, wherein the ratio of the at least one fragrance raw material to NBPT is from 10000:1 to 1 :5, preferably from 1000:1 to 1:2 more preferably from 200:1 to 1 :1 by weight and most preferably from 200:1 to 30:1.

18. The use according to at least one of the preceding claims, wherein one or more of the components are microencapsulated, spray-dried, as inclusion complexes, or as extrusion products, preferably the fragrance raw material and / or the EDTA, more preferably only the EDTA.

19. The use according to at least one of the preceding claims, wherein the mixture is in liquid form, preferably undiluted, more preferably diluted with a solvent and even more preferably diluted with a solvent selected from the group consisting of ethanol, isopropanol, diethylene glycol monoethyl ether, glycerol, propylene glycol, 1 ,2- butylene glycol, dipropylene glycol, isopropylidenglycerin diethyl phthalate, triethyl citrate, isopropyl myristate, triacetin, 2,2-dimethyl-1,3-dioxolane-4-methanol and diacetin and most preferably diluted with triethylcitrat.

20. A personal care composition comprising the mixture consisting of(a) at least one fragrance raw material and(b) EDTA and / or NBPT.

21. The personal care composition of claim 20, wherein the(a) at least one fragrance raw material and(b) EDTA are present in a ratio from 1 :20 to 100:1, preferably from 1 :10 to 50:1, more preferably from 1 :5 to 25:1 by weight.

22. The personal care composition of claim 20, wherein the(a) at least one fragrance raw material and(b) NBPT are present from 10000:1 to 1 :5, preferably from 1000:1 to 1 :2 more preferably from 200:1 to 1 :1 by weight and most preferably from 200:1 to 30:1 .

23. A home care composition comprising the mixture consisting of(a) at least one fragrance raw material and(b) EDTA and / or NBPT.

24. The home care composition of claim 23, wherein the(a) at least one fragrance raw material and(b) NBPT are present in a ratio from 10000:1 to 1:5, preferably from 1000:1 to 1 :2 and most preferably from 200:1 to 1 :1 by weight.

25. The home care composition of claim 23, wherein the(a) at least one fragrance raw material and(b) EDTA are present in a ratio from 1 :20 to 100:1, preferably from 1 :10 to 50:1, more preferably from 1 :5 to 25:1 by weight.

26. A pet care composition comprising the mixture consisting of(a) at least one fragrance raw material and(b) EDTA and / or NBPT.

27. The pet care composition of Claim 26, wherein the(a) at least one fragrance raw material and(b) NBPT are present in a ratio from 10000:1 to 1 :5, preferably from 1000:1 to 1:2 more preferably from 200:1 to 1 :1 by weight and most preferably from 200:1 to 30:1.

28. The pet care composition of Claim 26, wherein the(a) at least one fragrance raw material and(b) EDTAare present in a ratio from 1 :20 to 100:1, preferably from 1 :10 to 50:1, more preferably from 1 :5 to 25:1 by weight.

29. The personal care, home care or pet care composition according to any of the claims 20 to 28, wherein the composition does not contain any further urease inhibitor.

30. The personal care, home care or pet care composition according to any of the claims 20 to 28, wherein the fragrance raw material is selected from fragrance raw materials having a molecular weight between 95 to 250 g / mol and essential oils.

31. The personal care, home care or pet care composition according to any of the claims 20 to 28, wherein the fragrance raw material is selected from the molecules having a test result of 4.

32. The personal care, home care or pet care composition according to any of the claims 20 to 28, wherein the fragrance raw material is selected from the molecules having a test result of 3.

33. A method for inhibiting urease activity in a personal care, home care or pet care composition, wherein a mixture consisting of(a) at least one fragrance raw material and(b) EDTA and / or NBPT is added to the personal care, home care or pet care composition.

34. The method according to claim 29, wherein the mixture is added in an amount of from 0.01 to 10 weight percent to the personal care, home care or pet care composition, calculated on the total weight of the personal care, home care or pet care composition.

35. The home care composition of claim 23 and / or 25, wherein the homecare composition is a rim block or an All-purpose cleaner (APC) used in water of more than 7° Hardness, preferably more than 10°, and more preferably more than 14°.

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