A malodor-counteracting composition comprising (i) a salt of general formula (I) R1R2R3R4N+X− (I) wherein R1, R2, R3, R4 are independently selected from C1-4 alkyl, or R1, R2, R3, R4 may together constitute a nitrogen-containing cyclic system in which the nitrogen is part of a pyridinium or an imid
A malodor-counteracting composition comprising (i) a salt of general formula (I) R1R2R3R4N+X− (I) wherein R1, R2, R3, R4 are independently selected from C1-4 alkyl, or R1, R2, R3, R4 may together constitute a nitrogen-containing cyclic system in which the nitrogen is part of a pyridinium or an imidazolinium ring; and X− is a counterion characterized by its protonated form having an acidity constant (pKa) lying between 1 and 6; and (ii) an alpha, beta-unsaturated carbonyl compound of the general formula R5R6C═CR7C(═O)YR8 (II) wherein R5, R6, R7 and R8 are independently selected from hydrogen and C1-10 hydrocarbyl residues which may be saturated, unsaturated, aromatic, cyclic, branched or unbranched, and are optionally substituted, or R5, R6, R7 and R8 may together constitute a cyclic system and Y is oxygen or a single covalent bond, with the proviso that Y is a covalent bond when R8 is hydrogen. The composition may be incorporated into consumer products and is able to remove malodors from the air or from surfaces.
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1. A malodour-counteracting composition comprising (i) a salt selected from tetrabutylammonium acetate, tetrabutylammonium benzoate and tetraethylammonium benzoate; and(ii) an alpha, beta-unsaturated carbonyl compound comprising a fumarate, in which the fumarate comprises dihexyl fumarate, wherein t
1. A malodour-counteracting composition comprising (i) a salt selected from tetrabutylammonium acetate, tetrabutylammonium benzoate and tetraethylammonium benzoate; and(ii) an alpha, beta-unsaturated carbonyl compound comprising a fumarate, in which the fumarate comprises dihexyl fumarate, wherein the malodour is a thiol malodour, andwherein the weight ratio of the salt to that of the alpha, beta-unsaturated carbonyl compound is from 1:1000 to 1:5. 2. The composition according to claim 1, wherein the salt comprises tetrabutylammonium acetate. 3. The composition according to claim 1, in which the weight ratio of the salt to that of the alpha, beta-unsaturated carbonyl compound is from 1:1000 to 1:20. 4. The composition according to claim 1, in which the weight ratio of the salt to that of the alpha, beta-unsaturated carbonyl compound is from 1:500 to 1:20. 5. The composition according to claim 1, in which the weight ratio of the salt to that of the alpha, beta-unsaturated carbonyl compound is from 1:300 to 1:30. 6. The composition according to claim 5, in which the salt is at least one of tetrabutylammonium acetate, tetrabutylammonium benzoate and tetraethylammonium benzoate; the alpha, beta-unsaturated carbonyl compound is dihexyl fumarate; and the weight ratio of the salt to dihexyl fumarate is from 1:300 to 1:30. 7. A consumer product, comprising a consumer product base and an effective amount of a malodour-counteracting composition according to claim 1. 8. A malodour-absorbing perfume containing at least 0.075% w/w, based on the perfume, of at least one alpha, beta-unsaturated carbonyl compound comprising dihexyl fumarate, together with at least one salt selected from tetrabutylammonium acetate, tetrabutylammonium benzoate and tetraethylammonium benzoate having a solubility in the perfume of at least 100 ppm by weight at 25° C., where the malodour is a thiol malodour, and wherein the weight ratio of the salt to that of the alpha, beta-unsaturated carbonyl compound is from 1:300 to 1:30. 9. The perfume of claim 8, wherein the solubility in the perfume of the salt is at least 200 ppm by weight at 25° C. 10. The perfume of claim 8, containing at least 0.1% w/w, based on the perfume, of at least one alpha, beta-unsaturated carbonyl compound. 11. A method of counteracting malodour in the atmosphere or on a substrate, comprising the application to the atmosphere or substrate of the composition according to claim 1, wherein the malodour is a thiol malodour. 12. A method for removing malodour from the air, comprising treatment of the air directly or indirectly, the latter via the treatment of a substrate comprising a hard surface, fabric, hair or skin in contact with the air, the method comprising the exposure to the air or the application to a substrate of a consumer product incorporating an effective amount of a malodour-counteracting composition according to claim 1. 13. A malodour-counteracting composition comprising (i) a salt selected from tetrabutylammonium acetate, tetraethylammonium benzoate, and tetrabutylammonium benzoate; and(ii) an alpha, beta-unsaturated carbonyl compound comprising citral, damascone, ethyl decadienoate, or nonadienal,wherein the malodour is a thiol malodour, andwherein the weight ratio of the salt to that of the alpha, beta-unsaturated carbonyl compound is from 1:1000 to 1:5. 14. The malodour-counteracting composition of claim 13, wherein the salt is selected from tetrabutylammonium acetate and tetrabutylammonium benzoate. 15. The malodour-counteracting composition of claim 13, wherein the salt comprises tetrabutylammonium benzoate. 16. A consumer product, comprising a consumer product base and an effective amount of the malodour-counteracting composition according to claim 13. 17. A method of counteracting malodour in the atmosphere or on a substrate, comprising the application to the atmosphere or substrate of the composition according to claim 13. 18. A method for removing malodour from the air, comprising treatment of the air directly or indirectly, the latter via the treatment of a substrate comprising a hard surface, fabric, hair or skin in contact with the air, the method comprising the exposure to the air or the application to a substrate of a consumer product incorporating an effective amount of a malodour-counteracting composition according to claim 13. 19. A malodour-absorbing perfume containing at least 0.075% w/w, based on the perfume, of at least one alpha, beta-unsaturated carbonyl compound comprising citral, damascone, ethyl decadienoate, or nonadienal, together with at least one salt selected from tetrabutylammonium acetate, tetraethylammonium benzoate, and tetrabutylammonium benzoate having a solubility in the perfume of at least 100 ppm by weight at 25° C., where the malodour is a thiol malodour, and wherein the weight ratio of the salt to that of the alpha, beta-unsaturated carbonyl compound is from 1:300 to 1:30. 20. The perfume of claim 19, wherein the solubility in the perfume of the salt is at least 200 ppm by weight at 25° C. 21. The perfume of claim 19, containing at least 0.1% w/w, based on the perfume, of the at least one alpha, beta-unsaturated carbonyl compound. 22. The malodour-counteracting composition of claim 13, in which the weight ratio of the salt to that of the alpha, beta-unsaturated carbonyl compound is from 1:1000 to 1:20. 23. The malodour-counteracting composition of claim 13, in which the weight ratio of the salt to that of the alpha, beta-unsaturated carbonyl compound is from 1:500 to 1:20. 24. The malodour-counteracting composition of claim 13, in which the weight ratio of the salt to that of the alpha, beta-unsaturated carbonyl compound is from 1:300 to 1:30.
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