Liquid detergent composition
The present invention provides a liquid detergent composition comprising an effective amount of an enzyme, 0.001-3% wt of a perfume ingredient, and 0.005-2% wt of an anti-oxidant. It has been found that the storage stability of the enzyme—which is preferably a protease—can be drastically improved by the addition of the anti-oxidant.
1. A liquid detergent composition comprising:
(a) a cleaning effective amount of a proteolytic enzyme;
(b) 0.001% to 3% by weight of a perfume composition, wherein the perfume composition comprises at least 0.01% by weight based on the liquid composition of a perfume component selected from terpenes, ketones, aldehydes and mixtures thereof; and
(c) 0.01% to 0.08% by weight of an antioxidant,
wherein the antioxidant is 2,6-dit-tert-butyl-hydroxy toluene.
2. A liquid composition according to claim 1 , wherein the enzyme is present at a concentration of from 0.001 mg to 3 mg of the enzyme per gram of liquid composition.
3. A liquid composition according to claim 1 , wherein the perfume composition is present at a concentration of from 0.01 to 2% by weight.
4. A liquid composition according to claim 1 , wherein said perfume composition comprises at least 5% by weight, based on the liquid composition, of a perfume component.
5. A liquid composition according to claim 1 , wherein the perfume composition comprises a perfume component, which is a terpene selected from the group consisting of terpinolene, gamma-terpinene, and pinane.
6. A liquid composition according to claim 1 , wherein the perfume composition comprises a perfume component, which is an aldehydic perfume selected from the group consisting of trifernal, lilial, citronellal, cyclosal, heliopropanal, zestover, aldehyde C12, tridecylenicaldehyde, cyclosia base, and octenal.
7. A liquid composition according to claim 1 , wherein the perfume composition comprises a perfume component, which is a ketone selected from the group consisting of pulegone, vertofix coeur, veloutone, alpha-methylionone, and damascenone.
8. A liquid composition according to claim 1 , wherein the antioxidant is present in an amount of 0.05% by weight.
9. A method of cleaning a fabric substrate, comprising treating a fabric substrate with the liquid composition of claim 1 in an aqueous environment, rinsing the substrate and drying the substrate.