Water-soluble unit dose article

1. A water-soluble unit dose article comprising a water-soluble film and a liquid laundry detergent composition,

wherein the liquid laundry detergent composition comprises between about 10% and about 30%, by weight of the liquid laundry detergent composition, of a first anionic surfactant,

wherein the first anionic surfactant is an alkyl sulphate anionic surfactant comprising at least one alkoxylated alkyl sulphate or a mixture of at least one alkoxylated alkyl sulphate and at least one non-alkoxylated alkyl sulphate;

wherein the first anionic surfactant comprises a mixture of branched and linear alkyl chains wherein the alkyl chains have a weight average degree of branching of 55%;

wherein the first anionic surfactant comprises a distribution of alkyl chain lengths with an average carbon number for said alkyl chains of between about 10 and about 18 carbons,

wherein the first anionic surfactant comprises a distribution of alkoxylate chains, and wherein the mol average alkoxylate chain length is between about 0.5 and about 7;

wherein the liquid laundry detergent composition further comprises a second anionic surfactant, wherein the second anionic surfactant is linear alkyl benzene sulphonate;

wherein the liquid laundry detergent composition further comprises between about 10% and about 40%, by weight of the liquid laundry detergent composition, comprising a material selected from the group consisting of 1,2 propane diol, dipropylene glycol, glycerol, tripropylene glycol, sorbitol, polypropylene glycol, and mixtures thereof;

wherein the liquid laundry detergent composition further comprises chelant;

wherein the liquid laundry detergent composition further comprises between about 0.5% and about 15%, by weight of the liquid laundry detergent composition, of water; wherein the first anionic surfactant is manufactured from a synthesized alcohol made following the Ziegler process, OXO-process, modified OXO-process, the Fischer Tropsch process, Guerbet process and mixtures thereof; and

wherein the water-soluble film comprises polyvinyl alcohol polymer or copolymer.

2. The water-soluble unit dose article according to claim 1 , wherein the first anionic surfactant comprises a distribution of alkyl chain lengths with an average carbon number for said alkyl chains of between about 12 and 15 carbons.

3. The water-soluble unit dose article according to claim 1 , wherein the first anionic surfactant comprises a distribution of alkoxylate chains, and wherein the mol average alkoxylate chain length is between about 2 and 4.

4. The water-soluble unit dose article according to claim 1 wherein the weight ratio of the second anionic surfactant to the first anionic surfactant is from 1:10 to 10:1.

5. The water-soluble unit dose article according to claim 1 wherein the liquid laundry detergent composition comprises between about 5% and about 60%, by weight of the liquid laundry detergent composition of non-soap anionic surfactant.

6. The water-soluble unit dose article according to claim 1 wherein the liquid laundry detergent composition comprises a non-ionic surfactant, wherein the non-ionic surfactant is selected from a natural oil derived alcohol alkoxylate, a Ziegler-synthesised alcohol alkoxylate, an oxo-synthesised alcohol alkoxylate, Guerbet alcohol alkoxylates, alkyl phenol alcohol alkoxylates or a mixture thereof.

7. The water-soluble unit dose article according to claim 6 wherein the liquid laundry detergent composition comprises between about 0% and about 15%, by weight of the liquid laundry detergent composition of the non-ionic surfactant.

8. The water-soluble unit dose article according to claim 1 wherein the liquid detergent composition comprises between about 1.5% and about 20%, by weight of the liquid laundry detergent composition of a fatty acid salt.

9. The water-soluble unit dose article according to claim 1 , wherein the water-soluble film comprises a blend of polyvinylalcohol polymers and/or polyvinylalcohol copolymers.

10. The water-soluble unit dose article according to claim 1 wherein the liquid laundry detergent composition has a pH between about 6 and about 10, wherein the pH of theliquid laundry detergent composition is measured as a about 10% dilution in demineralized water at about 20° C.