Detergent compositions
View Patent ↗An anionic surfactant particle for use in laundry detergent compositions has an anionic surfactant content of at least 95 wt % of anionic surfactant and comprises linear alkylbenzene sulphonate (LAS) and primary alcohol sulphate (PAS) in a weight ratio of from 5:1 to 1:3. The particle, which is preferably in the form of a flake, is of low hygroscopicity and dissolves rapidly in water.
1. An anionic surfactant particle for use in a laundry detergent composition, the particle having a total anionic surfactant content of at least 95 wt % and consisting of linear alkylbenzene sulphonate (LAS) and primary alcohol sulphate (PAS) in a weight ratio of from 5:1 to 1:3, sodium carbonate, and water.
2. An anionic surfactant particle as claimed in claim 1 , having a total anionic surfactant content of at least 98 wt %.
3. An anionic surfactant particle as claimed in claim 1 , wherein the ratio of LAS to PAS is within the range of from 3:1 to 1:2.
4. An anionic surfactant particle as claimed in claim 1 , wherein the PAS has an average alkyl chain length within the range of from C 10 to C 16 , preferably from C 12 to C 14 .
5. An anionic surfactant particle as claimed in claim 1 , wherein the anionic surfactants are in sodium salt form.
6. An anionic surfactant particle as claimed in claim 1 , which is the form of a flake.
7. A particulate detergent composition which comprises
(a) a base powder composed of composite granules comprising surfactant and builder,
(b) anionic surfactant particles as claimed in claim 1 ,
(c) optionally postdosed detergent ingredients.
8. A particulate detergent composition as claimed in claim 7 , having a total anionic surfactant content of at least 20 wt %.