Low sulfate surfactant composition
The invention is directed to a hydratable concentrated surfactant composition. The composition is pourable, easy to dilute, substantially free of sulfate and oil, comprises a C 6 -C 14 acid, alcohol or both, an anionic surfactant comprising acyl isethionate and an amphoteric surfactant, zwitterionic surfactant or both. The composition is in lamellar phase and thickens and transforms to an isotropic phase upon dilution. The composition can be used as a concentrate in small volumes and diluted as used and needed or can be diluted with water in refill packaging to ensure a reduction in plastic waste.
1 . A method for making an end use composition comprising the steps of combining:
a) a hydratable concentrated surfactant composition having a viscosity from 250 to 7,500 cps wherein the composition comprises:
i) an anionic surfactant comprising acyl isethionate and acyl taurate the acyl isethionate making up from 15 to 85% by weight of the total weight of anionic surfactant;
ii) an amphoteric and/or zwitterionic surfactant;
iii) a C 6 -C 14 acid or alcohol;
iv) humectant and fragrance;
v) from 30 to 85% by weight water; and
b) water; and
c) producing the end use composition
wherein the hydratable concentrated surfactant composition and water are combined at a weight ratio from 1:3 to 1:6 to produce the end use composition, the end use composition having a viscosity from 3,000 to 15,000 cps and less than 3.0% by weight sulfate and further wherein the hydratable concentrated surfactant composition further comprises an inorganic salt, a polymeric viscosity aid, lauric acid or a mixture thereof.
2 . The method according to claim 1 wherein the hydratable concentrated surfactant composition further comprises a vitamin.
3 . The method according to claim 1 wherein the anionic surfactant comprising an acyl isethionate and acyl taurate further comprises an additional anionic surfactant.
4 . The method according to claim 3 wherein the additional anionic surfactant is an acyl glycinate or a mixture thereof.
5 . The method according to claim 1 wherein 15 to 80% by weight of the anionic surfactant is acyl isethionate and the polymeric viscosity aid is present and comprises PEG 150 pentaerythritol tetrastearate.
6 . The method according to claim 1 wherein the acyl taurate comprises sodium methyl cocoyl taurate, sodium methyl lauroyl taurate or a mixture therefore and the acyl isethionate comprises sodium lauroyl isenthionate, sodium cocyl isethionate or a mixture thereof.
7 . The method according to claim 1 wherein the zwitterionic surfactant is cocamidopropyl betaine and the acid is present and is lauric acid and the hydratable concentrated surfactant composition does comprise 0.01 to 0.8% by weight of the polymeric viscosity aid.
8 . The method according to claim 1 wherein the anionic surfactant in the hydratable concentrated surfactant composition and end use composition is acyl isethionate and acyl taurate.
9 . The method according to claim 8 wherein the anionic surfactant makes up from 0.8 to 20% by weight of the hydratable concentrated surfactant composition.