Concentrated surfactant composition
Concentrated surfactant compositions, and more specifically, concentrated low pH compositions comprising sulfated surfactants. Methods of making and using the same.
1. A concentrated surfactant composition comprising:
a. from about 50% to about 80% by weight substantially neutralized anionic sulfated surfactant,
wherein the anionic sulfated surfactant is alkyl ethoxylated sulfate (AES),
the AES comprising an alkyl group that contains from about 12 to about 18 carbon atoms, and
the AES comprising a polyethyoxylate chain containing from about 1 to about 4 ethoxylate moieties;
b. from about 12% to about 22% of a water-soluble organic acid, wherein the organic acid is lactic acid; and
c. a neutralizing agent, wherein the neutralizing agent is selected from alkali metal hydroxides, alkali earth metal hydroxides, ammonium hydroxides, and mixtures thereof;
wherein the composition has a pH of from about 3 to about 5 when measured in an aqueous 10% solution of the composition, and
wherein the surfactant composition has a viscosity of less than about 50 Pa*s measured at 1 s −1 and at 30° C. and wherein the lactic acid is present in its free acid form and its salt in a molar ratio from about 5:1 to about 1:5.
2. The concentrated surfactant composition according to claim 1 , wherein the surfactant composition comprises from about 55% to about 70% by weight of the surfactant composition sulfated surfactant.
3. The concentrated surfactant composition according to claim 1 , wherein the surfactant composition further comprises from about 0.1% to about 15% by weight of the surfactant composition of an organic solvent.
4. The concentrated surfactant composition according to claim 1 , wherein the surfactant composition contains no nonionic surfactant that has been deliberately added to the composition other than, if any, as an impurity in another material that was deliberately added.
5. The concentrated surfactant composition according to claim 1 , wherein the surfactant composition further comprises from about 10% to about 45% by weight of the composition of water.
6. The concentrated surfactant composition according to claim 1 , wherein the surfactant composition has a reserve alkalinity of from about 0.5 to about 7.5 equivalent grams NaOH per 100 grams of concentrated composition, wherein the reserve alkalinity is determined by titrating a 1% (w/v) solution of surfactant composition with hydrochloric acid to pH 3.0 at 21° C.
7. A detergent composition comprising the concentrated composition of claim 1 , and further comprising a detergent adjunct.
8. A method for preparing a detergent composition, comprising the following steps:
a. providing the concentrated surfactant composition of claim 1 ; and
b. mixing the surfactant composition with water, detergent adjuncts, or mixtures thereof to form a detergent composition.
9. The concentrated surfactant composition according to claim 1 , the composition comprising
from about 15% to about 25% water.
10. A concentrated surfactant composition according to claim 1 , wherein if the composition comprises any fatty acid, the fatty acid is present only as an impurity in another material that is deliberately added to the composition.