Use of tertiary amine to control rheology of unit dose detergent pack

1. A unit dose detergent pack comprising:

a pouch made of a water-soluble film; and

a liquid detergent composition encapsulated within said pouch, wherein said liquid detergent composition comprises

A. an anionic surfactant component comprising an alcohol ethoxy sulfate having a C 8 -C 20 backbone that is ethoxylated with from about 1 to about 10 moles of ethylene oxide and is present in an amount of from about 10 to about 20 weight percent actives based on a total weight of said detergent composition;

B. water present in a total amount of from about 5 to about 10 weight percent based on a total weight of said detergent composition; and

C. a tertiary amine present in an amount of about 5 to about 7.5 weight percent actives based on a total weight of said detergent composition and having three arms wherein each arm comprises from about 1 to about 25 moles of ethylene oxide functionality, and

wherein said liquid detergent composition is a Newtonian fluid independent of shear rate and has a viscosity of less than about 1,000 cps at a shear rate of from about 0.41 to about 10 1/s over 5 minutes measured at 20° C. with a geometry cone of 40 mm, 1:59:49 degree:min:sec, and a truncation gap of 52 microns when diluted with additional water at about a 2:1 weight ratio of detergent composition:water.

2. The unit dose pack of claim 1 wherein each arm of said tertiary amine has about 4 to about 15 moles of ethylene oxide functionality.

3. The unit dose pack of claim 1 wherein said tertiary amine has the following chemical formula:

4. The unit dose pack of claim 3 wherein said alcohol ethoxy sulfate is sodium laureth sulfate ethoxylated with about 2 to about 4 moles of ethylene oxide.

5. The unit dose pack of claim 1 wherein said surfactant component further comprises an additional anionic surfactant and a non-ionic surfactant.

6. The unit dose pack of claim 5 wherein said alcohol ethoxy sulfate, said additional anionic surfactant, and said non-ionic surfactant are present in a weight ratio of about 0.2:1:0.2 to about 5:1:5.

7. The unit dose pack of claim 6 wherein said additional anionic surfactant is linear alkylbenzene sulfonate and said non-ionic surfactant is an ethoxylated alcohol.

8. The unit dose pack of claim 7 wherein said alcohol ethoxy sulfate is sodium laureth sulfate, and said sodium laureth sulfate, said linear alkylbenzene sulfonate, and said ethoxylated alcohol are present in a weight ratio of about 3:1:5.

9. The unit dose pack of claim 1 wherein said surfactant component further comprises a non-ionic surfactant which is an ethoxylated alcohol comprising a C 8 -C 20 backbone that is ethoxylated with from about 2 to about 12 moles of ethylene oxide.

10. A detergent composition exhibiting approximate Newtonian behavior during hydration and comprising:

A. a surfactant component comprising an alcohol ethoxy sulfate having a C 8 -C 20 backbone that is ethoxylated with from about 1 to about 10 moles of ethylene oxide and is present in an amount of from about 5 to about 30 weight percent actives based on a total weight of said detergent composition, wherein said alcohol ethoxy sulfate is sodium laureth sulfate;

B. water present in a total amount of from about 5 to about 10 weight percent based on a total weight of said detergent composition; and

C. a tertiary amine present in an amount of about 2.5 to 5 weight percent actives based on a total weight of said detergent composition and having three arms wherein each arm comprises from about 1 to about 25 moles of ethylene oxide functionality, and

wherein said detergent composition has a viscosity of less than about 2,000 cps and is measured using an AR2000-EX Rheometer at a shear rate of 1.08 1/s over 5 minutes at 20° C. with a geometry cone of 40 mm, 1:59:49 degree:min:sec, and a truncation gap of 52 microns when diluted with additional water at about a 2:1 weight ratio of detergent composition:water.

11. A method for modifying rheology of a detergent composition to be a Newtonian fluid independent of shear, said method comprising the steps of:

providing a detergent composition comprising;

a surfactant component comprising an alcohol ethoxy sulfate having a C 8 -C 20 backbone that is ethoxylated with from about 1 to about 10 moles of ethylene oxide and is present in an amount of from about 10 to about 20 weight percent actives based on a total weight of the detergent composition;

water present in a total amount of from about 5 to about 10 weight percent based on a total weight of the detergent composition; and

a tertiary amine present in an amount of about 5 to about 7.5 weight percent actives based on a total weight of said detergent composition and having three arms wherein each arm comprises from about 1 to about 25 moles of ethylene oxide functionality, and

diluting the detergent composition with additional water such that the detergent composition has a viscosity of less than about 1,000 cps at a shear rate of from about 0.41 to about 10 1/s over 5 minutes measured at 20° C. with a geometry cone of 40 mm, 1:59:49 degree:min:sec, and a truncation gap of 52 microns when diluted with additional water at about a 2:1 weight ratio of detergent composition:water.

12. The unit dose pack of claim 1 , wherein said liquid detergent composition has a viscosity of about 405 cps or less at a shear rate of from about 0.41 to about 10 1/s over 5 minutes measured at 20° C. with a geometry cone of 40 mm, 1:59:49 degree:min:sec, and a truncation gap of 52 microns when diluted with additional water at about a 2:1 weight ratio of detergent composition:water.

13. The detergent composition of claim 10 having a viscosity of about 1,122 cps or less measured using an AR2000-EX Rheometer at a shear rate of 1.08 1/s over 5 minutes at 20° C. with a geometry cone of 40 mm, 1:59:49 degree:min:sec, and a truncation gap of 52 microns when diluted with additional water at about a 2:1 weight ratio of detergent composition:water.