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United States Patent 6,200,554 7,589,051

 

 

Applicant: Procter and Gamble

 

Date: March 13, 2001

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Conditioning shampoo compositions having improved silicone deposition

 

Abstract or Summary of the Invention

 

Disclosed are conditioning shampoo compositions which provide improved hair or skin conditioning performance. These compositions comprise a detersive surfactant, select ethoxylated fatty alcohols having a fatty alcohol moiety containing from about 6 to about 30 carbon atoms and an ethoxylate chain containing from about 5 to about 150 mole of ethoxylation, a nonvolatile conditioning agent, preferably a nonvolatile silicone conditioning agent, having an average particle size of from about 5 um to about 2000 um, and water. The select ethoxylated fatty alcohols provide improved hair or skin conditioning by improving silicone deposition of large particle conditioning agents onto the hair or skin.

 


 

Composition:

 

Comparative Examples of Silicone Deposition with Ceteth-10 as the ethoxylated fatty alcohol.

 

Item No

Ingredient

 Formulation I

 Formulation II

 

 

% By Weight

% By Weight

1

Ammonium Laureth-3 Sulfate

                 10.00

                    10.00

2

Ammonium Lauryl Sulfate

                   6.00

                      6.00

3

Dimethicone Emulsion

                   1.50

                      1.50

4

Ceteth-10

                      -  

                      3.00

5

Cocamide MEA

                   0.90

                      0.90

6

Ethylene Glycol Distearate

                   1.50

                      1.50

7

Monosodium Phosphate

                   0.10

                      0.10

8

Disodium Phosphate

                   0.20

                      0.20

9

Fragrance

                   0.50

                      0.50

10

DMDM Hydantoin

                   0.20

                      0.20

11

Color Solution

                   0.64

                      0.64

12

Perfume

                   0.60

                      0.60

13

Sodium Benzoate

                   0.25

                      0.25

14

Sodium Chloride

                   1.00

                      1.00

15

Water and minors

 q.s. to 100% 

 q.s. to 100% 

 

Silicone Deposited:

 541 ppm 

 1020 ppm (control) (89% increase) 

 

 

 

 

 

Preparation

 

For the shampoo compositions illustrated in Examples I and II, about one-third of the total items 1 and 2 and water, item 15, is added to a mixing vessel and heated to about 74o C. with slow agitation to form a surfactant solution, cocamide MEA, item 5 and other minor ingredients, as applicable, are added to the vessel and allowed to disperse. Ethylene glycol distearate (EGDS), item 6, is then added to the mixing vessel, and melted. After the EGDS is well dispersed (usually after about 5 to 20 minutes) optional preservative, items 10 and 13, is added and mixed into the surfactant solution. This mixture is passed through a heat exchanger where it is cooled to about 35o C. and collected in a finishing tank. As a result of this cooling step, the ethylene glycol distearate crystallizes to form a crystalline network in the product. The remainder of the ammonium laureth sulfate and lauryl sulfate are then added to a separate jacketed mix tank and heated to about 74o C. with slow agitation to form a surfactant solution. The ethoxylated fatty alcohol, item 4, is then added and allowed to dissolve. The solution is then allowed to cool to below 30o C. This solution, together with the rest of the ingredients including the silicone emulsion, item 3, are added to the finishing tank with ample agitation to insure a homogeneous mixture. Once all ingredients have been added, sodium chloride, item 14, can be added to the mixture to thicken to achieve a desired product viscosity. Preferred viscosities range from about 3500 to about 9000 centistokes at 25o C. (as measured by a Wells-Brookfield cone and plate viscometer at 2/s at 3 minutes).

 

The monosodium and disodium phosphate buffer pair can be replaced with citric acid to achieve a pH 6 to 6.5.

 

 

 

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