Method of making a clear personal care comprising microcapsules

Patent metadata

Field	Value
Publication number	US-11896689-B2
Application number	US-202016907711-A
Country	US
Kind code	B2
Filing date	Jun 22, 2020
Priority date	Jun 28, 2019
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

A method of making a personal care composition that involves using a mixer to combine a personal care composition chassis with microcapsules. The mixer has a housing, a first fluid inlet, a second inlet, a fluid outlet and a rotor connected to the housing. The rotor has blades positioned within the housing to define cells between neighboring blades and the housing. The personal care composition chassis, which includes surfactants and water, is advanced along a flow path from the first fluid inlet toward the fluid outlet, while the microcapsules are transferred from the second inlet to the flow path by rotating the rotor. Air in the microcapsule composition is directed from inside the cells toward the second inlet, and the microcapsule composition is combined with the personal care composition chassis to form the personal care composition. The personal care composition is advanced from the outlet.

First claim

What is claimed is:

1. A method of making a personal care composition, the method comprising steps of:
providing a mixer comprising a housing comprising a first fluid inlet, a second inlet, a fluid outlet, and a the rotor rotatably connected with the housing, wherein the rotor comprises blades positioned within the housing to define cells between neighboring blades and the housing;
preparing a personal care chassis base comprising surfactants and water;
preparing a microcapsule composition comprising microcapsules and air;
advancing the personal care chassis base along a flow path from the first fluid inlet toward the fluid outlet;
transferring the microcapsule composition from the second inlet to the flow path by rotating the rotor;
directing the air in the microcapsule composition from inside the cells toward the second inlet;
combining the microcapsule composition with the personal care chassis base to form the personal care composition; and
advancing the personal care composition from the fluid outlet.

2. The method of claim 1 , wherein the step of directing the air further comprises forcing the air through apertures in the blades.

3. The method of claim 2 , wherein the apertures can be straight through the rotor blades in a perpendicular direction to the long axis of the rotor blades.

4. The method of claim 2 , wherein the apertures can be angled so as to direct a flow of air and liquid to one side of the housing.

5. The method of claim 2 , wherein the apertures have a shape selected from the group consisting of round, rectangular, oval and combinations thereof.

6. The method of claim 1 , wherein the step of advancing the personal care composition is done at a rate of about 50 L/min to about 150 L/min.

7. The method of claim 1 , wherein the personal care composition is conveyed to a filling line.

8. The method of claim 1 , wherein the personal care composition has a L* value of 0 to about 40, according to the L* Testing for transmittance impact of air bubbles method.

9. The method of claim 1 , wherein the microcapsule shape is selected from the group consisting of round, bead like, lamellar or strip-like, sheet, spherical, semi-spherical, hemi-spherical, flat bottomed tear drop, ellipsoidal, ribbon like and any combination thereof.

10. The method of claim 1 , wherein the personal care composition is further conveyed to a surge tank and then conveyed to a filling line.

11. The method of claim 1 , wherein the personal care composition is conveyed through a filling nozzle.

12. The method of claim 11 wherein the filling nozzle comprises a fluid shutoff valve assembly, the fluid shutoff valve assembly having a fluid flow path defining a direction of fluid flow, the fluid shutoff valve assembly comprising:
a fluid inlet orifice in fluid communication with a source of a fluid, the fluid inlet orifice allowing the fluid to flow in the direction of fluid flow from the source of the fluid into the fluid flow path of the fluid shutoff valve assembly;
a fluid outlet orifice in fluid communication with the fluid flow path of the fluid shutoff valve assembly and through which the fluid may flow out of the fluid shutoff valve assembly; and
a fluid shutoff valve in fluid communication with the fluid inlet orifice and the fluid outlet orifice, the fluid shutoff valve having a fluid blocking portion and a fluid flow-through portion, the fluid shutoff valve being moveable from a filling position wherein the fluid flow-through portion is aligned with the fluid flow path of the fluid shutoff valve assembly to a closed position wherein the fluid blocking portion is aligned with the fluid flow path of the fluid shutoff valve assembly, wherein the fluid shutoff valve is oriented such that it moves in a direction that is generally perpendicular to the direction of fluid flow at a location where the fluid shutoff valve intercepts the fluid flow path of the fluid shutoff valve assembly,
wherein the fluid flow-through portion has an upper portion, a middle portion, and a lower portion.

13. The method of claim 12 , wherein the fluid flow-through portion has a diameter at the upper portion which is larger than the diameter of the lower portion.

14. The method of claim 12 , wherein the fluid flow-through portion has a diameter at the upper portion that is the same as the diameter at the lower portion.

15. The method of claim 12 , wherein the upper portion of the fluid flow-through portion has the same diameter as the fluid inlet orifice.

16. The method of claim 12 , wherein the lower portion of the fluid flow-through portion has the same diameter as the fluid outlet orifice.

17. The method of claim 1 , wherein the personal care composition is conveyed into bottles.

18. The method of claim 1 , wherein the method does not use storage tanks.

19. The method of claim 1 , wherein the personal care composition comprises about 5 to about 35 wt % of a detersive surfactant selected from the group consisting of anionic surfactants, amphoteric surfactants, nonionic surfactants, and mixtures thereof.

20. The method of claim 1 , wherein the personal care composition comprises about 0.05 wt % to about 3 wt % of a cationic deposition polymer.

21. The method of claim 1 , wherein the personal care composition comprises about 0.05 wt % to about 10 wt % of microcapsules.

22. The method of claim 1 , wherein the microcapsules are a gellan film comprising about 30 to about 40 parts of sodium alginate, about 40 to about 50 parts gellan gum, about 5 to about 10 parts polyvinyl alcohol, and about 5 to about 10 parts hydroxyl methyl cellulose sodium.

23. The method of claim 1 , wherein the microcapsules comprise a material selected from the group consisting of menthol, peppermint oil, menthyl lactate, jojoba oil, Vitamin E, dyes, discrete panicles comprising anhydrous particles and an aqueous phase, perfumes and combinations thereof.

24. The method of claim 1 , wherein the step of directing air further comprises forcing the air through gaps between the blades and the housing.

25. The method of claim 1 , wherein the step of advancing the personal care composition is done a rate of about 1.5 L/min to about 200 L/min.

26. A method of making a personal care composition, the method comprising steps of:
providing a mixer comprising a housing comprising a first fluid inlet, a second inlet, a fluid outlet, and a rotor rotatably connected with the housing, wherein the rotor comprises blades positioned within the housing to define cells between neighboring blades and the housing;
preparing a personal care chassis base comprising surfactants and water;
preparing a microcapsule composition comprising microcapsules and an aqueous carrier;
advancing the personal care chassis base along a flow path from the first fluid inlet toward the fluid outlet;
transferring the microcapsule composition from the second inlet to the flow path by rotating the rotor; wherein air enters the microcapsule composition in the flow path;
directing the air in the microcapsule composition from inside the cells toward the second inlet;
combining the microcapsule composition with the personal care chassis base to form the personal care composition; and
advancing the personal care composition from the fluid outlet.

Assignees

• Procter & Gamble

Inventors

• Dunlop David Scott
• Goudy Eric Shawn

Classifications

• A61K8/11 Primary

  Encapsulated compositions · CPC title

• A61K8/342

  Alcohols having more than seven atoms in an unbroken chain · CPC title

• A61K8/416

  Quaternary ammonium compounds (A61K8/35 takes precedence) · CPC title

• A61K8/463

  containing sulfuric acid derivatives, e.g. sodium lauryl sulfate · CPC title

• A61K8/602

  Glycosides, e.g. rutin · CPC title