Dispensers for dispensing microcapsules

Patent metadata

Field	Value
Publication number	US-9839931-B2
Application number	US-201514848921-A
Country	US
Kind code	B2
Filing date	Sep 9, 2015
Priority date	Sep 9, 2015
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

A dispenser for applying at least two compositions, the dispenser including at least two reservoirs for storing the at least two compositions, at least two pumps for pumping the at least two compositions, a premix chamber containing a mixing element for mixing the two compositions, at least two channels for delivering the compositions from the reservoirs to the premix chamber, an exit orifice, optionally a swirl chamber, and an actuator.

First claim

What is claimed is:

1. A dispenser comprising:
a first reservoir, the first reservoir comprising a first pump and a first composition;
a second reservoir, the second reservoir comprising a second pump and a second composition;
a first channel having a proximal end and a distal end;
a second channel having a proximal end and a distal end;
an exit orifice;
a premix chamber;
a swirl chamber; and
an actuator;
wherein the proximal end of the first channel is in liquid communication with the first pump and the distal end of the first channel is in liquid communication with the premix chamber;
wherein the proximal end of the second channel is in liquid communication with the second pump and the distal end of the second channel is in liquid communication with the premix chamber;
wherein the premix chamber is located between a first exit tube and a second exit tube and is in liquid communication with the swirl chamber;
wherein the swirl chamber is located between the exit orifice and the first and said second exit tubes;
wherein said first pump and second pump are operatively associated with the actuator;
wherein said first composition comprises microcapsules and a carrier comprising water and said second composition comprises a volatile solvent;
wherein said premix chamber comprises a mixing element.

2. The dispenser of claim 1 , wherein the first composition and the second composition mix prior to exiting via the exit orifice but do not mix prior to entering the premix chamber.

3. The dispenser of claim 1 , wherein the dispenser dispenses a dispensing volume and the premix chamber comprises a mixing volume; wherein the dispensing volume is greater than the mixing volume.

4. The dispenser of claim 3 , wherein the mixing volume is from about 1% to 75% by weight, of the dispensing volume.

5. The dispenser of claim 1 , wherein first reservoir and the second reservoir have different volumes.

6. The dispenser of claim 4 , wherein the dispensing volume is from about 30 microliters to about 300 microliters.

7. The dispenser of claim 1 , wherein the first pump and the second pump dispense different volumes.

8. The dispenser of claim 1 , wherein the dispenser further comprises a first dip tube and a second dip tube; wherein the first dip tube is in communication with the first pump and the second dip tube is in communication with the second pump.

9. The dispenser of claim 1 , wherein the first composition and second composition are dispensed as a mixture from the exit orifice at a weight ratio of from 10:1 to 1:10.

10. The dispenser of claim 1 , wherein the swirl chamber further comprises one or more flow passages.

11. The dispenser of claim 10 , wherein the swirl chamber further comprises a swirl zone; wherein said swirl zone is in communication with the exit orifice and at least one flow passage.

12. The dispenser of claim 1 , wherein the microcapsules comprise a core material and a shell encapsulating the core material; wherein the core material comprises a fragrance.

13. The dispenser of claim 12 , wherein the wherein the shell comprises a material selected from the group consisting of polyacrylates, polyethylenes, polyamides, polystyrenes, polyisoprenes, polycarbonates, polyesters, polyureas, polyurethanes, polyolefins, polysaccharides, epoxy resins, vinyl polymers, and combinations thereof.

14. The dispenser of claim 1 , wherein the microcapsules have a fracture strength of from about 0.2 MPa to about 20 MPa.

15. The dispenser of claim 1 , wherein the first composition is substantially free of a material selected from the group consisting of a propellant, ethanol, a detersive surfactant, and combinations thereof.

16. The dispenser of claim 1 , wherein the second composition is substantially free of a material selected from the group consisting of a propellant, microcapsules, a detersive surfactant, and combinations thereof.

17. The dispenser of claim 1 , wherein the microcapsules have a median volume-weighted particle size of from about 2 microns to about 80 microns.

18. The dispenser of claim 1 , wherein the volatile solvent is ethanol.

19. The dispenser of claim 1 where the distal end of the first channel is in liquid communication with the premix chamber along a first direction and the distal end of the second channel is in liquid communication with the premix chamber along a second direction, wherein the first and second directions are opposing in a straight line; are mutually inclined at angle less than 180°; or are parallel and offset one from the other.

20. The dispenser of claim 1 where the premix chamber has a cylindrical axis and the distal end of the first channel and the distal end of the second channel are in liquid communication with the premix chamber at respective locations spaced along said cylindrical axis.

21. A method of providing a longer lasting fragrance, the method comprising spraying the first and second composition using the dispenser of claim 1 .

Assignees

• Procter & Gamble

Inventors

• Burrowes Lee
• Connolly William John Cleveland
• Masters Andrew Graham
• Richardson James Samuel

Classifications

• B05B11/1084 Primary

  each liquid or other fluent material being pumped by a separate pump · CPC title

• B05B11/1056

  comprising rotatable or articulated levers (B05B11/1053 takes precedence; lever actuated piston pumps B05B11/1009; lever actuated pumps with deformable chamber B05B11/1029) · CPC title

• B05B11/1074

  located outside pump chambers · CPC title

• B05B1/3436 Primary

  the interface being a plane perpendicular to the outlet axis · CPC title

• B01F5/0062

  Operations & Transport · mapped topic