Aerosol foam dispenser

An aerosol foam dispenser comprising:

• a. a container configured to contain a composition and a compressed gas propellant, wherein the pressure in the container is from about 170 kPa to about 1150 kPa at 21° C.;
• b. a valve assembly in fluid communication with the container;
• c. an actuator assembly comprising:
• i. a supply channel in fluid communication with the valve assembly;
• ii. a nozzle in fluid communication with the supply channel and configured to atomize the composition, the nozzle comprising:
• 1. a substantially cup-shaped nozzle insert having an outlet orifice;
• and
• 2. a nozzle body for receiving and retaining the nozzle insert, the nozzle body in fluid communication with the supply channel for receiving a composition to be atomized and comprising an insert post having an end surface;
• and
• wherein the nozzle comprises a swirl chamber in fluid communication with a plurality of generally radial vanes and the outlet orifice disposed generally concentric with the swirl chamber and in fluid communication therewith, wherein the plurality of radial vanes is in fluid communication with the supply channel;
• iii. an expansion chamber comprising a side wall, a first end region, and a laterally opposing second end region, wherein the first end region is in fluid communication with the outlet orifice, and wherein the side wall comprises an air vent extending therethrough;
• iv. a porous barrier extending in a direction substantially parallel to an outer end surface of the nozzle, wherein the porous barrier is positioned adjacent to the second end region of the expansion chamber;
• and
• v. an actuator in operative communication with the valve assembly;
• wherein a flow rate of the composition discharged from the actuator assembly as measured without the porous barrier present is in the range of about 2 g/s to about 10 g/s;
• and
• wherein a flow rate of the composition discharged from the actuator assembly as measured with the porous barrier present is in the range of about 1 g/s to about 7 g/s.

An aerosol foam dispenser comprising:

• a. a container;
• b. a valve assembly in fluid communication with the container;
• and
• c. an actuator assembly comprising:
• i. a supply channel in fluid communication with the valve assembly;
• ii. a nozzle in fluid communication with the supply channel and configured to atomize the composition, the nozzle comprising:
• 1. a substantially cup-shaped nozzle insert having an outlet orifice;
• and
• 2. a nozzle body for receiving and retaining the nozzle insert, the nozzle body in fluid communication with the supply channel for receiving a composition to be atomized and comprising an insert post having an end surface;
• wherein the nozzle comprises a swirl chamber in fluid communication with a plurality of generally radial vanes and an outlet orifice disposed generally concentric with the swirl chamber and in fluid communication therewith, wherein the plurality of radial vanes is in fluid communication with the supply channel;
• iii. an expansion chamber comprising a side wall, a first end region and a laterally opposing second end region, wherein the first end region is in fluid communication with the outlet orifice, wherein the side wall comprises an air vent extending therethrough;
• iv. a screen extending in a direction substantially parallel to an outer end surface of the nozzle, wherein the screen is positioned adjacent to the second end region of the expansion chamber, the screen having a mesh size of from about 20 to about 40;
• and
• v. an actuator in operative communication with the valve assembly;
• wherein the expansion chamber has a chamber length from about 5 mm to about 25 mm.