Continuous spray dispenser for highly corrosive and other low compatibility products

A spray dispensing device comprising:

• (a) a container including (i) a first chamber, wherein a constant pressure within the first chamber is maintained in the range from about 20 psi to 70 psi and (ii) a second chamber configured as a pressure control device;
• (b) a bladder contained within the first chamber and housing a fluid composition;
• (c) an actuator in fluid communication with the first chamber configured to dispense the fluid composition from the bladder upon actuation thereof;
• (d) a pressurized composition contained within the second chamber, the pressurized composition being selected from the group consisting of:
• air, nitrogen, carbon dioxide, argon and combinations thereof;
• and
• (f) an automatic outlet valve which is configured for fluid communication between the second chamber and the first chamber;
• wherein the pressurized composition flows from the second chamber to the first chamber through the automatic outlet valve to maintain the constant pressure at least until the bladder is substantially emptied of the fluid composition;
• wherein the pressurized composition does not contact the fluid composition and the pressurized composition remains within the container and is not dispensed into the atmosphere;
• wherein the bladder is formed of a first compatible material to house the fluid composition and the actuator is formed of a second compatible material to dispense the fluid composition.

A spray dispensing device comprising:

• (a) a container having non-parallel sidewalls, wherein a transverse cross-section of the container varies along a longitudinal axis of the container, wherein the container defines:
• (i) a first chamber, and
• (ii) a second chamber to contain a pressurized composition selected from the group consisting of:
• nitrogen, carbon dioxide, liquid nitrogen, liquid carbon dioxide, and combinations thereof;
• (b) a bladder that is flexible and contained within the first chamber, wherein the bladder is formed of a first compatible material to house a bleach composition;
• (c) an actuator formed of a second compatible material and in fluid communication with the bladder configured to dispense the bleach composition as an aerosol from the bladder upon actuation of the actuator;
• and
• (d) an automatic outlet valve which communicates between the second chamber and the first chamber;
• wherein the pressurized composition does not contact the bleach composition but as the pressurized composition flows into the first chamber a constant pressure is applied to the bladder to drive dispensing of the bleach composition upon actuation of the actuator;
• wherein the constant pressure within the first chamber is configured to be maintained in the range of about 20 psi to about 70 psi by the pressurized composition flowing from the second chamber through the outlet valve into the first chamber;
• wherein the second chamber is maintained at a pressure greater than at least about 20 psi until the bladder is substantially empty of the bleach composition due to the aerosol dispensing of the bleach composition.