A surface coating method includes the steps of preparing a solution containing a solvent and a material or its precursor, intended to cover a surface to be coated, which is non-volatile, film-forming and soluble or can be in suspension or dispersed in a solvent; and generating an aerosol of the solution. The method further includes generating an aerosol flow from a first end of a tube towards a second end of the tube, wherein the second end pre-determined cross-section (Se) and provided with a spray nozzle having an outlet with a cross-section (S) smaller than the cross-section (Se) of the second end of the tube, such that the ratio R1=F/S is greater than 4 metres per second. The method also includes the steps of directing the outlet of the nozzle towards the surface to be coated and spraying the aerosol onto the surface to be coated.

A dispenser head for an aerosol can and a method of assembly of the same, the dispenser head comprising a chassis attached to the associated aerosol can and a spray-through cap attached thereto, the chassis comprising a platform capable of axial movement and a flexible spray channel centrally located thereon.

A sprayer apparatus for dispensing fluid from an aerosol spray can includes a tube which is couplable to a valve stem of the aerosol spray can. A spray can valve actuator is coupled to the tube and couplable to the spray can. The spray can valve is operable to depress the valve stem to fluidly couple a chamber of the aerosol spray can and the tube. A dispenser gun is attached to the tube and is operable to release the fluid supplied through the tube.

A sprayer apparatus for dispensing fluid from an aerosol spray can includes a tube which is couplable to a valve stem of the aerosol spray can. A spray can valve actuator is coupled to the tube and couplable to the spray can. The spray can valve is operable to depress the valve stem to fluidly couple a chamber of the aerosol spray can and the tube. A dispenser gun is attached to the tube and is operable to release the fluid supplied through the tube.

A discharge apparatus for discharging contents in an aerosol container, comprising, a first flow channel connected to an aerosol container; a second flow channel connected to the first flow channel; a support configured to support at least a part of the second flow channel; and a change unit configured to change a shape of the second flow channel, wherein the support changes a support position of the second flow channel in response to a change in a shape of the second flow channel, is provided. In addition, an unmanned aerial vehicle on which the discharge apparatus is mounted is provided.

A discharge apparatus for discharging contents in an aerosol container, comprising, a first flow channel connected to an aerosol container; a second flow channel connected to the first flow channel; a support configured to support at least a part of the second flow channel; and a change unit configured to change a shape of the second flow channel, wherein the support changes a support position of the second flow channel in response to a change in a shape of the second flow channel, is provided. In addition, an unmanned aerial vehicle on which the discharge apparatus is mounted is provided.

Described herein are one-component spray foam compositions having a low post post-expansion rate. Also described herein are methods of making and using one-component spray foam compositions having a low post-expansion rate. Also described herein are dispensers for dispensing the one-component spray foam compositions having a low post-expansion rate. Compositions and methods in accordance with the present disclosure are useful in a wide variety of applications, and are particularly useful in construction applications.

Described herein are one-component spray foam compositions having a low post post-expansion rate. Also described herein are methods of making and using one-component spray foam compositions having a low post-expansion rate. Also described herein are dispensers for dispensing the one-component spray foam compositions having a low post-expansion rate. Compositions and methods in accordance with the present disclosure are useful in a wide variety of applications, and are particularly useful in construction applications.

Provided is a discharge apparatus to which an aerosol container can be detachably mounted, the discharge apparatus including: a pressing unit configured to press a stem for opening and closing a valve of the aerosol container; and a buffer unit configured to buffer excess force, which is an amount of force by which force with which the pressing unit presses the stem has exceeded force to open the valve. The buffer unit may be configured to buffer the excess force exerted on the pressing unit by moving the pressing unit according to the excess force. The buffer unit may be configured to buffer the excess force exerted on the aerosol container by moving the aerosol container according to the excess force.

Provided is a discharge apparatus to which an aerosol container can be detachably mounted, the discharge apparatus including: a pressing unit configured to press a stem for opening and closing a valve of the aerosol container; and a buffer unit configured to buffer excess force, which is an amount of force by which force with which the pressing unit presses the stem has exceeded force to open the valve. The buffer unit may be configured to buffer the excess force exerted on the pressing unit by moving the pressing unit according to the excess force. The buffer unit may be configured to buffer the excess force exerted on the aerosol container by moving the aerosol container according to the excess force.