An assembly for dispensing polymeric foam and related dispensing methods
AssigneeSoudal
InventorsThomas DUIJSTERS, Bart Jozef J. VERVOORT, Joachim Marie Gerardus VERSTEGEN, Ivan BOEYKENS
Life of this patent
Estimating the term…
Abstract
The present invention relates to an assembly for dispensing polymeric foam, the assembly comprising a pressurized can with foamable aqueous polymer composition and one or more propellants, and a dispensing gun, wherein the viscosity of the foamable aqueous polymer composition and the flow resistance of the dispensing gun are optimized to achieve high dispensing yield. The invention further relates to methods of dispensing a polymeric foam using a dispensing gun and to associated uses of a dispensing gun.
Claims24
An assembly for dispensing a polymeric foam comprising
- a pressurized can comprising a foamable aqueous polymer composition and one or more propellants;
- and
- a dispensing gun comprising a basket for fluidly connecting the can to the dispensing gun, said basket comprising a flow channel connecting the can to the dispensing gun and a blocking means configured to be moveable between an open position wherein flow from the can to the dispensing gun is enabled and a closed position wherein flow from the can to the dispensing gun through the flow channel is blocked;
- wherein the foamable aqueous polymer composition has a dynamic viscosity determined according to the viscosity protocol at 20° C. and a 100 s-1 shear rate of less than 1.5 Pa·s,
- wherein the can has an internal relative pressure at 20° C. of at least 200 kPa, and
- wherein the blocking means comprised in the basket permits flow from the pressurized can until an internal relative pressure at 20° C. of less than 120 kPa.
A method of dispensing a polymeric foam comprising the steps of:
- (i) providing a pressurized can comprising a foamable aqueous polymer composition and one or more propellants, wherein the foamable aqueous polymer composition has a dynamic viscosity determined according to the viscosity protocol at 20° C. and a 100 s-1 shear rate of less than 1.5 Pa·s, and wherein the can has an internal relative pressure at 20° C. of at least 200 kPa;
- (ii) providing a dispensing gun comprising a basket for fluidly connecting the can to the dispensing gun, said basket comprising a flow channel connecting the can to the dispensing gun and a blocking means configured to be moveable between an open position wherein flow from the can to the dispensing gun is enabled and a closed position wherein flow from the can to the dispensing gun through the flow channel is blocked, wherein the blocking means comprised in the basket permits flow from the pressurized can until an internal relative pressure at 20° C. or less than 120 kPa;
- (iii) mounting the pressurized can on the dispensing gun by fluidly connecting the can to the dispensing gun;
- and
- (iv) dispensing the polymer composition from the can, thereby obtaining the polymeric foam.
(canceled)
Dependencies are inferred from the claim text.