Substance dispensing system and method of making

Abstract

A substance dispensing system including a first pressure vessel defining a first interior space; a first substance positioned in the first interior space; a first portion of a first propellant positioned in the first interior space; and a first portion of a second propellant positioned in the first interior space. At least 90 percent by weight of the first propellant is at least one of carbon dioxide, nitrous oxide, and combinations thereof. At least 90 percent by weight of the second propellant is at least one of nitrogen, argon, helium, oxygen, and combinations thereof.

What is claimed is: 
     
         1 . A method of forming a substance dispensing system, the method comprising:
 positioning a first substance in a first interior space of a first pressure vessel defining the first interior space, the first substance being in a liquid phase;   positioning a first portion of a first propellant in the first interior space;   agitating the first pressure vessel containing the first substance and the first portion of the first propellant;   positioning a first portion of a second propellant in the first interior space;   wherein at least 90 percent by weight the first propellant is at least one of carbon dioxide, nitrous oxide, and combinations thereof; and   wherein at least 90 percent by weight the second propellant is at least one of nitrogen, argon, helium, oxygen, and combinations thereof, and   wherein a weight ratio of the second propellant to the first propellant in the first interior space is from 1:100 to 50:100 after the step of positioning the first portion of the second propellant in the first interior space.   
     
     
         2 . The method of  claim 1 , wherein the first propellant is at least one from the group consisting essentially of carbon dioxide, nitrous oxide, and combinations thereof, and wherein the second propellant is at least one from the group consisting essentially of nitrogen, argon, oxygen, helium, and combinations thereof. 
     
     
         3 . The method of  claim 1 , wherein the first propellant and the second propellant are free of hydrocarbons, hydrofluorocarbons, and chlorofluorocarbons. 
     
     
         4 . The method of  claim 1 , wherein a weight ratio of the second propellant to the first propellant in the first interior space is from 1:100 to 40:100. 
     
     
         5 . The method of  claim 1 , wherein a weight ratio of the second propellant to the first propellant in the first interior space is from 1:100 to 30:100. 
     
     
         6 . The method of  claim 1 , wherein the first substance includes at least one from the group of an isocyanate compound and an isocyanate reactive compound. 
     
     
         7 . A method of applying a liquid substance, the method comprising:
 dispensing a first liquid substance from a first interior space of a first pressure vessel defining the first interior space, the first substance being in a liquid phase, the first pressure vessel including a first portion of first propellant positioned in the first interior space, and a first portion of second propellant positioned in the first interior space and substantially in a gas phase of the first interior space;   dispensing a second liquid substance from a second interior space of a second pressure vessel defining the second interior space, the second substance being in a liquid phase, the second pressure vessel including a second portion of first propellant positioned in the second interior space, and a second portion of second propellant positioned in the second interior space and substantially in a gas phase of the second interior space;   wherein at least 90 percent by weight the first propellant is at least one of carbon dioxide, nitrous oxide, and combinations thereof; and   wherein at least 90 percent by weight the second propellant is at least one of nitrogen, argon, helium, oxygen, and combinations thereof, and   wherein a weight ratio of the second propellant to the first propellant in the first interior space is from greater than zero to 50:100,   wherein a weight ratio of the second propellant to the first propellant in the second interior space is from greater than zero to 40:100.   
     
     
         8 . The method of  claim 7 , wherein the first propellant is at least one from the group consisting essentially of carbon dioxide, nitrous oxide, and combinations thereof, and wherein the second propellant is at least one from the group consisting essentially of nitrogen, argon, oxygen, helium, and combinations thereof. 
     
     
         9 . The method of  claim 7 , wherein the first propellant and the second propellant are free of hydrocarbons, hydrofluorocarbons, and chlorofluorocarbons. 
     
     
         10 . The method of  claim 7 , further comprising bringing the first substance in contact with the second substance before the first substance and second substance are positioned on a substrate. 
     
     
         11 . The method of  claim 7 , wherein the first substance includes an isocyanate compound, and wherein the second substance includes an isocyanate reactive compound. 
     
     
         12 . The method of  claim 7 , wherein the first propellant positioned in the first interior space is the same propellant as the first propellant positioned in the second interior space, and the second propellant positioned in the first interior space is the same propellant as the second propellant positioned in the second interior space. 
     
     
         13 . A substance dispensing system comprising:
 a first substance positioned in a first interior space of a first pressure vessel defining the first interior space, the first substance being in a liquid phase, the first pressure vessel including a first portion of a first propellant positioned in the first interior space, and a first portion of a second propellant positioned in the first interior space and substantially in a gas phase of the first interior space;   a second substance positioned in a second interior space of a second pressure vessel defining the second interior space, the second substance being in a liquid phase, the second pressure vessel including a second portion of the first propellant positioned in the second interior space, and a second portion of the second propellant positioned in the second interior space and substantially in a gas phase of the second interior space;   wherein a weight ratio of the second propellant to the first propellant in the first interior space is from greater than zero: 100 to 50:100,   wherein a weight ratio of the second propellant to the first propellant in the second interior space is from greater than zero: 100 to 40:100,   wherein at least 90 percent by weight the first propellant is at least one of carbon dioxide, nitrous oxide, and combinations thereof; and   wherein at least 90 percent by weight the second propellant is at least one of nitrogen, argon, helium, oxygen, and combinations thereof, and   wherein the substance dispensing system is configured to dispense the first substance at a first volumetric flow rate and the second substate at a second volumetric flow rate that is no greater than 20 percent greater or less than the first flow rate.   
     
     
         14 . The substance dispensing system of  claim 13 , wherein the first propellant and the second propellant are substantially free of hydrocarbons, hydrofluorocarbons, and chlorofluorocarbons. 
     
     
         15 . The substance dispensing system of  claim 13 , wherein the first propellant is at least one from the group consisting essentially of carbon dioxide, nitrous oxide, and combinations thereof;
 and wherein the second propellant is at least one from the group consisting essentially of nitrogen, argon, oxygen, helium, and combinations thereof.   
     
     
         16 . The substance dispensing system of  claim 13 , wherein a weight ratio of the second propellant to the first propellant in the first interior space is from 1:100 to 40:100. 
     
     
         17 . The substance dispensing system of  claim 13 , wherein a weight ratio of the second propellant to the first propellant in the first interior space is from 1:100 to 30:100. 
     
     
         18 . The substance dispensing system of  claim 13 , wherein a weight ratio of the second propellant to the first propellant in second interior space is from 1:100 to 30:100. 
     
     
         19 . The substance dispensing system of  claim 13 , wherein a weight ratio of the second propellant to the first propellant in the second interior space is from 1:100 to 20:100. 
     
     
         20 . The substance dispensing system of  claim 13 , wherein a weight ratio of second propellant in the first interior space to the second propellant in the second interior space is from 80:100 to 150:100. 
     
     
         21 . The substance dispensing system of  claim 13 , wherein the first substance includes an isocyanate compound, and wherein the second substance includes an isocyanate reactive compound. 
     
     
         22 . The substance dispensing system of  claim 13 , wherein the substance dispensing system is configured to dispense the first substance at a first volumetric flow rate and the second substate at a second volumetric flow rate that is on average no greater than 20 percent greater or less than the first flow rate as the first and second substance are dispensed.