Air scenting compositions for spray application on air scenting devices

Abstract

Aqueous compositions as well as processes and devices are disclosed for spray application on an air scenting device to provide long lasting freshening or scenting of air flowing through the device with minimal blockage of air flow through the device. The compositions contain a polymeric emulsion, a surfactant and a fragrance material and also may optionally include a rheological agent and/or an anti-microbial agent.

1 - 37 . (canceled)  
   
   
       38 . An aqueous scenting composition comprising: 
 (a) an air permeable barrier film forming latex polymeric emulsion in an amount of at least about 25% by weight of the composition;    (b) a surfactant; and    (c) a fragrance material;    the composition being formulated and applied as a spray on an air scenting device in an HVAC system forming an air permeable barrier film on the air scenting device which slows the rate of water evaporation and causes long lasting freshening or scenting of air flowing through the device with minimal blockage of air flow through the scenting device.    
   
   
       39 . The aqueous scenting composition of  claim 38  wherein the air permeable barrier film forming polymeric latex emulsion is a water-borne latex polymer.  
   
   
       40 . The aqueous scenting composition of  claim 38  wherein the air permeable barrier film forming latex polymeric emulsion is selected from the group consisting of styrene butadiene copolymers, acrylic polymers, acrylic urethane hybrid copolymers, styrene acrylic copolymers and mixtures thereof.  
   
   
       41 . The aqueous scenting composition of  claim 38  wherein the surfactant is selected from the group consisting of non-ionic and anionic surfactants and mixtures thereof.  
   
   
       42 . The aqueous scenting composition of  claim 41  wherein the surfactant is a solvent free anionic/nonionic grind aid surfactant.  
   
   
       43 . The aqueous scenting composition of  claim 41  wherein the surfactant is selected from the group consisting of low foaming, non-ionic surfactants compatible with anionic particles, non-ionic, dimethyl octynediol surfactants, ethoxylated alkyl phenols, nonionic, octoxynol 9 surfactants, non-ionic, polysorbate 20 and mixtures thereof.  
   
   
       44 . The aqueous scenting composition of  claim 38  including a rheological agent.  
   
   
       45 . The aqueous scenting composition of  claim 44  wherein the rheological agent is selected from the group consisting of gums, clays, cellulosics, dextrins, algins, polymeric thickeners and mixtures thereof.  
   
   
       46 . The aqueous scenting composition of  claim 38  including an anti-microbial agent.  
   
   
       47 . An aqueous scenting spray composition applied on an air scenting device in an HVAC system to provide long lasting freshening or scenting of air flowing through the device with minimal blockage of air flow through the device comprising: 
 (a) an air permeable barrier film forming latex polymeric emulsion selected from the group consisting of styrene butadiene copolymers, acrylic polymers, acrylic urethane hybrid copolymers, styrene acrylic copolymers and mixtures thereof in an amount of between about 10 and about 50% by weight of the composition;    (b) a surfactant selected from the group consisting of non-ionic and anionic surfactants and mixtures thereof; and    (c) a fragrance material;    the composition forming an air permeable barrier film on the air scenting device which slows the rate of water evaporation and causes long lasting freshening or scenting of air flowing through the device with minimal blockage of air flow.    
   
   
       48 . The aqueous scenting spray composition of  claim 47  including a rheological agent.  
   
   
       49 . The aqueous scenting spray composition of  claim 47  including an anti-microbial agent.  
   
   
       50 . An air scenting filter device for use in an HVAC system having a scenting composition sprayed thereon, the scenting composition comprising: 
 (a) an air permeable barrier film forming latex polymeric emulsion in an amount of at least about 25% by weight of the composition;    (b) a surfactant; and    (c) a fragrance material;    the composition forming an air permeable barrier film on the air scenting filter device which slows the rate of water evaporation and causes long lasting freshening or scenting of air flowing through the device with minimal blockage of air flow through the device.    
   
   
       51 . The air scenting filter device of  claim 50  wherein the air permeable barrier film forming polymeric latex emulsion is a water-borne latex polymer.  
   
   
       52 . The air scenting filter device of  claim 50  wherein the air permeable barrier film forming latex polymeric emulsion is selected from the group consisting of styrene butadiene copolymers, acrylic polymers, acrylic urethane hybrid copolymers, styrene acrylic copolymers and mixtures thereof.  
   
   
       53 . The air scenting filter device of  claim 50  wherein the surfactant is selected from the group consisting of non-ionic and anionic surfactants and mixtures thereof.  
   
   
       54 . The air scenting filter device aqueous of  claim 53  wherein the surfactant is a solvent free anionic/nonionic grind aid surfactant.  
   
   
       55 . The air scenting filter device of  claim 53  wherein the surfactant is selected from the group consisting of low foaming, non-ionic surfactants compatible with anionic particles, non-ionic, dimethyl octynediol surfactants, ethoxylated alkyl phenols, nonionic, octoxynol 9 surfactants, non-ionic, polysorbate 20 and mixtures thereof.  
   
   
       56 . The air scenting filter device of  claim 50  including a rheological agent.  
   
   
       57 . The air scenting filter device of  claim 56  wherein the rheological agent is selected from the group consisting of gums, clays, cellulosics, dextrins, algins, polymeric thickeners and mixtures thereof.  
   
   
       58 . The air scenting filter device of  claim 50  including an anti-microbial agent.