Surface disinfectant with residual biocidal property

Abstract

A biofilm sealant is provided imparting a residual biocidal property. The biofilm sealant is used to treat a surface to impart a film having a capacity to quickly kill bacteria and other germs for at least 24 hours after deposit of the film on a treated surface. The disinfectant formulation biofilm sealant comprises a polymer binder, wherein the polymer binder is an oxazoline homopolymer or an extended or a modified polymer based on an oxazoline homopolymer, and a biocidal compound.

What is claimed is: 
     
         1 . A biocidal composition comprising:
 a polyoxazoline present in a range of 0.1% to 4% based on the weight of the disinfectant formulation, the polyoxazoline having a structure of   
       
         
           
           
               
               
           
         
       
       wherein: R 1  is methyl; R 2  is hydroxyl; R 3  is ethyl; and n=10 to 1,000,000, and
 a quaternary ammonium compound or a mixture of quaternary ammonium compounds present in a range of 0.1% to 4% based on the weight of the disinfectant formulation, 
 the quaternary ammonium compound (QAC) having the molecular structure of: 
 
       
         
           
           
               
               
           
         
         wherein
 R 1  is methyl; 
 R 2  is alkyl C8-10; methyl-benzyl; or ethyl-benzyl; 
 R 3  is methyl; 
 R 4  is alkyl C8-18; 
 and 
 X −  is chloride, or carbonate/bicarbonate; 
 
         wherein the biocidal composition is a biofilm sealant. 
       
     
     
         2 . The biocidal composition according to  claim 1 , wherein the polyoxazoline is prepared with a monomer of ethyloxazoline. 
     
     
         3 . The biocidal composition according to  claim 2 , wherein ethyloxazoline is copolymerized with a heterocyclic monomer. 
     
     
         4 . The biocidal composition according to  claim 1 , wherein the disinfectant formulation is in a form of a liquid. 
     
     
         5 . The biocidal composition according to  claim 1 , wherein the quaternary ammonium compound is present in a composition comprising: N-alkyl dimethyl benzyl ammonium chloride, N-octyl decyl dimethyl ammonium chloride, di-n-decyl dimethyl ammonium chloride, and di-n-octyl dimethyl ammonium chloride. 
     
     
         6 . The biocidal composition according to  claim 5 , wherein the biocidal composition comprises: 40 weight % of N-alkyl dimethyl benzyl ammonium chloride, 30 weight % of N-octyl decyl dimethyl ammonium chloride, 15 weight % of di-n-decyl dimethyl ammonium chloride, and 15 weight % of di-n-octyl dimethyl ammonium chloride, wherein the percentage is a weight percentage of individual quaternary ammonium compounds based on the total weight of the quaternary ammonium compounds within the composition. 
     
     
         7 . The biocidal composition according to  claim 1 , further comprising a carrier comprised of a solvent or a mixture of solvents. 
     
     
         8 . The biocidal composition according to  claim 7 , wherein the solvent or mixture of solvents comprise water, a low molecular weight alcohol, alkylene glycol ether, a terpene or terpene derivative, and a combination thereof. 
     
     
         9 . The biocidal composition according to  claim 8 , wherein the alcohol is present in an amount of at least 10%. 
     
     
         10 . The biocidal composition according to  claim 1 , further comprising a surfactant or a wetting agent. 
     
     
         11 . The biocidal composition according to  claim 10 , wherein the surfactant is present in a range of 0.01% to 2%. 
     
     
         12 . A biocidal composition comprising:
 a polyoxazoline present in a range of 0.1% to 4% based on the weight of the disinfectant formulation, the polyoxazoline having a structure of   
       
         
           
           
               
               
           
         
       
       wherein: R 1  is methyl; R 2  is hydroxyl; R 3  is ethyl; and n=10 to 1,000,000,
 a quaternary ammonium compound or a mixture of quaternary ammonium compounds present in a range of 0.1% to 4% based on the weight of the disinfectant formulation, 
 and 
 wherein the composition is a biofilm sealant having a residual biocidal property and 
 the quaternary ammonium compound (QAC) has a molecular structure of: 
 
       
         
           
           
               
               
           
         
         wherein 
         R 1  is methyl; 
         R 2  is alkyl C8-10; methyl-benzyl; or ethyl-benzyl; 
         R 3  is methyl; 
         R 4  is alkyl C8-18; 
         and 
         X −  is chloride, or carbonate/bicarbonate. 
       
     
     
         13 . The biocidal composition according to  claim 12 , wherein the polyoxazoline is prepared with a monomer of ethyloxazoline. 
     
     
         14 . The biocidal composition according to  claim 13 , wherein ethyloxazoline is copolymerized with a heterocyclic monomer. 
     
     
         15 . The biocidal composition according to  claim 12 , wherein the disinfectant formulation is in a form of a liquid. 
     
     
         16 . The biocidal composition according to  claim 12 , wherein the quaternary ammonium compound is present in a composition comprising: N-alkyl dimethyl benzyl ammonium chloride, N-octyl decyl dimethyl ammonium chloride, di-n-decyl dimethyl ammonium chloride, and di-n-octyl dimethyl ammonium chloride. 
     
     
         17 . The biocidal composition according to  claim 16 , wherein the biocidal composition comprises: 40 weight % of N-alkyl dimethyl benzyl ammonium chloride, 30 weight % of N-octyl decyl dimethyl ammonium chloride, 15 weight % of di-n-decyl dimethyl ammonium chloride, and 15 weight % of di-n-octyl dimethyl ammonium chloride, wherein the percentage is a weight percentage of individual quaternary ammonium compounds based on the total weight of the quaternary ammonium compounds within the composition. 
     
     
         18 . The biocidal composition according to  claim 12 , further comprising a carrier comprised of a solvent or a mixture of solvents. 
     
     
         19 . The biocidal composition according to  claim 18 , wherein the solvent or mixture of solvents comprise water, a low molecular weight alcohol, alkylene glycol ether, a terpene or terpene derivative, and a combination thereof. 
     
     
         20 . The biocidal composition according to  claim 19 , wherein the alcohol is present in an amount of at least 10%. 
     
     
         21 . The biocidal composition according to  claim 12 , further comprising a surfactant or a wetting agent. 
     
     
         22 . The biocidal composition according to  claim 21 , wherein the surfactant is present in a range of 0.01% to 2%. 
     
     
         23 . A method of using the biocidal composition according to  claim 1 , the method comprising:
 sealing a surface with the biocidal composition.   
     
     
         24 . A method of using the biocidal composition according to  claim 12 , the method comprising:
 sealing a surface with the biocidal composition.