Cold temperature stable biocidal composition

Abstract

Provided is a synergistic biocidal composition comprising a biocidal N-(2-nitroalkyl) morpholine compound of formula I: where R, x, and y are as defined herein, together with an aromatic alcohol. The composition is cold temperature stable and is therefore useful for the control of microorganisms in a variety of matrices, including liquid fuels.

1 . A cold temperature stable biocidal composition comprising:
 a compound of the formula I:   
       
         
           
           
               
               
           
         
         where R is hydrogen, methyl or ethyl; x is 1 or 2; y is 0 or 1, and the sum of x and y is 2; and 
         an aromatic alcohol. 
       
     
     
         2 . The cold temperature stable biocidal composition of  claim 1 , wherein R is ethyl. 
     
     
         3 . The cold temperature stable biocidal composition of  claim 1 , wherein y is 1. 
     
     
         4 . The cold temperature stable biocidal composition of  claim 1 , wherein y is 0. 
     
     
         5 . The cold temperature stable biocidal composition of  claim 1 , wherein the compound of formula (I) is selected from: N-(2-nitroethyl)morpholine, N-(2-nitropropyl)morpholine, N-(2-nitrobutyl)morpholine, 2-nitro-1,3-dimorpholinopropane, 2-methyl-2-nitro-1,3-dimorpholinopropane, 2-ethyl-2-nitro-1,3-dimorpholinopropane, and mixtures of two or more thereof. 
     
     
         6 . The cold temperature stable biocidal composition of  claim 1 , wherein the compound of formula (I) comprises a mixture of N-(2-nitrobutyl)morpholine and 2-ethyl-2-nitro-1,3-dimorpholinopropane. 
     
     
         7 . The cold temperature stable biocidal composition of  claim 1 , wherein the aromatic alcohol is selected from phenoxyethanol, benzyl alcohol, and aromatic glycol ethers. 
     
     
         8 . The cold temperature stable biocidal composition of  claim 1 , wherein the compound of formula (I) comprises a mixture of N-(2-nitrobutyl)morpholine and 2-ethyl-2-nitro-1,3-dimorpholinopropane and the aromatic alcohol is phenoxyethanol. 
     
     
         9 . A blend comprising a liquid fuel and the biocidal composition of  claim 1 . 
     
     
         10 . A blend according to  claim 9  wherein the liquid fuel is gasoline, diesel, biodiesel, a water-fuel emulsion, an ethanol-based fuel, an ether-based fuel, diesel oil, fuel oil, or kerosene based fuel. 
     
     
         11 . A method for providing microorganism resistance to a matrix susceptible to growth of microorganisms, the method comprising including in the matrix an effective amount of the biocidal composition of  claim 1 . 
     
     
         12 . The method of  claim 11  wherein the matrix is aqueous, non-aqueous, or a mixture of aqueous and non-aqueous. 
     
     
         13 . The method of  claim 12  wherein the matrix is a metalworking fluid, a die cast lubricant, a mold release agent, a paint, paint spray booth wash water, a coating, an adhesive, a caulk, a sealant, a mineral slurry, an ink, petroleum (crude oil), or a liquid fuel. 
     
     
         14 . The method of  claim 13  wherein the liquid fuel is gasoline, diesel, biodiesel, a water-fuel emulsion, an ethanol-based fuel, an ether-based fuel, diesel oil, fuel oil, or kerosene based fuel.