Water based semi-synthetic metal working fluid composition containing an alkyl alcohol amine

Abstract

The present invention describes a water based semi-synthetic metal working fluid comprising a base oil, an organic acid, emulsifiers, a concentrate additive, water and a microbial growth control agent which comprises an alky alcohol amine.

1 . A semi-synthetic metal working fluid, comprising:
 a. at least one base oil;   b. at least one microbial growth control agent consisting of one or more alkyl amine alcohols with the structure of:   
       
         
           
           
               
               
           
         
         
           wherein R 1  is H or a methyl or ethyl group and R 2  is C 3 -C 6  alkyl or C 5 -C6 cycloalkyl group; 
         
         c. one or more organic acid, 
         d. one or more emulsifiers, 
         e. one or more concentrate additives, and 
         f. water. 
       
     
     
         2 . The semi-synthetic metal working fluid of  claim 1 , wherein R 1  of the at least one microbial growth control agent is H. 
     
     
         3 . The semi-synthetic metal working fluid of  claim 1 , wherein R2 of at least one microbial growth control agent is C3-C6 alkyl or C5-C6 cycloalkyl group. 
     
     
         4 . The semi-synthetic metal working fluid of  claim 1 , wherein the microbial growth control agent further comprises at least two alkyl amine alcohols. 
     
     
         5 . The semi-synthetic metal working fluid of  claim 1 , wherein the microbial growth control agent is n-butyl ethanol amine. 
     
     
         6 . The semi-synthetic metal working fluid of  claim 1 , wherein the microbial growth control agent is n-cyclohexylethanolamine. 
     
     
         7 . The semi-synthetic metal working fluid of  claim 1 , wherein the base oil is selected from naphthenic oils, paraffinic oils, ester oils and mixtures thereof. 
     
     
         8 . The semi-synthetic metal working fluid of  claim 1 , wherein the emulsifier is selected from C16-18 alcohols which have been ethoxylated or propoxylated, ethoxylated C12-C15 alcohols, sodium alkane sulfonate and alky ether carboxylates and mixtures thereof. 
     
     
         9 . The semi-synthetic metal working fluid of  claim 1 , wherein the solubilizer/corrosion inhibitor is selected from ethylhexoic acid, azelaic acid, toll oil fatty acid, 12-hydoxyl-(cis)-9-octadecenoic acid, dicarboxylic acid, 9-octadecenoic acid, sebacic acid, and mixtures thereof. 
     
     
         10 . The semi-synthetic metal working fluid of  claim 1 , wherein the concentrate additive is selected from diethylene glycol butyl ether, ethylene glycol monobutyl ether, propylene glycol butyl ether and mixtures thereof. 
     
     
         11 . The semi-synthetic metal working fluid of  claim 1 , wherein the microbial growth control agent is present in an amount of from 6 to 15 percent by weight of the semi-synthetic metal working fluid. 
     
     
         12 . The semi-synthetic metal working fluid of  claim 1 , wherein the base oil is present in an amount of from 10 to 45 percent by weight of the semi-synthetic metal working fluid. 
     
     
         13 . The semi-synthetic metal working fluid of  claim 1 , wherein the emulsifier is present in an amount of from 5 to 20 percent by weight of the semi-synthetic metal working fluid. 
     
     
         14 . The semi-synthetic metal working fluid of  claim 1 , wherein the solubilizer is present in an amount of from 3 to 10 percent by weight of the semi-synthetic metal working fluid. 
     
     
         15 . The semi-synthetic metal working fluid of  claim 1 , wherein the water is present in an amount of from 20 to 60 percent by weight of the semi-synthetic metal working fluid.