Water-based metal working oil agent

Abstract

A water-based metalworking fluid contains a component (A) of alkanolamine represented by a formula (1) below as an amine component and a component (B) of alkanolamine represented by a formula (2) below as an amine component, a molar ratio of an amine component having a molecular weight of 90 or less to a total of the amine components (the amine component having a molecular weight of 90 or less/the total of the amine components) is 0.67 or less. In the formula, R 1 represents hydrogen or an alkyl group having 1 to 3 carbon atoms; n is 1 to 3; and R 1 may be mutually the same or different. In the formula: R 2 represents an alkyl group having 1 to 10 carbon atoms; and Z 1 and Z 2 each independently represent an alkylene group having 2 to 8 carbon atoms.

1 . A water-based metalworking fluid comprising:
 a component (A) of alkanolamine represented by formula (1) below as a first amine component; and   a component (B) of alkanolamine represented by formula (2) below as a second amine component,   wherein the water-based metalworking fluid has a molar ratio of an amine component having a molecular weight of 90 or less to a total of amine components of 0.67 or less.   
       
         
           
           
               
               
           
         
       
       where each R 1  represents hydrogen or an alkyl group having 1 to 3 carbon atoms; n is 1, 2 or 3; and the R 1 's are mutually the same or different, 
       
         
           
           
               
               
           
         
       
       where R 2  represents an alkyl group having 1 to 10 carbon atoms; and Z 1  and Z 2  each independently represent an alkylene group having 2 to 8 carbon atoms. 
     
     
         2 . The water-based metalworking fluid according to  claim 1 , wherein
 n is 2 or 3.   
     
     
         3 . The water-based metalworking fluid according to  claim 1 , wherein
 the component (A) comprises 1-amino-2-propanol.   
     
     
         4 . The water-based metalworking fluid according to  claim 1 , wherein
 one or both of Z 1  and Z 2  are each an alkylene group having 2 carbon atoms.   
     
     
         5 . The water-based metalworking fluid according to  claim 1 , wherein
 the component (B) comprises N-methyldiethanolamine and cyclohexyldiethanolamine.   
     
     
         6 . The water-based metalworking fluid according to  claim 1 , further comprising an aliphatic carboxylic acid. 
     
     
         7 . The water-based metalworking fluid according to  claim 1 , being diluted with water, wherein the water has an amount that is 200 or less times of the amount of the water-based metalworking fluid by mass.