Metal working fluid composition for use as spray in mist form

Abstract

A metal working fluid composition for use as a spray in the mist form, which comprises (a) a base oil comprising at least one of mineral oils and synthetic oils and, based on an amount of an entire composition, (b) 1 to 50% by mass of a sulfur-based extreme pressure agent and (c) 0 to 30% by mass of an ester of a carboxylic acid and a process for metal working which comprises supplying the metal working fluid composition in the mist form. The metal working fluid is inexpensive and exhibits the excellent property for working.

1 . A metal working fluid composition for use as a spray in a mist form, which comprises (a) a base oil comprising at least one of mineral oils and synthetic oils and, based on an amount of an entire composition, (b) 1 to 50% by mass of a sulfur-based extreme pressure agent and (c) 0 to 30% by mass of an ester of a carboxylic acid.  
     
     
         2 . A metal working fluid composition for use as a spray in a mist form according to  claim 1 , which comprises 50 to 90% by mass of component (a) based on the amount of an entire composition.  
     
     
         3 . A metal working fluid composition for use as a spray in a mist form according to  claim 1 , wherein component (b) comprises at least one of dihydrocarbyl polysulfides and sulfurized oils and fats.  
     
     
         4 . A metal working fluid composition for use as a spray in a mist form according to  claim 1 , wherein component (c) is at least one of oils, fats and triglycerides which are not oils or fats.  
     
     
         5 . A process for metal working which comprises supplying a metal working fluid composition for use as a spray in a mist form described in  claim 1  in a mist form.