Functional fluid compositions

Abstract

The present invention relates to a functional fluid composition comprising a glycol as a base material and a diamine-based noise reducer. According to the present invention as such, the functional fluid composition comprising a glycol as a base material and a diamine-based noise reducer represented by chemical formula 1 has an excellent noise reducing effect. In addition, the functional fluid composition of the present invention has an excellent metal corrosion inhibiting effect even, by using a diamine-based compound as a noise reducer, when a metal corrosion inhibitor composed of a triazole-based compound without including an amine-based compound is used as a metal corrosion inhibitor.

1 . A functional fluid composition comprising a glycol as a base material, the composition comprising a diamine-based noise reducer represented by chemical formula 1 below: 
       
         
           
           
               
               
           
         
       
       wherein in chemical formula 1, X is an integer of 1 or greater; and Y and Z are 0 or an integer of 1 or greater, the weight average molecular weight of the compound represented by chemical formula 1 being 400 or more. 
     
     
         2 . The functional fluid composition of  claim 1 , wherein the weight average molecular weight of the compound represented by chemical formula 1 is equal to or more than 400 and equal to or less than 5000. 
     
     
         3 . The functional fluid composition of  claim 1 , wherein the weight average molecular weight of the compound represented by chemical formula 1 is equal to or more than 600 and equal to or less than 5000. 
     
     
         4 . The functional fluid composition of  claim 1 , wherein the diamine-based noise reducer of chemical formula 1 is comprised in a content of 0.05-5.0 wt % based on the total weight of the functional fluid composition. 
     
     
         5 . The functional fluid composition of  claim 1 , wherein the diamine-based noise reducer of chemical formula 1 is comprised in a content of 0.1-5.0 wt % based on the total weight of the functional fluid composition. 
     
     
         6 . The functional fluid composition of  claim 1 , wherein the diamine-based noise reducer of chemical formula 1 is comprised in a content of 0.2-5.0 wt % based on the total weight of the functional fluid composition. 
     
     
         7 . The functional fluid composition of  claim 1 , wherein the composition further comprises at least one additive selected from a group consisting of a metal corrosion inhibitor and an antioxidant. 
     
     
         8 . The functional fluid composition of  claim 7 , wherein the metal corrosion inhibitor is a triazole-based metal corrosion inhibitor and does not comprise an amine-based metal corrosion inhibitor. 
     
     
         9 . The functional fluid composition of  claim 1 , wherein in chemical formula 1, Y=0 and Z=0, the average molecular weight of the compound represented by chemical formula 1 being 400 or more. 
     
     
         10 . The functional fluid composition of  claim 9 , wherein the weight average molecular weight is equal to or more than 400 and equal to or less than 5000. 
     
     
         11 . The functional fluid composition of  claim 9 , wherein the weight average molecular weight is equal to or more than 600 and equal to or less than 5000. 
     
     
         12 . The functional fluid composition of  claim 9 , wherein the diamine-based noise reducer of chemical formula 1 is comprised in a content of 0.05-5.0 wt % based on the total weight of the functional fluid composition. 
     
     
         13 . The functional fluid composition of  claim 9 , wherein the diamine-based noise reducer of chemical formula 1 is comprised in a content of 0.1-5.0 wt % based on the total weight of the functional fluid composition. 
     
     
         14 . The functional fluid composition of  claim 9 , wherein the diamine-based noise reducer of chemical formula 1 is comprised in a content of 0.2-5.0 wt % based on the total weight of the functional fluid composition. 
     
     
         15 . The functional fluid composition of  claim 9 , wherein the composition further comprises at least one additive selected from a group consisting of a metal corrosion inhibitor and an antioxidant. 
     
     
         16 . The functional fluid composition of  claim 15 , wherein the metal corrosion inhibitor is a triazole-based metal corrosion inhibitor and does not comprise an amine-based metal corrosion inhibitor.