Phthalate ester as metal working lubricant

Abstract

A water-based lubricant is provided that includes a phthalate ester in an amount of about 2% to about 20% based on the weight of the final composition and water in an amount of about 60% to about 93% based on the weight of the final composition. Also provided are a method of making the water-based lubricant and a method of metalworking using the water-based lubricant.

1 . A method of making a water-based lubricant composition comprisng the steps of 
 providing waters    providing a phthalate ester having at least one terminal hydroxyl group, wherein the phthalate ester is a reaction product that has been formed by 
 a. reacting phthalic anhydride with at least one alcohol, wherein the alcohol is either 
 (1) a fatty alcohol having the formula ROH, where R is C 4  to C 22  branched or linear; or  
 (2) a polyol having the formula HO—R 1 —OH, wherein R 1  represents: 
 (a) alkylene groups of 2 to 10 carbon atoms;  
 (b) —CH 2 —R 2  —CH 2 — wherein R 2  represents:  
                     
 (c) —(R 3 O) n —R 3 — 
 
 
   where each R 3  independently is an allylene group of 2 to 4 carbon atoms, and n is an integer of from 1-200; and 
 b. reacting the product resulting from the phthalic anhydride alcohol reaction with an alkoxylating agent to produce the phthalate ester reaction product having at least one terminal hydroxyl group; and  
 mixing the phOhalate ester and water.  
   
   
   
       2 . The method of  claim 1  further comprising the steps of: 
 providing at least one other desirable ingredient; and    mixing the phthalate ester, water and at least one other desirable ingredient.    
   
   
       3 . The method of  claim 1  wherein the phthalate ester is provided in an amount of 2% to 20% based on the weight of the final composition; and 
 the water is provided in an amount of 60% to 93% based on the weight of the final composition.    
   
   
       4 . The method of  claim 2  wherein: 
 the phthalate ester is provided in an amount of 2% to 20% based on the weight of the final composition;    the water is provided in an amount of 60% to 93% based on the weight of the final composition; and    the at least one other desirable ingredient is provided in a total amount of 2% to 20% based on the weight of the final composition.    
   
   
       5 . A water-based lubricant composition comprising: 
 water in an amount of 60% to 93% based on the weigh. of the final composition; and    phthalate este in an amount of 2% to 20% based on the weight of the final composition, wherein the phthalate ester has at least one terminal hydroxyl group and is a reaction product that bas been forned by 
 a reacting phthalic anhydride with at least one alcohol, wherein the alcohol is either: 
 (1) a fatty alcohol having the fomula ROH, where R is C 4  to C 22  branched or linear; or  
 (2) a polyol having the formula HO—R 1 —OH, wherein R 1  represents: 
 (a) alkylene groups of 2 to 10 carbon atoms;  
 (b) —CH 2 —R 2 —CH 2 — wherein R 2  represents:  
                     
 (c) —(R 3 O) n —R 3 — 
 
 
   where each R 3  independently is an alkylene grup of 2 to 4 carbon atoms, and n is an integer of *om 1-200; and 
 b. reacting the product resulting from the phthalic anhydride alcohol reaction with an alkoxylating agent to produce the phthalate ester reaction product having at least one terminal hydroxyl group.  
   
   
   
       6 . The water-based lubricant of  claim 5  further comprising: 
 at least one other desirable ingredient in a total amount of 2% to 20% based on the weight of the final composition.    
   
   
       7 . The water-based lubricant of  claim 6  wherein the phthalate ester comprises 5% by weight of the final composition; water comprises 90% by weight of the final composition; and the at least one other desirable ingredient comprises a total of 5% of the final composition.  
   
   
       8 . The water-based lubricant of  claim 5  wherein the at least one other desirable ingredient is triethanolamine.  
   
   
       9 . A method of metalworking comprising the step of, 
 utilizing a water-based lubricant composition comprising:    water in an amount of 60% to 93% based on the weight of the final composition;    a phthalate ester in an amount of 2% to 20% based on the weight of the final composition wherein the phthalate ester has at least one terminal hydroxyl group and is a reaction product that has been formed by 
 a. reacting phthalic anhydride with at least one alcohol, wherein the alcohol is either: 
 (1) a fatty alcohol having the formula ROH, where R is C 4  to C 22  branched or linear; or  
 (2) a polyol having the formula HO—R 1 —OH, wherein R 1  represents: 
 (a) alkylene groups of 2 to 10 carbon atoms;  
 (b) CH 2 —R 2 —CH 2 — wherein R 2  represents;  
                     
 (c) —(R 3 O) n —R 3 — 
 
 
   where each R 3  independently is an alkylene group of 2 to 4 carbon atoms, and n is an integer of from 1-200; and 
 b. reacting the product resulting from the phthalic anhydride alcohol reaction with an alkoxylating agent to produce the phthalate ester reaction product having at least one terminal hydroxyl group.  
   
   
   
       10 . The method of  claim 9  wherein, the water-based lubricant further comprises at least one other desirable ingredient in a total amount of 2% to 20% based on the weight of the final composition.