Water-soluble copper, copper alloys and non-ferrous metals intermediate cold and hot rolling composition

Abstract

The present invention relates to a water soluble copper, copper alloys and non-ferrous metals intermediate cold and hot rolling composition comprising a base stock oil and, based on the total weight of the composition:—from 1 to 80% by weight of a combination of a monester of fatty acid with polyol and a tetraester of a fatty acid with pentaerythritol the weight monester:tetraester ratio of said combination ranging from 1:20 to 10:1; and—from 0.02 to 2% by weight of an azole derivative. The invention also relates to an oil-in-water emulsion, an intermediate cold rolling process, a hot rolling process and the use of the oil-in-water emulsion in an intermediate cold or hot rolling process.

1 . Water-soluble copper, copper alloys and non-ferrous metals intermediate cold and hot rolling oil composition comprising a base stock oil and, based on the total weight of the composition: 
 from 1 to 80% by weight of a combination of 
 a monoester of a fatty acid with a polyol and  
 a tetraester of a fatty acid with pentaerythritol;  
 the weight monoester:tetraester ratio of said combination ranging from 1:20 to 10:1; and  
   from 0.02 to 2% by weight of an azole derivative.    
     
     
         2 . Water-soluble oil composition according to  claim 1 , further comprising, based on the total weight of the composition, from 0.1 to 20% of a mixture of ethoxylated alcohols having from 5 to 15 carbons atoms and preferably from 12 to 15 carbon atoms.  
     
     
         3 . Water-soluble oil composition according to  claim 1  or  2 , comprising, based on the total weight of the composition, from 3 to 30% by weight of said combination.  
     
     
         4 . Water-soluble oil composition according to any one of  claims 1  to  3 , comprising, based on the total weight of the composition, from 0.05 to 1% of said azole derivative.  
     
     
         5 . Water-soluble oil composition according to any one of  claims 1  to  4 , wherein said weight monoester:tetraester ratio ranges from 1:10 to 5:1.  
     
     
         6 . Water-soluble oil composition according to any one of  claims 1  to  5 , wherein the fatty acid of the monoester has from 16 to 20 carbon atoms and preferably is oleic acid.  
     
     
         7 . Water-soluble oil composition according to any one of  claims 1  to  6 , wherein the polyol of the monoester is glycerol.  
     
     
         8 . Water-soluble oil composition according to any one of  claims 1  to  7 , wherein the fatty acid of the tetraester has from 16 to 20 carbon atoms and preferably is oleic acid.  
     
     
         9 . Water-soluble oil composition according to any one of  claims 1  to  8 , wherein the azole derivative is selected from the group consisting of an aryltriazole, an arylimidazole and an arylthiazole.  
     
     
         10 . Water-soluble oil composition according to  claim 9 , wherein the aryltriazole is selected from the group consisting of benzotriazole, toluol triazole and toluyl triazole.  
     
     
         11 . Water-soluble oil composition according to  claim 9 , wherein the arylimidazole is selected from the group consisting of benzimidazole and 2-(5-aminopentyl) benzimidazole.  
     
     
         12 . Water-soluble oil composition according to  claim 9 , wherein the arylthiazole is benzothiazole.  
     
     
         13 . Water-soluble oil composition according to  claim 10 , wherein the aryltriazole is toluol triazole.  
     
     
         14 . Water-soluble oil composition according to anyone of  claims 1  to  13 , comprising (in weight percentages based on the total weight of the composition) 
 0.1-10% of trialkyl(C 1-4 )phenol;    0.5-4.0% of trialkyl(C 3-10 )phosphate ester;    1-4% of petroleum sulfonate;    0.1-0.5% of aminoalkyl(C 2-3 ) alkanediol(C 2-3 );    1-4% of trialkanol(C 2-4 )amine;    2-10% of a glycerol mono fatty acid (C 16-20 ) ester;    5-15% of pentaerythritol tetra fatted acid (C 16-20 ) ester;    0.5-1.0% of 5-carboxy 4-hexyl 2-cyclohexen 1-octanoic acid;    3-6% of ethoxylated alcohols (C 9-15  comprising 2-10 CH 2 O groups);    0.05-0.3% of triazole derivative;    0.05-0.4% of siloxan based polymer;    the balance being a naphthenic lube base oil or a mixture of naphthenic base oils.    
     
     
         15 . Water-soluble oil composition according to any one of  claims 1  to  14 , in which the base stock oil has a viscosity comprised between 10 and 150 cSt, preferably between 20 and 50 cSt at 40° C.  
     
     
         16 . Oil-in-water emulsion comprising water and from 0.5 to 30%, preferably from 1 to 15% (v/v) of the water-soluble oil composition according to any one of  claims 1  to  15 .  
     
     
         17 . Process for the preparation of a water-soluble oil composition according to any one of  claims 1  to  15 , comprising blending the base stock and the other ingredients under stirring or with any mixing device.  
     
     
         18 . Process for the preparation of an oil-in-water emulsion according to  claim 16 , comprising diluting the oil composition in water under stirring.  
     
     
         19 . Intermediate cold rolling process for rolling copper, copper alloys and non-ferrous metals sheets, comprising applying an effective amount of the emulsion according to  claim 16 .  
     
     
         20 . Intermediate cold rolling process according to  claim 19 , wherein the rolling process is carried out in a breakdown mill and the emulsion comprises, based on the total volume of the emulsion, from 2 to 3% by volume of the water-soluble oil composition according to any one of  claims 1  to  15 .  
     
     
         21 . Intermediate cold rolling process according to  claim 19 , wherein the rolling process is carried out in a finishing mill and the emulsion comprises, based on the total volume of the emulsion, from 4 to 7% by volume of the water-soluble oil composition according to any one of  claims 1  to  15 .  
     
     
         22 . Hot rolling process for rolling copper, copper alloys and non-ferrous metals sheets, comprising applying an effective amount of the emulsion according to  claim 16 .  
     
     
         23 . Hot rolling process according to  claim 22 , wherein the rolling process is carried out in a breakdown mill and the emulsion comprises, based on the total volume of the emulsion, from 2 to 3% by volume of the water-soluble oil composition according to any one of  claims 1  to  15 .  
     
     
         24 . Hot rolling process according to  claim 22 , wherein the rolling process is carried out in a finishing mill and the emulsion comprises, based on the total volume of the emulsion, from 4 to 7% by volume of the water-soluble oil composition according to any one of  claims 1  to  15 .  
     
     
         25 . Use of the water-soluble oil composition according to any one of  claims 1  to  15  to prepare emulsions intended to be used in a copper, copper alloys and non-ferrous metals intermediate cold or hot rolling process.  
     
     
         26 . Use of the water-in-oil emulsion of  claim 16  in an intermediate cold or hot rolling process.