Sulfonate composition and preservative composition comprising the sulfonate composition

Abstract

A sulfonate composition obtainable by a process in which a naphthalene ring-containing sulfonic acid is reacted with an amine in the presence of a base oil at a temperature in the range of from 20-80° C. The molar ratio of the sulfonic acid to the amide is in the range of from 0.2-3 (S/A). The invention also provides a preservative composition comprising the present sulfonate composition; a metal article having a coating thereon which coating comprises the present preservative composition; a process for preparing the sulfonate composition; the use of the present sulfonate composition to prevent and/or reduce corrosion in a roll bearing system; and the use of the present preservative composition to prevent and/or reduce corrosion in a roll bearing system.

1 . A sulfonate composition obtainable by a process in which a naphthalene ring-containing sulfonic acid is reacted with an amine in the presence of a base oil at a temperature in the range of from 20-80° C., and wherein the molar ratio of the sulfonic acid to the amine is in the range of from 0.2-3.0. 
     
     
         2 . The sulfonate composition according to  claim 1 , wherein the sulfonic acid is selected from the group consisting of naphthalene sulfonic acid, anthracene sulfonic acid and phenanthrene sulfonic acid. 
     
     
         3 . The sulfonate composition according to  claim 1 , wherein the naphthalene ring-containing sulfonic acid is naphthalene sulfonic acid. 
     
     
         4 . The sulfonate composition according to  claim 1 , wherein the amine is a fatty acid amine. 
     
     
         5 . The sulfonate composition according to  claim 1 , wherein in step (a) the molar ratio of the sulfonic acid to the amine is in the range of from 0.5-1.0. 
     
     
         6 . The sulfonate composition according to  claim 5 , wherein the temperature in step (a) is in the range of from 40-80° C. 
     
     
         7 . A preservative composition comprising the sulfonate composition according to  claim 1 . 
     
     
         8 . The preservative composition according to  claim 7 , comprising in addition an anhydride amide and/or an anhydride amine. 
     
     
         9 . The preservative composition according to  claim 8 , wherein the anhydride amide is succinic acid anhydride amide or maleic acid anhydride amide. 
     
     
         10 . A metal article having a coating thereon that comprises the sulfonate composition according to  claim 1  or the preservative composition according to  claim 8 . 
     
     
         11 . A process for preparing the sulfonate composition according to  claim 1 , wherein a naphthalene ring containing sulfonic acid is reacted with an amine in the presence of a base oil at a temperature in the range of from 20-80° C., and wherein the molar ratio of the sulfonic acid to the amine is in the range of from 0.2-3.0. 
     
     
         12 . Use of the preservative composition according to  claim 7  to prevent and/or reduce corrosion in a roll bearing system. 
     
     
         13 . Use of the sulfonate composition according to  claim 5  to prevent and/or reduce corrosion in a roll bearing system.