Electrophoretic paint containing bismuth components

Abstract

Electrocoat materials comprising bismuth compounds, further comprising (A) at least one self-crosslinking and/or externally crosslinking binder containing (potentially) cationic or anionic groups and reactive functional groups which (i) with themselves or with complementary reactive functional groups in the self-crosslinking binder, or (ii) in the case of the externally crosslinking binder, with complementary reactive functional groups present in crosslinking agents (B) are able to undergo thermal crosslinking reactions, (B) if desired, at least one crosslinking agent comprising the complementary reactive functional groups, and (C) bismuth subsalicylate of empirical formula C 7 H 5 O 4 Bi.

1 . A composition comprising 
 (A) at least one binder comprising 
 at least one group that is a potentially cationic group, a cationic group, a potentially anionic group, or an anionic group, and  
 one or more reactive functional groups which undergo thermal crosslinking reactions  
   (C) a bismuth subsalicylate compound having an empirical formula of C 7 H 5 O 4 Bi.    
   
   
       2 . The composition of  claim 1 , wherein the bismuth subsalicylate (C) is water-insoluble and/or pulverulent.  
   
   
       3 . The composition of claims  1 , wherein the bismuth subsalicylate (C) has a bismuth content of from 56.5 to 60% by weight.  
   
   
       4 . The composition of  claim 1 , comprising, based on its solids, from 0.05 to 5% by weight of bismuth subsalicylate (C).  
   
   
       5 . The composition of  claim 1 , wherein the binder (A) comprises cationic groups.  
   
   
       6 . The composition of  claim 1 , wherein the one or more reactive functional groups of binder (A) comprise hydroxyl groups.  
   
   
       7 . The composition of  claim 13 , wherein the self crosslinking binder comprises blocked isocyanate groups.  
   
   
       8 . The composition of  claim 14 , wherein the at least one crosslinking agents (B) comprises a blocked polyisocyanates.  
   
   
       9 . The composition of  claim 1 , further comprising at least one additive (D).  
   
   
       10 . The composition of  claim 9 , wherein the additive (D) comprises a pigment.  
   
   
       11 . The composition of  claim 10 , wherein the at least one additive (D) comprises pigments selected from the group consisting of color pigments, effect pigments, electrically conductive pigments, magnetically shielding pigments, fluorescent pigments, extender pigments, anticorrosion pigments, organic pigments, inorganic pigments, and mixtures comprising at least one of the foregoing.  
   
   
       12 . A method of coating a surface, comprising applying the composition of  claim 1  to the surface to create a coated surface and applying another coating to the coated surface before the applied composition is cured.  
   
   
       13 . The electrocoat material of  claim 1  wherein the at least one binder is self crosslinking.  
   
   
       14 . The electrocoat material of  claim 1  further comprising 
 at least one crosslinking agent comprising complementary reactive functional groups reactive with the reactive functional groups of the at least one binder (A).    
   
   
       15 . The electrocoat material of  claim 14  wherein the at least one binder (A) comprises at least one self crosslinking binder and at least one externally crosslinking binder.