Corrosion protection coatings

Abstract

The present invention relates to new coating materials for corrosion control.

1 - 15 . (canceled) 
     
     
         16 . A method of applying corrosion control coats to metallic surfaces, which comprises treating the metallic surface with a formulation which comprises at least one binder, at least one pigment, at least one filler, and at least one compound (D) represented by formula (I) 
       
         
           
           
               
               
           
         
         wherein 
         R 1  and R 3  are selected independently of one another from the group consisting of hydrogen, C 1 -C 18  alkyl, C 6 -C 12  aryl, C 5 -C 12  cycloalkyl, and five- to six-membered heterocycle which comprises oxygen, nitrogen, sulfur, or mixtures thereof, and may each optionally be substituted by aryl, alkyl, aryloxy, alkyloxy, a heteroatom, a heterocycle or a mixture thereof, 
         R 2  is a divalent organic radical, 
         R 4  is methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, pentyl, hexyl, heptyl, octyl, 2-ethylhexyl, phenyl or benzyl, and 
         X is selected from the group consisting of —S—, —SO— and —SO 2 —, 
         wherein the metallic surface is an iron surface, a steel surface, a zinc surface, a zinc alloy surface, an aluminum surface, or an aluminum alloy surface. 
       
     
     
         17 . The method of  claim 16 , wherein R 1  is hydrogen, methyl, ethyl, isopropyl, or phenyl. 
     
     
         18 . The method of  claim 16 , wherein X is a sulfide group. 
     
     
         19 . The method of  claim 16 , wherein R 2  is 1,2-ethylene, 1,2-propylene, 1,3-propylene, 1,2-butylene, 1,2-phenylene or 1,4-phenylene. 
     
     
         20 . The method of  claim 16 , wherein R 2  is 1,2-ethylene. 
     
     
         21 . The method according to  claim 16 , wherein R 3  is hydrogen, methyl, ethyl, isopropyl, n-butyl, tert-butyl, phenyl, benzyl, cyclohexyl or cyclopentyl. 
     
     
         22 . The method according to  claim 16 , wherein the group —X—R 1  is a sulfanyl group (—S—H). 
     
     
         23 . The method according to  claim 22 , wherein further to the compound (D) there is a disulfide (D1) of the following formula 
       
         
           
           
               
               
           
         
         wherein R 3  and R 4  are selected independently of one another from the group consisting of C 1 -C 18  alkyl, C 6 -C 12  aryl, C 5 -C 12  cycloalkyl, and five- to six-membered heterocycle which comprises oxygen, nitrogen, sulfur, or mixtures thereof, and may each optionally be substituted by aryl, alkyl, aryloxy, alkyloxy, a heteroatom, a heterocycle or a mixture thereof, 
         R 3  may additionally be hydrogen, and 
         R 2  is a divalent organic radical, 
         the fraction of the disulfide (D1) not exceeding 30% by weight, based on the compound (D). 
       
     
     
         24 . The method according to  claim 16 , wherein the metallic surface is a steel surface. 
     
     
         25 . The method according to  claim 24 , wherein the steel surface is an untreated steel surface, a galvanized steel surface or an aluminized steel surface. 
     
     
         26 . The method according to  claim 16 , wherein the metallic surface is in the course of service is in contact with atmospheric air.