Corrosion inhibitor systems using environmentally friendly green solvents

Abstract

Improved anti-corrosion systems or products are disclosed containing individual epoxy and curing agent fractions dispersed in low VOC ester-containing dispersants. Preferably, the epoxy fraction is a conventional epoxy resin, whereas the curing agent is an imidazoline. The dispersant advantageously includes a mixture of carboxylic acid esters, such as alkyl glutarate, succinate, and adipate esters.

We claim: 
     
         1 . A liquid composition comprising an epoxy curing agent in a compatible dispersant, said dispersant selected from the group consisting of C8-C40 monocarboxylic acid esters, C4-C40 polycarboxylic acid esters, and mixtures thereof, the total of the ester groups (—COO—) in said dispersant is from about 15-50% by weight, based upon the total weight of a given volume of the complete dispersant taken as 100% by weight. 
     
     
         2 . The composition of  claim 1 , the total of the ester groups (—COO—) in said dispersant is from about 30-45% by weight, based upon the total weight of a given volume of the complete dispersant taken as 100% by weight. 
     
     
         3 . The composition of  claim 1 , said dispersant including at least one C4-C40 polycarboxylic acid ester. 
     
     
         4 . The composition of  claim 1 , said dispersant comprising a plurality of said esters. 
     
     
         5 . The composition of  claim 4 , said dispersant comprising a plurality of C4-C40 of dicarboxylic acid esters. 
     
     
         6 . The composition of  claim 5 , said dicarboxylic acid esters selected from the group consisting of isobutyl esters of dicarboxylic acids selected from the group consisting of glutaric, succinic, and adipic acids, and mixtures thereof. 
     
     
         7 . A liquid composition comprising an epoxy in a compatible dispersant, said dispersant selected from the group consisting of C8-C40 monocarboxylic acid esters, C4-C40 polycarboxylic acid esters, and mixtures thereof, the total of the ester groups (—COO—) in said dispersant is from about 15-50% by weight, based upon the total weight of a given volume of the complete dispersant taken as 100% by weight. 
     
     
         8 . The composition of  claim 7 , the total of the ester groups (—COO—) in said dispersant is from about 30-45% by weight, based upon the total weight of a given volume of the complete dispersant taken as 100% by weight. 
     
     
         9 . The composition of  claim 7 , said dispersant including at least one C4-C40 polycarboxylic acid ester. 
     
     
         10 . The composition of  claim 7 , said dispersant comprising a plurality of said esters. 
     
     
         11 . The composition of  claim 10 , said dispersant comprising a plurality of C4-C40 of dicarboxylic acid esters. 
     
     
         12 . The composition of  claim 11 , said dicarboxylic acid esters selected from the group consisting of isobutyl esters of dicarboxylic acids selected from the group consisting of glutaric, succinic, and adipic acids, and mixtures thereof. 
     
     
         13 . An anti-corrosion product comprising a liquid composition including an epoxy, a curing agent for the epoxy, and dispersants for the epoxy and curing agent, said dispersants each comprising at least one ester selected from the group consisting of C8-C40 monocarboxylic acid esters, C4-C40 polycarboxylic acid esters, and mixtures thereof, the total of the ester groups (—COO—) in each of said dispersants ranging from about 15-50% by weight, based upon the total weight of a given volume of the complete dispersants taken as 100% by weight. 
     
     
         14 . The product of  claim 13 , the total of the ester groups (—COO—) in said dispersants being from about 30-45% by weight, based upon the total weight of a given volume of the complete dispersant taken as 100% by weight. 
     
     
         15 . The product of  claim 13 , said dispersant including at least one C4-C40 polycarboxylic acid ester. 
     
     
         16 . The product of  claim 13 , said dispersant comprising a plurality of said esters. 
     
     
         17 . The product of  claim 16 , said dispersant comprising a plurality of C4-C40 of dicarboxylic acid esters. 
     
     
         18 . The product of  claim 17 , said dicarboxylic acid esters selected from the group consisting of isobutyl esters of dicarboxylic acids selected from the group consisting of glutaric, succinic, and adipic acids, and mixtures thereof. 
     
     
         19 . A method of treating a metallic surface comprising the step of applying the product of  claim 18  to the surface.