Curable coating compositions containing carbamate functional reactive additives

Abstract

The invention thus provides a curable coating composition comprising (A) a polymer resin comprising active hydrogen-containing functional group other than carbamate, (B) a curing agent having groups that are reactive with said functional groups on (A), and (C) a reactive additive comprising at least one compound having a molecular weight of from 131 to 2000 and comprising at least one primary carbamate group and at least one alkyl group selected from the group consisting of straight chain alkyl groups of more than 10 carbons, branched alkyl groups of from 5 to 30 carbons, and mixtures thereof, wherein one or both of (A) and (B) comprise groups that are reactive with the primary carbamate group of (C). The invention also provides a method of making a preferred embodiment of the reactive additive (C) and the reactive additive (C).

We claim:  
     
         1 . A method a making a carbamate functional reative additive comprising 
 providing a compound comprising at least one epoxy group and at least one branched alkyl group of from 5 to 30 carbon atoms,    reacting said compound with carbon dioxide so as to produce a carbonate functional compound, and    reacting said carbonate functional compound with ammonia so as to produce a carbamate functional reactive additive.