N,N-'-Dihydroxyalkyl ester substituted imidazolidinediones and coating compositions containing same

A process for making a resin mixture of N,N'-dihydroxyalkyl ester substituted imidazolidinediones comprising the step of reacting (1) an imidazolidinedione of the formula:

• ##STR11## wherein R and R' are independently hydrogen or hydrocarbon groups having from 1 to 8 carbon atoms;
• with (2) a glycidyl ester of the formula:
• ##STR12## wherein R" is a hydrocarbon group having from 1 to 17 carbon atoms at a temperature of from about 50.degree. C. to about 200.degree. C. in the presence of a catalyst so as to obtain a mixture of compounds having the formula:
• ##STR13## where X is ##STR14## with R, R' and R" being as defined above.

A coating composition containing less than about 40 percent organic solvent, consisting essentially of:

• (a) from about 5 percent to about 90 percent of a resin mixture of N,N'-dihydroxyalkyl ester substituted imidazolidinediones having the formula:
• ##STR15## wherein R and R' are independently hydrogen or hydrocarbon groups having from 1 to 8 carbon atoms, X is ##STR16## where the R" groups are independently hydrocarbon groups having from 1 to 17 carbon atoms;
• and
• (b) from about 5 percent to about 80 percent of a crosslinking agent selected from the group consisting of aminoplasts, isocyanates, blocked isocyanates, phenoplasts and mixtures thereof.