a compound containing cyclic amidine groups and uretdione groups , having the formula : ## str1 ## wherein x is o or nr 2 , r is the hydrocarbon radical of isophorone diisocyanate : ## str2 ## r 1 is a substituted alkylene radical which is substituted with o - 3 ch 3 groups and has 2 - 14 carbon atoms @ r 2 and r 3 are identical or different alkyl radicals having 1 - 10 carbon atoms or are phenyl radicals , n is 0 - 5 , and b is 0 - 1 nco group and / or 1 - 0 imidazoline - blocked nco group of the formula : ## str3 ##