Substituted urea and oxime modified amino crosslinking agents, curable compositions containing the same and process for preparing pyrrolidone urea

An amino crosslinking agent selected from the group consisting of

• (i) a triazine compound represented by the formula (I) ##STR13## (ii) a glycoluril compound represented by the formula (II) ##STR14## (iii) an oligomer of (i) or of (ii), and (iv) a mixture of at least two of any of (i), (ii) and (iii),
• wherein Z is selected from the group consisting of --N(CH.sub.2 R).sub.2, aryl having 6 to 10 carbon atoms, alkyl having 1 to 20 carbon atoms, cycloalkyl having 6 to 10 carbons and an acetyl group, and
• each R is independently selected from the group consisting of
• (a) a substituted urea group represented by the formula ##STR15## wherein B is an unsaturated or saturated aliphatic ring forming group having 3 to 5 carbon atoms optionally substituted by a keto oxygen, or a bridged aromatic,
• (b) an oxime blocked carbamate group represented by the formula ##STR16## wherein R.sup.1 and R.sup.3 are independently selected from an alkyl group having 1 to 8 carbon atoms and can together form a cyclic ring having a total of up to 16 carbon atoms including substitution,
• (c) --OR.sup.3, wherein R.sup.3 is hydrogen or an alkyl group having 1 to 12 carbon atoms,
• (d) ##STR17## wherein R.sup.4 is an alkyl group having 1 to 18 carbon atoms, cycloalkyl group having 6 to 10 carbons or an aryl group having 6 to 20 carbon atoms, and
• (e) ##STR18## wherein R.sup.5 is hydrogen, an alkyl group having 1 to 18 carbon atoms, cycloalkyl group having 6 to 10 carbons or an aryl group having 6 to 20 carbon atoms, provided that at least one R group is selected from or (b).