| 摘要 |
Cathodically depositable, self-crosslinking paint binders wherein crosslinkable groups are introduced into the binders at 70 to 100.degree.C, preferably in the presence of an organic solvent inert towards isocyanates, by reacting the hydroxyl groups and/or primary and/or secondary amino groups of the binders with doubly blocked triisocyanates of the general formula <IMG> wherein R is an aliphatic, cycloaliphatic or aromatic radical derived from a diisocyanate, R1 is an aliphatic, cycloaliphatic or aromatic radical derived from a diisocyanate which has NCO-groups having predominantly different reactivities, and R2 and R3 represent identical or different radicals of NCO-blocking agents, are described. The self-crosslinking binders have a high crosslinking density.
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