Process for the preparation of cathodically depositable,...

Details Process for the preparation of cathodically depositable,... Process for the preparation of cathodically depositable,...

C - Chemistry, Metallurgy

08

G

402/154, 402/155

C08G 18/78 (2006.01) C08G 18/80 (2006.01) C09D 5/44 (2006.01)

Patent

CA 1324698

ABSTRACT OF THE DISCLOSURE Cathodically depositable, self-crosslinking paint binders wherein crosslinkable groups are introduced into the binders at 70 to 100°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 - Image 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.

615367

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