Process for producing self-crosslinking cationic paint binders

Details Process for producing self-crosslinking cationic paint binders Process for producing self-crosslinking cationic paint binders

C - Chemistry, Metallurgy

09

D

402/43, 400/5411

C09D 5/44 (2006.01) C08G 18/54 (2006.01) C08G 18/80 (2006.01) C08G 18/83 (2006.01) C08G 59/12 (2006.01) C08G 59/14 (2006.01) C08G 59/62 (2006.01) C09D 163/00 (2006.01) H01B 3/40 (2006.01)

Patent

CA 1271589

ABSTRACT OF THE DISCLOSURE A process for producing self-crosslinking cationic paint binders, water-dilutable upon protonation, on the basis of urea group carrying reaction products of modified phenols and epoxy resins as well as with the binders produced accord- ing to the process and their use in stoving paints, particu- larly in electrodeposition paints is described. The process is characterized in that either an aminoalkylation product of a phenol and a semi-blocked diisocyanate carrying an average of at least one secondary amino group, or a substituted urea prepared from a semi-blocked diisocyanate and an amine, which is further reacted with formaldehyde and a phenol, are reacted with an epoxy compound. The paints formulated with these pro- ducts, at stoving temperatures of from 150 to 170°C, give films with excellent corrosion resistance and adhesion.

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