Water-dilutable binders for cationic electrocoating finishes...

Details Water-dilutable binders for cationic electrocoating finishes... Water-dilutable binders for cationic electrocoating finishes...

C - Chemistry, Metallurgy

09

D

402/254

C09D 5/44 (2006.01) C08G 59/04 (2006.01) C08G 59/14 (2006.01)

Patent

CA 1266546

Abstract The invention relates to water-dilutable binders for cationic electrocoating finishes. For the preparation of the binders, a di-epoxide compound, together with at least one mono-epoxide compound if desired, is converted by a polyaddition, carried out at 100 to 195°C and initi- ated by a monofunctionally reacting initiator carrying either an alcoholic OH group, a phenolic OH group or an SH group, to form an epoxy resin which then subsequently is modified with A) primary and/or secondary amines or their salts and/or the salt of a tertiary amine, a sulfide/acid mixture or a phosphine/acid mixture and with, if desired, B) a polyfunctional alcohol, a polycarboxylic acid, a polysulfide or a polyphenol.

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