Process for producing cathodically depositable paint binders

Details Process for producing cathodically depositable paint binders Process for producing cathodically depositable paint binders

C - Chemistry, Metallurgy

09

D

402/268, 402/44

C09D 5/44 (2006.01) C08G 59/54 (2006.01)

Patent

CA 1228447

ABSTRACT OF DISCLOSURE Cationic synthetic resin binders free of epoxy groups for the formulation of electrodeposition paints are described. The hinders are the reaction product of an epoxy resin carry- ing at least two epoxy groups and having an epoxy equivalent of 190 to 1000, with from 0.1 to 1.0 amino groups per avail- able epoxy group of a secondary amine carrying carboxylic acid amide groups. Upon being crosslinked on stoving with a suit- able hardening component, the binders have improved water dilutability, permitting a reduction of the degree of neutral- ization necessary for electrodeposition application and im- proved intercoat adhesion to addition coats. These improved characteristics are significant with respect to an increase of current yield and in adhering additional coatings of a paint system.

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