C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/1, 400/5048
C08G 59/00 (2006.01)
Patent
CA 1179443
ABSTRACT The invention relates to a water-dispersable binding agent for electrodepositable cationic coating compositions, which comprises the reaction-product of: (A) low-molecular epoxy resins containing aromatic groups and having an epoxide equivalent weight of less than 375, (B) aliphatic and/or alicyclic polyfunctional alcohols and/or carboxylic acids with a molecular weight of less than 350, (C) optionally. up to 60% by weight of the total weight of the binding agent, of polyfunctional alcohols, carboxylic acids and/or SH-compounds having a molecular weight of 500 - 5000, and (D) primary, secondary and/or tertiary amines and/or the salts thereof, or a sulphide/ acid mixture or a phosphine/acid mixture, the product of reaction between A and B containing between 10 and 45% of aromatic groups, calculated as phenylene groups. The binding agent of the invention enables thicker coatings to be deposited in electrodeposition processes.
400054
Diefenbach Horst
Dobbelstein Arnold
Geist Michael
Basf Farben + Fasern Aktiengesellschaft
Swabey Ogilvy Renault
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