Process for producing cathodically process for producing...

Details Process for producing cathodically process for producing... Process for producing cathodically process for producing...

C - Chemistry, Metallurgy

08

G

402/138, 402/155

C08G 18/62 (2006.01) C08G 18/80 (2006.01) C08G 18/81 (2006.01) C09D 5/44 (2006.01)

Patent

CA 1127346

ABSTRACT OF THE DISCLOSURE Binders for cathodically depositable aqueous coating compositions comprising the reaction product, having an NCO-value of zero of (A) polymers carrying reactive hydroxyl groups and having a hydroxyl number of at least about 40 mg KOH/g; and (B) compounds carrying per molecule an average of 0.8 to 1.5, and preferably 1.0, free isocyanate groups and at least one tertiary basic aliphatically bound nitrogen atom. Optionally, the reaction product of (A) and (B) can include as (C) a compound carrying an average of 0.8 to 1.57 and preferably 1.0, free isocyanate groups and from 1 to 3 olefinic double bonds. Coating compositions containing the partially or totaly neutralized reaction product when deposited cathodically in an electrodeposition system will cure at relatively low temperatures and relatively short curing times to provide films having good resistance to water, chemicals, and corrosion.

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