Process for producing thermosetting binders for cathodic...

Details Process for producing thermosetting binders for cathodic... Process for producing thermosetting binders for cathodic...

C - Chemistry, Metallurgy

08

G

400/5120, 400/51

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

Patent

CA 1094707

Abstract of the Disclosure Cathodically depositable, aqueous coating compositions com- prising the reaction product of (A) polycondensates having free hydroxyl groups with a hydroxyl number of at least 40 mg KOH/g, and an average maximum molecular weight of 5000; and (B) a compound having an average of from about 0.8 to 1.5 free isocyanate groups and at least one basic aliphatically bound nitrogen atom. Optionally, there can be included in the reaction product a compound having from about 0.8 to 1.5 free iso- cyanate groups and from 1 to 3 ethylenically unsaturated double bonds. The coating compositions cure at relatively low temperatures and rela- tively short curing times to provide films having excellent resistance to water, chemicals, and corrosion.

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