C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
204/97.11
C25D 13/06 (2006.01) B05D 7/00 (2006.01) C09D 5/44 (2006.01) C25D 13/10 (2006.01) C25D 13/22 (2006.01) B05D 1/00 (2006.01)
Patent
CA 1277954
Abstract A process for multicoat cathodic wet-on-wet painting of metallic conductive substrates The invention relates to a process for coating an electrically conductive substrate, the said substrate being immersed in an aqueous bath based on a cationic syn- thetic resin binder which is at least in part neutralized with acids and contains amino and/or hydroxyl groups. The said bath contains a mixture of crosslinking agents as well as pigments, fillers, corrosion inhibitors, paint auxiliary substances, and, if appropriate, catalysts, as well as organic solvents in an amount of up to 15% by weight based on the total weight of the coating, the said substrate being cathodically connected. By the action of direct current, a film is deposited on the substrate, after which the said substrate is removed from the bath and the film is cured by stoving, the mixture of crosslin- king agents comprising at least two crosslinking agents of different reactivities based on activated esters and/or polyisocyanates blocked by different blocking agents. The expression "different reactivities" means that the cross- linking reaction commences by heating to temperatures which are separated by at least 10°C and that crosslinking agent which is first to react is present in an amount of 15 to 60 mol %, based on the mixture of the crosslinking agents. This first coat is rinsed and one or more further cathodic coats are deposited before stoving. After each coat has been rinsed, all the coats are cured together.
498032
Batzill Wolfgang
Dobbelstein Arnold
Geist Michael
Ott Gunther
Schon Georg
Basf Farben + Fasern Aktiengesellschaft
Batzill Wolfgang
Dobbelstein Arnold
Geist Michael
Ott Gunther
LandOfFree
Process for multicoat cathodic wet-on-wet painting of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for multicoat cathodic wet-on-wet painting of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for multicoat cathodic wet-on-wet painting of... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1180990