C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
400/7013, 204/97
C09D 5/44 (2006.01) C08G 18/08 (2006.01) C08G 18/64 (2006.01) C08G 18/80 (2006.01)
Patent
CA 1317395
ABSTRACT Aqueous electrocoating agent for cathodic deposition, and process for coating an electrically conductive substrate The invention relates to an aqueous electrocoating agent for cathodic deposition, which contains a synthetic resin binder which carries amino and/or hydroxyl groups and can be rendered water-soluble by addition of acid. The synthetic resin binder contains a mixture of cross- linking agents as well as pigments, fillers, corrosion inhibitors, coating assistants, if appropriate catalysts, and up to 15% by weight, based on the total weight of the coating agent, of organic solvents. The mixture of cross- linking agents consists of two or more crosslinking agents of different reactivities and based on activated esters and/ or polyisocyantes blocked with different blocking agents. Different reactivities are defined as meaning that the crosslinking reactions start at temperatures which are not less than 10°C apart. The crosslinking agent which reacts first is present in a proportion of 15 to 60 mol % based on the mixture of crosslinking agents.
492299
Dobbelstein Arnold
Geist Michael
Ott Gunther
Schon Georg
Basf Farben + Fasern Aktiengesellschaft
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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