Corrosion inhibitors for silver (ii)

Details Corrosion inhibitors for silver (ii) Corrosion inhibitors for silver (ii)

C - Chemistry, Metallurgy

11

D

C11D 7/22 (2006.01) C11D 3/00 (2006.01) C11D 3/02 (2006.01) C11D 3/12 (2006.01) C11D 3/16 (2006.01) C11D 3/20 (2006.01) C11D 3/28 (2006.01) C11D 3/30 (2006.01) C11D 3/33 (2006.01) C11D 3/34 (2006.01) C11D 3/36 (2006.01) C11D 7/26 (2006.01) C11D 7/32 (2006.01) C11D 17/00 (2006.01) C11D 17/06 (2006.01) C23F 11/10 (2006.01)

Patent

CA 2162459

The invention concerns the use of organic redox compounds, in particular ascorbic acid, indole, methionine N-(C1-C4 alkyl) glycines, 2-phenylglycine or coupler and/or development compounds selected from the group comprising diaminopyridines, aminohydroxypyridines, dihydroxypyridines, heterocyclic hydrazones, aminohydroxypyrimidines, dihydroxypyrimidines, tetraaminopyrimidines, triaminohydrox- ypyrimidines, diaminodihydroxypyrimidines, dihydroxynaphthalines. naphthols, pyrazolones, hydroxyquinolines, aminoquinolines, primary aromatic amines which have, in addition, a free hydroxy or amino group, or a hydroxy or amino group substituted with C1-C4 alkyl or C2-C4 hydroxyalkyl groups, at the ortho, meta or para position, and di- or trihydroxybenzenes as silver-corrosion protection agents in dishwasher washing agents, in particular low-alkali dishwaster washing agents.

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