Improved sealing process and sealing agents for aluminum

Details Improved sealing process and sealing agents for aluminum Improved sealing process and sealing agents for aluminum

C - Chemistry, Metallurgy

07

D

260/248, 260/250

C07D 251/26 (2006.01) C07C 309/51 (2006.01) C07D 251/70 (2006.01) C23C 8/18 (2006.01) C25D 11/24 (2006.01)

Patent

CA 1262354

IMPROVEMENTS IN OR RELATING TO ORGANIC COMPOUNDS Abstract of the Disclosure Anodically oxidised aluminium or aluminium alloy surfaces are sealed in the presence of an anti-smut agent which is a colour- less, light-fast, organic compound having a molecular weight of at least 350 and containing i) at least one sulphonic acid group and ii) a carboxy group and a hydroxy group both aromatically bound and located ortho- to each other on the same aromatic ring, preferably a benzene ring.

433901

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