EP 0902849 B1 20000809 - SHORT-TERM HEAT-SEALING OF ANODIZED METAL SURFACES WITH SURFACTANT-CONTAINING SOLUTIONS
Title (en)
SHORT-TERM HEAT-SEALING OF ANODIZED METAL SURFACES WITH SURFACTANT-CONTAINING SOLUTIONS
Title (de)
KURZZEIT-HEISSVERDICHTUNG ANODISIERTER METALLOBERFLÄCHEN MIT TENSIDHALTIGEN LÖSUNGEN
Title (fr)
SCELLEMENT THERMIQUE RAPIDE DE SURFACES METALLIQUES ANODISEES REALISE AU MOYEN DE SOLUTIONS CONTENANT DES TENSIOACTIFS
Publication
Application
Priority
- DE 19621818 A 19960531
- EP 9702620 W 19970522
Abstract (en)
[origin: DE19621818A1] Described is a method of sealing anodized metal surfaces, the method being characterized in that the anodized metal is brought in contact, for a length of time between 0.5 and 2 minutes per micrometre of anodized-layer thickness, with an aqueous solution having a temperature between 75 DEG C and the boiling point and a pH in the range 5.5 to 8.5 and containing: a) a total of 0.0004 to 0.05 g/l of one or more cationic, anionic or non-ionic surfactants; and b) a total of 0.0005 to 0.5 g/l of one or more organic acids selected from the group comprising the cyclic polycarboxylic acids with 3 to 6 carboxyl groups and the phosphonic acids. The preferred surfactants are non-ionic surfactants and the preferred acids are polyphosphinocarboxylic acids. Optionally present are alkali-metal and/or alkaline-earth metal cations, preferably Li and/or Mg ions, in amounts of 0.0001 to 5 g/l.
IPC 1-7
IPC 8 full level
C25D 11/24 (2006.01); C25D 11/18 (2006.01)
CPC (source: EP KR US)
C25D 11/24 (2013.01 - KR); C25D 11/246 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES FR GB IT LI NL SE
DOCDB simple family (publication)
US 6059897 A 20000509; AR 007357 A1 19991027; AT E195356 T1 20000815; AU 2959897 A 19980105; AU 719630 B2 20000511; CA 2257253 A1 19971211; CN 1219984 A 19990616; DE 19621818 A1 19971204; DE 59702148 D1 20000914; EP 0902849 A1 19990324; EP 0902849 B1 20000809; ES 2150250 T3 20001116; JP 2000511972 A 20000912; KR 20000016130 A 20000325; PL 330016 A1 19990426; TR 199802338 T2 19990222; WO 9746738 A1 19971211; ZA 974742 B 19971201
DOCDB simple family (application)
US 19439198 A 19981130; AR P970102350 A 19970530; AT 97923978 T 19970522; AU 2959897 A 19970522; CA 2257253 A 19970522; CN 97195000 A 19970522; DE 19621818 A 19960531; DE 59702148 T 19970522; EP 9702620 W 19970522; EP 97923978 A 19970522; ES 97923978 T 19970522; JP 50015598 A 19970522; KR 19980709697 A 19981128; PL 33001697 A 19970522; TR 9802338 T 19970522; ZA 974742 A 19970529