EP 0043680 B1 19841205 - PROCESS FOR REMOVING CONTAMINANTS FROM A TIN SURFACE
Title (en)
PROCESS FOR REMOVING CONTAMINANTS FROM A TIN SURFACE
Publication
Application
Priority
US 16356680 A 19800627
Abstract (en)
[origin: EP0043680A1] An aqueous alkaline cleaning solution for removing lubricants or other soiling contaminants from tin without visibly etching it has a pH of about 11 to 13, imparted by an effective amount of an alkaline component and also contains, serving as inhibitor, from 0.02 g/l to 0.06 g/l of one or more quinones and/or polyhydroxybenzenes, these being either unsubstituted or substituted with halo, alkyl, alkoxy, carboxyl, nitro and/or cyano substituents. To prevent precipitation of the calcium and/or magnesium ions which cause water-hardness the solutions desirably contain at least about 0.1 g/l of a polyelectrolyte. The cleaning process using these solutions is operated at from about 100 DEG F to about 130 DEG F (approx. 38 DEG C to 54 DEG C). A solid cleaning composition or an aqueous concentrate can be dissolved in water to form the desired solution.
IPC 1-7
IPC 8 full level
CPC (source: EP KR)
Designated contracting state (EPC)
BE DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0043680 A1 19820113; EP 0043680 B1 19841205; AT 376708 B 19841227; AT A285381 A 19840515; AU 546180 B2 19850822; AU 7219681 A 19820114; BR 8104061 A 19820316; DE 3124614 A1 19820506; DE 3167595 D1 19850117; DK 285181 A 19811228; ES 503463 A0 19830201; ES 8302120 A1 19830201; JP S5739181 A 19820304; JP S6040509 B2 19850911; KR 830006417 A 19830924; KR 860000042 B1 19860130; MX 162868 B 19910702
DOCDB simple family (application)
EP 81302888 A 19810626; AT 285381 A 19810626; AU 7219681 A 19810626; BR 8104061 A 19810626; DE 3124614 A 19810623; DE 3167595 T 19810626; DK 285181 A 19810626; ES 503463 A 19810627; JP 10037881 A 19810626; KR 810002287 A 19810624; MX 18799681 A 19810625