The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 26, 1993
Filed:
Oct. 21, 1991
Holger Kistrup, Esslingen, DE;
Otwin Imhof, Nurtingen, DE;
Abstract
A process treats the waste water which accumulates as used activation solution in the one-step activation, on the basis of acidic palladium/tin solutions, of large-surface plastic substrates, in particular of non-woven fabric, needled felt or open-pored foam sheets, for the purpose of a subsequent chemical metallization. A concentrate composed of palladium chloride and sodium chloride and then a solid tin salt in a molar ratio of 1:1.5 to 1:4, based on the palladium, is added to the waste water. After a certain maturing time, a ready-to-use activation solution is again obtained for activating a plastic substrate and reduces the amount of the waste water hitherto accumulating after the activation has taken place.