Patent · US Active

Chromium-free plating-on-plastic etch

US11174555B2 · kind B2 · utility

0Cited by

2References

11Claims

0Family size

Assignee

MacDermid Enthone Inc. · US

Inventors

Frank Noffke · Wuppertal, DE
Christoph Werner · Mülheim an der Ruhr, DE
Andreas Konigshofen · Leverkusen, DE

Key dates

Filing date	Nov 22, 2017
Grant date	Nov 16, 2021
Priority date	—
Expiry date	Mar 20, 2038

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23C18/34
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The present invention relates to a chrome free etch for plating on plastic processes, wherein plastic surfaces are contacted in a first etching step with an etching solution at least comprising Mn(IV)-ions and, in a second etching step, with a solution at least comprising Mn(III)- and Mn(VII)-ions prior to the metal plating step.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.