Pretreatment of plastic surfaces for metallization to improve adhesion
US10526709B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 15, 2016 |
| Grant date | Jan 7, 2020 |
| Priority date | — |
| Expiry date | Nov 15, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D5/56
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention relates to the adhesional pretreatment of plastics surface prior to their metallization by chemical or electrochemical methods and may be used in those industrial fields where decorative or functional metallic coatings on top of the plastic surfaces are needed. The purpose of the proposed invention is a high-quality adhesional pretreatment of plastic surface prior to metallization. The purpose is achieved by treating the plastic before to etch it 5-15 min at 50-70° C. in the alcaline permanganic solution containing 1-3M NaOH and 0.1-0.5 M permanganate ions and acidic permanganic etching solution additionally contains 0.5-8.0 M of copper nitrate and the etching is performed at room temperature during 5-60 min.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.