Process for surface modification of polymer articles
US4770905A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1986 |
| Grant date | Sep 13, 1988 |
| Priority date | — |
| Expiry date | Dec 23, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J7/065
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A process for modifying the surface region of a polymer article by incorporating one or more ingredients therein. Such ingredients may be ultraviolet light stabilizers, antioxidants, anti-static agents, pigments and the like. The polymer article, e.g. a sheet of polyvinyl chloride, is immersed in a liquid (e.g. water) and the immersed article is contacted with a solution of the ingredient in a solvent. The liquid must be one which is non-aggressive towards the article and must also be immiscible with the solvent. Any residual solution remaining on the contacted surface may be displaced therefrom, preferably by directing a jet of water onto the contacted surface, while avoiding escape of any solvent into the atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.