Method for depositing a barrier coating on a polymeric substrate and composition comprising said barrier coating
US6586048B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2001 |
| Grant date | Jul 1, 2003 |
| Priority date | — |
| Expiry date | Jun 14, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31931
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention relates to a method for depositing a parylene polymer barrier coating on a polymeric substrate for improving the chemical resistance of the substrate. The method comprises the steps of thoroughly treating a surface portion of the substrate to remove any contaminants, depositing at least one layer of parylene polymer on the contaminant-free surface portion via chemical vapor deposition, and then annealing each of the at least one layer of parylene polymer for a sufficient time. The present invention also relates to a composition for a barrier coating on a polymeric substrate comprising at least one layer of parylene polymer bonded to the surface of the polymeric substrate. The substrate can be a silicone rubber keypad.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.