Hydrophilic coating and substrates, particularly medical devices, provided with such a coating
US6048620A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 15, 1997 |
| Grant date | Apr 11, 2000 |
| Priority date | — |
| Expiry date | Sep 15, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3158
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A substrate such as a catheter or a guide wire is provided with a lubricous, hydrophilic abrasion-resistant coating by: a) coating said substrate with a first aqueous coating composition comprising an aqueous dispersion or emulsion of a polymer having organic acid functional groups and a polyfunctional crosslinking agent having functional groups being capable of reacting with organic acid groups, and drying the coating to obtain a substantially water-insoluble coating layer still including functional groups being reactive with organic acid groups, and b) contacting the dried coating layer obtained in a) with a second aqueous coating composition comprising an aqueous solution or dispersion of a hydrophilic polymer having organic acid functional groups, and drying the combined coating, the hydrophilic polymer thereby becoming bonded to the polymer of the first coating composition through the crosslinking agent. The drying can be carried out at ambient (room) temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.