Method of providing a substrate with a hydrophilic coating and substrates, particularly medical devices, provided with such coatings
US5702754A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 22, 1995 |
| Grant date | Dec 30, 1997 |
| Priority date | — |
| Expiry date | Feb 22, 2015 |
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 capable of reacting with organic acid groups, and drying the coating to obtain a substantially water-insoluble coating layer having excess polyfunctional including functional groups being reactive with organic acid groups remaining, 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 excess crosslinking agent. The drying can be carried out at ambient (room) temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.