Hydrophilic coating and substrates coated therewith having enhanced durablity and lubricity
US6709706B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2003 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Mar 14, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31576
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A substrate, such as a catheter or a guide wire, or a portion of the substrate is provided with a lubricous, hydrophilic abrasion-resistant coating by: (a) coating the substrate with a first aqueous coating composition having 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 water-insoluble coating layer with a second aqueous coating composition having an aqueous solution or dispersion of a hydrophilic polymer having organic acid functional groups, 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 combined coating to form an intermediate coating, whereby the polymer and the hydrophilic polymer of the second composition become bonded to the polymer of the first coating composition through the excess crossl…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.