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US 7,598,298 B2Granted
Reactive hydrophilic oligomers
Assignee3M Innovative Properties Company
InventorsKevin M. Lewandowski, Duane D. Fansler, Michael S. Wendland, Steven M. Heilmann, Babu N. Gaddam
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Abstract
Hydrophilic compositions are described, which are prepared from a first oligomer containing pendent polymerizable groups and pendent hydrophilic groups, crosslinked with a co-reactive second component oligomer possessing photoinitiator groups. The compositions may be used as in preparation of hydrophilic gel coatings or layers for medical devices.
Claims17
A process for making a substrate bearing a coating of a crosslinked polymer composition on at least one surface thereof, comprising the steps of:
- (a) coating onto said substrate a crosslinkable oligomer composition comprising:
- (1) a first component oligomer comprising a plurality of polymerized monomer units having pendent, free-radically polymerizable functional groups, and a plurality of polymerized monomer units having pendent, hydrophilic poly(alkylene oxide) groups;
- and
- (2) a second component oligomer comprising a plurality of polymerized monomer units having pendent, photoinitiator groups;
- and
- (b) photochemically crosslinking said first component oligomer and second component oligomer, in the presence of a photoinitiator, by forming covalent bonds between said pendent, free-radically polymerizable functional groups of said first component oligomer said second component oligomer.
3 more elements
Dependencies are inferred from the claim text.