Radiopaque polyurethanes and catheters formed therefrom
AssigneeCritikon, Inc.
InventorsRonald E. Cambron, Donald J. Dempsey, Kevin M. Mills, Hartley A. Silverwood
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Abstract
Catheters formed from polyurethanes containing sufficient halogenated moieties in the polymer structure to make the polyurethanes radiopaque are disclosed. Such polyurethanes can be prepared by employing halogenated diols and/or halogenated diisocyanate reactants. In preferred cases, the catheters are optically transparent in addition to being radiopaque.
Claims26
A catheter formed from a polyurethane containing sufficient halogenated moieties in the polymer structure to make the catheter radiopaque.
A polyurethane containing sufficient halogenated moieties in the polymer structure to make the polyurethane radiopaque.
A radiopaque polyurethane comprising the reaction product of:
- (a) a diisocyanate;
- and
- (b) a diol selected from the group of low molecular weight diols, high molecular diols, or a combination of both;
- at least one of said diisocyanate and said diol being halogenated and present in a sufficient quantity to make said polyurethane reaction product radiopaque.
A shaped article formed from a polyurethane containing sufficient halogenated moieties in the polymer structure to make the shaped article radiopaque.
A radiopaque optically-transparent chateter formed from a polyurethane comprising a reaction product of a brominated diol and a diisocyanate, said polyurethane containing at least about 10 weight percent bromine in its backbone.
Dependencies are inferred from the claim text.