Self-lubricating medical articles
AssigneeBecton, Dickinson and Company
InventorsHe Bai, Marc Weimer
Life of this patent
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Abstract
Medical articles formed from a polyurethane-based resin including a modifying oligomer provide enhanced properties. A modifying oligomer incorporated into a backbone, as a side chain, or both of the polyurethane-based resin formed by a diisocyanate, a polyglycol, and a diol chain extender has at least one, preferably two, alcohol moieties (C—OH) and a functional moiety. Exemplary modifying oligomers are: a diol-containing perfluoropolyether incorporated into the backbone, a monofunctional polysiloxane (e.g., monodialcohol-terminated polydimethylsiloxane) incorporated as the side chain, and combinations thereof. Medical articles herein are self-lubricating and/or anti-fouling.
Claims10
A medical article formed from a polyurethane-based resin, which is a reaction product of the following ingredients:
- a diisocyanate;
- a diol chain extender;
- a polyglycol;
- and
- a modifying oligomer incorporated into a backbone of the polyurethane-based resin formed by the diisocyanate, the polyglycol, and the diol chain extender, the modifying oligomer comprising a diol-terminated perfluoropolyether;
- and
- wherein a hard segment content is in the range of from greater than 60% to 75% by weight and a soft segment content of the resin is in the range of from 25% to less than 40% by weight;
- and
- wherein the medical article has a contact angle with water that is in a range of from at least 90° to 105°,
- wherein a concentration of the modifying oligomer of the polyurethane-based resin at a surface of the medical article is higher than a theoretical concentration based on uniform distribution of ingredients of the polyurethane-based resin, and the medical article is effective as a self-lubricating and/or self-anti-fouling medical article.
Dependencies are inferred from the claim text.