Compositions having antithrombogenic properties and blood contact medical devices using the same
First Claim
1. An antithrombogenic material having an interpenetrating polymer network which comprises(1) a polyether type polyurethane or polyurethane urea containing in its main chain a segment comprising polytetramethylene oxide;
- (2) a water soluble polymer, a water swellable polymer or a combination thereof; and
(3) a room temerpature cross-linking type silane coupling agent capable of being activated by water and induced condensation polymerization with crosslinking which is crosslinked to form a hydrophobic highly crosslinked polysiloxane network in which network the polyether type polyurethane or polyurethane urea, and the water soluble polymer, the water swellable polymer or combination thereof, are entangled.
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Abstract
This invention is a composition having anti-thrombogenic properties, comprising as essential constituent components a polyurethane or polyurethane urea containing polytetramethylene oxide in its main chain, a water soluble and/or water swellable macromolecules, and a silicon-containing compound capable of forming polysiloxane while crosslinking; and a blood contact medical device having such a composition on blood contact surfaces. According to this invention, it is possible to provide on blood contact surfaces a hydrophilic polymer which is excellent in dynamic properties and very rich in the antithrombogenic properties, and the invention can be greatly contributory in the field of blood contact medical devices.
188 Citations
14 Claims
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1. An antithrombogenic material having an interpenetrating polymer network which comprises
(1) a polyether type polyurethane or polyurethane urea containing in its main chain a segment comprising polytetramethylene oxide; -
(2) a water soluble polymer, a water swellable polymer or a combination thereof; and (3) a room temerpature cross-linking type silane coupling agent capable of being activated by water and induced condensation polymerization with crosslinking which is crosslinked to form a hydrophobic highly crosslinked polysiloxane network in which network the polyether type polyurethane or polyurethane urea, and the water soluble polymer, the water swellable polymer or combination thereof, are entangled. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14)
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7. A blood contact medical device characterized in that it comprises a blood contact surface constituted of a polyurethane or polyurethane urea having polytetramethylene oxide in its main chain, a water soluble and/or water swellable macromolecules, and a polysiloxane having crosslinked structure.
Specification