| 摘要 |
<p>Antithrombic medical material having on its surface a film made from a graft copolymer produced by grafting a quaternary ammonium monomer and a hydrophilic monomer onto a hydrophobic polymer, characterized in that an anticoagulant such as heparin is immobilized therein in a depth of at least 45 % from the film surface and that the thickness of the film in which the anticoagulant is immobilized is at least 3 νm. This material has excellent antithrombotic properties and a uniform quality and, particularly, the film is free from discoloration.</p> |
