Medical tool having surface lubricity when wet and preparation thereof

Abstract

Abstract PURPOSE:To improve wet lubricity by combining reactive groups introduced to the surface of a substrate material constituting a medical tool with a water- swellable polymer. CONSTITUTION:A substrate material constituting a medical tool (e.g. a catheter) is irradiated with a low-temp. plasma under a reduced pressure of 0.001-100Torr or in an atmosphere of N2 or air for 0.5-60sec, and to the surface of the material is supplied a compd. having a reactive functional group (e.g. acrylic acid) in a gas phase in the absence of plasma to graft the compd. onto the surface, thus introducing the reactive functional groups to the surface. Then, the material is dipped in a soln. contg. a water-swellable polymer (e.g. a maleic anhydride polymer having an average mol.wt. of 3-5 million) to react with the polymer, i.e., to combine the reactive groups with the polymer.

Inventors

• 👤 Kenichi Shimura
• 👤 賢一 志村
• 👤 Isamu Yamaguchi
• 👤 勇 山口
• 👤 Masato Onishi
• 👤 誠人 大西

Bibliographic Details