Title:
SURFACE IMPROVED MEDICAL TOOL IMPROVED BY SURFACE POLYMERIZATION
Document Type and Number:
Japanese Patent JP3233677
Kind Code:
B2
Abstract:
PURPOSE: To provide a surface-improved layer excellent in surface lubricity and biocompatibility in a medical tool by previouly providing a high molecular compound having a radical polymerization starting group in its principal chain to the surface of the base material, so that the radically polymerizable monomer is polymerized on the surface of the material.
CONSTITUTION: A medical tool such as a catheter requires surface lubricity for facilitating the insertion into a blood vessel or tissue and for preventing the tissue from being injured, and also requires biocompatibility. Therefore, a high molecular compound having a radical polymerization starting group in its principal chain is provided to the surface of the base material of the medical tool, and after low-temperature plasma has been irradiated or at the time of irradiation, a radically polymerizable monomer is supplied in the gaseous phase for polymerizing it on the surface of the material. Thereby, a surface improved layer including a copolymer of a hydrophilic polymer and a compositional polymer, or a surface improved layer including a copolymer in which water-soluble high molecular chain have been made insoluble is formed.
Inventors:
Makoto Ohnishi
Kenichi Shimura
Naoki Ishii
Kenichi Shimura
Naoki Ishii
Application Number:
JP11649992A
Publication Date:
November 26, 2001
Filing Date:
May 11, 1992
Export Citation:
Assignee:
Terumo Corporation
International Classes:
A61L27/00; A61L29/00; C08F2/52; C08F2/54; C08J7/16; (IPC1-7): A61L27/00; A61L29/00
Other References:
Ｐｏｌｙｍｅｒ，Ｖｏｌ．３２，Ｎｏ．１（１９９１），ｐ．１９−２８