Patent ID: 8455094

Claim:
A medical device having surface lubricity in a wet state, comprising: a base layer at least a surface of which is made of a polymer material; a compound supported on at least a part of said base layer and having three or more thiol groups in one molecule; and a surface lubricating layer covering said compound having the thiol groups in the molecule and made of a hydrophilic polymer having a reactive functional group, wherein said compound having the thiol groups is supported on the base layer by irradiation of an ionized gas plasma, and said compound having the thiol groups and said hydrophilic polymer having the reactive functional group are reacted to cause the surface lubricating layer to be bound to the base layer, wherein the compound having the thiol groups in the molecule comprises 1,3,5-benzenetrithiol, tris-[(3-mercaptopropionyloxy)-ethyl]-isocyanurate, triazinetrithiol, trimethylolpropanetris(3-mercaptopropionate), pentaerythritoltetrakis (mercaptoacetate), pentaerythritoltetrakis(3-mercaptopropionate), pentaerythritoltetrakis(3-mercaptobutylate), dipentaerythritolhexakis(3-mercaptopropionate) or a combination thereof.