HYDROPHILIZING PLASMA COATING

摘要

The invention relates to a method for hydrophilizing surfaces of polymer workpieces. The method has a step (a) of pretreating the workpiece surfaces in a high-frequency gas plasma which is produced on the basis of an inert gas in order to clean and activate the workpiece surfaces; a step (b) of precoating the pretreated workpiece surfaces with polyacrylic acid using a high-frequency gas plasma made of a gas mixture, said gas mixture being composed of an inert gas and a first gas made of biocompatible, polymerizable carboxy group-containing monomers; and a step (c) of subsequently coating the precoated workpiece surfaces using a second gas substantially containing acrylic acid monomers.

主权项

1. A polymeric workpiece having a hydrophilic surface coating of poly(acrylic acid), PAA, obtainable according to the process of claim 5,
wherein a contact angle of water at the workpiece surface coated with poly(acrylic acid), PAA, has a value in the range of 2 degrees to below 10 degrees.