Surface modification of polymer substrate of any shape by simple, economical graft polymerisation

摘要

In the surface modification of polymer substrates by graft polymerisation of olefinically unsaturated monomer(s) induced by electromagnetic radiation or thermally, the substrate is pre-treated with a photoinitiator (IA) or thermal initiator (IB) and aliphatically unsaturated monomer(s) (II) before grafting. Also claimed are medical-technical and hygiene articles containing or consisting of the modified polymer substrate. Preferably grafting is carried out immediately after pre-treatment and only the monomer used for pre-treatment is graft polymerised; or the pre-treated substrate is treated with (II) and/or different monomer(s) and all the monomer(s) is grafted. The substrate is pre-treated with a mixture of (IA) or (IB), (II) and 0-80 wt.% inert solvent. It may than be contacted with, especially dipped in, other liquid monomer(s) or a solution of other (liquid) monomer(s). Graft polymerisation is carried out with radiation of wavelength 200-400 nm or at 50-150 deg C, especially with IR or microwave radiation.