Durable hydrophobic structured surface

摘要

The present invention relates to a scratch-resistant micro- and/or nanostructured surface comprising a plurality of micro-scale and/or nano-scale surface elements, said surface being essentially unchanged when being subjected to 10 rubbing cycles according to A.A.T.C.C. test method 8-1972 using a cotton cloth and a total stamp weight of 300 g, and comprising a polymeric material having 1) an elongation at break of at least 10%, 2) an irreversible relative plastic deformation (permanent set) of less than 2% and a 3) a tensile strength of at least 5 MPa. The present invention furthermore relates to a hydrophobic micro- and/or nanostructured surface comprising a plurality of micro-scale and/or nano-scale surface elements and having a static contact angle against water of at least 90, said surface comprising a polymeric material having 1) an elongation at break of at least 10%, 2) an irreversible relative plastic deformation (permanent set) of less than 2% and a 3) a tensile strength of at least 5 MPa.

主权项

1. A hydrophobic micro- and/or nanostructured surface comprising a plurality of micro-scale and/or nano-scale surface elements and having a static contact angle against water of at least 90°, said surface being essentially unchanged when subjected to 10 rubbing cycles according to A.A.T.C.C. test method 8-1972 using a cotton cloth and a total overlying weight of 300 g, said surface comprising a polymeric material having
1) an elongation at break of at least 10%, 2) an irreversible relative plastic deformation (permanent set) of less than 2% and a 3) a tensile strength of at least 5 MPa, wherein the polymeric material is obtained by curing a UV- or electron beam curable precursor comprising a) at least 60 weight % of one or more crosslinkable oligomer and/or polymer compounds selected from a group comprising polyurethanes, polyacrylates, epoxy acrylates, silicone acrylates, and polyether acrylates, b) 2-40 weight % of one or more reactive diluents selected from a group of UV-curable monomers containing one or more acrylate, methacrylate or vinyl groups, c) 0.2-5 weight % of one or more hydrophobic additives selected from a group of additives comprising silicones, fluorochemicals and long-chain alkyl compounds, and d) 0-5 weight % of one or more photoinitiators.