| 摘要 |
A process for rendering the surfaces of polymeric plastic or rubber material s, which are intrinsically non-polar or only slightly po lar, and hydrophobic, polar or more polar, and hydrophilic, so that amine-contain ing functional groups, and ultimately, a durable tenacio usly adhering, slippery polyurethane, or polyurethane-urea hydrogel coating may s ubsequently be applied to the polymer surface, is disclo sed. The process involves dual plasma-treatment of a polymeric plastic or rubber substrate material; the first treatment being with an oxygen-containing plasma gas, to affix hydroxyl, carboxyl and carbonyl group s to the substrate surface, thereby rendering the surfac e more polar and activated; and the second treatment being with a nitrogen-containing pla sma gas, to affix amine and amino groups to the substrat e surface to make it more hydrophilic and reactive toward terminal isocyanate groups of a polyurethane or polyurethane/urea prepolymer adduct intermediate tie-coat which is subsequently applied to the substrate surface and then converted to a tenaciously adhering, sl ippery hydrogel coating. The process is especially suited to the hydrophilicization of intrinsically non-polar and hydrophobic polymeric pl astic materials, such as polyethylenes, nylons-11 and nylons-12. |
