method for preparing moulded products which are partially dyed with different colors or regions

摘要

PCT No. PCT/EP96/00244 Sec. 371 Date Jul. 30, 1997 Sec. 102(e) Date Jul. 30, 1997 PCT Filed Jan. 22, 1996 PCT Pub. No. WO96/23648 PCT Pub. Date Aug. 8, 1996For the fast and rational manufacture of moulded articles, specifically contact lenses, that are partly colored or have regions of different colors, by the casting process, measured amounts of two or more crosslinkable materials of different colors are introduced into the casting mould in the uncrosslinked stated unmixed and, after closing the casting mould, are crosslinked together. By suitably controlling the introduction of the different crosslinkable materials with regard to location and/or time the merging of the colors and the transitions between the colors in the contact lens are influenced in a controlled manner.