| abstract |
A PROCEDURE FOR THE PRODUCTION OF PHOTO CHROME OBJECT IS DESCRIBED, CONSISTING OF A POLYMER AND CONTAINING AT LEAST ONE SPYROXAZINE COMPOUND. THE PROCEDURE INCLUDES THE FOLLOWING STAGES: AN ACRYLATE MONOMER OR A METHACRYLATE MONOMER OR A MIXTURE OF VARIOUS OF THESE MONOMERS IS USED AS A MIXED MIXTURE, SOURITIZING, LIQUID, LIQUID IN A CAST MOLD, BEING POLYMERIZED AND HARDENED. THE INVENTION IS CHARACTERIZED BECAUSE SEVERAL PHOTOSENSITIVE COLORING MATERIALS, OF WHICH AT LEAST ONE IS NOT A SPYROXAZINE, ARE ADDED TO OBTAIN A POLYMERIZABLE MIXTURE WITH A NEUTRAL, NEUTRAL, OR GREEN, GREEN COLORATION; SUCH AS THE CONCENTRATION OF THE SPYROXAZINE COMPOUNDS OR EXCEEDS 0.045% BY WEIGHT, IN RELATION TO THE MASS OF THE MONOMER USED; AND SO THAT THE QUANTITY OF POLYMERIZATION INITIATORS IS NOT GREATER THAN 1% BY WEIGHT, IN RELATION TO THE MASS OF THE MONOMER USED. |