Abstract:
This invention is concerned with a photosensitive composition having, as a pendant, Alpha -phenyl cinnamylidene acetyl group of the generic formula:
Abstract:
A HIGHLY PHOTOSENSITIVE COMPOSITION WHICH, OWING TO THE SYNERGISTIC EFFECT TO THE CINNAMOYL AND AZIDO GROUPS. TWO TYPICAL PHOTOSENSITIVE GROUPS WHICH ARE PRESENT IN ITS MAIN STRUCTURE, SHOWS A SPECTRAL RANGE SENSITIVITY WHICH IS EXPANDED TO THE LONG WAVELENGTH REGION, THIS SENSITIVITY HAVING NEVER BEEN OBTAINED WITH PHOTOSENSITIVE COMPOSITIONS HITHERTOFORE AVALIALBLE.
Abstract:
A VARIABLE-TRANSMITTANCE GLASS, HAVING A HIGH RESPONSE SPEED TO LIGHT, CONSISTING ESSENTIALLY OF 50-70% OF SI02, 10-26% OF B2O3, 6-14% OF AL2O3 AND 5-15% OF ALKALI METAL OXIDES INCLUDING K2O AND LI2O IN A RATIO OF FROM 1:0.1 TO 1:0.7, WITH THE CONTENT OF OTHER ALKALI METAL OXIDES KEPT BELOW THE LI2O CONTENT, ALL OF WHICH MAKE A TOTAL OF 100%, PLUS 0.05-1.0% OF AG, AT LEAST AN EQUIVALENT PERCENTAGE OF AT LEAST ONE HALOGEN TO THE PERCENTAGE OF AG TO FORM SILVER HALIDE CRYSTALS, AND 0.005-0.03% OF CUO, ALL PERCENTAGES BEING BY WEIGHT.