| 摘要 |
Organic glass with a high refractive index is obtained by the cross-linking of liquid compositions containing a urethane resin, represented by the formula having the structure (I), <CHEM> wherein R, R1, R2, R3, X and n have the meaning defined in the text; this resin is diluted with one or more reactive compounds of the acrylate and/or methacrylate and/or styrene type. The organic glass obtained by the thermal cross-linking of these compositions is characterized by a good transparency, hardness and processability as well as a refractive index nD, measured at 20 DEG C, which is between 1.54 and 1.60. |
