Phenylisocyanate based urethanacrylate with high refraction index

摘要

An urethane acrylate compound, or its corresponding salt, solvate or a solvate of a salt, is new. An urethane acrylate compound of formula (I), or its corresponding salt, solvate or a solvate of a salt, is new. R 1-R 5 : H, halo, 1-6C alkyls, trifluoromethyl, 1-6C alkylthios, 1-6C alkylselenos, 1-6C alkyltelluros or nitro; R 6 and R 7 : H or 1-6C alkyl;and A : optionally saturated or linear or branched 1-6C alkyl radical or a polyalkylene oxide radical having 2-6 ethylene oxide or propylene oxide units. Provided that least one of R 1-R 5 is not H. Independent claims are included for the following: (1) preparation of the urethane acrylates (I); (2) a process (P1) involving: providing a polymer matrix comprising the urethane acrylate (I); and subjecting the polymer matrix to electromagnetic radiation such that the urethane acrylate is selectively polymerized; and (3) a holographic optical element/image prepared by the process (P1). [Image].