ZUSAMMENSETZUNG ZUR HERSTELLUNG VON LINSEN, AUS DIESER ZUSAMMENSETZUNG HERGESTELLTE FRESNEL-LINSE SOWIE ÜBERTRAGUNGSSCHIRM

摘要

A lens forming composition which, when cured, has a refractive index of 1.5 or above and comprises a urethane acrylate prepolymer based on tolylene diisocyanate, as the main component, and 10 to 40 wt% of at least bromoacrylate, 3 to 20 wt% of caprolactone-modified hydroxypivalate neopentyl glycol diacrylate, and 3 to 60 wt% of bis(acryloxyethoxy)bisphenol A; a Fresnel lens prepared therefrom; and a transmission screen (1) comprising a Fresnel lens (3) provided on a base material (2).