| abstract |
A transparent material obtained by a heat-induced reaction of a curable composition and an optical instrument, preferably an ophthalmic lens, comprising such a material are provided. (A) a polyurethane-based prepolymer and (b) an aromatic diamine, in particular an aromatic diamine of the formula (I), of the diamine of the formula (I) with respect to the number of isocyanate functional groups in the prepolymer (a). The ratio of the number of amine functional units is 0.92 to 0.98, and (c) polystyrene-block-polybutadiene-block-poly (methyl methacrylate) block copolymer is (a), (b), And a curable composition comprising at least 5% by weight relative to the total weight of (c), such a composition, and a transparent optical material obtained by heat treating said composition Method. [Selection figure] None |