Patent ID: 8097399

Claim:
An optical moulding composition comprising, in weight percent: (a) at least two curable components: (i) a first component in an amount of at least 80%, based on the total weight of the curable components in the composition, the first component comprising an acrylate and an acid amplified system comprising at least one cationically photocurable material, a cationic photocuring initiator, and an acid amplifier, the first component being photocurable and such that, when cured in the presence of a photocuring initiator by exposure to UV radiation having an energy of 30 mJ/cm 2 , at least 90% by weight of the first component is cured within 50 milliseconds, and (ii) a curable second component in an amount of at least 5% and at most 15% by weight of the total curable components in the composition, the second component being a compound having at least one terminal thiol group; (b) 0.01 to 10%, by weight, of a radical photoinitiator, (c) 0.001 to 5% by weight of a stabilizer, and (d) 0 to 20% by weight of auxiliary materials.