| 摘要 |
The invention provides a radiation-curable coating composition comprising: (A) 30-90% by weight of a urethane oligomer having three types of moieties: (I) a polyether/polyolefin block copolymeric backbone, (II) an aromatic group having one or more alkyl substituents, and (III) reactive termini, the three types of moieties being connected via urethane and/or urea linkages, the aromatic group being connected to a urethane and/or urea linkage via the one or more alkyl substituents; (B) 5-65% by weight of one or more reactive diluents, each diluent being terminated with at least one end group capable of reacting with the reactive terminus of (A); (C) optionally, 0-10% by weight of at least one photoinitiator; (D) optionally, 0-5% by weight antioxidant; and (E) 0-30% by weight adhesion promoter. The compositions have an excellent combination of properties including good optical clarity, good resistance to moisture and hexane, and high refractive index. |
