The present invention relates to photochromic articles that include a substrate and at least one photochromic material that is adapted to change from an unactivated form to an activated form by exposure to radiation substantially in the wavelength range from 380 to 450 nanometers when measured over a range of from 380 to 700 nanometers. The photochromic article is also adapted to retain at least 12 percent of the delta OD measured in the Outdoor Test when tested in the Behind the Windshield Test. The photochromic material can be selected from certain compounds including, for example, fluoranthenoxazines, naphthopyrans, phenanthropyrans, fluoranthenopyrans, and indenonaphthopyrans, which each have bonded thereto at least one chiral or achiral lengthening group that provides the photochromic compound with dichroic properties. The present invention also relates to methods of forming a photochromic article.
本发明涉及光致变色物品,该物品包括基材和至少一种光致变色材料,当在 380 纳米到 700 纳米的范围内测量时,光致变色材料暴露在波长范围大致为 380 纳米到 450 纳米的辐射下,可从未激活形式变为激活形式。在挡风
玻璃后测试中,光致变色物品还能保留室外测试中测得的至少 12% 的 delta OD。光致变色材料可选自某些化合物,包括例如
氟吩噁嗪、
萘并
吡喃、
菲并
吡喃、
氟吩并
吡喃和
茚并
萘并
吡喃,这些化合物都具有至少一个手性或非手性延长基,使光致变色化合物具有二色性。本发明还涉及形成光致变色物品的方法。