Study on Preparation and Character of UV-absorbing Compound in Seaweeds;
海藻中紫外线吸收物质的制备与特性的研究
Synthesis of ultraviolet absorbent UV-326 by phase transfer catalysis;
相转移催化合成紫外线吸收剂UV-326
Synthesis of β-diketone compounds for UV-A ultraviolet absorbent;
β-二酮类UV-A紫外线吸收剂的合成
Synthesis of Ultraviolet Absorbent UV-326 by Rongalite Method;
保险粉法合成紫外线吸收剂UV-326
Synthesis of benzotriazole UV absorbents via selective catalytic hydrogenation;
选择性加氢合成苯并三唑类紫外线吸收剂的研究
By co-operative function of photochromic material, UV absorbent and polyester paint, the formed film can automatically change color after irradiation, but it can restore intrinsic color.
通过光致变色材料、紫外线吸收剂和涂料的协同作用,当太阳光(或紫外光)照射后,漆膜能自动变色,但在无照射时又能恢复原有颜色。
The different kinds of ultraviolet absorbers were reviewed,and the benzotriazole type UV absorbent were emphatically introduced.
综述了不同种类的紫外线吸收剂,着重介绍了苯并三唑类紫外线吸收剂。
A triazine ultraviolet absorber, 2,4-di(3′,5′-dimethylphenyl)-6-(2′-hydroxyl-4′-hexyloxylphenyl)phenyl-1,3,5 Triazine is synthesized in three steps.
将中间体Ⅱ与NaOH及溴辛烷在DMF中于70℃反应1h,经冷却、抽滤,用二氯甲烷重结晶,得到淡黄色的紫外线吸收剂2,4-二(3′,5′-二甲苯基)-6-(2′-羟基-4′-辛氧基)苯基-1,3,5三嗪各步骤的收率依次为93%,94%,88%。
A triazine ultraviolet absorber,Cyasorb UV-1164 is synthesized in three steps.
将中间体Ⅱ与NaOH及溴辛烷在DMF中于70℃反应1h,经冷却、抽滤,用二氯甲烷重结晶,得到淡黄色的紫外线吸收剂2,4-二(2′,4′-二甲基苯基)-6-(2′-羟基-4′-辛氧基苯基)-1,3,5三嗪,各步骤的收率依次为93%,91%,81%。