| 紫外线吸收剂简介 |
| 添加时间：2019/7/31 11:34:24 浏览次数： |
| 作用 Effect 紫外线吸收剂是一种光稳定剂，能吸收阳光及荧光光源中的紫外线部分，而本身又不发生变化。 Ultraviolet absorber is a kind of light stabilizer, which can absorb the ultraviolet part of sunlight and fluorescent light source without changing itself. 由于太阳光线中含有大量对有色物体有害的紫外光，其波长约290-460纳米，这些有害的紫外光通过化学上的氧化还原作用（Redox reaction），使颜色分子最后分解褪色. Because solar light contains a lot of ultraviolet light harmful to colored objects, its wavelength is about 290-460 nanometers. These harmful ultraviolet light decomposes and fades the color molecules through chemical redox reaction. 防止有害的紫外光对于颜色的破坏的方法既有物理的，也有化学的. There are physical and chemical ways to prevent harmful ultraviolet light from destroying color. 这里只简单介绍以化学的方法，即使用紫外线吸收剂对受保护的物体实施有效的防止，或削弱其对颜色的破坏. Here is only a brief introduction of chemical methods, even using ultraviolet absorbents to effectively prevent or weaken the damage to the color of protected objects. 紫外线吸收剂应该具备以下条件 Ultraviolet absorbents should meet the following requirements ①可强烈地吸收紫外线（尤其是波长为290-400nm）；②热稳定性好，即使在加工中也不会因热而变化，热挥发性小；③化学稳定性好，不与制品中材料组分发生不利反应；④混溶性好，可均匀地分散在材料中，不喷霜，不渗出；⑤吸收剂本身的光化学稳定性好，不分解，不变色；⑥无色、无毒、无臭；⑦耐浸洗；⑧价廉、易得，；9.不溶，或难溶于水. (1) It can absorb ultraviolet radiation strongly (especially wavelength 290-400 nm); (2) it has good thermal stability, which will not change with heat even in processing, and has low thermal volatility; (3) it has good chemical stability and does not react adversely with material components in products; (4) it has good miscibility and can be evenly dispersed in materials without frost spraying and seepage; Absorbent itself has good photochemical stability, no decomposition, no color change; _colorless, non-toxic, odorless; _leaching resistance; _cheap, easy to get; 9. insoluble, or insoluble in water. |
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