| 紫外线吸收剂应该具备以下条件 |
| 添加时间：2020/1/18 16:30:48 浏览次数： |
| 紫外线吸收剂应该具备以下条件：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。紫外线吸收剂按化学结构可分为以下几类：水杨酸酯类、苯酮类、苯并三唑类、取代丙烯腈类、三嗪类和其他类。 UV absorbers should have the following conditions: ① strong absorption of UV (especially the wavelength of 290-400nm); ② good thermal stability, which will not change due to heat even in the processing, with small thermal volatility; ③ good chemical stability, which will not react unfavorably with the material components in the products; ④ good miscibility, which can be evenly dispersed in the materials, without frost spraying and seepage; ⑤ absorption The collector itself has good photochemical stability, does not decompose or change color; ⑥ is colorless, non-toxic and odorless; ⑦ is washable; ⑧ is cheap and easy to obtain. According to the chemical structure, UV absorbers can be divided into the following categories: salicylates, benzoketones, benzotriazoles, substituted acrylonitrile, triazine and others. |
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