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| Synthesis and Application of Cationic Coumarin Fluorescent Brighteners |
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| DOI：10.11980/j.issn.0254-508X.2015.08.003 |
| Key Words:fluorescent brighteners coumarin cationic paper-making chemicals |
| Fund Project:陕西省自然科学基金项目(2009JM2010)。 |
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| Abstract:Based on the Pechmann method, 7-amino-4-methyl coumarin fluorescent brighteners was synthesized by using 3-amino phenol and ethyl acetoacetate as saw material and catalyzing by Lewis acid. Then, the cationic 7-amino-4-methyl coumarin fluorescent brighteners was further prepared by etherization with the cationic etherifying agent 2,3-epoxypropyltrimethylammonium chloride. Its structure was characterized by FT-IR and 1HNMR, and its optical properties were studied by the ultraviolet spectrum and fluorescence spectrum. Its application of yellowing inhibition on paper was evaluated by the UV accelerated aging test. The result showed that the cationic coumarin fluorescent brighteners had good hydrophilicity and could inhibit paper yellowing for a long time. |
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