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将三溴苯酚和三聚氯氰溶解于甲苯溶剂中,以四甲基氯化铵为催化剂制备2,4,6-三-(2,4,6-三溴苯氧基)1,3,5-三嗪阻燃剂,通过消除氯化氢的方式进行反应,过程中无水产生,可以避免含水体系导致的副产物,获得99%以上的产率;添加2%催化剂与1%催化剂相比,反应时间缩短4 h,在8 h以内完成反应,催化剂可以提高反应效率。与含水条件下的反应相比,产物中无明显水解副产物产生;与乙酸乙酯为反应溶剂的体系相比,产物中不会产生与乙酸乙酯反应的副产物。
The tribromophenol and cyanuric chloride are dissolved in toluene solvent, and 2,4,6-tris- (2,4,6-tribromophenoxy) 1,3 is prepared by using tetramethylammonium chloride as a catalyst. 5-triazine flame retardant, through the elimination of hydrogen chloride in the way of reaction, the process of anhydrous, can avoid by-products resulting from aqueous system to obtain more than 99% yield; Add 2% catalyst Compared with 1% The reaction time is shortened by 4 h, and the reaction is completed within 8 h. The catalyst can improve the reaction efficiency. Compared with the reaction in aqueous condition, there is no obvious hydrolysis by-product in the product; compared with the system in which ethyl acetate is the reaction solvent, no by-products reacted with ethyl acetate will be produced in the product.