Colored flame retardant charring agent tetraPEPA oxy-p-benzoquinone compound and preparation method thereof
A technology of tetrachloro-p-benzoquinone and a char-forming agent, which is applied in the field of colored flame-retardant char-forming agents, can solve problems such as threats to life and property, and achieve the effects of less investment in equipment, simple preparation methods, and reduced dosage
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Embodiment 1
[0024] Example 1 In a 250ml three-necked flask equipped with a stirrer, a thermometer and a high-efficiency reflux condenser, 80ml of dioxane solvent was added, 2.46g (0.01mol) of tetrachloro-p-benzoquinone was added, and 8.08g of PEPA sodium salt ( 0.04mol), heat up to 100℃ and keep for 6h, suction and filter to remove sodium chloride, the filtrate is cooled and crystallized, filtered, and dried to obtain reddish brown powder colored flame retardant char-forming agent tetra-PEPA oxy-p-benzoquinone, the yield is 85.1%, initial decomposition temperature: 350±5°C.
Embodiment 2
[0025] Example 2 In a 250ml three-necked flask equipped with a stirrer, a thermometer and a high-efficiency reflux condenser, 70ml of dioxane solvent was added, 2.46g (0.01mol) of tetrachloro-p-benzoquinone was added, and 8.48g of PEPA sodium salt ( 0.042mol), heat up to 100°C and keep for 6h, suction filter to remove sodium chloride, the filtrate is cooled and crystallized, filtered, and dried to obtain reddish brown powder colored flame retardant char-forming agent tetra-PEPA oxy-p-benzoquinone, the yield is 87.9%, initial decomposition temperature: 350±5°C.
Embodiment 3
[0026] Example 3 In a 250ml three-necked flask equipped with a stirrer, a thermometer and a high-efficiency reflux condenser, 70ml of ethylene glycol diethyl ether solvent was added, 2.46g (0.01mol) of tetrachloro-p-benzoquinone was added, and 8.89g of PEPA sodium salt was added (0.044mol), heat up to 120°C for 7h to keep the temperature, suction filter to remove sodium chloride, the filtrate is cooled and crystallized, filtered and dried to obtain reddish brown powder colored flame-retardant char-forming agent tetra-PEPA oxy-p-benzoquinone, yield It is 89.2%, initial decomposition temperature: 350±5°C.
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