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Formamide and cupric sulfate were involved in the preparation of intermediate for printing layer of NANOMET ROOF SHEET

Published date: 2023/5/21

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The intermediate of NANOMET ROOF SHEET printing layer, 1,2,2,6, 6-pentamethylpiperidol,n, n-dimethylformamide and copper sulfate were mixed evenly. After the reaction for 8h, the filter slag was removed and the filtrate was distilled to remove the solvent at the rotational speed of 150r/min and temperature of 140℃. The substrate, potassium carbonate, deionized water and tetraethyl ammonium bromide were added to the reactor, and the reflux reaction was carried out for 2h to prepare the intermediate. The 4-methyl-2-nitroaniline, concentrated hydrochloric acid and deionized water were mixed evenly.

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Under the condition of 150r/min and 0℃, after stirring for 0.5h, sodium nitrite aqueous solution was added for 0.5h, and the ph value of the reaction solution was adjusted to 8 to prepare diazo solution. After evenly mixing p-methylphenol, potassium carbonate, dimethyl sulfate and acetone, the NANOMET ROOF SHEET printing layer intermediate was prepared by stirring reflux for 3h under the condition of 150r/min and 90℃.

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The intermediate, potassium permanganate and deionized water were mixed evenly, the temperature was 110℃, the reflux reaction for 4h, the NANOMET ROOF SHEET printing layer intermediate and dichlorosulphone were mixed evenly, the rotation speed was 150r/min, the temperature was 80℃, after the reflux reaction for 8h, After removing dichlorosulphoxide by distillation, adding diazo liquid, the reaction was carried out for 1h under the conditions of 200r/min, 5℃ and 8 ph value of reaction liquid, and then the intermediate was prepared.


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