187393-00-6Relevant articles and documents
Preparation method of high-purity bis-ethyl hexyloxyphenol methoxyphenyl triazine
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Paragraph 0041-0069, (2021/09/26)
The invention particularly discloses a preparation method of high-purity bis-ethyl hexyloxyphenol methoxyphenyl triazine. The preparation method comprises the following steps: S1, adding 2, 4-dichloro-6-(4-methoxyphenyl)-1, 3, 5-triazine and 3-ethylhexyloxyphenol into a reaction container, performing mixing, then adding an organic solvent and a catalyst, and fully reacting to obtain a reaction liquid; and S2, adding water to quench the reaction liquid in the step S1, and carrying outoil phase water washing, desolvation, recrystallization, filtration and drying to obtain the high-purity bis-ethyl hexyloxyphenol methoxyphenyl triazine. As the number of alkyl groups in the 3-ethylhexyloxyphenol is fixed, the production of monoalkylated products and trialkylated products can be greatly reduced, and target products with higher purity can be obtained; in addition, the catalyst is added into a reaction system in batches, so that the advantages of controlling reaction heat release and enabling raw materials to react completely are achieved; and after the organic solvent is added, gradient heating is carried out, so that the reaction is milder, and the purpose of reducing side reactions is achieved.
Etherification synthesis method of ultraviolet light absorberTinosorb S
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Paragraph 0032; 0037-0044; 0049-0051; 0056-0058; 0063; ..., (2021/07/24)
The invention discloses an etherification synthesis method of an ultraviolet light absorber Tinosorb S. The etherification synthesis method comprises the following steps: taking 2, 4-bis (2, 4-dihydroxyphenyl)-6-(p-methoxyphenyl)-1, 3, 5-triazine as a raw material, carrying out boronation reaction on the 2, 4-bis (2, 4-dihydroxyphenyl)-6-(p-methoxyphenyl)-1, 3, 5-triazine and boron acetate formed by boric acid and acetic anhydride to obtain a boride of the 2, 4-bis (2, 4-dihydroxyphenyl)-6-(p-methoxyphenyl)-1, 3, 5-triazine, carrying out an etherification reaction with halogenated isooctane in an organic solvent under a weakly alkaline condition, and finally hydrolyzing with sodium hydroxide or potassium hydroxide to obtain an ultraviolet light absorber Tinosorb S product. The synthesis yield can reach 90% or above, and the product purity is 98.5% or above. The synthesis method is high in yield, low in production cost and high in product purity, and the market competitiveness of the product is greatly improved.
NOVEL PROCESS FOR THE ETHERIFICATION OF BIS-RESORCINYOL TRIAZINES
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Page/Page column 7; 8, (2016/12/07)
The invention relates to an improved process for the manufacture of bis-resorcinyl triazines of formula (I), wherein R1 is hydrogen, a C1-C18alkyl group or a C2-C18alkenyl group and R2 is a C1-C18alkyl group or a C2-C18alkenyl group. (I)