106990-43-6Relevant articles and documents
Preparation method of hindered amine light stabilizer 119
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Paragraph 0036; 0047-0051; 0062-0066; 0077-0081; 0092-0095, (2021/08/28)
The invention provides a preparation method of a hindered amine light stabilizer 119, and particularly relates to the field of chemical processes. The preparation method comprises the following steps: preparation of an intermediate (I): adding a reactant, namely cyanuric chloride and a reaction solvent, then adding N-n-butyl-N-2,2,6,6-tetramethyl piperidylamine, then adding alkali, continuing reacting for 12 hours, and splitting phases after the reaction is finished so as to finally obtain the intermediate (I); preparation of an intermediate II: adding a catalyst Pd/C, a reaction solvent, and reactants, namely paraformaldehyde and the intermediate I in a molar ratio of 1: (2.1-2.9), then introducing hydrogen with a pressure of 0.5-2 MPa, and performing reacting for 6-9 hours at a temperature of 40-90 DEG C so as to finally obtain the intermediate II; and preparation of a target product, namely a compond (III): firstly, adding a reaction solvent, reactants consisting of the intermediate II and N,N'-bis(3-aminopropyl)ethylenediamine in a molar ratio of (4.1-4.9): 1 and alkali into a reaction container, then replacing air in a reaction system with nitrogen, and carrying out a reflux reaction at 90-120 DEG C for 5-8 hours so as to obtain the target product, namely the compound (III) after the reaction is finished. The preparation method has the advantages of simplicity, high preparation efficiency, high yield, small pollution and the like.
Preparation method of hindered amine light stabilizer
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Paragraph 0048-0056, (2020/04/06)
The invention relates to a preparation method of a hindered amine light stabilizer. The method comprises the following steps: reacting cyanuric chloride with N,N'-bis(3-aminopropyl)ethylenediamine toobtain an intermediate I; reacting the intermediate I with N-butyl-2,2,6,6-tetramethyl-4-piperidylamine to obtain an intermediate II; and adding paraformaldehyde or formaldehyde and formic acid, and carrying out a methylation reaction to obtain the target product. The method adopting the above new synthetic route has the advantages of avoiding of high-temperature or high-pressure reaction conditions in preparation, improvement of the density of hindered amine functional groups of the product, high purity, avoiding of the step of possibly generating hydrolysis byproducts, and great reduction ofthe industrial production cost of the product.