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- W2364004285 abstract "Dendertic hindered amine light stabilizers with lower basicity were prepared via Michael addition and transesterification reactions with dimethyl malonate,methyl acrylate,2,2,6,6-tetramethyl-piperidine-4-ol and 1,2,2,6,6-pentamethyl-piperidine-4-ol as the main starting materials,the product yields were 89.3% and 78.0% respectively based on dimethyl malonate.The optimum conditions for Michael addition were found as 1:2.2 molar ratio of dimethyl malonate with methyl acrylate,2.2eq NaOMe as catalyst for 4 h reaction;and those for the transesterification were found as,1:4.8 molar ratio of the addition product with 2,2,6,6-tetramethyl-piperidine-4-ol or 1,2,2,6,6-pentamethyl-piperidine-4-ol,2% tetraisopropyl orthotitanate of the addition product as catalyst for 24h reaction.The pH values of the synthesized compounds were 8.7 and 6.6,respectively." @default.
- W2364004285 created "2016-06-24" @default.
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- W2364004285 date "2010-01-01" @default.
- W2364004285 modified "2023-09-25" @default.
- W2364004285 title "Synthesis of dendritic hindered amine light stabilizers with lower basicity" @default.
- W2364004285 hasPublicationYear "2010" @default.
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