| 摘要 |
The new compounds of formula (I) <CHEM> in which R1 is e.g. hydrogen or methyl, R2 is e.g. a group -OR5 or <CHEM> in which R5 is e.g. 2,2,6,6-tetramethyl-4-piperidyl or 1,2,2,6,6-pentamethyl-4-piperidyl, R6 and R7 which are identical or different are e.g. C1-C8alkyl, tetrahydrofurfuryl, 2,2,6,6-tetramethyl-4-piperidyl or 1,2,2,6,6-pentamethyl-4-piperidyl, or R6 is also hydrogen, or the group <CHEM> is e.g. 4-morpholinyl, R3 and R4 which are identical or different are e.g. hydrogen, methyl, 2,2,6,6-tetramethyl-4-piperidyl or 1,2,2,6,6-pentamethyl-4-piperidyl, m and n are e.g. 3, and X is e.g. -O- or - @-R9 where R9 is C1-C8alkyl, tetrahydrofurfuryl, 2,2,6,6-tetramethyl-4-piperidyl or 1,2,2,6,6-pentamethyl-4-piperidyl, are effective as light stabilizers, heat stabilizers and oxidation stabilizers for organic materials, in particular synthetic polymers.
|
