| 摘要 |
Compounds of the formula (I) <CHEM> in which A1 is e.g. -O- or >N-R1 where R1 is e.g. hydrogen, methyl, 2,2,6,6-tetramethyl-4-piperidyl or 1,2,2,6,6-pentamethyl-4-piperidyl, A2 is e.g. a direct bond or -CH2-, X1 and X3 which can be identical or different are e.g. a group of the formula (IIIa) or (IIIb) <CHEM> in which A3 and A4 which can be identical or different are e.g. an >N-R1 group where R1 is as defined above, R3 is e.g. -(CH2)2-6- or -(CH2)3-O-(CH2)2-4-O-(CH2)3- and R4 is e.g. hydrogen or methyl, X2 is e.g. 2-hydroxytrimethylene or a group of the formula (IVa) <CHEM> where R8 is e.g. a group of the formula (V) <CHEM> m is e.g. zero or 1, n is e.g. a number from 1 to 10, Y1 is e.g. OH, ONa,OK, a group R8 or a group -X1Z or -X3Z with Z being e.g. hydrogen or methyl and Y2 is e.g. hydrogen, methyl or a group <CHEM> with the provisos that (1) X1 or X2 or X3 contains a group of the formula (II), <CHEM> with R2 being e.g. hydrogen or methyl, that (2) each of the groups A1, A2, X1, X2, X3 and m has the same or a different definition in the individual recurring structural units of the formula (I) and that (3) the only definition of Y1 is the group -X1Z, when m is zero and n is 1.
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