Block oligomers containing 1-hydrocarbyloxy-2,2,6,6-tetramethyl-4-piperidyl groups as stabilizers for organic materials
                        
                            
                                申请人:Ciba Specialty Chemicals Corp.
                            
                            
                                公开号:US06265473B1
                            
                            
                                公开(公告)日:2001-07-24
                            
                            Compounds of formula (I), in which the polydispersity Mw/Mn is for example 1; n is 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14 the radicals R1 are for example C1-C18alkyl or C5-C12cycloalkyl; R2 is for example C-Cl2alkylene; the radicals A and B* are independently of one another —OR3, —N(R4)(R5) or a group of formula (II); R3, R4 and R5, which are identical or different, are for example hydrogen or C1-C18alkyl, or —N(R4)(R5) is additionally a group of formula (III) with Y being —0—, —CH2—, —CH2, —CH2— or >N—CH3; X is —0— or >N—R6; R6 is for example hydrogen or C1-C18alkyl; R is preferably a group of formula (IV); and B has one of the meanings given for A; with the proviso that in the individual recurrent units of formula (I), each of the radicals B, R, R1 and R2 has the same or a different meaning. The indicated compounds are useful as light stabilizers, heat stabilizers and oxidation stabilizers for organic materials, in particular synthetic polymers.
                            公式(I)的化合物,其中聚分散度Mw/Mn例如为1;n为2、3、4、5、6、7、8、9、10、11、12、13或14,基团R1例如为C1-C18烷基或C5-C12环烷基;R2例如为C-Cl2烷基;基团A和B*彼此独立,为—OR3、—N(R4)(R5)或公式(II)的基团;R3、R4和R5,相同或不同,例如为氢或C1-C18烷基,或—N(R4)(R5)另外可以是公式(III)的基团,其中Y为—O—、—
CH2—、—   、—   —或>N—
CH3;X为—O—或>N—R6;R6例如为氢或C1-C18烷基;R最好为公式(IV)的基团;B具有A所给定的含义之一;但规定在公式(I)的各个重复单元中,每个基团B、R、R1和R2具有相同或不同的含义。所述化合物可作为有机材料的
光稳定剂、热稳定剂和氧化稳定剂,特别是合成聚合物。