Oligomeric HALS-phosphites and HALS-phosphonites as stabilizers

摘要

Oligomeric cpds. of formula (I) are claimed, where L is -O-R2-O- or -NR4-X-R3-O-; R1 is a 1-25C alkyl, 2-25C alkyl with in-chain O, S or NR5, 2-24C alkenyl, 5-15C cycloalk(en)yl (opt. substd. with 1-4C alkyl), 7-9C phenylalkyl (opt. ring-substd. with 1-4C alkyl) tetrahydroabietyl, etc.; R2 is e.g. -R3-N(Y)-R3-;Y is a gp. of formula (iii); R3 is a 1-18C alkylene, 2-18C alkylene with in-chain O, S or NR5, 4-8C alkenylene or phenylethylene; R4 is a 1-8C alkyl or gp. of formula (iii); R5 is H or 1-8C alkyl; R10 is H, 1-8C alkyl, O, OH, NO, CH2CN, 1-18C alkoxy, 5-12C cycloalkoxy, 3-6C alkenyl, or alkynyl, 1-8C acyl or 7-9C phenylalkyl (opt. ring substd. with 1-4C alkyl); m = 0 or 1; and n = 2-25. Also claimed are (a) a process for the prodn. of (I) by reacting cpds. of formula R1-(O)m-PCl2, (XXII) with cpds. of formula H-L-H (XXIII); (b) oligomeric cpds. obtd. by the process; (c) compsns. (A) contg. (1) organic material which is subject to oxidative, thermal or light induced degradation, and (2) cpd(s). (I) or the oligomeric prod(s).; and (d) a process for stabilising organic materials, against degradation as above, by mixing or coating the material with (I).