abstract |
3,7,9-Trioxa-1-aza-2,8-diphosphaspiro[4.5]decanes of formula I <IMAGE> (I) wherein R1 and R2 are independently hydrogen, alkyl, cycloalkyl, bicycloalkyl, tricycloalkyl or aryl; or can be halogen when n or m is zero, R3, R4, R5 and R6 are independently hydrogen, alkyl, aralkyl or aryl; X and Y are independently -O-, -S- or -NR16- where R16 is alkyl, cycloalkyl, alkenyl, aryl or aralkyl; W and Z are independently O or S; and n, m, o and p are independently zero or 1, are effective in stabilizing organic materials against the deleterious effects of oxygen, heat and/or actinic radiation. |