| 摘要 |
The compsns. used to prevent oxidative and thermal segregation of e.g. polyolefins comprises a mixture of (a) a cpd. of formula (I) and (b) a cpd. of formula (II) I; R' and R'' are R''' and R'''' and X is Y wherein R' and R''' are, independently, methyl, isopropyle, sec. or tert. butyl groups; and R'' and R'''' are, independently, isopropyl sec. or tert. butyl groups; X and Y are dissimilar 3-18C alkylene grps. which have two non-geminal bonds. Claimed mixts. are liquid or readily sol. in org. solvents so that they can be used in form of highly conc. solns. and may be pumped, dosed-in and charged to suitable equipment. |
