| abstract |
A product obtainable by 1) reacting a compound of formula (α) with a compound of formula (β) in a molar ratio of 1.2:1 to 1.4:1; 2) reacting the end groups of formula (η) being present in the product of the reaction 1) with e.g. dibutylamine in a molar ratio of 2:1.7 to 2:3; the reactions 1) and 2) being carried out in an organic solvent in the presence of an inorganic base; and 3) transferring the groups of formula (G-I) being present in the product of the reaction 2) to groups of formula (G-II), said transfer being carried out by reacting the product of the reaction 2) with a hydroperoxide in a hydrocarbon solvent in the presence of a peroxide decomposing catalyst; R1 is in particular a hydrocarbyl radical, B is e.g. N-(2,2,6,6-tetramethyl-4-piperidyl)-butylamino, R is e.g. 2,2,6,6-tetramethyl-4-piperidyl and R2 is e.g. hexamethylene. The products obtained are useful as light stabilizers, heat stabilizers and oxidation stabilizers for organic materials in particular synthetic polymers such as polyolefins. |