wherein n, R₁-R₄, T, m, R₉-R₁₂, Y, R₁₆ -R₁₈ and B are as defined in claims 1, 8 and 12, are useful stabilizers for substrates subject to the deleterious effects of oxygen, heat and/or actinic radiation.
摘要:
Substituted hydroxylamine ester stabilizers corresponding to the formula I wherein n is an integer from 0 to 2, X is a direct bond, -S- or -CH₂S-, R₁ and R₂ independently are hydrogen, alkyl of 1 to 36 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, allyl, aryl, aralkyl of 7 to 9 carbon atoms, said aralkyl substituted by alkyl of 1 to 36 carbon atoms, or R₁ and R₂ together with the nitrogen atom to which they are linked form a 5 - 7 membered heterocyclic ring, R₃ and R₄ independently are alkyl of 1 to 18 carbon atoms, cycloalkyl of 5 to 6 carbon atoms, phenyl, alkaryl of 7 to 18 carbon atoms or aralkyl of 7 to 9 carbon atoms, and R₅ is hydrogen or the group are effective in stabilizing organic materials against oxidative, thermal and actinic degradation.
摘要:
The compounds of the formula (I) wherein R₁ and R₂ are independently alkyl of 8 to 36 carbon atoms, are useful for stabilizing a poly(arylene sulfide) resin, a modified polystyrene or a polymer containing a diene component against thermal, oxidative or actinic degradation. N,N-Dialkylhydroxylamines of the formula (I) can be prepared by an improved process involving a reverse Michael reaction of the N-oxides of the corresponding β-dialkylaminopropionic esters, amides or nitriles or of β-dialkylaminosuccinyl esters or imides. N,N-Dialkylhydroxylamines of the formula (I) can also be prepared by an improved process involving the direct oxidation of the corresponding N,N-dialkylamines with aqueous hydrogen peroxide in a lower alkanol solvent.
摘要:
Substituted hydroxylamine ester stabilizers corresponding to the formula I wherein n is an integer from 0 to 2, X is a direct bond, -S- or -CH₂S-, R₁ and R₂ independently are hydrogen, alkyl of 1 to 36 carbon atoms, cycloalkyl of 5 to 12 carbon atoms, allyl, aryl, aralkyl of 7 to 9 carbon atoms, said aralkyl substituted by alkyl of 1 to 36 carbon atoms, or R₁ and R₂ together with the nitrogen atom to which they are linked form a 5 - 7 membered heterocyclic ring, R₃ and R₄ independently are alkyl of 1 to 18 carbon atoms, cycloalkyl of 5 to 6 carbon atoms, phenyl, alkaryl of 7 to 18 carbon atoms or aralkyl of 7 to 9 carbon atoms, and R₅ is hydrogen or the group are effective in stabilizing organic materials against oxidative, thermal and actinic degradation.
摘要:
Verbindungen der Formel worin R 1 Wasserstoff oder C 1 -C 3 -Alkyl bedeutet, R 2 und R 3 unabhängig voneinander Wasserstoff, C 1 -C 36 -Alkyl, C 5 -C 12- Cycloalkyl, C 7 C 9 -Aralkyl oder durch C 1 -C 36 -Alkyl substituiertes C 7 -C 9 -Aralkyl sind, X eine direkte Bindung oder Phenylen ist, n eine ganze Zahl von 1 bis 3 bedeutet und wenn n 1 ist, A Wasserstoff, C 1 -C 30 -Alkyl, Aryl, C 5 -C 8 -Cycloalkyl, C 7 -C 9 -Aralkyl, durch C 1 -C 30 -Alkyl substituiertes C 7 -C 9 -Aralkyl oder 2,5-Dioxo-1H-pyrrol-1-yl ist, wenn n 2 bedeutet, A C 1 -C 12 -Alkylen, Phenylen, C 6 -C 10 -Cycloalkylen oder Alkylen-Arylen-Alkylen mit 8 bis 10 Kohlenstoffatomen ist und wenn n 3 bedeutet, A Alkantriyl mit 3 bis 6 Kohlenstoffatomen oder ist, eignen sich zum Stabilisieren von organischem Material.