Use of tetrahydrobenzoxazines as stabilisers

摘要

The use of tetrahydrobenzoxazines I;
where R1 is a hydrocarbyl radical and R2, R3, R4 and R5 are each independently hydrogen atoms, hydroxyl groups or hydrocarbyl radicals, and where R2 to R5 may also form a second and a third tetrahydrooxazine ring, with the proviso that at least one of the substituents has from 4 to 3000 carbon atoms and the remaining substituents, when they are hydrocarbyl radicals, each have from 1 to 20 carbon atoms, as stabilizers for stabilizing inanimate organic material, especially turbine fuels, against the action of light, oxygen and heat.

主权项

1. A tetrahydrobenzoxazine of formula Ia wherein R1 is a hydrocarbyl radical having from 25 to 3000 carbon atoms and may be interrupted by one or more heteroatoms from the group of 0 and S and/or by one or more NR6 moieties, R6 is a hydrogen atom or a C1- to C4-alkyl group, and the substituents R2, R3, R4 and R5 are each independently hydrogen or hydrocarbyl radicals having from 1 to 3000 carbon atoms and may be interrupted by one or more heteroatoms from the group of O and S and/or by one or more NR6 moieties, R4 may optionally be a radical of formula Y wherein R1, R2, R3 and R5 are each as defined above and X is a hydrocarbon bridging element which consists of one or more isobutene units or comprises one or more isobutene units, or where the substituent R4 may optionally be a radical of formula Z or Z′ wherein R1, R2, R3 and R5 are each as defined above and R10 and R11 are each independently hydrogen or a C1- to Cm-alkyl radical, R2 and R3 or R3 and R4 or R4 and R5, together with the part-structure —O—CH2—NR7—CH2— attached to the benzene ring, may optionally form a second tetrahydrooxazine ring, or R2 and R3 and R4 and R5, together with the part-structures —O—CH2—NR7—CH2— and —O—CH2—NR8—CH2— attached to the benzene ring, may also form a second and a third tetrahydrooxazine ring, where R7 and R8 are each independently a hydrocarbyl radical having from 1 to 3000 carbon atoms and may be interrupted by one or more heteroatoms from the group of 0 and S and/or by one or more NR6 moieties.