| 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 method to stabilize an organic material to degradation by light, oxygen and heat, comprising:
adding a tetrahydrobenzoxazine of formula I to the organic material: wherein R1 represents is a hydrocarbyl radical having from 1 to 3000 carbon atoms optionally substituted with one or more moieties selected from the group consisting of O, S and NR6, R6 is a hydrogen atom or a C1- to C4-alkyl radical, and R2, R3, R4 and R5 are each independently a hydrogen atom, a hydroxyl group or a hydrocarbyl group having from 1 to 3000 carbon atoms optionally substituted with one or more moieties selected from the group consisting of O, S and NR6, 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 R4 may also 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 C10-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, optionally form a second tetrahydrooxazine ring, or the substituents 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, optionally form a second and a third tetrahydrooxazine ring, and R7 and R8 are each independently a hydrocarbyl group having from 1 to 3000 carbon atoms optionally substituted with one or more moieties selected from the group consisting of O, S and NR6, with the proviso that at least one of the substituents R1, R2, R3, R4, R5, R7 or R8 has from 4 to 3000 carbon atoms and the remaining substituents from the group of R1, R2, R3, R4, R5, R7 and R8, when they are hydrocarbyl radicals, each have from 1 to 20 carbon atoms. |
