Use of tetrahydrobenzoxazines as stabilisers
AssigneeBASF SE
InventorsArno Lange, Helmut Mach, Hans Peter Rath, Dietmar Posselt
Life of this patent
Estimating the term…
Abstract
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.
Claims17
An additive composition comprising:
- i) a tetrahydrobenzoxazine of formula I:
- wherein R1 is a 2-aminoethyl-, a N-(2′-aminoethyl-)-2-aminoethyl-, a N′-(2″-aminoethyl-)—N-(2′-aminoethyl-)-2-aminoethyl-, a N″-(2′″-aminoethyl-)—N-(2″-aminoethyl-)—N-(2′-aminoethyl-)-2-aminoethyl-, or a 3-dimethylaminopropyl-radical,
- and
- R2, R3, R4 and R5 are each independently a hydrogen atom, a hydroxyl group or a hydrocarhyl radical having from 1 to 3000 carbon atoms which may optionally be interrupted by one or more selected from the group consisting of O, S and NR6 moieties,
- wherein R4 may optionally be a radical of formula
- wherein R1, R2, R3 and 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 wherein R4 may optionally be a radical of the 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,
- and wherein R2 and R3 or R3 and R4 or R4 and R5, together with the part-structure —O—CH2NR7—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—CH2NR7—CH2— and —O—CH2NR8—CH2— attached to the benzene ring, may optionally form a second and a third tetrahydrooxazine ring,
- wherein R7 and R8 are each independently a hydrocarbyl radical having from 1 to 3000 carbon atoms and are interrupted by one or more heteroatoms selected from the group consisting of O, S and NR6 moieties, with the provisio that at least one of R2, R3, R4, or R5 is a polyisohutenyl radical having a number-average molecular weight Mn of from 200 to 40,000;
- and
- ii) at least one compound selected from the group consisting of
- (A) compounds which derive from succinic anhydride and have long-chain hydro-carbon radicals having generally from 15 to 700 carbon atoms,
- (B) polyalkenylthiophosphonate esters, and
- (C) Mannich adducts.
Dependencies are inferred from the claim text.