Tricresyl phosphate-free oil, lubricant or turbine oil

Patent metadata

Field	Value
Publication number	US-9657253-B2
Application number	US-201414767826-A
Country	US
Kind code	B2
Filing date	Jan 31, 2014
Priority date	Feb 27, 2013
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

The present invention relates to a tricresyl phosphate-free oil which can be used as lubricant or hydraulic oil. The oil is distinguished by extremely low human toxicity. In particular, the oil is suitable as turbine oil, i.e. as lubricant oil in aircraft turbines, with which, in the case of a fume event, symptoms of the aerotoxic syndrome in aircraft passengers can be prevented. In addition, the present invention relates to the corresponding use of the turbine oil according to the invention for the prophylaxis of the aerotoxic syndrome in the case of a fume event. In addition, the invention describes a turbine which contains a corresponding turbine oil as lubricant. Furthermore, the method for operating a turbine is indicated.

First claim

The invention claimed is:

1. A tricresyl phosphate-free oil composition, comprising
a) at least one basic oil,
b) at least one alkyl polyglycoside, and
c) at least one phenol derivative of general formula I

wherein
R 1 upon each occurrence, is selected, independently of each other, from the group consisting of linear or branched alkyl radicals with 1 to 18 carbon atoms and
R 2 upon each occurrence, is selected, independently of each other, from the group consisting of hydrogen or linear or branched alkyl radicals with 1 to 18 carbon atoms.

2. The tricresyl phosphate-free oil composition according to claim 1 , which is free of organic phosphoric acid esters, organic phosphonic acid esters, organic phosphinic acid esters, and/or organic phosphane oxides and/or naphthyl amines.

3. The tricresyl phosphate-free oil composition according to claim 1 , wherein the general compound of formula I is selected from the group consisting of 3,5-di-tert.-butyl-hydroxytoluene (BHT), 2,4-dimethyl-6-tert-butyl phenol, 2,6-di-tert-butyl phenol and mixtures or combinations thereof.

4. The tricresyl phosphate-free oil composition according to claim 1 , wherein the compound of formula I is contained in a quantity of 0.01 to 10% by weight relative to the total oil.

5. The tricresyl phosphate-free oil composition according to claim 1 , wherein the basic oil is selected from the group consisting of polyol esters, carboxylic acid esters, and natural oils.

6. The tricresyl phosphate-free oil composition according to claim 1 , wherein the basic oil is contained in a quantity of 99.799 to 30% by weight relative to the total oil.

7. The tricresyl phosphate-free oil composition according to claim 1 , wherein further nanosilver particles are contained, in a quantity of 0.01 to 50 ppm and/or the average particle size of the nanosilver particles is 1 to 100 nm.

8. The tricresyl phosphate-free oil composition according to claim 1 , wherein further additives selected from the group consisting of polyisobutylenes, fatty acids, or combinations thereof, are contained in a quantity of 0.1 to 30% by weight relative to the total oil.

9. The tricresyl phosphate-free oil composition according to claim 1 , having the following composition:
a) 99.799 to 30% by weight of at least one basic oil,
b) 0.01 to 10% by weight of at least one phenol derivative of general formula I,
c) 0.1% to 30% by weight of at least one alkyl polyglycoside and
d) 0.1 to 30% by weight, of at least one further additive, selected from the group consisting of polyisobutylenes, fatty acids, stearic acid and/or combinations thereof,
the quantities of components a) to d) being chosen such that 100% by weight results.

10. The tricresyl phosphate-free oil composition according to claim 9 , wherein the weight ratio of alkyl polyglycosides:polyisobutylenes:fatty acids is of 25:40:35 to 75:50:5.

11. The tricresyl phosphate-free oil composition according to claim 1 , in the form of a turbine oil.

12. A method for lubricating aircraft turbines for the prophylaxis of the aerotoxic syndrome in the case of a fume event comprising utilizing the tricresyl phosphate-free oil composition of claim 1 .

13. The method according to claim 12 , wherein the aerotoxic syndrome comprises at least one or more of the following symptoms: blurred vision or tunnel vision, shaking and trembling states, equilibrium disorders, cramp attacks, loss of consciousness, memory impairment, headaches, tinnitus, dazed state, dizziness, confusion, cognitive difficulties, poisoned feelings, sickness, nausea, diarrhea, eye irritations, vomiting, coughing, breathing difficulties (shortness of breath), pressure on chest, failure of respiratory tract, increase in heart frequency and heartbeat and/or and irritation of eyes, nose and upper respiratory tract.

14. A turbine, containing an oil composition according to claim 1 as lubricant or lubricating oil.

15. A method for operating a turbine comprising utilizing an oil composition according to claim 1 as lubricant or lubricating oil.

16. The tricresyl phosphate-free oil composition according to claim 4 , wherein the compound of formula I is contained in a quantity of 0.1 to 7.5% by weight relative to the total oil.

17. The tricresyl phosphate-free oil composition according to claim 5 , wherein the basic oil is selected from the group consisting of trimethylolpropane trinonanoate, decanoic acid methyl ester, and rapeseed oil.

18. The tricresyl phosphate-free oil composition according to claim 6 , wherein the basic oil is contained in a quantity of 88.9 to 40% by weight relative to the total oil.

19. The tricresyl phosphate-free oil composition according to claim 7 , wherein the further nanosilver particles are contained in a quantity of 0.1 to 10 ppm and/or the average particle size of the nanosilver particles is 5 to 15 nm.

Assignees

• Fraunhofer Ges Forschung

Inventors

• Schmid Helmut
• Eckl Wilhelm
• Moriske Heinz-Jörn

Classifications

• C10M2209/12

  Polysaccharides, e.g. cellulose, biopolymers · CPC title

• C10M2209/123

  used as base material · CPC title

• C10M2207/2815

  used as base material · CPC title

• C10M169/04 Primary

  Mixtures of base-materials and additives · CPC title

• C10N2030/42

  Phosphor free or low phosphor content compositions · CPC title