WO2012159738A1

WO2012159738A1 - High temperature oil

Info

Publication number: WO2012159738A1
Application number: PCT/EP2012/002172
Authority: WO
Inventors: Thomas Kilthau; Karl EGERSDÖRFER; Martin Schmidt-Amelunxen
Original assignee: Klüber Lubrication München Se & Co. Kg
Priority date: 2011-05-26
Filing date: 2012-05-22
Publication date: 2012-11-29
Also published as: DE102011102540B4; MY164068A; US20140200169A1; AU2012261221B2; ES2601401T3; CN103764808A; BR112013030286B1; LT2714872T; PL2714872T3; KR20140009499A; JP2014515412A; HUE029149T2; EP2714872A1; EA026445B1; BR112013030286A2; EA201301331A1; JP5752321B2; CL2013003397A1; SI2714872T1; AU2012261221A1

Abstract

The invention relates to novel high temperature oils based on aromatic esters, such as trimellitic acid esters, pryomellitic acid esters, trimesic acid esters or a mixture thereof or derivatives of phloroglucinol and a fully hydrated or a hydrated polyisobutylene or a mixture thereof.

Description

High temperature oil

description

The invention relates to novel high-temperature oils based on aromatic esters, such as trimellitic esters, pyromellitic esters, trimesic acid esters or a mixture or derivatives of phloroglucin, such as Phloroglucentr trioctylsäureester, Phloroglucin tridecylsäureester and Phloroglucin- tridodecylsäureester thereof and a fully hydrogenated or a hydrogenated polyisobutylene or a mixture thereof ,

High temperature oils used in industrial chain lubrication, e.g. in conveyor systems, paint lines, textile industry, insulation industry, glass industry, etc., and belt lubrication are used in continuous Holzpreßanlagen, usually consist of a three-component system.

This three-component system usually consists of an aromatic ester, a synthetic hydrocarbon and a polymer based on polyisobutylene. The synthetic hydrocarbon is used as a solubilizer. In addition, commercial additives are added to this lubrication system. A disadvantage of these systems, however, is that by the use of the synthetic hydrocarbon the Working temperature of the oil is limited because it evaporates very quickly at temperatures> 200 ° C.

A three-component system is described for example in EP 1 154 011 B1. Here, there is provided a lubricating oil composition containing an aromatic ester compound and, as another base oil, an α-olefin oligomer and a polyisobutene.

As already stated above, the loss of performance of a three-component lubricant composition due to the evaporation of the solubilizer is high. The evaporation forms a deposit or residue on the application surface or application area from the remaining constituents of the lubricant, whereby complete lubrication can no longer be guaranteed. This deposit must now be released again. In general, the operation must be discontinued and the residue to be replaced. There is therefore a need for a high-temperature oil, in which the evaporation of individual components of the oil is greatly reduced and so at constant high temperature over a long period of time, the lubricating effect is not lost.

Such a high-temperature oil is particularly required for the chain and belt lubrication of wood presses, as they are present for example in Contipressen ™ for the production of laminate flooring. The object of the present invention was to provide a high-temperature oil, with which a good lubricating effect is achieved at a constant high temperature over a long period of time and which can be provided in different viscosities depending on the application. This object is achieved, surprisingly, by the provision of a high-temperature oil which, as a two-component system, comprises an aromatic ester of the general formula (I)

wherein R 1 is a linear or branched alkyl group having 6 to 16 carbon atoms and n is 3 or 4 or a compound of the general formula (II)

wherein R is a linear or branched alkyl group having a chain length of 8 to 16 carbon atoms and n is 3

and

a hydrogenated polyisobutylene, a fully hydrogenated polyisobutylene or a mixture of a fully hydrogenated and a hydrogenated polyisobutylene. Preferably, a fully hydrogenated polyisobutylene

includes.

Generally, the high temperature oil comprises from 40 to 91, 9% by weight of the aromatic ester of general formula (I) or the compound of general formula (II) and from 50 to 5% by weight of hydrogenated, fully hydrogenated polyisobutylene or a mixture of hydrogenated and fully hydrogenated polyisobutylene.

Furthermore, the high-temperature oil may comprise from 0.1 to 6% by weight, in particular from 2 to 5% by weight, of an antioxidant. In addition, the high-temperature oil 0 to 4 wt .-%, in particular 0.3 to 3.5 wt .-% of a wear protection agent, 0.1 to 1, 0 wt .-% of a corrosion inhibitor and 0 to 2 wt .-%, in particular 0.1 to 1, 5% by weight of an ionic liquid.

The ester compound of the formula (I) present in the high-temperature oil is preferably selected from the group consisting of esters of trimellitic acid, pyromellitic acid, trimesic acid or mixtures thereof. The compound of the general formula (II) is a derivative of phloroglucinol (benzene-1,3,5-triol), preferably phloroglucinotrioctylic acid ester, phloroglucin tridecylic acid ester and phloroglucinetridodecylic acid ester.

The antioxidant present in the high temperature oil, which may contain sulfur and / or nitrogen and / or phosphorus in the molecule, is selected from the group consisting of aromatic amine antioxidants, such as alkylated phenyl-alpha-naphthylamine, dialkyldiphenylamine, hindered phenols, such as butylhydroxytoluene ( BHT), phenolic antioxidants with thioether groups, Zn or Mo or W dialkyldithiophosphates and phosphites.

The anti-wear agent present in the high-temperature oil is selected from the group consisting of diphenyl cresyl phosphate-based anti-wear additives, amine-neutralized phosphates, alkylated and non-alkylated triaryl phosphates, alkylated and non-alkylated triaryl thiophosphates, zinc or Mo or dialkyldithiophosphates, carbamates, thiocarbamates , Zinc or Mo or W dithiocarbamates, dimercapto thiadiazole, calcium sulfonates and benzothazole derivatives.

The corrosion inhibitor present in the high-temperature oil is selected from the group consisting of additives based on overbased Ca sulfonates having a TBN of 100 to 300 mg KOH / g, amine-neutralized phosphates, alkylated Ca naphthalenesulfonates, oxazoline derivatives, imidazole Derivatives, succinic acid half esters, N-alkylated benzotriazoles. The ionic liquid (IL) used in the high-temperature oil is so-called molten salt, which by definition is liquid at temperatures below 100 ° C. Many ionic liquids are also liquid at room temperature or at lower temperatures. Suitable cations for ionic liquids have been found to be a quaternary ammonium cation, a phosphonium cation, an imidazolium cation, a pyridinium cation, a pyrazolium cation, an oxazolium cation, a pyrrolidinium cation, a guanidinium cation, a morpholinium cation or a triazolium cation selected from the group consisting of [PF ₆ r, [BF ₄ V, [CF ₃ CO ₂ ] ^" , [CF ₃ SO ₃ ] ^" , [(CF ₃ SO ₂ ) ₂ N] ^' , [(R ⁴ S0 ₂ ) (R ⁵ S0 ₂ ) N] - , [(CF ₃ SO ₂ ) (CF ₃ COO) N] \ [R -SO ₃ ] ^" , [R ⁴ -O-S0 ₃ ] ^" , [R-COO] -, Cl \ Bf, [NO ₃ ] -, [N (CN) ₂ ] ^" , [HSO ₄ ] ^" , or [RR ⁵ PO ₄ ] ^" , and the radicals R ⁴ and R ^{5 are} independently selected from hydrogen; linear or branched, saturated or unsaturated, aliphatic or alicyclic alkyl groups having 1 to 20 carbon atoms; heteroaryl, heteroaryl-Ci-C ₆ - alkyl groups having 3 to 8 carbon atoms in the heteroaryl radical and at least one heteroatom selected from N, O and S, provided with at least e in which group selected from C can be substituted Ce-alkyl groups and / or halogen atoms; Aryl-Aryl-CrC ₆ alkyl groups having 5 to 12 carbon atoms in the aryl radical, which may be substituted by at least one C C6 alkyl group, can be combined, partially and fully fluorinated alkyl radicals However, other combinations are possible. Anions of the type [PF _(6- x) R ⁷ x] ^' , [R ⁷ -SO ₃ ] ^" are also known, R ⁷ represent here or completely fluorinated radicals such as pentafluoroethyl or perfluorobutyl. The following anionic type is also quite stable thermally : (FS0 ₂ ) ₂ N \

In order to develop a positive effect in oils, the ionic liquids should firstly show a solubility in the oils, but complete miscibility is not absolutely necessary. The ionic liquids should be thermally stable and not promote corrosion, for example by not forming corrosive reaction products in the presence of water or only with a very long delay. Ionic liquids such as tetraalkylammonium and tetraalkylphosphonium bis (trifluoromethylsulfonyl) imides such as, for example, trihexyl (tetradecyl) phosphonium bis (trifluoromethylsulfonyl) imide (HPDimide) and methyltrioctylammonium bis (trifluoromethylsulfonyl) imide have proved to be particularly advantageous (moimide). Also particularly advantageous are ionic liquids such as tetraalkylammonium and tetraalkylphosphonium tris (perfluoroethyl) trifluorophosphate such as tetrabutylphosphonium tris (perfluoroethyl) trifluorophosphate (BuPPFET), trihexyl (tetradecyl) tris (perfluoroethyl) trifluorophosphate (HDPPFET). Also particularly advantageous pyrrolidium tris (perfluoroethyl) trifluorophosphates have shown. Also particularly advantageous are tetraalkylammonium and tetraalkylphosphonium perfluorobutanesulfonates such as trihexyl (tetradecyl) phosphonium perfluorobutanesulfonate (HDPnonaflat).

It is also possible to use any desired mixtures of the ionic liquids.

The two-component system according to the invention has a significantly higher performance in terms of thermal stability and residue formation or residue behavior. The enormous increase in thermal stability is particularly noticeable in a significant increase in the lubricating behavior. The relubrication intervals could be extended and an energy saving of up to 30% electricity savings could be achieved.

As already mentioned, the formation of residues is significantly reduced. This also reduces the formation of Verkrackungsrückständen and the residues formed can be easily dissolved with fresh oil.

The attached figures show the advantages of the high temperature oil based on two components according to the invention. shows the friction values in dependence on the temperature and a load of 250 N of a high temperature oil of the invention on two-component base of Example 1 compared to a known oil on three-component basis of Comparative Example 1 at a kinematic viscosity at 40 ° C of about 260 mm ² / sec;

shows the evaporation losses of a two-component-based high-temperature oil according to the invention of Example 1 compared to a known three-component oil of Comparative Example 1 with a kinematic base oil viscosity at 40 ° C of about 260 mm ² / sec;

Fig. 12 shows an increase in the apparent dynamic viscosity of a two-component-based high-temperature oil of Example 1 compared with a known three-component-based oil of Comparative Example 1 at a kinematic base oil viscosity at 40 ° C of about 260 mm ² / sec; Fig. 12 shows the friction values versus temperature and a load of 250 N of a two-component-based high-temperature oil of Example 2 of the present invention as compared with a known three-component-based oil of Comparative Example 2;

shows the evaporation losses of a two-component high-temperature oil according to the invention of Example 2 compared to a known three-component oil of Comparative Example 2 at a kinematic base oil viscosity at 40 ° C of about 100 mm ² / sec;

Fig. 10 shows an increase in apparent viscosity of a two-component-based high-temperature oil of Example 2 compared with a known three-component-based oil of Comparative Example 2 at a kinematic base oil viscosity at 40 ° C of about 100 mm ² / sec; shows the friction values as a function of the temperature and a load of 250 N of an inventive Two component high temperature high temperature oil of Example 3 compared with a known three component based oil of Comparative Example 3;

Figure 8 shows the evaporation losses of an inventive

680 mm ² / sec;

FIG. 9 shows an increase in the apparent dynamic viscosity of a two-component-based high-temperature oil of Example 3 compared with a known three-component-based oil of Comparative Example 3 at a kinematic base oil viscosity at 40 ° C. of approximately 680 mm ² / sec;

FIG. 10 shows the evaporation losses of a device according to the invention

High-temperature oil on Zweompompentenentenbasis with an ionic liquid of Example 4 compared with Comparative Example 4, which corresponds to Example 1 at a kinematic base oil viscosity of about 260 mm ² / sec.

FIG. 11 shows the increase in the apparent dynamic viscosity of a high-temperature oil according to the invention on a two-component basis with an ionic liquid of Example 4 compared with Comparative Example 4, which corresponds to Example 1, with a kinematic base oil viscosity of approximately 260 mm ² / sec.

FIG. 12 shows the experimental setup for the power chain test bench.

The invention will now be explained in more detail with reference to the following examples.

a two-component high-temperature oil according to the invention

Composition of high-temperature oil:

63.4% by weight of aromatic trimellitic acid ester

30.0 wt .-% fully hydrogenated polyisobutylene 3.5% by weight of wear protection agent

3.0% by weight of antioxidant

0.1% by weight corrosion inhibitor As the aromatic ester, trimellitic acid ester is placed in a stirred tank. At 100 ° C, the polyisobutylene is added with stirring. Subsequently, the mixture is stirred for 1 hour to obtain a homogeneous mixture. The anti-wear agents and the antioxidant are added to the kettle at 60 ° C with stirring. After about 1 hour, the finished oil can be filled into the containers provided.

Comparative Example 1

Preparation of a known three-component high-temperature oil Composition of high-temperature oil:

47.4% by weight of aromatic trimellitic acid ester

16.0% by weight of polyisobutylene

30.0% by weight of synthetic hydrocarbon

3.5% by weight of wear protection agent

3.0% by weight of antioxidant

0.1% by weight corrosion inhibitor

As an aromatic ester Trimelittsäureester is presented together with the poly-olefin as a synthetic hydrocarbon in a stirred tank. At 100 ° C, the polyisobutylene is added with stirring. Subsequently, the mixture is stirred for 1 hour to obtain a homogeneous mixture. The anti-wear agents and antioxidants are added to the kettle at 60 ° C with stirring. After about 1 hour, the finished oil can be filled into the containers provided.

The advantages of the high-temperature oil according to the invention are shown below. The basic data of the oil according to Example 1 and Comparative Example 1 are shown in Table 1.

Table 1

1.1. Thermal resistance tests Investigations were carried out with respect to evaporation and viscosity under temperature load of 5 g weight in an aluminum dish at 230 ° C. For this purpose, the oils according to Example 1 and Comparative Example 1 were compared.

Table 2

Example 1 Comparative Example 1

Evaporation loss after 16% 30%

24 h / 230 ° C

Evaporation loss after 25% 49%

48 h / 230 ° C

Evaporation loss after 35% 62%

72 h / 230 ° C

Increase in apparent dyna970 mPas 1300 mPas mix viscosity

24 h / 230 ° C

Increase in apparent dyna1400 mPas 4400 mPas mix viscosity

48 h / 230 ° C

Increase in apparent dyna3200 mPas 41000 mPas mix viscosity

72 hl 230 ° C The above results show that by using fully hydrogenated polyisobutylene in a two-component high temperature oil, the increase in viscosity and evaporation loss can be significantly reduced as compared with the known three-component oil. These results are also shown graphically in FIGS. 2 and 3.

1.2. Comparison of friction values

The oils prepared in Example 1 and Comparative Example 1 were used to determine the friction values. For this purpose, a vibration friction wear test (SRV) based on DIN 51834, test condition ball / disc, 250 N load, 50 ° C to 250 ° C, 1 mm stroke 50 Hz, 165 min was performed. The results are shown in Table 3.

Table 3

These results, which are also shown in Figure 1, show the positive effect of the high-temperature two-component oil on the coefficient of friction compared with the three-component system. 1.3. Residue behavior after complete evaporation of the oil at 250 ° C

The formation of residues and the behavior of the residues in terms of solubility were investigated.

The oil to be tested is weighed on a previously bent and solvent-cleaned steel sheet with 5 g and then evaporated at 250 ° C in a convection oven min 72h. The square sheet is bent manually on all four sides to create a shell shape.

After cooling, the results of the back weighing are documented.

Essential for this test is the determination of the solubility of the residue with fresh oil and the amount of residue formed.

For this purpose, a drop of the fresh oil is applied to the residue and rubbed gently by means of rounded glass rod and circular movements.

The results show that the high temperature oil according to the invention produces 4.8% fewer residues than the known oil, which has a residue of 6.0%. The formed residue of the high-temperature oil according to the invention is very easy to dissolve, which means that these residues are easily dissolved with fresh oil. In contrast, the residue of the known oil can dissolve much worse with fresh oil again. 1.4. Performance chain test

FIG. 12 shows the performance chain test bench which operates under the following test conditions

Temperature: 220 ° C,

Speed: 2 m / sec,

Load: 2600 N Running time after 0.1% chain elongation 22 hours in Example 1 and 17 hours in Comparative Example 1.

Before the test, the chain is immersed in the lubricating oil to be tested. After diving, the chain is hung up, leaving the excess

Lubricant can drain off. Then we put the necklace in the

Chain test stand installed (see Figure 10) and started the test under the specified conditions. It can change the temperature, the

Speed and the load can be varied.

The maturity is fixed with a chain elongation of 0.1%. The elongation of the

Chain is created by wear on the chain links throughout the

Test run.

Example 2

Composition of the high-temperature oil according to the invention:

82% by weight of aromatic trimellitic acid ester

2.7% by weight of fully hydrogenated polyisobutylene

0.3% by weight of wear protection agent

4.5% by weight of antioxidant

0.5% by weight corrosion inhibitor

The preparation is carried out as described in Example 1. Comparative Example 2

Composition of the three-component high-temperature oil:

55.7% by weight of aromatic trimellitic acid ester

7 wt .-% polyisobutylene

33.20% by weight of synthetic hydrocarbon

0.30 wt .-% wear protection agent

3.7% by weight of antioxidant

0.10% by weight corrosion inhibitor The preparation is carried out as described in Comparative Example 1.

The advantages of the high-temperature oil according to the invention are shown below.

The basic data of the oil according to Example 2 and Comparative Example 2 are shown in Table 4.

Table 4

2.1. Thermal resistance tests

Investigations were carried out with regard to evaporation and viscosity under temperature load of 5 g weight in an aluminum dish at 230 ° C. For this purpose, the oils were compared according to Example 2 and Comparative Example 2 with each other. Table 5

The above results show that by using fully hydrogenated polyisobutylene in a two-component high temperature oil, the increase in viscosity and evaporation loss can be significantly reduced as compared with the known three-component oil. These results are also shown graphically in FIGS. 5 and 6.

2.2. Comparison of friction values

The oils prepared in Example 2 and Comparative Example 2 were used to determine the friction values. For this purpose, a vibration friction wear test (SRV) based on DIN 51834, test condition ball / disc, 250 N load, 50 ° C to 250 ° C, 1 mm stroke 50 Hz, 165 min was performed. The results are shown in Table 6. Table 6

SRV TST 250 N point Example 2 Comparative Example 2

Friction coefficient Friction coefficient

50 to 120 ° C 0.097 0.105

up to 140 ° C 0.093 0.112

up to 160 ° C 0.122 0.129

up to 180 ° C 0.133 0.136

up to 200 ° C 0.138 0.143

to 210 ° C 0.139 0.157

up to 220 ° C 0.136 0.175

up to 230 ° C 0.138 0.186

up to 240 ° C 0.136 0.196

to 250 ° C. 0.136 0.205 These results, which are also shown in FIG. 4, show the positive effect of the high-temperature oil on a two-component basis on the coefficient of friction in comparison with the three-component system.

2.3. Residue behavior after complete evaporation of the oil at 250 ° C

The formation of residues and the behavior of the residues in terms of solubility were investigated. The method is described in Example 1. Both the high-temperature oil according to the invention and the known oil had a residue of 3.0%, and the formed residue of the high-temperature oil according to the invention was very readily soluble, which means that these residues can be easily dissolved with fresh oil. In contrast, the residue of the known oil can dissolve much worse with fresh oil again. 2.4. Performance chain test

The performance chain test was carried out at 220 ° C, a speed of 2.0 m / sec and a load of 2600 N. The run time after 0.1% chain elongation for example 2 is 19 h, that of comparative example 2 is 17 h.

The test was carried out as described in Example 1. Example 3

Composition of the high-temperature oil according to the invention:

45.4% by weight of aromatic trimellitic acid ester

48.00 wt .-% fully hydrogenated polyisobutylene

2.5% by weight of wear protection agent

3.0% by weight of antioxidant

0.1% by weight corrosion inhibitor

The preparation was carried out as described in Example 1. Comparative Example 3

Composition of the three-component high-temperature oil:

47.0% by weight of aromatic trimellitic acid ester

17.4% by weight of polyisobutylene

29.0% by weight of synthetic hydrocarbon

3.5% by weight of wear protection agent

3.0% by weight of antioxidant

0.10% by weight corrosion inhibitor The preparation was carried out as described in Comparative Example 1.

The advantages of the high-temperature oil according to the invention are shown below. IS

The basic data of the oil according to Example 3 and Comparative Example 3 are shown in Table 7.

Table 7

3.1. Thermal resistance tests

Investigations were carried out with regard to evaporation and viscosity under temperature load of 5 g weight in an elution dish at 230 ° C. For this purpose, the oils according to Example 3 and Comparative Example 3 were compared.

Table 8

Example 3 Comparative Example 3

Evaporation loss after 18% 20%

24 h / 230 ° C

Evaporation loss after 28% 38%

48 h / 230 ° C

Evaporation loss after 37% 53%

72 h / 230 ° C

Increase in apparent dyna3400 mPas 2800 mPas mix viscosity

24 h / 230 ° C

Increase in apparent dyna6000 mPas 13250 mPas mix viscosity

48 hl 230 ° C

Increase in apparent dyna12700 mPas 47000 mPas mix viscosity

72 hl 230 ° C The above results show that by using fully hydrogenated polyisobutylene in a two-component high temperature oil, the increase in viscosity and evaporation loss can be reduced as compared with the known three-component oil. These results are also shown graphically in FIGS. 8 and 9.

3.2. Comparison of friction values

The oils prepared in Example 3 and Comparative Example 3 were used to determine the friction values. For this purpose, a vibration friction wear test (SRV) based on DIN 51834, test condition ball / disc, 250 N load, 50 ° C to 250 ° C, 1 mm stroke 50 Hz, 165 min was performed. The results are shown in Table 9.

Table 9

These results, which are also shown in FIG. 7, show the positive effect of the high-temperature two-component oil on the coefficient of friction in comparison with the three-component system. 3.3. Residue behavior after complete evaporation of the oil at 250 ° C

The formation of residues and the behavior of the residues in terms of solubility were investigated. The test was carried out as described in Example 1.

The results show that the high-temperature oil according to the invention with 4.8% less residues than the known oil, which has a residue of 11, 8%. The formed residue of the high-temperature oil according to the invention is very easy to dissolve, which means that these residues are easily dissolved with fresh oil. In contrast, the residue of the known oil can dissolve much worse with fresh oil again.

3.4. Performance chain test

The performance chain test was carried out at 220 ° C, a speed of 2.0 m / sec and a load of 2600 N. The transit time after 0.1% chain elongation was 17 h for Example 3 and 15 h for Comparative Example 3. The test was carried out as described in Example 1.

Example 4

Composition of the high-temperature oil according to the invention:

62.90% by weight of aromatic trimellitic acid ester

30.00 wt .-% fully hydrogenated polyisobutylene

3.5% by weight of wear protection agent

3.0% by weight of antioxidant

0.1% by weight corrosion inhibitor

0.50% by weight ionic liquid The preparation was carried out as described in Example 1. The ionic liquid used was HDP imide (= trihexyl (tetradec-phosphonium bis (trifluoromethylsulfonyl) imide).

Comparative Example 4 (corresponds to Example 1)

Composition of the high-temperature oil according to the invention

63.40% by weight of aromatic trimellitic acid ester

30.00 wt .-% fully hydrogenated polyisobutylene

3.5% by weight of wear protection agent

3.0% by weight of antioxidant

0.1% by weight corrosion inhibitor

The preparation was carried out as described in Example 1.

The basic data of the oil according to Example 4 and Comparative Example 4 are shown in Table 10.

Table 10

Viscosity at 40 ° C 200 mm ² / sec Example 4 Comparative Example 4

(corresponds to example 1)

Look clearly clear

Kinematic viscosity 40 ° C 270.0 mm ² / sec 271, 0 mm ² / sec

Kinematic viscosity 100 ° C 24 mm ² / sec 25 mm ² / sec

Flash point> 250 ° C> 250 ° C

Pour point -30 ° C -30 ° C 4.1. Thermal resistance tests

Investigations were carried out with regard to evaporation and viscosity under temperature load of 5 g weight in a closed aluminum dish at 250 ° C. The evaporation loss after 72h / 250 ° C was 19%. The increase in apparent dynamic viscosity in mPas after 72h / 250 ° C was 2300 mPas.

Table 11

The above results show that the use of HDP-imide can again significantly improve the thermal stability of a two-component system. These results are also shown graphically in FIGS. 10 and 11.

Example 5

Composition of high-temperature oil according to the invention 63.5% Phloroglucin tridecylsäureester

30.0% fully hydrogenated polyisobutylene

3.5% anti-wear agent

3.0% antioxidant

0.1% by weight corrosion inhibitor

The preparation was carried out as described in Example 1. Even with the high-temperature oil based on a derivative of phhoroglucin, the results described in detail above could be obtained. The above test results show that significantly better values were obtained by the high-temperature oil according to the invention in all the investigations carried out than in the known high-temperature oils.

In summary, it can be stated that the two-component system according to the invention has a significantly higher performance in terms of thermal stability and residue formation or residue behavior. The enormous increase in thermal stability is particularly noticeable in a significant increase in the lubricating behavior. The relubrication intervals could be extended and an energy saving of up to 30% electricity savings could be achieved.

Claims

claims

1. High temperature oil for lubricating chains, track rollers and belts of continuous presses, comprising

40 to 91, 9 wt .-% of an aromatic ester of the general formula (I)

wherein R 1 is a linear or branched alkyl group having 6 to 16 carbon atoms and n is an integer of 3 to 4 or 40 to 91, 9 wt .-% of a compound of general formula (II)

wherein R is a linear or branched alkyl group having a chain length of 8 to 16 carbon atoms and n is 3 and 5 to 50 wt .-% of a hydrogenated polyisobutylene, a fully hydrogenated polyisobutylene or a mixture of a fully hydrogenated and a hydrogenated polyisobutylene.

2. high temperature oil according to claim 1, further comprising

0.1 to 6 wt .-% of an antioxidant.

3. High temperature oil according to claim 1 or 2, further comprising 1 to 4 wt .-% of a wear protection agent.

4. high temperature oil according to claim 1 to 3, further comprising 0.1 to 0.5 wt .-% of a corrosion inhibitor.

5. High temperature oil according to any one of claims 1 to 4, further comprising 0 to 2 wt .-% of an ionic liquid.

6. High-temperature oil according to one of the preceding claims 1 to 5, wherein the ester compound of the general formula (I) is selected from the group consisting of esters of trimellitic acid, pyromellitic acid, trimesic acid or a mixture thereof.

7. High temperature oil according to any one of claims 1 to 5, wherein the compound of general formula (II) is a derivative of phloroglucinol (benzene-1, 3,5-triol). is

8. High-temperature oil according to claim 7 wherein the derivative of phoroglycine Phloroglucin-trioctylic acid ester, Phloroglucintridecylsäure- ester or Phloroglucin-tridodecylsäureester is.

9. High temperature oil according to one of the preceding claims 1 to 8, wherein the antioxidant, sulfur and / or nitrogen and / or phosphorus carries in the molecule, and is selected from the group consisting of aromatic amine antioxidants, such as alkylated phenyl-alpha-naphthylamine, dialkyldiphenylamine , hindered phenols, such as butylated hydroxytoluene (BHT), phenolic antioxidants with thioether groups, Zn or Mo or W dialkyldithiophosphates and phosphites.

10. High temperature oil according to one of the preceding claims 1 to 9, wherein the wear protection agent is selected from the group consisting of anti-wear additives based on diphenyl cresyl phosphate, amine neutralized phosphates, alkylated and non-alkylated triaryl phosphates, alkylated and non-alkylated triaryl thiophosphates, zinc or Mo or W-dialkyldithiophosphates, carbamates, thiocarbamates, zinc or Mo or W dithiocarbamates, dimercapto thiadiazole, calcium sulfonates and benzotriazole derivatives.

11. High-temperature oil according to one of the preceding claims 1 to 10, wherein the corrosion inhibitor is selected from the group consisting of additives based on overbased Ca sulfonates, amine-neutralized phosphates, alkylated Ca naphthalenesulfonates, oxazoline derivatives, imidazole derivatives, succinic acid, N-alkylated benzotriazoles.

12. High-temperature oil according to one of the preceding claims 1 to 11, wherein the ionic liquid is selected from the group consisting of tetraalkylammonium and tetraalkylphosphonium bis (trifluoromethylsulfpnyl) imides such as trihexyl (tetradecyl) phosphonium bis (trifluromethylsulfonyl) imide (HPDimide) and methyltrioctylammonium bis (trifluoromethylsulfonyl) imide (moimide), and tetraalkylammonium and tetraalkylphosphonium tris (perfluoroethyl) trifluorophosphate, especially tetrabutylphosphonium tris (perfluoroethyl) trifluorophosphate (BuPPFET), trihexyl (tetradecyl) tris (perfluoroethyl) trifluorophosphate (HDPPFET), pyrrolidium tris (perfluoroethyl) trifluorophosphates, tetraalkylammonium, Tetraalkylphosphonium perfluorobutanesulfonate, trihexyl (tetradecyl) phosphonium perfluorobutanesulfonate (HDPnonaflat).

13. Use of the high-temperature oil according to one of claims 1 to 12 in the field of industrial chain lubrication in conveyors,

Painting lines, textile industry, insulation industry, glass industry and belt lubrication are used in continuous wood pressing plants.