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1-decene/1-dodecene copolymer and lubricating-oil composition containing same

a technology of -olefin polymer and lubricating oil, which is applied in the direction of lubricant composition, organic chemistry, fuels, etc., can solve the problems of high cost of -olefin polymer products for lubricating oil, high demand for 1-decene, and limited quantity of 1-decene production, etc., to achieve excellent physical properties, excellent viscosity characteristics, and low temperature flowability. , the effect o

Inactive Publication Date: 2014-08-21
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a way to make a high-viscosity lubricant oil with good viscosity characteristics, low-temperature properties, and oxidation stability. This is done by using a douly bridged metallocene catalyst to effectively use other fractions than 1-decene, which can provide a polymer for lubricant oil with the same physical properties as 1-decene homopolymer. This results in a relatively low-cost product.

Problems solved by technology

However, 1-decene is merely one fraction of an α-olefin produced in an α-olefin producing apparatus, in which many other fractions are produced at the same time, and therefore the quantity of production of 1-decene is limited.
Consequently, the demand for 1-decene is high and 1-decene is expensive, and for these reasons, the cost of α-olefin polymer products for lubricant oil is high.
However, the obtained α-olefin polymer was not satisfactory in point of the viscosity index, the pour point and the durability thereof.
An example of using a metallocene catalyst in producing an α-olefin polymer is known in Patent Reference 3, which, however, has some problems in that only a low-molecular-weight polymer could be obtained and the low-temperature characteristics of the obtained polymer are unsatisfactory.

Method used

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  • 1-decene/1-dodecene copolymer and lubricating-oil composition containing same
  • 1-decene/1-dodecene copolymer and lubricating-oil composition containing same
  • 1-decene/1-dodecene copolymer and lubricating-oil composition containing same

Examples

Experimental program
Comparison scheme
Effect test

production example 1

Production of (1,1′-dimethylsilylene)(2,2′-dimethylsilylene)-bis(cyclopentadienyl)zirconium dichloride

[0102]About 13.8 g (600 mmol) of metal Na and 400 ml of dry THF (tetrahydrofuran) were put into a nitrogen-purged 1000-ml three-neck flask, and stirred therein at 0° C. After 5 minutes, from 1 to 2 ml of cyclopentadiene was dropwise added thereto, and when the hydrogen generation was stopped, from 1 to 2 ml of cyclopentadiene was newly added thereto. This was repeated so that 50 ml (600 mmol) in total of cyclopentadiene was added. The reaction solution changed from colorless transparent to pale pink. After removal of THF through distillation under reduced pressure, the crystal was washed twice with hexane and dried into solid under reduced pressure to give cyclopentadienyl sodium as a pink powder.

[0103]457 ml of THF was added to 43.0 g (480 mmol) of cyclopentadienyl sodium and stirred at 0° C. This was cooled to −78° C., and 29.2 ml (480 mmol) of dichlorodimethylsilane was gradually...

example 1-1

[0109]A stainless autoclave having an inner capacity of 1 liter was fully dried and purged with nitrogen, and thereafter 80 ml of 1-dodecene and 320 ml of 1-decene, and next 0.2 mmol of triisobutylaluminium were put into it, and heated up to 105° C. One ml of a catalyst mixture prepared separately (this was prepared as follows: 0.1 mmol of triisobutylaluminium (2 mmol / ml toluene solution; 0.05 ml), 10 ‘Imo’ of (1,1′-dimethylsilylene)(2,2′-dimethylsilylene)-bis(cyclopentadienyl)zirconium dichloride prepared in Production Example 1 (10 μmol / ml toluene solution; 1 ml) and 0.012 mmol (11.5 mg) of powdery N,N-dimethylanilinium tetrakis(pentafluorophenyl)borate were put into a 10-ml glass-made Schlenk bottle in a nitrogen atmosphere, and stirred for 1 minute or so, and then 0.5 ml of 1-decene was added thereto and further stirred at room temperature for 1 hour) was put into the autoclave, and 0.05 MPaG hydrogen was introduced thereinto to start polymerization. After 60 minutes at 105° C.,...

example 1-2

[0110]In the same manner as in Example 1-1 except that the polymerization temperature was 90° C., a colorless transparent polymer from which the components having 24 or smaller carbon atoms had been removed, and then its hydrogenated product were obtained in an amount of 249 g each. These were analyzed according to the above-mentioned methods, and the results are shown in Table 1.

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Abstract

Provided are an α-olefin copolymer useful as a high-viscosity lubricant oil excellent in viscosity characteristics, low-temperature characteristics and oxidation stability, and a lubricant oil containing the copolymer. The α-olefin copolymer is a 1-decene / 1-dodecene copolymer produced by the use of a doubly bridged metallocene catalyst.

Description

TECHNICAL FIELD[0001]The present invention relates to a 1-decene / 1-dodecene copolymer and a lubricant oil composition containing it.BACKGROUND ART[0002]As the characteristics heretofore required for the lubricant oil for automobiles and industrial machinery, the lubricant oil is desired to have a relatively high viscosity from the lubrication performance thereof. However, for environmental considerations that have become specifically discussed these days, further advanced fuel efficiency, energy saving and life prolongation are desired. As compared with poly-α-olefins and others heretofore employed in the art, a synthetic lubricant oil having more excellent viscosity characteristics (viscosity index), low-temperature characteristics (low-temperature flowability) and oxidation stability is desired.[0003]For hydrocarbon-based synthetic lubricant oil, an α-olefin polymer obtained from a relatively short-chain α-olefin has a defect in that its viscosity index is low, while an α-olefin p...

Claims

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Application Information

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IPC IPC(8): C10M103/00
CPCC10M3/00C10M107/10C10N2230/02C10M2205/0285C08F210/14C10N2240/08C08F4/65908C10N2220/022C10N2230/10C10N2240/10C08F4/65912C10N2220/021C10N2270/00C08F8/04C10N2020/04C10N2020/02C10N2030/02C10N2030/10C10N2040/25C10N2040/08C10N2070/00C08F2500/03C08F2500/17C08F4/65927C10N2060/02
Inventor SHIMIZU, HITOMIKATAYAMA, KIYOKAZUNODA, HIDEAKIOKANO, MASAKI
Owner IDEMITSU KOSAN CO LTD
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