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Composition for low temperature

a technology of composition and low temperature, applied in the field of composition for low temperature, can solve the problems of reducing shear stability and difficulty in developing lubricant compositions that offer

Inactive Publication Date: 2017-06-15
BASF SE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The lubricant composition exhibits excellent low-temperature viscosity, high shear stability, and oxidation stability, making it suitable for various applications including engine oils and industrial uses.

Problems solved by technology

U.S. Pat. No. 5,451,630 describes the general dilemma when using thickening agents in lubricant compositions because the increase of viscosity is directly related to the molecular weight of the polymeric thickening agent while on the other hand the shear stability decreases due to the greater tendency of breakage under shear and high temperature conditions.
It is particularly difficult to develop lubricant compositions that offer the desired excellent rheological properties at very low temperatures as well as at elevated temperatures.

Method used

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Methods

[0264]Measurement of the number average molecular weight Mn of polymers mentioned in the present invention has been carried out using the industrial standard DIN 55672.

[0265]The pour point of the lubricant compositions according to the present invention has been determined according to the established industrial standard DIN ISO 3016 (if not indicated otherwise).

[0266]The various kinematic viscosities of the lubricant compositions according to the present invention have been determined following established industry standards.

[0267]The kinematic viscosity at −30° C., 40° C. and 100° C., respectively, is determined according to the established industrial standard DIN 51562-1 (unless indicated otherwise).

[0268]The dynamic viscosity is determined based on DIN 51562-1 and further calculated by multiplication of the measured kinematic viscosity with the corresponding density.

[0269]The viscosity index has been determined according to the industrial standard DIN ISO 2909 (if not ind...

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Abstract

Lubricant composition comprising a dicarboxylic acid ester component which is formed from a dicarboxylic acid selected from the list consisting of adipic acid, phthalic acid, pimilic acid, suberic acid, azelaic acid and sebacic acid, and mixtures thereof and a branched aliphatic alcohol R—OH which is defined according to the following formula (I)whereas q, r and s are defined as follows,q+r=4 to 9,s=0 to 5,q=1 to 8, andr=1 to 6,andan ethylene-propylene copolymer.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a national stage application (under 35 U.S.C. §371) of PCT / EP2014 / 075814, filed Nov. 27, 2014, which claims benefit of European Application No. 131949113, filed Nov. 28, 2013, both of which are incorporated herein by reference in their entirety.DESCRIPTION[0002]The present invention relates to the field of lubricants. The lubricant compositions contain a dicarboxylic acid ester and an ethylene-propylene copolymer. The lubricant compositions can be used in a variety of different oil formulations required in motor vehicles.TECHNICAL BACKGROUND[0003]Commercially available lubricant compositions are based on a multitude of different natural or synthetic components. The resulting properties of the various existing lubricant compositions are tailored to the specific technical requirements by the addition of further components and selected combinations thereof. In this way, lubricant compositions are obtained which can fulfil...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10M111/04C10M169/04C10M105/36
CPCC10M111/04C10M2207/30C10M169/041C10M2207/282C10M2205/022C10M2205/024C10N2230/02C10N2240/04C10N2240/30C10N2240/08C10N2240/14C10N2240/02C10M2207/281C10N2240/10C10N2230/68C10M2205/0245C10M2205/0225C10M105/36C10M2207/2825C10M2205/028C10M2205/0285C10N2020/02C10N2030/02C10N2030/10C10N2030/68C10N2040/04C10N2040/25C10N2040/08C10N2040/30C10N2040/02C10N2040/135
Inventor RETTEMEYER, DIRKRINKLIEB, RONNYSCHERER, MARKUS
Owner BASF SE
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