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Blends of lubricant basestocks with polyol esters

a technology of lubricant basestocks and esters, applied in the direction of base materials, lubricant compositions, additives, etc., can solve the problem that the arrhenius equation is not applicable to the case of associated solutions such as methanol and water

Inactive Publication Date: 2007-10-04
GAO JASON Z +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]Accordingly, there is provided a lubricating composition comprising a polyol ester which is the reaction product of a neopolyol with linear or branched monocarboxylic acids and mixtures thereof having from 1 to about 25 carbon atoms and a

Problems solved by technology

As is known, the Arrhenius equation is not applicable to the cases of associated solutions such as methanol and water.

Method used

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  • Blends of lubricant basestocks with polyol esters
  • Blends of lubricant basestocks with polyol esters
  • Blends of lubricant basestocks with polyol esters

Examples

Experimental program
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example 1

[0074]In this example a series of lubricating compositions were prepared from a polyol ester and a mixture of mineral oils. The polyol ester was a high hydroxyl ester (HHE) obtained from Exxon Chemical Co., Houston, Tex. and had about 1 hydroxyl group per molecule (corresponding to approximately 105 mg KOH / gram). The mineral oil was a mixture of MCT 10 and MCT 30, sold by Imperial Oil Co., Calgary, Canada, and the ratio was adjusted to give a similar viscosity to the HHE ester. The kinematic viscosity of the ester at 100° C. was 8.506 cSt and the kinematic viscosity at 100° C. of the MCT mixture was 8.547 cSt. The kinematic viscosity of the mixtures were determined at 100° C. and at 40° C. The results are presented in FIGS. 1 and 2. The Cold Cranking Simulator (CCS) viscosity at −10° C. was also determined (ASTM Test D5293), and the results are presented in FIG. 3. The data are also shown in Table 1.

TABLE 1Kinematic Viscosity and CCS Viscosity Data of HHE and MCT BlendsMCTHHEkV @kV ...

example 2

[0075]The procedure of Example 1 was followed except that the polyol had a kinematic viscosity at 100° C. of 4.008 cSt, and the oil was a GTL oil that had a kinematic viscosity of 3.724 cSt at 100° C.

[0076]The viscosity and cold cranking properties of the compositions and components are given in FIGS. 4 to 6. The data are shown in Table 2.

TABLE 2Kinematic Viscosity and CCS Viscosity Data of HHE and GTL BlendsOil03-3328903-3329003-3329103-3329203-3329303-33294Componentwt %wt %wt %wt %wt %wt %HHE10080604020GTL20406080100KV at 100 C., cSt4.0083.8273.7003.6533.6383.724KV at 40 C., cSt19.11817.52216.44615.9415.69416.07CCS at −30, cSt23531732135911971038992

example 3

[0077]The procedure of Example 1 was followed except that the ester was a polyol ester with a mixed alkyl groups ranging from C2 to C24, with no free hydroxyl groups and a Kv at 100° C. of 5.004. Also, the oil was a GTL oil having a Kv at 100° C. of 4.240. The viscosity properties of the components and blends are given in FIGS. 7 and 8.

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Abstract

A lubricating composition is provided comprising a polyol ester which is the reaction product of a neopolyol with linear or branched monocarboxylic acids and mixtures thereof having from 1 to about 25 carbon atoms and a natural or GTL oil of lubricating viscosity and mixtures thereof and wherein the weight ratio of the ester to oil will be sufficient to provide a composition having a viscosity less than the individual viscosities of the ester and oil.

Description

[0001]This application claims priority of Provisional Application 60 / 786,511 filed Mar. 28, 2006.FIELD OF THE INVENTION[0002]The present invention relates to blends of lubricant basestocks with polyol esters. More particularly, the invention relates to such blends in which the blends have a viscosity lower than the viscosity of the individual components.BACKGROUND OF THE INVENTION[0003]Lubricants in commercial use today are composed of a variety of natural and synthetic basestocks and performance enhancing additives which are selected depending upon their intended application. The natural basestocks typically include vegetable and mineral oils. The synthetic basestocks typically include polyalpha olefins and polyol esters. These natural and synthetic basestocks may be used alone or blended and formulated into a lubricating composition.[0004]Basestocks may be blended for any of a variety of reasons. Typically blending is performed to alter one or more properties such as viscosity, vi...

Claims

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Application Information

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IPC IPC(8): C10M105/38C10M129/74
CPCC10M105/40C10M105/42C10M2205/173C10M2207/2895C10M2207/401C10N2240/10C10N2230/02C10M2207/301C10N2030/02C10N2040/25
Inventor GAO, JASON Z.HABEEB, JACOB J.
Owner GAO JASON Z
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