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Lubricant composition

a technology of compositions and lubricants, applied in the field of lubricant compositions, can solve the problems of many biolubricants not being optimally used in applications, and achieve the effects of low pour point, high viscosity index, and favorable low and high temperature viscosity

Inactive Publication Date: 2014-01-09
DOW GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes new lubricant compositions made from renewable materials that have good viscosity at high and low temperatures, as well as low pou points. These lubricants are suitable for a variety of temperature conditions, including extreme cold. Additionally, they have excellent stability and do not change in viscosity over time when heated repeatedly.

Problems solved by technology

As a consequence, many biolubricants are not optimal for use in applications where these performance criteria are needed including, for instance, applications where very low temperatures may be experienced, such as with outdoor mobile equipment.

Method used

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Examples

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examples

[0030]Polymers for evaluation in the examples may be prepared as follows.

Alkoxylation Procedure:

[0031]Alkoxylations are carried out on a 10 liter stainless steal reactor which is temperature controlled via an external thermostatic control unit containing silicone oil. The oxide dosing system is controlled by weight and limited by a maximum pressure in the reactor of 4.5 bar.

[0032]Polyol and catalyst (45 wt % KOH in water) are charged into the reactor at 50° C. In order to limit discoloration due to oxidation reactions the reactor is flushed five times with nitrogen. The stirrer is started and the speed is set to 500 rpm. Next the reactor content is brought to 100° C. and vacuum is applied (30 mbar) in order to remove the water from the initiator / catalyst mixture. The oxide feeding bomb is filled with propylene oxide (PO). After typically 1 hour flashing, samples are taken from the mixture in the reactor and water content is determined by titration. When the water content reaches the...

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Abstract

Provided is a lubricant composition derived from renewable materials and that is useable in cold weather conditions and exhibits oxidative stability. The lubricant composition comprises a polymer of Formula (I), wherein R and p are as described in this specification.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority from provisional application Ser. No. 61 / 468,625, filed Mar. 29, 2011, which is incorporated herein by reference in its entirety.BACKGROUND[0002]The invention relates generally to lubricant compositions and to methods of their preparation and use. More particularly, the invention relates to lubricant compositions that may be prepared from renewable sources and that exhibit a combination of favorable viscosity, stability, and pour point characteristics.[0003]“Bio-lubricants,” or lubricants based upon renewable resources such as seed oils and vegetable oils rather than from petroleum or natural gas, represent a small, but growing segment of total global lubricants demand. Natural esters (for example, canola oil) and synthetic esters can be used to formulate bio-lubricants that conform to the requirements of the European Eco-label (European Commission 2005 / 360 / EC). These formulations must contain certain mini...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10M107/20
CPCC10M107/20C10M105/38C10M107/34C10M129/74C10M145/38C10M2209/109C10N2020/02C10N2030/10C10N2070/00C10M2209/105
Inventor VINCI, DANIELEKERSBULCK, JOCHEMGREAVES, MARTIN R.
Owner DOW GLOBAL TECH LLC