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Alkylthioperoxydithiophosphate lubricant additives

Inactive Publication Date: 2013-11-07
BOARD OF RGT THE UNIV OF TEXAS SYST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

The invention describes a new type of chemical compound called alkylthioperoxydiphosphates that have several advantages, including being effective lubricant additives. These compounds have a unique structure and properties that make them useful in various applications. The patent also describes a method of making these compounds using a two step process involving oxidizing a specific chemical. Overall, the invention provides a new and effective tool for developing innovative lubricant additives.

Problems solved by technology

Although the exact pathways leading to the formation of anti-wear film on metal surfaces are not well understood due to the complicated characteristics of reactions in lubricant formulations, it is generally accepted that the thermal, hydrolytic, and oxidative decomposition of ZDDP is involved.
The lubrication mechanism of ashless additives is more complicated than that of ZDDP due to the variety of chemical structures.

Method used

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  • Alkylthioperoxydithiophosphate lubricant additives
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  • Alkylthioperoxydithiophosphate lubricant additives

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Embodiment Construction

[0031]The present disclosure may take form in various components and arrangements of components, and in various process operations and arrangements of process operations. The present disclosure is illustrated in the accompanying drawings, throughout which like reference numerals may indicate corresponding or similar parts in the various figures. The drawings are only for purposes of illustrating preferred embodiments and are not to be construed as limiting the disclosure. Given the following enabling description, the novel aspects of the present disclosure should become evident to a person of ordinary skill in the art.

[0032]The general structure of alkylthioperoxydiphosphates is illustrated below:

[0033]Alkylthioperoxydiphosphates having an alkyl chain length between 4 and 18 carbons were synthesized via a two-step reaction, O,O-dialkyl dithiophosphoric acids were obtained by mixing phosphorus pentasulfide with appropriate alcohols at an elevated temperature in toluene; this facile r...

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Abstract

Alkylthioperoxydiphosphates having an alkyl group between about 4 and 18 carbons, a decomposition temperature between about 150 and 300° C. and a wear volume between about 0.0025 and 0.0015 mm3 in HFRB testing, and methods of making same. Lubricant additives that includes the alkylthioperoxydiphosphates.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to provisional application Ser. No. 61 / 642,921 filed on May 4, 2012.BACKGROUND OF THE INVENTION[0002]Zinc dialkyldithiophosphates (ZDDPs) have been the primary anti-wear and antioxidant additives in engine oil and other industrial lubricant formulations for more than 60 years. Over the past half century, considerable research efforts have been focused on the characterization of ZDDP tribofilm to elucidate its chemical composition and molecular structure, and the mechanism of tribofilm formation. Although the exact pathways leading to the formation of anti-wear film on metal surfaces are not well understood due to the complicated characteristics of reactions in lubricant formulations, it is generally accepted that the thermal, hydrolytic, and oxidative decomposition of ZDDP is involved. In addition it is understood that the degraded intermediates of ZDDP are actively involved with the formation of protectiv...

Claims

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Application Information

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IPC IPC(8): C10M137/10
CPCC10M137/105C07F9/1655C07F9/17C10M2223/045C10N2030/06C10N2070/00
Inventor ASWATH, PRANESHCHEN, XINKIM, BOHOONELSENBAUMER, RONALD L.
Owner BOARD OF RGT THE UNIV OF TEXAS SYST
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