synergistic dispersant

A technology of dispersants and additives, applied in the direction of additives, lubricating compositions, petroleum industry, etc., which can solve the problems of harmful seals and increased corrosion

Active Publication Date: 2020-03-03
AFTON CHEMICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high dispersant treat rates can increase corrosion and be detrimental to seals

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0165] The following examples are illustrative, but not limiting, of the methods and compositions of the present application. Other appropriate modifications and adaptations of the various conditions and parameters commonly encountered in the art and apparent to those skilled in the art are within the spirit and scope of the application. All patents and publications cited in this application are hereby incorporated by reference in their entirety.

[0166] Tests to evaluate the measured effective concentration

[0167] In order to evaluate lubricant formulations according to the present application, various dispersant combinations were tested for their ability to disperse soot. A sooting oil with 4.3 wt% soot was produced from a diesel fired engine using fluid without dispersant. The oil is then tested by shear rate sweeps in a cone and plate rheometer to determine Newtonian / non-Newtonian behavior.

[0168] The results for untreated soot-adhering oil are shown in figure 1 m...

Embodiment 1

[0192] Lubricant compositions were prepared using a sample of the soot adhesion oil described above and an additive composition containing two dispersants and the additional additives listed above. The first dispersant was PIBSA comprising a mixture of MW 1300HR PIB and MW 2300MW PIB.

[0193] The second dispersant in the combination is the post-treatment reaction product of PIBSA (containing highly reactive PIB with a molar ratio of SA:PIB of 1.75:1) and tetraethylenepentamine, wherein the molar ratio of PIBSA:amine is 4:1: 3 to 2:1. The reaction product is then worked up with naphthalenedicarboxylic anhydride. The weight percent of the first dispersant in the lubricant composition was held constant at 29.5 wt % to provide the lubricant composition with 2.25 wt % polymer, based on the total weight of the lubricant composition. The weight percent of the second dispersant was varied to provide different amounts of the polymer of the second dispersant to the lubricant composit...

Embodiment 2

[0196] Lubricant compositions were prepared using a sample of the soot adhesion oil described above and an additive composition containing two dispersants and the additional additives listed above. The first dispersant in the combination is the reaction product of a mixture of highly reactive PIB and succinic anhydride SA (SA:PIB molar ratio of 1.15:1) with a mixture of triethylenetetramine and E-100 (bottoms), wherein The molar ratio of PIBSA:amine is 4:3 to 2:1.

[0197] The second dispersant in the combination is the workup reaction product of a mixture of highly reactive PIB and succinic anhydride (1.75:1 molar ratio SA:PIB) with a mixture of triethylenetetramine and E-100 (bottoms), wherein the molar ratio of PIBSA:amine is 4:3 to 2:1. The product is then worked up with a mixture of naphthalic anhydride and maleic anhydride. The weight percent of the first dispersant in the lubricant composition was kept constant at 50 wt% to provide the lubricant composition with 1.65 ...

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Abstract

The present application relates to lubricant compositions including additive compositions and methods of use thereof in soot-generating engines. The lubricant composition comprises a base oil and an additive composition comprising: (a) at least 0.05% by weight of a first dispersant based on the total weight of the lubricant composition, the first dispersant is the reaction product of A) a hydrocarbyl dicarboxylic acid or hydrocarbyl dicarboxylic acid anhydride, and B) at least one polyamine; and (b) at least 0.05% by weight of a second dispersant based on the total weight of the lubricant composition, so The second dispersant is the reaction product of A') a hydrocarbyl dicarboxylic acid or hydrocarbyl dicarboxylic acid anhydride, and B') at least one polyamine, wherein the reaction product is post-treated with C and / or D, wherein C) is Aromatic carboxylic acids, aromatic polycarboxylic acids, or aromatic anhydrides, wherein all carboxylic acid or anhydride groups are directly attached to aromatic rings, D) nonaromatic dicarboxylic acids or nonaromatic dicarboxylic acids having a number average molecular weight of less than about 500 anhydride.

Description

technical field [0001] The present application relates to lubricant compositions, and in particular, to improve or maintain the soot or sludge handling characteristics of engine lubricant compositions while enabling the treat rate of dispersants in the lubricant compositions Minimized additive composition. Background technique [0002] Engine lubricant compositions can be selected to provide enhanced engine protection, as well as improved fuel economy, and reduced emissions. However, to achieve the benefits of improved fuel economy and reduced emissions, lubricant compositions are required to balance engine protection and lubricating performance. For example, increasing the amount of friction modifier may be beneficial for fuel economy purposes, but may result in a reduction in the ability of the lubricant composition to handle water. Similarly, increasing the amount of antiwear agent in the lubricant may provide improved engine protection against wear, but may be detrimen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M133/56C10M141/06C10N30/04C10N40/25
CPCC10M133/16C10M133/56C10M141/06C10M2207/129C10M2215/24C10N2030/041C10N2030/04C10N2030/74C10N2040/25C10M2207/123C10M2207/142C10M2207/16C10M2215/04C10M2215/28C10M2223/045C10M133/52C10M161/00C10M133/00C10N2020/04C10N2020/083C10N2030/50C10N2030/54C10N2040/253C10N2040/251C10N2040/252C10N2040/255C10N2060/00C10M169/04C10N2030/06C10N2030/10C10N2030/12C10N2030/02C10N2030/24C10M159/12
Inventor D·坎贝尔J·拉格纳
Owner AFTON CHEMICAL
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