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Dispersant Additives and Additive Concentrates and Lubricating Oil Compositions Containing Same

A technology for additive concentrate and dispersant, which is applied in the field of lubricant additive concentrate and stabilized lubricant oil concentrate, and can solve the problem of inability to provide high-functionality carboxylic acid acylating agent.

Pending Publication Date: 2017-02-15
INFINEUM INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using "traditional" Lewis acid catalyzed polyenes, it is not possible to provide high functionality carboxylic acid acylating agents, especially polyisobutylene succinic anhydride ("PIBSA"), via a halogen-free thermal reaction method

Method used

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  • Dispersant Additives and Additive Concentrates and Lubricating Oil Compositions Containing Same
  • Dispersant Additives and Additive Concentrates and Lubricating Oil Compositions Containing Same

Examples

Experimental program
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Effect test

Embodiment

[0061] As noted above, dispersant chain extension refers to an increase in the size of the dispersant resulting from the condensation of multifunctional PIBSA units with multifunctional amine units. Dispersant chain extension can be conveniently assessed by examining the thickening efficiency (TE) of the dispersant as a 1% active ingredient (AI) solution in SN100 base oil:

[0062] TE=log vis / vis 0

[0063] where vis = kinematic viscosity of the solution and vis 0 =Viscosity of SN100 base oil at 100°C.

[0064] Table 1 compares the TE of dispersants prepared from PIBSA prepared by the chlorine-assisted process using traditional PIB versus PIBSA prepared by the ene process using HR-PIB at various PIB molecular weights and succinic acid functionality levels. The same polyamine and stoichiometry were used in the preparation of all samples.

[0065] Table 1

[0066] Ex. Malayization PIB Mol.Wt. functionality TE 1 chlorine assist 2225 1.4 0.057 2 ...

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Abstract

A lubricant additive concentrate having a kinematic viscosity of from about 40 to about 300 cSt at 100 DEG C., containing a dispersant-detergent colloid complex, including a polybutenyl succinimide dispersant that is the reaction product of a polyamine and polybutenyl succinic anhydride (PIBSA) derived from polybutene having a number average molecular weight (Mn) of from about 1300 to about 2500 and a terminal vinylidene content of at least about 65%, and succinic and / or maleic anhydride via an ene maleation process, the PIBSA having a succinic anhydride (SA) functionality (F) of greater than 1.7 and less than about 2.5; and a detergent colloid including overbased detergent having a total base number (TBN) of from about 370 to about 1000 mg KOH / g derived from one or more surfactants selected from (i) sulfonate; (ii) phenate; and (iii) carboxylate surfactant; in which the mass ratio of the dispersant to the overbased detergent colloid in the concentrate is from about 0.5 to about 5.0; and the dispersant and overbased colloidal together constitute at least 28 mass %, of the concentrate.

Description

technical field [0001] This invention relates to improved dispersants for lubricating oil compositions and lubricating oil additive concentrates containing such dispersants. More particularly the present invention relates to improved dispersants that provide excellent control of sludge / varnish formation, piston cleanliness, ring adhesion performance and sooted oil rheology control and reduced interaction with overbased detergent colloids , thereby providing a stable lubricating oil concentrate having an acceptable kinematic viscosity comprising the dispersant and an overbased detergent colloid. Background technique [0002] Additives are often used in an attempt to improve the performance of gasoline and diesel engine lubricating oils. Additives or additive packages are used for many purposes such as improving detergency, reducing engine wear, stabilizing lubricating oils against heat and oxidation, reducing oil consumption, inhibiting corrosion and reducing frictional loss...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/06C08G73/12C10N30/02C10N30/04
CPCC08G73/12C10M169/06C10M2207/023C10M2207/144C10M2219/044C10M2217/06C10N2030/04C10N2030/02C10M163/00C10M169/045C10M2207/028C10M2207/26C10M2215/28C10M2219/046C10M2219/068C10M2223/045C10N2070/00C10N2020/04C10N2010/12C10N2010/04C10M149/10
Inventor J·埃默特S·奥伯罗伊胡岗P·J·霍宾G·B·L·斯特兰奇A·卡塔尼C·L·菲特J·R·米林顿
Owner INFINEUM INT LTD