Michael adduct amino esters as total base number boosters for marine diesel engine lubricating compositions

US10577556B2 · kind B2 · utility

Assignee

• The Lubrizol Corporation · US

Inventors

• Daniel J. Saccomando · Sheffield, GB
• Natasha K. Horn · Wheatley, GB
• Ewan E. Delbridge · Powell, US
• Stephen J. Cook · Belper, GB
• John K. Pudelski · Cleveland Heights, US
• Mark C. Davies · Pudong New District, CN

Key dates

• Filing date: Jun 10, 2016
• Grant date: Mar 3, 2020
• Expiry date: Aug 31, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2070/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A lubricating composition suited to use in a marine diesel engine includes an oil of lubricating viscosity and an amino carboxylate compound of formula (I): NR1R2—((CHR3)xNR4)n—(CHR5)2—COY, where R1 and R2 are independently selected from —(CHR6)2—COY′, H, and C1C3 alkyl and wherein at least one of R1 and R2 is —(CHR6)2—COY′; or wherein NR1R2 is a cyclic structure; Y and Y′ are independently selected from —OR7, NHR7, and —N(R7)2; each R7 is independently selected from C6-C12 alkyl and C6-C12 alkenyl; R3, R5 and R6 are independently selected from H and C1-C4 alkyl; R4 is selected from H, C1-C4 alkyl, and (CHR3)xNH2; x is from 2 to 4; and n is at least 1, except where NR1R2 is a cyclic structure, where n is at least 0.