Lubricant and additive formulation

US7214648B2 · kind B2 · utility

Assignee

• Ashland Licensing and Intellectual Property LLC · US

Inventors

• Mandeep S. Saini · Lexington, US
• Thomas R. Smith · Seven Hills, US
• Michael A. Dituro · Huntington, US
• Richard J. Baumgart · Paris, US
• Frances E. Lockwood · Georgetown, US

Key dates

• Filing date: Jul 29, 2002
• Grant date: May 8, 2007
• Expiry date: Jul 29, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2070/02
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An engine lubricant formulated as a complete crankcase motor oil or additive concentrate composed of a combination of chemical constituents including a base oil selected from a synthetic oil, a mineral oil or semi-synthetic base oil (hydrogenated oil) or combination thereof, an oil soluble molybdenum additive, a dispersant inhibitor containing zinc dithiophosphate, and viscosity index improvers and one or more seal swelling agents to lubricate the engine and recondition the seals of new and/or high mileage engines. Addition of a polyalphaolefin and/or one or more esters such as a diester or polyolester may also be utilized therein. The lubricant may be formulated as a complete engine oil crankcase lubricant, or concentrated into an additive for addition to conventional mineral oil based engine oil, synthetic engine oils, or blends thereof in an effective amount of up to 30 percent volume percent, typically from 20 to 25 percent by volume.