Patent · US Active

Antioxidant synergist for lubricating compositions

US7902131B2 · kind B2 · utility

4Cited by

9References

10Claims

0Family size

Assignee

R.T. Vanderbilt Company, Inc. · US

Inventors

Gaston A. Aguilar · Milford, US
Brian W. Stunkel · Stamford, US
Steven G. Donnelly · New Fairfield, US

Key dates

Filing date	Apr 26, 2007
Grant date	Mar 8, 2011
Priority date	—
Expiry date	Nov 6, 2027

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC10N2060/14
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Molybdenum-free lubricating compositions are provided, having an antioxidation additive composition based on a combination of (1) alkylated diphenylamine (APDA), (2) polyamine dispersant, and (3) monoglyceride, ethoxylated amide, or mixtures thereof. Further synergy is achieved when component (3) is borated, allowing a reduction in phosphorus levels to below 0.08% or even a phosphorus-free composition.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.