Oil soluble antioxidant polymetharylates for lubricants

Journal Article · Mon Aug 01 04:00:00 EDT 1994 · Lubrication Engineering

OSTI ID:186180

Shirodkar, S M; Benfaremo, N ^[1]; Skarlos, L ^[2]

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1. Texaco Additive Company, Beacon, NY (United States)
2. Texaco Research and Development, Port Arthur, TX (United States)

The evaluation of oil soluble, antioxidant bound polymethacrylates used as viscosity index improver lubricant additives, is described herein. They were synthesized by copolymerization of the antioxidant-dispersant monomer and alkyl methacrylates. Oxidative stability was determined by oxidative pressure differential scanning calorimetry, thin film oxidation uptake test and aluminum beaker oxidation text. These tests show that lubricants containing these polymers show performance advantages over commercial polymethacrylates, with additional benefits in other viscometric properties such as shear stability and Brookfield viscosity. The antioxidant monomer also serves as a dispersant moiety, thus improving the polymer disperancy. Binding the antioxidant to the polymer ensures the solubility of the antioxidant while eliminating the possibility of its volatilization in high temperature environments. The current results suggest that antioxidant-dispersant polymethacrylates have excellent potential as additives in lubricants such as automatic transmission fluids. 13 refs., 5 figs., 3 tabs.

• OSTI ID: 186180
• Journal Information: Lubrication Engineering, Journal Name: Lubrication Engineering Journal Issue: 8 Vol. 50; ISSN 0024-7154; ISSN LUENAG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADDITIVES
ANTIOXIDANTS
COPOLYMERIZATION
ENGINES
LUBRICANTS
METHACRYLATES
OXIDATION
PERFORMANCE
SHEAR
SOLUBILITY
VISCOSITY