High performance gear oil and related methods

US12384983B2 · kind B2 · utility

Assignee

• Exxon Mobil Technology and Engineering Company · US

Inventors

• Harrison T. Hawkins · Medford, US
• Michael L. Blumenfeld · Haddonfield, US
• Nilka Y. BROWN · Conroe, US
• Rugved P. Pathare · Sarnia, CA

Key dates

• Filing date: May 1, 2024
• Grant date: Aug 12, 2025
• Expiry date: May 1, 2044

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2040/04
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Gear oil compositions including a first oil basestock and a second basestock. The first basestock includes a Group II bright stock having a kinematic viscosity (ASTM D445, 40° C.) of from 250 mm2/s to 600 mm2/s, a kinematic viscosity (ASTM D445, 100° C.) of from 20 mm2/s to 70 mm2/s, a viscosity index (ASTM D2270) of from 80 to 120, and a pour point (ASTM D97) of from −50° C. to −20° C. The second basestock includes a polyalphaolefin (PAO) basestock having a kinematic viscosity (ASTM D445, 40° C.) of from 500 mm2/s to 3500 mm2/s, a kinematic viscosity (ASTM D445, 100° C.) of from 60 mm2/s to 300 mm2/s, a viscosity index (ASTM D2270) of from 150 to 250, and a pour point (ASTM D97) of from −50° C. to −20° C.