Oil composition for automatic transmission

• US 20040014619A1
• Filed: 03/29/2002
• Published: 01/22/2004
• Est. Priority Date: 09/13/2001
• Status: Active Grant

• Current Assignee: Tonengeneral Sekiyu Kabushiki Kaisha (Exxon Mobil Corporation)
• Original Assignee: Tonengeneral Sekiyu Kabushiki Kaisha (Exxon Mobil Corporation)
• Inventors: Kato, Tomohiro, Yoshimura, Narihiko, Saputra, Asep Handaya
• Granted Patent: US 6,878,678 B2
• Time in Patent Office: Days
• US Class Current: 508/486
• CPC Class Codes: C10M 129/74 of polyhydroxy compounds
• CPC Class Codes: C10M 129/76 containing free hydroxy or carboxyl groups
• CPC Class Codes: C10M 169/044 the additives being a mixture of non-macromolecular and macromolecular compounds
• CPC Class Codes: C10M 2203/1025 used as base material
• CPC Class Codes: C10M 2207/027 Neutral salts thereof
• CPC Class Codes: C10M 2207/283 of polyhydroxy compounds
• CPC Class Codes: C10M 2207/289 containing free hydroxy groups
• CPC Class Codes: C10M 2209/084 Acrylate; Methacrylate
• CPC Class Codes: C10M 2215/28 Amides; Imides
• CPC Class Codes: C10M 2223/04 Phosphate esters
• CPC Class Codes: C10N 2030/06 Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
• CPC Class Codes: C10N 2040/042 for automatic transmissions

Abstract

To provide an oil composition for automatic transmission having high wet friction torque capacity and shudder preventing performance, and excellent also in durability of shudder preventing performance as an automatic transmission oil for lock-up clutch and slip control.

Claims

1. An oil composition for automatic transmission comprising a carboxylic glyceride mixed in a base oil, the carboxylic glyceride consisting of a carboxylic triglyceride and/or a carboxylic diglyceride, each carboxylic acid residue thereof having a carbon number of 7 to less than 17, and the mixing amount thereof being 0.01 wt % or more, based on the whole composition.