Lubricant compositions comprising thiophosphoric acid esters and dithiophosphoric acid esters

US6531429B2 · kind B2 · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• Michael Fletschinger · Bad Krozingen, DE
• Peter Rohrbach · Remchingen, DE
• Peter Collen Hamblin · Winnipeg, CA
• Dudley Clark · Breitenbach, CH
• Marc Ribeaud · Delémont, CH

Key dates

• Filing date: Aug 17, 2001
• Grant date: Mar 11, 2003
• Expiry date: Aug 17, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10N2050/10
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to improved compositions comprising thiophosphoric acid esters and dithiophosphoric acid esters or phosphoric acid thioesters and oil additives from the group of the polyol partial esters, amines and epoxides, and also to the use of those lubricant compositions in improving the performance properties of lubricants, such as greases, metal-working fluids, gear fluids or hydraulic fluids. Thiophosphoric acid esters and dithiophosphoric acid esters or phosphoric acid thioesters are present in the compositions preferably in a concentration of less than 400 ppm.