Functional fluids containing alkylene oxide copolymers having low pulmonary toxicity

US7456138B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• John V. Sherman · Allen Park, US
• Ludwig Voelkel · Schifferstadt, DE
• Marc Walter · Bischofswerda, DE
• Christian Wulff · Mannheim, DE
• Michael Stoesser · Schifferstadt, DE
• Siegbert Brand · Birkenheide, DE

Key dates

• Filing date: May 14, 2004
• Grant date: Nov 25, 2008
• Expiry date: Jul 31, 2025

Classification

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

Abstract

The invention relates to a method of reducing the inhalation toxicity of functional fluids by incorporating into a functional fluid an effective amount of copolymer which is obtainable by copolymerizing etheylene oxide, propylene oxide and/or butylenes oxide with an initiator monool or diol, said copolymer having a degree of unsaturation of less than about 0.01 meq/g.