| US 7,456,138 B2 | ||
| Functional fluids containing alkylene oxide copolymers having low pulmonary toxicity | ||
| John V. Sherman, Canton, Mich. (US); Ludwig Voelkel, Limburgerhof (Germany); Marc Walter, Frankenthal (Germany); Christian Wulff, Mannheim (Germany); Michael Stoesser, Neuhofen (Germany); and Siegbert Brand, Speyer (Germany) | ||
| Assigned to BASF Aktiengesellschaft, Ludwigshafen (Germany) | ||
| Filed on May 14, 2004, as Appl. No. 10/845,353. | ||
| Prior Publication US 2005/0256014 A1, Nov. 17, 2005 | ||
| Int. Cl. C10M 107/34 (2006.01); C10M 173/02 (2006.01) | ||
| U.S. Cl. 508—579 [508/513] | 32 Claims |
| 1. A method of reducing the inhalation toxicity of functional fluids, comprising:
incorporating into a functional fluid an effective amount of a copolymer which is obtainable by copolymerizing ethylene oxide,
propylene oxide and/or butylene oxide with a monool initiator, said copolymer having a degree of unsaturation of less than
about 0.01 meq/g, wherein the monool initiator is n-butanol or a polyoxyalkylene monoether thereof containing from 1 to 20
oxyalkylene units.
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