公开(公告)号：US20040135114A1

公开(公告)日：2004-07-15

申请号：US10342940

申请日：2003-01-15

Applicant: Delphi Technologies, Inc.

Inventor： Vardarajan R. Iyengar ,  Thad J. Kacsandy

IPC: H01F001/22

CPC classification number: H01F1/447

Abstract: A magnetorheological fluid formulation comprising magnetizable particles dispersed in a non-aqueous, glycol-based liquid vehicle thickened effectively by either a fully treated fumed silica or an organoclay. The surface treated fumed silica is fully treated with a treatment molecule having a molecular weight of at least about 200. The organoclay comprises sepiolite and/or palygorskite. The glycol-based fluid advantageously consists essentially of propylene glycol and optionally ethylene glycol.