Gm Global Technolgoy Operations, Inc.

Charlene A Hayden

Tao Xie

Belabbes Merzougui

Andrew Mark Mance

Anthony L Smith

John C Ulicny

Mark A Golden

Methods for synthesizing dimeric or polymeric reaction products of nitrogen aromatics comprise contacting a composition comprising the nitrogen aromatic with a catalyst composition. The catalyst comprises a first metal substrate having a second reduced metal coated on the substrate.

Method for making nitrogen aromatic oligomers and polymers

Methods for synthesizing dimeric or higher polymeric reaction products of nitrogen aromatics comprise contacting a composition comprising the nitrogen aromatic with a catalyst composition. The catalyst is in particulate form and comprises a first metal substrate having a second reduced metal coated on the substrate.

One embodiment of the invention includes an MR fluid of improved durability. The MR fluid is particularly useful in devices that subject the fluid to substantial centrifugal forces, such as large fan clutches. A particular embodiment includes a magnetorheological fluid including a liquid, magnetizable particles, a stearate and a thiophosphate.

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Bloomfield Hills, MI, United States of America

Charlene A Hayden