Electrorheological fluid with improved properties comprising composite polymer
US5558803A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1994 |
| Grant date | Sep 24, 1996 |
| Priority date | — |
| Expiry date | Dec 22, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/185
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An electrorheological fluid comprising dielectric particles and an insulating liquid and characterized by exhibiting a viscosity of not more than 0.2 Pa.cndot.s at a shear rate of 33/s when measured at 25.degree. C. in the absence of supply of an electric field and a structural viscosity satisfying the condition of the formula (1): EQU 0.01 Pa.cndot.s.ltoreq..eta..sub.1 -.eta..sub.2 .ltoreq.0.5 Pa.cndot.s (1) wherein .eta..sub.1 is a viscosity in at a shear rate of 3.3/s when measured at 25.degree. C. in the absence of supply of an electric field and .eta..sub.2 is a viscosity in at a shear rate of 33/s when measured at 25.degree. C. in the absence of supply of an electric field. This electrorheological fluid generates a large shear stress, exhibits an excellent current property and an excellent durability, and excels particularly in dispersion stability, redispersibility and fluidity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.