Electroviscous fluids
US4502973A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 3, 1983 |
| Grant date | Mar 5, 1985 |
| Priority date | — |
| Expiry date | Feb 3, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/0008
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Electroviscous (EV) fluids consisting of solid hydrophilic particles dispersed in hydrophobic liquids, where the liquid contains a diaryl derivative component of general formula I ##STR1## in which R is CY.sub.2,O,S,SO,SO.sub.2,SiF.sub.2, or O--SiY.sub.2 --O,X.sup.1 and X.sup.2 are halogens, (m+n) is between 1 and 3 on average, and (p+q) is between 0 and 1 on average. EV fluids containing these novel components possess generally improved properties in terms of lower viscosities, electrical conductivities, toxicities and freezing points. In a preferred embodiment, the component is a mixture of brominated diphenyl methanes in which R is CH.sub.2,n=O,X.sup.1 =Br,(m+n) is approximately one, and (p+q)=0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.