Electrically conductive elastomer
US5286566A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 1993 |
| Grant date | Feb 15, 1994 |
| Priority date | — |
| Expiry date | Aug 31, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31605
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrically conductive polyurethane elastomer obtained by the reaction of a polytetramethylene ether glycol having the formula HO[(CH.sub.2).sub.4 O].sub.x H where x is from 8 to 41 and from about 20 to about 95 parts by weight per 100 parts by weight of said glycol of at least one diisocyanate, a sufficient amount of chain extender and cross linking agents to provide a crosslinked elastomer and an amount of an asymmetric ionic quarternary ammonium salt having the formula: ##STR1## where R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are C.sub.n H.sub.2n+1 and 1.ltoreq.n.ltoreq.25 sufficient to provide a D.C. volume resistivity of from about 10.sup.7 to about 10.sup.11 ohm cm. In a preferred embodiment the asymmetric ionic quarternary ammonium salt is hexadecyl ethyl dimethyl ammonium ethyl sulfate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.