Conductive rubber elastic material, charging member and electrophotographic apparatus
US8491994B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2012 |
| Grant date | Jul 23, 2013 |
| Priority date | — |
| Expiry date | May 14, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31931
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A conductive rubber elastic material is stably provided which can produce a charging member that may less vary in electrical resistance even with changes in applied voltage, promises uniform electrical properties, has charge characteristics not affected by changes in environments such as temperature and humidity, and enables a charging object member such as a photosensitive member to be kept from being contaminated. It is a conductive rubber elastic material which contains a matrix containing at least one ionically conductive rubber selected from the group consisting of epichlorohydrin rubber, epichlorohydrin-ethylene oxide rubber, epichlorohydrin-ethylene oxide-allyl glycidyl ether rubber, acrylonitrile-butadiene rubber and a hydrogenated product of acrylonitrile-butadiene rubber and domains composed of an electronically conductive rubber material containing i) a rubber having a butadiene skeleton and ii) carbon black, and the rubber having a butadiene skeleton is modified at a molecular terminal thereof with a specific atomic group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.