Toner for developing latent electrostatic images
US5244765A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1992 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Jul 13, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/0825
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner for developing latent electrostatic images which comprises a binder resin comprising a styrene polymer or a copolymer thereof, a releasing agent, dispersed in the above binder resin, comprising a low-molecular-weight polypropylene with a weight-average molecular weight of 3000 to 25000, and a coloring agent, dispersed in the above binder resin, with the styrene polymer or copolymer thereof being contained in a ratio of 10-50% and the low-molecular-weight polypropylene in a ratio of 5-60% at a surface portion of the above toner measured by the electron spectroscopy for chemical analysis (ESCA), and a maximum particle diameter of the low-molecular-weight polypropylene contained in the releasing agent being 5000 .ANG. or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.