Electrophotographic toner composition
US4507376A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1983 |
| Grant date | Mar 26, 1985 |
| Priority date | — |
| Expiry date | Jul 15, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/105
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrophotographic toner composition having excellent blocking resistance and offset resistance which contains as a resin binder a polymeric rosin compound having a softening point of 50.degree. to 190.degree. C., a glass transition temperature of 10.degree. to 170.degree. C. and a molecular weight of 2,000 to 40,000 prepared by the reaction of (a) a glycidyl ester of rosin, (b) a dicarboxylic acid or its anhydride, and (c) a crosslinking agent selected from the group consisting of a polyfunctional epoxy compound, a polycarboxylic acid having a valency of not less than 3 or its anhydride, and a polyhydric alcohol having a valency of not less than 3. A dihydric alcohol may be used in the above reaction in order to improve the low temperature fixing property of the toner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.