Toner and heat-fixing method
US6808852B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2002 |
| Grant date | Oct 26, 2004 |
| Priority date | — |
| Expiry date | Nov 11, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G13/20
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner characterized by improved fixing performances with no or minimum oil application is formed of: (i) a binder resin, (ii) a colorant, (iii) a hydrocarbon wax, (iv) a resin composition formed by copolymerization of a styrenic monomer together with at least one of nitrogen-containing vinyl monomers, carboxyl group-containing monomers, hydroxyl group-containing monomers and (meth)acrylate ester monomers, in the presence of a hydrocarbon unit; and (v) an organometallic compound. The binder resin (i) comprises a polyester component in a proportion of at least 60 wt. % of the binder resin. The toner has a GPC molecular weight distribution including a weight-average molecular weight (Mw) of at least 4.0×104 an a ratio Mw/Mn of at least 50 between the Mw and a number-average molecular weight (Mn).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.