White toner
US11194260B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 2020 |
| Grant date | Dec 7, 2021 |
| Priority date | — |
| Expiry date | May 11, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/0902
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A white toner including toner particles each of which contains a binder resin and a white pigment whose content is 20 to 80 mass % or less, wherein the binder resin contains a polymer A having a first and a second monomer unit, wherein the content of the first monomer unit is 5.0 to 60.0 mol % with respect to the total number of moles of all monomer units in the polymer A, wherein the content of the second monomer unit is 20.0 to 95.0 mol % with respect to the total number of moles of all the monomer units in the polymer A, wherein the SP value of the first monomer unit and the SP value of the second monomer unit satisfy specific relations, and wherein the white pigment has a total amount of a surface acidic group amount and a surface basic group amount of 60 μmol/g or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.