Forming a toner using surfactant-free emulsion polymerization
US6458501B1 · kind B1 · utility
12Cited by
9References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1999 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Sep 30, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/115
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The latex of an emulsion aggregation toner is prepared without the use of a surfactant. The process comprises preparing an emulsion of monomers in water without a surfactant; adding a free radical initiator to at least a portion of the emulsion to initiate seed polymerization to form seed polymer, wherein the free radical initiator attaches to the seed polymer to form ionic, hydrophilic end groups on the seed polymer; and adding additional monomer to the composition to complete polymerization to form a latex polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.