Resinous microparticles useful in powdery toner for electrophotography
US4968576A · kind A · utility
2Cited by
10References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 17, 1989 |
| Grant date | Nov 6, 1990 |
| Priority date | — |
| Expiry date | Jan 17, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/909
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Resinous microparticles useful in toner for electrophotography which are made of vinyl resin obtained by emulsion polymerization of at least one .alpha.,.beta.-ethylenically unsaturated monomers in the presence of cationic surfactant having an onium salt structure and a polymerization initiator having an amidine or amidine salt structure and whose average particle diameter is in a range of from 0.01 to 1.mu., and toner composition comprising toner particles and resinous microparticles as abovementioned are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.