Processes for the preparation of polymers
US5288585A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1992 |
| Grant date | Feb 22, 1994 |
| Priority date | — |
| Expiry date | Apr 23, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/0806
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process for the preparation of a toner composition which comprises (1) mixing a water soluble monomer or monomers, and an oil soluble monomer or monomers with polymerization initiators, a crosslinking component and a chain transfer component; (2) effecting bulk polymerization until from about 10 to about 40 weight percent of the water soluble and oil soluble monomer or monomers have been polymerized; (3) cooling the product obtained; (4) mixing with the aforesaid partially polymerized product components comprised of charge control agents, pigments, dyes, initiators, chain transfer agents and crosslinking agents to formulate a uniform organic phase; (5) dispersing the organic phase into from between about 2 to about 5 times its volume of water containing from between about 1 to about 5 weight percent of a stabilizing component to form a suspension with an average particle size of from between about 5 to about 25 microns and a particle size distribution of from about 1.1 to about; and (6) suspension polymerizing to complete the conversion of said monomer, or said monomers to polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.