| US 7,601,474 B2 | ||
| Electrostatic toner composition to enhance copy quality by improved fusing and method of manufacturing same | ||
| Kenzo Ogata, Virginia Beach, Va. (US); and Shinichi Saiki, Virginia Beach, Va. (US) | ||
| Assigned to Mitsubishi Kagaku Imaging Corporation, Chesapeake, Va. (US) | ||
| Appl. No. 10/526,230 PCT Filed Sep. 09, 2003, PCT No. PCT/US03/25852 § 371(c)(1), (2), (4) Date Mar. 01, 2005, PCT Pub. No. WO2004/023215, PCT Pub. Date Mar. 18, 2004. |
||
| Claims priority of provisional application 60/408878, filed on Sep. 09, 2002. | ||
| Prior Publication US 2005/0244735 A1, Nov. 03, 2005 | ||
| Int. Cl. G03G 9/00 (2006.01) | ||
| U.S. Cl. 430—108.8 [430/123.5; 430/123.53; 430/124.1] | 15 Claims |
| 1. An electrostatic developer, comprising:
toner-containing image-forming particles and an uncrosslinked, linear hydrocarbon based homopolymer wax,
wherein said wax has a total number of branches in each of one or more chains that is less than 0.5%, relative to a total
number of carbons in said wax,
wherein said wax has a set of endotherm peaks as determined by differential scanning calorimetry (DSC) run at a maximum rate
of 10° C. per minute at increasing temperature, said endotherm peaks including a primary endotherm peak and at least a secondary
endotherm peak, said primary endotherm peak in a temperature range of between 70° C. and 90° C. and said secondary endotherm
peak in a temperature range of between 95° C. and 110° C.;
wherein said wax has a crystallinity of from 78 to 82% as determined by small angle X-ray diffraction analysis;
wherein said wax has a molecular weight polydispersity (Mw/Mn) in the range of 1.1-1.3, wherein the number average molecular
weight, Mn, is in the range of 700-790 and the weight average molecular weight, Mw, is in the range of 890-1000; and
wherein said wax has the following branching:
0-0.20 methyl branches per 100 carbon atoms,
0-0.10 ethyl branches per 100 carbon atoms and
0-0.10 butyl branches per 100 carbon atoms.
|