Patent ID: 7601474

Claim:
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.