US 12,066,790 B2
Styrene-acrylate toner composition
Jordan A. Frank, Rochester, NY (US); Daniel W. Asarese, Honeoye Falls, NY (US); Chieh-Min Cheng, Rochester, NY (US); Paul K. Acquaviva, Penfield, NY (US); Richard P. N. Veregin, Mississauga (CA); and Michael F. Zona, Webster, NY (US)
Assigned to Xerox Corporation, Norwalk, CT (US)
Filed by Xerox Corporation, Norwalk, CT (US)
Filed on Feb. 4, 2021, as Appl. No. 17/167,430.
Prior Publication US 2022/0244656 A1, Aug. 4, 2022
Int. Cl. G03G 9/087 (2006.01); G03G 9/08 (2006.01); G03G 9/09 (2006.01); G03G 9/093 (2006.01)
CPC G03G 9/09364 (2013.01) [G03G 9/081 (2013.01); G03G 9/08711 (2013.01); G03G 9/08782 (2013.01); G03G 9/0904 (2013.01); G03G 9/0918 (2013.01); G03G 9/09321 (2013.01)] 16 Claims
 
1. A toner comprising:
toner particles comprising a core and a shell thereover;
wherein the core comprises a first core styrene-acrylate copolymer and a second core styrene-acrylate copolymer; a wax; and an optional colorant;
wherein the first core styrene-acrylate copolymer is a styrene-n-butylacrylate-β-carboxyethylacrylate copolymer having a weight average molecular weight of from about 32,000 g/mol to about 38,000 g/mol and an onset glass transition temperature of from about 57.0° C. to about 61.0° C.;
wherein the second core styrene-acrylate copolymer is a styrene-n-butylacrylate-β-carboxyethylacrylate copolymer having a weight average molecular weight of from about 52,000 g/mol to about 58,000 g/mol and an onset glass transition temperature of from about 53.0° C. to about 57.0° C.; and
wherein the shell comprises a single styrene-acrylate copolymer;
wherein the single shell styrene-acrylate copolymer is the first styrene-n-butylacrylate-β-carboxyethylacrylate copolymer having a weight average molecular weight of from about 32,000 g/mol to about 38,000 g/mol and an onset glass transition temperature of from about 57.0° C. to about 61.0° C.