Patent ID: 6238835
Filing Date: 2001-05-29
Classification: G03G

Abstract:
Dry toner particles comprising a resinous matrix and a wax, wherein:said resinous matrix contains a mixture ofa linear polymer (LPC) with weight average molecular weight (Mw) between 2,000 and 20,000, a tg.delta.>3 at 120.degree. C. and 100 rad/sec and a low softening point T.sub.sLPC such that 90.degree. C..ltoreq.T.sub.sLPC.ltoreq.120.degree. C., modified by a modifier (D) selected from the arc consisting of long chain aliphatic compounds with a reactive end group and having between 20 and 250 carbon atoms and a polysiloxane to form polymer A, said modifier and said polymer being present in a molar ratio LPC/D between 0.8 and 1.25 anda non-linear polymer B with a softening point T.sub.sB such that 110.degree. C..ltoreq.T.sub.sBz.ltoreq.135.degree. C. making up at least 25% by weight of said resinous matrix, andsaid wax C has a melting point Mp so that 85.degree. C..ltoreq.M.sub.p.ltoreq.135.degree. C. and M.sub.p.ltoreq.T.sub.sB +10.