Patent ID: 9164410
Filing Date: 2015-10-20
Classification: G03G

Abstract:
1. A composition having particles comprising: a resin; an optional wax; a colorant; a surface additive comprising a mixture of: a hexamethyldisilazane (HMDS) surface treated silica, a sol-gel silica that is not surface treated, and a polydimethylsiloxane (PDMS) surface treated silica; and an organic spacer comprising melamine and polymethylmethacrylate (PMMA); wherein the weight ratio of the HMDS surface treated silica to the sol-gel silica to the PDMS silica is in a range of from about 0.45:0.15:2.3 to about 0.75:0.25:2.7 and the weight ratio of melamine to PMMA is in a range of from about 0.05:0.40 to about 0.15:0.60.