Polymerische Teilchen, Herstellung nach einem Suspensionsverfahren mit kolloidaler Stabilisierung, polymerteilchenhaltiger Kapseltoner.

摘要

Polymeric particles comprising a core polymer covered by a layer of smaller copolymer particles and electrostatographic toners comprising such polymeric particles. A method of preparing such polymer particles having narrow size distribution in a suspension process employing a solid colloidal stabilizing agent. The solid colloidal stabilizer is a copolymer of 25 to 80% by weight, based on total monomer weight, of an addition polymerizable nonionic oleophilic monomer, 5 to 45%, by weight, of an addition polymerizable nonionic hydrophilic monomer, 1 to 50%, by weight, of an addition polymerizable ionic monomer, and 0 to 20 percent, by weight, of a crosslinking monomer having at least two addition polymerizable groups.