Process for making core-shell fluorinated particles and an overcoat layer comprising the same

摘要

The presently disclosed embodiments are directed generally to methods for making the core-shell fluorinated particles which are incorporated into the overcoat layers of an electrophotographic imaging member to reduce torque and cleaning failures during the photoreceptor cleaning process. The core-shell fluorinated particles are core-shell fluorinated nano- or micro-particles encapsulated in a melamine shell. The present embodiments also pertain to processes for making the overcoat layer comprising the core-shell fluorinated particles.

主权项

1. A process for preparing core-shell fluorinated particles comprised of a fluoro-polymer core having a polymeric shell, comprising:
a) mixing fluoro-polymer core particles in a solvent containing a hydroxyl-containing fluorinated dispersant and a curing agent to form a suspension; and b) performing polymerization of the curing agent on the surface of the core particles in the presence of an optional catalyst to form a polymeric shell around the fluoro-polymer core particles, wherein the hydroxyl-containing fluorinated dispersant has the following structure:wherein R represents an alkyl fluorocarbon group having from about 6 to about 30 carbon atoms.