Liquid developer for use in electrophotography containing a terpolymer

Abstract

Abstract A LIQUID DEVELOPER FOR USE IN ELECTROPHOTOGRAPHY, COMPRISING A TONER DISPERSED IN A CARRIER LIQUID, SAID CARRIER LIQUID CONSISTING OF A HYDROCARBON HAVING A HIGH ELECTRIC RESISTANCE AND A LOW DIELECTRIC CONSTANT AND A SURFACE ACTIVE AGENT DISSOLVED IN SAID HYDROCARBON, SAID TONER BEING PREPARED BY HAVING A VINYL COPOLYMER GRAFT-BONDED ONTO THE PARTICLES OF A PIGMENT OR BY COATING THE PARTICLES OF THE PIGMENT WITH SAID VINYL COPOLYMER, SAID VINYL COPOLYMER CONSISTING OF A LEAST THREE VINYL MONOMRS OF THREE DIFFERENT TYPES SELECTED FROM THE FOLLOWNING THREE GROUPS, RESPECTIVELY, ONE (A) OF WHICH CONSISTING OF VINYL MONOMERS CONTAINING FUNCTIONAL RADICALS HAVING A HIGHLY INCREASED CHEMICAL AFFINITY TO SAID CARRIER LIQUID, THE SECOND GROUP (B) CONSISTING OF VINYL MONOMERS CONTAINING FUNCTIONAL RADICALS WHICH ARE CAPABLE OF CONTROLLING THE POLARITY OF THE PIGMENT EMPLLYED, AND THE LAST GROUP (C) CONSISTING OF VINYL MONOMERS CONTAINING FUNCTIONAL RADICALS WHICH ARE CAPABLE OF PRODUCING TIGHT ADHESION OR FIXING OF THE TONER TO THE LIGHT-SENSITIVE LAYER OF AN ELECTROPHOTOGRAPHIC COPYING MATERIAL.

Inventors

• 👤 Hazime Machida
• 👤 Zenjiro Okuno

Bibliographic Details