RESIN COMPOSITION FOR ELECTROPHOTOGRAPHY

摘要

PURPOSE:To prevent offset without adding an offset inhibitor and to enable fixing at a lower fixing temp. by blending 80.00-99.95wt% binding resin with 0.05-20.00wt% liq. polybutadiene. CONSTITUTION:A copolymer preferably consisting of 20.00-100.00 parts by weight of styrene and/or a styrene deriv. and 80.00-0 part of at least one kind of (meth)acrylic acid or (meth)acrylic ester is used as a binding resin. This binding resin is combined optionally with other binder and blended with liq. polybutadiene which is a polymer of butadiene showing flowability at >=-10 deg.C to obtain a resin composition for a developer. A copolymer consisting of 70.00-99.95wt% butadiene and 0.05-30.00wt% acrylonitrile is preferably used in place of the liq. polybutadiene. A dry developer composition for electrophotography for heat and pressure fixing consisting essentially of these binding resins and a colorant, can be obtained. Another binder may be jointly used as a main component of the binder to the copolymer of the resin composition for the developing agent, if needed.