EP 0114300 B1 19870415 - LIQUID DEVELOPER FOR THE DEVELOPMENT OF ELECTROSTATIC CHARGE IMAGES, AND PROCESS FOR ITS PRODUCTION
Title (en)
LIQUID DEVELOPER FOR THE DEVELOPMENT OF ELECTROSTATIC CHARGE IMAGES, AND PROCESS FOR ITS PRODUCTION
Publication
Application
Priority
DE 3247925 A 19821224
Abstract (en)
[origin: US4526852A] The invention relates to a liquid developer with negatively charged toner particles for developing electrostatic charge images. It is composed of a carrier liquid of high electric resistivity and low dielectric constant, pigments or dyes, a binder, a dispersing agent and a charge control agent, such as an N-vinylpyrrolidone-containing polymer, a waxy substance and conventional additives. The liquid developer additionally contains at least one wax which is readily soluble in the carrier liquid at increasing temperatures, but difficultly soluble at room temperature, which reduces the specific electric conductivity of the liquid developer and which has a softening point within a range of from about 50 DEG to 120 DEG C. and an acid number of from about 0 to 200.
IPC 1-7
IPC 8 full level
G03G 9/12 (2006.01); G03G 9/13 (2006.01); G03G 9/135 (2006.01)
CPC (source: EP US)
G03G 9/131 (2013.01 - EP US); G03G 9/135 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
DE 3247925 A1 19840628; AU 2271883 A 19840628; AU 557423 B2 19861218; DE 3371007 D1 19870521; EP 0114300 A1 19840801; EP 0114300 B1 19870415; JP S59133561 A 19840731; US 4526852 A 19850702
DOCDB simple family (application)
DE 3247925 A 19821224; AU 2271883 A 19831221; DE 3371007 T 19831215; EP 83112605 A 19831215; JP 24234983 A 19831223; US 56201383 A 19831216