EP 0001103 B1 19810916 - LIQUID DEVELOPER AND APPROPRIATE CHARGE CONTROL AGENT
Title (en)
LIQUID DEVELOPER AND APPROPRIATE CHARGE CONTROL AGENT
Publication
Application
Priority
DE 2740870 A 19770910
Abstract (en)
[origin: US4243736A] This invention relates to an improvement in a liquid developer for the development of electrostatic charge images, comprising an electrically insulating carrier liquid in which pigments or dyestuffs, resinous binders, a polarity control agent, and conventional additives are dispersed or dissolved, the improvement that the polarity control agent is a copolymer which is soluble in the carrier liquid and is composed of 1 to 50 percent by weight of N-vinyl-2-pyrrolidone and 50 to 99 percent by weight of a methacrylic acid ester.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
G03G 9/131 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0001103 A1 19790321; EP 0001103 B1 19810916; AU 3967978 A 19800313; AU 518690 B2 19811015; DE 2740870 A1 19790322; DE 2861086 D1 19811203; JP S5451531 A 19790423; JP S649630 B2 19890217; US 4243736 A 19810106
DOCDB simple family (application)
EP 78100815 A 19780904; AU 3967978 A 19780908; DE 2740870 A 19770910; DE 2861086 T 19780904; JP 10846178 A 19780904; US 94060178 A 19780908