Patent · US Expired

Photosensitive leuco dye containing electrostatic master with printout image

US4945020A · kind A · utility

9Cited by

6References

42Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Richard J. Kempf · Towanda, US
Rolf Dessauer · Wilmington, US
Steven C. Freilich · Wilmington, US

Key dates

Filing date	Jun 30, 1989
Grant date	Jul 31, 1990
Priority date	—
Expiry date	Jun 30, 2009

Classification

Technology area (CPC G)Physics
CPC primaryG03G5/026
WIPO fieldOptics
WIPO sectorInstruments

Abstract

High resolution, photosensitive electrostatic master which is positive-working with a single imagewise exposure comprising a conductive support bearing a layer of a photosensitive composition consisting essentially of (A) at least one polymeric binder, (B) a hexaarylbiimidazole photooxidant, (C) leuco dye, preferably stabilized, oxidized by (B), (D) a nonionic halogenated compound, preferably a hydrocarbon, and (E) compatible plasticizer. A process of making positive images by a single imagewise exposure is described. The master is useful in making proofs that duplicate the image achieved by printing, etc.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.