Patent · US Expired

Photohardenable electrostatic master having improved backtransfer and charge decay

US4818660A · kind A · utility

4Cited by

3References

47Claims

0Family size

Assignee

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

Inventors

Graciela Beatriz Blanchet-Fincher · Wilmington, US
Curtis R. Fincher, Jr. · Wilmington, US
Lawrence Cheung · Berwyn, US
Rolf Dessauer · Wilmington, US
Catharine E. Looney · Wilmington, US

Key dates

Filing date	Nov 4, 1987
Grant date	Apr 4, 1989
Priority date	—
Expiry date	Nov 4, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S430/116
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Photohardenable electrostatic master comprising an electrically conductive substrate, e.g., aluminized polyethylene terephthalate, bearing a layer of a photopolymer comprising an organic polymeric binder, compound having at least one ethylenically unsaturated group, photoinitiator, an aromatic amino compound, as defined, and an acid, e.g., p-toluene sulfonic acid, or an oxidized substituted aromatic amino compound. The photohardenable electrostatic master having improved charge decay and backtransfer is used for electrostatic proofing, etc.

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