Patent · US Expired

Photosensitive article having polyaldehydes and its use in photoimaging

US4150989A · kind A · utility

7Cited by

5References

13Claims

0Family size

Assignee

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

Inventors

William Chambers · Wilmington, US
Robert P. Foss · Hockessin, US

Key dates

Filing date	Oct 6, 1977
Grant date	Apr 24, 1979
Priority date	—
Expiry date	Oct 6, 1997

Classification

Technology area (CPC G)Physics
CPC primaryG03F7/039
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Photosensitive polyaldehydes are provided which have the formula: ##STR1## wherein R is a photosensitive end group selected from ##STR2## R.sup.1 is H or n-alkyl of 1-5 carbon atoms, preferably H, R.sup.2 is (a) n-alkanoyl of 1-4 carbon atoms or (b) n-alkanoyl of 1-4 carbon atoms or ##STR3## when R.sup.1 is H, and N IS A POSITIVE INTEGER OF ABOUT 10-4000. The polyaldehydes are prepared by the anionic polymerization of the appropriate aldehyde with an initiating amount of an alkali metal or tetraalkylammonium alkoxide of RO in the above formula. The polyaldehydes are useful in articles and methods of relief imaging and in lithographic plates.

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