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US 6,100,006 AGranted
Peel-apart photosensitive elements and their process of use
AssigneeE. I. Du Pont de Nemours and Company
InventorsHarvey Walter Taylor, Jr., Gregory Charles Weed
Life of this patent
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Abstract
A peel-apart photosensitive element comprising in order: a strippable cover sheet; a photosensitive layer; an essentially non-photosensitive, non-tacky organic layer comprised of block or random polymers of at least one aromatic polymer and at least one non-aromatic monomer; and a support, wherein the photosensitive layer has a lowered peel force in relation to the cover sheet after exposure to actinic radiation.
Claims15
A process for forming a prepress proof comprising, in order:
- (I) providing a photosensitive element comprising in order, from top to bottom:
- (1) a strippable cover sheet which is transparent to actinic radiation;
- (2) a photosensitive layer;
- (3) an essentially non-photosensitive, non-tacky organic layer comprising a polymer selected from the group consisting of:
- (a) structured block or random polymers prepared from at least one aromatic monomer and at least one monomer selected from the group consisting of ethylene, propylene, butylene, isobutylene, butene, 1,4-hexadiene, and vinyl acetate;
- and
- (b) reaction products of random polymers prepared from at least one aromatic monomer and at least one monomer selected from the group consisting of ethylene, propylene, and butylene with 2-butenedioic acid or cyclic anhydrides wherein the organic layer is soluble in toluene;
- and
- (4) a support sheet;
- (II) peeling off the support sheet and laminating the essentially non-photosensitive, non-tacky organic layer of the photosensitive element to a permanent support;
- (III) imagewise exposing the photosensitive element to actinic radiation through a color separation to form imaged and non-imaged areas;
- and
- (IV) developing the exposed photosensitive element by removing the cover sheet along with the exposed areas of the photosensitive layer to form a right reading image on the permanent support.
10 more elements
Dependencies are inferred from the claim text.