Multi-layer negative working imageable element
AssigneeKodak Polychrome Graphies LLC
InventorsKevin Ray, Joanne Ray
Life of this patent
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Abstract
Multi-layer, negative working imageable elements useful as lithographic printing plate precursors are disclosed. The elements contain, in order, a support; an underlayer; and an imageable layer. The imageable layer comprises a negative working imageable composition; and the underlayer is soluble or dispersible in a developer. Elements that can be imaged with ultraviolet or visible radiation and elements that can be imaged with infrared radiation or with heat are disclosed.
Claims27
An imageable element comprising, in order:
- a support;
- an underlayer;
- and
- an imageable layer;
- in which:
- the underlayer comprises a photothermal conversion material;
- the imageable layer comprises a negative working imageable composition;
- the underlayer is soluble or dispersible in a developer;
- and
- the negative working imageable composition comprises a polymeric diazonium compound and a binder.
An imageable element comprising, in order:
- a support;
- an underlayer;
- and
- an imageable layer;
- in which:
- the underlayer comprises a photothermal conversion material;
- the imageable layer comprises a negative working imageable composition;
- the underlayer is soluble or dispersible in a developer;
- and
- the negative working imageable composition is a photopolymerizable composition.
An imageable element comprising, in order:
- a support;
- an underlayer;
- and
- an imageable layer;
- in which:
- the imageable layer comprises a negative working imageable composition;
- and
- the underlayer is soluble or dispersible in a developer;
- and
- the underlayer comprises a copolymer that comprises about 35 to about 60 mol % of N-phenylmaleimide, about 15 to about 40 mol % of methacrylamide, and about 10 to about 30 mol % of methacrylic acid.
A method for forming an image, the method comprising the steps of, in order:
- (A) imaging an imageable element and forming an exposed imageable element comprising exposed and unexposed regions, the imageable element comprising, in order:
- a support;
- an underlayer;
- and
- an imageable layer;
- in which:
- the imageable layer comprises a negative working imageable composition;
- the underlayer comprises a photothermal conversion material;
- the underlayer is soluble or dispersible in a developer;
- the negative working imageable composition comprises a monomer, a binder and a photoinitiator system activatable by ultraviolet or visible radiation;
- and
- imaging is carried out with ultraviolet or visible radiation;
- and
- (B) developing the exposed imageable element and removing the unexposed regions to form the image.
A method for forming an image, the method comprising the steps of, in order:
- (A) imaging an imageable element and forming an exposed imageable element comprising exposed and unexposed regions, the imageable element comprising, in order:
- a support;
- an underlayer;
- and
- an imageable layer;
- in which:
- the imageable layer comprises a negative working imageable composition;
- the underlayer comprises a photothermal conversion material;
- the underlayer is soluble or dispersible in a developer;
- the negative working imageable composition comprises a monomer, a binder and a thermally activatable initiator system;
- and
- imaging is carried out with infrared radiation or with heat;
- and
- (B) developing the exposed imageable element and removing the unexposed regions to form the image.
A method for forming an image, the method comprising the steps of, in order:
- (A) imaging an imageable element and forming an exposed imageable element comprising exposed and unexposed regions, the imageable element comprising, in order:
- a support;
- an underlayer;
- and
- an imageable layer;
- in which:
- the imageable layer comprises a negative working imageable composition;
- the underlayer comprises a photothermal conversion material;
- the underlayer is soluble or dispersible in a developer;
- the negative working imageable composition comprises a polymeric diazonium compound and a binder;
- and
- (B) developing the exposed imageable element and removing the unexposed regions to form the image.
An image useful as a lithographic printing plate prepared by a method comprising the steps of, in order:
- (A) imaging an imageable element and forming an exposed imageable element comprising exposed and unexposed regions, the imageable element comprising, in order:
- a support;
- an underlayer;
- and
- an imageable layer;
- in which:
- the imageable layer comprises a negative working imageable composition;
- the underlayer comprises a photothermal conversion material;
- the underlayer is soluble or dispersible in a developer;
- the negative working imageable composition comprises a monomer, a binder and a photoinitiator system activatable by ultraviolet or visible radiation;
- and
- imaging is carried out with ultraviolet or visible radiation;
- and
- (B) developing the exposed imageable element and removing the unexposed regions to form the image.
An image useful as a lithographic printing plate prepared by a method comprising the steps of, in order:
- (A) imaging an imageable element and forming an exposed imageable element comprising exposed and unexposed regions, the imageable element comprising, in order:
- a support;
- an underlayer;
- and
- an imageable layer;
- in which:
- the imageable layer comprises a negative working imageable composition;
- the underlayer comprises a photothermal conversion material;
- the underlayer is soluble or dispersible in a developer;
- the negative working imageable composition comprises a polymeric diazonium compound and a binder;
- and
- (B) developing the exposed imageable element and removing the unexposed regions to form the image.
Dependencies are inferred from the claim text.