Waterless imageable element with crosslinked silicone layer
AssigneeKodak Polychrome Graphics LLC
InventorsSuck-Ju Hong, S. Peter Pappas
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Abstract
The present invention includes an imageable element, which includes a sheet substrate, an imaging layer and a silicone layer, which comprises a crosslinked silicone polymer. The crosslinked silicone polymer is the curing product of a vinyl functional polysiloxane copolymer and a hydrosiloxane compound. The curing is catalyzed by a platinum carbonyl complex. Upon imagewise exposure and development, an imaged element is obtained, which is mounted on a dry printing press containing lithographic ink and used to produce printed stock.
Claims47
An-A precursor for making an imageable element, comprising:
- a sheet substrate;
- an imaging layer on the substrate;
- and
- a crosslinkable layer overlying the imaging layer and comprising a vinyl functional polysiloxane copolymer having a molecular weight of at least 1,000 g/mol, a hydrosiloxane compound, wherein said curing is catalyzed by and a platinum compound having at least one carbonyl ligand and at least one non-carbonyl ligand.
A method of producing an imaged element comprising the steps of:
- coating a substrate with an imaging layer;
- applying over the imaging layer a curable composition comprising a vinyl functional polysiloxane copolymer having a molecular weight of at least 1,000 g/mol, a hydrosiloxane compound, and a platinum compound having at least one carbonyl ligand and at least one non-carbonyl ligand;
- and
- curing the composition to produce a silicone layer comprising a crosslinked silicone polymer;
- imagewise exposing said imaging layer to radiation to form an imaged layer having exposed areas and unexposed areas;
- and
- applying a developer liquid to said imaged layer;
- to produce an imaged element having ink receptive areas and ink repellent areas.
A crosslinkable composition comprising a vinyl functional polysiloxane copolymer having a molecular weight of at least 1,000 g/mol, a hydrosiloxane compound, and a platinum compound having at least one carbonyl ligand and at least one non-carbonyl ligand.
A method for making an imageable element, the imageable element comprising a sheet substrate, an imaging layer on the substrate, and a silicone layer overlying the imaging layer, the method comprising the steps of:
- coating a sheet substrate with an imaging layer;
- applying over the imaging layer a curable composition comprising a vinyl functional polysiloxane copolymer having a molecular weight of at least 1,000 g/mol, a hydrosiloxane compound, and a platinum compound having at least one carbonyl ligand and at least one non-carbonyl ligand;
- and
- curing the composition to produce a silicone layer comprising a crosslinked silicone polymer;
- to yield the imageable element.
An imageable element including a silicone layer exhibiting enhanced adhesion to a substrate, the imageable element comprising:
- a sheet substrate;
- an imaging layer on the substrate;
- and
- a crosslinked silicone layer overlying the imaging layer and comprising a platinum compound having at least one carbonyl ligand and at least one non-carbonyl ligand.
Dependencies are inferred from the claim text.