Eastman-kodak Company

Kodak Polychrome Graphics, Gmbh

James C Fleming

Jeffrey W Leon

Anthony Adin

Derek D Chapman

Ramanuj Goswami

Kevin W Williams

Michael R Detty

David A Stegman

Csaba A Kovacs

Elizabeth G Burns

Gary M Underwood

Charles D DeBoer

Mark Lelental

Franklin D Saeva

Thap DoMinh

Donald R Preuss

John W Boettcher

Michael J Lindstrom

Michael P Cunningham

Joseph W Manthey

Gerald R Lange

Ralph T Brongo

Stanley W Cowen

An imaging member, such as a negative-working printing plate or on-press cylinder, can be prepared with a hydrophilic imaging layer comprised of a heat-sensitive hydrophilic polymer having ionic moieties and an infrared radiation sensitive dye having multiple sulfo groups. The heat-sensitive polymer and IR dye can be formulated in water or water-miscible solvents to provide highly thermal sensitive imaging compositions. In the imaging member, the polymer reacts to provide increased hydrophobicity in areas exposed to energy that provides or generates heat. For example, heat can be supplied by laser irradiation in the IR region of the electromagnetic spectrum. The heat-sensitive polymer is considered &ldquo;switchable&rdquo; in response to heat, and provides a lithographic image without wet processing.

Thermal imaging composition and member containing sulfonated IR dye and methods of imaging and printing

An imaging member, such as a negative-working printing plate or on-press cylinder, can be prepared using a hydrophilic imaging layer comprised of a heat-sensitive hydrophilic polymer that comprises recurring units comprising quaternary ammonium carboxylate groups. The imaging member can also include an infrared radiation sensitive material to provide added sensitivity to heat that can be supplied by laser irradiation in the IR region. The heat-sensitive polymer is considered &ldquo;switchable&rdquo; in response to heat, and provides a lithographic image without wet processing.

Imaging member containing heat switchable polymer and method of use

An imaging member, such as a negative-working printing plate or on-press cylinder, can be prepared with a hydrophilic imaging layer comprised of a heat-sensitive hydrophilic polymer having ionic moieties and an infrared radiation sensitive dye having multiple quaternary ammonium groups. The heat-sensitive polymer and IR dye can be formulated in water or water-miscible solvents to provide highly thermal sensitive imaging compositions. In the imaging member, the polymer reacts to provide increased hydrophobicity in areas exposed to energy that provides or generates heat. For example, heat can be supplied by laser irradiation in the IR region of the electromagnetic spectrum. The heat-sensitive polymer is considered &ldquo;switchable&rdquo; in response to heat, and provides a lithographic image without wet processing.

Thermal switchable composition and imaging member containing cationic IR dye and methods of imaging and printing

An imaging member, such as a negative-working printing plate or on-press cylinder, can be prepared with a hydrophilic imaging layer comprised of a heat-sensitive hydrophilic polymer having ionic moieties and a polymer grafted carbon as a photothermal conversion material. The heat-sensitive polymer and polymer grafted carbon can be formulated in water or water-miscible solvents without agglomeration. In the imaging member, the polymer reacts to provide increased hydrophobicity in areas exposed to energy that provides or generates heat. For example, heat can be supplied by laser irradiation in the IR region of the electromagnetic spectrum. The heat-sensitive polymer is considered &ldquo;switchable&rdquo; in response to heat, and provides a lithographic image without wet processing.

Processless direct write imaging member containing polymer grafted carbon and methods of imaging and printing

The present invention discloses optical recording elements having optical recording layers containing tetra dyes. The dyes have metallized azo dianionic dye with cationic dye counterions. The recording layer has a thickness from 225 to 300 nm.

Thicker optical recording layers comprising a tetra dye having a metallized azo dianionic dye with cationic dye counterions

An imaging member, such as a negative-working printing plate, can be prepared using a hydrophilic heat-sensitive imaging layer comprised of a hydrophilic heat-sensitive, crosslinked vinyl polymer containing recurring organoonium groups. The imaging member can also include a photothermal conversion material such as carbon black or an infrared radiation absorbing dye. The heat-sensitive polymer has recurring units containing an organoammonium, organophosphonium or organosulfonium group that reacts to provide increased oleophilicity (ink receptivity) in response to heat. Heat is preferably generated by laser irradiation in the IR region of the electromagnetic spectrum. The heat-sensitive polymer is considered &ldquo;switchable&rdquo; in response to heat. The imaging member can be used in printing methods without the usual wet processing steps.

Processless direct write printing plate having heat sensitive crosslinked vinyl polymer with organoonium group and methods of imaging and printing

An imaging member, such as a negative-working printing plate, can be prepared using a hydrophilic imaging layer comprised of a heat-sensitive hydrophilic polymer having a positively charged moiety, and optionally a photothermal conversion material. The heat-sensitive polymer has recurring units containing an N-alkylated aromatic heterocyclic group or an organoonium group that reacts to provide increased oleophilicity in areas exposed to energy that provides or generates heat. For example, heat can be supplied by laser irradiation in the IR region of the electromagnetic spectrum. Thus, the heat-sensitive polymer is considered &ldquo;switchable&rdquo; in response to heat, and provides an imaging means without wet processing.

Processless direct write printing plate having heat sensitive positively-charged polymers and methods of imaging and printing

An imaging member, such as a negative-working printing plate or on-press cylinder, can be prepared with a hydrophilic imaging layer comprised of a heat-sensitive hydrophilic polymer having ionic moieties and an infrared radiation sensitive dye having multiple sulfo groups. The heat-sensitive polymer and IR dye can be formulated in water or water-miscible solvents to provide highly thermal sensitive imaging compositions. In the imaging member, the polymer reacts to provide increased hydrophobicity in areas exposed to energy that provides or generates heat. For example, heat can be supplied by laser irradiation in the IR region of the electromagnetic spectrum. The heat-sensitive polymer is considered 'switchable' in response to heat, and provides a lithographic image without wet processing.

Thermal imaging composition and member containing sulfonated ir dye and

The present invention discloses an optical recording element having, in the following order, a transparent substrate, a recording layer and a light reflecting layer wherein the recording layer

Optical recording elements having recording layers exhibiting reduced

An optical recording element is disclosed. The element has a transparent substrate and on the surface of said substrate, a recording layer and a light reflecting layer wherein recording layer comprises a mixture of a metallized formazan dye and cyanine dye and the unrecorded layer is such that the real part of the refractive index(n) at 780 nm is greater than 1.8 and the imaginary part (k) is less than 0.15. The metallized formazan dye has a k value of 0.00 to 0.02.

Optical recording elements having recording layers containing mixtures

A dye mixture having, at 780 nm, a real refractive index not less than 1.8, and an imaginary part not greater than 0.15 and comprising (a) a tetra dye having a metallized azo dianionic dye with a cationic dye counterion and (b) at least one other dye having the structure according to formula I: ##STR1## wherein: A may be equal to or different from A.sup.1, in which each represents an aryl group having 6 to 10 carbon atoms;

Tetra dye mixed with another dye or dyes for optical recording elements

An optical recording element comprising, in the following order, a transparent substrate bearing an optical recording layer containing a phthalocyanine dye and a gold reflective layer characterized in that the recording layer comprises sufficient sulfur or sulfur compound to prevent defects in the gold reflective layer.

Optical recording layers containing sulfur

There is disclosed a recordable optical element that includes a dye. The element has a substrate and on the surface of the substrate, a dye containing recording layer and a light reflecting layer. The dye is a leuco dye which upon exposure to a thermally-generated acid becomes an absorption dye.

Recordable optical element having a leuco dye

There is disclosed a recordable optical element that includes a dye. The element has a substrate and on the surface of the substrate, a dye containing recording layer and a light reflecting layer. The improvement is that the dye is a leuco dye.

Growing community of inventors

Webster, NY, United States of America

James C Fleming