Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Patent
1999-08-31
2000-12-12
Baxter, Janet
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
430964, 430944, 430905, 4302711, 4302781, 430926, G03C 173, G03C 176, G03C 177
Patent
active
061596574
ABSTRACT:
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.
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Research Disclosure, Item 19201, Apr. 1980.
Fleming James C.
Leon Jeffrey W.
Stegman David A.
Williams Kevin W.
Baxter Janet
Eastman Kodak Company
Lee Sin J.
Tucker J. Lanny
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