Processless direct write printing plate having heat sensitive po

Details Processless direct write printing plate having heat sensitive po Processless direct write printing plate having heat sensitive po

1998-07-20

1999-07-13

Baxter, Janet

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making printing plates

101451, 101456, 101462, 101465, G03F 726, G03F 7032

Patent

active

059225122

ABSTRACT:
An imaging member, such as a negative-working printing plate, can be prepared using a heat sensitive imaging layer comprised of a heat-sensitive vinyl polymer and optionally a photothermal conversion material. The heat-sensitive polymer has recurring units containing a cyclic anhydride that decarboxylates upon application of thermal energy (such as from IR irradiation), rendering the polymer more hydrophobic in IR exposed areas. Upon contact with a neutral or acidic pH solution, the polymer is then rendered more hydrophilic in unexposed areas.

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