Hydrophilic coating of salt-type phosphorus or sulfur polymer on

Details Hydrophilic coating of salt-type phosphorus or sulfur polymer on Hydrophilic coating of salt-type phosphorus or sulfur polymer on

1982-06-23

1984-01-24

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified backing or protective layer containing

148 627, 204 17, 204 35R, 204 35N, 204 38E, 204 58, 4273881, 427409, 430 49, 430 60, 430159, 430160, 430166, 430167, 430276, 430278, 430264, 430302, 430526, C23C 108, G03C 194, B41N 108

Patent

active

044277652

ABSTRACT:
The plate-, foil- or strip-shape support materials for offset printing plates are based on chemically, mechanically and/or electromechanically roughened aluminum, or on one of its alloys. Optionally, the aluminum may also have an aluminum oxide layer produced by anodic oxidation. One of the two surfaces the support material has a hydrophilic coating of at least one salt-type hydrophilic organic polymer which is a complex-type product obtained by reacting (a) a water-soluble organic polymer having acid functional groups containing phosphorus or sulfur (for example, polyvinylphosphonic or polyvinylsulfonic acid) with (b) a salt of an at least divalent metal cation.
In a process for manufacturing this support material, the complex-type reaction product, dissolved in an aqueous acid, is applied to at least one surface of the support material and the support material thus modified is dried. It is also possible, however, to produce the complex-type reaction product of the components (a) and (b) on the support material. The support material is used in the preparation of offset printing plates having a light-sensitive layer.

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Chemical Abstracts, vol. 93, #58253w (Bergchaeuser et al.).

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