Lithoplates of quaternary ammonium salt compositions

Details Lithoplates of quaternary ammonium salt compositions Lithoplates of quaternary ammonium salt compositions

1978-08-07

1980-05-13

Kimlin, Edward C.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making printing plates

430309, 430324, 430526, 427304, 427437, G03F 702, G03C 194

Patent

active

042026997

ABSTRACT:
A radiation sensitive composition comprises a quaternary ammonium salt and a chemical sensitizer of the formula ##STR1## wherein R.sup.21 is aryl, arylalkenyl or arylalkyl, R.sup.22 is aryl, alkyl, arylalkenyl, arylalkyl, carboxylic acid or salt, or hydrogen and X is carboxylic acid or salt. The quaternary ammonium salt is of the type which will accept at least one electron on exposure to radiation to form a substance capable of causing metal to be deposited onto said substance from an electroless plating solution in contact with said substance and comprising a salt of said metal and a reducing agent. A radiation sensitive plate comprises a metallic substrate coated with a radiation sensitive layer comprising a quaternary ammonium salt. The layer may be formed of the above composition. A lithographic printing plate is produced by image-wise exposing the plate, contacting the plate with an electroless plating solution and, if necessary, rendering the resultant image areas more oleophilic and the resultant non-image areas more hydrophilic.

REFERENCES:
patent: 3316093 (1967-08-01), Cerwonka
patent: 3671250 (1972-06-01), Andrews et al.
patent: 3954471 (1976-05-01), Andrews et al.

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