Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making printing plates
Patent
1979-12-26
1981-06-30
Brammer, Jack P.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making printing plates
430271, 430275, 430278, 430306, 101456, 101457, 101467, G03C 500
Patent
active
042763673
ABSTRACT:
A lithographic printing plate in which the oleophilic imaging areas are formed as a thin cross-linked block copolymer film adhered to the hydrophilic surface of a backing plate. The block copolymer comprises blocks of copolyacrylate and polyurethane wherein the copolyacrylate blocks are a copolymer of a hydroxy-containing acrylate and a second acrylate component comprising one or more esters of acrylic acid or methacrylic acid or mixtures thereof and the polyurethane blocks are formed of polyoxybutylene as the prepolymer component. In forming the printing plate the block copolymer is deposited as a thin film containing an ultraviolet initiator and a cross linking promoter and the cross-linked imaging areas are formed by exposure to ultraviolet radiation.
REFERENCES:
patent: 3035004 (1962-05-01), Giavis
patent: 3459790 (1969-08-01), Smith
patent: 3493500 (1970-02-01), Volk et al.
patent: 3932401 (1976-01-01), Berg et al.
patent: 3960572 (1976-01-01), Ibata et al.
Massucco Arthur A.
Merrill Richard E.
Arthur D. Little Inc.
Brammer Jack P.
Lepper Bessie A.
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