Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making printing plates
Patent
1978-01-23
1981-02-03
Kimlin, Edward C.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making printing plates
430286, 430325, 430502, G03F 702
Patent
active
042489601
ABSTRACT:
A relief producing laminate having an over-lamina comprised of an unsaturated natural-like rubber composition characterized by relief differentiation in response to patterned radiation exposure and an under-lamina comprised of a resilient composition and adhered to the over-lamina. The term "natural-like rubber" as used herein includes both natural and synthetic rubbers which exhibit creep as a result of stress relaxation after being cast or formed.
The over-lamina is preferably a butadiene homopolymer or copolymer resin composition, more preferably a halogenated butadiene composition and most preferably a neoprene composition. The composition preferably includes a thiol, a monomer and a photoinitiator.
The under-lamina composition may be a woven textile or a polymer and is preferably a monoalkenyl aromatic-diene block copolymer resin composition. It is preferably radiation cured and preferably includes a monomer and a photoinitiator.
The under-lamina preferably comprises at least three juxtaposed layers, each layer being less highly cured than the juxtaposed under-layer and the over-lamina preferably comprises at least three juxtaposed layers with at least the layer closest to the under-lamina being more highly cured than the over-layers.
The invention also includes the stabilized plastic printing plate produced from the laminate and the method of radiation curing the laminate to produce the printing plate.
REFERENCES:
patent: 3240844 (1966-03-01), Gruver
patent: 3265765 (1966-08-01), Holden et al.
patent: 3627529 (1971-12-01), Frank et al.
patent: 3674486 (1972-07-01), Milgrom
patent: 3843502 (1974-10-01), Pearson et al.
patent: 3864229 (1975-02-01), Zapp et al.
patent: 4045231 (1977-08-01), Toda et al.
Bauer Steven E.
Hein Paul R.
Irvin Robert A.
Orem Roland L.
Yang Michael W.
Hanson, Jr. Edward J.
Kimlin Edward C.
Parker C. E.
W. R. Grace & Co.
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