Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Patent
1993-05-10
1994-11-08
Brammer, Jack P.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
430281, 430283, 430300, 522 95, G03C 1725
Patent
active
053626052
ABSTRACT:
A photocurable composition useful in preparing water-developable, solid printing plates is prepared by blending a urethane (meth)acrylate prepolymer with a complexing polymer based on poly(vinyl pyrrolidone) composition. The resulting composition is suitably formulated with additional photoactive (meth)acrylate monomers or oligomers and photoinitiator for casting or extrusion on a substrate to form a flexographic printing plate. Following UV exposure of the plate through a negative, unexposed areas can be removed by washing with aqueous media, to give a plate with a desirable relief image. The use of the aqueous washout solution as opposed to organic solvents minimizes pollution problems. The use of the complexing polymer significantly reduces the cold flow of the uncured plate and both increases toughness and reduces tack of the cured plate.
REFERENCES:
patent: 2760863 (1956-08-01), Plambeck, Jr.
patent: 4023973 (1977-05-01), Imaizumi
patent: 4762892 (1988-08-01), Koch
patent: 4889793 (1989-12-01), Taniguchi
patent: 4927739 (1990-05-01), Taniguchi
Huynh-Tran Truc-Chi T.
Mirle Srinivas K.
Brammer Jack P.
Capria Mary Ann
Gandhi Bharat C.
Looper Valerie E.
W. R. Grace & Co.,-Conn.
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