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    • 6. 发明公开
    • Aqueous developable photosensitive polyurethane-(meth)acrylate
    • 水溶性可溶性聚氨酯(甲基)丙烯酸酯
    • EP0584970A3
    • 1994-09-28
    • EP93306070.9
    • 1993-07-30
    • PT Sub, Inc.
    • Huynh-Tran, Truc-Chi ThiKumpfmiller, Ronald James
    • G03F7/035C08G18/67C08G18/08C08G18/12
    • G03F7/035C08G18/12C08G18/4018C08G18/4808C08G18/672G03F7/027Y10S525/92C08G18/3275C08G18/0814C08G18/40C08G18/48
    • A photopolymer useful in preparing water-developable, solid printing plates is prepared by preparing a urethane prepolymer by reacting polyoxyalkylene diols or polyester diols, or a mixture thereof, with an excess of diisocyanate, followed by chain extending the resulting prepolymer mixture with an alkyldialkanolamine, then reacting the chain-extended product with a hydroxyalkyl(meth)acrylate. The resulting photopolymer 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 a slightly acidic aqueous medium, to give a plate with a desirable relief image. The use of the aqueous washout solution as opposed to organic solvents minimizes pollution problems.
    • 通过使聚氧化烯二醇或聚酯二醇或其混合物与过量的二异氰酸酯反应制备氨基甲酸酯预聚物,然后用烷基二烷醇胺将所得预聚物混合物链延伸,制备可用于制备水显影固体印刷板的光聚合物, 然后使链延长产物与(甲基)丙烯酸羟烷基酯反应。 所得的光聚合物适当地与另外的光活性(甲基)丙烯酸酯单体或低聚物和光引发剂一起配制,用于在基材上浇铸或挤出以形成柔版印刷版。 在通过阴极未曝光的区域的UV暴露之后,可以通过用微酸性水性介质洗涤来除去,得到具有所需浮雕图像的板。 与有机溶剂相反,使用水洗液可以最大限度地减少污染问题。
    • 8. 发明公开
    • Photocurable elements and flexographic printing plates prepared therefrom
    • PhotohärtbareElemente und daraus hergestellte Flexodruckformen。
    • EP0456336A2
    • 1991-11-13
    • EP91250110.3
    • 1991-04-24
    • PT Sub, Inc.
    • Goss, William K.Yang, Michael W.
    • G03F7/033
    • G03F7/033
    • Photocurable elements which are useful for preparing flexographic printing plates are provided which comprise a printing layer and a contiguous base layer, the printing layer comprising about 40 to 95 parts by weight of an elastomeric block copolymer, about 5 to 60 parts by weight of a second elastomeric polymer which is incompatible with the block copolymer, a photopolymerizable monomer, and a photoinitiator. The printing layer preferably also comprises an actinic radiation scattering and absorbing pigment.
      Also provided are relief printing plates prepared from the photocurable elements. The printing plates have a tack-free surface having excellent ink transfer properties, abrasion resistance, and solvent resistance. A high level of exposure latitude may also be provided in the photocurable elements of the invention.
    • 提供了可用于制备柔版印刷版的光固化元件,其包括印刷层和连续的基层,印刷层包含约40至95重量份的弹性体嵌段共聚物,约5至60重量份的第二 与嵌段共聚物不相容的弹性体聚合物,可光聚合单体和光引发剂。 印刷层优选还包含光化辐射散射和吸收颜料。 还提供了由光固化元件制备的凸版印刷版。 印版具有无粘性的表面,具有优异的油墨转印性能,耐磨性和耐溶剂性。 在本发明的光固化元件中也可以提供高水平的曝光宽容度。
    • 9. 发明公开
    • Photosensitive elastomeric polymer composition for flexographic printing plates
    • 用于柔性印刷板的光敏弹性体聚合物组合物
    • EP0104751A3
    • 1984-09-05
    • EP83304800
    • 1983-08-19
    • UNIROYAL, INC.
    • Worns, John R.
    • G03C01/68
    • G03F7/033
    • A high molecular weight butadiene/acrylonitrile copolymer is used in a photosensitive composition containing the following:
      (A) 40 to 90% by weight of the total composition of a high molecular weight butadiene/acrylonitrile carboxylated copolymer having a number average molecular weight of 30,000 to 125,000, an acrylonitrile content of 10 to 50%, and a carboxyl content of 1% to 15% by weight. (B) 5 to 60% by weight of the total composition of a high molecular weight butadiene / acrylonitrile noncarboxylated copolymer having a number average molecular weight of 50,000 to 100,000, an acrylonitrile content of 10 to 30% so that the combination of the carboxylated and non carboxylated high molecular weight copolymers give a composition with a carboxyl content of 3 to 10%. (C) 2 to 40% by weight of the total composition of an addition photopolymerizable ethylenically unsaturated monomer and (D) 0.1 to 10% by weight of the total composition of a photoinitiator activatable by actinic radiation. A photosensitive flexographic plate comprises the above composition layered on a supporting substrate.