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    • 5. 发明申请
    • A PRINTING FORM AND A PROCESS FOR PREPARING A PRINTING FORM USING TWO-STEP CURE
    • 一种印刷形式和一种使用两步固化印刷印版的方法
    • WO2014138499A1
    • 2014-09-12
    • PCT/US2014/021442
    • 2014-03-06
    • E. I. DU PONT DE NEMOURS AND COMPANY
    • LU, Helen, S.M.WAGMAN, Mark, E.
    • B41C1/02B41N1/12B41N1/22B41C1/045B41C1/05B41C1/18B41M1/10
    • B41C1/05B05D3/0254B23K26/40B23K2201/35B29C59/002B41C1/045B41C1/18B41M1/10B41N1/12B41N1/22
    • The invention pertains to a printing form and a process for preparing the printing form from a curable composition that includes an epoxy resin, less than a stoichiometric amount of at least one amine curing agent, and optionally a catalytic curing agent and/or a latent curing agent. The process includes applying the curable composition to a supporting substrate to form a layer, partially curing the layer at a first temperature, engraving the partially cured layer, and then completing the curing by heating at a second temperature greater than the first temperature. The less than stoichiometric amount of the amine curing agent guarantees that after the first curing step, epoxy functionalities in the curable composition will be available for second curing step. The optional catalytic curing agent or latent curing agent promotes completion of the cure at higher temperature. The process prepares printing forms, particularly gravure printing forms, having a cured resin composition layer that is engravable, resistant to solvent inks and to mechanical wear, and capable of printing gravure-quality images.
    • 本发明涉及一种由可固化组合物制备印刷形式的印刷形式和方法,所述可固化组合物包括环氧树脂,小于化学计量的至少一种胺固化剂,以及任选的催化固化剂和/或潜在固化剂 剂。 该方法包括将可固化组合物施加到支撑基底上以形成层,在第一温度下部分固化该层,雕刻部分固化层,然后通过在大于第一温度的第二温度加热来完成固化。 胺固化剂的化学计量不足以确保在第一固化步骤之后,可固化组合物中的环氧官能度可用于第二固化步骤。 任选的催化固化剂或潜在性固化剂有助于在较高温度下完成固化。 该方法制备具有可雕刻,耐溶剂油墨和机械磨损的固化树脂组合物层并且能够印刷凹版印刷图像的印刷形式,特别是凹版印刷形式。
    • 6. 发明申请
    • A PRINTING FORM AND A PROCESS FOR PREPARING A PRINTING FORM
    • 一种印刷形式和一种制备印刷形式的方法
    • WO2014074431A1
    • 2014-05-15
    • PCT/US2013/068221
    • 2013-11-04
    • E. I. DU PONT DE NEMOURS AND COMPANY
    • WAGMAN, Mark, E.LU, Helen, S., M.
    • B41N1/12B41N1/22
    • B41N1/12B41C1/045B41C1/05B41N1/22
    • The invention pertains to a printing form and a process for preparing it from a curable composition that includes an epoxy resin and an amine curing agent selected from primary amines and secondary amines. The process includes applying the curable composition to a supporting substrate to form a layer, curing the layer, and engraving to form at least one cell in the cured layer. Preheating the substrate to a surface temperature greater than 40C and less than about 80C results in improved surface characteristics of the printing for, such as reduction of amine blush, elimination of bubbles, and lessened surface roughness, while not accelerating the curing rate or evaporation of volatile components to an undesirable degree. The process prepares printing forms, particularly gravure printing forms, having a cured resin composition layer that is engravable, resistant to solvent inks and to mechanical wear, and capable of printing gravure-quality images.
    • 本发明涉及一种印刷形式及其制备方法,该可固化组合物包括环氧树脂和选自伯胺和仲胺的胺固化剂。 该方法包括将可固化组合物施加到支撑基底上以形成层,固化层和雕刻以在固化层中形成至少一个电池。 将基材预热至大于40℃且小于约80℃的表面温度导致改善的印刷表面特性,例如减少胺腮红,消除气泡和减少表面粗糙度,同时不加速固化速率或蒸发 挥发性组分到不期望的程度。 该方法制备具有可雕刻,耐溶剂油墨和机械磨损的固化树脂组合物层并且能够印刷凹版印刷图像的印刷形式,特别是凹版印刷形式。