公开(公告)号：US20160259243A1

公开(公告)日：2016-09-08

申请号：US14636240

申请日：2015-03-03

Applicant: Eastman Kodak Company

Inventor： Eiji Hayakawa ,  Masamichi Kamiya ,  Yoshiaki Shekiguchi ,  Koji Hayashi

IPC: G03F7/027 ,  B41C1/10 ,  G03F7/038

CPC classification number: G03F7/027 ,  B41C1/10 ,  B41C1/1008 ,  B41C2210/04 ,  B41C2210/08 ,  B41C2210/24 ,  B41C2210/26 ,  B41C2210/266 ,  G03F7/038

Abstract: A negative-working lithographic printing plate precursor has a substrate and an imageable layer disposed on the substrate. This imageable is removable with a lithographic printing ink, a fountain solution, or both. The imageable layer comprises (A) a free radical polymerizable compound, (B) a free radical polymerization initiator, and (C) a polymer that has a polysaccharide backbone and a free radical polymerizable group that is different than (A). Such precursors are on-press developable and exhibit excellent on-press development stability over time and excellent printing properties.

Abstract translation: 负性平版印刷版原版具有基板和设置在基板上的可成像层。 这种可成像的可以用平版印刷油墨，润版液或两者去除。 可成像层包括（A）自由基聚合性化合物，（B）自由基聚合引发剂，（C）具有多糖主链和不同于（A）的自由基聚合性基团的聚合物。 这样的前体是可压印显影的，并且随着时间的推移表现出优异的印刷后显影稳定性和优异的印刷性能。

公开(公告)号：US09366962B1

公开(公告)日：2016-06-14

申请号：US14642876

申请日：2015-03-10

Applicant: Eastman Kodak Company

Inventor： Masamichi Kamiya ,  Koji Hayashi ,  Yoshiaki Shekiguchi ,  Eiji Hayakawa

IPC: G03F7/00 ,  G03F7/038 ,  G03F7/20

CPC classification number: G03F7/0388 ,  G03F7/20

Abstract: A negative-working, infrared radiation-sensitive lithographic printing plate precursor is exposed and processed on-press to provide a lithographic printing plate. This precursor has an infrared radiation-sensitive imageable layer comprises free radical imaging chemistry; an infrared radiation absorber; a particulate primary polymeric binder comprising polyalkylene oxide segments having an average particle size (D1) of at least 50 nm and up to and including 1000 nm; and a particulate secondary resin having an average particle size (D2) of at least 3 μm and up to and including 10 μm. The imageable layer has an average dry thickness (t) of at least 1 μm and up to and including 4 μm and satisfies Equation (1): D2/1.4>t>D1   (1) and the average dry thickness (t) is defined by Equation (2): t=w/r   (2) wherein w is the dry coverage of the imageable layer in g/m2 and r is 1 g/cm3.

Abstract translation: 将负性红外辐射敏感平版印刷版原版曝光并在印刷机上进行处理以提供平版印刷版。 该前体具有包含自由基成像化学的红外辐射敏感可成像层; 红外辐射吸收器; 包含平均粒径（D1）为至少50nm并且至多且包括1000nm的聚环氧烷链段的颗粒状初级聚合物粘合剂; 和平均粒径（D2）为3μm以上且10μm以下的颗粒状二次树脂。 可成像层的平均干燥厚度（t）为至少1μm，直到并包括4μm，并且满足式（1）：D2 / 1.4> t> D1（1）和平均干燥厚度（t） 通过等式（2）：t = w / r（2）其中w是可成像层的干覆盖率，g / m 2，r是1g / cm 3。

公开(公告)号：US20140255848A1

公开(公告)日：2014-09-11

申请号：US14350462

申请日：2012-10-30

Applicant: Eastman Kodak Company

Inventor： Masamichi Kamiya ,  Yasuhiro Asawa ,  Yasushi Miyamoto ,  Maru Aburano ,  Eiji Hayakawa

IPC: G03F7/038

CPC classification number: B41C1/1008 ,  B41C1/1016 ,  B41C2210/02 ,  B41C2210/06 ,  B41C2210/14 ,  B41C2210/266 ,  G03F7/095 ,  G03F7/322

Abstract: An object of the present invention is to provide a lithographic printing plate precursor which exhibits satisfactory developability using a developing solution having the pH of 12 or lower and has long print run length and satisfactory scratch resistance, and also exhibits improved ink receptivity.Disclosed is a positive-working lithographic printing plate precursor comprising a substrate having thereon an image forming layer comprising a water-insoluble and alkali-soluble or alkali-dispersible resin in an aqueous alkali solution, wherein the image forming layer comprises at least a lower layer and an upper layer, and the resin of one of the lower layer and the upper layer, or both of the lower layer and the upper layer comprises a polyurethane including a unit comprising a substituent having an acidic hydrogen atom and a unit represented by the following general formula (I): wherein Rf is an alkyl or polyether group in which at least 50% of hydrogen atoms have been fluorinated, R1 is a hydrogen atom, or a substituted or non-substituted alkyl group, m is 0 or 1 to 10, n is 1 to 30, and x is 1 to 4.

Abstract translation: 本发明的目的是提供一种平版印刷版原版，其使用pH为12以下的显影液显示出令人满意的显影性，并且具有长的印刷行程长度和令人满意的耐擦伤性，并且还表现出改善的吸墨性。 公开了一种正性平版印刷版原版，其包含其上具有包含在碱性水溶液中的水不溶性和碱溶性或碱分散性树脂的图像形成层的基材，其中所述图像形成层至少包含下层 和上层，下层和上层之一的树脂，或下层和上层之一的树脂包括包含包含具有酸性氢原子的取代基的单元的聚氨酯和由以下的单元表示的单元 通式（I）：其中Rf是其中至少50％的氢原子已经被氟化，R1是氢原子或取代或未取代的烷基的烷基或聚醚基团，m是0或1到10 ，n为1〜30，x为1〜4。