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    • 47. 发明授权
    • Image forming resin particles for liquid developer for printing plate
    • 用于印版的液体显影剂的成像树脂颗粒
    • US5055370A
    • 1991-10-08
    • US406019
    • 1989-09-12
    • Nobuo SuzukiYutaka Sakasai
    • Nobuo SuzukiYutaka Sakasai
    • G03G5/06G03G9/13
    • G03G9/131G03G5/0688
    • A positively chargeable liquid developer to be used in making a printing plate by developing an electrostatic image formed on the surface of a printing plate precursor with a liquid developer and then by decoating the non-image area, the plate comprising a conductive base plate having provided thereon an electrophotographic photoreceptive layer, the liquid developer containing image forming particles comprising a resin which is prepared by copolymerizing monomers of formulae (I), (II) and (III) in a copolymerizing ratio of 0.1-9.9 : 90-99.8 : 0.1-10 by weight percent, the resin having a number average molecular weight ranging from 5.times.10.sup.3 to 5.times.10.sup.5 and a softening point ranging from 40.degree. C. to 150.degree. C.: ##STR1## (wherein R.sub.1, R.sub.1 ' and R.sub.1 " each represents a hydrogen atom or a methyl group; R.sub.2 represents an straight-chain or branched alkyl group containing 4 to 22 carbon atoms; R.sub.3 represents a hydrogen atom or a straight-chain or branched alkyl group containing 1 to 4 carbon atoms; R.sub.4 represents ##STR2## Z and B each represents --(CH.sub.2).sub.n -- (n=1-4), but B may be absent from the group represented by R.sub.4 ; X.sup.- represents an anion; R.sub.5, R.sub.6 and R.sub.7 may be the same or different, each being a straight-chain or branched alkyl group containing 1 to 12 carbon atoms, or a hydrogen atom, and R.sub.8 has the same definition as R.sub.3).
    • 一种带正电荷的液体显影剂,用于通过用液体显影剂显影形成在印版原版表面上的静电图像,然后通过对非图像区域进行去皮来制造印版,该板包括导电基板,该导电基板具有 在其上具有电子照相感光层,含有图像形成颗粒的液体显影剂含有通过使式(I),(II)和(III)的单体以0.1-9.9:90-99.8:0.1的共聚比共聚而制备的树脂 10重量%,数均分子量为5×10 3〜5×10 5,软化点为40〜150℃的树脂。(I)图像(II) III)(其中R1,R1'和R1“各自表示氢原子或甲基; R2表示含有4-22个碳原子的直链或支链烷基; R3表示氢原子或直链或 支链烷基含有 1至4个碳原子; R 4表示Z,B各自表示 - (CH 2)n - (n = 1-4),但可以不存在由R 4表示的基团中; X-表示阴离子; R5,R6和R7可以相同或不同,各自为含有1至12个碳原子的直链或支链烷基或氢原子,R8具有与R 3相同的定义)。