Electrophotographic zinc oxide-resin binder lithographic printing plate precursor
AssigneeFuji Photo Film Co., Ltd.
InventorsEiichi Kato, Ryosuke Itakura, Hidefumi Sera, Kazuo Ishii
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Abstract
An electrophotographic lithographic printing plate precursor is disclosed, comprising a conductive support having provided thereon at least one photoconductive layer containing photoconductive zinc oxide and a resin binder, wherein said resin binder comprises a resin containing at least one functional group capable of forming a carboxylic acid upon being decomposed. The printing plate precursor forms an image faithful to an original and causes no background stains because of improved oil-insensitivity of non-image areas, and a printing plate obtained therefrom exhibits high stain resistance and printing durability.
Claims12
An electrophotographic lithographic printing plate precursor obtained from an electrophotographic photoreceptor comprising a conductive support having provided thereon at least one photoconductive layer containing photoconductive zinc oxide and a resin binder, said printing plate precursor being capable of producing a lithographic printing plate by a process involving forming an electrophotographic image on said photoconductive layer followed by subjecting said photoconductive layer to an oil-desensitization treatment, wherein said resin binder comprises a resin containing at least one functional group represented by formula
- --COO--L
- capable of forming a carboxyl group upon decomposition by an oil-desensitization treatment wherein L is selected from the group consisting of ##STR7## and --NH--OH, wherein R.sub.1 and R.sub.2 are each selected from the group consisting of a hydrogen atom or an aliphatic group;
- X represents an aromatic group;
- Z is selected from the group consisting of a hydrogen atom, a halogen atom, a trihalomethyl group, an alkyl group, --CN, --NO.sub.2, --SO.sub.2 R.sub.6, wherein R.sub.6 represents a hydrocarbon group, --COOR.sub.7, wherein R.sub.7 represents a hydrocarbon group, and --O--R.sub.8, wherein R.sub.8 represents a hydrocarbon group;
- n and m are each 0, 1, or 2, provided that when both n and m represent 0, z is not hydrogen;
- R.sub.3, R.sub.4, and R.sub.5 are each selected from the group consisting of a hydrocarbon group and --O--R.sub.9, wherein R.sub.9 represents a hydrocarbon group;
- M is Si,Sn, or Ti;
- and Q.sub.1 and Q.sub.2 each represent a hydrocarbon group.
Dependencies are inferred from the claim text.