(19)
(11) EP 0 406 001 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.04.1992 Bulletin 1992/15

(43) Date of publication A2:
02.01.1991 Bulletin 1991/01

(21) Application number: 90307130.6

(22) Date of filing: 29.06.1990
(51) International Patent Classification (IPC)5: G03G 5/06, G03G 5/05
(84) Designated Contracting States:
BE DE FR GB NL

(30) Priority: 29.06.1989 JP 165231/89
25.06.1990 JP 166349/90

(71) Applicant: NIPPON SHOKUBAI CO., LTD.
Osaka-shi (JP)

(72) Inventors:
  • Kaieda, Osamu
    Tsukuba-shi, Ibaragi-ken (JP)
  • Masuda, Kiyoshi
    Ushiku-shi, Ibaraki-ken (JP)
  • Ito, Hideki
    Tsukuba-shi, Ibaraki-ken (JP)
  • Yodoshi, Takashi
    Tsukuba-shi, Ibaraki-ken (JP)

(74) Representative: Rees, David Christopher et al
Kilburn & Strode 30 John Street
London WC1N 2DD
London WC1N 2DD (GB)


(56) References cited: : 
   
       


    (54) Matrix plate for electrophotographic platemaking and printing plate


    (57) An electrophotographic plate-making quality matrix plate provided on an electoconductive substrate thereof with a photosensitive layer formed of an alkali-soluble binder regin containing a photoelectroconductive organic compound, which matric plate is characterized by the fact that said photoelectroconductive organic compound is a zinc phthalocyanine represented by the general formula I:


    wherein R is -SZ group (where Z is a phenyl group, a phenyl group substituted with an alkyl group of 1 to 5 carbon atoms, or a naphthyl group), and said binder regin is a copolymer obtained by polymerizing a monomer mixture comprising (a) at least one compound selected from the group consisting of hydroxyalkyl acrylates and hydroxyalkyl methacrylates, (b) at least one copolymerizable unsaturated carboxylic acid, (c) at least one styrene compound, and (d) at least one compound selected from among acrylic esters other than said hydroxyalkyl acrylates of (a).





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