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Photoconductive recording material with special outermost layer

  • US 5,208,127 A
  • Filed: 11/09/1990
  • Issued: 05/04/1993
  • Est. Priority Date: 11/13/1989
  • Status: Expired due to Term
First Claim
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1. A photoconductive recording material which incorporates in an outermost layer a siloxane-copolymer including at least one polysiloxane block that is copolymerized with aromatic ester units or with aromatic carbonate units and aromatic ester units, wherein the polysiloxane block(s) consist(s) of 5 to 200 chemically bonded diorgano siloxy units in which the organic substituents are selected from the group consisting of an alkyl, an aralkyl, an alkaryl and an aryl group, and said block(s) is (are) present in an amount by weight in the range of 0.3% to 80% with respect to the total weight of said copolymer, and wherein the aromatic carbonate part of said copolymer is present in the range of 0 to 94.7% by weight of said copolymer, and in said part the aromatic carbonate units correspond to the following general formula (I) :

  • ##STR15## in which;

    X represents S, SO2, ##STR16## each of R1, R2, R3, R4, R7 and R8 (same or different) represents hydrogen, halogen, an alkyl group or an aryl group, andeach of R5 and R6 (same or different) represents hydrogen, an alkyl group, an aryl group or together represent the necessary atoms to close a cycloaliphatic ring, andwherein the aromatic ester unit part of said copolymer is present in said copolymer in the range of 5 to 99.7% by weight and consists of a type of units within the scope of one of following structural formula (II) or (111) or consists of a mixture of both types of said units ;

    ##STR17## in which;

    X, R1, R2, R3 and R4 have the same meaning as described above.

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