摘要:
An electrophotosensitive material of the present invention is formed by providing a photosensitive layer containing a bis-azo pigment expressed in formula (1):
wherein A¹, A², R¹ and n are as defined, as a charge generating material, and a diamine compound expressed in formula (2):
wherein R², R³, R⁴, R⁵, R⁶ and R⁷ p and q k, l, m and o are as defined, as a charge-trasferring material, on a conductive substrate. As a charge generating material, a perylene pigment, anthanthrone pigment, X-type metal-free phthalocyanine pigment, imidazoleperylene pigment or perylene bis-azo pigment are preferable used together with the bis-azo pigment. Thus, photosensitive material is excellent in sensitivity and durability.
摘要:
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).
摘要:
This invention relates to photosensitive materials which comprise, on a conductive support, a layer structure having at least one layer. The at least one film is made of a cured film of a dispersion of a photoconductor in a binder polymer which has recurring units of the following general formula
wherein at least one of X₁ and X₂ is a bromine atom provided that at least one benzene ring in the units is partly or fully substituted with the bromine atom and n is an integer. The photoconductor may be X-type metal-free phthalocyanine or τ -type metal-free phthalocyanine dispersed partially in a molecular state and partially in a particulate state. Alternatively, combinations of carrier generation and carrier transport agents may be used. The layer structure is either a single-layer structure or a double-layer structure.
摘要:
An electrophotographic photoreceptor comprising an electroconductive substrate and a photosensitive layer thereon containing a carrier generation material, a carrier transport material and an amine compound represented by the following formula (I): wherein A represents one selected from the group consisting of
(i)
-CH₂X
, (ii)
-CH₂CH₂X
, wherein X represents an aromatic carbocyclic ring residue, an aromatic heterocyclic ring residue, a cycloalkyl group or a heterocycloalkyl group which may have a substituent, (iii) a cycloalkyl group or a heterocycloalkyl group which may have a substituent, and (iv) an aromatic carbocyclic ring residue or an aromatic heterocyclic ring residue which may have a substituent; B represents one selected from the group consisting of (i), (ii) and (iii) as defined in A; and R represents a hydrogen, alkyl group which may have a substituent or aralkyl group which may have a substituent is disclosed. The electrophotographic photoreceptor according to the present invention has an excellent electrophotographic characteristics, high resistance against ozone and nitrogen oxides, stable characteristics and image quality even after repeated use and extremely high durability.
摘要:
A photoconductive composition which exhibits excellent dark reduction retention, excellent sensitivity to radiation from the near infrared region to the infrared region as well as excellent long-term stability, is comprised of an inorganic photoconductor, a cyclic acid anhydride and a spectral sensitizing dye dispersed in a binding resin. A laser beam scanning exposure can be performed on said composition to produce electrophotographic images.
摘要:
Photoreceptors containing arylamine compounds to facilitate the transport of electrical charge in and between component layer are rendered less susceptible to damage by liquid developers by using a hydroxy arylamine compound represented by the formula:
s is 0, 1 or 2, the dihydroxy arylamine compound being free of any direct conjugation between the -OH groups and the nearest nitrogen atom through one or more aromatic rings.
摘要:
Es wird ein elektrophotographisches Aufzeichnungsmaterial beschrieben, das aus einem elektrisch leitenden, insbesondere zur Herstellung von Druckformen oder gedruckten Schaltungen geeigneten Schichtträger und einer photoleitfähigen Schicht aus organischem Photoleiter, Bindemittel und Sensibilisator besteht. Die photoleitfähige Schicht enthält dabei zusätzlich ein Kondensationsprodukt aus Benzophenon-2-carbonsäure und einem Dialkylanilin, wie Benzophenon-2-carbonsäure und Diethylanilin oder 4'-Methylbenzophenon-2-carbonsäure und Diethylanilin.
摘要:
An electrophotographic photosensitive member improved in cleaning performance and having a good image reproducibility, even in its long-term service, and a process cartridge and an electrophotographic apparatus which have the electrophotographic photosensitive member are provided. The electrophotographic photosensitive member has, on the surface of its photosensitive layer, has a plurality of depressed portions which are independent from one another, and, where the major-axis diameter of each depressed portion is represented by Rpc and the depth that shows the distance between the deepest part of each depressed portion and the opening thereof is represented by Rdv, the depressed portions each have a ratio of depth to major-axis diameter, Rdv/Rpc, of from more than 1.0 to 7.0 or less.