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This bis-azo pigment 1 is stable in heat and light, possesses AS315V high charge generation efficiency, and is high in sensitivity and excellent in repeatability. To prepare, incidentally, an organic photosensitive material of function separation type using charge generating material and charge transferring material, it is necessary to select materials superior in matching, satisfying all electrophotographic properties including the AS315V, potential retaining performance, potential stability, and residual potential. For example, however, even if sufficiently the charge generating material may generate an electric charge, satisfactory electrophotograhic properties are not obtained unless combined with a charge transferring material capable of injecting and conveying the charge efficiently.

According to the preceding U.

AS315V However, the charge generating materials disclosed in the U. The oxidation and deterioration of such bis-azo pigment 1 may be estimated to be due to decomposition of AS315V azo group by adsorption of ozone on the azo group. Such oxidation and deterioration will be promoted when the bis-azo compound 1 is used in combination with the charge transferring material which is an electron donor compound.

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It is considered because the electron donor compound is oriented on the azo group when the basicity of the electron donor compound is strong, and the electron density in the azo group is intensified so as to be vulnerable to the attacks of ozone or nitrogen oxides. Therefore, it was hitherto impossible AS315V obtain a photosensitive material possessing a high sensitivity and an excellent repeatability without sacrificing the superior characteristics of the bis-azo pigment 1.

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Yet, although matching of charge generating material and charge transferring material is satisfactory, if there is problem in the properties of the binding resin for composing the photosensitive AS315V by coupling these materials, a photosensitive material comprehensively excellent in electrophotographic properties cannot be obtained. For example, if the strength of the photosensitive layer is not enough or if the adhesion of the photosensitive layer to the base is not sufficient, the surface may be flawed or the photosensitive material may be peeled off due to AS315V impact receiving from the cleaning blade pressed to the photosensitive material surface in the image forming apparatus, a felt preventive the toner splash, a charging roller, a transfer roller and other members, or paper contacting with the surface of the photosensitive material at the time of image formation.

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Therefore, however excellent the sensitivity may be, a spotless excellent image is not obtained, or however excellent the repeatability may be, AS315V durability is not obtained. As the binding resin, various high polymers disclosed in the foregoing U.

In the Japanese Unexamined Patent Publicationthe polycarbonate, among the above polymers, is disclosed as the material excellent in film AS315V capability and capable of forming a tough photosensitive layer superior in resistance to abrasion. However, the polycarbonate is not enough in adhesion with the conductive substrate or base layer, and hence a certain pretreatment is needed prior to layer forming in order to improve the adhesion, which leads to problems in productivity and cost. In the Japanese Unexamined Patent Publications andderivatives of polycarbonate having silicon introduced in the main chain are used as the binding resin, but these derivatives, same as the ordinary polycarbonate, are not sufficient in the adhesion.

In order to eliminate the defects of the polycarbonate and improve the adhesion of the photosensitive layer, the Japanese Unexamined Patent Publication discloses blending of AS315V, and the Japanese Unexamined Patent Publication discloses blending of polyester or polyallylate. In these polymers, however, the main chain is stiff, and the ester bond responsible for adhesion does not act sufficiently on the base such as the conductive substrate.

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Hence, it is necessary to add a large content to enhance the adhesion, which may lead to lowering of sensitivity of the photosensitive material as the polar group the electron aspirating group in the AS315V works as a carrier trap, or promotion of photo-oxidation deterioration of the charge generating material and charge transferring material in the high electric field. In particular, the bis-azo pigment 1 is a molecule not having planeness like the conventional phthalocyanine or perylene pigment, and is high in dissolution in solvent, and the rate of dispersion of one molecule each in the photosensitive AS315V is relatively high, and hence it is more vulnerable to photo-oxidation deterioration as compared with conventional pigments dispersed in the photosensitive layer as fine particles composed of multiple molecules.

Accordingly, the polyester-carbonate or the like cannot be blended in a large quantity, and the adhesion of the photosensitive layer cannot be enhanced sufficiently. It was therefore impossible to obtain a photosensitive material possessing high sensitivity and repeatability without sacrificing the excellent characteristics of the bis-azo pigment 1.


It is other object of the invention to present an electrophotosensitive material using the bis-azo pigment expressed in Formula 1 as charge generating material, not limited in the selective range of the charge transferring material, and not adversely affecting the sensitivity and durability of the photosensitive material. It is further object of the invention to present a high performance electrophotosensitive material having a photosensitive layer containing the bis-azo pigment expressed in Formula 1 and possessing a high strength and adhesion. The present inventors intensively accumulated studies on the charge transferring material to be used in combination with the bis-azo pigment, and discovered a new fact that the electrophotosensitive material formed by disposing a photosensitive layer containing the bis-azo pigment expressed in Formula 1 as the charge generating material and a diamine compound expressed in Formula AS315V That is, in the invention, by combining the above specific charge generating material with the charge transferring material, it becomes stable against oxidation and deterioration by ozone, nitrogen oxides and light, so that the sensitivity and repeatability durability may be outstandingly improved as compared with the conventional electrophotosensitive material.


The action by the combination of the charge generating material and charge transferring material in the invention is not fully clarified, but the suppressing action on the oxidation and deterioration induced by ozone, nitrogen oxides or the like may be estimated as follows. The diamine compound 2 used as the charge transferring material is advanced in the non-localization of electrons, and the coordination into the azo group of the bis-azo pigment 1 is impeded by the stereo obstacle by enclosure of nitrogen atoms with phenyl groups, and hence the electron density of the azo AS315V is not increased, so that it is estimated to be less vulnerable to attacks of ozone or the like. In addition, the bis-azo pigment 1 possesses a high charge generating efficiency and a high sensitivity. The diamine compound 2 is closely related with the bis-azo pigment 1 in ionization potential, and also being excellent in light fastness and durability and the mobility less dependent on the electric field intensity.

According to the invention, these characteristics are not decreased, and an optimum combination is realized, AS315V that the high performance of the electrophotosensitive material may be expressed.

High-end cards usually go at high price, but still it's feasible to detect AS315V model that would also be acceptable in cost. Zotac has recently released, as claimed by the manufacturer, the most powerful graphics card in the AS315V.

Edition, it is delivered with the factorial overclocking parameters. This signifies that the card operates at heightened frequencies from the very beginning. Moreover, this product is ready to gladden the potential audience with an affordable price in combination with an utmost performance. PCB Design and Delivery Following the general tendencies, Zotac implemented its singular facilities in the design of a printed circuit board. Due to the bridging effect, the gap voltage and 4 Duty Cycle Tau: The easy It is the ratio of pulse on-time and the pulse period. AS315V

Duty cycle short circuit takes place, which causes early explosion in the is defined in the equation below. DrvHub AS315V cookies to improve content and ensure you get the best experience on our website. If you continue to use this site we assume that you accept our.

AS315V package supports the following driver models:CARDEXpert SiS Apollo 3D Thrill Apollo 3D Thrill Explorer AGP AGP AG

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