Fuji Electric Co., Ltd.

Dow Corning Corporation

Dow Corning Kabushiki Kaisha

Fuji Electric Imaging Device Co., Ltd.

Koichi Aizawa

Toyoki Kazama

Kenichi Hara

Toshiyuki Iijima

Shingo Sewa

Hideki Nakahara

Yukio Takano

Lenin J Petroff

Yoichi Nakamura

Sumitaka Nogami

Teruo Sasaki

James B McGee

Kiyoto Yamaguchi

Takashi Obinata

Yukihisa Tamura

Kiyoshi Mizushima

Minoru Emoto

Hiroaki Shoji

Hiroaki Shouji

Shigemichi Ito

An electrophotographic photoconductor and method of manufacturing thereof exhibits excellent characteristics of residual potential and repetition potential by containment of an additive of a compound. The electrophotographic photoconductor includes a conductive substrate and a photosensitive layer on the substrate, in which the photosensitive layer contains tri(4-nitrophenyl) phosphate.

Electrophotographic photoconductor and manufacturing method therefor

A photoconductor for electrophotography includes a conductive substrate and an organic undercoating layer on the conductive substrate. An organic charge generation layer is deposited on the undercoating layer, and an organic charge transport layer is deposited on the charge generation layer. The undercoating layer contains soluble polyamide resin and/or normal-butylated melamine resin as its main components. Alternately, the undercoating layer may contain resin as its main component, into which are dispersed small particles of anatase-type titanium dioxide. The surfaces of the anatase-type titanium dioxide particles may be treated with aminosilane. These undercoating layers produce a laminate-type photoconductor, which exhibits excellent electrophotographic characteristics that are stable during repeated use over long periods of time, and which vary little in a high temperature and high humidity atmosphere, as well as in a low temperature and low humidity atmosphere.

Photoconductor for electrophotography

The present invention provides a silicone antifoaming agent composition excellent in the persistence of the foam controlling effect. The silicone antifoaming agent composition comprises a polydiorganosiloxane and silica, which form an antifoaming agent to be improved, and 4 to 2,500 parts by weight per 100 parts by weight of the sum total of the polydiorganosiloxane plus silica of a modified silicone oil having at least one organic group bonded to a silicon atom and having at least one functional group selected from among epoxy, amino, amide, carboxyl, alkoxyl and hydroxyl groups and at least one substituted or unsubstituted polyoxyalkylene group bonded to a silicon atom.

Silicone antifoaming agent composition

An electrophotographic photoconductor comprises: an electroconductive substrate consisting of an aluminum alloy having an iron content of 0.1 percent by weight or less; an intermediate layer formed on said electroconductive substrate; a charge generation layer formed on the intermediate layer; and a charge transport layer formed on the charge generation layer. The intermediate layer comprises an alcohol-soluble resin and has a thickness of 0.5 .mu.m or more.

Electrophotographic photoconductors

An intermediate layer having fine hydrophobic silica particles is positioned between a substrate and a photosensitive layer. The fine hydrophobic silica particles preferably have a primary particle-averaged particle size of not more than 50 nm and desirably the surface of the fine hydrophobic silica particles is alkyl-silylated or treated with silicone.

Photosensitive body for electrophotography

There is disclosed a foam control composition comprising (I) a silicone defoamer reaction product and (II) a silicone glycol copolymer, which composition is particularly effective in defoaming highly acidic or highly basic aqueous systems. Component (I) is prepared by heating a mixture of (i) a polyorganosiloxane fluid, (ii) a resinous silicon compound, (iii) a finely divided filler and (iv) a catalytic amount of a compound for promoting the reaction of the other components at a temperature of 50.degree. C. to 300.degree. C.

Silicone foam control composition

A separate-function laminate-type photoconductor for electrophotography includes a photosensitive substrate having a subbing layer and a photosensitive layer laminated on the substrate in this order, in which the subbing layer is composed of a resin containing phosphorus in an amount within the range of 30 to 500 ppm by weight based on the resin. The resin for the subbing layer is preferably an epoxy resin. The photoconductor has a high sensitivity, a good ability to electrified and a low residual potential, and gives less variation in its characteristics due to environmental factors to give an image of a good quality constantly.

Photoconductor for electrophotography with phosphorus containing

An electrophotographic photoreceptor comprising a charge transport layer, a charge generation layer and a surface protection layer sequentially laminated on a conductive substrate wherein the binder of the charge transport layer is a resin having a molecular weight of not less than 20,000 and not more than 45,000.

Electrophotographic photoreceptor

The present invention provides a silicone antifoaming agent composition excellent in the persistence of the foam controlling effect. The silicone antifoaming agent composition comprises a polydiorganosiloxane and silica, which form an antifoaming agent to be improved, and 1 to 200 parts by weight per 100 parts by weight of the sum total of the polydiorganosiloxane plus silica of a lightly crosslinked siloxane having fluidity.

In the photoreceptor described in the specification, an electroconductive base has an amorphous silicon type photoconductive layer coated over a blocking layer on the base and an amorphous carbon-containing surface layer, coated over a buffer layer on the photoconductive layer, has a hardness on the free surface side which is higher than the hardness on the buffer surface side. Apparatus for preparing the photoreceptor includes a CVD vacuum chamber and an arrangement for supplying selected layer-forming gases to the chamber in a controlled manner.

An electrophotographic photoreceptor comprises a conductive base, a photoconductive layer formed of amophous silicon on the conductive base, a buffer layer on the photoconductive layer, and a surface layer covering the photoconductive layer through the buffer layer, wherein the buffer layer is formed of amorphous carbon.

Electrophotographic photoreceptor comprising amorphous silicon and

A heat-resistant silicone rubber is obtained from a composition of a vinyl-containing polyorganosiloxane, a hydrogenpolyorganosiloxane, a platinum-containing catalyst, carbon black, and an acetylacetone salt of a metal wherein the metal can be copper, zinc, aluminum, iron, cerium, zirconium, or titanium. The silicone rubber can maintain its rubber properties at temperatures of 350.degree. C. for prolonged periods of time.

Heat-resistant polyorganosiloxane composition

A photosensitive material comprising a photosensitive layer composed of an amorphous silicon-based material formed on an electrically conductive support, and a surface layer formed on said photosensitive layer, the surface layer being composed of amorphous carbon containing hydrogen and fluorine has improved printing durability and humidity resistance.

Electrophotographic photosensitive material comprising amorphous carbon

Foam control compositions are prepared by reacting a mixture of components which include a polyorganosiloxane fluid bearing one or more hydroxyl and/or hydrocarbonoxy groups, a resinous siloxane or a silicone resin-producing silicon compound, a finely divided filler material and a catalyst to promote the reaction of the listed components. The compositions can optionally contain a polyorganosiloxane fluid which is substantially free of reactive groups and/or a polyorganosiloxane fluid bearing two or more hydroxyl and/or hydrocarbonoxy groups.

Method of producing a silicone defoamer composition

Electrophotographic light-sensitive elements according to the invention comprise

Growing community of inventors

Kawasaki, Japan

Koichi Aizawa