Hitachi, Ltd.

Hitachi Chemical Company, Ltd.

Agency of Industrial Science and Technology

Shigeki Komatsuzaki

Yutaka Ito

Takayuki Nakakawaji

Mitsuyoshi Shoji

Fumio Nakano

Takao Uematsu

Masatoshi Wakagi

Masanobu Hanazono

Kunihiro Tamahashi

Fuminori Ishikawa

Hiroshi Sasaki

Hiroyuki Matsumoto

Akio Mukoh

Toshikazu Narahara

Hiroshi Suzuki

Tomoe Takamura

Shigeharu Onuma

Moriichi Sato

Koji Sato

Hiroyoshi Kokaku

Atsushi Kakuta

Shizuo Zushi

Tsuneaki Kawanishi

Katsumi Tamura

Akira Sato

Atsushi Morihara

Motoo Akagi

Shigeo Suzuki

Masaaki Imamura

Chiaki Yamagishi

Ren Ito

Hiroshi Go

Yoshiharu Honma

Ryuichi Shimizu

Etsuo Oe

Yasuo Shimamura

Mitsuoshi Shoji

Mitsuyosi Shoji

Chiaki Yamabishi

A magnetic recording medium is produced by coating a body having (a) a non-magnetic substrate, (b) at least one magnetic substance layer formed on the non-magnetic substrate and (c) at least one protective layer formed on the magnetic substance layer which contains at least one member selected from the group consisting of inorganic oxides, graphite and amorphous allotropes of carbon, with a solid surface modifier containing (i) an ammonium carboxylate type fluorine-containing compound having the formula,

Ammonium carboxylate type fluorine-containing compound, solid surface

Disclosed are an apparatus having sliding parts and a compound for preventing diffusion or separation of a base oil; and a compound for preventing diffusion or separation of the base oil used for the apparatus: an electronic or electric appliance using a joul heat generating source, means for taking out joul heat to the outside by sliding with said heat generating source, and heat conducting compound intervenient between said heat taking out means and heat generating source; and the heat conducting compound used for the appliance.

Apparatus equipped with a cooling block unit having sliding parts and a

Magnetic recording medium comprising a protective layer and a layer of

An electrophotographic photoreceptor comprising a photoconductive layer comprising a photoconductor, a support for the photoconductive layer and a surface layer formed on the photoconductive layer and comprising a curable resin film and an inorganic insulator pieces having a size larger than the film thickness of the curable resin film. In order to prevent the image blurring of an a-Si:H photoreceptor, on the outermost surface of the photoreceptor was formed a surface layer having a structure in which inorganic insulator pieces have protruded from the curable resin film. Since the curable resin is of high resistance and shows no quality change by corona irradiation, and besides the protruding inorganic insulator pieces prevent the abrasion of the resin, the surface layer having a long life and excellent humidity resistance, durability for corona irradiation and abrasion resistance can be realized. Further, by covering the surface layer with a fluorine-containing lubricant, the surface layer having a low friction coefficient and excellent cleaning characteristics is obtained, and besides the resin constituting the surface layer absorbs little moisture. As a result, it becomes possible to use the a-Si:H photoreceptors without a heater. Also, the surface layer of the present invention can be removed and then re-formed.

Electrophotographic photoreceptor with protruding inorganic insulator

A magnetic recording medium which comprises a non-magnetic substrate, a thin film magnetic layer formed on the surface of the substrate and an organic thin film protective layer formed on the magnetic layer, the organic thin film protective layer having a thickness of not more than 100 nm and containing a filler having a particle size of not more than 50 nm, wherein the surface of the organic thin film protective layer is further coated with a fluorine-based compound represented by the following general formula:

Magnetic recording apparatus comprising a magnetic recording medium and

An electrophotographic photosensitive element, e.g. for a photocopier or laser printer, comprises a substrate and a plurality of layers on the substrate including a photoconductive layer of a-Si:H and a protective and lubricating layer which is outermost from said substrate. To provide wear resistance and long life-time of the protective and lubricating layer, this layer comprises a microporous solid material having a pore structure which extends substantially over the whole thickness of the material and a hydrophobic lubricant carried by said solid material. The lubricant includes a liquid film and often times a non-particulate solid film, and provides at least part of the outer surface of the element and is present also in the pores of said microporous solid material.

Electrophotographic photosensitive element comprising a protective layer

A solid surface modifying composition comprising a film forming material and a fluoroalkyl ether ((Rf).sub.m (CONH--X--NHCO--Y).sub.m (m=1 or 2; Rf: perfluoropolyether chain; X: ##STR1## etc.; ##STR2## etc.) provides surfaces with such improvements as durable water and oil repellency, lubricity and lowered surface energy. The lubricating protective coating is applicable for coatings of recording mediums, photoreceptors and wirings.

Fluoroalkyl ether, surface modifying composition and method for

A resin composition comprising an epoxy resin and an isocyanate group-containing fluorine compound is particularly suitable for covering a magnetic recording medium comprising a non-magnetic substrate and formed thereon a thin magnetic film so as to give excellent sliding durability.

Magnetic recording medium based on epoxy resins modified by isocyanates

An electrophotographic member comprising a support, a photoconductive layer formed thereon, and a surface layer formed thereon, said surface layer including or attaching a lubricating agent having a perfluoropolyoxyalkyl or perfluoropolyoxyalkylene group to form an organic surface protective lubricating layer, and a fixing group to be fixed to the surface layer, is excellent in moisture resistance, wear resistance and cleaning properties and thus useful in an electrophotographic apparatus with a long life and high reliability.

Electrophotographic member containing a fluorine-containing lubricating

Disclosed is an electrophotographic photoreceptor in which an organic lubricant is provided on the surface of an organic photoconductive layer or on a protective layer formed on the organic photoconductive layer. Elements of the organic lubricant are partly exposed from the surface of the organic photoconductive layer or the protective layer while the remainder portions of the elements are embedded or fixed by chemical reaction in the surface region of the photoconductive layer or the protective layer so that the exposed portions of the elements of the organic lubricant provides a lubricating surface layer. The lubricating surface layer supresses wear of the photoreceptor thereby enabling the photosensitive layer to withstand a long repeated use without impairing electrophotographic characteristics.

Electrophotographic photoreceptor and method of producing the same

A lubricating composition comprising (A) at least one member selected from (a) a polyoxyalkylene alkyl ether phosphate diester, (b) a polyoxyalkylene alkylphenyl ether phosphate diester and (c) a phosphonate ester, in an amount of 3% by weight or more, (B) an N,N'-ethylenebis acid amide having an average particle size of 1 .mu.m or more in an amount of 2 to 15% by weight, and if necessary (C) a lubricating oil having a viscosity of 5 mm.sup.2 /s or more ('.degree. C.) is suitable for cold plastic working of aluminum alloys, particularly age-hardening type aluminum alloys, at the reduction of area of 35% or more.

Lubricant for cold plastic working of aluminum alloys

A substantially water-free, emulsion type liquid lubricant for metal forming which comprises:

Emulsion type liquid lubricant for metal forming, process for preparing

A substantially water-free, liquid lubricant for metal forming, which comprises a lubricating oil, and at least one of linearly condensed phosphorus compounds represented by the following general formula (1):

Lubricant for metal forming and process for metal forming

A lubricating composition comprising (a) a lubricating oil, (b) at least one phosphite ester of pentaerythritol, and (c) at least one compound selected from phosphate monoesters and diesters and phosphonates is suitable for metal forming, particularly for plastic working of aluminum and aluminum alloy with excellent formability and heat resistance.

Lubricant for plastic working of metals

A stabilized absorption composition comprising (a) a halogenated hydrocarbon refrigerant, (b) a liquid absorbent of a polyethylene glycol methyl ether and (c) at least one stabilizer selected from phosphite esters, epoxy compounds and organotin compounds is excellent in stability and can be used for an absorption type refrigerator for a long period of time without causing corrosion.

Liquid absorbent for absorption type refrigerator

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Mito, Japan

Shigeki Komatsuzaki