Hitachi, Ltd.

Hitachi Chemical Company, Ltd.

Hitachi Metals, Ltd.

Hitachi Koki Co., Ltd.

Mitsubishi Chemical Industries Limited

Dainichiseika Color & Chemicals Mfg. Co., Ltd.

Toyo Ink Manufacturing Company

Hirosada Morishita

Motoyo Wajima

Yasuki Mori

Akio Mukoh

Akio Takahashi

Atsushi Kakuta

Mineo Kawamoto

Takeshi Shimazaki

Shigeo Suzuki

Yutaka Itoh

Kanji Murakami

Kenji Tsukanishi

Shuji Imazeki

Tsuneaki Kawanishi

Hiroyuki Oka

Shunya Yokozawa

Yutaka Mizuno

Hitoshi Ono

Hideaki Kawakami

Masaharu Kaneko

Mikio Sato

Fumio Nakano

Hidetoshi Abe

Kunihiro Tamahashi

Kotaro Araya

Akio Nishikawa

Seiichi Imahori

Ritsuro Tada

Shigeharu Onuma

Akira Hosoya

Yoshiharu Nagae

Koji Noguchi

Masayasu Anzai

Nobuyoshi Hoshi

Hisao Yokokura

Eiji Kaneko

Teruo Kitamura

Yasuo Kikuchi

Yasuhiko Kando

Kazuyoshi Tokunaga

Masahiro Ono

Haruo Suzuki

Shigeyoshi Tanaka

Toyofusa Yoshimura

Shigemasa Takano

Osamu Isoo

Toshio Kumakura

Ren Ito

Shoji Kawakubo

Ryuichi Shimizu

Yoichi Matsuda

Isao Kumano

Manabu Sawada

Nobuhiko Shito

Katsuhito Suzuki

Youichi Matsuda

Kanzi Murakami

Ryusei Sasaki

Moloyo Wajima

Tooru Hosoda

A dark or black print article is ink-jet printed with a white ink composition comprising at least a white pigment having a particle size of less than 3 .mu.m, a solvent and a binder resin with a good print stability. The white ink composition has a good dispersion stability, a good redispersability, and no nozzle clogging.

White ink composition for ink-jet printing

The disclosure is concerned with a photoconductive member useful for electrophotography wherein a charge generating layer containing a new metal-free phthalocyanine and a charge transport layer containing a nonionic compound of styrylic or oxazol dye base. The photosensitive member exhibits a high sensitivity to light having a long wavelength and therefore, it is properly used as photosensitive member for printers using semiconductor lasers.

Composite type photosensitive member having metal-free phthalocyanine in

A thermosetting resin composition comprising (A) at least one dicyanamide compound and (B) at least one polyvalent imide having one or more unsaturated bonds and, if necessary (C) at least one polymerizable compound of epoxy compounds, phenolic compounds and triallyl isocyanurate compounds, and a prepolymer thereof obtained by subjecting the composition to a preliminary reaction with heating to the B stage can give a cured product having excellent heat resistance of class C and flexibility.

Thermosetting resin composition comprising (1) dicyanamide, (2)

A multi-layer printed circuit board produced by laminating a plurality of unit circuit sheets via prepreg resin sheets, the cured resin in said unit circuit sheet having a glass transition temperature Tg.sub.1, said prepreg resin sheets having been prepared by impregnating a reinforcing substrate with a resin composition which can be cured at a temperature equal to or lower than both the glass transition temperature of Tg.sub.1 and that of Tg.sub.2 of the resin in the prepreg resin sheet after cured, and binding the laminated sheets with heating under pressure at a temperature equal to or lower than both the temperatures of Tg.sub.1 and Tg.sub.2, has excellent dimensional stability, heat resistance and through-hole reliability.

Multi-layer printed circuit board and process for production thereof

The disclosure is concerned with an electrophotographic recording medium having a layer of a photoconductive material containing at least one member selected from the group consisting of .tau., .tau.', .eta., and/or .eta.' form metal free phthalocyanine, the layer being formed on an electroconductive supporter. The recording medium of this invention is characterized in that the recording medium exhibits high sensitivity to longer wavelength light.

Electrophotographic recording medium containing .tau. and .eta.

This invention relates to a guest-host type liquid crystal composition and a color liquid crystal display device in which said composition has been sealed. This invention provides a liquid crystal composition containing a specific anthraquinone dye as a pleochroic dye which, as the guest dye, has a degree of orderness of the alignment (order parameter) in the host liquid crystal in the range from 0.5 to 1, shows remarkable contrast between the colored state and the uncolored state, and is excellent in stability to light, heat, and the like. Further, this invention provides a color guest-host type liquid crystal display device in which said liquid crystal composition has been sealed.

Guest-host type liquid crystal composition and liquid crystal display

A polymer which has excellent heat resistance and mechanical properties which is useful as a molding material, contains the structural units having the following formulae [I] and [II]: ##STR1## wherein A and B each represents an at least divalent organic group having at least one aromatic ring such as a diphenyl ring; and m and n each represents a number of at least 1. The polymer is used in the form of a solution or varnish as an impregnating, laminating, bonding or film-forming coating or prepreg-forming varnish. A resin composition for forming the polymer contains an aromatic cyanamide compound and an aromatic amine which are reacted to form a prepolymer which, upon heating, is converted into a cured polymer having the structural units of formulae [I] and [II].

Heat-resistant resin from aromatic cyanamide compound and aromatic amine

A thermosetting resin composition comprises (A) at least one dicyanamide compound and (B) at least one polyvalent imide having one or more unsaturated bonds and, if necessary (C) at least one polymerizable compound of epoxy compounds, phenolic compounds and triallyl isocyanurate compounds. A thermosetting prepolymer can be obtained by subjecting the composition to a preliminary reaction with heating to the B stage and this prepolymer can give a cured product having excellent heat resistance of class C and flexibility. An exemplary composition containing 60 parts by wt. of 4,4'-dicyanomidodiphenylmethane and 40 parts by wt. of N,N'-4,4'-diphenylmethane bismaleimide dissolved in methyl Cellosolve is reacted at 70.degree. to 110.degree. C. for about 40 minutes to obtain a prepolymer soluble in methyl ethyl ketone. This prepolymer when admixed with 2-ethyl-4-methyl-imidazole and after removal of the methyl cellusolve will form an insoluble and infusible cured product upon heating at temperatures on the order of 170.degree. to 200.degree. C. for about 80 minutes. The resin composition when admixed with a solvent, is useful for impregnation and when used as a powder, it is useful as a molding resin.

Thermosetting resin composition comprising dicyanamide and polyvalent

When an alkaline earth metal carbonate powder is mixed with an adhesive and is formed into an adhesive layer in a conventional covering method, a problem of the transfer of catalyst for electroless plating during a masking step or later electroless plating step is solved. Further, blisters under plated film caused by a fire retardant contained in an insulating substrate is also overcome by the use of alkaline earth metal powder.

Process for producing printed circuit boards

In a complex type electrophotographic plate comprising an electroconductive support, superposed thereon a charge generating material (CGL) layer and a charge transport material layer superposed on the CGL layer when there is used as said charge transport material at least one compound of the formula:

Complex type electrophotographic plate and electrophotographic method

The disclosure is concerned with a maleimide-diamine resin composition which is well soluble to a low boiling point solvent and is excellent in heat resistance. The composition is featured by containing a maleimide-diamine adduct having the general formula: ##STR1## wherein A is a mono-, di-, tri- or tetravalent organic group containing at least two carbon atoms, R.sub.1 through R.sub.6 are hydrogen atom, a lower alkyl group, a lower alkoxy group, chlorine atom, bromine atom, trifluoromethyl group, or trichloromethyl group, and m is an integer of 0-4.

Maleimide: aryloxy diamine resin composition and process for producing

Electrophotographic copying is carried out by electrostatically forming a latent image on a recording medium, supplying a magnetic toner of single component system containing at least a resin and fine particles of forromagnetic material on a non-magnetic sleeve provided with a permanent magnet roller having a plurality of magnetic poles therein, transporting the magnetic toner into a gap between the recording medium and the non-magnetic sleeve, attaching the magnetic toner to the recording medium, thereby developing the latent image into a visible image, electrostatically transferring the toner image thus formed on the recording medium onto a transfer sheet, and fixing the transferred image, thereby obtaining a final image, wherein the magnetic toner has a resistivity of more than 5.times.10.sup.15 .OMEGA.cm and a relative dielectric constant of less than 3.0. Good development and good transferred image are obtained even with a recording medium having a low relative dielectric constant and a high insulating property, and practically high transfer efficiency can be obtained with the ordinary sheet having a low resistivity as a transfer sheet.

Electrophotographic developing method using magnetic toners

An electrophotographic photosensitive material having a long lifetime can be provided by forming an amorphous silicon layer having a thickness of 0.01-0.08 .mu.m on the photoconductive layer on the electrically conductive substrate in the said material without changing the characteristics of the photoconductive layer.

Electrophotographic photosensitive material having thin amorphous

In an electrophotographic plate comprising a substrate and a photoconductive layer formed on said substrate, when said substrate is made of an age-hardening type aluminum alloy and has a Vickers hardness of 60 Hv or higher, there can be produced electrophotographic plates high in dimensional accuracy, good in resistance to mechanical damages and impact, and very small in eccentricity when molded in the form of a drum. When the surface hardness of the selenium photoconductive layer is made 5 H or harder in pencil hardness, the resulting electrophotographic plate is excellent in printing performance and has a long life.

Electrophotographic plate having an age-hardened aluminum substrate and

A process for producing a fire retardant and heat resistant copper-clad laminated board, characterized in that a maleimide resin type varnish containing a small amount of a specific halogenated diphenyl ether compound is used for impregnation of base material therewith. Copper-clad laminated boards produced according to the present invention may be so improved in fire or flame retardant properties as to be classed 94 V-0 in accordance with UL 94 (vertical burning test), and, nevertheless, are not substantially downgraded in heat resisting properties as well as copper foil peel strength.

Process for producing fire retardant and heat resistant copper-clad

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Hitachi, Japan

Hirosada Morishita