Nippon Kayaku Kabushiki Kaisha

Kansai Paint Kabushiki Kaisha

Osaka University

Masaki Shinmoto

Shoiti Hayashihara

Masahiro Imaizumi

Masahiro Hirano

Noriko Kiyoyanagi

Toyofumi Asano

Masaru Kudo

Michiharu Arifuku

Chie Umeyama

Shigeru Matsuyama

Hiroomi Hosoi

Seizin Shindo

Kazuki Fujimoto

Shogo Agata

Shoji Koriyama

Ryota Negishi

Yoshihiro Kobayashi

Masaru Kudho

Shoiti Hayashibara

Mitsuyo Nishitoh

Problem To provide a process for producing single-walled carbon nanotubes with which highly pure, high-quality single-walled carbon nanotubes can be produced with high efficiency, and to provide a transparent conductive film using the single-walled carbon nanotubes obtained by that production method. Solution A process for producing single-walled carbon nanotubes by chemical vapor deposition (CVD), wherein particles of a nonmetallic material containing 500 ppm or lower of metallic impurities including metals and compounds thereof are used as growth nuclei; and after a growth gas is introduced into a furnace used for growing carbon nanotubes, the growth gas used in an initial stage of growth of carbon nanotubes and the growth gas used in a stage of growth of regular carbon nanotubes (stationary growth stage) thereafter are prepared to different compositions and different partial pressures.

High purity carbon nanotube, process for preparing the same and transparent conductive film using the same

An object of the present invention is to provide a polyamide resin composition from which the solvent is easily removed during film formation and which gives a film or adhesive layer reduced in residual solvent content. It is suitable for use especially as vanish. The composition and vanish are characterized by comprising as essential ingredients a phenolic hydroxyl group-having aromatic polyamide resin and a cycloalkanone as a solvent and preferably further containing a curable resin.

Polyamide resin-containing varnish and its use

Provided is a black sealant for liquid crystal cell comprising (a) an epoxy resin, (b) a novolac resin, (c) a curing accelerator and (d) a titanium-type black pigment. The use of the black sealant for liquid crystal cell of the present invention can provide a liquid crystal cell which prevents light leakage of the liquid crystal cell from the sealed portion, which has a high electrical insulation property and which is excellent in an adhesion strength and a humidity resistance.

Black sealant for liquid crystal cell and liquid crystal cell

The present invention provides a polyolefin resin-based marking composition capable of developing a vivid color in dark brown to black on irradiation with laser beams, moldings of the composition, and a laser marking method. The marking composition comprises a polyolefin resin-based marking composition containing from 0.005% by weight to less than 0.5% by weight of a silicon compound based on the polyolefin resin.

Marking method

The present invention relates to a laser marking article having two or more layers of thin films on the surface thereof, wherein one of the layers other than the outermost layer is a thin film made of a laser marking ground composition containing a laser beam-absorbing whitish inorganic compound powder and a binder as essential ingredients, and to a laser marking method comprising irradiating said laser marking article with a laser beam. According to the present invention, a vivid white-colored mark can be formed on the surface of an article even in case of low-energy laser irradiation or even in case of high-speed marking.

Laser marking article and laser marking method

Marking composition and laser marking method

The present invention relates to a marking composition capable of developing a vivid white color upon the application of laser beams, which composition comprises a polyolefin resin having no fluidity at a temperature of 50.degree. C. and at least one inorganic material selected from talc, calcium carbonate and aluminum hydroxide, wherein the inorganic material is blended in a ratio of 1-300 w/w % based upon the polyolefin resin. The invention also provides the resin moldings obtained by molding the marking compositions.

Composition adaptable or suitable for being marked and molding thereof

This invention relates to a laser marking method which comprises heating a base article having on its surface a thin film of a laser marking composition containing a color former and a color developer having a melting point of 200.degree. C. or above, and then applying laser light to the thin film. The method of this invention is capable of no-break marking with vivid color development by application of laser light, without causing discoloration of the ground even under a condition of 120.degree. C. or above.

Laser marking method and aqueous laser marking composition

This invention relates to a laser marking method which comprises coating a laser marking composition containing as essential components a color former, a color developer and an inorganic compound having the absorption peak on the infrared absorption spectrum in the region of 900-1,000 cm.sup.-1 on a substrate to form a color developing layer, and irradiating laser light to the color developing layer; the laser marking composition; and articles having a color developing layer made of the laser marking composition. The method of this invention is capable of forming a mark with vivid color development even when the color developing layer is a thin film of less than 5 .mu.m in thickness or when marking is carried out at high speed.

Laser marking method, laser marking composition and articles having

A toner for electrophotographic process which comprises the compound represented by the following formula (1). ##STR1## The compound acts as a charge control agent in the toner and is good in compatability with a binder and the toners prepared using it are excellent in specific chargeability and good in charge durability due to moisture resistance.

Toners for electrophotographic process containing a phenolic compound

A phenolic compound represented by the formula: ##STR1## a process for producing it and a recording material comprising a support bearing a heat- or pressure-sensitive color-forming layer containing the phenolic compound and a leuco dye.

Growing community of inventors

Yono, Japan

Masaki Shinmoto