Nissan Chemical Industries Limited

Toyota Jidosha Kabushiki Kaisha

Hoya Corporation

Brewer Science, Inc.

Other

Yoshitane Watanabe

Keitaro Suzuki

Yoshinari Koyama

Motoko Iijima

Kiyomi Ema

Yoshiyuki Kashima

Masayuki Teranishi

Osamu Tanegashima

Mikio Ando

Tetsunori Matsukura

Terry Lowell Brewer

Kenji Tanimoto

Eiichi Yajima

Ram W Sabnis

Yutaka Ohmori

Akira Yanagimoto

Yasuhisa Sone

Akira Kitajima

Keiko Tasaki

Edith G Hays

Michael D Stroder

Susumu Suda

Isamu Yuuki

Eiji Okumura

Takeshi Takahashi

Fumio Suzuki

Koichi Maeda

Hisao Ikeda

Isao Ota

Tohru Nishimura

Tadayuki Isaji

Tatsuya Nogami

Yoshiro Hayashi

Osamu Fujimoto

Masuo Shindo

Yasuhiro Takahashi

Kouji Shishido

Takaichi Sugiyama

Shoichi Kaneko

Hiromi Suzuki

Kenichi Okubi

Makoto Kawashima

Takai Kawashima

Mitsunobu Matsumura

Tsutomu Kagamimiya

Hiroyuki Takagi

Jonathan W Mayo

Robert E Nichols

Michie Kaneko

Hisanobu Urahata

Chiaki Hosoi

Hirosi Murakami

Mutsuko Suzuki

Hard coating material and film comprising the same

A stable silica sol having an SiO concentration of 1 to 50% by weight and containing liquid-medium dispersed moniliform colloidal silica particles each having 3 or more as a ratio of D /D of a particle diameter (D nm) measured by a dynamic light scattering method to a mean particle diameter (a particle diameter measured by a nitrogen absorption method: D nm) where D is 50 to 500 nm, and which are comprised by spherical colloidal silica particles having a mean particle diameter of 10 to 80 nm and metal oxide-containing silica bonding these spherical-colloidal silica particles, and in which the spherical colloidal silica particles link in rows in only one plane, process for producing such and a coating composition for ink receiving layers containing such a silica sol and an ink jet recording medium.

Moniliform silica sol, process for producing the same, and ink-jet recording medium

An electro-conductive oxide particle comprising indium atoms, antimony atoms and oxygen atoms in a molar ratio of Sb/In of from 0.03 to 0.08, having a primary particle diameter of from 2 to 300 nm, and having a crystal structure of indium oxide.

Electro-conductive oxide particle and process for its production

The present invention relates to a polishing composition for polishing alumina disks, polishing substrates having silica surfaces and semiconductor wafers, comprising a stable aqueous silica sol containing moniliform colloidal silica particles having a ratio (D /D ) of a particle diameter D nm (as measured by dynamic light scattering method) to a mean particle diameter D (as measured by nitrogen absorption method) of 3 or more, wherein D is between 50 to 800 nm and D is between 10 to 120 nm, said moniliform colloidal silica particles being composed of spherical colloidal silica particles and a metal oxide-containing silica bond which bonds these spherical colloidal silica particles together, wherein the spherical colloidal silica particles are linked together in rows in only one plane by observation through an electron microscope, and further wherein said polishing composition contains 0.5 to 50% by weight of said moniliform colloidal silica particles.

Polishing composition

The present invention relates to a method for producing titanium oxide (TiO,)-tin oxide (SnO,) composite sol, a titanium oxide (TiO,)-zirconium oxide (ZrO,)-tin oxide (SnO,) composite sol, and a titanium oxide (TiO,)-cerium oxide (CeO,)-tin oxide (SnO,) composite sol. Further, the present invention relates to a coating composition containing any of the above-mentioned composite sols for forming coating films that are excellent in marring resistance, surface hardness, wearing resistance, transparency, heat resistance, light-resistant, weatherability, or water resistance on optical elements such as lenses for glasses and cameras, automotive windowpane, or optical filters attached to liquid-crystal displays, plasma displays, etc. and to optical elements having a cured film of the coating composition on the surfaces.

Method for producing composite sol, coating composition, and optical element

A sol comprising silica-magnesium fluoride hydrate composite colloidal particles used in an anti-reflection coating material for forming an anti-reflection coating and a process for its preparation are provided. A sol comprising silica-magnesium fluoride hydrate composite colloidal particles having a ratio of silica to magnesium fluoride hydrate MgF,.nH,O, n being in the range between 0.25 and 0.5, in terms of a SiO,/MgF,weight ratio of from 0.01 to 5 and a primary particle size of 5 to 50 nm. A process for the preparation of an aqueous sol comprising silica-magnesium fluoride hydrate composite colloidal particles which comprises the steps of adding an aqueous fluoride solution to a mixture liquid of a silica sol and an aqueous magnesium salt solution to produce a slurry of an agglomerate comprising silica-magnesium fluoride hydrate composite colloidal particles and removing the salts formed as by-products. A process for the preparation of an organosol further comprising the step of replacing water in the aqueous sol with an organic solvent.

Silica-magnesium fluoride hydrate composite sols and process for their preparation

An anhydrous zinc antimonate sol comprising a surface-modified anhydrous zinc antimonate colloid particles dispersed in a liquid, the surface-modified anhydrous zinc antimonate colloid particles comprising anhydrous zinc antimonate colloid particles as nuclei and a silicon-containing substance coating surfaces of the colloid particles, the sol containing an amine and/or an hydroxycarboxylic acid and a method for producing the same. The anhydrous zinc antimonate sol of the present invention is useful as transparent antistatic materials for resins, plastics, glasses, paper, and magnetic tapes, etc., transparent ultraviolet absorbents, transparent heat wave absorbents, high refractive index hard coating agents, antireflective agents, and the like.

Anhydrous zinc antimonate sol and method for producing the same

A sol having dispersed in a liquid medium particles of a hydrated zinc stannate having a primary particle diameter of from 2 to 200 nm and represented by the formula xZnO.multidot.ySnO.sub.2 .multidot.zH.sub.2 O wherein the molar ratio of x:y:z is 1:0.83 to 1.43:1.00 to 5.00.

Hydrated zinc stannate sols, coating compositions and optical elements

A sol having dispersed in a liquid medium particles of a hydrated zinc stannate having a primary particle diameter of from 2 to 200 nm and represented by the formula xZnO.ySnO.sub.2.zH.sub.2 O wherein the molar ratio of x:y:z is 1:0.83 to 1.43:1.00 to 5.00.

A high optical density, i.e., .gtoreq.3.0, at 1 micron or less film thickness, black matrix is disclosed having improved stability and shelf life as a consequence of admixing Pigment Black 7 and organic dye or dye mixtures on a polyimide polymer vehicle.

High optical density ultra thin organic black matrix system

A process for producing a stable acidic aqueous alumina sol containing 50 to 300 nm of elongate secondary particles which are elongated in only one plane and formed by edge-to-edge coagulation of rectangular plate-like primary particles having a length of one side of 10 to 30 nm when observed through an electron microscope, the process comprises the steps of: (A) adding an alkali to an aqueous alumina sol containing fibrous colloidal particles of an amorphous alumina hydrate to produce a reaction mixture having a pH of 9 to 12, (B) subjecting the reaction mixture obtained in the step (A) to a hydrothermal treatment at a temperature of 110 to 250.degree. C. to produce an aqueous suspension containing an alumina hydrate having a boehmite structure, and (C) desalting the aqueous suspension obtained in the step (B) by adding water and an acid by ultrafiltration to form an acidic aqueous alumina sol having a pH of 3 to 6.

Process for producing an acidic aqueous alumina sol

Reaction product of sulfonated amino resin and amino group-containing

The invention relates to coating compositions employing zinc antimonate anhydride comprising zinc antimonate anhydride particles and a liquid of a part-hydrolyzed silane coupling agent, a liquid of hydrolyzed ethylsilicate, a liquid of hydrolyzed methylsilicate, or a resin emulsion. The zinc antimonate anhydride particle having a ZnO/Sb.sub.2 O.sub.5 molar ratio in a range of from 0.8 to 1.2, a crystal structure of zinc antimonate anhydride (Zn Sb.sub.2 0.sub.5), and a primary particle size in a range of from 5 to 500 nm. The particle production method comprises the steps of mixing a zinc compound with a colloidal antimony oxide at a ZnO/Sb.sub.2 O.sub.5 molar rate in a range of from 0.8 to 1.2, followed by calcining the mixture within a temperature range of from 500 to 1100.degree. C. The particles are applicable as a flame retardant for plastics, a smoke suppressant, antistatic agent for plastics and glasses, and resistor.

Coating compositions employing zinc antimonate anhydride particles

A sol comprising colloidal particles of sodium magnesium fluoride (NaF.MgF.sub.2) having an average particle diameter of from 10 to 100 nm.

Sol and fine powder of sodium magnesium fluoride and processes for their

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Funabashi, Japan

Yoshitane Watanabe