Nissan Chemical Industries Limited

Osamu Fujimoto

Yoshinari Koyama

Tadayuki Isaji

Osamu Tanegashima

Yoshitane Watanabe

Motoko Asada

Tomonari Shinji

A hydrophobic organic solvent-dispersed sol of anhydrous zinc antimonate colloidal particles and a method for producing the same. The hydrophobic organic solvent-dispersed sol includes surface-modified anhydrous zinc antimonate colloidal particles dispersed in a hydrophobic organic solvent having a water solubility of 0.002 to 12% by mass. The surface-modified anhydrous zinc antimonate colloidal particles are formed by: coating outer surfaces of anhydrous zinc antimonate colloidal particles (A) serving as cores with at least one substance (B) of colloidal particles of a composite oxide containing silica and stannic oxide or silica and antimony pentoxide at a silica/stannic oxide or silica/antimony pentoxide ratio of 0.1 to 10, an oligomer of the colloidal particles, or a mixture of the colloidal particles and the oligomer to form modified anhydrous zinc antimonate colloidal particles (C); and bonding an organosilicon compound and an amine compound to surfaces of the colloidal particles (C).

Hydrophobic organic solvent-dispersed sol of anhydrous zinc antimonate colloidal particles and method for producing the same

There is provided an organosol of surface-modified fluoride colloid particles obtained by coating the surface of a fluoride colloid particle as a core with an organophosphorus compound and a method for producing the organosol. An organosol of a surface-modified fluoride colloid particle comprising: a fluoride colloid particle as a core; and at least one type of an organophosphorus compound selected from a group consisting of organophosphorus compounds represented by the following general formula (1), (2), and (3):(R&#x2014;O)P(&#x2550;O)(OM)&#x2003;&#x2003;(1)(R&#x2014;O)P(OM)&#x2003;&#x2003;(2)(R)P(&#x2550;O)(OM)&#x2003;&#x2003;(3)where R represents a substituted or unsubstituted alkyl group, alkenyl group or aryl group, M represents a hydrogen atom, an alkali metal or NZ(Z represents a hydrogen atom or an alkyl group); and n represents an integer of 1 or 2, the organophosphorus compound coating a surface of the fluoride colloid particle.

Organosol of fluoride colloid particle and method for producing the same

There is provided a conductive tin oxide sol having a high transparency, and a process for producing the sol, a coating composition by use of the sol and a material coated with the coating composition. The conductive tin oxide sol containing phosphorus-doped conductive tin oxide colloidal particles (A), wherein a sol prepared so as to have the colloidal particles (A) in a concentration of 10 mass % in the sol has a transmittance of 30% or more at a wavelength of 600 nm in an optical path length of 10 mm. The particle diameter of the conductive tin oxide sol by observation with transmission electron microscope is 2 to 25 nm. The molar ratio of the doped phosphorus (P) to the tin oxide (SnO) in the colloidal particles (A) is 0.005 to 0.2. The conductive tin oxide sol is produced by mixing a phosphorus compound in a tin oxide sol, and then subjecting to a hydrothermal treatment. The coating composition contains the conductive tin oxide sol and a binder. The material having a coating film formed from the coating composition is also provided.

Conductive tin oxide sol and process for producing same

There is provided a sol in which surface-modified colloidal particles are dispersed in a liquid, wherein the surface-modified colloidal particles are obtained by using anhydrous zinc antimonate colloidal particles, metal oxides comprising tin atom, zinc atom, antimony atom and oxygen atom, or tin oxide-doped anhydrous zinc antimonate colloidal particles as nuclei, and by coating the surface of the nuclei with an aluminum-containing substance (e.g., an aluminum chelating agent), a polymer type surfactant (e.g., a polycarboxylic acid ester or polyethylene glycol monoaliphatic acid ester surfactant) or both of them. The anhydrous zinc antimonate sol is used for several purposes such as transparent antistatic materials in the form of resin, plastic, glass, paper, magnetic tape or the like, transparent UV absorbers, transparent heat radiation absorbers, high refractive index hard coating agent, anti-reflective agent and the like.

Anhydrous zinc antimonate sol and process for producing same

The present invention relates to a metal oxide particle comprising tin atom, zinc atom, antimony atom and oxygen atom, having a molar ratio SnO:ZnO:SbOof 0.01&#x2013;1.00:0.80&#x2013;1.20:1.00 and having a primary particle diameter of 5 to 500 nm; and a process for producing the metal oxide particle comprising the steps of: mixing a tin compound, a zinc compound and an antimony compound in a molar ratio SnO:ZnO:SbOof 0.01&#x2013;1.00:0.80&#x2013;1.20:1.00; and calcining the mixture at a temperature of 300 to 900&#xb0; C. The metal oxide particle is used for several purposes such as antistatic agents, UV light absorbers, heat radiation absorbers or sensors for plastics or glass, etc.

Metal oxide particle and process for producing same

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.

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Sodegaura, Japan

Osamu Fujimoto