A coating film-forming composition includes a hydrolysis-condensation product of a hydrolyzable silane and fine inorganic particles subjected to a special dispersion treatment, that can be formed into a highly heat-resistant, highly transparent coating film capable of exhibiting a high refractive index and having a large thickness and excellent storage stability as a coating composition; and a process for producing the coating film-forming composition.

The present invention relates to surface functionalized titanium dioxide nanoparticles, a method for its production, a coating composition, comprising the surface functionalized titanium dioxide nanoparticles and the use of the coating composition for coating holo-grams, wave guides and solar panels. Holograms are bright and visible from any angle, when printed with the coating composition, comprising the surface functionalized tita-nium dioxide nanoparticles.

A coating-forming composition for an electrical steel sheet that maintains excellent insulating properties, corrosion resistance, adhesion, and the like required in a coating for an electrical steel sheet, and exhibits excellent viscosity stability, with an increase in viscosity over time being kept gradual. A coating-forming composition for an electrical steel sheet comprises colloidal silica, a phosphate, phenylphosphonic acid or a salt thereof, and an aqueous medium.

The present invention relates to a process for the preparation of blue-fluorescence emitting carbon dots (CDTs) from sub-bituminous tertiary high sulfur Indian coals. More particularly, the present invention relates to the production of characteristics carbon dots from low-quality Indian coals by an ultrasonic-assisted wet-chemical method. Also, the present invention provides a simple and environmentally benign method for fabrication of characteristics and size-controlled carbon dots.

Disclosed is a coating composition which includes: polyurethane; and amphiphilic nanoparticles having an amine functional group and a fluorine functional group in their structure. Further provided are a polyurethane-silica composite film including e coating composition and a method of preparing the same.

A multilayer coating film includes a lustrous layer containing a luster material and a colored layer containing a reddish coloring agent, and having translucency. Regarding a Y value of an XYZ colorimetric system calibrated with a standard white plate, when a light incident angle is 45, Y(5) represents a Y value of reflected light measured at a light receiving angle of 5, and Y(15) represents a Y value of reflected light measured at a light receiving angle of 15, the lustrous layer satisfies the following: Y(5) is 30 or more to 700 or less; Y(15)=kY(5) (where k is a coefficient); and k is 0.01 or more to 0.3 or less. The concentration of the reddish coloring agent in the colored layer is 1 mass % or more to 17 mass % or less.

A multilayer coating film includes a lustrous layer containing a luster material, and a colored layer stacked on the lustrous layer, containing a reddish coloring agent, and having translucency. For the lustrous layer, when a light incident angle (an angle with respect to a line perpendicular to the surface of the lustrous layer) is 45 and L*() represents the L* value of the lightness index of reflected light measured at a light receiving angle (the angle of inclination toward a light source side from a specular reflection direction) , L*() at 4580 and 100110 is 10 or less, and when the luster material is projected onto the bottom surface of the lustrous layer, the percentage of the projected area of the luster material on the bottom surface is 3% or more to 70% or less per unit area.

Provided is a composition with which a film having a lower refractive index and reduced defects can be formed. In addition, provided are a film forming method and a method of manufacturing an optical sensor. This composition includes colloidal silica particles and a solvent. In the colloidal silica particles, an average particle size D.sub.1 that is measured using a dynamic light scattering method is 25 to 1000 nm and a ratio D.sub.1/D.sub.2 of the average particle size D.sub.1 to an average particle size D.sub.2 that is obtained from a specific surface area of the colloidal silica particles measured using a nitrogen adsorption method is 3 or higher. The solvent includes a solvent A1 having a boiling point of 245 C. or higher and a solubility parameter of lower than 11.3 (cal/cm.sup.3).sup.0.5 and a solvent A2 having a boiling point of 120 C. or higher and lower than 245 C. and a solubility parameter of 11.3 (cal/cm.sup.3).sup.0.5 or higher.

A hard coating film including: a polymer binder resin; first inorganic particles which are dispersed in the polymer binder resin and have an average particle size of 5 nm or more and less than 70 nm; and second inorganic particles which are dispersed in the polymer binder resin and have an average particle size of 70 nm to 150 nm, wherein a content of the second inorganic particles having an average particle size of 70 nm to 150 nm is 4% by weight to 12% by weight, and a maximum amplitude (A) based on an average friction force is 0.15 or less in a graph of measuring a friction force with a TAC film which is measured by applying a load of 400 g to the surface thereof, is provided.

A method and resins for use with three-dimensional printing systems and/or other energy-curing devices to create 3-D objects having electrical conductivity. The resins comprise an initiator, a photopolymerizable agent, and a nanocarbon, particularly, single-walled carbon nanotubes. The initiator, photopolymerizable agent, and nanocarbon are mixed and agitated without fully solubilizing the nanocarbon so as to maintain the electrically conductive property.