Provided are titanium oxide fine particles which are excellent in transparency and are less photocatalytically active while maintaining a high refractive index, a dispersion of such fine particles, and a method for producing such a dispersion. The method for producing a dispersion of iron-containing rutile titanium oxide fine particles including a step (1) of neutralizing an aqueous metal mineral acid salt solution containing Ti and Fe in Fe.sub.2O.sub.3/(TiO.sub.2+Fe.sub.2O.sub.3)=0.001 to 0.010 to form an iron-containing hydrous titanic acid; a step (2) of adding an aqueous hydrogen peroxide solution to form an aqueous solution of iron-containing peroxotitanic acid having an average particle size of 15 to 50 nm; a step (3) of adding a tin compound so as to satisfy TiO.sub.2/SnO.sub.2=6 to 16; a step (4) of adding a sol of silica-based fine particles which contain Si and a metal element M in SiO.sub.2/MO.sub.x/2=99.9/0.1 to 80/20, the addition being made so as to satisfy SiO.sub.2/(oxides of the other elements)=0.08 to 0.22; and a step (5) of hydrothermally treating the solution obtained in the step (4).

The purpose of the present invention is to provide a composite pigment which can be dispersed and made into paint in a manner that saves labor compared with conventional flat emulsion paints, and which can achieve concealing properties and low glossiness (a luster reduction effect) without separately adding a matting agent. This composite pigment contains an inorganic compound and/or an organic compound, and a fixed extender pigment.

A first object of the present invention is to provide a stretchable conductor sheet that exhibits isotropic conductivity when stretched in a predetermined direction or in a direction perpendicular to the predetermined direction, and a paste for forming a stretchable conductor sheet, which is used for the stretchable conductor sheet. A second object of the present invention is to provide a stretchable conductor sheet having a small change in specific resistance even when repeatedly twisted, and a paste for forming a stretchable conductor sheet, which is used for the stretchable conductor sheet. A third object of the present invention is to provide a stretchable conductor sheet having a small change in specific resistance even when repeatedly washed, and a paste for forming a stretchable conductor sheet, which is used for the stretchable conductor sheet. The first object of the present invention can accomplish a stretchable conductor sheet having a thickness of 3 to 800 μm, the stretchable conductor sheet comprising at least conductive particles, inorganic particles surface-treated with a hydroxide and/or an oxide of one or both of Al and Si, and a flexible resin having a tensile elastic modulus of 1 MPa or more and 1000 MPa or less, wherein in each of two orthogonal directions, a specific resistance change ratio of the sheet at a time of elongation by 40% with respect to an original length is less than ±10% in an elongation direction.

A radiation-emitting component includes a radiation source; a transparent material disposed in the beam path of the component and including a polymer material and filler particles, wherein the filler particles include an inorganic filler material and a phosphonic acid derivative or phosphoric acid derivative attached to a surface thereof and through which the filler particles are crosslinked with the polymer material.

A first object of the present invention is to provide a stretchable conductor sheet that exhibits isotropic conductivity when stretched in a predetermined direction or in a direction perpendicular to the predetermined direction, and a paste for forming a stretchable conductor sheet, which is used for the stretchable conductor sheet. A second object of the present invention is to provide a stretchable conductor sheet having a small change in specific resistance even when repeatedly twisted, and a paste for forming a stretchable conductor sheet, which is used for the stretchable conductor sheet. A third object of the present invention is to provide a stretchable conductor sheet having a small change in specific resistance even when repeatedly washed, and a paste for forming a stretchable conductor sheet, which is used for the stretchable conductor sheet. The first object of the present invention can accomplish a stretchable conductor sheet having a thickness of 3 to 800 μm, the stretchable conductor sheet comprising at least conductive particles, inorganic particles surface-treated with a hydroxide and/or an oxide of one or both of Al and Si, and a flexible resin having a tensile elastic modulus of 1 MPa or more and 1000 MPa or less, wherein in each of two orthogonal directions, a specific resistance change ratio of the sheet at a time of elongation by 40% with respect to an original length is less than ±10% in an elongation direction.

The invention relates to a pigment composition for preparing pigmented matt coatings, such as matt paints and printing inks. Further, the invention relates to a process for preparing such pigment composition, and to a coating formulation containing such composition. Finally, the invention is directed to a pigmented matt surface of a substrate, and to the use of the pigment compositions disclosed herein for matting substrates.

The purpose of the present invention is to provide: a composite pigment, and production method thereof, which can suppress luster of a coating film by modifying an inorganic coloring pigment, and which can be used in various applications such as low-gloss (luster reduction effect) pigments and matte pigments; a paint composition which can achieve both an excellent coating film texture and also the property of having low gloss and luster even when added to a coating film; and a coating film. In this composite pigment, the inorganic coloring pigment is fixed by an inorganic compound, and a plurality of particles of the inorganic coloring pigment are aggregated into granular form through the inorganic compound.

Provided are titanium oxide fine particles which are excellent in transparency and are less photocatalytically active while maintaining a high refractive index, a dispersion of such fine particles, and a method for producing such a dispersion. The method for producing a dispersion of iron-containing rutile titanium oxide fine particles including a step (1) of neutralizing an aqueous metal mineral acid salt solution containing Ti and Fe in Fe.sub.2O.sub.3/(TiO.sub.2+Fe.sub.2O.sub.3)=0.001 to 0.010 to form an iron-containing hydrous titanic acid; a step (2) of adding an aqueous hydrogen peroxide solution to form an aqueous solution of iron-containing peroxotitanic acid having an average particle size of 15 to 50 nm; a step (3) of adding a tin compound so as to satisfy TiO.sub.2/SnO.sub.2=6 to 16; a step (4) of adding a sol of silica-based fine particles which contain Si and a metal element M in SiO.sub.2/MO.sub.x/2=99.9/0.1 to 80/20, the addition being made so as to satisfy SiO.sub.2/(oxides of the other elements)=0.08 to 0.22; and a step (5) of hydrothermally treating the solution obtained in the step (4).

In a coloring ultraviolet protective agent, the average molar absorption coefficient in the wavelength range from 200 nm to 380 nm is increased, and the color characteristics in the visible region are controlled. The coloring ultraviolet protective agent is useful for shielding ultraviolet rays and coloring. The coloring ultraviolet protective agent comprises M2 doped oxide particles in which oxide particles (M1Ox) including at least M1 being a metal element or metalloid element, are doped with at least one M2 selected from metal elements or metalloid elements other than M1, wherein x is an arbitrary positive number, wherein an average molar absorption coefficient in the wavelength range of 200 nm to 380 nm of a dispersion in which the M2 doped oxide particles are dispersed in a dispersion medium, is improved as compared with one of a dispersion in which the oxide particles (M1Ox) are dispersed in a dispersion medium, and wherein a hue or chroma of color characteristics in the visible region of the M2 doped oxide particles is controlled.

An inorganic oxide particles which have a minute particle diameter at which no interference fringes occur in a coating film and high transparency can be secured even when applied to a high refractive index substrate, and in which excitation by ultraviolet radiation is almost completely suppressed, a coating composition containing such particles, and an optical member having a cured film formed from the coating composition. Inorganic oxide particles obtained by bonding an organosilicon compound having a nitrogen-containing heterocyclic group to the surface of modified metal oxide colloid particles (C) having an average particle diameter of 2 to 100 nm, which include metal oxide colloid particles (A) having an average primary particle diameter of 2 to 60 nm as nuclei and with the nuclei surface coated with a coating composed of inorganic oxide colloid particles (B) having an average primary particle diameter of 1 to 4 nm.