A radically polymerizable composition comprising at least one polyfunctional radically polymerizable monomer having no acid group, at least one acid group-containing radically polymerizable monomer and/or at least one acidic oligomer, at least one fluoroaluminosilicate glass filler and/or radiopaque glass filler, and at least one initiator for the radical polymerization, wherein the fluoroaluminosilicate glass filler and/or radiopaque glass filler is coated with a silica (hetero)polycondensate. The composition is characterized by high stability and is particularly suitable as a dental material.

The invention provides dispersed inorganic mixed metal oxide pigment compositions in a non-aqueous media utilizing a dispersant having terminal end groups and a central portion of the structure [CH(A)-C(B)(D)]n-[CR.sub.2CR.sub.2]m- to disperse a mixed metal oxide pigment in the media. The metal oxide pigment is of the type used to color ceramic or glass articles. A milling process using beads is also described to reduce the mixed metal oxide particle size to the desired range. A method of using the mixed metal oxide dispersion to digitally print an image on a ceramic or glass article using the dispersion jetted through a nozzle and subsequently firing the colored article is also described.

A method of purifying a particle is disclosed and includes a plurality of following steps: preparing a purification solution; fully mixing a mixed solution to be purified with the purification solution, and letting stand until a plurality of separated layers appear, removing a layer of liquid where a second purification solution is located, and extracting a layer of liquid where a first purification solution is located; and freezing and drying the extracted layer of liquid to obtain a purified particle.

Provided are a surface-treated inorganic powder, which satisfies the following expression (1) and the following expression (2), and a method of producing the same, and a dispersion and a resin composition each containing the surface-treated inorganic powder: ?Expression (1) 3.0?D1?50.0; ?Expression (2) 1.00?D1/D2<1.10, in the expression (1) and the expression (2), D1 represents a presence amount (?mol/m.sup.2) of double bonds contained in the surface-treated inorganic powder, and D2 represents a presence amount (?mol/m.sup.2) of double bonds contained in a washed powder, wherein the washed powder is a powder obtained by subjecting the surface-treated inorganic powder to predetermined washing treatments.

The disclosure provides self-dispersing pigment having an isoelectric point of at least about 8 comprising an inorganic particle, and in particular a titanium dioxide (TiO.sub.2) pigment, treated sequentially by: hydrolyzing an aluminum compound or basic aluminate to deposit a hydrous alumina surface; and adding a dual-functional compound comprising an anchoring group that attaches the dual-functional compound to the pigment surface, and a basic amine group comprising a primary, secondary or tertiary amine. These self-dispersing pigments are useful in making dcor paper that may be used in paper laminates.

A porous plate-shaped filler is a plate shape having an aspect ratio of 3 or more, and has a minimum length of 0.1 to 50 m and a porosity of 20 to 90%. Furthermore, the porous plate-shaped filler 1 includes plate-shaped pores 2 having an aspect ratio of 1.5 or more. Consequently, in the porous plate-shaped filler, a thermal conductivity is low. The heat insulation film includes the porous plate-shaped filler, whereby a heat insulation effect of the heat insulation film can improve.

A porous plate-shaped filler is a plate shape having an aspect ratio of 3 or more, and has a minimum length of 0.1 to 50 m and a porosity of 20 to 90%. Furthermore, the porous plate-shaped filler 1 includes plate-shaped pores 2 having an aspect ratio of 1.5 or more. Consequently, in the porous plate-shaped filler, a thermal conductivity is low. The heat insulation film includes the porous plate-shaped filler, whereby a heat insulation effect of the heat insulation film can improve.

An electrode including: a conductive film which contains: a layered material having one or plural layers of particles of a layer body represented by: M.sub.mX.sub.n (M is at least one metal of Group 3, 4, 5, 6, or 7, X is a carbon atom, a nitrogen atom, or a combination thereof, n is not less than 1 and not more than 4, and m is more than n but not more than 5), and a modifier or terminal T existing on a surface of the layer body, (T is at least one selected from a hydroxyl group, a fluorine atom, a chlorine atom, an oxygen atom, and a hydrogen atom); and a ?-electron conjugated compound attached to the particles and having at least one selected from the group consisting of an aromatic ring, a heteroaromatic ring, a conjugated diene unit, an allyl group, and a vinyl group.

Provided are: surface-coated inorganic particles which can have improved dispersibility in organic solvents and enable the function and performance of the original inorganic particles to be sufficiently exhibited; and a method for producing the surface-coated inorganic particles. Also provided are an organic-solvent dispersion and a coating film which are excellent in terms of transparency and refraction property. The surfaces of inorganic particles, e.g., titanium oxide, are coated with a product of reaction between an aminated silicate compound, e.g., aminopropyltrimethoxysilane, and/or a product of the hydrolysis thereof and a compound having one ?,?-unsaturated carbonyl group in the molecule, e.g., an alkoxypolyalkylene glycol (meth)acrylate.

A method of forming a titania-coated inorganic particle comprising the steps of: (a) agitating a mixture of inorganic particle and organic solvent; (b) adding titania precursor dropwise into the mixture of step (a) under agitation; and (c) adding catalyst to the mixture of step (b) thereby converting said titania precursor to titania which then forms a coating on said inorganic particle; wherein steps (a) to (c) are performed at neutral pH and ambient temperature.