A filling material for a resin composition includes a base material and a coating material coating at least a portion of a surface of a particle of the base material. The base material comprises a first inorganic compound containing a Group II element. The coating material comprises a second inorganic compound containing the Group II element and is different from the first inorganic compound. A method of manufacturing the filling material is provided. A resin composition comprising the filling material, a package, a light-emitting device, and methods of manufacturing them are also provided.

A resin composition, comprising: a thermosetting resin that has a mesogenic group in a molecule and that is capable of forming a smectic structure via a curing reaction; and mica.

Alumina products containing a fine particle size component and a coarse particle size component, and with specific particle size characteristics and irregular and non-spherical particle shapes, are disclosed. These alumina products can be used in polymer formulations to produce composites having high isotropic thermal conductivity.

An aluminum nitride particle including: a plurality of planes randomly arranged in a surface of the particle, the plurality of planes forming an obtuse ridge part or an obtuse valley part in the surface of the particle, the plurality of planes being observable in a scanning electron micrograph with 500 times magnification; wherein the particle has a longer diameter L of 20 to 200 μm; a ratio L/D of the longer diameter L (unit: μm) to a shorter diameter D (unit: μm) of the particle is 1 to 1.25; and the plurality of planes comprise a first plane, wherein an area S (unit: μm.sup.2) of the first plane satisfies S/L≥1.0 μm.

The present invention provides a particulate nucleating agent and a method for manufacturing the same. The particulate nucleating agent has an average radial crushing strength of 0.2-25.0N/cm. A weight content of the active ingredients in the particulate nucleating agent is no less than 90 wt %. The particulate nucleating agent is a transparent particulate nucleating agent. The particulate nucleating agent of the present invention can be fed smoothly during production without the change of the chemical composition thereof, so as to realize uniform dispersion in the polymer and reduce defects such as white dots in the polymer. The present invention breaks the traditional view of refining particles of nucleating agent to obtain a polymer having desirable properties, and avoids adding large amount of materials except the active ingredients during the granulation process of the nucleating agent.

Provided is an ink composition used for image formation by an ink jet method. The ink composition includes plate-like metal particles and an organic solvent having a boiling point of 150° C. or higher and a solubility parameter of 24 MPa.sup.1/2 or more. The maximum absorption wavelength of the ink composition in the wavelength range of 300 nm to 2,500 nm is located in the wavelength range of 800 nm to 2,500 nm. Also provided is an image forming method.

Provided is a heat dissipation sheet capable of effectively enhancing adhesiveness and long-term insulation reliability. The heat dissipation sheet according to the present invention contains first inorganic particles having an aspect ratio of 2 or less, second inorganic particles having an aspect ratio of more than 2, and a binder resin. In this heat dissipation sheet, a content of the second inorganic particles is larger than a content of the first inorganic particles in 100% by volume of a region having a thickness of 15% on a first surface side in a thickness direction, and the content of the first inorganic particles in 100% by volume of the region having a thickness of 15% is larger than the content of the first inorganic particles in 100% by volume of a central region having a thickness of 70%.

The invention provides a diaphragm for alkaline water electrolysis with reduced dissolution of an inorganic component in an alkali solution at low cost. The present invention relates to a diaphragm for alkaline water electrolysis, including magnesium hydroxide and an organic polymer resin.

A thermally conductive resin composition is disclosed herein. The thermally conductive resin composition exhibits high thermal conductivity while having excellent handling properties. In an embodiment, a resin composition includes a resin component and 600 parts by weight or more of a thermally conductive filler relative to 100 parts by weight of the resin component. The thermally conductive filler comprise 30 to 50 wt % of a first thermally conductive filler having a D50 particle diameter of 35 μm or more, 25 to 45 wt % of a second thermally conductive filler having a D50 particle diameter in a range of 15 μm to 30 μm, and 15 to 35 wt % of a third thermally conductive filler having a D50 particle diameter of 1 to 4 μm, based on the total weight of the thermally conductive filler.

In the present invention, it is possible to provide a silicone rubber composite which exhibits a conductivity equal to or higher than that using a high content of carbon black, by using a low content of carbon nanotubes as a conductive filler instead of a high content of carbon black to impart conductivity to insulating silicone rubber.