Provided are: an Mn ferrite powder characterized by including a plurality of ferrite particles, having a volume-average particle diameter of 1-10 m, and having a 2.106 m volume-based cumulative distribution (sieved) of 0.1-50.0 vol %; and a resin composition characterized by including said powder and a resin material.

Provided is a millable silicone rubber composition capable of yielding a silicone rubber (cured product) superior in heat resistance. The composition contains: (A) 100 parts by mass of an organopolysiloxane having at least two silicon atom-bonded alkenyl groups in one molecule, and having an average polymerization degree of not lower than 100; (B) 5 to 100 parts by mass of a reinforcing silica having a specific surface area of not smaller than 50 m.sup.2/g; (C) 0.01 to 10 parts by mass of a titanium oxide doped with a transition metal oxide of 0.01 to 5% by mass; (D) 0.01 to 10 parts by mass of a cerium oxide and/or a cerium hydroxide; and (E) 0.01 to 10 parts by mass of a curing agent.

An explosive sheet simulant that uses an ethylene vinyl acetate polymer combined with either a mixture of a boron carbide and iron oxide for X-ray attenuating properties or calcium carbonate for millimeter wave properties, wherein the components of the mixture are selected such that the sheet has a predetermined flexural modulus combined with particle density, effective atomic number, x-ray transmission properties, or millimeter wave properties.

A sliding member includes a metallic substrate, a porous layer formed on a surface of the metallic substrate and a sliding layer that covers the porous layer. The porous layer is made of a metal itself or an alloy composition. The sliding layer is made of a lead-free resin composition. The resin composition consists of a pitch-based carbon fiber and a fluororesin, and assuming weight of the resin composition as 100, more than 10 weight % and 35 weight % or less of the pitch-based carbon fiber is contained.

A temporary bonding composition is provided. The temporary bonding composition includes a polyfunctional crosslinker, a polymer and a solvent. The polyfunctional crosslinker includes a compound containing at least two functional groups selected from the group of blocked isocyanate groups, alkenyl ether groups, and alkoxyhydrocarbyl groups. Each of the blocked isocyanate groups is an isocyanate group protected by a blocking agent. The polymer has a functional group reacting to the polyfunctional crosslinker.

The present invention provides a waterborne self-polishing antifouling paint and a preparation method and application thereof, and belongs to the technical field of marine antifouling paints. The waterborne self-polishing antifouling paint provided by the present invention includes the following components in parts by weight: 30-60 parts of waterborne self-polishing emulsion, 30-70 parts of waterborne slurry, 0.1-0.5 parts of waterborne leveling agent, 0.2-1 parts of waterborne defoamer, 0.5-1 parts of film-forming additive and 10-20 parts of water. The waterborne self-polishing antifouling paint provided by the present invention has an ultra-low content of volatile organic compounds (VOCs) (less than 20 g/L), and is environmentally friendly. The waterborne self-polishing antifouling paint can be formed into a paint film with good mechanical properties, stable self-polishing rate, and excellent water immersion resistance and antifouling performance.

In an aspect, a ferrite composition comprises a RuCo.sub.2Z ferrite having the formula: (Ba.sub.3-xM.sub.x)Co.sub.2(MRu).sub.yFe.sub.24-2y-zO.sub.41, wherein M is at least one of Sr, Pb, or Ca; M is at least one of Co, Zn, Mg, or Cu; x is 1 to 3; y is greater than 0 to 2; and z is 4 to 4. In another aspect, an article comprises the ferrite composition. In yet another aspect, method of making the ferrite composition comprises mixing ferrite precursor compounds comprising Fe, Ba, Co, and Ru; and sintering the ferrite precursor compounds in an oxygen atmosphere to form the RuCo.sub.2Z ferrite.

A first object of the present invention is to provide a composition that is capable of forming a cured substance having a high magnetic permeability and a low magnetic loss and has excellent hole filling suitability and excellent storage stability. A second object of the present invention is to provide a magnetic particle-containing cured substance formed of the composition. A third object of the present invention is to provide a magnetic particle-introduced substrate and an electronic material that contain the magnetic particle-containing cured substance.

The composition according to an embodiment of the present invention is a composition containing magnetic particles and an organic solvent, in which the magnetic particles include magnetic particles X having a sphericity of 100 to 120, the magnetic particles X include ferrite particles, a content of magnetic particles that are included in the magnetic particles X and have an equivalent circle diameter of less than 11 m is 15% to 70% by mass with respect to a total mass of the magnetic particles X, and a volume average particle size of the magnetic particles X is 5 to 50 m.

A curable composition includes a curable resin and a magnetic body, wherein the magnetic body comprises magnetic particles and a surface treatment agent present on a surface of the magnetic particles. The curable composition has low viscosity, and fluidity, and capable of effectively cured without causing curing shrinkage or the like to form a cured product having desired physical properties.

A near infrared reflective coating composition comprising a polymer resin, a polyamide resin and a suitable solvent. Preferred embodiments for the polymer resin include epoxy resins, acrylic resins, polyester resins or polyisocyanate resins. The composition further comprises additives such as a hardener, surfactant, fumed silica, metal oxide or mixed metal oxide pigments such as titanium oxide, chromium oxide, iron oxide or aluminium oxide. A method for forming the coating is also provided.