An object of the present invention is to provide ferrite particles having a high magnetic permeability in a frequency band of 1 MHz to 1 GHz. Another object is to provide a resin composition containing the ferrite particles and an electromagnetic wave shielding material composed of the resin composition. The ferrite particles are composed of a single crystalline body having an average particle size of 1 to 2000 nm and has a spherical particle shape, wherein the ferrite particles contain substantially no Zn, 3 to 25 wt % of Mn, and 43 to 65 wt % of Fe, and a real part μ′ of a complex magnetic permeability measured using a molding composed of the ferrite particles and a binder resin has a maximal value in a frequency band of 100 MHz to 1 GHz.

A dust core includes a binder and magnetic particles. The binder includes an epoxy resin. The magnetic particles are dispersed in the binder. The epoxy resin has at least two or more mesogenic skeletons between two epoxy bonds adjacent along a molecular chain.

A patterned surface structure formed from a ferrofluidic polymer resin having a plurality of magnetic nanoparticles. The polymer resin is patterned with a magnetic field that is applied to the ferrofluidic polymer resin during curing. The ferrofluidic polymer resin may be cast over a non-magnetic planar substrate. A magnetic field is applied to the ferrofluidic polymer resin to induce a pattern in a surface of the ferrofluidic polymer resin. The patterned ferrofluidic polymer resin is then cured to form the permanently patterned surface.

Embodiments provide apparel products. The apparel products each include a major component forming a base portion of the apparel product. The major component is configured to be supported and worn at least partially over a portion of a wearer. The apparel product includes a minor component forming a secondary portion configured to be coupled to the major component. An adhesive is disposed at least partially between a portion of the major component and a portion of the minor component. The adhesive includes a polymer having a cyclodextrin moiety bonded to an azobenzene moiety.

A composite manhole cover includes a body made of a polymer that has a mass of magnetic material embedded there within. The mass of magnetic material is detectable by a metal detector and, therefore, the composite manhole is locatable by the metal detector when the composite manhole cover is obscured by a material such as pavement, dirt, sand, grass/sod, etc.

Provided are a resin composition, which is used for transfer molding, including a resin (A), a magnetic powder (B) having a median diameter of 7.5 to 100 μm, and particles (C) having a median diameter of 0.2 to 5 μm, in which a saturation magnetic flux density of a molded article obtained by transfer molding the resin composition at 175° C. is equal to or more than 1.1 T; and a molded article formed of the resin composition. The particles (C) may include a magnetic powder or a non-magnetic powder.

A polymer composition comprising from about 20 vol. % to about 60 vol. % of a polymer matrix that includes a liquid crystalline polymer and from about 20 vol. % to about 60 vol. % of magnetic particles is provided. The ratio of the volume of the polymer matrix to the volume of the magnetic particles is from about 0.6 to about 1.5.

In an aspect, a ferrite composition can comprise a SbCo—M-type ferrite having the formula: Me.sub.1-xSb.sub.xCo.sub.y+xM′.sub.yFe.sub.12-x-2yO.sub.19, wherein Me is at least one of Sr, Pb, or Ba; M′ is at least one of Ti, Zr, Ru, or Ir; x is 0.001 to 0.3; and y is 0.8 to 1.3. In another aspect, a method of making the ferrite composition comprises mixing ferrite precursor compounds comprising Me, Fe, Sb, Co, and M; and sintering the ferrite precursor compounds in an oxygen atmosphere to form the SbCo—M-type ferrite. In yet another aspect, a composite comprises the ferrite composition and a polymer. In still another aspect, an article comprises the ferrite composition.

In an aspect, a Co.sub.2Z-type ferrite comprises oxides of at least Me, Co, Mo, Li, and Fe; wherein Me is at least one of Ba or Sr. In another aspect, the Co.sub.2Z-type ferrite comprises a Z-type hexaferrite an amount of lithium molybdate. In another aspect, the Co.sub.2Z-type ferrite has a formula Li.sub.2MoO.sub.4.Ba.sub.xSr.sub.3-xCo.sub.2+y−zMe′.sub.yMe″.sub.zFe.sub.24-2y-mO.sub.41, wherein Me′ is at least one of Ti, Mo, Ru, Ir, Zr, or Sn; Me″ is at least one of Zn, Mn, or Mg; x is 0 to 3; y is 0 to 1.8; z is 0 to 1.8; and m is −4 to 4. In yet another aspect, a method of making a Co.sub.2Z-type ferrite comprises milling an initial Co.sub.2Z-type ferrite and Li.sub.2MoO.sub.4 to form a mixed ferrite; and calcining the mixed ferrite to form the Co.sub.2Z-type ferrite.

The present application relates to a curable composition. The present application provides a curable composition comprising an internal heat source for generating heat by application of an alternate-current magnetic field from the outside, together with a phthalonitrile compound and a curing agent therefor. The curable composition can precisely control the heat generated from the internal heat source according to the strength of the alternate-current magnetic field to precisely control curing conditions of the curable composition.