Nihon Seiko Co., Ltd.

Nihon Seiko Co., Ltd., a Tokyo-based company founded in 1935 and known as Nakase Kogyo Co., Ltd. until 1936, is a key Japanese producer and distributor of antimony products and various metal powders. Their diverse antimony-based offerings include antimony trioxide, which functions as a flame retardant in plastics and rubbers, a catalyst for polyester production, and a solid lubricant in brake pads. Antimony metal is supplied for essential uses in semiconductors, optical memory disk films, thermoelectric converters, storage batteries, bearing metals, and a range of specialized alloys for applications such as hard lead castings, cable sheathing, typemetals, sheets, and pipes. The company also provides antimony in metal powder and shot forms, primarily for glass fining agents and alloy manufacturing. A unique blend of copper and antimony metal powder is specifically formulated for electric detonators. Their catalog extends to specialized antimony compounds: 'special treatment' antimony trioxide, and sodium antimonate, which is incorporated into engineering plastics and aids in glass decolorization and fining. Antimony trisulfide is employed in friction materials, matchbox flints, fireworks, glass fining, toys, and flash mixtures. Antimony pentasulfide is utilized for surface treatments on decorative trims and building materials. Nihon Seiko further supplies antimony trichloride and pentachloride, serving as catalysts for fluorination, chlorination, and bromination of organic compounds, and as components in pigments and semiconductor materials. Additionally, their STEM series comprises pre-blended flame retardants designed for polyolefin plastics like polypropylene (PP) and polyethylene (PE). Beyond its extensive antimony portfolio, the company manufactures atomized metal powders from a broad spectrum of materials, including copper, tin, bronze, brass, silver, platinum, gold, stainless steel, nickel, and various nickel alloys.