Sumitomo Metal Mining patented a near-infrared shielding ultrafine particle dispersion body with excellent properties for outdoor use. The dispersion contains composite tungsten oxide ultrafine particles and a solid medium with a weather resistance improver, providing high productivity and low haze value. GlobalData’s report on Sumitomo Metal Mining gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Sumitomo Metal Mining, Extraction by leaching was a key innovation area identified from patents. Sumitomo Metal Mining's grant share as of January 2024 was 30%. Grant share is based on the ratio of number of grants to total number of patents.
Patent granted for near-infrared shielding ultrafine particle dispersion body
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A recently granted patent (Publication Number: US11884790B2) discloses a near-infrared shielding ultrafine particle dispersion body that contains composite tungsten oxide ultrafine particles dispersed in a solid medium. These ultrafine particles are represented by a general formula MxWyOz, where M includes various elements such as alkaline earth metals, rare earth elements, transition metals, and non-metals, while W represents tungsten and O represents oxygen. The dispersion body can be in the form of a sheet, board, or film, with the composite tungsten oxide ultrafine particles present in varying amounts from 0.001% to 80% by mass. Additionally, the patent describes the use of a resin binder and a weather resistance improver in the dispersion body to enhance its properties.
Furthermore, the patent also covers a near-infrared shielding laminated structure that includes transparent substrates and an interlayer sandwiched between them. The interlayer consists of one or more intermediate films, with at least one film utilizing the near-infrared shielding ultrafine particle dispersion body as described earlier. The laminated structure aims to provide near-infrared shielding properties while maintaining high visible light transmittance. The method for producing the dispersion body involves dispersing the composite tungsten oxide ultrafine particles in a solid medium, with specific requirements for the crystal structure and BET specific surface area of the particles. Overall, the patent highlights the innovative use of composite tungsten oxide ultrafine particles for near-infrared shielding applications in various forms and structures.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
