Sumitomo Osaka Cement filed a patent for a dispersion liquid containing metal oxide particles surface-modified by silane compounds with specific properties. The liquid meets a standardized transmission spectrum requirement. The patent aims to improve the performance of metal oxide particles in various applications. GlobalData’s report on Sumitomo Osaka Cement gives a 360-degree view of the company including its patenting strategy. Buy the report here.

According to GlobalData’s company profile on Sumitomo Osaka Cement, Electrode active materials was a key innovation area identified from patents. Sumitomo Osaka Cement'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.

Surface-modified metal oxide particles dispersion liquid patent

Source: United States Patent and Trademark Office (USPTO). Credit: Sumitomo Osaka Cement Co Ltd

The patent application (Publication Number: US20240018341A1) describes a dispersion liquid containing metal oxide particles that have been surface-modified by a silane compound containing a methyl group or a methyl group and an aromatic hydrocarbon group. The transmission spectrum of the metal oxide particles is measured to ensure specific standardized values are met. The dispersion liquid is used in a composition with a silicone resin component to create a sealing member for light-emitting devices, which can further be used in illumination tools, display devices, and more.

The patent also outlines methods for producing the dispersion liquid and modifying surfaces of metal oxide particles. These methods involve mixing surface-modifying materials with metal oxide particles, dispersing them in a liquid mixture, and adding additional surface-modifying materials to achieve the desired dispersion liquid. The process includes hydrolyzing the surface-modifying materials and using a disperser during the dispersion step. Additional steps such as adding a hydrophobic solvent and removing generated alcohol are also included in the methods. The patent emphasizes the specific composition and process parameters required for the successful production of the dispersion liquid and modification of metal oxide particle surfaces.

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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.