Kao has developed a toner with improved low-temperature fusing, storage stability, and durability. The binder resin composition includes a unique combination of crystalline and amorphous resins. This innovation enhances the quality of electrostatic image development. GlobalData’s report on Kao 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 Kao, Nanoemulsion cosmetics was a key innovation area identified from patents. Kao's grant share as of January 2024 was 38%. Grant share is based on the ratio of number of grants to total number of patents.
A recently granted patent (Publication Number: US11886144B2) discloses a toner for developing electrostatic images, featuring a unique binder resin composition. The binder resin composition includes a resin composition (C-P) formed by condensing an acid group-having crystalline resin (C) and a polyalkyleneimine, along with an amorphous resin (A). The acid group-having crystalline resin (C) is a crystalline polyester-based resin derived from specific alcohol and carboxylic acid components. The patent specifies various parameters for the toner, such as the Fedors solubility parameter difference between the crystalline resin (C) and the amorphous resin (A), the mass ratio of amorphous resin to the resin composition, and the proportion and molecular weight of the polyalkyleneimine used in the composition.
Moreover, the patent also details a method for producing the toner, involving the addition of the binder resin composition to toner raw materials. The method includes the condensation of the acid group-having crystalline resin (C) and polyalkyleneimine to obtain the resin composition (C-P), followed by mixing with the amorphous resin (A). Specific conditions are outlined for the condensation process, including the duration and amount of polyalkyleneimine used. Additionally, the patent specifies the types of crystalline and amorphous resins that can be employed in the toner composition, along with the molecular weight range of the polyalkyleneimine. Overall, the patent provides a detailed and specific formulation for a toner that can be utilized in developing electrostatic images, emphasizing the importance of the unique binder resin composition in achieving desired printing results.
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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.
