Nippon Paper Industries has patented a composition containing lignin sulfonic acid-based compound, water-soluble compound, and lignin derivative. The liquid product has specific viscosity and concentration parameters. GlobalData’s report on Nippon Paper Industries 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 Nippon Paper Industries, Sustainable packaging paper coating was a key innovation area identified from patents. Nippon Paper Industries's grant share as of January 2024 was 25%. Grant share is based on the ratio of number of grants to total number of patents.

Liquid composition with lignin sulfonic acid-based compound and aromatic compound

Source: United States Patent and Trademark Office (USPTO). Credit: Nippon Paper Industries Co Ltd

The granted patent (Publication Number: US11873443B2) discloses a liquid composition comprising a lignin sulfonic acid-based compound, an aromatic water-soluble compound, and a reaction product of the two. The composition, when dried and dissolved in water, forms a first aqueous solution with specific nonvolatile content concentration and B type viscosity. The reaction product must have an anionic functional group and a polyalkylene oxide chain with a certain average addition ole number. The composition is obtained by reacting the two compounds at a specific weight ratio, with the reaction rate being at least 80%.

Furthermore, the patent claims a dispersing agent made from the liquid composition, suitable for applications in oil field drilling mud or hydraulic compositions. The dispersing agent is used in a hydraulic composition containing a hydraulic material. The method for producing the liquid composition involves reacting the two compounds, while a method for producing a composition includes preparing the liquid composition and drying it to obtain a granular product with specific particle size characteristics. The reaction rate is defined as a mass ratio of the aromatic water-soluble compound forming the reaction product to the total aromatic water-soluble compounds present in the composition.

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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.