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
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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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