Suzano has been granted a patent for redispersible cellulose nanocrystals (CNC) that can disperse in both polar and non-polar solvents and polymers. The CNC includes non-covalent ionic adducts of cationic and anionic groups, with improved redispersion in high ionic strength aqueous systems. GlobalData’s report on Suzano gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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Data Insights Suzano SA - Company Profile

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According to GlobalData’s company profile on Suzano, Microfibrillated cellulose production was a key innovation area identified from patents. Suzano's grant share as of March 2024 was 39%. Grant share is based on the ratio of number of grants to total number of patents.

Redispersible cellulose nanocrystals for various solvents and polymers

Source: United States Patent and Trademark Office (USPTO). Credit: Suzano SA

A recently granted patent (Publication Number: US11926714B2) discloses a novel redispersible cellulose nanocrystal (CNC) with unique properties. The redispersible CNC is characterized by a non-covalent ionic adduct of cationic and anionic groups, formed from a protonated amine compound and titrable acidic groups, specifically sulfate half-esters located at the surface of the CNC. The CNC is isolated and dried, with the amine compound being a monoamine-terminated polyalkane, polyalkylether, or polyalkylene imine. Additionally, the patent describes the redispersible CNC in pelletized or molded form, offering versatility in applications.

Furthermore, the patent outlines a method for producing the isolated dried redispersible CNC, involving providing an aqueous suspension of acidic CNC with sulfuric acid, mixing an amine compound to adjust the pH, and drying the resulting suspension to obtain the redispersible CNC with sulfate half-esters. The molar ratio of the amine compound to titrable acidic groups is crucial in achieving the desired properties of the CNC, with specific parameters for pH control during the process. The patent also mentions the use of a monoamine-terminated polyalkylether in the production method, highlighting the importance of the molecular structure in the synthesis. The patent extends to include a polymer composite incorporating the redispersible CNC, showcasing its potential in enhancing polymer properties.

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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.