UPM-Kymmene has been granted a patent for a method to produce cross-linked nanofibrillar cellulose using multivalent cations. The resulting product features anionically modified cellulose with specific carboxylic acid content, moisture levels, and elongation properties, enhancing its potential applications. GlobalData’s report on UPM-Kymmene 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 UPM-Kymmene, Microscale biofuel reactors was a key innovation area identified from patents. UPM-Kymmene's grant share as of June 2024 was 48%. Grant share is based on the ratio of number of grants to total number of patents.
Cross-linked nanofibrillar cellulose with multivalent cations
The granted patent US12043675B2 describes a product that incorporates anionically modified nanofibrillar cellulose, characterized by a specific carboxylic acid content ranging from 0.5 to 2.0 mmol COOH/g pulp, as determined by conductometric titration. This cellulose is crosslinked with multivalent cations, resulting in a product with a moisture content between 0-20% (w/w) and an elongation of at least 3.2%. The claims detail various forms the product can take, including layers, coatings, films, sheets, membranes, and other structures such as gauze or nonwoven materials. Additionally, the product may contain therapeutic or cosmetic agents and is designed to have specific physical properties, including a density of 0.8-1.2 g/cm³ and a tensile index of 28-95 Nm/g.
The patent also outlines methods for preparing this product, which involve forming the anionically modified nanofibrillar cellulose, introducing multivalent cations, and allowing for a reaction period to achieve crosslinking. The methods specify the potential use of acid-releasing compounds to facilitate the solubilization of multivalent cations, enhancing the crosslinking process. Furthermore, the nanofibrillar cellulose is described as having an average fibril diameter of 1-200 nm and specific rheological properties when dispersed in water. The claims emphasize the versatility of the product, which can be incorporated into multi-layer structures, including those with gauze or nonwoven layers, thereby broadening its potential applications in various fields, including medical and cosmetic uses.
To know more about GlobalData’s detailed insights on UPM-Kymmene, buy the report here.
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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.
