Cellulose particles, method for producing them and their use
AssigneeTFM Handels-Aktiengesellschaft
InventorsJörg Oberkofler, Thomas Moser, Anton Schmalhofer, Jeffrey F. Spedding
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Abstract
Cellulose particles are described that have cationic groups in their interior. In one aspect, at least 10%, and preferably 50% or more, of the cationic groups are present within the particle interior. Also disclosed are particular combinations of such cellulose particles with certain water-soluble polymers that are well suited for use in the papermaking industry.
Claims14
A cellulose particle comprising cationic groups, wherein at least 10% of said cationic groups are present in the interior of said particle.
Cellulose particles having cationic groups, distributed across the entire cross-section of said particles, the concentration of said cationic groups being constant or increasing from the exterior to the interior of the particles, and wherein at least one cationic group is present per 100 anhydroglucose units of the cellulose.
A cellulose particle comprising cationic groups, wherein said particle is in the shape of a fiber, at least 10% of said cationic groups are present in the interior of said particle, the concentration of said cationic groups in said particle is constant or increases from the exterior of said particle to the interior of said particle, and said particle has a length of from about 0.15 mm to about 1 mm.
Dependencies are inferred from the claim text.