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AssigneeMetsa Fibre Oy
InventorsLauri Hauru, Ilkka Kilpeläinen, Olli Suontausta, Alexander Deutschle
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A dispersion of cellulose fibers, a method of preparing the same and uses thereof. The dispersion is produced by providing a cellulose feedstock comprising cellulose fibers; by providing a mixture of an ionic liquid and a protic antisolvent for cellulose as a dispersion medium, the ionic liquid being selected from the group of protic salts of superbases capable of dissolving cellulose; and by mixing said cellulose feedstock into said dispersion medium so as to disperse the cellulose fibers therein to form a dispersion which is stable for at least 24 hours at room temperature. The dispersion can be used as an additive of cellulose pulps for making of fibrous products.
A dispersion comprising cellulose fibers dispersed in a mixture of an ionic liquid and a protic antisolvent for cellulose, said ionic liquid being selected from the group of protic salts of organic superbases capable of dissolving cellulose and said dispersion being stable at a temperature of 15 to 30° C. for at least 24 hours, wherein the cellulose fibers have been subjected to mechanical defibration, wherein the dispersion is a colloidal dispersion, and wherein stable signifies that less than 20% of the dispersed solid matter by weight, calculated from the total amount of dispersed matter in the dispersion, will settle out of the dispersion.
A method of producing a dispersion comprising cellulose fibers dispersed in a dispersion medium, comprising the steps of:
Dependencies are inferred from the claim text.