Additivation of cellulose nanofibrils with carboxyl...

C - Chemistry – Metallurgy – 08 – L

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C08L 1/02 (2006.01) A23L 1/0534 (2006.01) A61K 8/73 (2006.01) A61Q 19/00 (2006.01) C04B 24/38 (2006.01) C09K 8/10 (2006.01) C09K 8/20 (2006.01) C11D 3/22 (2006.01)

Patent

CA 2261092

The invention concerns compositions containing essentially amorphous cellulose nanofibrils, carboxyl cellulose with a degree of substitution not more than 0.95 as additive, and optionally at least one co-additive, the content in additive and optional co-additive being less than 30 wt.% relative to the weight of nanofibrils and additive and optional co-additive. The invention also concerns a method for preparing such compositions, consisting in adding to a substantially amorphous nanofibril suspension, the additive and optionally the co-additive(s), then in drying the suspension thus additivated. The resulting compositions are easily redispersable and preserve all their rheological properties.

La présente invention a pour objet des compositions comprenant des nanofibrilles de cellulose essentiellement amorphes, de la cellulose carboxylée présentant un degré de substitution inférieur ou égal à 0,95 en tant qu'additif, et éventuellement au moins un co-additif, la teneur en additif et en co-additif éventuel étant inférieure ou égale à 30 % en poids par rapport au poids de nanofibrilles et d'additif et de co-additif éventuel. Elle a de même pour objet un procédé de préparation de telles compositions, consistant à ajouter à une suspension de nanofibrilles essentiellement amorphes, l'additif et éventuellement le ou les co-additifs, puis à sécher la suspension ainsi additivée. Les compositions ainsi obtenues sont facilement redispersables et conservent leurs propriétés rhéologiques initiales.

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