Cationic fibers
OwnerArie Cornelis Besemer, Anne Mieke Yvonne Wilhelmina Verwilligen +2inventors
InventorsArie Cornelis Besemer, Anne Mieke Yvonne Wilhelmina Verwilligen, Harm Jan Thiewes, Dorine Lisa Van Brussel-Verraest
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Abstract
A cationic cellulosic fibre containing between 1 and 30 cationic groups and between 0.1 and 20 aldehyde groups per 100 anhydroglucose units is a suitable basis for producing paper and tissue products without the necessity of using non-biodegradable cationic polymers as wet strength additives. The cationic cellulosic fibre can be obtained by oxidation of the fibre to introduce aldehyde groups, followed by reaction of part of the aldehyde groups with a nitrogen-containing reagent such as betaine hydrazide hydrochloride. The fibre is advantageously combined with an anionic polymer such as monoaldehyde carboxyl-starch or with anionic cyclodextrin.
Claims14
A cationic cellulosic fibre containing between 1 and 30 cationic groups and between 0.1 and 20 aldehyde groups per 100 anhydroglucose units.
A cationic cellulosic fibre containing between 1 and 30 cationic groups per 100 anhydroglucose units, obtainable by oxidation of the fibre to introduce aldehyde groups, followed by reaction of aldehyde groups with a nitrogen-containing reagent.
A cationic cellulosic fibre containing between 1 and 30 cationic groups per 100 anhydroglucose units, obtainable by reacting the fibre with a nitrogen-containing reagent, followed by oxidation of the fibre to introduce aldehyde groups.
A process for producing a cationic fibre, comprising oxidising a cellulosic fibre to introduce aldehyde groups, and reacting at least a part of the aldehyde groups with a nitrogen-containing reagent.
A process for producing a cationic fibre, comprising reacting a cellulosic fibre with a nitrogen-containing reagent and oxidising the fibre to introduce aldehyde groups.
Dependencies are inferred from the claim text.