Aldehyde-modified cellulosic fibers for paper products...

D - Textiles – Paper – 21 – H

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D21H 11/20 (2006.01) C08B 3/12 (2006.01) C08B 3/22 (2006.01) D06M 11/34 (2006.01) D06M 13/192 (2006.01) D06M 13/203 (2006.01) D21C 9/00 (2006.01) D21H 21/20 (2006.01)

Patent

CA 2250153

Modified cellulosic fibers are formed by (1) esterifying cellulosic fibers with a 1,2-disubstituted alkene that has at least one carboxylic acid group reactive with cellulosic hydroxyl groups and (2) oxidizing the esterified fibers to form aldehyde groups. The modified fibers are useful in paper products, which tend to have temporary wet strength. Strength additives may be included in the paper product to impart a higher level of temporary wet strength or permanent wet strength.

On forme des fibres cellulosiques modifiées par (1) estérification de fibres cellulosiques avec un alkène à bisubstitution en position 1,2 qui comprend au moins un groupe acide carboxylique qui réagit avec des groupes hydroxyle cellulosiques et (2) oxydation des fibres estérifiées pour former les groupes aldéhyde. Ces fibres modifiées sont utiles dans des produits papier qui ont tendance à résister temporairement à l'état humide. On peut incorporer des additifs renforçateurs dans le produit papier pour accroître son niveau de résistance temporaire à l'état humide ou de résistance permanente à l 'état humide.

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