Aldehyde-containing polymers as wet strength additives
AssigneeSCA Hygiene Products Zeist B.V.
InventorsJeffrey Wilson Thornton, Dorine Lisa Van Brussel-Verraest, Arie Besemer, Sussan Sandberg
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Abstract
The invention concerns the use of a water-soluble or water-dispersible polymer having a molecular weight of at least 800, containing at least 5 aldehyde groups per molecule and at least 1 carboxyl group per molecule, the ratio of aldehyde groups to carboxyl groups being higher than 0.75:1, as a wet strength additive. The invention also discloses novel cationic derivatives thereof.
Claims11
A method of improving wet strength of a paper, tissue or non-woven product, comprising applying a water-soluble or water-dispersible biopolymer having a molecular weight of at least 800, containing 0.25-2.25 aldehyde groups per recurring unit of the biopolymer and/or at least 5 aldehyde groups per molecule, and containing at least 1 anionic group per molecule, the ratio of aldehyde groups to anionic groups being higher than 0.75:1, as a wet strength additive.
Dependencies are inferred from the claim text.