Temporary wet strength resin for paper applications

Details Temporary wet strength resin for paper applications Temporary wet strength resin for paper applications

C - Chemistry, Metallurgy

08

L

C08L 33/24 (2006.01)

Patent

CA 2624451

A thermosetting resin comprising a reacted A) first partially crosslinked glyoxalated polymer comprising a reacted (i) first polyacrylamide backbone and (ii) a first glyoxal component; and B) a second crosslinked glyoxalated polymer comprising a reacted (i) second polyacrylamide backbone and (ii) a second glyoxyal component; such that the first polyacrylamide backbone has a molecular weight that is less than the molecular weight of the second polyacrylamide backbone; and the first polyacrylamide backbone and the second polyacrylamide backbone have a weight ratio ranging from 75:25 to 95:5. Methods for making and using the resin. Fibrous substrates made with the resin.

L~invention concerne une résine thermodurcissable comprenant le produit de la réaction de A) un premier polymère glyoxalaté partiellement réticulé comprenant le produit de la réaction de (i) un premier squelette polyacrylamide et de (ii) un premier composant glyoxal ; et de (B) un second polymère glyoxalaté réticulé comprenant le produit de la réaction de (i) un second squelette polyacrylamide et de (ii) un second composant glyoxal ; de manière à ce que le premier squelette polyacrylamide ait une masse moléculaire inférieure à la masse moléculaire du second squelette polyacrylamide ; le premier squelette polyacrylamide et le second squelette polyacrylamide ayant un rapport massique compris entre 75:25 et 95:5. L~invention concerne également des procédés de fabrication et d~utilisation de la résine. L~invention concerne en outre des substrats fibreux fabriqués à partir de la résine.

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