D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 21/16 (2006.01) D21H 17/43 (2006.01) D21H 21/10 (2006.01) D21H 23/76 (2006.01) D21H 17/07 (2006.01) D21H 17/28 (2006.01) D21H 17/29 (2006.01) D21H 17/37 (2006.01) D21H 17/45 (2006.01) D21H 17/56 (2006.01) D21H 17/66 (2006.01)
Patent
CA 2260884
The present invention pertains to an improved method of internally sizing a cellulosic article and an improved internally sized cellulosic article where a water-dispersible, water- and alkali-insoluble internal sizing agent from an interpolymer of an ethylenically unsaturated hydrocarbon monomer and an ethylenically unsaturated carboxylic acid comonomer is applied to fiber stock or pulp slurry some amount of time subsequent to the instance of application of a retention aid. The invention also includes a novel internal sizing composition where the interpolymer is rendered water-dispersible by reaction with an inorganic neutralizing cationic compound. The improved method is particularly well suited for paper making wherein substantially improved sizing performance is obtainable. Internal sizing agents based on inorganic neutralizing cationic compounds such as, for example, potassium hydroxide, provide the surprising advantage of hard water resistance.
Procédé amélioré de collage interne d'un article cellulosique et article cellulosique à collage interne amélioré. Ledit procédé consiste à appliquer un agent de collage interne dispersible dans l'eau et insoluble dans l'eau et dans les alcalis, obtenu à partir d'un interpolymère d'un monomère hydrocarbure éthyléniquement insaturé et d'un comonomère d'acide carboxylique éthyléniquement insaturé, à un amas de fibres ou à de la pâte à papier quelque temps après l'application d'un séquestrant. La présente invention concerne également une nouvelle composition pour collage interne dans laquelle l'interpolymère est rendu dispersible dans l'eau par réaction avec un composé cationique neutralisant inorganique. Ledit procédé amélioré est particulièrement bien adapté pour la fabrication de papier et il entraîne une amélioration substantielle des performances de collage. Des agents de collage interne tels que, par exemple, l'hydroxyde de potassium, offrent l'avantage surprenant de résistance à l'eau dure.
Cooper James L.
Finlayson Malcolm F.
Gathers John J.
Oliver Stephen M.
Springs Kenneth E.
Smart & Biggar
The Dow Chemical Company
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