D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 19/56 (2006.01)
Patent
CA 2708833
The invention comprises a method for the manufacture of a paper-coating slip containing an inorganic material, with the use, as thickener for said slip, of a water-soluble polymer comprising at least one ethylenically unsaturated anionic monomer, and at least one ethylenically unsaturated oxyalkylated monomer terminated with a saturated or unsaturated, branched hydrophobic alkyl, alkylaryl, arylalkyl or aryl chain containing from 14 to 21 carbon atoms and having 2 branches containing at least 6 carbon atoms. Said polymer is introduced into the slip directly, or using a prior step of milling, dispersing or concentrating the inorganic material in water, possibly followed by a drying step. The water retention of said slip is thus improved, thereby contributing to better printability of the paper coated with said slip.
L'invention consiste en un procédé de fabrication d'une sauce de couchage papetière contenant une matière minérale, avec la mise en oeuvre comme agent épaississant de ladite sauce, d'un polymère hydrosoluble constitué d'au moins un monomère anionique à insaturation éthylénique, et d'au moins un monomère oxyalkylé à insaturation éthylénique et terminé par une chaîne hydrophobe ramifiée alkyle, alkylaryle, arylalkyle, aryle, saturée ou non, ayant de 14 à 21 atomes de carbone et possédant 2 rami- fications ayant au moins 6 atomes de carbone. Ledit polymère est introduit dans la sauce soit directement, soit à partir d'une étape préalable de broyage, de dispersion ou de concentration de la matière minérale dans l'eau, suivi ou non par une étape de séchage. On améliore ainsi la rétention d'eau de ladite sauce, ce qui contribue à une meilleure imprimabilité du papier couché par ladite sauce.
Gane Patrick Arthur Charles
Suau Jean-Marc
Benoit & Cote Associes Inc.
Omya Development Ag
LandOfFree
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