D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 17/29 (2006.01) C08B 30/00 (2006.01) C08B 31/00 (2006.01) C08J 3/02 (2006.01) C08L 3/00 (2006.01) D21H 21/10 (2006.01) D21H 21/16 (2006.01) D21H 21/18 (2006.01)
Patent
CA 2419946
Starch dispersions comprising discrete particles of crosslinked cationic starch in an aqueous liquid can be used in papermaking. They can be used as a wet-end additive or in surface coating. The starch dispersions can be prepared by a process comprise: (a) obtaining a mixture of cationic starch and an aqueous liquid, (b) processing the mixture using shear forces in the presence of a crosslinker: and (c) adding and mixing in a hydroxylic liquid to obtain the starch dispersions.
Dispersions d'amidon contenant des particules séparées d'amidon cationique réticulé dans un milieu aqueux, qui peuvent être utilisées pour la fabrication de papier. Lesdites dispersions peuvent être utilisées en tant qu'adjuvant introduit dans la masse ou en tant que substance de collage en surface. Elles peuvent être préparées selon un procédé qui consiste (a) à obtenir un mélange d'amidon cationique et de liquide aqueux, (b) à traiter le mélange à l'aide de forces de cisaillement en présence d'un agent de réticulation et (c) à ajouter ledit mélange à un liquide hydroxylique, puis à mélanger le tout, pour obtenir lesdites dispersions d'amidon.
Helbling Andre Marcel
Hills Michael Robert
Stollmaier Friederike Theresia
Borden Ladner Gervais Llp
Ecosynthetix Inc
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