Method for producing paper, paperboard and cardboard

Details Method for producing paper, paperboard and cardboard Method for producing paper, paperboard and cardboard

D - Textiles, Paper

21

H

D21H 21/02 (2006.01) C08F 8/32 (2006.01) C08F 8/44 (2006.01) C08G 73/02 (2006.01) D21H 17/45 (2006.01) D21H 17/54 (2006.01) D21H 21/10 (2006.01) D21H 17/08 (2006.01) D21H 17/14 (2006.01) D21H 17/17 (2006.01) D21H 17/37 (2006.01) D21H 17/38 (2006.01) D21H 17/49 (2006.01) D21H 17/55 (2006.01) D21H 17/56 (2006.01) D21H 21/16 (2006.01)

Patent

CA 2288109

The invention relates to a method for producing paper, paperboard and cardboard by dehydrating paper material containing interfering substances in the presence of fixing agents. Reaction products are used as fixing agents. Said products are obtained by reacting polymers, containing amino and/or ammonium groups, from the group of of: polymers containing vinyl amino units, polyalkylene polyamines, polyamidoamines, polyamidoamines grafted with ethylene imine and optionally cross-linked, polydiallydldimethylammoniumchlorides: polymers containing dialkylaminoalkylacrylamide-units or dialkylaminoalkylmethacrylamide units and polyallylamines and dicyandiamide-formaldehyde-condensates, with reactive sizing agents for paper with a polymer/reactive sizing agent weight ratio of 15,000 : 1 to 1 : 1. The invention also relates to reaction products thus obtained and to their use as fixing agents for water soluble and water insoluble interfering substances in the production of paper, paperboard and cardboard from paper materials containing interfering substances.

L'invention concerne un procédé pour produire du papier, du carton souple et du carton épais par déshydratation d'une pâte de papier contenant des substances perturbatrices, en présence d'agents de fixation, les agents de fixation utilisés étant des produits de réaction obtenus par réaction de polymères contenant des groupes amino et/ou ammonium et sélectionnés dans le groupe comprenant: des polymérisats contenant des unités vinylamine; des polyamines de polyalkylène; des polyamidoamines; des polyamidoamines greffées par imine d'éthylène, pouvant éventuellement être réticulées; du chlorure de polydiallyldiméthylammonium; des polymères contenant des unités dialkylaminoalkylacrylamide ou des unités dialkylaminoalkyleméthacrylamide et des condensats dicyandiamide-formaldéhyde; avec des agents d'encollage réactifs pour papier, dans un rapport en poids polymère/agent d'encollage réactif de 15.000 : 1 à 1 : 1. L'invention concerne en outre l'utilisation des produits de réaction ainsi obtenus, comme agents de fixation pour des substances perturbatrices solubles dans l'eau ou non, dans le cadre de la fabrication de papier, de carton souple et de carton à partir de pâtes à papier contenant des substances perturbatrices.

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