Surface modified fillers for sizing paper

D - Textiles – Paper – 21 – H

Patent

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Details

D21H 17/69 (2006.01) C08K 3/00 (2006.01) D21H 17/07 (2006.01) D21H 17/63 (2006.01) D21H 21/16 (2006.01) D21H 23/04 (2006.01) D21H 17/37 (2006.01) D21H 17/67 (2006.01)

Patent

CA 2336860

A hydrophobic filler material for neutral, alkaline and acidic papers is disclosed. The filler material comprises finely divided particles of an inorganic material, in admixture with a water miscible, butyl acrylate- acrylonitrile copolymer. A neutral or alkaline paper is disclosed. The neutral or alkaline paper comprises a hydrophobic filler material comprising inorganic material, in admixture with a water miscible, butyl acrylate-acrylonitrile copolymer. A method for improving sizing characteristics of neutral or alkaline paper is disclosed, comprising preparing a filler material and adding the same to cellulose fiber. The filler material is prepared by selecting particles of an inorganic material and admixing with a water miscible, butyl acrylate-acrylonitrile copolymer, forming a hydrophobic system.

L'invention concerne une matière de charge hydrophobe destinée à de papiers neutres, alcalins ou acides. Cette matière de charge comprend des particules finement divisées d'une matière organique, dans un mélange contenant un copolymère d'acrylate de butyle et d'acrylonitrile miscible dans l'eau. On décrit du papier neutre ou alcalin qui comprend une matière de charge hydrophobe présentant une matière organique dans un mélange contenant un copolymère d'acrylate de butyle et d'acrylonitrile miscible dans l'eau. L'invention concerne un procédé qui permet d'améliorer les caractéristiques de calibrage d'un papier neutre ou alcalin. Ce procédé consiste à préparer une matière de charge et à l'ajouter à des fibres cellulosiques. La matière de charge est préparée par sélection de particules d'une matière organique, lesdites particules étant ensuite mélangées avec un copolymère d'acrylate de butyle et d'acrylonitrile miscible dans l'eau pour former un système hydrophobe.

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