Method of making sized paper

Details Method of making sized paper Method of making sized paper

D - Textiles, Paper

21

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D21J 5/00 (2006.01) D21H 17/35 (2006.01) D21H 17/37 (2006.01) D21H 17/45 (2006.01) D21H 17/63 (2006.01) D21H 23/76 (2006.01)

Patent

CA 1084212

ABSTRACT OF THE DISCLOSURE A method of making sized paper comprises treating an aqueous pulp slurry containing a cationic neutral sizing agent or a wet sheet prepared with an oxidizing agent. The cationic neutral sizing agent may comprise an acid salt or a quarternary ammonium salt of a diamine derivative of a copolymer formed by reaction of a C6-40 .alpha.-olefin-maleic anhydride copolymer with a diamine having at least one primary amino group. The oxidizing agent may be a halogen e.g. chlorine, bromine or iodine, an oxyacid of a halogen, a salt of an oxyacid of a halogen, e.g. sodium hypochlorite, an oxide of a heavy metal or ozone.

257530

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