Paper making and fiber liberation – Processes and products – Non-fiber additive
Reexamination Certificate
2005-01-25
2005-01-25
Chin, Peter (Department: 1731)
Paper making and fiber liberation
Processes and products
Non-fiber additive
C162S163000, C162S164100, C162S164500, C162S164600, C162S165000, C162S168100, C162S168200, C162S168300, C162S175000, C162S183000
Reexamination Certificate
active
06846384
ABSTRACT:
A process for sizing paper comprising adding to an aqueous suspension containing cellulosic fibers, and optional fillers, an anionic or cationic sizing dispersion, and a sizing promoter comprising a cationic organic polymer having an aromatic group; and an anionic polymer having an aromatic group selected from step-growth polymers, polysaccharides and naturally occurring aromatic polymers, wherein the sizing dispersion and sizing promoter are added separately to the aqueous suspension.
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Frölich Sten
Lindgren Erik
Persson Michael
Akzo Nobel N.V.
Burke Michelle J.
Chin Peter
Fennelly Richard P.
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