Paper sized with a sizing agent and a selected sizing promoter

Details Paper sized with a sizing agent and a selected sizing promoter Paper sized with a sizing agent and a selected sizing promoter

2007-09-18

2007-09-18

Halpern, Mark (Department: 1731)

Paper making and fiber liberation

Processes and products

Non-fiber additive

C162S158000, C162S162000, C162S164100, C162S179000, C162S180000, C162S183000, C162S184000, C526S310000, C526S312000

Reexamination Certificate

active

10424502

ABSTRACT:
Sized paper containing an amphoteric promoter resin that is a polymerization reaction product of a quaternary diallylammonium monomer, optionally a diallylammonium monomer, and an unsaturated organic acid is described. The method of sizing paper with such amphoteric promoter resin compound and a sizing agent provides sized paper with significantly improved sizing property characteristics, and the sized paper exhibits superior retention of brightness due to added optical brighteners.

REFERENCES:
patent: 3912693 (1975-10-01), Shimizu et al.
patent: 4772462 (1988-09-01), Boothe et al.
patent: 5013456 (1991-05-01), St. John et al.
patent: 5498648 (1996-03-01), De Clercq et al.
patent: 5853542 (1998-12-01), Bottorff
patent: 6-116341 (1994-04-01), None
patent: 8-49193 (1996-02-01), None
patent: 9-241977 (1998-09-01), None

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