Use of a mineral-material steric dispersing agent in water,...

Details Use of a mineral-material steric dispersing agent in water,... Use of a mineral-material steric dispersing agent in water,...

2007-10-10

2011-10-18

Halpern, Mark (Department: 1741)

Paper making and fiber liberation

Processes and products

Mineral fiber

Reexamination Certificate

active

08038843

ABSTRACT:
A method for manufacturing a sheet of paper from a pulp and a sheet of paper obtained by the present method, wherein said pulp comprises a mixture of natural and/or synthetic fibers, water, and at least one aqueous suspension and/or dispersion comprising at least one mineral material, wherein said dispersion or suspension comprises, as a steric dispersing agent of at least one mineral material, at least one copolymer comprising at least one vinylic monomer, at least one non-ionic monomer, or a mixture of several monomers having formula (I) in the present method, wherein said agent limits the presence of divalent ions in the aqueous phase and said agent is not a chelating agent.

REFERENCES:
patent: 6057398 (2000-05-01), Blum
patent: 2004/0019148 (2004-01-01), Suau et al.
patent: 0 892 111 (1999-01-01), None
patent: 2 810 261 (2001-12-01), None
U.S. Appl. No. 12/444,591, filed Apr. 7, 2009, Mongoin, et al.

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