Method of coating paper

Details Method of coating paper Method of coating paper

1996-12-02

1998-03-24

Pianalto, Bernard

Coating processes

Nonuniform coating

Paper or textile base

106463, 106464, 106465, 106468, 106469, 106770, 106772, 106784, 106785, 162126, 162127, 1621812, 427197, 427391, 428144, 428153, 4285375, 501144, 501145, 501146, B05D 500

Patent

active

057310343

ABSTRACT:
A method of coating paper with a paper coating composition having a solids concentration of at least 45% by weight, consisting essentially of an aqueous cationic dispersion of a particulate calcium carbonate pigment and a nonionic or cationic adhesive, wherein the pigment has a particle size distribution such that no more than 1% by weight of the particles have an equivalent spherical diameter larger than 10 microns, at least 65% by weight of the particles have an equivalent spherical diameter smaller than 2 microns and not more than 10% by weight of the particles have an equivalent spherical diameter smaller than 0.25 micron, and wherein said pigment is dispersed with a combination of a cationic polyelectrolyte and an anionic polyelectrolyte, with the amount of cationic polyelectrolyte being in the range of about 0.01% to about 1.5% by weight, based on the weight of the dry pigment, and with the amount of anionic polyelectrolyte being in the range of about 0.01% to about 0.5% by weight.

REFERENCES:
patent: 4284546 (1981-08-01), Delfosse et al.
patent: 4738726 (1988-04-01), Pratt et al.
patent: 4799964 (1989-01-01), Harvey et al.
patent: 4816074 (1989-03-01), Raythatha et al.
patent: 5102465 (1992-04-01), Lamond
patent: 5120365 (1992-06-01), Kogler
patent: 5244542 (1993-09-01), Bown et al.
patent: 5384013 (1995-01-01), Husband et al.

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