Coating processes – Nonuniform coating – Paper or textile base
Patent
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.
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ECC International Limited
Pianalto Bernard
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