Coating process for papers and cardboards and its use for obtaining paper which has a good smoothness
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United States of America Patent
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Jun 15, 1993
Grant Date -
N/A
app pub date -
Feb 24, 1992
filing date -
Feb 25, 1991
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Coating process for papers and cardboards, in which cross-linked polymers insoluble in water, containing in molar proportions in the polymerized state: 50 to 99.995% acrylic acid at least 70% of which is in the form of ammonium acrylate, 0.005 to 0.5% bisacrylamidoacetic acid which has about the same neutralization ratio as acrylic acid and, the complement to 100% with acrylamide, are used as coating agent, and use in paper coating.
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