Waterproofing agent for ink jet printing paper
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United States of America Patent
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Oct 31, 2000
Issued Date -
N/A
app pub date -
Apr 6, 1999
filing date -
Sep 12, 1996
priority date (Note) -
Expired
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Abstract
A waterproofing agent for ink jet printing paper comprising an aqueous cationic polyurethane resin solution prepared by dispersing or dissolving in water one or more types of cationic polyurethane resins obtained by neutralizing with acid or quaternizing with a quaternizing agent part or all of the tertiary amino groups of a polyurethane molecule obtained by isocyanate polyaddition reaction of a polyol with at least 2 active hydrogen atoms which can react with isocyanate groups and with a weight average molecular weight of 300-5000, a diol, triol, diamine or triamine compound with a tertiary amino group and a weight average molecular weight of less than 300, and an organic isocyanate with at least 2 isocyanate groups.
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