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US 11,708,505 B2Granted
Aqueous polyurethane resin dispersion
AssigneeAgfa NV
InventorsHubertus Van Aert, Ellen Bertels
Life of this patent
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Abstract
An aqueous polyurethane resin having a cationic group in a side chain thereof is obtainable by reacting a polyester polyol, a polyisocyanate, and a diol containing a quaternary N-atom or amino group, the quaternary N-atom or amino group being not present in the carbon chain between the two hydroxyl groups of the diol. The polyester polyol is obtained by reacting an aromatic polycarboxylic acid and a polyol. The polyurethane resin is suitable as a resin in treatment liquids for inkjet printing.
Claims12
An aqueous polyurethane resin dispersion comprising:
- a polyurethane resin obtained by reacting a polyester polyol, a polyisocyanate, and a diol including a quaternary N-atom or a tertiary amino group;
- wherein
- the quaternary N-atom or the tertiary amino group is present in a side chain of a carbon chain linking two hydroxyl groups of the diol and at least one of the hydroxyl groups is bonded to a primary carbon;
- and
- the polyester polyol is obtained by reacting a polyol and an aromatic polycarboxylic acid selected from the group consisting of terephthalic acid, isophthalic acid, and a combination thereof.
2 more elements
Dependencies are inferred from the claim text.