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US 12,617,956 B2Granted
Aqueous inkjet compositions comprising hydroxy-functional polyurethane dispersions
AssigneeSun Chemical Corporation
InventorDerek Illsley
Life of this patent
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Abstract
Ink and coating compositions, including inkjet inks, comprising a blend of OH-PUDs having hydroxyl values preferably greater than 25, and more preferably greater than 50 mgKOH/g, with PUDs having hydroxyl values of less than 25, and more preferably less than 5 mgKOH/g.
Claims24
An aqueous ink or coating composition comprising a first hydroxyl-functionalised polyurethane dispersion having a hydroxyl value of 25 mgKOH/g or greater, and a second polyurethane dispersion having a hydroxyl value of less than 25 mgKOH/g,
- wherein the ratio of the first hydroxyl-functionalised polyurethane dispersion to the second polyurethane dispersion, based on the dry polymer weight, is in the range 20:1 to 1:10.
Dependencies are inferred from the claim text.