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US 10,487,453 B2Granted
Methods for treating paperboards and paper media, and associated treated paperboards and paper media
AssigneeBASF SE
InventorDaniel Niedzwiecki
Life of this patent
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Abstract
Methods for treating paperboard or paper media are provided. In these methods, a composition is applied to the surface of the paperboard or paper media. Paperboards or paper media treated in accordance with any of the methods achieved increased strength under both dry and wet testing methodologies as compared with untreated paperboards and paper media of the same basis weight.
Claims15
A method for treating paperboard or paper media comprising the steps of:
- providing a first composition which comprises at least one component selected from a multifunctional alcohol, an amine, an amine derivative, a tin-based catalyst, and combinations thereof;
- providing a second composition comprising an isocyanate component;
- applying one of the first composition and the second composition onto a surface of the paperboard or paper media;
- applying the other of the first composition and the second composition onto the surface of the paperboard or paper media to form polyurethanes, polyureas, and/or polycarbodiimides,
- wherein the isocyanate component is selected from the group of methylene diphenyl diisocyanate, polymethylene polyphenylisocyanate, an isocyanate-terminated prepolymer, a carbodiimide polymer having unreacted isocyanate groups, and combinations thereof,
- wherein the first and second compositions are applied in either order to produce a treated paperboard or paper media.
3 more elements
Dependencies are inferred from the claim text.