Back to results
US 11,136,463 B2Granted
One-component aqueous coating compositions containing polyurethane and phyllosilicates for oxygen barrier coatings
AssigneeBASF SE
InventorsInes Pietsch, Konrad Roschmann, Christine Tonhauser, Kristina Georgieva, Josef Breu, Patrick Feicht
Life of this patent
Estimating the term…
Abstract
Described is an aqueous one-component coating composition comprising dispersed polyurethane and phyllosilicate. The polyurethane carries acid groups which are at least partially neutralized with a hydrophilic base selected from inorganic bases and organic mono-amines. The hydrophilic base has a water solubility at 20° C. of at least 150 g/l, preferably of at least 200 g/l. The composition can be used for providing oxygen barrier properties to a polymer film.
Claims17
A one-component aqueous coating composition, comprising:
- (a) at least one dispersed polyurethane in a range of 10 to 90 wt. % with respect to a solids content of the one-component aqueous coating composition;
- and
- (b) at least one phyllosilicate in a range of 5 to 75 wt. % with respect to the solids content;
- wherein the at least one dispersed polyurethane comprises at least one acid functional group;
- the at least one acid functional group is at least partially neutralized with at least one hydrophilic base selected from the group consisting of an inorganic base and an organic mono-amine;
- the at least one hydrophilic base has a water solubility at 20° C. of at least 150 g/L;
- and
- the coating composition comprises no crosslinker for the at least one dispersed polyurethane.
5 more elements
Dependencies are inferred from the claim text.