US 11,879,214 B2
Environmentally-friendly heat sealable aqueous barrier coating for cellulosic substrate and methods of making and using the same
Anshyang Lin, Mt. Laurel, NJ (US); Stephen Martin, Monroe Township, NJ (US); Carmen Panto, Jr., Marlton, NJ (US); and Grant Schutte, Pittsburgh, PA (US)
Assigned to ACTEGA NORTH AMERICA, INC., Cinnaminson, NJ (US)
Filed by Actega North America, Inc., Cinnaminson, NJ (US)
Filed on Feb. 18, 2021, as Appl. No. 17/178,715.
Claims priority of provisional application 63/020,103, filed on May 5, 2020.
Prior Publication US 2021/0348338 A1, Nov. 11, 2021
Int. Cl. D21H 21/16 (2006.01); C09D 5/00 (2006.01); C09D 123/08 (2006.01); D21H 19/82 (2006.01); C09D 7/65 (2018.01); D21H 19/12 (2006.01); C09D 133/06 (2006.01)
CPC D21H 21/16 (2013.01) [C09D 5/002 (2013.01); C09D 7/65 (2018.01); C09D 123/0869 (2013.01); C09D 133/062 (2013.01); D21H 19/12 (2013.01); D21H 19/824 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An aqueous barrier coating for shape-formable cellulosic substrates, wherein said coating is polyurethane free and comprises as components:
A) at least one polymer binder dispersion at 40 wt. % to 95 wt. % of the coating:
B) at least one active filler at 3 wt. % to 30 wt. % of the coating; and
C) one or more optional additives, wherein crystallinity is present in at least one of component A) and component B), and wherein a resulting dried film of the coating has a shear storage modulus between 50° C. and 60° C. in the range of 1.5×106 to 1×109 Pascals, a shear storage modulus between 80° C. and 90° C. in the range of 2×105 to 5×107 Pascals, and a shear storage modulus between 100° C. and 110° C. in the range of 5×103 to 1×106 Pascals.