US 12,281,444 B2
Barrier coating for paper and paperboard
Mikael Gällstedt, Stockholm (SE); Fredrik Wernersson Brodin, Kungsbacka (SE); and Åsa Nyflott, Karlstad (SE)
Assigned to Stora Enso OYJ, Helsinki (FI)
Appl. No. 18/003,711
Filed by Stora Enso OYJ, Helsinki (FI)
PCT Filed Jun. 18, 2021, PCT No. PCT/IB2021/055399
§ 371(c)(1), (2) Date Dec. 29, 2022,
PCT Pub. No. WO2022/003472, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. 2050800-8 (SE), filed on Jun. 30, 2020.
Prior Publication US 2023/0235512 A1, Jul. 27, 2023
Int. Cl. D21H 21/16 (2006.01); C09D 5/00 (2006.01); C09D 7/61 (2018.01); C09D 7/63 (2018.01); C09D 7/65 (2018.01); C09D 105/14 (2006.01); D21H 17/24 (2006.01); D21H 19/12 (2006.01); D21H 19/40 (2006.01); D21H 19/62 (2006.01)
CPC D21H 21/16 (2013.01) [C09D 5/00 (2013.01); C09D 7/61 (2018.01); C09D 7/63 (2018.01); C09D 7/65 (2018.01); C09D 105/14 (2013.01); D21H 17/24 (2013.01); D21H 19/12 (2013.01); D21H 19/40 (2013.01); D21H 19/62 (2013.01)] 19 Claims
 
1. An aqueous barrier coating composition comprising:
50-99.9% by weight of one or more anionic low molecular weight polysaccharides(s) having a degree of polymerization (DP) in a range of 2-12; and,
0.1-10% by weight of a polycationic polymer;
the weights based on a total dry weight of the aqueous barrier coating composition.