US 12,391,851 B2
Adhesive compositions comprising a combination of (I) microfibrillated cellulose and (II) a metal in an oxidation state of II or greater
Synnøve Holtan, Sarpsborg (NO); Katérina Liapis, Sarpsborg (NO); Steen Jacobsen, Sarpsborg (NO); Hans Henrik Øvrebø, Sarpsborg (NO); and Jan Berg, Sarpsborg (NO)
Assigned to Borregaard AS, Sarpsborg (NO)
Appl. No. 17/790,889
Filed by Borregaard AS, Sarpsborg (NO)
PCT Filed Feb. 5, 2021, PCT No. PCT/EP2021/052758
§ 371(c)(1), (2) Date Jul. 5, 2022,
PCT Pub. No. WO2021/156413, PCT Pub. Date Aug. 12, 2021.
Claims priority of application No. 20156214 (EP), filed on Feb. 7, 2020.
Prior Publication US 2023/0051816 A1, Feb. 16, 2023
Int. Cl. A23L 29/212 (2016.01); A23L 29/00 (2016.01); A23L 29/262 (2016.01); A23L 29/269 (2016.01); A61L 15/60 (2006.01); B31F 1/28 (2006.01); B31F 5/04 (2006.01); B32B 29/08 (2006.01); C03C 25/321 (2018.01); C03C 25/46 (2006.01); C09D 7/61 (2018.01); C09D 101/02 (2006.01); C09D 103/02 (2006.01); C09D 103/04 (2006.01); C09J 11/04 (2006.01); C09J 101/02 (2006.01); C09J 103/02 (2006.01); C09J 103/04 (2006.01)
CPC C09J 101/02 (2013.01) [A23L 29/015 (2016.08); A23L 29/212 (2016.08); A23L 29/262 (2016.08); A23L 29/273 (2016.08); A61L 15/60 (2013.01); B31F 1/2809 (2013.01); B31F 5/04 (2013.01); C03C 25/321 (2013.01); C03C 25/46 (2013.01); C09D 7/61 (2018.01); C09D 101/02 (2013.01); C09D 103/02 (2013.01); C09D 103/04 (2013.01); C09J 11/04 (2013.01); C09J 103/02 (2013.01); C09J 103/04 (2013.01); C09J 2401/00 (2013.01); C09J 2403/00 (2013.01)] 23 Claims
OG exemplary drawing
 
1. Adhesive composition, comprising:
a) microfibrillated cellulose, wherein the microfibrillated cellulose has a Schopper-Riegler (SR) method value of below 95, as determined according to EN ISO 5267-1 (in the version of 1999), or, in the alternative, cannot be reasonably measured in accordance with the SR method, as fibers of the MFC are so small that a large fraction of the fibers simply pass through a screen as defined in the SR method;
b) at least one metal in an oxidation state of II or higher;
c) at least one compound that (a) is capable of polymerizing or has already partly or fully polymerized, and that (b) has at least two groups available for hydrogen bonding that are capable of crosslinking with at least one functional group of the microfibrillated cellulose and/or the at least one metal in an oxidation state of II or higher;
d) at least one solvent,
wherein a relative amount of the at least one metal in an oxidation state of II or higher complies with at least one of the following:
(i) an amount of moles of the at least one metal in an oxidation state of II or higher, relative to a weight, in kg, of an overall adhesive composition, including solvent, is from 0.0005 to 5;
(ii) an amount of moles of the at least one metal in an oxidation state of II or higher, relative to a weight of dry mass of the at least one compound that (a) is capable of polymerizing or has already partly or fully polymerized, and that (b) has at least two groups available for hydrogen bonding that are capable of crosslinking with at least one functional group of the microfibrillated cellulose and/or the at least one metal in an oxidation state of II or higher, in kg, is from 0.002 to 20;
(iii) the at least one metal in an oxidation state of II or higher is present as an oxide, hydroxide or oxyhydroxide, or any mixture thereof, and a weight percentage of said oxide, hydroxide or oxyhydroxide relative to a weight of an overall adhesive composition, including solvent, is from 0.001 to 3.