US 11,787,983 B2
Method of making film laminates using amine-reactive acrylic lamination adhesives
Karl-Heinz Schumacher, Ludwigshafen am Rhein (DE); Matthias Gerst, Ludwigshafen am Rhein (DE); Peter Preishuber-Pfluegl, Ludwigshafen am Rhein (DE); Kevin Payne, Wyandotte, MI (US); and Timothy Klots, Wyandotte, MI (US)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 17/633,972
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed Aug. 10, 2020, PCT No. PCT/EP2020/072417
§ 371(c)(1), (2) Date Feb. 9, 2022,
PCT Pub. No. WO2021/032524, PCT Pub. Date Feb. 25, 2021.
Claims priority of provisional application 62/889,903, filed on Aug. 21, 2019.
Prior Publication US 2022/0325147 A1, Oct. 13, 2022
Int. Cl. C09J 133/08 (2006.01); B32B 7/12 (2006.01); B32B 27/08 (2006.01); B32B 27/32 (2006.01); B32B 27/36 (2006.01); B32B 37/12 (2006.01); B32B 37/24 (2006.01)
CPC C09J 133/08 (2013.01) [B32B 7/12 (2013.01); B32B 27/08 (2013.01); B32B 27/32 (2013.01); B32B 27/36 (2013.01); B32B 37/1284 (2013.01); B32B 37/24 (2013.01); B32B 2037/243 (2013.01); B32B 2250/02 (2013.01); B32B 2250/24 (2013.01); B32B 2255/10 (2013.01); B32B 2255/26 (2013.01); B32B 2307/518 (2013.01); B32B 2307/54 (2013.01); B32B 2307/748 (2013.01)] 16 Claims
 
1. A method of making film laminates, the method comprising the steps of
(i) coating a film substrate with at least one lamination adhesive; and
(ii) laminating the coated film onto a substrate;
wherein the lamination adhesive is a two-component, solventless adhesive and comprises
(a) a first component comprising at least one acrylic polymer A with anhydride groups which are reactive with primary or secondary amine groups; and
(b) a second component comprising at least one compound B with at least two amine groups selected from primary and secondary amine groups;
wherein the acrylic polymer A has a weight average molecular weight of from 3000 to 50000;
wherein the lamination adhesive is free of organic solvents, free of water and free of compounds with isocyanate groups.