US 12,139,648 B2
Latently reactive polyurethane-based adhesive film
Annette Kelsch, Melsbach (DE); Jana Ast, Andernach (DE); and Kerstin Schindler, Rederscheid (DE)
Assigned to LOHMANN GMBH & CO. KG, Neuwied (DE)
Appl. No. 17/298,296
Filed by LOHMANN GMBH & CO. KG, Neuwied (DE)
PCT Filed Nov. 29, 2018, PCT No. PCT/EP2018/083069
§ 371(c)(1), (2) Date May 28, 2021,
PCT Pub. No. WO2020/108765, PCT Pub. Date Jun. 4, 2020.
Prior Publication US 2022/0025229 A1, Jan. 27, 2022
Int. Cl. C09J 7/35 (2018.01); C08G 18/75 (2006.01); C08G 18/76 (2006.01); C08K 3/08 (2006.01); C08K 3/40 (2006.01); C08K 9/02 (2006.01); C09J 9/02 (2006.01); C09J 175/04 (2006.01)
CPC C09J 175/04 (2013.01) [C08G 18/755 (2013.01); C08G 18/7621 (2013.01); C08K 3/08 (2013.01); C08K 3/40 (2013.01); C08K 9/02 (2013.01); C09J 7/35 (2018.01); C09J 9/02 (2013.01); C08K 2003/0812 (2013.01); C08K 2003/085 (2013.01); C08K 2201/001 (2013.01); C09J 2301/304 (2020.08); C09J 2301/314 (2020.08); C09J 2301/408 (2020.08); C09J 2475/00 (2013.01)] 18 Claims
 
1. A latently reactive polyurethane-based adhesive film, comprising:
up to 98 percent by weight of a polyurethane component, the polyurethane component being a crystalline polyurethane component or a crystalline and amorphous polyurethane component, or both,
2 to 80 percent by weight of a conductive filler; and
a cross-linking agent comprising an isocyanate-containing component dispersed into the polyurethane component
wherein the latently reactive conductive adhesive film has a quasi-static shear strength of at least 6 MPa on a polycarbonate.