US 12,421,434 B2
Adhesives
Joerg Buechner, Bergisch Gladbach (DE); Harald Kraus, Leverkusen (DE); Thomas Fait, Cologne (DE); and Wolfgang Arndt, Dormagen (DE)
Assigned to Covestro Deutschland AG, Leverkusen (DE)
Appl. No. 18/290,175
Filed by Covestro Deutschland AG, Leverkusen (DE)
PCT Filed May 9, 2022, PCT No. PCT/EP2022/062390
§ 371(c)(1), (2) Date Nov. 10, 2023,
PCT Pub. No. WO2022/238279, PCT Pub. Date Nov. 17, 2022.
Claims priority of application No. 21173508 (EP), filed on May 12, 2021.
Prior Publication US 2024/0254375 A1, Aug. 1, 2024
Int. Cl. C09J 175/04 (2006.01); C08G 18/08 (2006.01); C08G 18/28 (2006.01); C08G 18/42 (2006.01); C08G 18/70 (2006.01); C08G 18/72 (2006.01); C09J 7/00 (2018.01); C09J 175/02 (2006.01)
CPC C09J 175/04 (2013.01) [C08G 18/0828 (2013.01); C08G 18/0866 (2013.01); C08G 18/283 (2013.01); C08G 18/4238 (2013.01); C08G 18/706 (2013.01); C08G 18/722 (2013.01); C09J 7/00 (2013.01); C09J 175/02 (2013.01); C08G 2170/80 (2013.01); C08G 2250/00 (2013.01)] 12 Claims
 
1. An aqueous dispersion containing at least one semicrystalline polyurethane-polyurea polymer and at least one surface-deactivated polyisocyanate, wherein the melting temperature of the at least one semicrystalline polyurethane-polyurea polymer is at least 55° C.,
wherein the at least one semicrystalline polyurethane-polyurea polymer is formed from
A(i) at least one crystalline or semicrystalline difunctional polyester polyol having a number-average molecular weight of at least 400 g/mol and a melting temperature of at least 55° C.,
A(ii) optionally at least one difunctional polyol component having a number-average molecular weight of 62 to 399 g/mol,
A(iii) at least one isocyanate component,
A(iv) at least one isocyanate-reactive component bearing at least one ionic or potentially ionic group and
A(v) optionally further isocyanate-reactive components, and
wherein the at least one semicrystalline polyurethane-polyurea polymer contains 50% to 95% by weight of constituent A(i), 0% to 10% by weight of constituent A(ii), 4% to 25% by weight of constituent A(iii), 0.5% to 10% by weight of constituent A(iv) and 0% to 30% by weight of constituent A(v), wherein the constituents sum to 100% by weight.