	US 11,965,056 B2
	Drying agent for moisture-curing compositions
Christoph Thiebes, Cologne (DE); Florian Stempfle, Cologne (DE); Klaus Lorenz, Dormagen (DE); and Ute Nattke, Leverkusen (DE)
Assigned to Covestro Intellectual Property GmbH & Co. KG, Leverkusen (DE)
Appl. No. 17/267,530
Filed by Covestro Intellectual Property GmbH & Co. KG, Leverkusen (DE)
PCT Filed Aug. 14, 2019, PCT No. PCT/EP2019/071840 § 371(c)(1), (2) Date Feb. 10, 2021, PCT Pub. No. WO2020/038804, PCT Pub. Date Feb. 27, 2020.
Claims priority of application No. 18189954 (EP), filed on Aug. 21, 2018.
Prior Publication US 2021/0317253 A1, Oct. 14, 2021
Int. Cl. C08G 18/28 (2006.01); C08G 18/10 (2006.01); C08G 18/24 (2006.01); C08G 18/48 (2006.01); C08G 18/73 (2006.01); C08G 18/75 (2006.01); C09D 175/08 (2006.01); C09J 175/08 (2006.01); C09K 3/10 (2006.01)

CPC C08G 18/283 (2013.01) [C08G 18/10 (2013.01); C08G 18/246 (2013.01); C08G 18/4825 (2013.01); C08G 18/4866 (2013.01); C08G 18/73 (2013.01); C08G 18/755 (2013.01); C09D 175/08 (2013.01); C09J 175/08 (2013.01); C09K 3/1021 (2013.01); C08G 2190/00 (2013.01); C09K 2200/065 (2013.01)]

17 Claims

1. A polymer composition produced by:

a) reacting an NCO-reactive polymer having a molecular weight Mn of between 2000 and 25 000 g/mol and having exactly one NCO-reactive group per molecule with a diisocyanate, the molar ratio of the diisocyanate molecules to the NCO-reactive groups of the NCO-reactive polymer being at least 2:1;

and subsequently

b) reacting the remaining NCO groups in the reaction product from step a) with an NCO-reactive silane.