US 11,926,701 B2
Polycarbonate polyols, polyisocyanate prepolymers and polyurethane and polyurethane urea elastomers based thereon
Hartmut Nefzger, Pulheim (DE); Harald Knaup, Neuss (DE); Hans-Peter Huber, Cologne (DE); Andreas Stumpf, Palm Jumeirah (AE); and Stephan Reiter, Langenfeld (DE)
Assigned to Covestro Deutschland AG, Leverkusen (DE)
Appl. No. 16/956,545
Filed by Covestro Deutschland AG, Leverkusen (DE)
PCT Filed Dec. 12, 2018, PCT No. PCT/EP2018/084517
§ 371(c)(1), (2) Date Jun. 19, 2020,
PCT Pub. No. WO2019/121218, PCT Pub. Date Jun. 27, 2019.
Claims priority of application No. 17208595 (EP), filed on Dec. 19, 2017.
Prior Publication US 2023/0098913 A1, Mar. 30, 2023
Int. Cl. C08G 18/10 (2006.01); C08G 18/44 (2006.01); C08G 64/30 (2006.01)
CPC C08G 64/305 (2013.01) [C08G 18/10 (2013.01); C08G 18/44 (2013.01)] 15 Claims
 
1. A polycarbonate polyol having an OH number of 40 to 80 mg KOH/g according to DIN 53240-1 of June 2013 (without catalyst) and a mean functionality of 1.9 to 2.2, comprising the reaction product of
A) at least one a,w-alkanediol having 4 to 8 carbon atoms,
B) at least one polytetrahydrofuran, and
C) diethylene glycol with at least one
D) carbonyl component selected from the group consisting of diaryl carbonates, dialkyl carbonates, cyclic alkylene carbonates and COCl2, and mixtures thereof.